/* roulang page: index */
:root {
            --primary: #1a56db;
            --primary-dark: #1040b0;
            --primary-light: #e8f0fe;
            --primary-50: #eff6ff;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fef3c7;
            --bg: #f8fafc;
            --surface: #ffffff;
            --surface-alt: #f1f5f9;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(0, 0, 0, 0.05);
            --radius-xs: 4px;
            --radius-sm: 6px;
            --radius: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --sidebar-width: 250px;
            --header-height: 60px;
            --transition: 0.2s ease;
            --transition-slow: 0.35s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --section-gap: 64px;
            --section-gap-sm: 40px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            display: flex;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: 2.5rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 1.85rem;
            letter-spacing: -0.01em;
        }
        h3 {
            font-size: 1.35rem;
        }
        h4 {
            font-size: 1.15rem;
        }

        /* Sidebar Navigation */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--surface);
            border-right: 1px solid var(--border);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-md);
            transition: transform var(--transition-slow);
        }
        .sidebar-logo {
            padding: 20px 24px;
            border-bottom: 1px solid var(--border-light);
            flex-shrink: 0;
        }
        .sidebar-logo a {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .sidebar-nav {
            flex: 1;
            overflow-y: auto;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 16px;
            border-radius: var(--radius);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .sidebar-nav a:hover {
            background: var(--primary-50);
            color: var(--primary);
        }
        .sidebar-nav a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: var(--shadow-md);
        }
        .sidebar-nav a .nav-icon {
            width: 20px;
            text-align: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-light);
            flex-shrink: 0;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .sidebar-footer .sidebar-cta {
            display: block;
            width: 100%;
            padding: 10px 16px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius);
            text-align: center;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
            margin-bottom: 8px;
        }
        .sidebar-footer .sidebar-cta:hover {
            background: var(--accent-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
        }

        /* Main Content */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        /* Mobile Header */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            z-index: 999;
            align-items: center;
            padding: 0 16px;
            justify-content: space-between;
            box-shadow: var(--shadow-sm);
        }
        .mobile-header .mobile-logo {
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--primary);
        }
        .mobile-header .hamburger {
            width: 40px;
            height: 40px;
            background: none;
            border: none;
            display: flex;
            flex-direction: column;
            gap: 5px;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            z-index: 1001;
            padding: 8px;
            border-radius: var(--radius-sm);
        }
        .mobile-header .hamburger span {
            display: block;
            width: 22px;
            height: 2.5px;
            background: var(--text);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 998;
        }

        /* Container */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 32px;
            width: 100%;
        }

        /* Sections */
        section {
            padding: var(--section-gap) 0;
        }
        section.section-sm {
            padding: var(--section-gap-sm) 0;
        }
        .section-header {
            margin-bottom: 40px;
        }
        .section-header .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-50);
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.03em;
        }
        .section-header h2 {
            margin-bottom: 8px;
        }
        .section-header p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 680px;
        }

        /* Hero Flash Sale */
        .hero-flash {
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 40%, #1a56db 100%);
            color: #fff;
            position: relative;
            overflow: hidden;
            padding: 48px 0 56px;
        }
        .hero-flash::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.18;
            z-index: 0;
        }
        .hero-flash .container {
            position: relative;
            z-index: 1;
        }
        .hero-flash-top {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 28px;
            flex-wrap: wrap;
        }
        .flash-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #ef4444;
            color: #fff;
            padding: 8px 18px;
            border-radius: 24px;
            font-weight: 700;
            font-size: 0.9rem;
            animation: pulse-badge 2s infinite;
            white-space: nowrap;
        }
        @keyframes pulse-badge {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.6);
            }
            50% {
                box-shadow: 0 0 0 14px rgba(239, 68, 68, 0);
            }
        }
        .flash-countdown {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #fbbf24;
            font-weight: 700;
            font-size: 1.1rem;
        }
        .flash-countdown .cd-box {
            background: rgba(255, 255, 255, 0.15);
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            font-size: 1.3rem;
            font-weight: 800;
            min-width: 44px;
            text-align: center;
            color: #fff;
        }
        .hero-flash-body {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .hero-flash-text h1 {
            font-size: 2.8rem;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -0.03em;
            line-height: 1.2;
        }
        .hero-flash-text .hero-sub {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 24px;
            line-height: 1.6;
        }
        .hero-flash-text .hero-cta-row {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .btn-primary {
            background: #fff;
            color: var(--primary-dark);
            box-shadow: var(--shadow-md);
        }
        .btn-primary:hover {
            background: #f0f4ff;
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            color: var(--primary-dark);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: var(--shadow-md);
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.5);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
        }
        .btn-lg {
            padding: 14px 30px;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }
        .hero-product-card {
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-xl);
            padding: 28px;
            text-align: center;
        }
        .hero-product-card .product-tag {
            display: inline-block;
            background: #ef4444;
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 12px;
            margin-bottom: 12px;
            letter-spacing: 0.05em;
        }
        .hero-product-card h3 {
            color: #fff;
            font-size: 1.4rem;
            margin-bottom: 6px;
        }
        .hero-product-card .product-price {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fbbf24;
            margin: 10px 0;
        }
        .hero-product-card .product-price .original {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.5);
            text-decoration: line-through;
            margin-left: 8px;
            font-weight: 400;
        }
        .hero-product-card .product-features {
            text-align: left;
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.9rem;
            margin: 16px 0;
            line-height: 1.8;
        }
        .hero-product-card .product-features i {
            color: #34d399;
            margin-right: 6px;
        }

        /* Metrics Dashboard */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .metric-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .metric-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .metric-card .metric-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 1.3rem;
        }
        .metric-card .metric-value {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
        }
        .metric-card .metric-label {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-top: 4px;
        }

        /* Service Matrix */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .service-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .service-card:hover {
            box-shadow: var(--shadow-xl);
            transform: translateY(-4px);
        }
        .service-card .card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .service-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .service-card:hover .card-img img {
            transform: scale(1.06);
        }
        .service-card .card-body {
            padding: 22px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .service-card .card-body h3 {
            margin-bottom: 8px;
            font-size: 1.2rem;
        }
        .service-card .card-body p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            flex: 1;
            margin-bottom: 14px;
            line-height: 1.6;
        }
        .service-card .card-body .btn {
            align-self: flex-start;
        }

        /* Hot List */
        .hot-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 12px;
            counter-reset: hotlist;
        }
        .hot-item {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--surface);
            border-radius: var(--radius);
            padding: 16px 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            counter-increment: hotlist;
        }
        .hot-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .hot-item .hot-rank {
            width: 36px;
            height: 36px;
            background: var(--primary-50);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1rem;
            flex-shrink: 0;
        }
        .hot-item:nth-child(1) .hot-rank {
            background: #fef3c7;
            color: #d97706;
        }
        .hot-item:nth-child(2) .hot-rank {
            background: #e8f0fe;
            color: #1a56db;
        }
        .hot-item:nth-child(3) .hot-rank {
            background: #fce7f3;
            color: #be185d;
        }
        .hot-item .hot-info {
            flex: 1;
            min-width: 0;
        }
        .hot-item .hot-info h4 {
            font-size: 1rem;
            margin-bottom: 3px;
        }
        .hot-item .hot-info p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .hot-item .btn-sm {
            flex-shrink: 0;
        }

        /* Limited Entry */
        .limited-entry {
            background: linear-gradient(135deg, #fef3c7 0%, #fff7ed 50%, #fef3c7 100%);
            border: 2px solid #fbbf24;
            border-radius: var(--radius-xl);
            padding: 36px 32px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .limited-entry::before {
            content: '';
            position: absolute;
            top: -30px;
            right: -30px;
            width: 120px;
            height: 120px;
            background: rgba(245, 158, 11, 0.1);
            border-radius: 50%;
        }
        .limited-entry .entry-countdown {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 1.5rem;
            font-weight: 800;
            color: #d97706;
            margin-bottom: 16px;
        }
        .limited-entry .entry-countdown .cd-box-lg {
            background: #fff;
            padding: 10px 18px;
            border-radius: var(--radius);
            font-size: 2rem;
            font-weight: 800;
            color: #d97706;
            min-width: 56px;
            text-align: center;
            box-shadow: var(--shadow);
        }
        .limited-entry h3 {
            font-size: 1.5rem;
            margin-bottom: 8px;
        }
        .limited-entry p {
            color: var(--text-secondary);
            margin-bottom: 18px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        /* Scene Demo */
        .scene-demo {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .scene-steps {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .scene-step {
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }
        .scene-step .step-num {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .scene-step .step-content h4 {
            font-size: 1.05rem;
            margin-bottom: 4px;
        }
        .scene-step .step-content p {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .scene-visual {
            background: var(--surface);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            height: 380px;
        }
        .scene-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* News Section */
        .news-layout {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 32px;
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .news-item {
            padding: 18px 0;
            border-bottom: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .news-item:hover {
            padding-left: 8px;
        }
        .news-item .news-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 4px;
        }
        .news-item h4 {
            font-size: 1.05rem;
            margin-bottom: 4px;
            line-height: 1.4;
        }
        .news-item h4 a {
            color: var(--text);
        }
        .news-item h4 a:hover {
            color: var(--primary);
        }
        .news-item .news-summary {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.5;
            margin-bottom: 8px;
        }
        .news-item .btn-sm {
            font-size: 0.8rem;
        }
        .news-sidebar {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            height: fit-content;
            position: sticky;
            top: 20px;
        }
        .news-sidebar h4 {
            margin-bottom: 14px;
            font-size: 1.05rem;
        }
        .news-sidebar ul li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.9rem;
        }
        .news-sidebar ul li a {
            color: var(--text);
            transition: color var(--transition);
        }
        .news-sidebar ul li a:hover {
            color: var(--primary);
        }
        .news-sidebar ul li .side-date {
            font-size: 0.75rem;
            color: var(--text-muted);
            display: block;
        }

        /* Quick Answers */
        .quick-answers-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        .qa-card {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .qa-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .qa-card .qa-q {
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 8px;
            color: var(--primary);
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }
        .qa-card .qa-q i {
            color: var(--accent);
            flex-shrink: 0;
            margin-top: 3px;
        }
        .qa-card .qa-a {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* Security System */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .security-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .security-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .security-card .sec-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: #ecfdf5;
            color: #059669;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 1.5rem;
        }
        .security-card h4 {
            font-size: 1rem;
            margin-bottom: 6px;
        }
        .security-card p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* Channel Selling Points */
        .channel-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }
        .channel-steps {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .channel-step {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            background: var(--surface);
            padding: 18px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .channel-step .cs-num {
            width: 34px;
            height: 34px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            flex-shrink: 0;
            font-size: 0.9rem;
        }
        .channel-step .cs-content h4 {
            font-size: 0.95rem;
            margin-bottom: 2px;
        }
        .channel-step .cs-content p {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }
        .channel-faq {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        .channel-faq h4 {
            margin-bottom: 14px;
        }
        .channel-faq .cf-item {
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .channel-faq .cf-item:last-child {
            border-bottom: none;
        }
        .channel-faq .cf-q {
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .channel-faq .cf-a {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-top: 6px;
            line-height: 1.5;
        }

        /* Results Comparison */
        .comparison-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            background: var(--surface);
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 700px;
        }
        .comparison-table th,
        .comparison-table td {
            padding: 16px 20px;
            text-align: center;
            border-bottom: 1px solid var(--border-light);
        }
        .comparison-table th {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
        }
        .comparison-table th:first-child {
            background: #1e293b;
        }
        .comparison-table td {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .comparison-table tr:nth-child(even) td {
            background: var(--surface-alt);
        }
        .comparison-table .highlight-col {
            color: var(--primary);
            font-weight: 700;
        }
        .comparison-table .check-icon {
            color: #059669;
            font-weight: 700;
        }
        .comparison-table .cross-icon {
            color: #dc2626;
        }

        /* Brand Intro */
        .brand-intro {
            background: var(--surface);
            border-radius: var(--radius-xl);
            padding: 40px 36px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-light);
            line-height: 1.9;
        }
        .brand-intro p {
            color: var(--text-secondary);
            font-size: 1rem;
            margin-bottom: 12px;
        }
        .brand-intro p:last-child {
            margin-bottom: 0;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-item .faq-q {
            padding: 18px 20px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 1rem;
            user-select: none;
        }
        .faq-item .faq-q .faq-arrow {
            transition: transform var(--transition);
            color: var(--text-muted);
        }
        .faq-item.open .faq-q .faq-arrow {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-item .faq-a {
            padding: 0 20px 18px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-a {
            display: block;
        }

        /* CTA Form */
        .cta-form-section {
            background: linear-gradient(135deg, #1a56db 0%, #1040b0 100%);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-form-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
        }
        .cta-form-section h2 {
            color: #fff;
            margin-bottom: 8px;
        }
        .cta-form-section p {
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 24px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-form {
            display: flex;
            gap: 10px;
            max-width: 500px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }
        .cta-form input {
            flex: 1;
            min-width: 200px;
            padding: 13px 18px;
            border-radius: var(--radius);
            border: 2px solid transparent;
            font-size: 0.95rem;
            outline: none;
            transition: all var(--transition);
        }
        .cta-form input:focus {
            border-color: #fbbf24;
            box-shadow: 0 0 0 4px rgba(251, 191, 36, 0.2);
        }
        .cta-form .btn {
            padding: 13px 28px;
            font-size: 1rem;
        }

        /* App Download */
        .app-download {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            background: var(--surface);
            border-radius: var(--radius-xl);
            padding: 40px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-light);
        }
        .app-download .app-info h2 {
            margin-bottom: 10px;
        }
        .app-download .app-info p {
            color: var(--text-secondary);
            margin-bottom: 20px;
            line-height: 1.6;
        }
        .app-download .app-btns {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .app-download .app-btns .btn {
            padding: 12px 22px;
            font-size: 0.9rem;
        }
        .app-visual {
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .app-visual img {
            max-width: 280px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-xl);
        }

