/* roulang page: index */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --secondary: #f59e0b;
            --secondary-dark: #d97706;
            --secondary-light: #fbbf24;
            --accent: #8b5cf6;
            --bg-dark: #0f172a;
            --bg-section: #f8fafc;
            --bg-card: #ffffff;
            --text-primary: #1e293b;
            --text-secondary: #64748b;
            --text-light: #94a3b8;
            --border-light: #e2e8f0;
            --border-focus: #2563eb;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12), 0 4px 16px rgba(0,0,0,0.06);
            --shadow-xl: 0 24px 60px rgba(0,0,0,0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }

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

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

        body {
            font-family: var(--font-sans);
            color: var(--text-primary);
            background: #ffffff;
            line-height: 1.6;
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15, 23, 42, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            padding: 0 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1200px;
            padding: 0;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: -0.3px;
        }

        .site-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            font-weight: 800;
        }

        .site-logo .logo-badge {
            font-size: 11px;
            font-weight: 600;
            color: var(--secondary);
            background: rgba(245, 158, 11, 0.15);
            padding: 2px 10px;
            border-radius: 20px;
            border: 1px solid rgba(245, 158, 11, 0.2);
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-main a {
            padding: 8px 18px;
            color: rgba(255,255,255,0.75);
            font-size: 14px;
            font-weight: 500;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
            letter-spacing: 0.2px;
        }

        .nav-main a:hover {
            color: #ffffff;
            background: rgba(255,255,255,0.08);
        }

        .nav-main a.active {
            color: #ffffff;
            background: rgba(37, 99, 235, 0.3);
        }

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

        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark)) !important;
            color: #ffffff !important;
            padding: 8px 24px !important;
            border-radius: var(--radius-sm) !important;
            font-weight: 600 !important;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
        }

        .nav-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 24px rgba(37, 99, 235, 0.4) !important;
            background: linear-gradient(135deg, var(--primary-light), var(--primary)) !important;
        }

        .nav-cta i {
            margin-right: 6px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: none;
            cursor: pointer;
        }

        .nav-toggle span {
            width: 24px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition);
        }

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

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

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

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-dark);
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.3;
            transform: scale(1.05);
            animation: heroZoom 20s ease-in-out infinite alternate;
        }

        @keyframes heroZoom {
            0% { transform: scale(1.05); }
            100% { transform: scale(1.15); }
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.92) 0%, rgba(30,58,138,0.6) 50%, rgba(15,23,42,0.88) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 860px;
            padding: 40px 24px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(245, 158, 11, 0.12);
            border: 1px solid rgba(245, 158, 11, 0.25);
            padding: 6px 18px;
            border-radius: 50px;
            color: var(--secondary-light);
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 28px;
            letter-spacing: 0.5px;
        }

        .hero-badge i {
            font-size: 12px;
        }

        .hero h1 {
            font-size: clamp(36px, 7vw, 68px);
            font-weight: 800;
            color: #ffffff;
            line-height: 1.1;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }

        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--secondary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero p {
            font-size: clamp(16px, 2vw, 20px);
            color: rgba(255,255,255,0.7);
            line-height: 1.7;
            max-width: 640px;
            margin: 0 auto 32px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #ffffff;
            font-size: 16px;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-sm);
            box-shadow: 0 4px 20px rgba(37, 99, 235, 0.35);
            transition: var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(37, 99, 235, 0.45);
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            background: rgba(255,255,255,0.08);
            color: #ffffff;
            font-size: 16px;
            font-weight: 600;
            border: 1px solid rgba(255,255,255,0.15);
            border-radius: var(--radius-sm);
            backdrop-filter: blur(4px);
            transition: var(--transition);
        }

        .btn-secondary:hover {
            background: rgba(255,255,255,0.15);
            border-color: rgba(255,255,255,0.3);
            transform: translateY(-2px);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            justify-content: center;
            margin-top: 56px;
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.08);
        }

        .hero-stat {
            text-align: center;
        }

        .hero-stat .num {
            font-size: 32px;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.2;
        }

