/* roulang page: index */
:root {
            --brand-600: #4A3A8A;
            --brand-700: #3d2f72;
            --brand-800: #2f2359;
            --gold-500: #F0A500;
            --gold-600: #d49400;
            --surface: #F8F7FC;
            --card: #ffffff;
            --muted: #6b7280;
            --deep: #1a1a2e;
            --radius-xl: 12px;
            --radius-2xl: 16px;
            --radius-3xl: 24px;
            --shadow-soft: 0 2px 16px rgba(74, 58, 138, 0.07);
            --shadow-soft-lg: 0 8px 32px rgba(74, 58, 138, 0.10);
            --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 20px rgba(74, 58, 138, 0.06);
            --shadow-card-hover: 0 2px 8px rgba(0, 0, 0, 0.06), 0 12px 36px rgba(74, 58, 138, 0.12);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: var(--deep);
            background-color: var(--surface);
            min-height: 100vh;
        }

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

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

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

        button {
            cursor: pointer;
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: #ffffff;
            box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04), 0 2px 12px rgba(0, 0, 0, 0.03);
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06), 0 4px 20px rgba(0, 0, 0, 0.08);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 20px;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--brand-600);
            white-space: nowrap;
            letter-spacing: -0.01em;
            transition: opacity var(--transition-base);
        }
        .logo-link:hover {
            opacity: 0.82;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-600), #6b5bbf);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }
        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: 8px;
            font-weight: 500;
            font-size: 0.95rem;
            color: #4b5563;
            transition: all var(--transition-base);
            white-space: nowrap;
        }
        .nav-links a:hover {
            color: var(--brand-600);
            background: #f4f3fb;
        }
        .nav-links a.active {
            color: var(--brand-600);
            background: #f4f3fb;
            font-weight: 600;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: #f3f4f6;
            border-radius: 24px;
            padding: 8px 16px;
            gap: 8px;
            transition: all var(--transition-base);
            border: 2px solid transparent;
        }
        .search-box:focus-within {
            border-color: var(--brand-600);
            background: #fff;
            box-shadow: 0 0 0 4px rgba(74, 58, 138, 0.06);
        }
        .search-box input {
            width: 140px;
            font-size: 0.9rem;
            color: var(--deep);
            background: transparent;
        }
        .search-box input::placeholder {
            color: #9ca3af;
        }
        .search-box .fa-search {
            color: #9ca3af;
            font-size: 0.9rem;
        }
        .btn-cta-nav {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: 24px;
            font-weight: 600;
            font-size: 0.9rem;
            background: var(--brand-600);
            color: #fff;
            transition: all var(--transition-base);
            white-space: nowrap;
            box-shadow: 0 2px 8px rgba(74, 58, 138, 0.25);
        }
        .btn-cta-nav:hover {
            background: var(--brand-700);
            box-shadow: 0 4px 16px rgba(74, 58, 138, 0.35);
            transform: translateY(-1px);
        }
        .btn-cta-nav:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(74, 58, 138, 0.25);
        }
        .mobile-menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--brand-600);
            background: #f4f3fb;
            transition: all var(--transition-base);
        }
        .mobile-menu-toggle:hover {
            background: #e8e5f7;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            background: linear-gradient(160deg, #1f1740 0%, #2f2359 30%, #3d2f72 60%, #4A3A8A 100%);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            min-height: 560px;
            display: flex;
            align-items: center;
            overflow: hidden;
            color: #fff;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(240, 165, 0, 0.12) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 30%, rgba(139, 128, 210, 0.18) 0%, transparent 55%);
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 640px;
            padding: 60px 0;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 6px 16px;
            border-radius: 24px;
            font-size: 0.85rem;
            font-weight: 500;
            color: #f7c948;
            margin-bottom: 20px;
        }
        .hero-badge .fa-circle {
            font-size: 0.5rem;
            color: #4ade80;
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.35;
            }
        }
        .hero-title {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .hero-title span {
            background: linear-gradient(135deg, #f7c948 0%, #F0A500 50%, #f59e0b 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 32px;
            line-height: 1.7;
            max-width: 500px;
        }
        .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: 28px;
            font-weight: 600;
            font-size: 1rem;
            background: var(--gold-500);
            color: #1a1a2e;
            transition: all var(--transition-base);
            box-shadow: 0 4px 20px rgba(240, 165, 0, 0.35);
        }
        .btn-hero-primary:hover {
            background: #f7c948;
            box-shadow: 0 6px 28px rgba(240, 165, 0, 0.5);
            transform: translateY(-2px);
        }
        .btn-hero-primary:active {
            transform: translateY(0);
        }
        .btn-hero-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 28px;
            font-weight: 600;
            font-size: 1rem;
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.4);
            transition: all var(--transition-base);
        }
        .btn-hero-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }
        .hero-visual {
            position: absolute;
            right: -40px;
            top: 50%;
            transform: translateY(-50%);
            z-index: 1;
            opacity: 0.6;
            pointer-events: none;
        }
        .hero-visual .floating-shape {
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(240, 165, 0, 0.2) 0%, transparent 70%);
            animation: float-shape 6s ease-in-out infinite;
        }
        @keyframes float-shape {
            0%,
            100% {
                transform: translateY(0) scale(1);
            }
            50% {
                transform: translateY(-24px) scale(1.05);
            }
        }

