/* roulang page: index */
:root {
            --color-primary: #1a73e8;
            --color-primary-dark: #1557b0;
            --color-primary-light: #e8f0fe;
            --color-accent: #0d9488;
            --color-accent-dark: #0f766e;
            --color-cta: #f97316;
            --color-cta-hover: #ea580c;
            --color-bg: #f8fafc;
            --color-surface: #ffffff;
            --color-text: #1e293b;
            --color-text-weak: #64748b;
            --color-text-muted: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.05);
            --shadow-xl: 0 20px 48px rgba(0,0,0,0.12), 0 8px 20px rgba(0,0,0,0.06);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.15s ease;
            --transition-normal: 0.25s ease;
            --transition-slow: 0.35s cubic-bezier(0.4,0,0.2,1);
            --max-width: 1200px;
            --header-height: 64px;
        }

        *, *::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: 1.6;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

        button, input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ul, ol {
            list-style: none;
        }

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

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border);
            height: var(--header-height);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-normal);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

        .header-inner {
            display: flex;
            align-items: center;
            height: 100%;
            gap: 16px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .header-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 800;
            flex-shrink: 0;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
        }

        .header-nav a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--color-text-weak);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .header-nav a:hover {
            color: var(--color-primary);
            background: var(--color-primary-light);
        }

        .header-nav a.active {
            color: var(--color-primary);
            background: var(--color-primary-light);
            font-weight: 600;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .header-search {
            position: relative;
            display: flex;
            align-items: center;
        }

        .header-search input {
            width: 180px;
            padding: 9px 14px 9px 38px;
            border: 1.5px solid var(--color-border);
            border-radius: 24px;
            font-size: 0.875rem;
            color: var(--color-text);
            background: var(--color-bg);
            transition: all var(--transition-fast);
        }

        .header-search input:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(26,115,232,0.1);
            width: 220px;
            background: var(--color-surface);
        }

        .header-search .search-icon {
            position: absolute;
            left: 13px;
            color: var(--color-text-muted);
            font-size: 0.85rem;
            pointer-events: none;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 7px;
            padding: 10px 22px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            line-height: 1.3;
        }

        .btn-outline {
            border: 1.5px solid var(--color-primary);
            color: var(--color-primary);
            background: transparent;
        }

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

        .btn-primary {
            background: var(--color-primary);
            color: #fff;
            box-shadow: 0 2px 8px rgba(26,115,232,0.3);
        }

        .btn-primary:hover {
            background: var(--color-primary-dark);
            box-shadow: 0 4px 16px rgba(26,115,232,0.4);
            transform: translateY(-1px);
        }

        .btn-cta {
            background: var(--color-cta);
            color: #fff;
            box-shadow: 0 2px 10px rgba(249,115,22,0.35);
        }

        .btn-cta:hover {
            background: var(--color-cta-hover);
            box-shadow: 0 4px 18px rgba(249,115,22,0.45);
            transform: translateY(-1px);
        }

        .btn-lg {
            padding: 13px 30px;
            font-size: 1rem;
            border-radius: 28px;
        }

        .btn-xl {
            padding: 15px 36px;
            font-size: 1.05rem;
            border-radius: 30px;
        }

        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            z-index: 1001;
        }

        .mobile-menu-toggle span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--color-text);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        .mobile-menu-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .mobile-menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-menu-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* Hero Section */
        .hero {
            position: relative;
            padding: 80px 0 90px;
            background: linear-gradient(160deg, #f0f6ff 0%, #f8fafc 40%, #f0fdf9 100%);
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -120px;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(26,115,232,0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -80px;
            width: 350px;
            height: 350px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(13,148,136,0.06) 0%, transparent 70%);
            pointer-events: none;
        }

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

        .hero-content {
            max-width: 560px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            background: var(--color-primary-light);
            color: var(--color-primary);
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: 0.3px;
        }

        .hero-badge .badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-success);
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.3); }
        }

        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--color-text);
            letter-spacing: -0.5px;
            margin-bottom: 18px;
        }

        .hero h1 .highlight {
            color: var(--color-primary);
            position: relative;
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--color-text-weak);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 480px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 28px;
        }

        .hero-trust {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--color-text-muted);
        }

        .hero-trust .trust-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .hero-trust .trust-item i {
            color: var(--color-success);
            font-size: 0.9rem;
        }

        .hero-visual {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-visual .hero-image-wrap {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-xl);
            background: var(--color-surface);
            aspect-ratio: 4/3;
            width: 100%;
            max-width: 480px;
        }

        .hero-visual .hero-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        .hero-float-card {
            position: absolute;
            background: var(--color-surface);
            border-radius: var(--radius-md);
            padding: 14px 18px;
            box-shadow: var(--shadow-lg);
            font-size: 0.85rem;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 10px;
            animation: float-card 4s ease-in-out infinite;
        }

        .hero-float-card.card-top {
            top: 14px;
            right: -20px;
            animation-delay: 0s;
        }

        .hero-float-card.card-bottom {
            bottom: 20px;
            left: -24px;
            animation-delay: 2s;
        }

        .hero-float-card .float-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            flex-shrink: 0;
        }

        .hero-float-card .float-icon.green {
            background: #d1fae5;
            color: #059669;
        }

