/* roulang page: index */
:root {
            --color-primary: #E63946;
            --color-primary-dark: #C62936;
            --color-secondary: #457B9D;
            --color-accent: #F1FAEE;
            --color-dark: #1D3557;
            --color-text: #2B2D42;
            --color-text-light: #6B7280;
            --color-bg: #FFFFFF;
            --color-bg-light: #F8F9FA;
            --color-border: #E5E7EB;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
            --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
            --spacing: 1.5rem;
        }
        
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            font-size: 16px;
        }
        
        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        button, .button {
            cursor: pointer;
            border: none;
            outline: none;
            transition: all 0.3s ease;
        }
        
        input, textarea {
            font-family: inherit;
            font-size: inherit;
        }
        
        .container-custom {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        
        /* Header & Navigation */
        .site-header {
            background: var(--color-bg);
            border-bottom: 1px solid var(--color-border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-sm);
        }
        
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 1.5rem;
            max-width: 1280px;
            margin: 0 auto;
        }
        
        .site-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.02em;
        }
        
        .nav-tabs {
            display: flex;
            gap: 0.5rem;
            align-items: center;
        }
        
        .nav-tabs a {
            padding: 0.5rem 1.2rem;
            border-radius: 20px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text);
            background: transparent;
            transition: all 0.25s ease;
        }
        
        .nav-tabs a:hover {
            background: var(--color-bg-light);
            color: var(--color-primary);
        }
        
        .nav-tabs a.active {
            background: var(--color-primary);
            color: white;
        }
        
        .nav-cta {
            display: flex;
            gap: 0.75rem;
        }
        
        .btn-primary {
            background: var(--color-primary);
            color: white;
            padding: 0.65rem 1.5rem;
            border-radius: 24px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all 0.3s ease;
        }
        
        .btn-primary:hover {
            background: var(--color-primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        
        .btn-secondary {
            background: transparent;
            color: var(--color-text);
            padding: 0.65rem 1.5rem;
            border: 1px solid var(--color-border);
            border-radius: 24px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all 0.3s ease;
        }
        
        .btn-secondary:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
        }
        
        /* Hero Section - Bento Layout */
        .hero-bento {
            padding: 3rem 1.5rem;
            max-width: 1280px;
            margin: 0 auto;
        }
        
        .bento-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 1.25rem;
            min-height: 520px;
        }
        
        .bento-main {
            grid-column: span 7;
            background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-secondary) 100%);
            border-radius: var(--radius-lg);
            padding: 3rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
            color: white;
            position: relative;
            overflow: hidden;
        }
        
        .bento-main::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: rgba(255,255,255,0.05);
            border-radius: 50%;
        }
        
        .bento-main h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1.25rem;
            position: relative;
            z-index: 1;
        }
        
        .bento-main p {
            font-size: 1.15rem;
            line-height: 1.7;
            margin-bottom: 2rem;
            opacity: 0.95;
            max-width: 540px;
            position: relative;
            z-index: 1;
        }
        
        .hero-actions {
            display: flex;
            gap: 1rem;
            position: relative;
            z-index: 1;
        }
        
        .btn-hero {
            padding: 0.85rem 2rem;
            border-radius: 28px;
            font-weight: 600;
            font-size: 1rem;
        }
        
        .btn-hero-primary {
            background: white;
            color: var(--color-primary);
        }
        
        .btn-hero-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.2);
        }
        
        .btn-hero-secondary {
            background: rgba(255,255,255,0.15);
            color: white;
            backdrop-filter: blur(10px);
        }
        
        .btn-hero-secondary:hover {
            background: rgba(255,255,255,0.25);
        }
        
        .bento-side {
            grid-column: span 5;
            display: flex;
            flex-direction: column;
            gap: 1.25rem;
        }
        
        .bento-card {
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 2rem;
            flex: 1;
            display: flex;
            flex-direction: column;
            transition: all 0.3s ease;
        }
        
        .bento-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: var(--color-primary);
        }
        
        .bento-card-icon {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1rem;
        }
        
        .bento-card-icon i {
            font-size: 1.5rem;
            color: white;
        }
        
        .bento-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--color-dark);
        }
        
