/* roulang page: index */
:root {
            --primary: #1a2740;
            --primary-light: #243656;
            --accent: #d4a853;
            --accent-light: #e8c97a;
            --accent-dark: #b8923d;
            --surface: #ffffff;
            --surface-alt: #f7f8fb;
            --text-main: #1a1a2e;
            --text-soft: #5a6170;
            --text-muted: #8b919e;
            --border: #e8ecf2;
            --border-light: #f0f2f6;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-card: 0 2px 16px rgba(26, 39, 64, 0.06);
            --shadow-card-hover: 0 8px 32px rgba(26, 39, 64, 0.12);
            --shadow-nav: 0 1px 0 rgba(0, 0, 0, 0.04);
            --shadow-soft: 0 4px 24px rgba(26, 39, 64, 0.08);
            --shadow-accent: 0 4px 20px rgba(212, 168, 83, 0.25);
            --transition-fast: 0.15s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.8, 0.25, 1.2);
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background-color: var(--surface-alt);
            overflow-x: hidden;
        }

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

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

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

        input,
        textarea {
            font-family: inherit;
            outline: none;
        }

        /* Container */
        .container-custom {
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-nav);
            transition: all var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 20px rgba(26, 39, 64, 0.08);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            letter-spacing: -0.01em;
            color: var(--primary);
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }

        .nav-logo:hover {
            opacity: 0.82;
        }

        .nav-logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 1rem;
            box-shadow: var(--shadow-accent);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--text-soft);
            letter-spacing: 0.01em;
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .nav-links li a:hover {
            color: var(--primary);
            background: rgba(26, 39, 64, 0.04);
        }

        .nav-links li a.active {
            color: var(--accent-dark);
            font-weight: 600;
            background: rgba(212, 168, 83, 0.08);
        }

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

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: 10px;
            font-size: 0.9rem;
            font-weight: 600;
            background: var(--accent);
            color: #fff !important;
            transition: all var(--transition);
            box-shadow: var(--shadow-accent);
            white-space: nowrap;
        }

        .nav-cta-btn:hover {
            background: var(--accent-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 24px rgba(212, 168, 83, 0.35);
        }

        /* Mobile nav toggle */
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            padding: 6px;
            cursor: pointer;
            border-radius: 8px;
            transition: background var(--transition-fast);
        }

        .nav-toggle:hover {
            background: rgba(26, 39, 64, 0.06);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            bottom: 0;
            background: #fff;
            z-index: 99;
            flex-direction: column;
            padding: 20px 24px;
            gap: 8px;
            overflow-y: auto;
        }

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

        .mobile-menu a {
            display: block;
            padding: 14px 18px;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-soft);
            transition: all var(--transition-fast);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: rgba(26, 39, 64, 0.05);
            color: var(--primary);
        }

        .mobile-menu a.active {
            font-weight: 600;
            color: var(--accent-dark);
            background: rgba(212, 168, 83, 0.08);
        }

        /* Hero Section */
        .hero-section {
            position: relative;
            min-height: 580px;
            display: flex;
            align-items: center;
            background: linear-gradient(160deg, #1a2740 0%, #243656 40%, #1e3555 100%);
            overflow: hidden;
            isolation: isolate;
        }

        .hero-bg-img {
            position: absolute;
            inset: 0;
            z-index: 0;
            opacity: 0.18;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            mix-blend-mode: overlay;
        }

        .hero-glow {
            position: absolute;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(212, 168, 83, 0.2) 0%, transparent 70%);
            top: -150px;
            right: -100px;
            z-index: 0;
            pointer-events: none;
        }

        .hero-glow-2 {
            position: absolute;
            width: 350px;
            height: 350px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(232, 201, 122, 0.12) 0%, transparent 70%);
            bottom: -100px;
            left: -80px;
            z-index: 0;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            width: 100%;
        }

        .hero-text {
            color: #ffffff;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            background: rgba(212, 168, 83, 0.2);
            border: 1px solid rgba(212, 168, 83, 0.35);
            color: #e8c97a;
            margin-bottom: 20px;
        }

        .hero-badge .dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: #2ecc71;
            animation: pulse-dot 1.8s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                box-shadow: 0 0 6px #2ecc71;
            }
            50% {
                opacity: 0.4;
                box-shadow: 0 0 2px #2ecc71;
            }
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin: 0 0 16px;
            color: #ffffff;
        }