        /* Footer */
        .site-footer {
            background: #1e293b;
            color: #cbd5e1;
            padding: 48px 0 24px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 14px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
            font-size: 0.9rem;
        }
        .footer-col ul li a {
            color: #94a3b8;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: #94a3b8;
        }
        .footer-bottom a {
            color: #94a3b8;
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 48px;
                --section-gap-sm: 32px;
            }
            .sidebar {
                width: 220px;
            }
            :root {
                --sidebar-width: 220px;
            }
            .main-content {
                margin-left: 220px;
            }
            .container {
                padding: 0 20px;
            }
            .hero-flash-body {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .security-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scene-demo {
                grid-template-columns: 1fr;
            }
            .news-layout {
                grid-template-columns: 1fr;
            }
            .channel-section {
                grid-template-columns: 1fr;
            }
            .app-download {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .app-download .app-btns {
                justify-content: center;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .hero-flash-text h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay.active {
                display: block;
            }
            .main-content {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                padding-top: var(--header-height);
            }
            :root {
                --sidebar-width: 0;
                --section-gap: 40px;
                --section-gap-sm: 28px;
            }
            .container {
                padding: 0 16px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .service-grid {
                grid-template-columns: 1fr;
            }
            .security-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .quick-answers-grid {
                grid-template-columns: 1fr;
            }
            .hero-flash-body {
                grid-template-columns: 1fr;
            }
            .hero-flash-text h1 {
                font-size: 1.8rem;
            }
            .cta-form {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-form input {
                min-width: auto;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .comparison-table-wrap {
                border-radius: var(--radius);
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.35rem;
            }
            .hero-flash {
                padding: 32px 0 40px;
            }
            .app-download {
                padding: 24px 20px;
            }
            .brand-intro {
                padding: 24px 20px;
            }
            .cta-form-section {
                padding: 32px 20px;
            }
            .limited-entry {
                padding: 24px 20px;
            }
        }

        @media (max-width: 520px) {
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .metric-card {
                padding: 18px 12px;
            }
            .metric-card .metric-value {
                font-size: 1.6rem;
            }
            .security-grid {
                grid-template-columns: 1fr;
            }
            .hero-flash-top {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .hero-product-card {
                padding: 20px 16px;
            }
            .hero-product-card .product-price {
                font-size: 1.8rem;
            }
            .btn-lg {
                padding: 12px 20px;
                font-size: 0.9rem;
            }
            .hot-item {
                flex-wrap: wrap;
                gap: 10px;
            }
            .hot-item .btn-sm {
                width: 100%;
                text-align: center;
                justify-content: center;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1a56db;
            --primary-dark: #1040b0;
            --primary-light: #e8f0fe;
            --primary-50: #eff6ff;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fef3c7;
            --bg: #f8fafc;
            --surface: #ffffff;
            --surface-alt: #f1f5f9;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(0, 0, 0, 0.05);
            --radius-xs: 4px;
            --radius-sm: 6px;
            --radius: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --sidebar-width: 250px;
            --header-height: 60px;
            --transition: 0.2s ease;
            --transition-slow: 0.35s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --section-gap: 64px;
            --section-gap-sm: 40px;
        }

        @media (max-width: 1199px) {
            :root {
                --sidebar-width: 220px;
                --section-gap: 48px;
                --section-gap-sm: 32px;
            }
        }

        @media (max-width: 991px) {
            :root {
                --sidebar-width: 0;
                --section-gap: 40px;
                --section-gap-sm: 28px;
            }
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            display: flex;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--surface);
            border-right: 1px solid var(--border);
            z-index: 1050;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-md);
            transition: transform var(--transition-slow), width var(--transition-slow);
            overflow-y: auto;
            overflow-x: hidden;
        }

        .sidebar-logo {
            padding: 20px 24px;
            border-bottom: 1px solid var(--border-light);
            flex-shrink: 0;
        }

        .sidebar-logo a {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }

        .sidebar-logo a:hover {
            color: var(--primary-dark);
        }

        .sidebar-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        .sidebar-nav {
            flex: 1;
            overflow-y: auto;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 16px;
            border-radius: var(--radius);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
            text-decoration: none;
        }

        .sidebar-nav a:hover {
            background: var(--primary-50);
            color: var(--primary);
        }

        .sidebar-nav a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: var(--shadow-md);
        }

        .sidebar-nav a .nav-icon {
            width: 20px;
            text-align: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-light);
            flex-shrink: 0;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .sidebar-footer .sidebar-cta {
            display: block;
            width: 100%;
            padding: 10px 16px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius);
            text-align: center;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
            text-decoration: none;
            margin-bottom: 10px;
        }

        .sidebar-footer .sidebar-cta:hover {
            background: var(--accent-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            transition: margin-left var(--transition-slow);
            width: calc(100% - var(--sidebar-width));
        }

        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            z-index: 1040;
            align-items: center;
            padding: 0 16px;
            box-shadow: var(--shadow-sm);
        }

        .mobile-header .menu-toggle {
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            padding: 8px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
        }

        .mobile-header .menu-toggle:hover {
            background: var(--surface-alt);
        }

        .mobile-header .mobile-logo {
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--primary);
            margin-left: 8px;
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1045;
            opacity: 0;
            transition: opacity var(--transition-slow);
        }

        .sidebar-overlay.active {
            display: block;
            opacity: 1;
        }

        @media (max-width: 991px) {
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
            }

            .sidebar.open {
                transform: translateX(0);
            }

            .sidebar-overlay.active {
                display: block;
            }

            .main-content {
                margin-left: 0;
                width: 100%;
            }

            .mobile-header {
                display: flex;
            }

            .main-content {
                padding-top: var(--header-height);
            }

            :root {
                --sidebar-width: 0;
            }
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 767px) {
            .container {
                padding: 0 16px;
            }
        }

        .section {
            padding: var(--section-gap) 0;
        }

        .section-sm {
            padding: var(--section-gap-sm) 0;
        }

        .section-alt {
            background: var(--surface-alt);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius);
            transition: all var(--transition);
            text-decoration: none;
            border: 2px solid transparent;
            white-space: nowrap;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }

        .btn-accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-md);
        }

        .btn-lg {
            padding: 14px 36px;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }

        .card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            height: 100%;
        }

        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--border);
        }

        .badge {
            display: inline-block;
            padding: 5px 14px;
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 50px;
            letter-spacing: 0.02em;
        }

        .badge-primary {
            background: var(--primary-light);
            color: var(--primary);
        }

        .badge-accent {
            background: var(--accent-light);
            color: var(--accent-dark);
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
            margin-bottom: 8px;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.6;
            max-width: 680px;
        }

        .section-header {
            margin-bottom: 40px;
        }

        .section-header.centered {
            text-align: center;
        }

        .section-header.centered .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        @media (max-width: 767px) {
            .section-title {
                font-size: 1.6rem;
            }

            .section-subtitle {
                font-size: 0.95rem;
            }

            .section-header {
                margin-bottom: 28px;
            }
        }

        .hero-section {
            position: relative;
            padding: 60px 0;
            background: linear-gradient(135deg, #f0f4ff 0%, #e8f0fe 30%, #f8fafc 100%);
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(26, 86, 219, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -40px;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-text h1 {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--text);
            letter-spacing: -0.03em;
            margin-bottom: 16px;
            line-height: 1.25;
        }

        .hero-text .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 24px;
        }

        .hero-whitepaper {
            background: var(--surface);
            border-radius: var(--radius-xl);
            padding: 32px;
            box-shadow: var(--shadow-xl);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .hero-whitepaper .wp-cover {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow);
        }

        .hero-whitepaper .wp-toc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .hero-whitepaper .wp-toc strong {
            color: var(--text);
            display: block;
            margin-bottom: 6px;
            font-size: 0.95rem;
        }

        .hero-whitepaper .wp-toc ul {
            list-style: none;
            padding: 0;
        }

        .hero-whitepaper .wp-toc ul li {
            padding: 3px 0;
            padding-left: 16px;
            position: relative;
        }

        .hero-whitepaper .wp-toc ul li::before {
            content: '•';
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: bold;
        }

        .hero-form {
            background: var(--surface);
            border-radius: var(--radius-xl);
            padding: 32px;
            box-shadow: var(--shadow-xl);
            border: 1px solid var(--border-light);
        }

        .hero-form h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text);
        }

        .hero-form .form-subtitle {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .hero-form .form-control {
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 11px 14px;
            font-size: 0.9rem;
            transition: all var(--transition);
            background: var(--surface);
        }

        .hero-form .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
            outline: none;
        }

        .hero-form .form-label {
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--text);
            margin-bottom: 4px;
        }

        @media (max-width: 991px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .hero-text h1 {
                font-size: 2rem;
            }

            .hero-section {
                padding: 40px 0;
                min-height: auto;
            }
        }

        @media (max-width: 767px) {
            .hero-text h1 {
                font-size: 1.7rem;
            }

            .hero-whitepaper {
                padding: 20px;
            }

            .hero-form {
                padding: 20px;
            }

            .hero-section {
                padding: 28px 0;
            }
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .metric-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .metric-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }

        .metric-card .metric-number {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--primary);
            letter-spacing: -0.03em;
            line-height: 1;
            margin-bottom: 8px;
        }

        .metric-card .metric-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .metric-card .metric-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 10px;
        }

        @media (max-width: 991px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }

        @media (max-width: 520px) {
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .metric-card {
                padding: 20px 16px;
            }

            .metric-card .metric-number {
                font-size: 2rem;
            }
        }

        .service-matrix-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .service-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            text-align: center;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .service-card:hover {
            box-shadow: var(--shadow-xl);
            transform: translateY(-4px);
            border-color: var(--primary-light);
        }

        .service-card .service-icon {
            width: 56px;
            height: 56px;
            background: var(--primary-50);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.5rem;
            color: var(--primary);
            flex-shrink: 0;
        }

        .service-card h4 {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--text);
        }

        .service-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }

        @media (max-width: 991px) {
            .service-matrix-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }

        @media (max-width: 600px) {
            .service-matrix-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        .comparison-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: stretch;
        }

        .comparison-card {
            background: var(--surface);
            border-radius: var(--radius-xl);
            padding: 36px 32px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-light);
            position: relative;
            overflow: hidden;
        }

        .comparison-card.before {
            border-left: 4px solid #ef4444;
        }

        .comparison-card.after {
            border-left: 4px solid #10b981;
            background: linear-gradient(135deg, #f0fdf4 0%, #ffffff 100%);
        }

        .comparison-card h4 {
            font-weight: 700;
            font-size: 1.15rem;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .comparison-card ul {
            list-style: none;
            padding: 0;
        }

        .comparison-card ul li {
            padding: 8px 0;
            padding-left: 24px;
            position: relative;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.6;
            border-bottom: 1px solid var(--border-light);
        }

        .comparison-card ul li:last-child {
            border-bottom: none;
        }

        .comparison-card ul li::before {
            position: absolute;
            left: 0;
            font-weight: bold;
            font-size: 0.85rem;
        }

        .comparison-card.before ul li::before {
            content: '✕';
            color: #ef4444;
        }

        .comparison-card.after ul li::before {
            content: '✓';
            color: #10b981;
        }

        @media (max-width: 767px) {
            .comparison-block {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .comparison-card {
                padding: 24px 20px;
            }
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
            position: relative;
        }

        .process-step {
            text-align: center;
            position: relative;
            padding-top: 48px;
        }

        .process-step .step-number {
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1rem;
            z-index: 2;
            box-shadow: var(--shadow-md);
        }

        .process-step::before {
            content: '';
            position: absolute;
            top: 19px;
            left: 70%;
            width: 60%;
            height: 2px;
            background: var(--border);
            z-index: 1;
        }

        .process-step:last-child::before {
            display: none;
        }

        .process-step h5 {
            font-weight: 700;
            font-size: 0.95rem;
            margin-bottom: 4px;
            color: var(--text);
        }

        .process-step p {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.4;
        }

        @media (max-width: 991px) {
            .process-steps {
                grid-template-columns: repeat(3, 1fr);
                gap: 20px;
            }

            .process-step:nth-child(3)::before {
                display: none;
            }

            .process-step::before {
                left: 60%;
                width: 80%;
            }
        }

        @media (max-width: 600px) {
            .process-steps {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

            .process-step:nth-child(even)::before {
                display: none;
            }
        }

        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .scenario-item {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            display: flex;
            gap: 16px;
            align-items: flex-start;
            transition: all var(--transition);
        }

        .scenario-item:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }

        .scenario-item .scenario-icon {
            width: 44px;
            height: 44px;
            background: var(--primary-50);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 1.2rem;
            color: var(--primary);
        }

        .scenario-item h4 {
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 4px;
            color: var(--text);
        }

        .scenario-item p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
            margin: 0;
        }

        @media (max-width: 767px) {
            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow);
        }

        .faq-question {
            width: 100%;
            padding: 18px 24px;
            background: none;
            border: none;
            text-align: left;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            gap: 12px;
            transition: all var(--transition);
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            transition: transform var(--transition);
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 24px 18px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .cta-section {
            background: linear-gradient(135deg, #1a3a6e 0%, #1a56db 40%, #1040b0 100%);
            color: #fff;
            padding: 56px 0;
            border-radius: var(--radius-2xl);
            margin: 0 24px;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-inner {
            text-align: center;
            position: relative;
            z-index: 1;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .cta-inner p {
            font-size: 1.05rem;
            opacity: 0.9;
            margin-bottom: 28px;
            line-height: 1.6;
        }

        .cta-inner .btn {
            font-size: 1rem;
            padding: 14px 36px;
            border-radius: var(--radius-md);
            font-weight: 700;
        }

        .cta-inner .btn-accent {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }

        .cta-inner .btn-accent:hover {
            background: #f0f4ff;
            border-color: #f0f4ff;
            color: var(--primary-dark);
            box-shadow: 0 8px 30px rgba(255, 255, 255, 0.25);
            transform: translateY(-2px);
        }

        @media (max-width: 767px) {
            .cta-section {
                margin: 0 12px;
                padding: 40px 20px;
                border-radius: var(--radius-lg);
            }

            .cta-inner h2 {
                font-size: 1.5rem;
            }
        }

        .site-footer {
            background: var(--text);
            color: #cbd5e1;
            padding: 48px 0 24px;
            margin-top: 0;
            font-size: 0.9rem;
        }

        .site-footer h4 {
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 14px;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 32px;
        }

        .site-footer .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer .footer-col ul li {
            padding: 4px 0;
        }

        .site-footer .footer-col ul li a {
            color: #cbd5e1;
            text-decoration: none;
            transition: color var(--transition);
            font-size: 0.85rem;
        }

        .site-footer .footer-col ul li a:hover {
            color: #fff;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
            color: #94a3b8;
        }