        .hero-stat .num span {
            color: var(--secondary-light);
        }

        .hero-stat .label {
            font-size: 13px;
            color: rgba(255,255,255,0.5);
            margin-top: 4px;
        }

        /* ===== Sections ===== */
        .section {
            padding: 90px 0;
        }

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

        .section-dark {
            background: var(--bg-dark);
            color: #ffffff;
        }

        .section-header {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 56px;
        }

        .section-header .tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(37, 99, 235, 0.08);
            padding: 4px 14px;
            border-radius: 20px;
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .section-header h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .section-dark .section-header h2 {
            color: #ffffff;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .section-dark .section-header p {
            color: rgba(255,255,255,0.6);
        }

        .section-dark .section-header .tag {
            background: rgba(59, 130, 246, 0.15);
            color: var(--primary-light);
        }

        /* ===== Feature Cards ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(37, 99, 235, 0.15);
        }

        .feature-card .icon-box {
            width: 64px;
            height: 64px;
            margin: 0 auto 18px;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(139, 92, 246, 0.08));
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--primary);
            transition: var(--transition);
        }

        .feature-card:hover .icon-box {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #ffffff;
            transform: scale(1.05);
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== Category Cards ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .category-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .category-card .card-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .category-card .card-img .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15,23,42,0.7), transparent);
        }

        .category-card .card-body {
            padding: 24px;
        }

        .category-card .card-body .cat-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(37, 99, 235, 0.08);
            padding: 3px 12px;
            border-radius: 20px;
            margin-bottom: 10px;
        }

        .category-card .card-body h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .category-card .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .category-card .card-body .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .category-card .card-body .card-link i {
            font-size: 12px;
            transition: var(--transition);
        }

        .category-card .card-body .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== Info List (CMS) ===== */
        .info-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
        }

        .info-card {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .info-card:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(37, 99, 235, 0.12);
            transform: translateX(4px);
        }

        .info-card .info-index {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(139, 92, 246, 0.08));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
        }

        .info-card .info-body {
            flex: 1;
            min-width: 0;
        }

        .info-card .info-body .info-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            margin-bottom: 6px;
        }

        .info-card .info-body .info-meta .cat {
            font-size: 11px;
            font-weight: 600;
            color: var(--secondary);
            background: rgba(245, 158, 11, 0.08);
            padding: 2px 10px;
            border-radius: 12px;
        }

        .info-card .info-body .info-meta .date {
            font-size: 12px;
            color: var(--text-light);
        }

        .info-card .info-body h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .info-card .info-body h3 a {
            color: var(--text-primary);
        }

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

        .info-card .info-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .info-empty {
            text-align: center;
            padding: 48px 24px;
            color: var(--text-light);
            font-size: 16px;
            background: var(--bg-card);
            border: 1px dashed var(--border-light);
            border-radius: var(--radius-md);
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .stat-card {
            text-align: center;
            padding: 32px 20px;
            background: rgba(255,255,255,0.04);
            border: 1px solid rgba(255,255,255,0.06);
            border-radius: var(--radius-md);
            transition: var(--transition);
        }

        .stat-card:hover {
            background: rgba(255,255,255,0.07);
            transform: translateY(-4px);
        }

        .stat-card .num {
            font-size: 40px;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-card .num span {
            color: var(--secondary-light);
        }

        .stat-card .label {
            font-size: 14px;
            color: rgba(255,255,255,0.55);
            font-weight: 400;
        }

        /* ===== Process / Flow ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .process-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(to right, var(--primary), var(--accent), var(--secondary));
            opacity: 0.2;
        }

        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .process-step .step-num {
            width: 48px;
            height: 48px;
            margin: 0 auto 18px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            color: #ffffff;
            box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
        }

        .process-step h4 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .process-step p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .section-dark .process-step h4 {
            color: #ffffff;
        }

        .section-dark .process-step p {
            color: rgba(255,255,255,0.6);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .faq-item:hover {
            border-color: rgba(37, 99, 235, 0.12);
        }

        .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            background: none;
            border: none;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-primary);
            text-align: left;
            cursor: pointer;
        }