        .hero-title .accent {
            color: #e8c97a;
            position: relative;
        }

        .hero-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.7;
            margin: 0 0 32px;
            max-width: 480px;
        }

        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .btn-hero-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 12px;
            font-size: 1rem;
            font-weight: 600;
            background: var(--accent);
            color: #1a2740;
            transition: all var(--transition);
            box-shadow: var(--shadow-accent);
        }

        .btn-hero-primary:hover {
            background: #e8c97a;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(212, 168, 83, 0.4);
        }

        .btn-hero-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 12px;
            font-size: 1rem;
            font-weight: 500;
            background: transparent;
            color: #ffffff;
            border: 1.5px solid rgba(255, 255, 255, 0.35);
            transition: all var(--transition);
        }

        .btn-hero-outline:hover {
            border-color: #ffffff;
            background: rgba(255, 255, 255, 0.06);
            transform: translateY(-2px);
        }

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

        .hero-dashboard {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 20px;
            padding: 24px;
            backdrop-filter: blur(6px);
            width: 100%;
            max-width: 440px;
        }

        .hero-stats-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin-bottom: 16px;
        }

        .hero-stat-mini {
            background: rgba(255, 255, 255, 0.07);
            border-radius: 12px;
            padding: 14px 10px;
            text-align: center;
            color: #fff;
        }

        .hero-stat-mini .val {
            font-size: 1.5rem;
            font-weight: 700;
            color: #e8c97a;
        }

        .hero-stat-mini .lbl {
            font-size: 0.7rem;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 2px;
        }

        .hero-chart-placeholder {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 12px;
            height: 120px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.35);
            font-size: 0.85rem;
            letter-spacing: 0.03em;
            border: 1px dashed rgba(255, 255, 255, 0.15);
        }

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

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            color: var(--accent-dark);
            margin-bottom: 8px;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--primary);
            margin: 0 0 12px;
            line-height: 1.25;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-soft);
            margin: 0 0 40px;
            max-width: 560px;
            line-height: 1.6;
        }

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

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

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

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

        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

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

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

        .stat-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 1.3rem;
            background: rgba(212, 168, 83, 0.1);
            color: var(--accent-dark);
        }

        .stat-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            line-height: 1;
            margin-bottom: 4px;
        }

        .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
        }

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

        .category-card {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            min-height: 260px;
            display: flex;
            align-items: flex-end;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: var(--shadow-card);
            isolation: isolate;
        }

        .category-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-card-hover);
        }

        .category-card-img {
            position: absolute;
            inset: 0;
            z-index: 0;
        }

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

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

        .category-card-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(0deg, rgba(26, 39, 64, 0.85) 0%, rgba(26, 39, 64, 0.2) 55%, rgba(26, 39, 64, 0.05) 100%);
        }

        .category-card-body {
            position: relative;
            z-index: 2;
            padding: 28px;
            color: #ffffff;
            width: 100%;
        }

        .category-card-body h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin: 0 0 6px;
            letter-spacing: -0.01em;
        }

        .category-card-body p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.78);
            margin: 0 0 14px;
            line-height: 1.5;
        }

        .category-card-arrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: #e8c97a;
            transition: gap var(--transition-fast);
        }

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

        /* Feature Matrix */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

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

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

        .feature-card-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin-bottom: 16px;
            background: rgba(26, 39, 64, 0.06);
            color: var(--primary);
            transition: all var(--transition);
        }

        .feature-card:hover .feature-card-icon {
            background: var(--accent);
            color: #fff;
            box-shadow: var(--shadow-accent);
        }

        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--primary);
            margin: 0 0 8px;
            letter-spacing: -0.01em;
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-soft);
            margin: 0;
            line-height: 1.6;
        }

        .feature-card .tag-row {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 14px;
        }

        .feature-tag {
            display: inline-block;
            padding: 4px 10px;
            border-radius: 6px;
            font-size: 0.72rem;
            font-weight: 500;
            background: rgba(26, 39, 64, 0.05);
            color: var(--text-soft);
            letter-spacing: 0.02em;
        }

        /* Latest Posts Section */
        .posts-section {
            background: var(--surface);
        }

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

        .post-card {
            display: flex;
            gap: 18px;
            background: var(--surface-alt);
            border-radius: var(--radius-lg);
            padding: 18px;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            cursor: pointer;
        }

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

        .post-card-thumb {
            flex-shrink: 0;
            width: 120px;
            height: 90px;
            border-radius: 10px;
            overflow: hidden;
        }