        /* ===== Section Common ===== */
        .section {
            padding: 72px 0;
        }
        .section-sm {
            padding: 48px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--brand-600);
            background: #f4f3fb;
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--deep);
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--muted);
            max-width: 560px;
            margin: 0 auto;
        }

        /* ===== Cards Grid ===== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .card-feature {
            background: var(--card);
            border-radius: var(--radius-2xl);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            border: 1px solid transparent;
            position: relative;
            overflow: hidden;
        }
        .card-feature:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: #e8e5f7;
        }
        .card-feature .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 18px;
            flex-shrink: 0;
        }
        .card-feature .card-icon.blue {
            background: #eff6ff;
            color: #3b82f6;
        }
        .card-feature .card-icon.purple {
            background: #f4f3fb;
            color: #6b5bbf;
        }
        .card-feature .card-icon.green {
            background: #ecfdf5;
            color: #10b981;
        }
        .card-feature h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--deep);
        }
        .card-feature p {
            font-size: 0.9rem;
            color: var(--muted);
            line-height: 1.65;
        }

        /* ===== Category Entry Cards ===== */
        .category-entry-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .card-category {
            background: var(--card);
            border-radius: var(--radius-2xl);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            border: 1px solid transparent;
            display: flex;
            flex-direction: column;
        }
        .card-category:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: #e8e5f7;
        }
        .card-category .card-cat-img {
            height: 180px;
            object-fit: cover;
            width: 100%;
        }
        .card-category .card-cat-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-category .card-cat-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--brand-600);
            background: #f4f3fb;
            padding: 3px 12px;
            border-radius: 14px;
            margin-bottom: 10px;
            width: fit-content;
        }
        .card-category h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--deep);
        }
        .card-category p {
            font-size: 0.9rem;
            color: var(--muted);
            line-height: 1.6;
            flex: 1;
        }
        .card-category .card-cat-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--brand-600);
            margin-top: 12px;
            transition: gap var(--transition-base);
        }
        .card-category .card-cat-link:hover {
            gap: 10px;
        }

        /* ===== Steps / Timeline ===== */
        .steps-list {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .step-item {
            flex: 1;
            min-width: 200px;
            max-width: 260px;
            text-align: center;
            position: relative;
            padding: 28px 20px;
            background: var(--card);
            border-radius: var(--radius-2xl);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }
        .step-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand-600), #6b5bbf);
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            box-shadow: 0 4px 14px rgba(74, 58, 138, 0.3);
        }
        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--deep);
        }
        .step-item p {
            font-size: 0.85rem;
            color: var(--muted);
            line-height: 1.6;
        }
        .step-connector {
            display: none;
            position: absolute;
            top: 52px;
            right: -32px;
            width: 40px;
            height: 2px;
            background: #e5e7eb;
        }