        .faq-question i {
            font-size: 14px;
            color: var(--text-light);
            transition: var(--transition);
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1e3a5f 50%, var(--bg-dark) 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
        }

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

        .cta-section h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 16px;
        }

        .cta-section p {
            font-size: 16px;
            color: rgba(255,255,255,0.6);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        .cta-section .btn-primary {
            font-size: 18px;
            padding: 16px 44px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .site-logo {
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255,255,255,0.5);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255,255,255,0.5);
            padding: 4px 0;
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: #ffffff;
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: rgba(255,255,255,0.35);
        }

        .footer-bottom a {
            color: rgba(255,255,255,0.35);
        }

        .footer-bottom a:hover {
            color: rgba(255,255,255,0.6);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .feature-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .process-grid { grid-template-columns: repeat(2, 1fr); }
            .process-grid::before { display: none; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .site-header { height: 64px; }

            .nav-main {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(15, 23, 42, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 8px;
                border-bottom: 1px solid rgba(255,255,255,0.06);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                pointer-events: none;
            }

            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }

            .nav-main a {
                width: 100%;
                padding: 12px 16px;
                font-size: 15px;
            }

            .nav-main a.nav-cta {
                margin-top: 8px;
                text-align: center;
            }

            .nav-toggle { display: flex; }

            .site-logo { font-size: 18px; }
            .site-logo .logo-badge { font-size: 10px; padding: 1px 8px; }

            .hero { min-height: 70vh; }
            .hero h1 { font-size: 32px; }
            .hero p { font-size: 15px; }
            .hero-stats { gap: 24px; }
            .hero-stat .num { font-size: 24px; }

            .section { padding: 60px 0; }
            .section-header { margin-bottom: 36px; }

            .feature-grid { grid-template-columns: 1fr; gap: 16px; }
            .category-grid { grid-template-columns: 1fr; gap: 20px; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .process-grid { grid-template-columns: 1fr; gap: 32px; }

            .info-card { flex-direction: column; gap: 12px; padding: 16px; }
            .info-card .info-index { width: 32px; height: 32px; font-size: 14px; }

            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }

            .cta-section { padding: 56px 0; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 28px; }
            .hero-actions { flex-direction: column; align-items: center; }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary { width: 100%; justify-content: center; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-card .num { font-size: 28px; }
            .section-header h2 { font-size: 24px; }
        }

        /* ===== Misc Utilities ===== */
        .gap-2 { gap: 8px; }
        .gap-3 { gap: 12px; }
        .gap-4 { gap: 16px; }
        .gap-6 { gap: 24px; }
        .gap-8 { gap: 32px; }
        .flex-wrap { flex-wrap: wrap; }
        .items-center { align-items: center; }
        .justify-center { justify-content: center; }
        .text-center { text-align: center; }
        .mt-4 { margin-top: 16px; }
        .mt-6 { margin-top: 24px; }
        .mt-8 { margin-top: 32px; }
        .mb-4 { margin-bottom: 16px; }
        .mb-6 { margin-bottom: 24px; }
        .mb-8 { margin-bottom: 32px; }
        .w-full { width: 100%; }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --c-primary: #e74c3c;
            --c-primary-dark: #c0392b;
            --c-primary-light: #f5b7b1;
            --c-secondary: #f39c12;
            --c-secondary-light: #fdebd0;
            --c-accent: #3498db;
            --c-bg: #f8f9fa;
            --c-bg-alt: #ffffff;
            --c-bg-dark: #1a1a2e;
            --c-bg-card: #ffffff;
            --c-text: #2c3e50;
            --c-text-light: #7f8c8d;
            --c-text-white: #ffffff;
            --c-border: #e8e8e8;
            --c-border-light: #f0f0f0;
            --c-success: #27ae60;
            --c-shadow: 0 8px 30px rgba(0,0,0,0.08);
            --c-shadow-hover: 0 16px 48px rgba(231,76,60,0.15);
            --c-radius: 16px;
            --c-radius-sm: 8px;
            --c-radius-lg: 24px;
            --c-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-main: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-main);
            color: var(--c-text);
            background: var(--c-bg);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--c-transition); }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        input, textarea { font-family: inherit; outline: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; }