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

        .post-card:hover .post-card-thumb img {
            transform: scale(1.08);
        }

        .post-card-info {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
            min-width: 0;
        }

        .post-card-cat {
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--accent-dark);
            letter-spacing: 0.03em;
            text-transform: uppercase;
            margin-bottom: 4px;
        }

        .post-card-info h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--primary);
            margin: 0 0 4px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .post-card-info .post-excerpt {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin: 0 0 6px;
        }

        .post-card-meta {
            font-size: 0.72rem;
            color: var(--text-muted);
        }

        .posts-empty {
            text-align: center;
            padding: 40px;
            color: var(--text-muted);
            font-size: 0.95rem;
            background: var(--surface-alt);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--border);
        }

        /* Process / Steps */
        .steps-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-card {
            text-align: center;
            position: relative;
            padding: 28px 18px;
        }

        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 700;
            margin: 0 auto 16px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            box-shadow: var(--shadow-accent);
            position: relative;
            z-index: 2;
        }

        .step-card h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--primary);
            margin: 0 0 6px;
        }

        .step-card p {
            font-size: 0.85rem;
            color: var(--text-soft);
            margin: 0;
            line-height: 1.5;
        }

        .step-connector {
            display: none;
        }

        @media (min-width: 769px) {
            .steps-container::after {
                content: '';
                position: absolute;
                top: 44px;
                left: 15%;
                right: 15%;
                height: 2px;
                background: linear-gradient(90deg, transparent, var(--border), transparent);
                z-index: 1;
                border-radius: 2px;
            }
        }

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

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

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            background: none;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--primary);
            cursor: pointer;
            transition: color var(--transition-fast);
            text-align: left;
            gap: 12px;
        }

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

        .faq-question i {
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition);
            padding: 0 22px;
            font-size: 0.88rem;
            color: var(--text-soft);
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 200px;
            padding: 0 22px 18px;
        }

        .faq-item.open {
            border-color: rgba(212, 168, 83, 0.3);
            box-shadow: var(--shadow-soft);
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(160deg, #1a2740 0%, #243656 100%);
            color: #ffffff;
            text-align: center;
            position: relative;
            overflow: hidden;
            isolation: isolate;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            z-index: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.1;
            mix-blend-mode: overlay;
        }

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

        .cta-section .section-title {
            color: #ffffff;
        }

        .cta-section .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
            margin-left: auto;
            margin-right: auto;
        }

        .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 16px 36px;
            border-radius: 14px;
            font-size: 1.05rem;
            font-weight: 600;
            background: var(--accent);
            color: #1a2740;
            transition: all var(--transition);
            box-shadow: var(--shadow-accent);
            margin-top: 8px;
        }

        .btn-cta-large:hover {
            background: #e8c97a;
            transform: translateY(-3px);
            box-shadow: 0 10px 32px rgba(212, 168, 83, 0.45);
        }

        /* Footer */
        .site-footer {
            background: #141c2b;
            color: rgba(255, 255, 255, 0.7);
            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: #ffffff;
            margin: 0 0 10px;
            letter-spacing: -0.01em;
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.6;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 600;
            color: #ffffff;
            margin: 0 0 14px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: #e8c97a;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-content {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-visual {
                order: -1;
            }
            .hero-dashboard {
                max-width: 100%;
            }
            .hero-title {
                font-size: 2.4rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .posts-grid {
                grid-template-columns: 1fr;
            }
            .steps-container {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-cta-btn {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .hero-section {
                min-height: auto;
                padding: 60px 0 40px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .hero-dashboard {
                padding: 16px;
            }
            .hero-stats-row {
                gap: 8px;
            }
            .hero-stat-mini {
                padding: 10px 6px;
            }
            .hero-stat-mini .val {
                font-size: 1.2rem;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-subtitle {
                font-size: 0.9rem;
                margin-bottom: 28px;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-card {
                padding: 20px 14px;
            }
            .stat-value {
                font-size: 1.5rem;
            }
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .posts-grid {
                grid-template-columns: 1fr;
            }
            .post-card {
                flex-direction: column;
                gap: 12px;
            }
            .post-card-thumb {
                width: 100%;
                height: 160px;
            }
            .steps-container {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .steps-container::after {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-buttons {
                flex-direction: column;
            }
            .btn-hero-primary,
            .btn-hero-outline {
                width: 100%;
                justify-content: center;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-card {
                padding: 16px 10px;
            }
            .stat-value {
                font-size: 1.3rem;
            }
            .stat-icon {
                width: 36px;
                height: 36px;
                font-size: 1rem;
                border-radius: 8px;
            }
            .steps-container {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .step-number {
                width: 40px;
                height: 40px;
                font-size: 1.1rem;
            }
            .category-card {
                min-height: 200px;
            }
            .faq-question {
                font-size: 0.85rem;
                padding: 14px 16px;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 0.8rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 14px;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .nav-inner {
                height: 56px;
            }
            .nav-logo {
                font-size: 1.1rem;
            }
            .nav-logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.85rem;
                border-radius: 8px;
            }
            .mobile-menu {
                top: 56px;
            }
        }