        .hero-float-card .float-icon.blue {
            background: #dbeafe;
            color: #2563eb;
        }

        @keyframes float-card {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-10px); }
        }

        /* Section Common */
        .section {
            padding: 72px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-label {
            display: inline-block;
            font-size: 0.83rem;
            font-weight: 700;
            color: var(--color-primary);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 10px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 750;
            color: var(--color-text);
            letter-spacing: -0.3px;
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 1.02rem;
            color: var(--color-text-weak);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.65;
        }

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

        .feature-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-slow);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            opacity: 0;
            transition: opacity var(--transition-slow);
            border-radius: 0 0 var(--radius-sm) var(--radius-sm);
        }

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

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 18px;
            flex-shrink: 0;
        }

        .feature-icon.blue {
            background: #eff6ff;
            color: #3b82f6;
        }

        .feature-icon.teal {
            background: #f0fdfa;
            color: #14b8a6;
        }

        .feature-icon.amber {
            background: #fffbeb;
            color: #f59e0b;
        }

        .feature-icon.indigo {
            background: #eef2ff;
            color: #6366f1;
        }

        .feature-icon.rose {
            background: #fff1f2;
            color: #f43f5e;
        }

        .feature-icon.emerald {
            background: #ecfdf5;
            color: #10b981;
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.6;
        }

        /* Category Cards */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

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

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

        .category-card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
        }

        .category-card-body {
            padding: 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .category-card-body h3 {
            font-size: 1.18rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 6px;
        }

        .category-card-body p {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.55;
            flex: 1;
            margin-bottom: 14px;
        }

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

        .category-card-link:hover {
            gap: 10px;
        }

        /* Info List */
        .info-list-section {
            background: var(--color-surface);
            border-radius: var(--radius-xl);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }

        .info-list-header {
            padding: 22px 28px;
            border-bottom: 1px solid var(--color-border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .info-list-header h2 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-text);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .info-list-header h2 i {
            color: var(--color-primary);
            font-size: 1rem;
        }

        .info-list-tag {
            font-size: 0.8rem;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 14px;
            background: var(--color-primary-light);
            color: var(--color-primary);
        }

        .info-list-items {
            padding: 0;
        }

        .info-list-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 28px;
            border-bottom: 1px solid var(--color-border-light);
            transition: background var(--transition-fast);
            flex-wrap: wrap;
        }

        .info-list-item:last-child {
            border-bottom: none;
        }

        .info-list-item:hover {
            background: #fafcfd;
        }

        .info-list-item .item-date {
            font-size: 0.82rem;
            color: var(--color-text-muted);
            white-space: nowrap;
            min-width: 80px;
        }

        .info-list-item .item-title {
            flex: 1;
            font-weight: 500;
            color: var(--color-text);
            font-size: 0.95rem;
            line-height: 1.4;
            transition: color var(--transition-fast);
            min-width: 200px;
        }

        .info-list-item:hover .item-title {
            color: var(--color-primary);
        }

        .info-list-item .item-category {
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 12px;
            background: #f1f5f9;
            color: var(--color-text-weak);
            white-space: nowrap;
        }

        .info-list-empty {
            padding: 48px 28px;
            text-align: center;
            color: var(--color-text-muted);
            font-size: 0.95rem;
        }

        /* Steps / Process */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            position: relative;
        }

        .steps-grid::before {
            content: '';
            position: absolute;
            top: 44px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: var(--color-border);
            z-index: 0;
        }

        .step-item {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 16px;
        }

        .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--color-surface);
            border: 3px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--color-primary);
            margin: 0 auto 16px;
            transition: all var(--transition-normal);
            position: relative;
        }

        .step-item:hover .step-number {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 10px rgba(26,115,232,0.06);
            transform: scale(1.06);
        }

        .step-item h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 6px;
        }

        .step-item p {
            font-size: 0.84rem;
            color: var(--color-text-weak);
            line-height: 1.5;
        }

        /* Stats */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }

        .stat-item {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 28px 18px;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-normal);
        }

        .stat-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -1px;
            line-height: 1;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--color-text-weak);
        }

        /* FAQ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

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

        .faq-question {
            width: 100%;
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            font-weight: 650;
            font-size: 0.98rem;
            color: var(--color-text);
            text-align: left;
            background: transparent;
            transition: color var(--transition-fast);
        }

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

        .faq-question i {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            transition: transform var(--transition-fast);
        }

        .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.65;
            display: none;
        }

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

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

        .faq-item.open {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-md);
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #1a3a5c 0%, #1e4d7b 40%, #1a6b5a 100%);
            color: #fff;
            text-align: center;
            padding: 64px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: 1.9rem;
            font-weight: 750;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }

        .cta-section p {
            font-size: 1.02rem;
            opacity: 0.88;
            max-width: 520px;
            margin: 0 auto 28px;
            line-height: 1.6;
        }

        .cta-section .btn-cta {
            background: #fff;
            color: #1a3a5c;
            box-shadow: 0 4px 18px rgba(0,0,0,0.2);
        }

        .cta-section .btn-cta:hover {
            background: #f0f4f8;
            box-shadow: 0 6px 24px rgba(0,0,0,0.28);
        }