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

        /* ===== 头部导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--c-border-light);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: var(--c-transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 6px;
            font-weight: 800;
            font-size: 1.3rem;
            color: var(--c-text);
            flex-shrink: 0;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--c-primary);
            color: #fff;
            border-radius: var(--c-radius-sm);
            font-size: 1.2rem;
            font-weight: 800;
        }
        .logo-badge {
            font-size: 0.65rem;
            font-weight: 700;
            background: var(--c-secondary);
            color: #fff;
            padding: 2px 8px;
            border-radius: 20px;
            letter-spacing: 0.3px;
            margin-left: 2px;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--c-text);
            transition: var(--c-transition);
            position: relative;
        }
        .nav-main a:hover { background: var(--c-primary-light); color: var(--c-primary-dark); }
        .nav-main a.active { background: var(--c-primary); color: #fff; }
        .nav-main a.active:hover { background: var(--c-primary-dark); }
        .nav-cta {
            background: var(--c-primary) !important;
            color: #fff !important;
            padding: 8px 22px !important;
            font-weight: 600 !important;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-cta:hover { background: var(--c-primary-dark) !important; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(231,76,60,0.35) !important; }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            border-radius: var(--c-radius-sm);
            transition: var(--c-transition);
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--c-text);
            border-radius: 4px;
            transition: var(--c-transition);
        }
        .nav-toggle:hover { background: var(--c-border-light); }

        /* ===== 文章 Banner ===== */
        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,26,46,0.92) 0%, rgba(15,52,96,0.88) 100%);
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
        }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a { color: rgba(255,255,255,0.8); }
        .article-breadcrumb a:hover { color: var(--c-secondary); }
        .article-breadcrumb .sep { color: rgba(255,255,255,0.4); }
        .article-banner h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            max-width: 800px;
            line-height: 1.25;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.2);
        }
        .article-meta-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 30px;
            align-items: center;
        }
        .article-meta-bar .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
            color: rgba(255,255,255,0.75);
            font-size: 0.9rem;
        }
        .article-meta-bar .meta-item i { width: 16px; color: var(--c-secondary); }
        .article-meta-bar .category-tag {
            background: var(--c-secondary);
            color: #fff;
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
        }

        /* ===== 文章主体 ===== */
        .article-main {
            padding: 60px 0 80px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }
        .article-body {
            background: var(--c-bg-alt);
            border-radius: var(--c-radius);
            box-shadow: var(--c-shadow);
            padding: 40px 44px;
            overflow: hidden;
        }
        .article-body .featured-image {
            width: 100%;
            border-radius: var(--c-radius-sm);
            margin-bottom: 32px;
            box-shadow: 0 4px 16px rgba(0,0,0,0.06);
        }
        .article-body .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--c-text);
        }
        .article-body .article-content p {
            margin-bottom: 1.2em;
        }
        .article-body .article-content h2 {
            font-size: 1.5rem;
            margin: 2em 0 0.8em;
            padding-bottom: 0.4em;
            border-bottom: 3px solid var(--c-primary-light);
            color: var(--c-text);
        }
        .article-body .article-content h3 {
            font-size: 1.2rem;
            margin: 1.6em 0 0.6em;
            color: var(--c-text);
        }
        .article-body .article-content ul, .article-body .article-content ol {
            margin: 1em 0;
            padding-left: 1.6em;
        }
        .article-body .article-content ul li {
            list-style: disc;
            margin-bottom: 0.4em;
        }
        .article-body .article-content ol li {
            list-style: decimal;
            margin-bottom: 0.4em;
        }
        .article-body .article-content blockquote {
            border-left: 4px solid var(--c-primary);
            background: var(--c-primary-light);
            padding: 16px 24px;
            margin: 1.6em 0;
            border-radius: 0 var(--c-radius-sm) var(--c-radius-sm) 0;
            color: var(--c-text);
            font-style: italic;
        }
        .article-body .article-content img {
            border-radius: var(--c-radius-sm);
            margin: 1.6em auto;
            box-shadow: 0 4px 16px rgba(0,0,0,0.06);
        }
        .article-body .article-content a {
            color: var(--c-accent);
            border-bottom: 1px dashed var(--c-accent);
        }
        .article-body .article-content a:hover { color: var(--c-primary); border-bottom-color: var(--c-primary); }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--c-border);
        }
        .article-tags .tag {
            display: inline-block;
            padding: 6px 16px;
            background: var(--c-bg);
            border-radius: 20px;
            font-size: 0.85rem;
            color: var(--c-text-light);
            border: 1px solid var(--c-border);
            transition: var(--c-transition);
        }
        .article-tags .tag:hover { background: var(--c-primary-light); color: var(--c-primary-dark); border-color: var(--c-primary-light); }
        .article-nav {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--c-border);
        }
        .article-nav a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--c-radius-sm);
            background: var(--c-bg);
            border: 1px solid var(--c-border);
            font-size: 0.9rem;
            transition: var(--c-transition);
            max-width: 45%;
        }
        .article-nav a:hover { background: var(--c-primary-light); border-color: var(--c-primary-light); color: var(--c-primary-dark); }