        .bento-card p {
            font-size: 0.95rem;
            color: var(--color-text-light);
            line-height: 1.6;
            margin-bottom: 1rem;
        }
        
        .bento-card-link {
            color: var(--color-primary);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            margin-top: auto;
        }
        
        .bento-card-link:hover {
            gap: 0.75rem;
        }
        
        .bento-cta {
            grid-column: span 12;
            background: var(--color-accent);
            border-radius: var(--radius-md);
            padding: 1.5rem 2rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        .bento-cta-text h4 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 0.25rem;
        }
        
        .bento-cta-text p {
            font-size: 0.95rem;
            color: var(--color-text-light);
        }
        
        .bento-cta-action .btn-primary {
            padding: 0.75rem 2rem;
        }
        
        /* Section Styles */
        section {
            padding: 4.5rem 1.5rem;
        }
        
        .section-header {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 3rem;
        }
        
        .section-label {
            display: inline-block;
            background: var(--color-accent);
            color: var(--color-primary);
            padding: 0.4rem 1rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        
        .section-title {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--color-dark);
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        
        .section-desc {
            font-size: 1.1rem;
            color: var(--color-text-light);
            line-height: 1.7;
        }
        
        /* App Features */
        .app-features {
            background: var(--color-bg-light);
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 2rem;
            max-width: 1280px;
            margin: 0 auto;
        }
        
        .feature-card {
            background: white;
            border-radius: var(--radius-md);
            padding: 2.5rem;
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }
        
        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-5px);
        }
        
        .feature-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
        }
        
        .feature-icon i {
            font-size: 1.8rem;
            color: white;
        }
        
        .feature-card h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--color-dark);
        }
        
        .feature-card p {
            font-size: 1rem;
            color: var(--color-text-light);
            line-height: 1.7;
        }
        
        /* Service Categories */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
            max-width: 1280px;
            margin: 0 auto;
        }
        
        .service-card {
            background: white;
            border: 2px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 2rem;
            text-align: center;
            transition: all 0.3s ease;
            cursor: pointer;
        }
        
        .service-card:hover {
            border-color: var(--color-primary);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        
        .service-card-icon {
            width: 70px;
            height: 70px;
            margin: 0 auto 1.25rem;
            background: var(--color-accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .service-card-icon i {
            font-size: 2rem;
            color: var(--color-primary);
        }
        
        .service-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--color-dark);
        }
        
        .service-card p {
            font-size: 0.95rem;
            color: var(--color-text-light);
            line-height: 1.6;
            margin-bottom: 1rem;
        }
        
        .service-badge {
            display: inline-block;
            background: var(--color-primary);
            color: white;
            padding: 0.3rem 0.8rem;
            border-radius: 12px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        
        /* Scenario Demo */
        .scenario-section {
            background: var(--color-dark);
            color: white;
        }
        
        .scenario-section .section-title {
            color: white;
        }
        
        .scenario-section .section-desc {
            color: rgba(255,255,255,0.8);
        }
        
        .scenario-steps {
            max-width: 1100px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 2rem;
        }
        
        .scenario-step {
            position: relative;
            padding: 2rem;
            background: rgba(255,255,255,0.05);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255,255,255,0.1);
            backdrop-filter: blur(10px);
        }
        
        .step-number {
            position: absolute;
            top: -15px;
            left: 2rem;
            width: 36px;
            height: 36px;
            background: var(--color-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
        }
        
        .scenario-step h4 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            padding-top: 1rem;
        }
        
        .scenario-step p {
            font-size: 0.95rem;
            line-height: 1.6;
            color: rgba(255,255,255,0.85);
        }
        
        /* Collections Section */
        .collections-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: 2rem;
            max-width: 1280px;
            margin: 0 auto;
        }
        
        .collection-card {
            background: white;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }
        
        .collection-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-5px);
        }
        
        .collection-image {
            width: 100%;
            height: 200px;
            background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 3rem;
            color: white;
        }
        
        .collection-content {
            padding: 1.75rem;
        }
        
        .collection-meta {
            display: flex;
            gap: 0.75rem;
            margin-bottom: 1rem;
        }
        