        .site-footer .footer-bottom a {
            color: #94a3b8;
            text-decoration: none;
            transition: color var(--transition);
        }

        .site-footer .footer-bottom a:hover {
            color: #fff;
        }

        .site-footer .footer-bottom span {
            white-space: nowrap;
        }

        @media (max-width: 767px) {
            .site-footer .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }

            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
        }

        @media (max-width: 480px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        .testimonial-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            position: relative;
        }

        .testimonial-card .quote-icon {
            font-size: 2.5rem;
            color: var(--primary-light);
            position: absolute;
            top: 16px;
            left: 20px;
            opacity: 0.6;
            line-height: 1;
        }

        .testimonial-card .testimonial-text {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            padding-left: 20px;
            margin-bottom: 16px;
            font-style: italic;
        }

        .testimonial-card .testimonial-author {
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--text);
            padding-left: 20px;
        }

        .testimonial-card .testimonial-role {
            font-size: 0.8rem;
            color: var(--text-muted);
            padding-left: 20px;
        }

        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        @media (max-width: 991px) {
            .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }

        @media (max-width: 600px) {
            .testimonials-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        .highlight-box {
            background: var(--primary-50);
            border-left: 4px solid var(--primary);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            padding: 20px 24px;
            margin: 20px 0;
        }

        .highlight-box p {
            margin: 0;
            font-size: 0.95rem;
            color: var(--text);
            line-height: 1.6;
        }

        .text-accent {
            color: var(--accent-dark);
        }

        .fw-800 {
            font-weight: 800;
        }

        .fw-900 {
            font-weight: 900;
        }

/* roulang page: category2 */
:root {
            --primary: #1a56db;
            --primary-dark: #1040b0;
            --primary-light: #e8f0fe;
            --primary-50: #eff6ff;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fef3c7;
            --bg: #f8fafc;
            --surface: #ffffff;
            --surface-alt: #f1f5f9;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(0, 0, 0, 0.05);
            --radius-xs: 4px;
            --radius-sm: 6px;
            --radius: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --sidebar-width: 250px;
            --header-height: 60px;
            --transition: 0.2s ease;
            --transition-slow: 0.35s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --section-gap: 64px;
            --section-gap-sm: 40px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            display: flex;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        /* Sidebar */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--surface);
            border-right: 1px solid var(--border);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-md);
            transition: transform var(--transition-slow);
        }

        .sidebar-logo {
            padding: 20px 24px;
            border-bottom: 1px solid var(--border-light);
            flex-shrink: 0;
        }

        .sidebar-logo a {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .sidebar-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        .sidebar-nav {
            flex: 1;
            overflow-y: auto;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 16px;
            border-radius: var(--radius);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }

        .sidebar-nav a:hover {
            background: var(--primary-50);
            color: var(--primary);
        }

        .sidebar-nav a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: var(--shadow-md);
        }

        .sidebar-nav a .nav-icon {
            width: 20px;
            text-align: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-light);
            flex-shrink: 0;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .sidebar-footer .sidebar-cta {
            display: block;
            width: 100%;
            padding: 10px 16px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 0.9rem;
            text-align: center;
            transition: all var(--transition);
            margin-bottom: 8px;
        }

        .sidebar-footer .sidebar-cta:hover {
            background: var(--accent-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
        }

        /* Mobile Header */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 56px;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            z-index: 999;
            align-items: center;
            padding: 0 16px;
            box-shadow: var(--shadow-sm);
        }

        .mobile-header .mobile-logo {
            font-weight: 800;
            color: var(--primary);
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-header .mobile-logo .logo-icon {
            width: 30px;
            height: 30px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 0.9rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        .mobile-header .hamburger {
            margin-left: auto;
            background: none;
            font-size: 1.3rem;
            color: var(--text);
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }

        .mobile-header .hamburger:hover {
            background: var(--surface-alt);
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 998;
        }

        .sidebar-overlay.active {
            display: block;
        }

        /* Main Content */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            padding-top: 0;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-wide {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-narrow {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Hero Section - 沉浸暗底 */
        .hero-dark {
            position: relative;
            min-height: 580px;
            display: flex;
            align-items: center;
            background: #0a0f1e;
            background-image: linear-gradient(135deg, rgba(10, 15, 30, 0.92) 0%, rgba(15, 25, 55, 0.85) 40%, rgba(8, 18, 40, 0.9) 100%), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
            padding: 80px 0;
        }

        .hero-dark::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(26, 86, 219, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-dark::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-dark .hero-inner {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            gap: 48px;
            flex-wrap: wrap;
        }

        .hero-dark .hero-text {
            flex: 1;
            min-width: 300px;
        }

        .hero-dark .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(245, 158, 11, 0.2);
            border: 1px solid rgba(245, 158, 11, 0.4);
            color: #fbbf24;
            padding: 6px 14px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: 0.03em;
        }

        .hero-dark .hero-badge .badge-dot {
            width: 8px;
            height: 8px;
            background: #f59e0b;
            border-radius: 50%;
            animation: pulse-dot 1.8s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.6);
            }
            50% {
                box-shadow: 0 0 0 10px rgba(245, 158, 11, 0);
            }
        }

        .hero-dark h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.2;
            letter-spacing: -0.03em;
            margin-bottom: 16px;
        }

        .hero-dark h1 .highlight {
            color: #f59e0b;
            position: relative;
        }

        .hero-dark .hero-subtitle {
            font-size: 1.15rem;
            color: #cbd5e1;
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 540px;
        }

        .hero-dark .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            text-align: center;
            letter-spacing: 0.01em;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-md);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: var(--shadow-lg);
            transform: translateY(-1px);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: var(--shadow-md);
        }

        .btn-accent:hover {
            background: var(--accent-dark);
            color: #fff;
            box-shadow: var(--shadow-lg);
            transform: translateY(-1px);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.5);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: #fff;
            color: #fff;
            box-shadow: var(--shadow-lg);
        }

        .btn-lg {
            padding: 15px 34px;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
        }

        .hero-dark .hero-stats-row {
            flex: 0 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
            min-width: 200px;
        }

        .hero-dark .hero-stat-card {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            padding: 20px 24px;
            color: #fff;
            text-align: center;
            min-width: 150px;
            transition: all var(--transition);
        }

        .hero-dark .hero-stat-card:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.25);
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
        }

        .hero-dark .hero-stat-card .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: #f59e0b;
            letter-spacing: -0.02em;
            line-height: 1;
        }

        .hero-dark .hero-stat-card .stat-label {
            font-size: 0.85rem;
            color: #94a3b8;
            margin-top: 6px;
        }

        /* Section Common */
        .section {
            padding: var(--section-gap) 0;
        }

        .section-sm {
            padding: var(--section-gap-sm) 0;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--primary);
            background: var(--primary-50);
            padding: 5px 14px;
            border-radius: 50px;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 650px;
            line-height: 1.7;
        }

        .section-header {
            margin-bottom: 40px;
        }

        .section-header.centered {
            text-align: center;
        }

        .section-header.centered .section-subtitle {
            margin: 0 auto;
        }

        /* KPI Dashboard */
        .kpi-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .kpi-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .kpi-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: var(--primary-light);
        }

        .kpi-card .kpi-icon {
            width: 48px;
            height: 48px;
            background: var(--primary-50);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 1.3rem;
            color: var(--primary);
        }

        .kpi-card .kpi-value {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
            line-height: 1;
        }

        .kpi-card .kpi-value .kpi-unit {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-muted);
        }

        .kpi-card .kpi-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        .kpi-card .kpi-trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.8rem;
            font-weight: 600;
            color: #10b981;
            margin-top: 8px;
        }

        .kpi-card.featured {
            border-left: 4px solid var(--primary);
            background: linear-gradient(135deg, #ffffff 0%, #f8faff 100%);
        }

        /* Service Matrix */
        .service-matrix {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .service-card {
            background: var(--surface);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .service-card:hover {
            box-shadow: var(--shadow-xl);
            transform: translateY(-3px);
            border-color: var(--primary-light);
        }

        .service-card .card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .service-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .service-card:hover .card-img img {
            transform: scale(1.04);
        }

        .service-card .card-img .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--primary);
            color: #fff;
            padding: 5px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.03em;
        }

        .service-card .card-body {
            padding: 22px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .service-card .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .service-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
        }

        .service-card .card-body .card-link {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }

        .service-card .card-body .card-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* Before-After Comparison */
        .comparison-panel {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            background: var(--surface);
            border-radius: var(--radius-2xl);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-light);
        }

        .comparison-panel .comp-side {
            padding: 40px 32px;
            position: relative;
        }

        .comparison-panel .comp-side.before {
            background: #fef2f2;
            border-right: 1px dashed #fecaca;
        }

        .comparison-panel .comp-side.after {
            background: #f0fdf4;
        }

        .comparison-panel .comp-side .comp-label {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.8rem;
            letter-spacing: 0.05em;
            margin-bottom: 16px;
        }

        .comparison-panel .comp-side.before .comp-label {
            background: #fee2e2;
            color: #dc2626;
        }

        .comparison-panel .comp-side.after .comp-label {
            background: #dcfce7;
            color: #16a34a;
        }

        .comparison-panel .comp-side h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text);
        }

        .comparison-panel .comp-side ul {
            list-style: none;
            padding: 0;
        }

        .comparison-panel .comp-side ul li {
            padding: 8px 0;
            font-size: 0.95rem;
            color: var(--text-secondary);
            display: flex;
            align-items: flex-start;
            gap: 10px;
            line-height: 1.5;
        }

        .comparison-panel .comp-side.before ul li::before {
            content: '\f00d';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: #dc2626;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .comparison-panel .comp-side.after ul li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: #16a34a;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .comparison-divider {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0;
            position: relative;
        }

        .comparison-divider .divider-icon {
            width: 50px;
            height: 50px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            position: absolute;
            z-index: 2;
            box-shadow: var(--shadow-md);
        }

        /* Capability Model */
        .capability-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .capability-item {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            display: flex;
            gap: 16px;
            align-items: flex-start;
            transition: all var(--transition);
        }

        .capability-item:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
            transform: translateY(-1px);
        }

        .capability-item .cap-icon {
            width: 44px;
            height: 44px;
            background: var(--primary-50);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 1.1rem;
            color: var(--primary);
        }

        .capability-item .cap-info h4 {
            font-weight: 700;
            font-size: 1rem;
            color: var(--text);
            margin-bottom: 4px;
        }

        .capability-item .cap-info p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* Process Steps */
        .process-flow {
            display: flex;
            gap: 0;
            align-items: stretch;
            flex-wrap: nowrap;
            overflow-x: auto;
            padding: 10px 0;
        }

        .process-step {
            flex: 1;
            min-width: 180px;
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            position: relative;
            transition: all var(--transition);
        }

        .process-step:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: var(--primary-light);
        }

        .process-step .step-number {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            margin: 0 auto 14px;
            box-shadow: var(--shadow-md);
        }

        .process-step h4 {
            font-weight: 700;
            font-size: 1rem;
            color: var(--text);
            margin-bottom: 6px;
        }

        .process-step p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .process-connector {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            width: 40px;
            color: var(--primary);
            font-size: 1.2rem;
            opacity: 0.5;
        }

        /* Case Cards */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .case-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .case-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }

        .case-card .case-industry {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 8px;
        }

        .case-card h4 {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text);
            margin-bottom: 8px;
        }

        .case-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.5;
            margin-bottom: 12px;
        }

        .case-card .case-metric {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: -0.02em;
        }

        .case-card .case-metric span {
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-muted);
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--surface);
            border-radius: var(--radius-lg);
            margin-bottom: 12px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow);
        }

        .faq-item .faq-question {
            padding: 18px 24px;
            font-weight: 700;
            font-size: 1rem;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            background: none;
            width: 100%;
            text-align: left;
            transition: color var(--transition);
        }

        .faq-item .faq-question:hover {
            color: var(--primary);
        }

        .faq-item .faq-question .faq-icon {
            flex-shrink: 0;
            transition: transform var(--transition);
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .faq-item .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            color: var(--primary);
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
            border-radius: var(--radius-2xl);
            padding: 56px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-xl);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -15%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(26, 86, 219, 0.2) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section .cta-inner {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: #cbd5e1;
            margin-bottom: 28px;
            max-width: 550px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-section .cta-form-inline {
            display: flex;
            gap: 10px;
            max-width: 500px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }

        .cta-section .cta-form-inline input {
            flex: 1;
            min-width: 200px;
            padding: 14px 18px;
            border-radius: var(--radius);
            border: 2px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            font-size: 0.95rem;
            outline: none;
            transition: all var(--transition);
        }

        .cta-section .cta-form-inline input::placeholder {
            color: #94a3b8;
        }

        .cta-section .cta-form-inline input:focus {
            border-color: var(--primary);
            background: rgba(255, 255, 255, 0.14);
            box-shadow: 0 0 0 4px rgba(26, 86, 219, 0.2);
        }

        /* Footer */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 48px 0 24px;
            margin-top: var(--section-gap);
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 32px;
        }

        .site-footer .footer-col h4 {
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 14px;
            letter-spacing: 0.01em;
        }

        .site-footer .footer-col ul {
            list-style: none;
            padding: 0;
        }

        .site-footer .footer-col ul li {
            margin-bottom: 8px;
        }

        .site-footer .footer-col ul li a {
            color: #94a3b8;
            font-size: 0.9rem;
            transition: color var(--transition);
        }

        .site-footer .footer-col ul li a:hover {
            color: #fff;
        }

        .site-footer .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: space-between;
            align-items: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.8rem;
            color: #64748b;
        }

        .site-footer .footer-bottom a {
            color: #94a3b8;
            font-size: 0.8rem;
        }

        .site-footer .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1200px) {
            :root {
                --sidebar-width: 220px;
                --section-gap: 48px;
                --section-gap-sm: 32px;
            }
            .hero-dark h1 {
                font-size: 2.5rem;
            }
            .kpi-grid {
                grid-template-columns: repeat(4, 1fr);
                gap: 14px;
            }
            .kpi-card .kpi-value {
                font-size: 1.8rem;
            }
            .service-matrix {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
            .case-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-flow {
                flex-wrap: wrap;
            }
            .process-connector {
                width: 100%;
                transform: rotate(90deg);
                padding: 8px 0;
            }
        }