        /* Focus accessibility */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* Extra animation */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-fade-in {
            animation: fadeInUp 0.6s ease forwards;
        }

        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }

/* roulang page: article */
:root {
            --color-primary: #0f1b35;
            --color-primary-light: #1a2d50;
            --color-accent: #d4a853;
            --color-accent-light: #e8c97a;
            --color-accent-dark: #b8913a;
            --color-bg: #ffffff;
            --color-bg-alt: #f7f8fa;
            --color-bg-warm: #faf8f5;
            --color-text: #1a1a1a;
            --color-text-secondary: #5a5a5a;
            --color-text-muted: #888888;
            --color-border: #e8e8ea;
            --color-border-light: #f0f0f2;
            --color-red: #c0392b;
            --color-red-light: #e74c3c;
            --color-green: #27ae60;
            --color-blue: #2980b9;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06), 0 2px 6px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.10), 0 8px 20px rgba(0, 0, 0, 0.05);
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.4s ease;
            --font-sans: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
            --max-width: 1200px;
            --max-width-narrow: 780px;
            --nav-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;
            text-rendering: optimizeLegibility;
        }

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

        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;
            background: none;
        }

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

        ul,
        ol {
            list-style: none;
        }

        .container-custom {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
        }

        .container-narrow {
            width: 100%;
            max-width: var(--max-width-narrow);
            margin: 0 auto;
            padding: 0 28px;
        }

        /* Header & Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border-light);
            height: var(--nav-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;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
        }

        .brand-logo {
            font-size: 1.3rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--color-primary);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .brand-logo .logo-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--color-accent);
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 36px;
        }

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            position: relative;
            padding: 4px 0;
            letter-spacing: 0.01em;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-accent);
            border-radius: 1px;
            transition: width var(--transition-base);
        }

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

        .nav-links a:hover::after {
            width: 100%;
        }

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

        .nav-links a.active::after {
            width: 100%;
            background: var(--color-accent);
        }

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

        .hamburger-btn span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 1px;
            transition: all var(--transition-base);
            transform-origin: center;
        }

        .hamburger-btn.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger-btn.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }

        .hamburger-btn.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 28px;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-base);
        }

        .mobile-nav-overlay.active {
            display: flex;
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-nav-overlay a {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--color-text);
            letter-spacing: 0.02em;
            transition: color var(--transition-fast);
        }

        .mobile-nav-overlay a:hover {
            color: var(--color-accent-dark);
        }

        /* Breadcrumb */
        .breadcrumb-section {
            background: var(--color-bg-alt);
            border-bottom: 1px solid var(--color-border-light);
            padding: 16px 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            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-accent-dark);
        }

        .breadcrumb .separator {
            color: var(--color-border);
            font-size: 0.7rem;
        }

        .breadcrumb .current {
            color: var(--color-text);
            font-weight: 500;
            max-width: 320px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* Article Main */
        .article-main {
            flex: 1;
            padding: 40px 0 60px;
        }

        .article-header-block {
            text-align: center;
            margin-bottom: 36px;
        }

        .article-cover-wrapper {
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 32px;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 16 / 9;
            background: var(--color-bg-alt);
            position: relative;
        }

        .article-cover-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        .article-category-badge {
            display: inline-block;
            background: var(--color-accent);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 20px;
            letter-spacing: 0.03em;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .article-title {
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-primary);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            font-size: 0.9rem;
            color: var(--color-text-muted);
            flex-wrap: wrap;
        }

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

        .article-meta i {
            font-size: 0.85rem;
            color: var(--color-accent);
        }