        .collection-tag {
            background: var(--color-accent);
            color: var(--color-primary);
            padding: 0.3rem 0.75rem;
            border-radius: 12px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        
        .collection-card h3 {
            font-size: 1.35rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--color-dark);
        }
        
        .collection-card p {
            font-size: 0.95rem;
            color: var(--color-text-light);
            line-height: 1.6;
            margin-bottom: 1.25rem;
        }
        
        .collection-stats {
            display: flex;
            gap: 1.5rem;
            padding-top: 1rem;
            border-top: 1px solid var(--color-border);
        }
        
        .stat-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            color: var(--color-text-light);
        }
        
        .stat-item i {
            color: var(--color-primary);
        }
        
        /* Content List */
        .content-section {
            background: var(--color-bg-light;
        }
        
        .content-layout {
            max-width: 1280px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 2.5rem;
        }
        
        .content-list {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        
        .content-item {
            background: white;
            border-radius: var(--radius-md);
            padding: 1.75rem;
            display: flex;
            gap: 1.5rem;
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }
        
        .content-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(5px);
        }
        
        .content-index {
            flex-shrink: 0;
            width: 45px;
            height: 45px;
            background: var(--color-accent);
            color: var(--color-primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
        }
        
        .content-body {
            flex: 1;
        }
        
        .content-item h4 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--color-dark);
        }
        
        .content-item h4 a {
            color: var(--color-dark);
        }
        
        .content-item h4 a:hover {
            color: var(--color-primary);
        }
        
        .content-excerpt {
            font-size: 0.95rem;
            color: var(--color-text-light);
            line-height: 1.6;
            margin-bottom: 0.75rem;
        }
        
        .content-meta-info {
            display: flex;
            gap: 1.25rem;
            font-size: 0.85rem;
            color: var(--color-text-light);
        }
        
        .content-meta-info span {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        
        .content-sidebar {
            position: sticky;
            top: 100px;
            height: fit-content;
        }
        
        .sidebar-widget {
            background: white;
            border-radius: var(--radius-md);
            padding: 1.75rem;
            box-shadow: var(--shadow-sm);
            margin-bottom: 1.5rem;
        }
        
        .sidebar-widget h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
            color: var(--color-dark);
        }
        
        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        
        .sidebar-list-item {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.75rem;
            border-radius: var(--radius-sm);
            background: var(--color-bg-light);
            transition: all 0.3s ease;
        }
        
        .sidebar-list-item:hover {
            background: var(--color-accent);
            transform: translateX(3px);
        }
        
        .sidebar-list-icon {
            width: 32px;
            height: 32px;
            background: var(--color-primary);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 0.9rem;
        }
        
        .sidebar-list-text {
            flex: 1;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-text);
        }
        
        /* Version Update */
        .version-section {
            background: white;
        }
        
        .version-timeline {
            max-width: 900px;
            margin: 0 auto;
        }
        
        .version-item {
            display: flex;
            gap: 2rem;
            margin-bottom: 2.5rem;
            position: relative;
        }
        
        .version-item::before {
            content: '';
            position: absolute;
            left: 31px;
            top: 50px;
            bottom: -30px;
            width: 2px;
            background: var(--color-border);
        }
        
        .version-item:last-child::before {
            display: none;
        }
        
        .version-badge {
            flex-shrink: 0;
            width: 64px;
            height: 64px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: var(--shadow-md);
            z-index: 1;
            position: relative;
        }
        
        .version-content {
            flex: 1;
            background: var(--color-bg-light);
            border-radius: var(--radius-md);
            padding: 2rem;
        }
        
        .version-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 1rem;
        }
        
        .version-title {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--color-dark);
        }
        
        .version-date {
            font-size: 0.9rem;
            color: var(--color-text-light);
        }
        
        .version-features {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        
        .version-feature {
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            font-size: 0.95rem;
            line-height: 1.6;
            color: var(--color-text);
        }
        
        .version-feature i {
            color: var(--color-primary);
            margin-top: 0.25rem;
        }
        
        /* FAQ Section */
        .faq-section {
            background: var(--color-bg-light);
        }
        
        .faq-container {
            max-width: 900px;
            margin: 0 auto;
        }
        
        .faq-item {
            background: white;
            border-radius: var(--radius-md);
            padding: 2rem;
            margin-bottom: 1.25rem;
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }
        