        /* Footer */
        .site-footer {
            background: #1e293b;
            color: #cbd5e1;
            padding: 48px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-brand h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }

        .footer-brand p {
            font-size: 0.88rem;
            color: #94a3b8;
            line-height: 1.6;
        }

        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: #e2e8f0;
            margin-bottom: 14px;
            letter-spacing: 0.4px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            font-size: 0.86rem;
            color: #94a3b8;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 20px;
            display: flex;
            justify-content: center;
            font-size: 0.83rem;
            color: #64748b;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 36px;
                text-align: center;
            }
            .hero-content {
                max-width: 100%;
            }
            .hero-desc {
                max-width: 100%;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-trust {
                justify-content: center;
            }
            .hero-visual .hero-image-wrap {
                max-width: 380px;
                margin: 0 auto;
            }
            .hero-float-card.card-top {
                right: 0;
                top: 0;
            }
            .hero-float-card.card-bottom {
                left: 0;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
            .steps-grid::before {
                display: none;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
            .header-nav {
                gap: 2px;
            }
            .header-nav a {
                padding: 8px 10px;
                font-size: 0.85rem;
            }
            .header-search input {
                width: 140px;
            }
            .header-search input:focus {
                width: 170px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                gap: 10px;
            }
            .header-nav {
                display: none;
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--color-surface);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-lg);
                z-index: 999;
            }
            .header-nav.open {
                display: flex;
            }
            .header-nav a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 0.95rem;
            }
            .header-actions {
                gap: 6px;
            }
            .header-search input {
                width: 120px;
                font-size: 0.8rem;
                padding: 8px 10px 8px 32px;
            }
            .header-search input:focus {
                width: 150px;
            }
            .header-search .search-icon {
                left: 10px;
                font-size: 0.75rem;
            }
            .btn {
                padding: 8px 14px;
                font-size: 0.8rem;
                border-radius: 20px;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .hero {
                padding: 48px 0 56px;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .hero-float-card {
                display: none;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .category-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .info-list-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
                padding: 14px 20px;
            }
            .info-list-item .item-date {
                min-width: auto;
            }
            .info-list-item .item-title {
                min-width: auto;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .container {
                padding: 0 16px;
            }
        }

        @media (max-width: 520px) {
            .header-logo {
                font-size: 1rem;
            }
            .header-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.85rem;
            }
            .header-search {
                display: none;
            }
            .btn {
                padding: 7px 12px;
                font-size: 0.78rem;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero-desc {
                font-size: 0.88rem;
            }
            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-number {
                font-size: 1.5rem;
            }
            .stat-label {
                font-size: 0.78rem;
            }
            .feature-card {
                padding: 22px 18px;
            }
            .btn-lg {
                padding: 11px 22px;
                font-size: 0.9rem;
            }
            .btn-xl {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
        }

/* roulang page: article */
:root {
            --color-primary: #1B3A5C;
            --color-primary-light: #2C5F8A;
            --color-primary-dark: #0F2440;
            --color-accent: #C8963E;
            --color-accent-light: #D9B06A;
            --color-accent-dark: #A0722E;
            --color-bg: #F7F8FA;
            --color-surface: #FFFFFF;
            --color-text: #1A1A1A;
            --color-text-secondary: #6B7280;
            --color-text-muted: #9CA3AF;
            --color-border: #E5E7EB;
            --color-border-light: #F0F1F3;
            --color-success: #10B981;
            --color-warning: #F59E0B;
            --color-danger: #EF4444;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.08);
            --shadow-xl: 0 16px 48px rgba(0,0,0,0.10);
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing-md: 16px;
            --spacing-lg: 24px;
            --spacing-xl: 32px;
            --spacing-2xl: 48px;
            --spacing-3xl: 64px;
            --spacing-4xl: 80px;
            --max-width: 1200px;
            --max-width-article: 780px;
            --transition-fast: 0.15s ease;
            --transition-normal: 0.25s ease;
            --transition-slow: 0.35s ease;
        }

        *, *::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: 1.6;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

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

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

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        input {
            font-family: inherit;
            font-size: inherit;
        }

        ul, ol {
            list-style: none;
        }

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

        .container-narrow {
            width: 100%;
            max-width: var(--max-width-article);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }

        /* ========== HEADER ========== */
        .site-header {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--spacing-md) 0;
            min-height: 60px;
            gap: var(--spacing-lg);
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-shrink: 0;
        }

        .header-logo a {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--color-primary);
            letter-spacing: 0.02em;
            transition: opacity var(--transition-fast);
        }

        .header-logo a:hover {
            opacity: 0.85;
            color: var(--color-primary);
        }

        .header-logo-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
            flex-wrap: wrap;
        }

        .header-nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .header-nav a:hover {
            color: var(--color-primary);
            background: rgba(27,58,92,0.04);
        }

        .header-nav a.active {
            color: var(--color-primary);
            background: rgba(27,58,92,0.07);
            font-weight: 600;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-shrink: 0;
        }

        .btn-header {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
            gap: 6px;
        }

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

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

        .btn-header-outline {
            background: transparent;
            color: var(--color-primary);
            border: 2px solid var(--color-border);
        }