        /* ===== 侧边栏 ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--c-bg-alt);
            border-radius: var(--c-radius);
            box-shadow: var(--c-shadow);
            padding: 28px 24px;
            overflow: hidden;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--c-primary-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--c-primary); }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--c-border-light);
            display: flex;
            gap: 12px;
            align-items: flex-start;
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list .thumb {
            width: 64px;
            height: 48px;
            border-radius: var(--c-radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--c-bg);
        }
        .sidebar-list .info { flex: 1; min-width: 0; }
        .sidebar-list .info a {
            font-size: 0.9rem;
            font-weight: 600;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.4;
            transition: var(--c-transition);
        }
        .sidebar-list .info a:hover { color: var(--c-primary); }
        .sidebar-list .info .date {
            font-size: 0.75rem;
            color: var(--c-text-light);
            margin-top: 4px;
        }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-dark) 100%);
            color: #fff;
            text-align: center;
            padding: 32px 24px;
        }
        .sidebar-cta h3 { color: #fff; border-bottom-color: rgba(255,255,255,0.3); }
        .sidebar-cta h3 i { color: var(--c-secondary); }
        .sidebar-cta p { font-size: 0.9rem; opacity: 0.9; margin-bottom: 20px; }
        .sidebar-cta .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--c-primary-dark);
            padding: 12px 32px;
            border-radius: 30px;
            font-weight: 700;
            transition: var(--c-transition);
        }
        .sidebar-cta .btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); }

        /* ===== 相关文章 ===== */
        .related-section {
            padding: 60px 0;
            background: var(--c-bg);
            border-top: 1px solid var(--c-border-light);
        }
        .related-section .section-title {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 32px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-section .section-title i { color: var(--c-primary); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--c-bg-alt);
            border-radius: var(--c-radius);
            overflow: hidden;
            box-shadow: var(--c-shadow);
            transition: var(--c-transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--c-shadow-hover); }
        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .related-card .card-body {
            padding: 20px 22px;
        }
        .related-card .card-body h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h4 a:hover { color: var(--c-primary); }
        .related-card .card-body .meta {
            font-size: 0.8rem;
            color: var(--c-text-light);
            display: flex;
            gap: 16px;
        }