        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 0;
                --section-gap: 40px;
                --section-gap-sm: 28px;
            }
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 56px;
            }
            .hero-dark {
                min-height: 420px;
                padding: 60px 0;
            }
            .hero-dark h1 {
                font-size: 2rem;
            }
            .hero-dark .hero-stats-row {
                flex-direction: row;
                flex-wrap: wrap;
                gap: 10px;
            }
            .hero-dark .hero-stat-card {
                flex: 1;
                min-width: 120px;
                padding: 14px 16px;
            }
            .hero-dark .hero-stat-card .stat-number {
                font-size: 1.5rem;
            }
            .kpi-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-matrix {
                grid-template-columns: repeat(2, 1fr);
            }
            .comparison-panel {
                grid-template-columns: 1fr;
            }
            .comparison-panel .comp-side.before {
                border-right: none;
                border-bottom: 1px dashed #fecaca;
            }
            .capability-grid {
                grid-template-columns: 1fr;
            }
            .case-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .section-title {
                font-size: 1.7rem;
            }
            .cta-section {
                padding: 36px 24px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 768px) {
            .hero-dark {
                min-height: 360px;
                padding: 48px 0;
            }
            .hero-dark h1 {
                font-size: 1.7rem;
            }
            .hero-dark .hero-subtitle {
                font-size: 0.95rem;
            }
            .hero-dark .hero-inner {
                flex-direction: column;
                gap: 24px;
            }
            .hero-dark .hero-stats-row {
                flex-direction: row;
                width: 100%;
                gap: 8px;
            }
            .hero-dark .hero-stat-card {
                padding: 12px 10px;
                min-width: 80px;
            }
            .hero-dark .hero-stat-card .stat-number {
                font-size: 1.3rem;
            }
            .hero-dark .hero-stat-card .stat-label {
                font-size: 0.7rem;
            }
            .kpi-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .kpi-card {
                padding: 18px 14px;
            }
            .kpi-card .kpi-value {
                font-size: 1.5rem;
            }
            .service-matrix {
                grid-template-columns: 1fr;
            }
            .case-grid {
                grid-template-columns: 1fr;
            }
            .process-flow {
                flex-direction: column;
            }
            .process-connector {
                width: 100%;
                transform: rotate(90deg);
                padding: 4px 0;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 6px;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .btn-lg {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .comparison-panel .comp-side {
                padding: 24px 18px;
            }
            .cta-section {
                border-radius: var(--radius-lg);
                padding: 28px 18px;
            }
            .container {
                padding: 0 14px;
            }
            .container-wide {
                padding: 0 14px;
            }
            .container-narrow {
                padding: 0 14px;
            }
        }

        @media (max-width: 520px) {
            .hero-dark h1 {
                font-size: 1.4rem;
            }
            .hero-dark .hero-stats-row {
                gap: 6px;
            }
            .hero-dark .hero-stat-card {
                padding: 10px 8px;
                min-width: 65px;
                border-radius: var(--radius);
            }
            .hero-dark .hero-stat-card .stat-number {
                font-size: 1.1rem;
            }
            .hero-dark .hero-stat-card .stat-label {
                font-size: 0.65rem;
            }
            .kpi-grid {
                grid-template-columns: 1fr;
            }
            .hero-dark .hero-actions {
                flex-direction: column;
            }
            .hero-dark .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
            }
            .cta-section .cta-form-inline {
                flex-direction: column;
            }
            .cta-section .cta-form-inline input {
                width: 100%;
            }
            .cta-section .cta-form-inline .btn {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #1a56db;
            --primary-dark: #1040b0;
            --primary-light: #e8f0fe;
            --primary-50: #eff6ff;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fef3c7;
            --bg: #f8fafc;
            --surface: #ffffff;
            --surface-alt: #f1f5f9;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(0, 0, 0, 0.05);
            --radius-xs: 4px;
            --radius-sm: 6px;
            --radius: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --sidebar-width: 250px;
            --header-height: 60px;
            --transition: 0.2s ease;
            --transition-slow: 0.35s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --section-gap: 64px;
            --section-gap-sm: 40px;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            display: flex;
            min-height: 100vh;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        /* Sidebar */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--surface);
            border-right: 1px solid var(--border);
            z-index: 1050;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-md);
            transition: transform var(--transition-slow);
        }
        .sidebar-logo {
            padding: 20px 24px;
            border-bottom: 1px solid var(--border-light);
            flex-shrink: 0;
        }
        .sidebar-logo a {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }
        .sidebar-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .sidebar-nav {
            flex: 1;
            overflow-y: auto;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 16px;
            border-radius: var(--radius);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
            text-decoration: none;
        }
        .sidebar-nav a:hover {
            background: var(--primary-50);
            color: var(--primary);
        }
        .sidebar-nav a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: var(--shadow-md);
        }
        .sidebar-nav a .nav-icon {
            width: 20px;
            text-align: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-light);
            flex-shrink: 0;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .sidebar-footer .sidebar-cta {
            display: block;
            width: 100%;
            padding: 10px 16px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 0.9rem;
            text-align: center;
            transition: all var(--transition);
            text-decoration: none;
            margin-bottom: 8px;
        }
        .sidebar-footer .sidebar-cta:hover {
            background: var(--accent-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
        }

        /* Mobile Toggle */
        .mobile-toggle {
            display: none;
            position: fixed;
            top: 12px;
            left: 12px;
            z-index: 1100;
            background: var(--primary);
            color: #fff;
            width: 40px;
            height: 40px;
            border-radius: var(--radius);
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: var(--shadow-lg);
            border: none;
            cursor: pointer;
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1040;
        }
        .sidebar-overlay.show {
            display: block;
        }

        /* Main Content */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            padding: 0;
            transition: margin-left var(--transition-slow);
        }

        /* Section spacing */
        .section {
            padding: var(--section-gap) 0;
        }
        .section-sm {
            padding: var(--section-gap-sm) 0;
        }

        /* Custom container */
        .custom-container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Hero Bento */
        .hero-bento {
            background: linear-gradient(135deg, #f0f4ff 0%, #e8f0fe 40%, #f8fafc 100%);
            position: relative;
            overflow: hidden;
            padding: 60px 0 50px;
        }
        .hero-bento::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(26, 86, 219, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-bento .bento-grid {
            display: grid;
            grid-template-columns: 1.3fr 0.7fr;
            grid-template-rows: auto auto;
            gap: 20px;
            align-items: stretch;
        }
        .hero-bento .bento-main {
            grid-row: 1 / 3;
            background: var(--surface);
            border-radius: var(--radius-xl);
            padding: 40px 36px;
            box-shadow: var(--shadow-lg);
            display: flex;
            flex-direction: column;
            justify-content: center;
            position: relative;
            overflow: hidden;
            z-index: 1;
        }
        .hero-bento .bento-main .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-50);
            color: var(--primary);
            font-weight: 600;
            font-size: 0.85rem;
            padding: 6px 14px;
            border-radius: 50px;
            margin-bottom: 18px;
            width: fit-content;
        }
        .hero-bento .bento-main h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: -0.02em;
        }
        .hero-bento .bento-main h1 span {
            color: var(--primary);
        }
        .hero-bento .bento-main .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 24px;
            max-width: 520px;
        }
        .hero-bento .bento-main .hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .hero-bento .bento-mini {
            background: var(--surface);
            border-radius: var(--radius-xl);
            padding: 24px 22px;
            box-shadow: var(--shadow-md);
            display: flex;
            flex-direction: column;
            justify-content: center;
            transition: all var(--transition);
            position: relative;
            z-index: 1;
        }
        .hero-bento .bento-mini:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        .hero-bento .bento-mini .mini-icon {
            width: 44px;
            height: 44px;
            background: var(--primary-50);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.2rem;
            margin-bottom: 12px;
        }
        .hero-bento .bento-mini h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 4px;
        }
        .hero-bento .bento-mini p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.5;
        }
        .hero-bento .bento-cta-strip {
            grid-column: 1 / -1;
            background: var(--primary);
            border-radius: var(--radius-lg);
            padding: 18px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            box-shadow: var(--shadow-lg);
            z-index: 1;
        }
        .hero-bento .bento-cta-strip span {
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
        }
        .hero-bento .bento-cta-strip .btn-cta-strip {
            background: #fff;
            color: var(--primary);
            font-weight: 700;
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 0.95rem;
            transition: all var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }
        .hero-bento .bento-cta-strip .btn-cta-strip:hover {
            background: var(--accent-light);
            color: var(--accent-dark);
            box-shadow: var(--shadow-md);
        }

        /* Section titles */
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 700;
            font-size: 0.85rem;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: -0.02em;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 650px;
            line-height: 1.7;
        }

        /* Metrics Dashboard */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .metric-card {
            background: var(--surface);
            border-radius: var(--radius-xl);
            padding: 28px 24px;
            box-shadow: var(--shadow);
            text-align: center;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            position: relative;
            overflow: hidden;
        }
        .metric-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--primary-light);
        }
        .metric-card .metric-icon {
            width: 48px;
            height: 48px;
            background: var(--primary-50);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            color: var(--primary);
            font-size: 1.3rem;
        }
        .metric-card .metric-value {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 6px;
            letter-spacing: -0.03em;
        }
        .metric-card .metric-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .metric-card .metric-trend {
            font-size: 0.8rem;
            color: #10b981;
            font-weight: 600;
            margin-top: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 3px;
        }

        /* Service Matrix */
        .service-matrix-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .service-card {
            background: var(--surface);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .service-card:hover {
            box-shadow: var(--shadow-xl);
            transform: translateY(-4px);
            border-color: var(--primary-light);
        }
        .service-card .card-img-wrap {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .service-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .service-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }
        .service-card .card-body-custom {
            padding: 22px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .service-card .card-body-custom h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .service-card .card-body-custom p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
        }
        .service-card .card-body-custom .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-bottom: 12px;
        }
        .service-card .card-body-custom .card-tags span {
            background: var(--surface-alt);
            color: var(--text-secondary);
            font-size: 0.78rem;
            padding: 4px 10px;
            border-radius: 50px;
            font-weight: 500;
        }
        .service-card .card-body-custom .btn-card {
            align-self: flex-start;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            transition: all var(--transition);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .service-card .card-body-custom .btn-card:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
        }

        /* Comparison */
        .comparison-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            align-items: start;
        }
        .comparison-card {
            background: var(--surface);
            border-radius: var(--radius-xl);
            padding: 32px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        .comparison-card.before-card {
            border-left: 4px solid #ef4444;
        }
        .comparison-card.after-card {
            border-left: 4px solid #10b981;
        }
        .comparison-card h4 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .comparison-card.before-card h4 {
            color: #ef4444;
        }
        .comparison-card.after-card h4 {
            color: #10b981;
        }
        .comparison-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .comparison-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.95rem;
            color: var(--text-secondary);
            display: flex;
            align-items: flex-start;
            gap: 8px;
            line-height: 1.5;
        }
        .comparison-card ul li:last-child {
            border-bottom: none;
        }
        .comparison-card ul li i {
            margin-top: 3px;
            flex-shrink: 0;
        }
        .comparison-card.before-card ul li i {
            color: #ef4444;
        }
        .comparison-card.after-card ul li i {
            color: #10b981;
        }

        /* Coach System */
        .coach-system-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .coach-system-card {
            background: var(--surface);
            border-radius: var(--radius-xl);
            padding: 28px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            text-align: center;
            transition: all var(--transition);
        }
        .coach-system-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .coach-system-card .system-num {
            width: 52px;
            height: 52px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 800;
            margin: 0 auto 16px;
        }
        .coach-system-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .coach-system-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* Scenario */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .scenario-item {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 22px 20px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .scenario-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .scenario-item .scenario-icon {
            width: 46px;
            height: 46px;
            background: var(--primary-50);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .scenario-item .scenario-info h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 4px;
        }
        .scenario-item .scenario-info p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.5;
        }

        /* Cases */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .case-card {
            background: var(--surface);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .case-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .case-card .case-img {
            height: 180px;
            overflow: hidden;
        }
        .case-card .case-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .case-card .case-body {
            padding: 18px 16px;
        }
        .case-card .case-body h5 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }
        .case-card .case-body p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
            margin: 0;
        }
        .case-card .case-body .case-stat {
            font-weight: 700;
            color: var(--primary);
            font-size: 1.3rem;
            margin-top: 8px;
            display: block;
        }

        /* Process */
        .process-timeline {
            display: flex;
            gap: 0;
            position: relative;
            justify-content: space-between;
            flex-wrap: nowrap;
        }
        .process-timeline::before {
            content: '';
            position: absolute;
            top: 28px;
            left: 10%;
            right: 10%;
            height: 3px;
            background: var(--primary-light);
            z-index: 0;
        }
        .process-step {
            text-align: center;
            flex: 1;
            position: relative;
            z-index: 1;
            min-width: 100px;
        }
        .process-step .step-circle {
            width: 56px;
            height: 56px;
            background: var(--surface);
            border: 3px solid var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--primary);
            margin: 0 auto 14px;
            transition: all var(--transition);
        }
        .process-step:hover .step-circle {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-lg);
        }
        .process-step h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 4px;
        }
        .process-step p {
            font-size: 0.8rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.4;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--surface);
            border-radius: var(--radius-lg);
            margin-bottom: 12px;
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-item .faq-question {
            padding: 18px 22px;
            font-weight: 700;
            font-size: 1rem;
            color: var(--text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: transparent;
            width: 100%;
            text-align: left;
            border: none;
            transition: background var(--transition);
        }
        .faq-item .faq-question:hover {
            background: var(--surface-alt);
        }
        .faq-item .faq-question i {
            transition: transform var(--transition);
            color: var(--primary);
            font-size: 0.9rem;
        }
        .faq-item .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item .faq-answer.show {
            display: block;
        }