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        
        .faq-question {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            margin-bottom: 1rem;
        }
        
        .faq-icon {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            background: var(--color-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 700;
            font-size: 1rem;
        }
        
        .faq-question h4 {
            flex: 1;
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-dark);
            line-height: 1.5;
        }
        
        .faq-answer {
            padding-left: 3rem;
            font-size: 1rem;
            color: var(--color-text-light);
            line-height: 1.7;
        }
        
        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-secondary) 100%);
            color: white;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -10%;
            width: 600px;
            height: 600px;
            background: rgba(255,255,255,0.03);
            border-radius: 50%;
        }
        
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: rgba(255,255,255,0.03);
            border-radius: 50%;
        }
        
        .cta-content {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }
        
        .cta-section .section-title {
            color: white;
            font-size: 2.8rem;
        }
        
        .cta-section .section-desc {
            color: rgba(255,255,255,0.9);
            font-size: 1.2rem;
            margin-bottom: 2.5rem;
        }
        
        .cta-actions {
            display: flex;
            gap: 1.25rem;
            justify-content: center;
        }
        
        .btn-cta-large {
            padding: 1rem 2.5rem;
            border-radius: 30px;
            font-size: 1.1rem;
            font-weight: 700;
        }
        
        .btn-cta-white {
            background: white;
            color: var(--color-primary);
        }
        
        .btn-cta-white:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.3);
        }
        
        .btn-cta-outline {
            background: transparent;
            color: white;
            border: 2px solid white;
        }
        
        .btn-cta-outline:hover {
            background: white;
            color: var(--color-primary);
        }
        
        /* Footer */
        .site-footer {
            background: var(--color-dark);
            color: rgba(255,255,255,0.8);
            padding: 3.5rem 1.5rem 1.5rem;
        }
        
        .footer-main {
            max-width: 1280px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 3rem;
            margin-bottom: 2.5rem;
        }
        
        .footer-brand h3 {
            color: white;
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        
        .footer-brand p {
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 1.5rem;
        }
        
        .footer-social {
            display: flex;
            gap: 0.75rem;
        }
        
        .social-link {
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            transition: all 0.3s ease;
        }
        
        .social-link:hover {
            background: var(--color-primary);
            transform: translateY(-3px);
        }
        
        .footer-column h4 {
            color: white;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
        }
        
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        
        .footer-links a {
            color: rgba(255,255,255,0.7);
            font-size: 0.95rem;
            transition: all 0.3s ease;
        }
        
        .footer-links a:hover {
            color: white;
            padding-left: 0.5rem;
        }
        
        .footer-bottom {
            max-width: 1280px;
            margin: 0 auto;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
        }
        
        /* Floating CTA Bar */
        .floating-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: white;
            box-shadow: 0 -4px 20px rgba(0,0,0,0.15);
            padding: 1rem 1.5rem;
            z-index: 999;
            transform: translateY(100%);
            transition: transform 0.4s ease;
        }
        
        .floating-cta.visible {
            transform: translateY(0);
        }
        
        .floating-cta-content {
            max-width: 1280px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        .floating-cta-text h5 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 0.25rem;
        }
        
        .floating-cta-text p {
            font-size: 0.9rem;
            color: var(--color-text-light);
        }
        
        .floating-cta-action .btn-primary {
            padding: 0.75rem 2rem;
        }
        
        /* Responsive */
        @media (max-width: 1024px) {
            .bento-grid {
                grid-template-columns: 1fr;
            }
            
            .bento-main,
            .bento-side {
                grid-column: span 1;
            }
            
            .content-layout {
                grid-template-columns: 1fr;
            }
            
            .content-sidebar {
                position: static;
            }
            
            .footer-main {
                grid-template-columns: 1fr 1fr;
            }
        }
        
        @media (max-width: 768px) {
            .nav-tabs {
                display: none;
            }
            
            .nav-cta {
                flex-direction: column;
                gap: 0.5rem;
            }
            
            .bento-main h1 {
                font-size: 2rem;
            }
            
            .bento-main p {
                font-size: 1rem;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .hero-actions {
                flex-direction: column;
            }
            