        .btn-header-outline:hover {
            border-color: var(--color-primary);
            background: rgba(27,58,92,0.03);
            color: var(--color-primary);
        }

        .mobile-menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: transparent;
            border: 1px solid var(--color-border);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .mobile-menu-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--color-text);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        .mobile-menu-toggle:hover {
            background: rgba(27,58,92,0.04);
            border-color: var(--color-primary);
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-bar {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            padding: var(--spacing-md) 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-size: 0.875rem;
            color: var(--color-text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--color-text-secondary);
            transition: color var(--transition-fast);
        }

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

        .breadcrumb .separator {
            color: var(--color-border);
            user-select: none;
        }

        .breadcrumb .current {
            color: var(--color-text);
            font-weight: 500;
        }

        /* ========== ARTICLE HEADER ========== */
        .article-header-section {
            background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%);
            padding: var(--spacing-2xl) 0 var(--spacing-xl);
            position: relative;
            overflow: hidden;
        }

        .article-header-section::before {
            content: '';
            position: absolute;
            top: 0;
            right: -120px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(200,150,62,0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .article-header-content {
            position: relative;
            z-index: 1;
        }

        .article-category-tag {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(200,150,62,0.1);
            color: var(--color-accent-dark);
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.03em;
            transition: all var(--transition-fast);
        }

        .article-category-tag:hover {
            background: rgba(200,150,62,0.18);
            color: var(--color-accent-dark);
        }

        .article-title {
            font-size: 2.25rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-primary-dark);
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.01em;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-lg);
            flex-wrap: wrap;
            color: var(--color-text-secondary);
            font-size: 0.9rem;
        }

        .article-meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta-dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--color-border);
        }

        /* ========== ARTICLE CONTENT ========== */
        .article-body-section {
            padding: var(--spacing-xl) 0 var(--spacing-3xl);
        }

        .article-featured-image {
            width: 100%;
            border-radius: var(--radius-lg);
            margin-bottom: var(--spacing-2xl);
            box-shadow: var(--shadow-lg);
            aspect-ratio: 16 / 9;
            object-fit: cover;
            background: linear-gradient(135deg, #e8ecf1 0%, #dce3ea 100%);
        }

        .article-content {
            font-size: 1.0625rem;
            line-height: 1.85;
            color: var(--color-text);
        }

        .article-content h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-primary-dark);
            margin: var(--spacing-2xl) 0 var(--spacing-md);
            padding-bottom: var(--spacing-sm);
            border-bottom: 2px solid var(--color-border-light);
            letter-spacing: 0.01em;
        }

        .article-content h3 {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--color-primary);
            margin: var(--spacing-xl) 0 var(--spacing-sm);
        }

        .article-content p {
            margin-bottom: var(--spacing-lg);
        }

        .article-content ul,
        .article-content ol {
            margin: var(--spacing-md) 0 var(--spacing-lg);
            padding-left: var(--spacing-xl);
            list-style: disc;
        }

        .article-content ol {
            list-style: decimal;
        }

        .article-content li {
            margin-bottom: var(--spacing-sm);
        }

        .article-content blockquote {
            border-left: 4px solid var(--color-accent);
            padding: var(--spacing-md) var(--spacing-lg);
            margin: var(--spacing-xl) 0;
            background: rgba(200,150,62,0.04);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--color-text-secondary);
            font-style: italic;
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: var(--spacing-xl) auto;
            box-shadow: var(--shadow-md);
        }

        .article-content a {
            color: var(--color-primary);
            text-decoration: underline;
            text-decoration-color: var(--color-border);
            text-underline-offset: 3px;
            transition: all var(--transition-fast);
        }

        .article-content a:hover {
            color: var(--color-primary-light);
            text-decoration-color: var(--color-primary-light);
        }

        .article-content code {
            background: #f1f5f9;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--color-primary-dark);
            font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
        }

        .article-content pre {
            background: #1e293b;
            color: #e2e8f0;
            padding: var(--spacing-lg);
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: var(--spacing-xl) 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .article-content pre code {
            background: transparent;
            padding: 0;
            color: inherit;
        }

        /* ========== ARTICLE DIVIDER ========== */
        .article-divider {
            border: none;
            height: 1px;
            background: var(--color-border-light);
            margin: var(--spacing-2xl) 0;
        }

        /* ========== ARTICLE TAGS ========== */
        .article-tags {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
            padding: var(--spacing-lg) 0;
        }

        .article-tags-label {
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            margin-right: var(--spacing-xs);
        }

        .article-tag {
            display: inline-flex;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            background: var(--color-bg);
            color: var(--color-text-secondary);
            border: 1px solid var(--color-border);
            transition: all var(--transition-fast);
        }

        .article-tag:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: rgba(27,58,92,0.03);
        }

        /* ========== NOT FOUND ========== */
        .not-found-section {
            padding: var(--spacing-4xl) 0;
            text-align: center;
            flex: 1;
        }

        .not-found-icon {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: rgba(27,58,92,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--spacing-lg);
            font-size: 2rem;
        }

        .not-found-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--color-primary-dark);
            margin-bottom: var(--spacing-md);
        }

        .not-found-text {
            color: var(--color-text-secondary);
            margin-bottom: var(--spacing-xl);
            font-size: 1.05rem;
        }