        /* CTA Form */
        .cta-form-section {
            background: linear-gradient(135deg, #1a3a7a 0%, #1a56db 60%, #2563eb 100%);
            border-radius: var(--radius-2xl);
            padding: 48px 40px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-form-section::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-form-section .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            position: relative;
            z-index: 1;
        }
        .cta-form-section .form-grid .full-width {
            grid-column: 1 / -1;
        }
        .cta-form-section input,
        .cta-form-section textarea,
        .cta-form-section select {
            width: 100%;
            padding: 12px 16px;
            border-radius: var(--radius);
            border: 2px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            font-size: 0.95rem;
            transition: all var(--transition);
            outline: none;
        }
        .cta-form-section input::placeholder,
        .cta-form-section textarea::placeholder {
            color: rgba(255, 255, 255, 0.65);
        }
        .cta-form-section input:focus,
        .cta-form-section textarea:focus,
        .cta-form-section select:focus {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.2);
            box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.1);
        }
        .cta-form-section select option {
            color: var(--text);
            background: #fff;
        }
        .cta-form-section .btn-submit {
            background: #fff;
            color: var(--primary);
            font-weight: 700;
            padding: 13px 32px;
            border-radius: 50px;
            font-size: 1rem;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            width: 100%;
            letter-spacing: 0.02em;
        }
        .cta-form-section .btn-submit:hover {
            background: var(--accent-light);
            color: var(--accent-dark);
            box-shadow: var(--shadow-xl);
            transform: translateY(-2px);
        }
        .cta-form-section .form-title {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 6px;
            position: relative;
            z-index: 1;
        }
        .cta-form-section .form-subtitle {
            font-size: 0.95rem;
            opacity: 0.85;
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
        }

        /* Footer */
        .site-footer {
            background: #1e293b;
            color: #cbd5e1;
            padding: 48px 0 20px;
            margin-top: 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-bottom: 32px;
        }
        .site-footer .footer-col h4 {
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 14px;
        }
        .site-footer .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 8px;
            font-size: 0.9rem;
        }
        .site-footer .footer-col ul li a {
            color: #94a3b8;
            text-decoration: none;
            transition: color var(--transition);
        }
        .site-footer .footer-col ul li a:hover {
            color: #fff;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 18px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: #94a3b8;
            justify-content: space-between;
            align-items: center;
        }
        .site-footer .footer-bottom a {
            color: #94a3b8;
            text-decoration: none;
            transition: color var(--transition);
        }
        .site-footer .footer-bottom a:hover {
            color: #fff;
        }

        /* Buttons */
        .btn-primary-custom {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            padding: 12px 26px;
            border-radius: 50px;
            font-size: 0.95rem;
            transition: all var(--transition);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            border: none;
            cursor: pointer;
        }
        .btn-primary-custom:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        .btn-outline-custom {
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            padding: 12px 26px;
            border-radius: 50px;
            font-size: 0.95rem;
            border: 2px solid var(--primary);
            transition: all var(--transition);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            cursor: pointer;
        }
        .btn-outline-custom:hover {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-md);
        }
        .btn-accent-custom {
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            padding: 12px 26px;
            border-radius: 50px;
            font-size: 0.95rem;
            transition: all var(--transition);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            border: none;
            cursor: pointer;
        }
        .btn-accent-custom:hover {
            background: var(--accent-dark);
            color: #fff;
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }

        /* Responsive */
        @media (max-width: 1199px) {
            :root {
                --sidebar-width: 220px;
                --section-gap: 48px;
                --section-gap-sm: 32px;
            }
            .hero-bento .bento-grid {
                grid-template-columns: 1.2fr 0.8fr;
            }
            .hero-bento .bento-main h1 {
                font-size: 2rem;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-matrix-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cases-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .coach-system-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 991px) {
            :root {
                --sidebar-width: 0;
                --section-gap: 40px;
                --section-gap-sm: 28px;
            }
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-toggle {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 56px;
            }
            .hero-bento .bento-grid {
                grid-template-columns: 1fr;
                grid-template-rows: auto;
            }
            .hero-bento .bento-main {
                grid-row: auto;
            }
            .hero-bento .bento-cta-strip {
                grid-column: 1;
            }
            .hero-bento .bento-main h1 {
                font-size: 1.7rem;
            }
            .comparison-wrap {
                grid-template-columns: 1fr;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .process-timeline {
                flex-wrap: wrap;
                gap: 20px;
                justify-content: center;
            }
            .process-timeline::before {
                display: none;
            }
            .process-step {
                flex: 0 0 40%;
                min-width: 120px;
            }
            .cta-form-section .form-grid {
                grid-template-columns: 1fr;
            }
            .cta-form-section .form-grid .full-width {
                grid-column: 1;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 767px) {
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .metric-card {
                padding: 20px 14px;
            }
            .metric-card .metric-value {
                font-size: 1.8rem;
            }
            .service-matrix-grid {
                grid-template-columns: 1fr;
            }
            .cases-grid {
                grid-template-columns: 1fr;
            }
            .coach-system-grid {
                grid-template-columns: 1fr;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .hero-bento {
                padding: 30px 0 30px;
            }
            .hero-bento .bento-main {
                padding: 24px 18px;
            }
            .hero-bento .bento-main h1 {
                font-size: 1.4rem;
            }
            .hero-bento .bento-mini {
                padding: 18px 16px;
            }
            .hero-bento .bento-cta-strip {
                padding: 14px 18px;
                flex-direction: column;
                text-align: center;
            }
            .custom-container {
                padding: 0 14px;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .cta-form-section {
                padding: 28px 18px;
                border-radius: var(--radius-lg);
            }
            .process-step {
                flex: 0 0 80%;
            }
        }

        @media (max-width: 520px) {
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .hero-bento .bento-main h1 {
                font-size: 1.2rem;
            }
            .hero-bento .bento-main .hero-desc {
                font-size: 0.9rem;
            }
            .hero-bento .hero-actions {
                flex-direction: column;
            }
            .hero-bento .hero-actions .btn-primary-custom,
            .hero-bento .hero-actions .btn-outline-custom {
                width: 100%;
                justify-content: center;
            }
            .section-title {
                font-size: 1.2rem;
            }
            .section {
                padding: 28px 0;
            }
        }

/* roulang page: category5 */
:root {
            --primary: #1a56db;
            --primary-dark: #1040b0;
            --primary-light: #e8f0fe;
            --primary-50: #eff6ff;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fef3c7;
            --bg: #f8fafc;
            --surface: #ffffff;
            --surface-alt: #f1f5f9;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(0, 0, 0, 0.05);
            --radius-xs: 4px;
            --radius-sm: 6px;
            --radius: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --sidebar-width: 220px;
            --header-height: 60px;
            --transition: 0.2s ease;
            --transition-slow: 0.35s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --section-gap: 48px;
            --section-gap-sm: 32px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            display: flex;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        /* Sidebar */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--surface);
            border-right: 1px solid var(--border);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-md);
            transition: transform var(--transition-slow);
        }
        .sidebar-logo {
            padding: 20px 24px;
            border-bottom: 1px solid var(--border-light);
            flex-shrink: 0;
        }
        .sidebar-logo a {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .sidebar-nav {
            flex: 1;
            overflow-y: auto;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 16px;
            border-radius: var(--radius);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .sidebar-nav a:hover {
            background: var(--primary-50);
            color: var(--primary);
        }
        .sidebar-nav a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: var(--shadow-md);
        }
        .sidebar-nav a .nav-icon {
            width: 20px;
            text-align: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-light);
            flex-shrink: 0;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .sidebar-close {
            display: none;
            position: absolute;
            top: 12px;
            right: 12px;
            width: 32px;
            height: 32px;
            background: var(--surface-alt);
            border-radius: 50%;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: var(--text-secondary);
            cursor: pointer;
            z-index: 10;
        }

        /* Mobile menu toggle */
        .mobile-menu-toggle {
            display: none;
            position: fixed;
            top: 12px;
            left: 12px;
            z-index: 1100;
            width: 40px;
            height: 40px;
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--text);
            cursor: pointer;
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 999;
        }

        /* Main Content */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        /* Container */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Section spacing */
        .section {
            padding: var(--section-gap) 0;
        }
        .section-sm {
            padding: var(--section-gap-sm) 0;
        }
        .section-alt {
            background: var(--surface-alt);
        }
        .section-primary {
            background: var(--primary-50);
        }
        .section-dark {
            background: var(--text);
            color: #fff;
        }

        /* Section header */
        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .section-header .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 650px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .section-badge {
            display: inline-block;
            padding: 6px 14px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        /* Hero */
        .hero-section {
            padding: 60px 0 48px;
            background: var(--surface);
            position: relative;
            overflow: hidden;
        }
        .hero-section .hero-bg {
            position: absolute;
            top: 0;
            right: 0;
            width: 45%;
            height: 100%;
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            border-radius: 0 0 0 60px;
            z-index: 0;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .hero-text h1 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.03em;
            line-height: 1.25;
            margin-bottom: 16px;
        }
        .hero-text h1 span {
            color: var(--primary);
        }
        .hero-text .hero-pain-point {
            font-size: 1.15rem;
            color: var(--text-secondary);
            margin-bottom: 20px;
            line-height: 1.6;
            padding-left: 16px;
            border-left: 3px solid var(--accent);
            font-weight: 500;
        }
        .hero-text .hero-desc {
            font-size: 1rem;
            color: var(--text-muted);
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .hero-visual {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-xl);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .hero-visual .demo-metric {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            background: var(--surface-alt);
            border-radius: var(--radius);
            transition: all var(--transition);
        }
        .hero-visual .demo-metric:hover {
            background: var(--primary-50);
            transform: translateX(4px);
        }
        .hero-visual .demo-metric .metric-icon {
            width: 42px;
            height: 42px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .metric-icon.blue {
            background: #dbeafe;
            color: #1a56db;
        }
        .metric-icon.green {
            background: #dcfce7;
            color: #16a34a;
        }
        .metric-icon.amber {
            background: #fef3c7;
            color: #d97706;
        }
        .hero-visual .demo-metric .metric-info strong {
            display: block;
            font-size: 1.1rem;
            color: var(--text);
            font-weight: 700;
        }
        .hero-visual .demo-metric .metric-info span {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: var(--shadow);
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }

        /* Cards */
        .card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 28px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow);
            transition: all var(--transition);
            height: 100%;
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: var(--border);
        }
        .card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 16px;
            flex-shrink: 0;
        }
        .card-icon.blue {
            background: #dbeafe;
            color: #1a56db;
        }
        .card-icon.green {
            background: #dcfce7;
            color: #16a34a;
        }
        .card-icon.purple {
            background: #ede9fe;
            color: #7c3aed;
        }
        .card-icon.amber {
            background: #fef3c7;
            color: #d97706;
        }
        .card-icon.rose {
            background: #ffe4e6;
            color: #e11d48;
        }
        .card-icon.teal {
            background: #ccfbf1;
            color: #0d9488;
        }
        .card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }
        .card p {
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }
        .card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 14px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--primary);
            transition: gap var(--transition);
        }
        .card .card-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* Metrics dashboard */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .metric-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 24px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }
        .metric-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        .metric-card .metric-value {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            line-height: 1;
            margin-bottom: 6px;
        }
        .metric-card .metric-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .metric-card .metric-sub {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* Comparison */
        .comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            max-width: 900px;
            margin: 0 auto;
        }
        .comparison-col {
            border-radius: var(--radius-lg);
            padding: 28px;
            border: 2px solid var(--border-light);
        }
        .comparison-col.before {
            background: #fef2f2;
            border-color: #fecaca;
        }
        .comparison-col.after {
            background: #f0fdf4;
            border-color: #bbf7d0;
        }
        .comparison-col h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .comparison-col.before h3 {
            color: #dc2626;
        }
        .comparison-col.after h3 {
            color: #16a34a;
        }
        .comparison-col ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .comparison-col ul li {
            padding: 10px 14px;
            background: var(--surface);
            border-radius: var(--radius);
            font-size: 0.93rem;
            color: var(--text-secondary);
            display: flex;
            align-items: flex-start;
            gap: 8px;
            line-height: 1.5;
        }
        .comparison-col ul li i {
            margin-top: 3px;
            flex-shrink: 0;
        }
        .comparison-col.before ul li i {
            color: #ef4444;
        }
        .comparison-col.after ul li i {
            color: #22c55e;
        }

        /* Process */
        .process-list {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
            counter-reset: process;
        }
        .process-step {
            text-align: center;
            position: relative;
            padding: 20px 12px;
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow);
            transition: all var(--transition);
            counter-increment: process;
        }
        .process-step:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .process-step .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            margin: 0 auto 12px;
        }
        .process-step h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }
        .process-step p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
            margin: 0;
        }
        .process-connector {
            display: none;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            gap: 12px;
            user-select: none;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--surface-alt);
        }
        .faq-question i {
            transition: transform var(--transition);
            flex-shrink: 0;
            color: var(--text-muted);
            font-size: 0.8rem;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }
        .faq-answer p {
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* CTA Form */
        .cta-section {
            background: var(--primary);
            color: #fff;
            padding: 56px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 140px;
            height: 140px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            pointer-events: none;
        }
        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .cta-text h2 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .cta-text p {
            font-size: 1rem;
            opacity: 0.9;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .cta-form-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-xl);
            color: var(--text);
        }
        .cta-form-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--text);
        }
        .form-group {
            margin-bottom: 14px;
        }
        .form-group label {
            display: block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 4px;
        }
        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 11px 14px;
            border: 2px solid var(--border);
            border-radius: var(--radius);
            font-size: 0.95rem;
            color: var(--text);
            background: var(--surface);
            transition: border-color var(--transition);
            resize: vertical;
        }
        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
        }
        .form-submit {
            width: 100%;
            padding: 13px 20px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            letter-spacing: 0.01em;
        }
        .form-submit:hover {
            background: var(--primary-dark);
            box-shadow: var(--shadow-md);
        }

        /* Content block */
        .content-block {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 32px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow);
            line-height: 1.8;
        }
        .content-block h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .content-block p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 12px;
            line-height: 1.8;
        }
        .content-block p:last-child {
            margin-bottom: 0;
        }
        .content-block ul {
            padding-left: 20px;
            margin-bottom: 12px;
        }
        .content-block ul li {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 6px;
            line-height: 1.7;
        }

        /* Scenario tags */
        .scenario-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .scenario-tag {
            padding: 10px 20px;
            background: var(--surface);
            border: 2px solid var(--border-light);
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-secondary);
            transition: all var(--transition);
            cursor: default;
        }
        .scenario-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-50);
            box-shadow: var(--shadow);
        }