        /* ===== News List ===== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }
        .news-item {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--card);
            padding: 16px 20px;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            border: 1px solid transparent;
        }
        .news-item:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: #e8e5f7;
            transform: translateX(4px);
        }
        .news-item .news-date {
            font-size: 0.8rem;
            color: var(--muted);
            white-space: nowrap;
            min-width: 80px;
            text-align: center;
            background: #f9fafb;
            padding: 6px 10px;
            border-radius: 8px;
            font-weight: 500;
        }
        .news-item .news-cat-tag {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--brand-600);
            background: #f4f3fb;
            padding: 4px 10px;
            border-radius: 12px;
            white-space: nowrap;
        }
        .news-item .news-title {
            flex: 1;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--deep);
            transition: color var(--transition-base);
            line-height: 1.4;
        }
        .news-item:hover .news-title {
            color: var(--brand-600);
        }
        .news-item .news-arrow {
            color: #cbd5e1;
            transition: all var(--transition-base);
            flex-shrink: 0;
        }
        .news-item:hover .news-arrow {
            color: var(--brand-600);
            transform: translateX(3px);
        }
        .news-empty {
            text-align: center;
            color: var(--muted);
            padding: 32px;
            font-size: 0.95rem;
            background: var(--card);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-card);
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-card {
            text-align: center;
            background: var(--card);
            padding: 28px 16px;
            border-radius: var(--radius-2xl);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--brand-600);
            letter-spacing: -0.02em;
            margin-bottom: 4px;
        }
        .stat-label {
            font-size: 0.85rem;
            color: var(--muted);
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: var(--card);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-card);
            border: 1px solid transparent;
            overflow: hidden;
            transition: all var(--transition-base);
        }
        .faq-item:hover {
            border-color: #e8e5f7;
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--deep);
            text-align: left;
            transition: color var(--transition-base);
            gap: 12px;
        }
        .faq-question:hover {
            color: var(--brand-600);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: #f4f3fb;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            color: var(--brand-600);
            transition: all var(--transition-base);
        }
        .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.9rem;
            color: var(--muted);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--brand-600);
            color: #fff;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(150deg, #1f1740 0%, #3d2f72 50%, #4A3A8A 100%);
            border-radius: var(--radius-3xl);
            padding: 56px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
            margin: 0 24px;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 30%, rgba(240, 165, 0, 0.15) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 1;
        }
        .cta-title {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }
        .cta-desc {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 28px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-cta-lg {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 15px 36px;
            border-radius: 28px;
            font-weight: 700;
            font-size: 1rem;
            background: var(--gold-500);
            color: #1a1a2e;
            transition: all var(--transition-base);
            box-shadow: 0 6px 24px rgba(240, 165, 0, 0.4);
        }
        .btn-cta-lg:hover {
            background: #f7c948;
            box-shadow: 0 8px 32px rgba(240, 165, 0, 0.55);
            transform: translateY(-2px);
        }
        .btn-cta-lg:active {
            transform: translateY(0);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #fff;
            border-top: 1px solid #f3f4f6;
            padding: 40px 0;
            margin-top: 48px;
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
        }
        .footer-brand {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--brand-600);
        }
        .footer-links {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            list-style: none;
        }
        .footer-links a {
            font-size: 0.85rem;
            color: var(--muted);
            transition: color var(--transition-base);
        }
        .footer-links a:hover {
            color: var(--brand-600);
        }
        .footer-copy {
            font-size: 0.8rem;
            color: #9ca3af;
            width: 100%;
            text-align: center;
            margin-top: 16px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-entry-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-visual {
                right: -100px;
                opacity: 0.35;
            }
            .hero-visual .floating-shape {
                width: 240px;
                height: 240px;
            }
            .steps-list {
                gap: 14px;
            }
            .step-item {
                min-width: 160px;
                max-width: 220px;
                padding: 22px 14px;
            }
            .search-box input {
                width: 100px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 56px;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 56px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 12px 16px;
                gap: 2px;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
                border-radius: 0 0 16px 16px;
                z-index: 99;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                width: 100%;
                padding: 12px 16px;
                border-radius: 10px;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .header-actions .search-box {
                display: none;
            }
            .header-actions .btn-cta-nav {
                padding: 8px 16px;
                font-size: 0.82rem;
            }
            .cards-grid {
                grid-template-columns: 1fr;
            }
            .category-entry-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .hero-section {
                min-height: 440px;
            }
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .hero-content {
                padding: 40px 0;
            }
            .hero-visual {
                display: none;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .steps-list {
                flex-direction: column;
                align-items: center;
            }
            .step-item {
                max-width: 100%;
                width: 100%;
            }
            .news-item {
                flex-wrap: wrap;
                gap: 8px;
                padding: 14px 16px;
            }
            .news-item .news-date {
                min-width: auto;
                font-size: 0.75rem;
            }
            .cta-section {
                margin: 0 12px;
                padding: 40px 20px;
                border-radius: var(--radius-2xl);
            }
            .cta-title {
                font-size: 1.4rem;
            }
            .footer-inner {
                flex-direction: column;
                text-align: center;
            }
            .footer-links {
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-title {
                font-size: 1.5rem;
            }
            .hero-desc {
                font-size: 0.85rem;
            }
            .hero-buttons {
                flex-direction: column;
            }
            .btn-hero-primary,
            .btn-hero-outline {
                width: 100%;
                justify-content: center;
                padding: 12px 20px;
                font-size: 0.9rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-number {
                font-size: 1.6rem;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .card-feature {
                padding: 22px 18px;
            }
            .card-category .card-cat-img {
                height: 140px;
            }
            .logo-link {
                font-size: 1rem;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
                border-radius: 8px;
            }
            .btn-cta-nav {
                padding: 7px 14px;
                font-size: 0.78rem;
            }
        }