        /* ===== 未找到文章 ===== */
        .not-found {
            text-align: center;
            padding: 80px 0;
        }
        .not-found .icon {
            font-size: 4rem;
            color: var(--c-text-light);
            margin-bottom: 24px;
        }
        .not-found h2 { font-size: 2rem; margin-bottom: 12px; }
        .not-found p { color: var(--c-text-light); margin-bottom: 24px; }
        .not-found .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--c-primary);
            color: #fff;
            padding: 14px 36px;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--c-transition);
        }
        .not-found .btn-home:hover { background: var(--c-primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(231,76,60,0.3); }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--c-bg-dark);
            color: rgba(255,255,255,0.85);
            padding: 60px 0 0;
        }
        .site-footer .site-logo { color: #fff; }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; opacity: 0.7; margin-top: 16px; max-width: 360px; }
        .footer-col h4 { font-size: 1.05rem; font-weight: 700; color: #fff; margin-bottom: 18px; position: relative; padding-bottom: 10px; }
        .footer-col h4::after { content: ''; position: absolute; bottom: 0; left: 0; width: 32px; height: 3px; background: var(--c-primary); border-radius: 2px; }
        .footer-col a { display: block; padding: 6px 0; font-size: 0.9rem; opacity: 0.7; transition: var(--c-transition); }
        .footer-col a:hover { opacity: 1; color: var(--c-secondary); padding-left: 4px; }
        .footer-col a i { margin-right: 8px; width: 18px; text-align: center; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.85rem;
            opacity: 0.6;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom a { color: var(--c-secondary); }
        .footer-bottom a:hover { text-decoration: underline; }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
        }
        @media (max-width: 768px) {
            :root { --header-height: 64px; }
            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--c-border);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--c-transition);
                box-shadow: 0 20px 40px rgba(0,0,0,0.08);
                z-index: 999;
            }
            .nav-main.open { transform: translateY(0); opacity: 1; }
            .nav-main a { width: 100%; text-align: center; padding: 12px 18px; }
            .nav-toggle { display: flex; }
            .article-banner h1 { font-size: 1.6rem; }
            .article-banner { padding: 60px 0 40px; min-height: 240px; }
            .article-body { padding: 24px 20px; }
            .article-body .article-content { font-size: 1rem; }
            .related-grid { grid-template-columns: 1fr; }
            .article-nav { flex-direction: column; }
            .article-nav a { max-width: 100%; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-banner h1 { font-size: 1.3rem; }
            .article-meta-bar { gap: 10px 16px; }
            .article-meta-bar .meta-item { font-size: 0.8rem; }
            .article-body { padding: 16px 14px; }
            .sidebar-card { padding: 20px 16px; }
            .related-card img { height: 140px; }
        }

        /* ===== 辅助 ===== */
        .text-center { text-align: center; }
        .mt-8 { margin-top: 8px; }
        .mb-8 { margin-bottom: 8px; }
        .mb-16 { margin-bottom: 16px; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --primary-bg: #eef2ff;
  --secondary: #f59e0b;
  --secondary-dark: #d97706;
  --accent: #8b5cf6;
  --success: #10b981;
  --danger: #ef4444;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-muted: #9ca3af;
  --text-on-primary: #ffffff;
  --border-color: #e5e7eb;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.10);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.16);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--gray-50);
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--gray-900); }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); }
h3 { font-size: clamp(1.1rem, 2.2vw, 1.4rem); }
h4 { font-size: 1.1rem; }
p { color: var(--text-secondary); margin-bottom: 1rem; }
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-title { text-align: center; margin-bottom: 16px; }
.section-subtitle { text-align: center; color: var(--text-muted); font-size: 1.05rem; max-width: 640px; margin: 0 auto 48px; }
.tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--primary-bg);
  color: var(--primary);
  letter-spacing: 0.3px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  background: var(--primary);
  color: var(--text-on-primary);
}
.btn:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); }
.btn-outline { background: transparent; border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-secondary { background: var(--secondary); color: #fff; }
.btn-secondary:hover { background: var(--secondary-dark); color: #fff; }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.card {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.card-img { width: 100%; height: 200px; object-fit: cover; border-radius: 0; }
.card-body { padding: 24px; }
.card-tag { margin-bottom: 10px; }
.card-title { font-size: 1.1rem; margin-bottom: 10px; }
.card-text { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.6; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--gray-100);
  color: var(--gray-600);
}
.badge-primary { background: var(--primary-bg); color: var(--primary); }
.badge-success { background: #d1fae5; color: #065f46; }
.badge-warning { background: #fef3c7; color: #92400e; }
.text-center { text-align: center; }
.mt-2 { margin-top: 16px; }
.mt-4 { margin-top: 32px; }
.mb-2 { margin-bottom: 16px; }
.mb-4 { margin-bottom: 32px; }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--gray-200);
  height: var(--header-height);
  display: flex;
  align-items: center;
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; }
.site-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--gray-900);
  text-decoration: none;
}
.site-logo:hover { color: var(--gray-900); }
.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 1.2rem;
  font-weight: 700;
}
.logo-badge {
  font-size: 0.6rem;
  font-weight: 700;
  background: var(--secondary);
  color: #fff;
  padding: 2px 10px;
  border-radius: 50px;
  letter-spacing: 0.5px;
}
.nav-main { display: flex; align-items: center; gap: 8px; }
.nav-main a {
  padding: 8px 18px;
  border-radius: 50px;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--gray-600);
  transition: var(--transition);
  text-decoration: none;
}
.nav-main a:hover { background: var(--gray-100); color: var(--gray-900); }
.nav-main a.active { background: var(--primary); color: #fff; }
.nav-cta {
  background: var(--primary) !important;
  color: #fff !important;
  padding: 8px 24px !important;
  border-radius: 50px !important;
  font-weight: 600 !important;
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-cta:hover { background: var(--primary-dark) !important; color: #fff !important; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 26px; height: 2.5px; background: var(--gray-800); border-radius: 4px; transition: var(--transition); }