            .features-grid,
            .service-grid,
            .collections-grid {
                grid-template-columns: 1fr;
            }
            
            .scenario-steps {
                grid-template-columns: 1fr;
            }
            
            .cta-actions {
                flex-direction: column;
            }
            
            .footer-main {
                grid-template-columns: 1fr;
            }
            
            .floating-cta-content {
                flex-direction: column;
                gap: 1rem;
                text-align: center;
            }
        }
        
        @media (max-width: 520px) {
            .bento-main,
            .bento-card {
                padding: 1.5rem;
            }
            
            section {
                padding: 3rem 1rem;
            }
            
            .feature-card,
            .service-card {
                padding: 1.5rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary-color: #E63946;
            --primary-dark: #C2303A;
            --secondary-color: #F1FAEE;
            --accent-color: #FFD60A;
            --text-primary: #1D3557;
            --text-secondary: #457B9D;
            --text-muted: #6C757D;
            --bg-white: #FFFFFF;
            --bg-light: #F8F9FA;
            --bg-dark: #1D3557;
            --border-color: #E9ECEF;
            --shadow-sm: 0 2px 8px rgba(29,53,87,0.08);
            --shadow-md: 0 4px 16px rgba(29,53,87,0.12);
            --shadow-lg: 0 8px 32px rgba(29,53,87,0.16);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --spacing-unit: 1rem;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-white);
            font-size: 16px;
        }
        
        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        button, input, textarea, select {
            font-family: inherit;
            font-size: inherit;
        }
        
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* Header & Navigation */
        .site-header {
            background: var(--bg-white);
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
        }
        
        .nav-wrapper {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            gap: 2rem;
        }
        
        .site-logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary-color);
            white-space: nowrap;
            flex-shrink: 0;
        }
        
        .site-logo:hover {
            color: var(--primary-dark);
        }
        
        .nav-tabs {
            display: flex;
            gap: 0.5rem;
            flex: 1;
            justify-content: center;
            flex-wrap: wrap;
        }
        
        .nav-tabs a {
            padding: 0.5rem 1.25rem;
            border-radius: 24px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            transition: all 0.3s ease;
            border: 1px solid transparent;
        }
        
        .nav-tabs a:hover {
            background: var(--bg-light);
            color: var(--text-primary);
        }
        
        .nav-tabs a.active {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }
        
        .nav-cta {
            display: flex;
            gap: 0.75rem;
            flex-shrink: 0;
        }
        
        .btn-primary, .btn-secondary {
            padding: 0.6rem 1.5rem;
            border-radius: 24px;
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            white-space: nowrap;
        }
        
        .btn-primary {
            background: var(--primary-color);
            color: white;
        }
        
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        
        .btn-secondary {
            background: transparent;
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
        }
        
        .btn-secondary:hover {
            background: var(--bg-light);
            color: var(--text-primary);
        }
        
        /* Hero Section */
        .hero-section {
            position: relative;
            height: 520px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #2A4A6A 100%);
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .hero-video-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(29,53,87,0.85) 0%, rgba(42,74,106,0.75) 100%);
            z-index: 1;
        }
        
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            padding: 0 20px;
        }
        
        .hero-badge {
            display: inline-block;
            padding: 0.5rem 1.25rem;
            background: rgba(255,214,10,0.2);
            color: var(--accent-color);
            border-radius: 24px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            border: 1px solid rgba(255,214,10,0.3);
        }
        
        .hero-content h1 {
            font-size: 3rem;
            font-weight: 800;
            color: white;
            margin-bottom: 1.25rem;
            line-height: 1.2;
        }
        
        .hero-content p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.9);
            margin-bottom: 2.5rem;
            line-height: 1.8;
        }
        
        .hero-actions {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }
        
        .btn-hero-primary {
            padding: 1rem 2.5rem;
            background: var(--primary-color);
            color: white;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1.05rem;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .btn-hero-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 12px 28px rgba(230,57,70,0.4);
        }
        
        .btn-hero-secondary {
            padding: 1rem 2.5rem;
            background: rgba(255,255,255,0.15);
            color: white;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1.05rem;
            border: 2px solid rgba(255,255,255,0.3);
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            backdrop-filter: blur(10px);
        }
        