        .article-divider {
            width: 60px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 2px;
            margin: 28px auto 0;
            opacity: 0.6;
        }

        /* Article Content */
        .article-content-wrapper {
            background: var(--color-bg);
            border-radius: var(--radius-lg);
            padding: 40px 48px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
        }

        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--color-text);
        }

        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-primary);
            margin: 36px 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--color-border-light);
            letter-spacing: 0.01em;
        }

        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--color-primary-light);
            margin: 28px 0 12px;
        }

        .article-content h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--color-text);
            margin: 22px 0 10px;
        }

        .article-content p {
            margin-bottom: 16px;
        }

        .article-content ul,
        .article-content ol {
            margin: 12px 0 20px 20px;
        }

        .article-content ul {
            list-style: disc;
        }

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

        .article-content li {
            margin-bottom: 8px;
            padding-left: 4px;
        }

        .article-content blockquote {
            border-left: 4px solid var(--color-accent);
            background: var(--color-bg-warm);
            padding: 18px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--color-text-secondary);
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: 24px auto;
            box-shadow: var(--shadow-md);
        }

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

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

        .article-content code {
            background: var(--color-bg-alt);
            padding: 2px 8px;
            border-radius: 4px;
            font-family: var(--font-mono);
            font-size: 0.9em;
            color: var(--color-red);
        }

        .article-content pre {
            background: var(--color-primary);
            color: #e8e8ea;
            padding: 20px 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 20px 0;
            font-family: var(--font-mono);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .article-content pre code {
            background: none;
            color: inherit;
            padding: 0;
            font-size: inherit;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 0.95rem;
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--color-border);
            padding: 10px 14px;
            text-align: left;
        }

        .article-content th {
            background: var(--color-bg-alt);
            font-weight: 600;
            color: var(--color-primary);
        }

        /* Article Tags */
        .article-tags-section {
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--color-border-light);
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

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

        .tag-pill {
            display: inline-block;
            background: var(--color-bg-alt);
            color: var(--color-text-secondary);
            font-size: 0.8rem;
            padding: 5px 13px;
            border-radius: 16px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
            cursor: default;
        }

        .tag-pill:hover {
            background: var(--color-accent);
            color: #fff;
            border-color: var(--color-accent);
        }

        /* Not Found */
        .not-found-block {
            text-align: center;
            padding: 80px 28px;
        }

        .not-found-block .nf-icon {
            font-size: 3.5rem;
            color: var(--color-border);
            margin-bottom: 20px;
        }

        .not-found-block h2 {
            font-size: 1.6rem;
            color: var(--color-primary);
            margin-bottom: 12px;
        }

        .not-found-block p {
            color: var(--color-text-muted);
            margin-bottom: 24px;
        }

        .btn-back {
            display: inline-block;
            background: var(--color-primary);
            color: #fff;
            padding: 12px 28px;
            border-radius: 25px;
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition-base);
            letter-spacing: 0.02em;
        }

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

        /* Related Articles */
        .related-section {
            padding: 50px 0 60px;
            background: var(--color-bg-alt);
            border-top: 1px solid var(--color-border-light);
        }

        .section-label {
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--color-accent-dark);
            margin-bottom: 8px;
        }

        .section-title {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 32px;
            letter-spacing: -0.01em;
        }

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

        .related-card {
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

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

        .related-card-img {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--color-bg-alt);
        }

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

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

        .related-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .related-card-body .card-cat {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--color-accent-dark);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 6px;
        }

        .related-card-body h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

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

        .no-related {
            text-align: center;
            color: var(--color-text-muted);
            padding: 32px;
            font-size: 0.95rem;
        }

        /* CTA Section */
        .cta-section {
            padding: 56px 0;
            background: var(--color-primary);
            text-align: center;
        }

        .cta-section .cta-inner {
            max-width: 600px;
            margin: 0 auto;
            padding: 0 28px;
        }

        .cta-section h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.01em;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1rem;
            margin-bottom: 24px;
            line-height: 1.7;
        }

        .btn-cta {
            display: inline-block;
            background: var(--color-accent);
            color: #fff;
            padding: 14px 36px;
            border-radius: 28px;
            font-weight: 600;
            font-size: 1rem;
            letter-spacing: 0.02em;
            transition: all var(--transition-base);
            box-shadow: 0 4px 16px rgba(212, 168, 83, 0.35);
        }