        /* Footer */
        .site-footer {
            background: var(--text);
            color: #e2e8f0;
            padding: 48px 0 24px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li {
            font-size: 0.9rem;
            color: #cbd5e1;
        }
        .footer-col ul li a {
            color: #cbd5e1;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: #94a3b8;
            justify-content: space-between;
            align-items: center;
        }
        .footer-bottom a {
            color: #94a3b8;
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .hero-section .hero-bg {
                width: 100%;
                opacity: 0.06;
                border-radius: 0;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-list {
                grid-template-columns: repeat(3, 1fr);
            }
            .comparison-grid {
                grid-template-columns: 1fr;
                max-width: 100%;
            }
            .cta-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-text h1 {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0;
                --section-gap: 36px;
                --section-gap-sm: 24px;
            }
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-close {
                display: flex;
            }
            .sidebar-overlay.active {
                display: block;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .main-content {
                margin-left: 0;
            }
            .container {
                padding: 0 16px;
            }
            .container-narrow {
                padding: 0 16px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .metric-card .metric-value {
                font-size: 1.8rem;
            }
            .process-list {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .hero-text h1 {
                font-size: 1.7rem;
            }
            .hero-section {
                padding: 40px 0 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .scenario-tags {
                gap: 8px;
            }
            .scenario-tag {
                padding: 8px 14px;
                font-size: 0.82rem;
            }
            .card {
                padding: 20px;
            }
            .content-block {
                padding: 20px;
            }
            .comparison-col {
                padding: 20px;
            }
            .cta-form-card {
                padding: 20px;
            }
        }
        @media (max-width: 520px) {
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .metric-card {
                padding: 16px 10px;
            }
            .metric-card .metric-value {
                font-size: 1.5rem;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .section-header h2 {
                font-size: 1.35rem;
            }
            .hero-text h1 {
                font-size: 1.5rem;
            }
            .hero-visual {
                padding: 16px;
            }
            .hero-visual .demo-metric {
                padding: 10px 12px;
                gap: 10px;
            }
            .hero-visual .demo-metric .metric-icon {
                width: 34px;
                height: 34px;
                font-size: 0.9rem;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #1a56db;
            --primary-dark: #1040b0;
            --primary-light: #e8f0fe;
            --primary-50: #eff6ff;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fef3c7;
            --bg: #f8fafc;
            --surface: #ffffff;
            --surface-alt: #f1f5f9;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(0, 0, 0, 0.05);
            --radius-xs: 4px;
            --radius-sm: 6px;
            --radius: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --sidebar-width: 250px;
            --header-height: 60px;
            --transition: 0.2s ease;
            --transition-slow: 0.35s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --section-gap: 64px;
            --section-gap-sm: 40px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            display: flex;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        /* Sidebar */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--surface);
            border-right: 1px solid var(--border);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-md);
            transition: transform var(--transition-slow);
        }
        .sidebar-logo {
            padding: 20px 24px;
            border-bottom: 1px solid var(--border-light);
            flex-shrink: 0;
        }
        .sidebar-logo a {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .sidebar-nav {
            flex: 1;
            overflow-y: auto;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 16px;
            border-radius: var(--radius);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .sidebar-nav a:hover {
            background: var(--primary-50);
            color: var(--primary);
        }
        .sidebar-nav a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: var(--shadow-md);
        }
        .sidebar-nav a .nav-icon {
            width: 20px;
            text-align: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-light);
            flex-shrink: 0;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .sidebar-footer .sidebar-cta {
            display: block;
            width: 100%;
            padding: 10px 16px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 0.9rem;
            text-align: center;
            transition: all var(--transition);
            margin-bottom: 8px;
        }
        .sidebar-footer .sidebar-cta:hover {
            background: var(--accent-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        /* Mobile menu toggle */
        .mobile-menu-toggle {
            display: none;
            position: fixed;
            top: 14px;
            left: 14px;
            z-index: 1100;
            width: 40px;
            height: 40px;
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--text);
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .mobile-menu-toggle:hover {
            background: var(--primary-50);
            color: var(--primary);
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 999;
            transition: opacity var(--transition-slow);
        }
        .sidebar-overlay.active {
            display: block;
        }

        /* Main Content */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            transition: margin-left var(--transition-slow);
        }

        /* Container */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 32px;
        }
        .container-narrow {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* Section spacing */
        .section {
            padding: var(--section-gap) 0;
        }
        .section-sm {
            padding: var(--section-gap-sm) 0;
        }
        .section-alt {
            background: var(--surface-alt);
        }
        .section-dark {
            background: var(--text);
            color: #fff;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            white-space: nowrap;
            text-decoration: none;
            cursor: pointer;
            border: 2px solid transparent;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-50);
            color: var(--primary-dark);
            border-color: var(--primary-dark);
            box-shadow: var(--shadow);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }

        /* Badge / Tag */
        .badge {
            display: inline-block;
            padding: 6px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            text-transform: uppercase;
        }
        .badge-primary {
            background: var(--primary-light);
            color: var(--primary);
        }
        .badge-accent {
            background: var(--accent-light);
            color: var(--accent-dark);
        }
        .badge-success {
            background: #dcfce7;
            color: #166534;
        }

        /* Cards */
        .card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 28px;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
            transform: translateY(-3px);
        }
        .card-header {
            margin-bottom: 16px;
        }
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 12px;
            background: var(--primary-50);
            color: var(--primary);
        }
        .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* Grid */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        /* Hero Section */
        .hero-section {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(170deg, #f0f5ff 0%, #e8f0fe 40%, #f8fafc 100%);
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(26, 86, 219, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -60px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1.6fr 1fr;
            gap: 32px;
            align-items: center;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 32px;
        }
        .hero-side {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .hero-value-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 14px 16px;
            background: rgba(255, 255, 255, 0.75);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            backdrop-filter: blur(4px);
            transition: all var(--transition);
        }
        .hero-value-item:hover {
            background: #fff;
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
            transform: translateX(2px);
        }
        .hero-value-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius);
            background: var(--primary-50);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.95rem;
            flex-shrink: 0;
        }
        .hero-value-text {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
        }
        .hero-value-sub {
            font-size: 0.78rem;
            color: var(--text-secondary);
            font-weight: 400;
            margin-top: 2px;
        }
        .hero-center {
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.03em;
        }
        .hero-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin: 0;
        }
        .hero-title span {
            color: var(--primary);
        }
        .hero-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.6;
            max-width: 480px;
            margin: 0 auto;
        }
        .hero-screenshot {
            width: 100%;
            max-width: 440px;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-xl);
            border: 1px solid var(--border);
            background: #fff;
            overflow: hidden;
            transition: all var(--transition-slow);
        }
        .hero-screenshot img {
            width: 100%;
            height: auto;
            display: block;
        }
        .hero-screenshot:hover {
            box-shadow: 0 24px 48px rgba(0, 0, 0, 0.14);
            transform: translateY(-4px);
        }
        .hero-cta-group {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            justify-content: center;
        }

        /* Metrics */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .metric-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .metric-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--primary);
            border-radius: 0 0 var(--radius-xs) var(--radius-xs);
        }
        .metric-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .metric-value {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            line-height: 1;
            margin-bottom: 6px;
        }
        .metric-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .metric-sub {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* Service Matrix */
        .service-matrix {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .service-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 0;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .service-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--primary-light);
        }
        .service-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }
        .service-card-body {
            padding: 22px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .service-card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .service-card-desc {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }
        .service-card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 14px;
        }
        .service-tag {
            display: inline-block;
            padding: 4px 10px;
            background: var(--primary-50);
            color: var(--primary);
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 500;
        }

        /* Process Steps */
        .process-flow {
            display: flex;
            gap: 0;
            align-items: stretch;
            position: relative;
            flex-wrap: wrap;
        }
        .process-step {
            flex: 1;
            min-width: 140px;
            text-align: center;
            padding: 24px 16px;
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            position: relative;
            transition: all var(--transition);
            z-index: 1;
        }
        .process-step:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--primary-light);
            z-index: 2;
        }
        .process-step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 12px;
            transition: all var(--transition);
        }
        .process-step:hover .process-step-num {
            background: var(--primary-dark);
            box-shadow: var(--shadow-md);
            transform: scale(1.08);
        }
        .process-step-title {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text);
            margin-bottom: 4px;
        }
        .process-step-desc {
            font-size: 0.8rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }
        .process-connector {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            flex-shrink: 0;
            color: var(--primary);
            font-size: 1.2rem;
            font-weight: 700;
        }

        /* Comparison */
        .comparison-wrapper {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            gap: 0;
            align-items: stretch;
            max-width: 900px;
            margin: 0 auto;
            background: var(--surface);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
        }
        .comparison-col {
            padding: 32px 28px;
        }
        .comparison-col.before {
            background: #fef2f2;
        }
        .comparison-col.after {
            background: #f0fdf4;
        }
        .comparison-col-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .comparison-col.before .comparison-col-title {
            color: #dc2626;
        }
        .comparison-col.after .comparison-col-title {
            color: #16a34a;
        }
        .comparison-list {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .comparison-list li {
            font-size: 0.9rem;
            color: var(--text-secondary);
            padding-left: 22px;
            position: relative;
            line-height: 1.5;
        }
        .comparison-list li::before {
            position: absolute;
            left: 0;
            top: 2px;
            font-weight: 700;
            font-size: 0.85rem;
        }
        .comparison-col.before .comparison-list li::before {
            content: '✕';
            color: #dc2626;
        }
        .comparison-col.after .comparison-list li::before {
            content: '✓';
            color: #16a34a;
        }
        .comparison-divider {
            width: 2px;
            background: var(--border);
            flex-shrink: 0;
            position: relative;
        }
        .comparison-divider::after {
            content: 'VS';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: var(--surface);
            padding: 10px 8px;
            font-weight: 800;
            font-size: 0.85rem;
            color: var(--text-muted);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            letter-spacing: 0.05em;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .faq-question {
            width: 100%;
            padding: 18px 22px;
            background: none;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            cursor: pointer;
            transition: all var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            transition: transform var(--transition);
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 22px 18px;
        }
        .faq-answer p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* CTA Form */
        .cta-form-wrapper {
            background: var(--surface);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
            padding: 40px 36px;
            max-width: 700px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }
        .cta-form-info h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
            line-height: 1.3;
        }
        .cta-form-info p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .cta-form-info .cta-benefit-list {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .cta-form-info .cta-benefit-list li {
            font-size: 0.88rem;
            color: var(--text);
            padding-left: 20px;
            position: relative;
        }
        .cta-form-info .cta-benefit-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: 700;
        }
        .cta-form-fields {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .cta-form-fields input,
        .cta-form-fields select,
        .cta-form-fields textarea {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            font-size: 0.9rem;
            background: var(--surface-alt);
            transition: all var(--transition);
            color: var(--text);
        }
        .cta-form-fields input:focus,
        .cta-form-fields select:focus,
        .cta-form-fields textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
            background: #fff;
        }
        .cta-form-fields textarea {
            resize: vertical;
            min-height: 100px;
        }

        /* Deep Content */
        .deep-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .deep-content-text h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .deep-content-text p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 12px;
        }
        .deep-content-img {
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
        }
        .deep-content-img img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* Testimonials */
        .testimonial-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 28px;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            position: relative;
        }
        .testimonial-card::before {
            content: '"';
            position: absolute;
            top: 16px;
            left: 20px;
            font-size: 4rem;
            color: var(--primary-light);
            line-height: 1;
            font-family: Georgia, serif;
            pointer-events: none;
            opacity: 0.6;
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .testimonial-text {
            font-size: 0.95rem;
            color: var(--text);
            line-height: 1.7;
            position: relative;
            z-index: 1;
            padding-top: 10px;
        }
        .testimonial-author {
            margin-top: 16px;
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--text);
        }
        .testimonial-role {
            font-size: 0.8rem;
            color: var(--text-muted);
            font-weight: 400;
        }

        /* Section Header */
        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-header .section-badge {
            display: inline-block;
            padding: 6px 16px;
            background: var(--primary-50);
            color: var(--primary);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            margin-bottom: 12px;
            text-transform: uppercase;
        }
        .section-header h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
            margin-bottom: 8px;
            line-height: 1.3;
        }
        .section-header p {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        /* Footer */
        .site-footer {
            background: var(--text);
            color: #cbd5e1;
            padding: 48px 0 24px;
            margin-top: 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 32px;
        }
        .site-footer .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .site-footer .footer-col ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .site-footer .footer-col ul li {
            font-size: 0.88rem;
            color: #94a3b8;
        }
        .site-footer .footer-col ul li a {
            color: #94a3b8;
            transition: color var(--transition);
        }
        .site-footer .footer-col ul li a:hover {
            color: #fff;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: #64748b;
        }
        .site-footer .footer-bottom a {
            color: #94a3b8;
            transition: color var(--transition);
        }
        .site-footer .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 220px;
                --section-gap: 48px;
                --section-gap-sm: 32px;
            }
            .hero-inner {
                grid-template-columns: 1fr 1.8fr 1fr;
                gap: 20px;
            }
            .hero-title {
                font-size: 1.8rem;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-matrix {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .comparison-wrapper {
                grid-template-columns: 1fr;
            }
            .comparison-divider {
                width: 100%;
                height: 2px;
            }
            .comparison-divider::after {
                top: 50%;
                left: 50%;
                transform: translate(-50%, -50%);
            }
            .cta-form-wrapper {
                grid-template-columns: 1fr;
            }
            .deep-content {
                grid-template-columns: 1fr;
            }
            .site-footer .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-flow {
                flex-wrap: wrap;
                gap: 12px;
            }
            .process-connector {
                display: none;
            }
            .process-step {
                flex: 1 1 calc(33% - 12px);
                min-width: 120px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0;
                --section-gap: 40px;
                --section-gap-sm: 28px;
            }
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
                width: 260px;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .main-content {
                margin-left: 0;
            }
            .container {
                padding: 0 20px;
            }
            .container-narrow {
                padding: 0 20px;
            }
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 24px;
                text-align: center;
            }
            .hero-side {
                flex-direction: row;
                flex-wrap: wrap;
                justify-content: center;
                gap: 10px;
            }
            .hero-value-item {
                flex: 1 1 calc(50% - 10px);
                min-width: 140px;
                text-align: left;
            }
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-screenshot {
                max-width: 300px;
                margin: 0 auto;
            }
            .hero-cta-group {
                flex-direction: column;
                align-items: center;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-matrix {
                grid-template-columns: 1fr;
            }
            .grid-2 {
                grid-template-columns: 1fr;
            }
            .grid-3 {
                grid-template-columns: 1fr;
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .comparison-wrapper {
                grid-template-columns: 1fr;
            }
            .comparison-divider {
                width: 100%;
                height: 2px;
            }
            .cta-form-wrapper {
                grid-template-columns: 1fr;
                padding: 28px 20px;
            }
            .deep-content {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 10px;
            }
            .process-flow {
                flex-direction: column;
                gap: 12px;
            }
            .process-step {
                flex: 1 1 auto;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .hero-value-item {
                flex: 1 1 100%;
            }
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .grid-4 {
                grid-template-columns: 1fr;
            }
            .hero-title {
                font-size: 1.4rem;
            }
            .hero-screenshot {
                max-width: 240px;
            }
            .section-header h2 {
                font-size: 1.3rem;
            }
            .metric-value {
                font-size: 2rem;
            }
        }