        .btn-back-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            background: var(--color-primary);
            color: #fff;
            transition: all var(--transition-fast);
        }

        .btn-back-home:hover {
            background: var(--color-primary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        /* ========== RELATED ARTICLES ========== */
        .related-section {
            padding: var(--spacing-2xl) 0 var(--spacing-3xl);
            background: var(--color-surface);
            border-top: 1px solid var(--color-border-light);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            background: rgba(27,58,92,0.07);
            color: var(--color-primary);
            margin-bottom: var(--spacing-sm);
        }

        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--color-primary-dark);
            margin-bottom: var(--spacing-xl);
            letter-spacing: 0.01em;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }

        .related-card {
            background: var(--color-bg);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
            display: flex;
            flex-direction: column;
        }

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

        .related-card-image {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            background: linear-gradient(135deg, #e8ecf1 0%, #dce3ea 100%);
        }

        .related-card-body {
            padding: var(--spacing-lg);
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .related-card-category {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--color-accent-dark);
            letter-spacing: 0.03em;
        }

        .related-card-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--color-primary-dark);
            line-height: 1.4;
            transition: color var(--transition-fast);
        }

        .related-card:hover .related-card-title {
            color: var(--color-primary);
        }

        .related-card-excerpt {
            font-size: 0.875rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
            flex: 1;
        }

        .related-card-date {
            font-size: 0.8rem;
            color: var(--color-text-muted);
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: var(--spacing-3xl) 0;
            background: linear-gradient(160deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(200,150,62,0.12) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 650px;
            margin: 0 auto;
        }

        .cta-title {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.01em;
        }

        .cta-text {
            color: rgba(255,255,255,0.8);
            font-size: 1.05rem;
            margin-bottom: var(--spacing-xl);
            line-height: 1.7;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            background: var(--color-accent);
            color: #fff;
            transition: all var(--transition-fast);
            letter-spacing: 0.02em;
        }

        .btn-cta:hover {
            background: var(--color-accent-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(200,150,62,0.35);
        }

        .btn-cta-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.4);
            transition: all var(--transition-fast);
            letter-spacing: 0.02em;
            margin-left: var(--spacing-md);
        }

        .btn-cta-outline:hover {
            border-color: #fff;
            background: rgba(255,255,255,0.08);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--color-primary-dark);
            color: rgba(255,255,255,0.8);
            padding: var(--spacing-3xl) 0 var(--spacing-xl);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-2xl);
            padding-bottom: var(--spacing-2xl);
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }

        .footer-brand h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.02em;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.6);
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.03em;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .footer-col ul li a {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--color-accent-light);
            padding-left: 4px;
        }

        .footer-bottom {
            text-align: center;
            padding-top: var(--spacing-lg);
            font-size: 0.85rem;
            color: rgba(255,255,255,0.45);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .article-title {
                font-size: 1.85rem;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-xl);
            }
            .header-inner {
                flex-wrap: wrap;
            }
        }

        @media (max-width: 768px) {
            .header-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--color-surface);
                flex-direction: column;
                padding: var(--spacing-md);
                border-bottom: 2px solid var(--color-border-light);
                box-shadow: var(--shadow-lg);
                gap: 4px;
                z-index: 99;
            }
            .header-nav.mobile-open {
                display: flex;
            }
            .header-nav a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 0.95rem;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .header-actions {
                gap: var(--spacing-sm);
            }
            .btn-header-outline {
                display: none;
            }
            .article-title {
                font-size: 1.55rem;
            }
            .article-content {
                font-size: 1rem;
            }
            .article-content h2 {
                font-size: 1.35rem;
            }
            .article-content h3 {
                font-size: 1.15rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .cta-title {
                font-size: 1.5rem;
            }
            .btn-cta-outline {
                margin-left: 0;
                margin-top: var(--spacing-md);
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-xl);
            }
            .section-title {
                font-size: 1.4rem;
            }
            .container,
            .container-narrow {
                padding: 0 var(--spacing-md);
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
        }

        @media (max-width: 520px) {
            .article-title {
                font-size: 1.35rem;
            }
            .article-header-section {
                padding: var(--spacing-xl) 0 var(--spacing-lg);
            }
            .article-body-section {
                padding: var(--spacing-lg) 0 var(--spacing-xl);
            }
            .article-meta {
                gap: var(--spacing-md);
                font-size: 0.8rem;
            }
            .cta-section {
                padding: var(--spacing-2xl) 0;
            }
            .cta-title {
                font-size: 1.3rem;
            }
            .cta-text {
                font-size: 0.9rem;
            }
            .btn-cta,
            .btn-cta-outline {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .related-card-body {
                padding: var(--spacing-md);
            }
            .header-logo a {
                font-size: 1.05rem;
            }
            .btn-header-primary {
                padding: 8px 14px;
                font-size: 0.8rem;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #1e40af;
            --color-primary-light: #3b82f6;
            --color-primary-lighter: #60a5fa;
            --color-primary-dark: #1e3a8a;
            --color-primary-bg: #eff6ff;
            --color-accent: #059669;
            --color-accent-light: #10b981;
            --color-accent-lighter: #34d399;
            --color-accent-bg: #ecfdf5;
            --color-bg: #f8fafc;
            --color-bg-white: #ffffff;
            --color-bg-dark: #0f172a;
            --color-bg-card: #ffffff;
            --color-text: #1e293b;
            --color-text-secondary: #475569;
            --color-text-light: #64748b;
            --color-text-lighter: #94a3b8;
            --color-text-white: #f1f5f9;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-border-strong: #cbd5e1;
            --radius-xs: 6px;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.10), 0 4px 8px rgba(0, 0, 0, 0.05);
            --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.12), 0 8px 16px rgba(0, 0, 0, 0.06);
            --shadow-card-hover: 0 12px 28px rgba(0, 0, 0, 0.12), 0 6px 10px rgba(0, 0, 0, 0.06);
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --container-narrow: 960px;
            --header-height: 68px;
        }