        .btn-cta:hover {
            background: var(--color-accent-light);
            box-shadow: 0 8px 24px rgba(212, 168, 83, 0.5);
            transform: translateY(-2px);
        }

        /* Footer */
        .site-footer {
            background: #0a1225;
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 32px;
        }

        .footer-brand h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: 0.01em;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.6;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }

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

        .footer-col ul li a {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .article-title {
                font-size: 1.8rem;
            }
            .article-content-wrapper {
                padding: 28px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .mobile-nav-overlay {
                display: flex;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .article-title {
                font-size: 1.5rem;
            }
            .article-content-wrapper {
                padding: 20px 18px;
                border-radius: var(--radius-md);
            }
            .article-content {
                font-size: 1rem;
            }
            .article-content h2 {
                font-size: 1.3rem;
            }
            .article-content h3 {
                font-size: 1.1rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .container-custom,
            .container-narrow {
                padding: 0 18px;
            }
            .header-inner {
                padding: 0 18px;
            }
            .article-cover-wrapper {
                border-radius: var(--radius-md);
                margin-bottom: 20px;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
        }

        @media (max-width: 520px) {
            .article-title {
                font-size: 1.3rem;
            }
            .article-meta {
                gap: 12px;
                font-size: 0.8rem;
            }
            .article-content-wrapper {
                padding: 16px 14px;
            }
            .article-content {
                font-size: 0.95rem;
                line-height: 1.75;
            }
            .article-content blockquote {
                padding: 12px 16px;
            }
            .cta-section h3 {
                font-size: 1.3rem;
            }
            .btn-cta {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .related-card-body {
                padding: 14px 16px 16px;
            }
            .related-card-body h4 {
                font-size: 0.9rem;
            }
            .breadcrumb .current {
                max-width: 160px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --success: #10b981;
            --success-light: #d1fae5;
            --bg: #f8fafc;
            --bg-white: #ffffff;
            --bg-dark: #0f172a;
            --bg-dark-secondary: #1e293b;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-light: #94a3b8;
            --text-on-dark: #e2e8f0;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(0, 0, 0, 0.05);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --font-mono: 'JetBrains Mono', 'SF Mono', 'Consolas', 'Monaco', monospace;
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing: 16px;
            --spacing-md: 24px;
            --spacing-lg: 32px;
            --spacing-xl: 48px;
            --spacing-2xl: 64px;
            --spacing-3xl: 80px;
            --nav-height: 68px;
            --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

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

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

        ul,
        ol {
            list-style: none;
        }

        .container-custom {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        @media (max-width: 768px) {
            .container-custom {
                padding: 0 var(--spacing);
            }
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            height: var(--nav-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition);
        }

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

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.01em;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

        .logo-link:hover {
            color: var(--primary);
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), #3b82f6);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 0.85rem;
            letter-spacing: 0;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: var(--spacing-lg);
        }

        .nav-links li {
            list-style: none;
        }

        .nav-links a {
            position: relative;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: var(--spacing-xs) 2px;
            transition: color var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
            transition: width var(--transition);
        }

        .nav-links a:hover {
            color: var(--text);
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        .nav-links a.active,
        .nav-links a[aria-current="page"] {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-links a.active::after,
        .nav-links a[aria-current="page"]::after {
            width: 100%;
        }

        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: var(--spacing-sm);
            cursor: pointer;
            z-index: 1100;
            background: none;
            border: none;
        }

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

        .mobile-menu-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

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

        .mobile-menu-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.5);
            z-index: 1050;
            opacity: 0;
            transition: opacity var(--transition);
        }

        .mobile-menu-overlay.active {
            opacity: 1;
        }

        @media (max-width: 768px) {
            .mobile-menu-toggle {
                display: flex;
            }

            .mobile-menu-overlay {
                display: block;
                pointer-events: none;
            }

            .mobile-menu-overlay.active {
                pointer-events: auto;
            }

            .nav-links {
                position: fixed;
                top: 0;
                right: -320px;
                width: 280px;
                height: 100vh;
                background: var(--bg-white);
                flex-direction: column;
                align-items: flex-start;
                gap: var(--spacing);
                padding: 100px var(--spacing-md) var(--spacing-lg);
                box-shadow: var(--shadow-xl);
                transition: right var(--transition-slow);
                z-index: 1080;
            }

            .nav-links.mobile-open {
                right: 0;
            }

            .nav-links a {
                font-size: 1.05rem;
                padding: var(--spacing-sm) 0;
                width: 100%;
            }