/* roulang page: category6 */
:root {
            --primary: #1a56db;
            --primary-dark: #1040b0;
            --primary-light: #e8f0fe;
            --primary-50: #eff6ff;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fef3c7;
            --accent-red: #e53e3e;
            --accent-red-dark: #c53030;
            --bg: #f8fafc;
            --surface: #ffffff;
            --surface-alt: #f1f5f9;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(0, 0, 0, 0.05);
            --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
            --shadow-card-hover: 0 12px 28px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(0, 0, 0, 0.06);
            --radius-xs: 4px;
            --radius-sm: 6px;
            --radius: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --sidebar-width: 220px;
            --header-height: 60px;
            --transition: 0.2s ease;
            --transition-slow: 0.35s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --section-gap: 56px;
            --section-gap-sm: 36px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            display: flex;
            min-height: 100vh;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        /* Sidebar */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--surface);
            border-right: 1px solid var(--border);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-md);
            transition: transform var(--transition-slow);
        }
        .sidebar-logo {
            padding: 18px 20px;
            border-bottom: 1px solid var(--border-light);
            flex-shrink: 0;
        }
        .sidebar-logo a {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-logo .logo-icon {
            width: 34px;
            height: 34px;
            background: var(--primary);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .sidebar-nav {
            flex: 1;
            overflow-y: auto;
            padding: 14px 10px;
            display: flex;
            flex-direction: column;
            gap: 3px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 14px;
            border-radius: var(--radius);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.93rem;
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .sidebar-nav a:hover {
            background: var(--primary-50);
            color: var(--primary);
        }
        .sidebar-nav a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: var(--shadow-md);
        }
        .sidebar-nav a .nav-icon {
            width: 20px;
            text-align: center;
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .sidebar-footer {
            padding: 14px 18px;
            border-top: 1px solid var(--border-light);
            flex-shrink: 0;
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .sidebar-footer .sidebar-cta {
            display: block;
            width: 100%;
            padding: 9px 14px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 0.85rem;
            text-align: center;
            transition: all var(--transition);
            margin-bottom: 8px;
        }
        .sidebar-footer .sidebar-cta:hover {
            background: var(--accent-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
        }

        /* Mobile sidebar toggle */
        .sidebar-toggle {
            display: none;
            position: fixed;
            top: 12px;
            left: 12px;
            z-index: 1100;
            width: 40px;
            height: 40px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--text);
            box-shadow: var(--shadow);
            cursor: pointer;
            transition: all var(--transition);
        }
        .sidebar-toggle:hover {
            background: var(--primary-50);
            color: var(--primary);
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 999;
            transition: opacity var(--transition-slow);
        }
        .sidebar-overlay.show {
            display: block;
        }

        /* Main Content */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            transition: margin-left var(--transition-slow);
        }

        /* Container */
        .container-custom {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 32px;
        }

        /* Section */
        .section {
            padding: var(--section-gap) 0;
        }
        .section-sm {
            padding: var(--section-gap-sm) 0;
        }
        .section-alt {
            background: var(--surface-alt);
        }
        .section-surface {
            background: var(--surface);
        }
        .section-dark {
            background: #0f172a;
            color: #e2e8f0;
        }

        /* Section Title */
        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--primary);
            background: var(--primary-50);
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
            margin-bottom: 10px;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.7;
        }

        /* Hero Flash Sale */
        .hero-flash {
            position: relative;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 40%, #1a4b8c 100%);
            color: #fff;
            padding: 50px 0 60px;
            overflow: hidden;
            min-height: 480px;
            display: flex;
            align-items: center;
        }
        .hero-flash::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.18;
            z-index: 0;
        }
        .hero-flash .hero-bg-pattern {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 75% 50%, rgba(245, 158, 11, 0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 25% 30%, rgba(26, 86, 219, 0.2) 0%, transparent 50%);
            z-index: 1;
        }
        .hero-flash .container-custom {
            position: relative;
            z-index: 2;
        }
        .flash-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-red);
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 8px 18px;
            border-radius: 24px;
            animation: pulse-badge 2s ease-in-out infinite;
            margin-bottom: 20px;
            letter-spacing: 0.03em;
        }
        .flash-badge i {
            font-size: 0.85rem;
        }
        @keyframes pulse-badge {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(229, 62, 62, 0.5);
            }
            50% {
                box-shadow: 0 0 0 14px rgba(229, 62, 62, 0);
            }
        }
        .hero-flash h1 {
            font-size: 2.6rem;
            font-weight: 900;
            letter-spacing: -0.03em;
            line-height: 1.2;
            margin-bottom: 16px;
            color: #fff;
        }
        .hero-flash h1 .highlight {
            color: var(--accent);
            position: relative;
        }
        .hero-flash .hero-desc {
            font-size: 1.1rem;
            color: #cbd5e1;
            max-width: 600px;
            line-height: 1.7;
            margin-bottom: 24px;
        }
        .countdown-row {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }
        .countdown-box {
            display: flex;
            gap: 10px;
            align-items: center;
        }
        .countdown-item {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-md);
            padding: 12px 16px;
            text-align: center;
            min-width: 64px;
        }
        .countdown-item .count-num {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1;
        }
        .countdown-item .count-label {
            font-size: 0.7rem;
            color: #cbd5e1;
            margin-top: 4px;
            letter-spacing: 0.04em;
        }
        .countdown-sep {
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            opacity: 0.7;
        }
        .flash-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            align-items: center;
        }
        .btn-flash-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 30px;
            background: var(--accent);
            color: #1a1a1a;
            font-weight: 700;
            font-size: 1rem;
            border-radius: var(--radius);
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.4);
            letter-spacing: 0.02em;
        }
        .btn-flash-primary:hover {
            background: #fbbf24;
            color: #1a1a1a;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.5);
        }
        .btn-flash-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border-radius: var(--radius);
            border: 2px solid rgba(255, 255, 255, 0.5);
            transition: all var(--transition);
        }
        .btn-flash-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
        }
        .hero-flash .hero-visual-card {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-xl);
            padding: 24px 20px;
            text-align: center;
            max-width: 320px;
        }
        .hero-visual-card .visual-badge {
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.05em;
            margin-bottom: 8px;
        }
        .hero-visual-card .visual-price {
            font-size: 2.8rem;
            font-weight: 900;
            color: #fff;
            line-height: 1;
        }
        .hero-visual-card .visual-price small {
            font-size: 1rem;
            font-weight: 400;
            color: #cbd5e1;
            text-decoration: line-through;
            margin-left: 6px;
        }
        .hero-visual-card .visual-meta {
            font-size: 0.85rem;
            color: #94a3b8;
            margin-top: 6px;
        }

        /* Metrics Dashboard */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .metric-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .metric-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .metric-card .metric-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 1.3rem;
        }
        .metric-card .metric-icon.blue {
            background: var(--primary-50);
            color: var(--primary);
        }
        .metric-card .metric-icon.green {
            background: #ecfdf5;
            color: #059669;
        }
        .metric-card .metric-icon.amber {
            background: var(--accent-light);
            color: var(--accent-dark);
        }
        .metric-card .metric-icon.purple {
            background: #f3e8ff;
            color: #7c3aed;
        }
        .metric-card .metric-value {
            font-size: 2.4rem;
            font-weight: 900;
            color: var(--text);
            letter-spacing: -0.02em;
            line-height: 1;
        }
        .metric-card .metric-value span {
            font-size: 1rem;
            font-weight: 600;
            color: #059669;
            margin-left: 4px;
        }
        .metric-card .metric-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 6px;
            font-weight: 500;
        }
        .metric-card .metric-trend {
            font-size: 0.78rem;
            color: #059669;
            font-weight: 600;
            margin-top: 4px;
        }

        /* Service Matrix */
        .service-matrix {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .service-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .service-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .service-card .card-img-wrap {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .service-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .service-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }
        .service-card .card-img-wrap .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--primary);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 5px 12px;
            border-radius: 20px;
            letter-spacing: 0.03em;
        }
        .service-card .card-body {
            padding: 20px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .service-card .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .service-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
        }
        .service-card .card-body .card-link {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }
        .service-card .card-body .card-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* Comparison */
        .comparison-wrap {
            display: grid;
            grid-template-columns: 1fr 60px 1fr;
            gap: 0;
            align-items: stretch;
            max-width: 900px;
            margin: 0 auto;
        }
        .comparison-col {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
        }
        .comparison-col.before {
            border-left: 4px solid #e53e3e;
        }
        .comparison-col.after {
            border-left: 4px solid #059669;
        }
        .comparison-col h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .comparison-col.before h4 {
            color: #e53e3e;
        }
        .comparison-col.after h4 {
            color: #059669;
        }
        .comparison-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .comparison-col ul li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.9rem;
            color: var(--text-secondary);
            display: flex;
            align-items: flex-start;
            gap: 8px;
            line-height: 1.5;
        }
        .comparison-col ul li:last-child {
            border-bottom: none;
        }
        .comparison-col ul li i {
            margin-top: 3px;
            flex-shrink: 0;
        }
        .comparison-col.before ul li i {
            color: #e53e3e;
        }
        .comparison-col.after ul li i {
            color: #059669;
        }
        .comparison-vs {
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.3rem;
            color: var(--text-muted);
            letter-spacing: 0.05em;
            writing-mode: vertical-lr;
        }

        /* Process */
        .process-steps {
            display: flex;
            gap: 0;
            flex-wrap: nowrap;
            overflow-x: auto;
            padding: 10px 0;
            scroll-snap-type: x proximity;
        }
        .process-step {
            flex: 1;
            min-width: 200px;
            text-align: center;
            position: relative;
            padding: 0 16px;
            scroll-snap-align: start;
        }
        .process-step .step-circle {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.3rem;
            margin: 0 auto 16px;
            position: relative;
            z-index: 2;
            box-shadow: var(--shadow-md);
        }
        .process-step::after {
            content: '';
            position: absolute;
            top: 28px;
            left: 55%;
            width: 90%;
            height: 3px;
            background: var(--border);
            z-index: 1;
        }
        .process-step:last-child::after {
            display: none;
        }
        .process-step h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }
        .process-step p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* Case Cards */
        .case-cards {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .case-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .case-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .case-card .case-img {
            height: 180px;
            overflow: hidden;
        }
        .case-card .case-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .case-card .case-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .case-card .case-body .case-industry {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.04em;
            text-transform: uppercase;
            margin-bottom: 6px;
        }
        .case-card .case-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .case-card .case-body p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }
        .case-card .case-stats {
            display: flex;
            gap: 16px;
            margin-top: 12px;
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }
        .case-card .case-stat {
            text-align: center;
            flex: 1;
        }
        .case-card .case-stat .stat-num {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
        }
        .case-card .case-stat .stat-label {
            font-size: 0.72rem;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--surface);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow);
        }
        .faq-item .faq-question {
            padding: 18px 20px;
            font-weight: 700;
            font-size: 1rem;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            background: transparent;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-item .faq-question:hover {
            background: var(--primary-50);
        }
        .faq-item .faq-question i {
            transition: transform var(--transition);
            color: var(--text-muted);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-item .faq-answer {
            padding: 0 20px 18px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #1a56db 0%, #1040b0 100%);
            color: #fff;
            padding: 56px 0;
            text-align: center;
            border-radius: 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section .container-custom {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: #cbd5e1;
            max-width: 600px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .cta-form {
            display: flex;
            gap: 10px;
            max-width: 500px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }
        .cta-form input {
            flex: 1;
            min-width: 220px;
            padding: 13px 18px;
            border-radius: var(--radius);
            border: 2px solid transparent;
            font-size: 0.95rem;
            background: #fff;
            color: var(--text);
            transition: all var(--transition);
        }
        .cta-form input:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.2);
        }
        .cta-form button {
            padding: 13px 28px;
            background: var(--accent);
            color: #1a1a1a;
            font-weight: 700;
            font-size: 0.95rem;
            border-radius: var(--radius);
            transition: all var(--transition);
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
        }
        .cta-form button:hover {
            background: #fbbf24;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(245, 158, 11, 0.45);
        }

        /* Footer */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 48px 0 28px;
            font-size: 0.9rem;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 32px;
        }
        .site-footer .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .site-footer .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 8px;
        }
        .site-footer .footer-col ul li a {
            color: #94a3b8;
            transition: color var(--transition);
            font-size: 0.88rem;
        }
        .site-footer .footer-col ul li a:hover {
            color: #fff;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
            color: #94a3b8;
        }
        .site-footer .footer-bottom a {
            color: #94a3b8;
            transition: color var(--transition);
        }
        .site-footer .footer-bottom a:hover {
            color: #fff;
        }