        *,
        *::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: 1.65;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

        input {
            font-family: inherit;
            outline: none;
            border: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        .container-narrow {
            max-width: var(--container-narrow);
        }

        /* ========== HEADER & NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            box-shadow: var(--shadow-xs);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--color-primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .header-logo .logo-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }

        .header-nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .header-nav a:hover {
            color: var(--color-primary);
            background: var(--color-primary-bg);
        }

        .header-nav a.active {
            color: var(--color-primary);
            background: var(--color-primary-bg);
            font-weight: 600;
        }

        .header-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 3px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .header-search {
            display: flex;
            align-items: center;
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-xl);
            padding: 8px 14px;
            gap: 8px;
            transition: all var(--transition-fast);
            min-width: 180px;
        }

        .header-search:focus-within {
            border-color: var(--color-primary-light);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
            background: var(--color-bg-white);
        }

        .header-search svg {
            flex-shrink: 0;
            color: var(--color-text-lighter);
            width: 16px;
            height: 16px;
        }

        .header-search input {
            flex: 1;
            background: transparent;
            font-size: 0.9rem;
            color: var(--color-text);
            min-width: 0;
        }

        .header-search input::placeholder {
            color: var(--color-text-lighter);
        }

        .btn-header-login {
            padding: 9px 18px;
            border-radius: var(--radius-xl);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-primary);
            border: 1.5px solid var(--color-primary-light);
            background: transparent;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-header-login:hover {
            background: var(--color-primary-bg);
            border-color: var(--color-primary);
        }

        .btn-header-cta {
            padding: 9px 20px;
            border-radius: var(--radius-xl);
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            transition: all var(--transition-base);
            white-space: nowrap;
            box-shadow: 0 2px 8px rgba(30, 64, 175, 0.25);
        }

        .btn-header-cta:hover {
            box-shadow: 0 4px 16px rgba(30, 64, 175, 0.35);
            transform: translateY(-1px);
        }

        .btn-header-cta:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(30, 64, 175, 0.2);
        }

        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            z-index: 1001;
            background: none;
            border: none;
        }

        .mobile-menu-toggle span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--color-text);
            border-radius: 2px;
            transition: all var(--transition-base);
        }

        .mobile-menu-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .mobile-menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .mobile-menu-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ========== CATEGORY HERO ========== */
        .category-hero {
            position: relative;
            padding: 60px 0 70px;
            background: linear-gradient(160deg, #0f1d3d 0%, #15254d 30%, #1a3366 60%, #0f1d3d 100%);
            overflow: hidden;
            color: #fff;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, var(--color-bg) 0%, transparent 100%);
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .breadcrumb .separator {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.75rem;
        }

        .breadcrumb .current {
            color: #fff;
            font-weight: 500;
        }

        .category-hero-content {
            max-width: 700px;
        }

        .category-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 6px 14px;
            border-radius: var(--radius-xl);
            font-size: 0.82rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 18px;
            backdrop-filter: blur(4px);
        }

        .category-hero-badge .badge-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--color-accent-light);
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.4;
            }
        }

        .category-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
            color: #fff;
        }

        .category-hero h1 span {
            background: linear-gradient(135deg, #60a5fa, #a5f3fc);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .category-hero-desc {
            font-size: 1.08rem;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.7;
            max-width: 580px;
            margin-bottom: 28px;
        }

        .category-hero-stats {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }

        .category-hero-stat {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .category-hero-stat .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
        }

        .category-hero-stat .stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.4;
        }

        /* ========== MAIN CONTENT AREA ========== */
        .category-main {
            padding: 50px 0 70px;
        }

        .category-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 36px;
            align-items: start;
        }

        /* Article Cards */
        .article-list-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .article-list-header h2 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--color-text);
            letter-spacing: -0.01em;
        }

        .article-sort {
            display: flex;
            gap: 4px;
            background: var(--color-bg-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 3px;
        }

        .article-sort button {
            padding: 7px 14px;
            border-radius: var(--radius-xs);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--color-text-light);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .article-sort button.active {
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
            box-shadow: var(--shadow-sm);
        }

        .article-sort button:hover:not(.active) {
            color: var(--color-text);
            background: var(--color-border-light);
        }

        .article-cards {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .article-card {
            display: flex;
            gap: 20px;
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-xs);
        }

        .article-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-border-strong);
            transform: translateY(-2px);
        }