            .nav-links a::after {
                bottom: -4px;
            }
        }

        @media (max-width: 520px) {
            .nav-links {
                width: 260px;
                right: -280px;
            }

            .logo-link {
                font-size: 1.15rem;
            }

            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.7rem;
            }
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
            font-size: 0.85rem;
            color: var(--text-secondary);
            flex-wrap: wrap;
        }

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

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

        .breadcrumb .separator {
            color: var(--text-light);
            font-size: 0.7rem;
        }

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

        /* ========== BANNER ========== */
        .category-banner {
            position: relative;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: var(--spacing-3xl) 0;
            color: #fff;
            overflow: hidden;
        }

        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(30, 58, 138, 0.7) 50%, rgba(15, 23, 42, 0.8) 100%);
            z-index: 1;
        }

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

        .banner-content {
            max-width: 680px;
        }

        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            letter-spacing: 0.02em;
            margin-bottom: var(--spacing-md);
        }

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

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.6);
            }
            50% {
                opacity: 0.6;
                box-shadow: 0 0 0 8px rgba(245, 158, 11, 0);
            }
        }

        .banner-content h1 {
            font-size: 2.5rem;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: var(--spacing);
            letter-spacing: -0.02em;
        }

        .banner-content .banner-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.7;
            margin-bottom: var(--spacing-md);
        }

        .banner-stats-row {
            display: flex;
            gap: var(--spacing-lg);
            flex-wrap: wrap;
        }

        .banner-stat-item {
            display: flex;
            align-items: baseline;
            gap: 6px;
        }

        .banner-stat-value {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--accent);
            font-family: var(--font-mono);
            letter-spacing: -0.01em;
        }

        .banner-stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
        }

        @media (max-width: 768px) {
            .category-banner {
                padding: var(--spacing-2xl) 0;
            }
            .banner-content h1 {
                font-size: 1.8rem;
            }
            .banner-content .banner-desc {
                font-size: 0.95rem;
            }
            .banner-stat-value {
                font-size: 1.4rem;
            }
        }

        @media (max-width: 520px) {
            .category-banner {
                padding: var(--spacing-xl) 0;
            }
            .banner-content h1 {
                font-size: 1.5rem;
            }
            .banner-stats-row {
                gap: var(--spacing);
            }
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: var(--spacing-3xl) 0;
        }

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

        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-xl);
        }

        .section-header h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.01em;
        }

        .section-header .section-subtitle {
            font-size: 0.95rem;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .section-label {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: var(--spacing);
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--spacing-2xl) 0;
            }
            .section-header h2 {
                font-size: 1.45rem;
            }
        }

        @media (max-width: 520px) {
            .section {
                padding: var(--spacing-xl) 0;
            }
            .section-header h2 {
                font-size: 1.3rem;
            }
        }

        /* ========== CARDS GRID ========== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: var(--spacing-md);
        }

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

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

        .card-article-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            background: var(--bg);
        }

        .card-article-body {
            padding: var(--spacing-md);
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .card-article-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 3px 10px;
            border-radius: 14px;
            margin-bottom: var(--spacing-sm);
            width: fit-content;
            letter-spacing: 0.02em;
        }

        .card-article-tag.hot {
            color: #dc2626;
            background: #fef2f2;
        }

        .card-article-tag.new {
            color: var(--success);
            background: var(--success-light);
        }

        .card-article-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: var(--spacing-sm);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-article-excerpt {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: var(--spacing);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-article-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.78rem;
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
            padding-top: var(--spacing);
        }

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

        @media (max-width: 768px) {
            .cards-grid {
                grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
                gap: var(--spacing);
            }
            .card-article-body {
                padding: var(--spacing);
            }
        }

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

        /* ========== DATA PANEL ========== */
        .data-panel {
            background: var(--bg-white);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            overflow: hidden;
        }

        .data-panel-header {
            background: var(--bg-dark-secondary);
            color: #fff;
            padding: var(--spacing-md) var(--spacing-lg);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--spacing);
        }

        .data-panel-header h3 {
            font-size: 1.05rem;
            font-weight: 600;
            letter-spacing: -0.01em;
        }

        .data-panel-badge {
            font-size: 0.75rem;
            background: rgba(255, 255, 255, 0.15);
            padding: 4px 10px;
            border-radius: 12px;
            color: rgba(255, 255, 255, 0.9);
        }