        @media (min-width: 769px) {
            .nav-links {
                display: flex !important;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #4F46E5;
            --primary-light: #6366F1;
            --primary-dark: #3730A3;
            --primary-bg: #EEF2FF;
            --accent: #F59E0B;
            --accent-light: #FCD34D;
            --accent-bg: #FFFBEB;
            --text: #1E293B;
            --text-secondary: #64748B;
            --text-muted: #94A3B8;
            --bg: #FFFFFF;
            --bg-warm: #FFFBEB;
            --bg-soft: #F8FAFC;
            --bg-card: #FFFFFF;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08), 0 8px 28px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.1), 0 20px 48px rgba(0, 0, 0, 0.06);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.12);
            --radius-sm: 8px;
            --radius: 12px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --radius-xl: 24px;
            --radius-full: 9999px;
            --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
        }

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

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

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

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

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

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

        ul,
        ol {
            list-style: none;
        }

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

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 20px;
        }

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

        .logo i {
            font-size: 1.5rem;
            color: var(--primary);
            background: var(--primary-bg);
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
        }

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

        .nav-links li a {
            display: inline-block;
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
        }

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

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

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-soft);
            border: 1px solid var(--border);
            border-radius: var(--radius-full);
            padding: 8px 16px;
            gap: 8px;
            transition: all var(--transition);
        }

        .search-box:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
            background: var(--bg);
        }

        .search-box input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.875rem;
            color: var(--text);
            width: 140px;
        }

        .search-box input::placeholder {
            color: var(--text-muted);
        }

        .search-box button {
            background: none;
            border: none;
            color: var(--text-muted);
            cursor: pointer;
            padding: 2px;
            transition: color var(--transition);
        }

        .search-box button:hover {
            color: var(--primary);
        }

        .btn-cta-nav {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.875rem;
            transition: all var(--transition);
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }

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

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            padding: 6px;
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            background: linear-gradient(160deg, #EEF2FF 0%, #E0E7FF 30%, #F8FAFC 70%, #FFFBEB 100%);
            padding: 64px 0 56px;
            text-align: center;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-banner .container {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--primary);
            font-weight: 500;
        }

        .breadcrumb a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

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

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

        .page-banner h1 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .page-banner .banner-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 8px;
            line-height: 1.6;
        }

        .page-banner .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

        /* ========== MAIN CONTENT ========== */
        .main-content {
            flex: 1;
            padding: 48px 0 64px;
        }

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

        /* ========== ARTICLE LIST ========== */
        .articles-section {}

        .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .section-header h2 {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text);
        }

        .sort-tabs {
            display: flex;
            gap: 4px;
            background: var(--bg);
            border-radius: var(--radius-full);
            padding: 4px;
            border: 1px solid var(--border);
        }

        .sort-tab {
            padding: 7px 16px;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition);
            border: none;
            background: transparent;
        }

        .sort-tab.active,
        .sort-tab:hover {
            background: var(--primary);
            color: #fff;
        }

        .article-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }

        .article-card {
            display: grid;
            grid-template-columns: 220px 1fr;
            gap: 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-slow);
            cursor: pointer;
        }

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

        .article-card .card-img {
            position: relative;
            overflow: hidden;
            min-height: 100%;
            background: var(--bg-soft);
        }

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

        .article-card:hover .card-img img {
            transform: scale(1.05);
        }

        .article-card .card-body {
            padding: 20px 20px 20px 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 10px;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .card-meta .tag {
            display: inline-block;
            background: var(--accent-bg);
            color: var(--accent);
            padding: 3px 10px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.75rem;
        }

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

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

        .article-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.5;
            transition: color var(--transition);
        }