        /* Buttons */
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius);
            transition: all var(--transition);
            box-shadow: var(--shadow);
        }
        .btn-primary-custom:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius);
            border: 2px solid var(--primary);
            transition: all var(--transition);
        }
        .btn-outline-custom:hover {
            background: var(--primary-50);
            color: var(--primary-dark);
            border-color: var(--primary-dark);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 0;
                --section-gap: 40px;
                --section-gap-sm: 28px;
            }
            .sidebar {
                transform: translateX(-260px);
                width: 260px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-toggle {
                display: flex;
            }
            .sidebar-overlay.show {
                display: block;
            }
            .main-content {
                margin-left: 0;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-matrix {
                grid-template-columns: repeat(2, 1fr);
            }
            .comparison-wrap {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .comparison-vs {
                writing-mode: horizontal-tb;
                font-size: 1rem;
                padding: 8px 0;
            }
            .case-cards {
                grid-template-columns: 1fr;
            }
            .hero-flash h1 {
                font-size: 2rem;
            }
            .container-custom {
                padding: 0 20px;
            }
            .site-footer .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps {
                flex-wrap: wrap;
                gap: 20px;
            }
            .process-step::after {
                display: none;
            }
            .process-step {
                min-width: 140px;
                flex: 1 1 40%;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-gap: 32px;
                --section-gap-sm: 24px;
            }
            .hero-flash {
                padding: 36px 0 40px;
                min-height: auto;
            }
            .hero-flash h1 {
                font-size: 1.6rem;
            }
            .hero-flash .hero-desc {
                font-size: 0.95rem;
            }
            .countdown-item {
                padding: 10px 12px;
                min-width: 50px;
            }
            .countdown-item .count-num {
                font-size: 1.3rem;
            }
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .service-matrix {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .case-cards {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .cta-form {
                flex-direction: column;
                align-items: center;
            }
            .cta-form input {
                width: 100%;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .flash-cta-group {
                flex-direction: column;
                width: 100%;
            }
            .btn-flash-primary,
            .btn-flash-outline {
                width: 100%;
                justify-content: center;
            }
            .countdown-row {
                justify-content: center;
            }
            .comparison-wrap {
                grid-template-columns: 1fr;
            }
            .comparison-vs {
                writing-mode: horizontal-tb;
                padding: 6px 0;
                font-size: 0.9rem;
            }
            .process-steps {
                flex-direction: column;
                gap: 16px;
            }
            .process-step {
                flex: 1 1 auto;
                min-width: auto;
            }
        }
        @media (max-width: 520px) {
            .hero-flash h1 {
                font-size: 1.35rem;
            }
            .countdown-box {
                gap: 6px;
            }
            .countdown-item {
                padding: 8px 10px;
                min-width: 44px;
            }
            .countdown-item .count-num {
                font-size: 1.1rem;
            }
            .countdown-item .count-label {
                font-size: 0.65rem;
            }
            .countdown-sep {
                font-size: 1rem;
            }
            .container-custom {
                padding: 0 14px;
            }
            .metric-card .metric-value {
                font-size: 1.8rem;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .flash-badge {
                font-size: 0.78rem;
                padding: 6px 14px;
            }
        }

/* roulang page: category7 */
:root {
            --primary: #1a56db;
            --primary-dark: #1040b0;
            --primary-light: #e8f0fe;
            --primary-50: #eff6ff;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fef3c7;
            --bg: #f8fafc;
            --surface: #ffffff;
            --surface-alt: #f1f5f9;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(0, 0, 0, 0.05);
            --radius-xs: 4px;
            --radius-sm: 6px;
            --radius: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --sidebar-width: 250px;
            --header-height: 60px;
            --transition: 0.2s ease;
            --transition-slow: 0.35s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --section-gap: 64px;
            --section-gap-sm: 40px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            display: flex;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        /* Sidebar */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--surface);
            border-right: 1px solid var(--border);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-md);
            transition: transform var(--transition-slow);
        }

        .sidebar-logo {
            padding: 20px 24px;
            border-bottom: 1px solid var(--border-light);
            flex-shrink: 0;
        }

        .sidebar-logo a {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .sidebar-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        .sidebar-nav {
            flex: 1;
            overflow-y: auto;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 16px;
            border-radius: var(--radius);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }

        .sidebar-nav a:hover {
            background: var(--primary-50);
            color: var(--primary);
        }

        .sidebar-nav a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: var(--shadow-md);
        }

        .sidebar-nav a .nav-icon {
            width: 20px;
            text-align: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-light);
            flex-shrink: 0;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .sidebar-footer .sidebar-cta {
            display: block;
            width: 100%;
            padding: 10px 16px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius);
            text-align: center;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
            margin-bottom: 10px;
        }

        .sidebar-footer .sidebar-cta:hover {
            background: var(--accent-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
        }

        /* Mobile Header */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            z-index: 999;
            align-items: center;
            padding: 0 16px;
            justify-content: space-between;
            box-shadow: var(--shadow-sm);
        }

        .mobile-header .mobile-logo {
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-header .mobile-logo .logo-icon-sm {
            width: 28px;
            height: 28px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 0.85rem;
            font-weight: 700;
        }

        .hamburger-btn {
            width: 40px;
            height: 40px;
            background: var(--surface-alt);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--text);
            transition: all var(--transition);
        }

        .hamburger-btn:hover {
            background: var(--primary-50);
            color: var(--primary);
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 998;
        }

        .sidebar-overlay.show {
            display: block;
        }

        /* Main Content */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        .container-narrow {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        section {
            padding: var(--section-gap) 0;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--primary);
            background: var(--primary-50);
            padding: 6px 14px;
            border-radius: 999px;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 650px;
            line-height: 1.7;
        }

        /* Hero - Immersive Dark */
        .hero-immersive {
            position: relative;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            min-height: 520px;
            display: flex;
            align-items: center;
            padding: 80px 0;
            overflow: hidden;
        }

        .hero-immersive::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(15, 23, 42, 0.78) 40%, rgba(30, 58, 138, 0.7) 100%);
            z-index: 1;
        }

        .hero-immersive .hero-content {
            position: relative;
            z-index: 2;
            color: #fff;
        }

        .hero-immersive .hero-badge-row {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 20px;
        }

        .hero-immersive .hot-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 600;
            color: #fff;
            white-space: nowrap;
        }

        .hero-immersive .hot-badge .badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #22c55e;
            animation: pulse-dot 1.8s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.6);
            }
            50% {
                opacity: 0.6;
                box-shadow: 0 0 0 10px rgba(34, 197, 94, 0);
            }
        }

        .hero-immersive .hero-title {
            font-size: 2.8rem;
            font-weight: 900;
            letter-spacing: -0.03em;
            line-height: 1.2;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
        }

        .hero-immersive .hero-title span {
            color: var(--accent);
        }

        .hero-immersive .hero-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 580px;
            line-height: 1.7;
            margin-bottom: 28px;
        }

        .hero-immersive .hero-cta-row {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .btn-primary {
            background: var(--accent);
            color: #1e293b;
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.35);
        }

        .btn-primary:hover {
            background: #fbbf24;
            color: #1e293b;
            box-shadow: 0 6px 22px rgba(245, 158, 11, 0.5);
            transform: translateY(-2px);
        }

        .btn-outline-light {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.5);
            color: #fff;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
        }

        .btn-white {
            background: #fff;
            color: var(--primary);
            box-shadow: var(--shadow-md);
        }

        .btn-white:hover {
            background: #f8fafc;
            color: var(--primary-dark);
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }

        /* Metrics Dashboard */
        .metrics-section {
            background: var(--surface);
            padding: var(--section-gap) 0;
            border-bottom: 1px solid var(--border-light);
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .metric-card {
            background: var(--surface-alt);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition);
            border: 1px solid transparent;
        }

        .metric-card:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            background: var(--surface);
        }

        .metric-card .metric-value {
            font-size: 2.6rem;
            font-weight: 900;
            color: var(--primary);
            letter-spacing: -0.02em;
            line-height: 1;
            margin-bottom: 6px;
        }

        .metric-card .metric-value .metric-unit {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-secondary);
        }

        .metric-card .metric-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .metric-card .metric-trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.8rem;
            font-weight: 600;
            color: #16a34a;
            margin-top: 6px;
        }

        /* Service Matrix */
        .service-matrix {
            background: var(--bg);
            padding: var(--section-gap) 0;
        }

        .matrix-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 32px;
        }

        .matrix-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .matrix-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--border);
        }

        .matrix-card .matrix-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background: var(--primary-50);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            flex-shrink: 0;
        }

        .matrix-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.01em;
        }

        .matrix-card p {
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }

        .matrix-card .matrix-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .matrix-card .matrix-tag {
            font-size: 0.75rem;
            background: var(--surface-alt);
            color: var(--text-secondary);
            padding: 4px 10px;
            border-radius: 999px;
            font-weight: 500;
        }

        .matrix-card .matrix-img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-radius: var(--radius);
            margin-top: 4px;
        }

        /* Results Comparison */
        .results-section {
            background: var(--surface);
            padding: var(--section-gap) 0;
        }

        .comparison-table-wrap {
            overflow-x: auto;
            margin-top: 28px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--surface);
            min-width: 700px;
        }

        .comparison-table thead th {
            background: var(--primary);
            color: #fff;
            padding: 16px 20px;
            font-weight: 600;
            font-size: 0.95rem;
            text-align: left;
            white-space: nowrap;
        }

        .comparison-table thead th:first-child {
            border-radius: var(--radius-lg) 0 0 0;
        }

        .comparison-table thead th:last-child {
            border-radius: 0 var(--radius-lg) 0 0;
        }

        .comparison-table tbody td {
            padding: 14px 20px;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.93rem;
            color: var(--text);
        }

        .comparison-table tbody tr:hover {
            background: var(--primary-50);
        }

        .comparison-table .highlight-cell {
            color: #16a34a;
            font-weight: 700;
        }

        .comparison-table .improve-badge {
            display: inline-block;
            background: #dcfce7;
            color: #16a34a;
            padding: 3px 10px;
            border-radius: 999px;
            font-size: 0.78rem;
            font-weight: 600;
        }

        /* Process Section */
        .process-section {
            background: var(--bg);
            padding: var(--section-gap) 0;
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
            margin-top: 32px;
        }

        .process-step {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 24px 18px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }

        .process-step:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }

        .process-step .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 12px;
        }

        .process-step h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }

        .process-step p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .process-connector {
            display: none;
        }

        /* Case Showcase */
        .case-section {
            background: var(--surface);
            padding: var(--section-gap) 0;
        }

        .case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            margin-top: 28px;
        }

        .case-card {
            background: var(--surface-alt);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .case-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }

        .case-card .case-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .case-card .case-body {
            padding: 20px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .case-card .case-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text);
        }

        .case-card .case-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }

        .case-card .case-meta {
            display: flex;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .case-card .case-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* Brand Intro */
        .brand-intro-section {
            background: var(--bg);
            padding: var(--section-gap) 0;
        }

        .brand-intro-card {
            background: var(--surface);
            border-radius: var(--radius-xl);
            padding: 40px 36px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            display: flex;
            gap: 32px;
            align-items: flex-start;
            flex-wrap: wrap;
        }

        .brand-intro-card .brand-intro-icon {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-lg);
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: #fff;
            flex-shrink: 0;
        }

        .brand-intro-card .brand-intro-text {
            flex: 1;
            min-width: 280px;
        }

        .brand-intro-card .brand-intro-text h3 {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }

        .brand-intro-card .brand-intro-text p {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* FAQ */
        .faq-section {
            background: var(--surface);
            padding: var(--section-gap) 0;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 24px;
        }

        .faq-item {
            background: var(--surface-alt);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            padding: 18px 24px;
            background: transparent;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            text-align: left;
            transition: all var(--transition);
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-question .faq-icon {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* CTA Section */
        .cta-section {
            background: var(--primary);
            padding: var(--section-gap) 0;
            color: #fff;
        }

        .cta-card {
            background: rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-xl);
            padding: 40px 36px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            display: flex;
            gap: 28px;
            align-items: center;
            flex-wrap: wrap;
        }

        .cta-card .cta-info {
            flex: 1;
            min-width: 280px;
        }

        .cta-card .cta-info h2 {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 8px;
        }

        .cta-card .cta-info p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .cta-form-wrap {
            flex: 1;
            min-width: 300px;
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-xl);
        }

        .cta-form-wrap h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
            text-align: center;
        }

        .cta-form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .cta-form input,
        .cta-form select,
        .cta-form textarea {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: var(--radius);
            font-size: 0.95rem;
            transition: all var(--transition);
            background: var(--surface-alt);
            color: var(--text);
        }

        .cta-form input:focus,
        .cta-form select:focus,
        .cta-form textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(26, 86, 219, 0.1);
            background: #fff;
        }

        .cta-form textarea {
            resize: vertical;
            min-height: 90px;
        }

        .btn-submit {
            width: 100%;
            padding: 14px;
            background: var(--primary);
            color: #fff;
            border-radius: 999px;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition);
            letter-spacing: 0.01em;
        }

        .btn-submit:hover {
            background: var(--primary-dark);
            box-shadow: var(--shadow-lg);
            transform: translateY(-1px);
        }

        /* Footer */
        .site-footer {
            background: #0f172a;
            color: #e2e8f0;
            padding: 48px 0 24px;
            margin-top: auto;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 32px;
        }

        .site-footer .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .site-footer .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .site-footer .footer-col ul li {
            font-size: 0.9rem;
            color: #cbd5e1;
        }

        .site-footer .footer-col ul li a {
            color: #cbd5e1;
            transition: color var(--transition);
        }

        .site-footer .footer-col ul li a:hover {
            color: #fff;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: #94a3b8;
            justify-content: space-between;
            align-items: center;
        }

        .site-footer .footer-bottom a {
            color: #94a3b8;
            transition: color var(--transition);
        }

        .site-footer .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 220px;
                --section-gap: 48px;
                --section-gap-sm: 32px;
            }
            .hero-immersive .hero-title {
                font-size: 2.2rem;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .matrix-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps {
                grid-template-columns: repeat(3, 1fr);
            }
            .case-grid {
                grid-template-columns: 1fr;
            }
            .site-footer .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0;
                --section-gap: 40px;
                --section-gap-sm: 28px;
            }
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay.show {
                display: block;
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 56px;
            }
            .hero-immersive {
                min-height: 400px;
                padding: 60px 0;
            }
            .hero-immersive .hero-title {
                font-size: 1.7rem;
            }
            .hero-immersive .hero-desc {
                font-size: 0.95rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .metric-card .metric-value {
                font-size: 2rem;
            }
            .matrix-grid {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .comparison-table-wrap {
                font-size: 0.85rem;
            }
            .comparison-table thead th,
            .comparison-table tbody td {
                padding: 10px 12px;
            }
            .brand-intro-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 28px 20px;
            }
            .cta-card {
                flex-direction: column;
                padding: 28px 20px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .hero-immersive .hero-badge-row {
                gap: 8px;
            }
            .hero-immersive .hot-badge {
                font-size: 0.75rem;
                padding: 6px 12px;
            }
            .btn {
                padding: 11px 22px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .hero-immersive .hero-title {
                font-size: 1.4rem;
            }
            .hero-immersive {
                min-height: 340px;
                padding: 48px 0;
            }
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .container {
                padding: 0 14px;
            }
            .container-narrow {
                padding: 0 14px;
            }
            .matrix-card {
                padding: 20px 16px;
            }
            .case-card .case-body {
                padding: 16px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .faq-answer-inner {
                padding: 0 16px 16px;
            }
        }