        .data-table-wrap {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }

        .data-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
            min-width: 700px;
        }

        .data-table thead th {
            background: #f8fafc;
            padding: 14px var(--spacing);
            text-align: left;
            font-weight: 600;
            color: var(--text);
            font-size: 0.82rem;
            letter-spacing: 0.02em;
            border-bottom: 2px solid var(--border);
            white-space: nowrap;
        }

        .data-table tbody td {
            padding: 12px var(--spacing);
            border-bottom: 1px solid var(--border-light);
            color: var(--text-secondary);
            white-space: nowrap;
        }

        .data-table tbody tr {
            transition: background var(--transition-fast);
        }

        .data-table tbody tr:hover {
            background: #fafbfc;
        }

        .data-table .num-cell {
            font-family: var(--font-mono);
            font-weight: 600;
            color: var(--text);
            letter-spacing: 0.02em;
        }

        .data-table .hot-badge {
            display: inline-block;
            background: #fef2f2;
            color: #dc2626;
            padding: 2px 8px;
            border-radius: 10px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        .data-table .cold-badge {
            display: inline-block;
            background: #eff6ff;
            color: #2563eb;
            padding: 2px 8px;
            border-radius: 10px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        /* ========== FEATURE MATRIX ========== */
        .feature-matrix {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            text-align: center;
        }

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

        .feature-card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--spacing);
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), #3b82f6);
        }

        .feature-card-icon.green {
            background: linear-gradient(135deg, #059669, #10b981);
        }

        .feature-card-icon.amber {
            background: linear-gradient(135deg, #d97706, #f59e0b);
        }

        .feature-card h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: var(--spacing-xs);
        }

        .feature-card p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .feature-matrix {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing);
            }
            .feature-card {
                padding: var(--spacing-md);
            }
        }

        @media (max-width: 520px) {
            .feature-matrix {
                grid-template-columns: 1fr;
            }
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }

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

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

        .faq-question {
            width: 100%;
            text-align: left;
            padding: var(--spacing-md);
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--text);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing);
            background: none;
            border: none;
            cursor: pointer;
            transition: color var(--transition-fast);
            letter-spacing: 0.01em;
        }

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

        .faq-arrow {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            color: var(--text-secondary);
            transition: all var(--transition);
        }

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

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

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 var(--spacing-md) var(--spacing-md);
        }

        .faq-answer p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1e3a5f 100%);
            color: #fff;
            text-align: center;
            padding: var(--spacing-3xl) 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.25) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.2) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .cta-section h2 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.01em;
        }

        .cta-section p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: var(--spacing-lg);
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: 50px;
            transition: all var(--transition);
            letter-spacing: 0.01em;
            white-space: nowrap;
            text-decoration: none;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
            transform: translateY(-1px);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.4);
        }

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

        .btn-lg {
            padding: 15px 36px;
            font-size: 1rem;
            border-radius: 50px;
        }

        @media (max-width: 520px) {
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .btn-lg {
                padding: 13px 28px;
                font-size: 0.9rem;
            }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-on-dark);
            padding: var(--spacing-2xl) 0 var(--spacing-lg);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            margin-bottom: var(--spacing-xl);
        }

        .footer-brand h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: var(--spacing-sm);
            color: #fff;
            letter-spacing: -0.01em;
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: var(--spacing);
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }

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

        .footer-col a {
            font-size: 0.85rem;
            color: var(--text-light);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: var(--spacing-md);
            text-align: center;
            font-size: 0.8rem;
            color: var(--text-light);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-lg);
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .footer-brand p {
                max-width: 100%;
            }
        }

        /* ========== UTILITIES ========== */
        .text-center {
            text-align: center;
        }
        .mt-lg {
            margin-top: var(--spacing-lg);
        }
        .mb-lg {
            margin-bottom: var(--spacing-lg);
        }

        /* ========== SKELETON / LOADING ========== */
        @keyframes shimmer {
            0% {
                background-position: -200px 0;
            }
            100% {
                background-position: 200px 0;
            }
        }

        /* ========== FOCUS ========== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 2px;
        }

        .skip-link {
            position: absolute;
            top: -100px;
            left: 0;
            background: var(--primary);
            color: #fff;
            padding: 8px 16px;
            z-index: 9999;
            border-radius: 0 0 var(--radius-sm) var(--radius-sm);
            transition: top var(--transition-fast);
        }

        .skip-link:focus {
            top: 0;
        }