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

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

        .article-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--primary);
            transition: gap var(--transition);
        }

        .article-card:hover .card-link {
            gap: 8px;
            color: var(--primary-dark);
        }

        /* ========== SIDEBAR ========== */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .sidebar-widget {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
        }

        .sidebar-widget h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-widget h3 i {
            color: var(--primary);
            font-size: 1rem;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag-cloud .tag-item {
            display: inline-block;
            padding: 6px 14px;
            background: var(--bg-soft);
            color: var(--text-secondary);
            border-radius: var(--radius-full);
            font-size: 0.825rem;
            font-weight: 500;
            transition: all var(--transition);
            border: 1px solid transparent;
        }

        .tag-cloud .tag-item:hover {
            background: var(--primary-bg);
            color: var(--primary);
            border-color: var(--primary-light);
        }

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

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

        .hot-item:hover {
            background: var(--bg-soft);
        }

        .hot-rank {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.85rem;
            color: #fff;
        }

        .hot-rank.r1 {
            background: #EF4444;
        }
        .hot-rank.r2 {
            background: #F59E0B;
        }
        .hot-rank.r3 {
            background: #3B82F6;
        }
        .hot-rank.rn {
            background: #94A3B8;
        }

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

        .hot-item .hot-title {
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

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

        .hot-item .hot-views {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* ========== PAGINATION ========== */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            margin-top: 36px;
            flex-wrap: wrap;
        }

        .pagination .page-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 14px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border);
            cursor: pointer;
            transition: all var(--transition);
        }

        .pagination .page-btn:hover {
            border-color: var(--primary-light);
            color: var(--primary);
            background: var(--primary-bg);
        }

        .pagination .page-btn.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            font-weight: 700;
        }

        .pagination .page-btn.disabled {
            opacity: 0.4;
            pointer-events: none;
        }

        /* ========== FAQ SECTION ========== */
        .faq-section {
            padding: 64px 0;
            background: var(--bg);
            border-top: 1px solid var(--border-light);
        }

        .faq-section .section-title {
            text-align: center;
            margin-bottom: 40px;
        }

        .faq-section .section-title h2 {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 8px;
        }

        .faq-section .section-title p {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-soft);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            cursor: pointer;
        }

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

        .faq-item h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

        .faq-item h4 i {
            color: var(--primary);
            font-size: 0.85rem;
            margin-top: 3px;
            flex-shrink: 0;
        }

        .faq-item p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.6;
            padding-left: 24px;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: 64px 0;
            background: linear-gradient(160deg, #EEF2FF 0%, #E0E7FF 50%, #F8FAFC 100%);
            text-align: center;
        }

        .cta-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            box-shadow: var(--shadow-lg);
            max-width: 700px;
            margin: 0 auto;
            border: 1px solid var(--border-light);
        }

        .cta-card h2 {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
        }

        .cta-card p {
            color: var(--text-secondary);
            font-size: 1rem;
            margin-bottom: 24px;
            line-height: 1.6;
        }

        .cta-card .btn-cta-lg {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
        }

        .cta-card .btn-cta-lg:hover {
            background: var(--primary-dark);
            box-shadow: 0 8px 28px rgba(79, 70, 229, 0.4);
            transform: translateY(-2px);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--text);
            color: #CBD5E1;
            padding: 40px 0 28px;
            margin-top: auto;
        }

        .footer-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 24px;
            padding-bottom: 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.02em;
        }

        .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .footer-links li a {
            color: #94A3B8;
            font-size: 0.9rem;
            transition: color var(--transition);
        }

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

        .footer-copy {
            text-align: center;
            font-size: 0.825rem;
            color: #64748B;
        }

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

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

            .sidebar-widget {
                padding: 20px;
            }

            .article-card {
                grid-template-columns: 180px 1fr;
                gap: 16px;
            }

            .article-card .card-body {
                padding: 16px 16px 16px 0;
            }

            .faq-grid {
                grid-template-columns: 1fr;
                max-width: 600px;
            }

            .page-banner h1 {
                font-size: 2rem;
            }
        }

        @media (max-width: 768px) {
            .header-actions .search-box {
                display: none;
            }

            .btn-cta-nav {
                padding: 8px 16px;
                font-size: 0.8rem;
            }

            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: var(--bg);
                flex-direction: column;
                padding: 16px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                display: none;
                z-index: 999;
            }

            .nav-links.show {
                display: flex;
            }

            .nav-links li a {
                width: 100%;
                text-align: center;
                padding: 10px 16px;
            }