        .article-card-thumb {
            width: 220px;
            min-height: 180px;
            flex-shrink: 0;
            position: relative;
            overflow: hidden;
            background: var(--color-bg);
        }

        .article-card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .article-card:hover .article-card-thumb img {
            transform: scale(1.06);
        }

        .article-card-body {
            padding: 20px 20px 20px 4px;
            display: flex;
            flex-direction: column;
            flex: 1;
            min-width: 0;
        }

        .article-card-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }

        .article-card-tag {
            font-size: 0.78rem;
            padding: 4px 10px;
            border-radius: var(--radius-xl);
            font-weight: 500;
            background: var(--color-primary-bg);
            color: var(--color-primary);
        }

        .article-card-tag.accent {
            background: var(--color-accent-bg);
            color: var(--color-accent);
        }

        .article-card h3 {
            font-size: 1.12rem;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.4;
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .article-card h3 a {
            color: inherit;
            transition: color var(--transition-fast);
        }

        .article-card h3 a:hover {
            color: var(--color-primary);
        }

        .article-card-excerpt {
            font-size: 0.9rem;
            color: var(--color-text-light);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 14px;
            font-size: 0.82rem;
            color: var(--color-text-lighter);
        }

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

        /* Sidebar */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: calc(var(--header-height) + 24px);
        }

        .sidebar-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            padding: 22px;
            box-shadow: var(--shadow-xs);
        }

        .sidebar-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--color-border-light);
            letter-spacing: -0.01em;
        }

        .sidebar-popular-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .sidebar-popular-item {
            display: flex;
            gap: 10px;
            align-items: flex-start;
            padding: 10px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .sidebar-popular-item:hover {
            background: var(--color-bg);
        }

        .sidebar-popular-item .rank {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--color-primary-lighter);
            flex-shrink: 0;
            line-height: 1;
            min-width: 26px;
            text-align: center;
        }

        .sidebar-popular-item .rank.top {
            color: var(--color-accent);
        }

        .sidebar-popular-item .info {
            flex: 1;
            min-width: 0;
        }

        .sidebar-popular-item .info a {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text);
            line-height: 1.4;
            display: block;
            transition: color var(--transition-fast);
        }

        .sidebar-popular-item .info a:hover {
            color: var(--color-primary);
        }

        .sidebar-popular-item .info .meta {
            font-size: 0.78rem;
            color: var(--color-text-lighter);
            margin-top: 3px;
        }

        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .sidebar-tag {
            font-size: 0.82rem;
            padding: 6px 12px;
            border-radius: var(--radius-xl);
            background: var(--color-bg);
            color: var(--color-text-secondary);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .sidebar-tag:hover {
            background: var(--color-primary-bg);
            color: var(--color-primary);
            border-color: var(--color-primary-lighter);
        }

        .sidebar-cta-card {
            background: linear-gradient(145deg, var(--color-primary-dark), var(--color-primary));
            color: #fff;
            border-radius: var(--radius-lg);
            padding: 24px 22px;
            text-align: center;
            box-shadow: var(--shadow-md);
        }

        .sidebar-cta-card h4 {
            color: #fff;
            border-bottom-color: rgba(255, 255, 255, 0.2);
            font-size: 1.05rem;
        }

        .sidebar-cta-card p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .sidebar-cta-card .btn-sidebar-cta {
            display: inline-block;
            padding: 10px 24px;
            border-radius: var(--radius-xl);
            background: #fff;
            color: var(--color-primary);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-base);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }

        .sidebar-cta-card .btn-sidebar-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
        }

        /* Pagination */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            margin-top: 40px;
        }

        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            border: 1px solid var(--color-border);
            background: var(--color-bg-white);
            color: var(--color-text-secondary);
        }

        .pagination a:hover {
            background: var(--color-primary-bg);
            color: var(--color-primary);
            border-color: var(--color-primary-lighter);
        }

        .pagination .current {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            font-weight: 600;
            box-shadow: var(--shadow-sm);
        }

        .pagination .dots {
            border: none;
            background: transparent;
            color: var(--color-text-lighter);
        }

        /* ========== FEATURED SERVICES ========== */
        .featured-services {
            padding: 60px 0;
            background: var(--color-bg-white);
            border-top: 1px solid var(--color-border-light);
            border-bottom: 1px solid var(--color-border-light);
        }

        .featured-services h2 {
            text-align: center;
            font-size: 1.65rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .featured-services .section-subtitle {
            text-align: center;
            font-size: 0.95rem;
            color: var(--color-text-light);
            margin-bottom: 36px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

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

        .service-card {
            background: var(--color-bg);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            text-align: center;
            box-shadow: var(--shadow-xs);
        }

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

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

        .service-card-icon.green {
            background: var(--color-accent-bg);
            color: var(--color-accent);
        }

        .service-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
        }

        .service-card p {
            font-size: 0.88rem;
            color: var(--color-text-light);
            line-height: 1.6;
        }

        /* ========== PROCESS STEPS ========== */
        .process-section {
            padding: 60px 0;
            background: var(--color-bg);
        }

        .process-section h2 {
            text-align: center;
            font-size: 1.65rem;
            font-weight: 700;
            margin-bottom: 36px;
            letter-spacing: -0.01em;
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }

        .process-step {
            text-align: center;
            position: relative;
            padding: 24px 16px;
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition-base);
        }

        .process-step:hover {
            box-shadow: var(--shadow-md);
        }

        .process-step::before {
            counter-increment: step;
            content: counter(step);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            margin: 0 auto 14px;
        }

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

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

        /* ========== FAQ ========== */
        .faq-section {
            padding: 60px 0;
            background: var(--color-bg-white);
        }

        .faq-section h2 {
            text-align: center;
            font-size: 1.65rem;
            font-weight: 700;
            margin-bottom: 36px;
            letter-spacing: -0.01em;
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

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

        .faq-question {
            width: 100%;
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            gap: 16px;
            transition: color var(--transition-fast);
        }

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

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--color-border-light);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-base);
            font-size: 0.8rem;
            color: var(--color-text-light);
        }

        .faq-item.open .faq-icon {
            background: var(--color-primary);
            color: #fff;
            transform: rotate(45deg);
        }

        .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 22px 18px;
            font-size: 0.92rem;
            color: var(--color-text-light);
            line-height: 1.7;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 60px 0;
            background: linear-gradient(160deg, #0f1d3d 0%, #15254d 50%, #0f1d3d 100%);
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }

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

        .cta-section h2 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .cta-section p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.6;
        }

        .btn-cta-large {
            display: inline-block;
            padding: 14px 36px;
            border-radius: var(--radius-xl);
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-primary);
            background: #fff;
            transition: all var(--transition-base);
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.2);
            letter-spacing: -0.01em;
        }

        .btn-cta-large:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
        }

        .btn-cta-large:active {
            transform: translateY(0);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--color-bg-dark);
            color: var(--color-text-white);
            padding: 50px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: #fff;
        }

        .footer-brand p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.6;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 14px;
            color: #fff;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 9px;
        }

        .footer-col ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 0.84rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .category-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .sidebar-cta-card {
                grid-column: 1 / -1;
            }

            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }

            .header-search {
                min-width: 140px;
            }

            .header-nav a {
                padding: 8px 12px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
            }

            .header-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                flex-direction: column;
                background: #fff;
                border-bottom: 1px solid var(--color-border);
                padding: 12px 20px;
                gap: 4px;
                box-shadow: var(--shadow-lg);
            }

            .header-nav.mobile-open {
                display: flex;
            }

            .header-nav a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 0.95rem;
            }

            .header-nav a.active::after {
                display: none;
            }

            .header-search {
                display: none;
            }

            .mobile-menu-toggle {
                display: flex;
            }

            .btn-header-login {
                font-size: 0.82rem;
                padding: 7px 14px;
            }

            .btn-header-cta {
                font-size: 0.82rem;
                padding: 7px 16px;
            }

            .category-hero {
                padding: 40px 0 50px;
            }

            .category-hero h1 {
                font-size: 1.8rem;
            }

            .category-hero-desc {
                font-size: 0.95rem;
            }

            .category-hero-stats {
                gap: 18px;
            }

            .category-hero-stat .stat-number {
                font-size: 1.5rem;
            }

            .article-card {
                flex-direction: column;
            }

            .article-card-thumb {
                width: 100%;
                min-height: 180px;
                max-height: 220px;
            }

            .article-card-body {
                padding: 16px;
            }

            .services-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .process-steps {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .process-step {
                padding: 18px 12px;
            }

            .sidebar {
                grid-template-columns: 1fr;
            }

            .faq-question {
                font-size: 0.92rem;
                padding: 15px 16px;
            }

            .faq-answer-inner {
                padding: 0 16px 14px;
            }

            .cta-section h2 {
                font-size: 1.4rem;
            }

            .cta-section p {
                font-size: 0.9rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .category-hero-stats {
                flex-direction: column;
                gap: 10px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .header-inner {
                padding: 0 16px;
            }

            .header-logo {
                font-size: 1.05rem;
            }

            .header-logo .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 0.7rem;
            }

            .btn-header-login {
                display: none;
            }

            .btn-header-cta {
                font-size: 0.8rem;
                padding: 7px 14px;
            }

            .category-hero {
                padding: 30px 0 40px;
            }

            .category-hero h1 {
                font-size: 1.5rem;
            }

            .category-hero-desc {
                font-size: 0.88rem;
            }

            .category-hero-stats {
                gap: 8px;
            }

            .category-hero-stat .stat-number {
                font-size: 1.3rem;
            }

            .category-hero-stat .stat-label {
                font-size: 0.78rem;
            }

            .article-card-thumb {
                min-height: 160px;
                max-height: 180px;
            }

            .article-card h3 {
                font-size: 1rem;
            }

            .article-card-excerpt {
                font-size: 0.84rem;
            }

            .article-sort button {
                padding: 5px 10px;
                font-size: 0.78rem;
            }

            .process-steps {
                grid-template-columns: 1fr;
                gap: 10px;
            }

            .pagination a,
            .pagination span {
                min-width: 34px;
                height: 34px;
                font-size: 0.82rem;
            }

            .featured-services h2,
            .process-section h2,
            .faq-section h2 {
                font-size: 1.35rem;
            }

            .category-main {
                padding: 30px 0 50px;
            }
        }