        .btn-hero-secondary:hover {
            background: rgba(255,255,255,0.25);
            border-color: rgba(255,255,255,0.5);
        }
        
        .play-icon {
            width: 60px;
            height: 60px;
            background: rgba(230,57,70,0.9);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            z-index: 3;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 8px 24px rgba(230,57,70,0.4);
        }
        
        .play-icon:hover {
            transform: translate(-50%, -50%) scale(1.1);
            background: var(--primary-color);
        }
        
        .play-icon i {
            color: white;
            font-size: 1.5rem;
            margin-left: 3px;
        }
        
        /* Features Grid */
        .features-section {
            padding: 5rem 0;
            background: var(--bg-light);
        }
        
        .section-header {
            text-align: center;
            margin-bottom: 3.5rem;
        }
        
        .section-label {
            display: inline-block;
            padding: 0.4rem 1rem;
            background: rgba(230,57,70,0.1);
            color: var(--primary-color);
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }
        
        .section-header h2 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }
        
        .section-header p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
        }
        
        .feature-card {
            background: white;
            padding: 2.5rem;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
            border: 1px solid var(--border-color);
        }
        
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-color);
        }
        
        .feature-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, var(--primary-color), #FF6B7A);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
        }
        
        .feature-icon i {
            font-size: 1.75rem;
            color: white;
        }
        
        .feature-card h3 {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }
        
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
        
        /* Plans Section */
        .plans-section {
            padding: 5rem 0;
            background: white;
        }
        
        .plans-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }
        
        .plan-card {
            background: white;
            border: 2px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            transition: all 0.3s ease;
            position: relative;
        }
        
        .plan-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }
        
        .plan-card.featured {
            border-color: var(--primary-color);
            box-shadow: var(--shadow-md);
            background: linear-gradient(180deg, #FFF5F6 0%, white 100%);
        }
        
        .plan-badge {
            position: absolute;
            top: -12px;
            right: 20px;
            background: var(--primary-color);
            color: white;
            padding: 0.4rem 1rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
        }
        
        .plan-card h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }
        
        .plan-price {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-color);
            margin: 1.5rem 0;
        }
        
        .plan-price span {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-muted);
        }
        
        .plan-features {
            list-style: none;
            margin: 2rem 0;
        }
        
        .plan-features li {
            padding: 0.75rem 0;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        
        .plan-features li i {
            color: var(--primary-color);
            font-size: 1.1rem;
        }
        
        .plan-cta {
            width: 100%;
            padding: 1rem;
            background: var(--text-primary);
            color: white;
            border: none;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .plan-cta:hover {
            background: var(--primary-color);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        
        .plan-card.featured .plan-cta {
            background: var(--primary-color);
        }
        
        .plan-card.featured .plan-cta:hover {
            background: var(--primary-dark);
        }
        
        /* Device Support */
        .devices-section {
            padding: 5rem 0;
            background: var(--bg-dark);
            color: white;
        }
        
        .devices-section .section-header h2,
        .devices-section .section-header p {
            color: white;
        }
        
        .devices-section .section-label {
            background: rgba(255,214,10,0.2);
            color: var(--accent-color);
        }
        
        .devices-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }
        
        .device-card {
            text-align: center;
            padding: 2rem;
            background: rgba(255,255,255,0.05);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255,255,255,0.1);
            transition: all 0.3s ease;
        }
        
        .device-card:hover {
            background: rgba(255,255,255,0.1);
            transform: translateY(-6px);
        }
        
        .device-icon {
            font-size: 3.5rem;
            color: var(--accent-color);
            margin-bottom: 1.5rem;
        }
        
        .device-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
        
        .device-card p {
            font-size: 0.95rem;
            color: rgba(255,255,255,0.7);
        }
        
        /* Process Steps */
        .process-section {
            padding: 5rem 0;
            background: white;
        }
        
        .process-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-top: 3rem;
            position: relative;
        }
        
        .step-card {
            text-align: center;
            position: relative;
        }
        
        .step-number {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, var(--primary-color), #FF6B7A);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            font-size: 1.75rem;
            font-weight: 800;
            color: white;
            box-shadow: var(--shadow-md);
        }
        