/* ===== Hero / Banner ===== */
.page-banner {
  position: relative;
  padding: 100px 0 80px;
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #7c3aed 100%);
  overflow: hidden;
  min-height: 320px;
  display: flex;
  align-items: center;
}
.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.20;
  mix-blend-mode: overlay;
}
.page-banner .container { position: relative; z-index: 1; text-align: center; }
.page-banner h1 { color: #fff; font-size: clamp(2rem, 4.5vw, 3rem); margin-bottom: 16px; text-shadow: 0 2px 12px rgba(0,0,0,0.2); }
.page-banner p { color: rgba(255,255,255,0.85); font-size: 1.1rem; max-width: 640px; margin: 0 auto; }
.banner-breadcrumb { display: flex; justify-content: center; gap: 8px; margin-bottom: 24px; font-size: 0.9rem; color: rgba(255,255,255,0.7); }
.banner-breadcrumb a { color: rgba(255,255,255,0.8); }
.banner-breadcrumb a:hover { color: #fff; }
.banner-breadcrumb span { color: rgba(255,255,255,0.5); }

/* ===== Intro Section ===== */
.intro-section { background: #fff; }
.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.intro-image { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.intro-image img { width: 100%; height: 380px; object-fit: cover; border-radius: var(--radius-lg); }
.intro-content h2 { margin-bottom: 16px; }
.intro-content p { margin-bottom: 16px; font-size: 1rem; }
.intro-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 28px; }
.stat-item { text-align: center; padding: 16px; background: var(--gray-50); border-radius: var(--radius-md); }
.stat-number { font-size: 1.6rem; font-weight: 800; color: var(--primary); }
.stat-label { font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }

/* ===== Category Cards ===== */
.category-section { background: var(--gray-50); }
.category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.category-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--gray-100);
}
.category-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); border-color: var(--primary-bg); }
.category-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: var(--primary-bg);
  color: var(--primary);
  font-size: 1.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  transition: var(--transition);
}
.category-card:hover .category-icon { background: var(--primary); color: #fff; }
.category-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.category-card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 16px; }

/* ===== Content List ===== */
.content-section { background: #fff; }
.content-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.content-card {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--gray-100);
}
.content-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.content-card .card-img-top { width: 100%; height: 200px; object-fit: cover; border-radius: 0; }
.content-card .card-body { padding: 24px; }
.content-card .card-meta { display: flex; align-items: center; gap: 12px; font-size: 0.8rem; color: var(--text-muted); margin-bottom: 12px; }
.content-card .card-meta i { margin-right: 4px; }
.content-card h3 { font-size: 1.05rem; margin-bottom: 10px; }
.content-card h3 a { color: var(--gray-900); }
.content-card h3 a:hover { color: var(--primary); }
.content-card p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 16px; }
.content-card .read-more { font-weight: 600; font-size: 0.9rem; color: var(--primary); display: inline-flex; align-items: center; gap: 4px; }
.content-card .read-more:hover { gap: 8px; }

/* ===== Features / Process ===== */
.features-section {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #fff;
}
.features-section .section-title { color: #fff; }
.features-section .section-subtitle { color: rgba(255,255,255,0.65); }
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature-card {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-md);
  padding: 32px 20px;
  text-align: center;
  transition: var(--transition);
}
.feature-card:hover { background: rgba(255,255,255,0.12); transform: translateY(-4px); }
.feature-card .feature-icon { font-size: 2rem; color: var(--secondary); margin-bottom: 16px; }
.feature-card h4 { color: #fff; font-size: 1rem; margin-bottom: 8px; }
.feature-card p { color: rgba(255,255,255,0.65); font-size: 0.85rem; margin-bottom: 0; }
.feature-step { display: flex; align-items: center; justify-content: center; gap: 12px; margin-bottom: 12px; }
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--secondary);
  color: #fff;
  font-weight: 800;
  font-size: 0.9rem;
}

/* ===== FAQ ===== */
.faq-section { background: var(--gray-50); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  border: 1px solid var(--gray-100);
}
.faq-question {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--gray-900);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
  background: #fff;
}
.faq-question:hover { background: var(--gray-50); }
.faq-question i { color: var(--primary); transition: var(--transition); font-size: 1.1rem; }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}
.faq-answer p { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 0; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  opacity: 0.10;
  mix-blend-mode: overlay;
}
.cta-section .container { position: relative; z-index: 1; }
.cta-section h2 { color: #fff; font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 16px; }
.cta-section p { color: rgba(255,255,255,0.85); font-size: 1.1rem; max-width: 560px; margin: 0 auto 32px; }
.cta-buttons { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.cta-buttons .btn { background: #fff; color: var(--primary); }
.cta-buttons .btn:hover { background: var(--gray-100); color: var(--primary-dark); }
.cta-buttons .btn-outline-light { background: transparent; border-color: #fff; color: #fff; }
.cta-buttons .btn-outline-light:hover { background: #fff; color: var(--primary); }

/* ===== Footer ===== */
.site-footer { background: var(--gray-900); color: rgba(255,255,255,0.75); padding: 64px 0 32px; }
.site-footer .site-logo { color: #fff; margin-bottom: 16px; }
.site-footer .site-logo:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.55); margin-top: 12px; max-width: 320px; }
.footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 18px; font-weight: 600; }
.footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 0.9rem; margin-bottom: 10px; transition: var(--transition); }
.footer-col a:hover { color: #fff; padding-left: 4px; }
.footer-col a i { width: 20px; margin-right: 6px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.45);
}
.footer-bottom a { color: rgba(255,255,255,0.6); }
.footer-bottom a:hover { color: #fff; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .intro-grid { gap: 32px; }
}
@media (max-width: 768px) {
  .nav-main { display: none; position: absolute; top: var(--header-height); left: 0; right: 0; background: #fff; flex-direction: column; padding: 16px 24px; box-shadow: var(--shadow-lg); border-radius: 0 0 var(--radius-md) var(--radius-md); gap: 4px; }
  .nav-main.open { display: flex; }
  .nav-toggle { display: flex; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 20px; }
  .intro-grid { grid-template-columns: 1fr; }
  .intro-image { order: -1; }
  .intro-stats { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .features-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .page-banner { padding: 70px 0 50px; min-height: 240px; }
  .section { padding: 50px 0; }
  .content-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .cta-section { padding: 50px 0; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .features-grid { grid-template-columns: 1fr; }
  .intro-stats { grid-template-columns: 1fr; }
  .stat-item { padding: 12px; }
  .faq-question { padding: 16px 18px; font-size: 0.95rem; }
  .faq-answer { padding: 0 18px; }
  .faq-item.active .faq-answer { padding: 0 18px 16px; }
  .page-banner h1 { font-size: 1.6rem; }
  .page-banner p { font-size: 0.95rem; }
  .btn-lg { padding: 12px 24px; font-size: 0.95rem; }
  .cta-buttons { flex-direction: column; align-items: center; }
}