        .step-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }
        
        .step-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
        
        /* FAQ Section */
        .faq-section {
            padding: 5rem 0;
            background: var(--bg-light);
        }
        
        .faq-container {
            max-width: 900px;
            margin: 3rem auto 0;
        }
        
        .faq-item {
            background: white;
            border-radius: var(--radius-md);
            margin-bottom: 1.5rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
        }
        
        .faq-question {
            padding: 1.75rem 2rem;
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: all 0.3s ease;
        }
        
        .faq-question:hover {
            color: var(--primary-color);
        }
        
        .faq-question i {
            font-size: 1.25rem;
            color: var(--primary-color);
            transition: transform 0.3s ease;
        }
        
        .faq-answer {
            padding: 0 2rem 1.75rem 2rem;
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.8;
        }
        
        /* CTA Section */
        .cta-section {
            padding: 5rem 0;
            background: linear-gradient(135deg, var(--primary-color) 0%, #FF6B7A 100%);
            text-align: center;
            color: white;
        }
        
        .cta-content h2 {
            font-size: 2.75rem;
            font-weight: 800;
            margin-bottom: 1.25rem;
        }
        
        .cta-content p {
            font-size: 1.15rem;
            margin-bottom: 2.5rem;
            opacity: 0.95;
        }
        
        .cta-button {
            padding: 1.1rem 3rem;
            background: white;
            color: var(--primary-color);
            border: none;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.75rem;
        }
        
        .cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 28px rgba(0,0,0,0.2);
        }
        
        /* Footer */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 4rem 0 2rem;
        }
        
        .footer-main {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 3rem;
            margin-bottom: 3rem;
        }
        
        .footer-brand h3 {
            font-size: 1.35rem;
            font-weight: 700;
            color: white;
            margin-bottom: 1rem;
        }
        
        .footer-brand p {
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 1.5rem;
            opacity: 0.8;
        }
        
        .footer-social {
            display: flex;
            gap: 1rem;
        }
        
        .footer-social a {
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }
        
        .footer-social a:hover {
            background: var(--primary-color);
            transform: translateY(-3px);
        }
        
        .footer-col h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: white;
            margin-bottom: 1.25rem;
        }
        
        .footer-col ul {
            list-style: none;
        }
        
        .footer-col ul li {
            margin-bottom: 0.75rem;
        }
        
        .footer-col ul li a {
            font-size: 0.95rem;
            opacity: 0.8;
            transition: all 0.3s ease;
        }
        
        .footer-col ul li a:hover {
            opacity: 1;
            color: var(--accent-color);
            padding-left: 5px;
        }
        
        .footer-bottom {
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
        }
        
        .footer-bottom p {
            font-size: 0.9rem;
            opacity: 0.7;
        }
        
        /* Responsive */
        @media (max-width: 1024px) {
            .nav-wrapper {
                flex-wrap: wrap;
                height: auto;
                padding: 1rem 20px;
            }
            
            .nav-tabs {
                order: 3;
                width: 100%;
                justify-content: flex-start;
                margin-top: 1rem;
            }
            
            .footer-main {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        
        @media (max-width: 768px) {
            .hero-content h1 {
                font-size: 2.25rem;
            }
            
            .hero-content p {
                font-size: 1rem;
            }
            
            .hero-section {
                height: 450px;
            }
            
            .section-header h2 {
                font-size: 2rem;
            }
            
            .features-grid,
            .plans-grid,
            .devices-grid,
            .process-steps {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            
            .footer-main {
                grid-template-columns: 1fr;
            }
            
            .nav-cta {
                gap: 0.5rem;
            }
            
            .btn-primary, .btn-secondary {
                padding: 0.5rem 1rem;
                font-size: 0.85rem;
            }
        }
        
        @media (max-width: 520px) {
            .site-logo {
                font-size: 1.1rem;
            }
            
            .hero-content h1 {
                font-size: 1.85rem;
            }
            
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            
            .btn-hero-primary,
            .btn-hero-secondary {
                width: 100%;
                justify-content: center;
            }
            
            .plan-price {
                font-size: 2.5rem;
            }
            
            .cta-content h2 {
                font-size: 2rem;
            }
        }