            .mobile-toggle {
                display: block;
            }

            .article-card {
                grid-template-columns: 1fr;
                gap: 0;
            }

            .article-card .card-img {
                height: 200px;
                min-height: auto;
            }

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

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

            .page-banner {
                padding: 40px 0 36px;
            }

            .page-banner h1 {
                font-size: 1.6rem;
            }

            .page-banner .banner-subtitle {
                font-size: 0.95rem;
            }

            .section-header {
                flex-direction: column;
                align-items: flex-start;
            }

            .sort-tabs {
                width: 100%;
                justify-content: center;
            }

            .cta-card {
                padding: 32px 20px;
            }

            .cta-card h2 {
                font-size: 1.35rem;
            }

            .pagination .page-btn {
                min-width: 36px;
                height: 36px;
                font-size: 0.8rem;
                padding: 0 10px;
            }
        }

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

            .logo {
                font-size: 1rem;
            }

            .logo i {
                width: 32px;
                height: 32px;
                font-size: 1.1rem;
            }

            .page-banner h1 {
                font-size: 1.35rem;
            }

            .article-card .card-img {
                height: 160px;
            }

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

            .faq-item {
                padding: 16px;
            }

            .faq-item h4 {
                font-size: 0.875rem;
            }

            .footer-inner {
                flex-direction: column;
                text-align: center;
            }

            .footer-links {
                justify-content: center;
            }
        }

/* roulang page: article */
:root {
            --primary: #4F6EF7;
            --primary-light: #EEF1FE;
            --primary-dark: #3A54D4;
            --accent: #F6A623;
            --accent-light: #FFF8ED;
            --bg: #F7F8FC;
            --bg-white: #FFFFFF;
            --text: #1a1a2e;
            --text-secondary: #6b7280;
            --text-muted: #9ca3af;
            --border: #e5e7eb;
            --border-light: #f3f4f6;
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 14px;
            --radius-xl: 18px;
            --shadow-xs: 0 1px 3px rgba(0,0,0,0.04);
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 30px rgba(0,0,0,0.10);
            --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            --nav-height: 68px;
            --container-max: 1140px;
            --container-narrow: 800px;
            --transition: 0.2s ease;
        }

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

        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
        }
        a { color: inherit; text-decoration: none; }
        img { max-width: 100%; height: auto; display: block; }
        button { cursor: pointer; font-family: inherit; border: none; outline: none; }
        ul, ol { list-style: none; }

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

        /* Header & Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-xs);
            height: var(--nav-height);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--primary);
            white-space: nowrap;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary) 0%, #7B8FF9 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            padding: 8px 16px;
            border-radius: var(--radius);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-links a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 24px;
            padding: 8px 16px;
            gap: 8px;
            transition: all var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(79,110,247,0.1);
        }
        .nav-search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.9rem;
            width: 140px;
            color: var(--text);
        }
        .nav-search input::placeholder { color: var(--text-muted); }
        .nav-search .search-icon {
            color: var(--text-muted);
            font-size: 1rem;
            flex-shrink: 0;
        }
        .btn-nav-cta {
            padding: 9px 20px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            background: var(--primary);
            color: #fff;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .btn-nav-cta:hover {
            background: var(--primary-dark);
            box-shadow: var(--shadow-sm);
            transform: translateY(-1px);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            padding: 8px;
            border-radius: var(--radius-sm);
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--text);
            border-radius: 2px;
            transition: all var(--transition);
        }

        /* Article Header */
        .article-header-section {
            background: linear-gradient(180deg, #EEF1FE 0%, var(--bg) 100%);
            padding: 48px 0 32px;
            position: relative;
            overflow: hidden;
        }
        .article-header-section::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -60px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(79,110,247,0.04);
            pointer-events: none;
        }
        .article-header-section::after {
            content: '';
            position: absolute;
            bottom: -50px;
            left: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(246,166,35,0.05);
            pointer-events: none;
        }
        .article-header-section .container-narrow {
            position: relative;
            z-index: 1;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb .sep { color: var(--text-muted); font-size: 0.75rem; }
        .breadcrumb .current { color: var(--text); font-weight: 500; }
        .article-category-tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 600;
            background: var(--accent-light);
            color: var(--accent);
            margin-bottom: 14px;
        }
        .article-title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 18px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta .meta-dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--text-muted);
        }

        /* Article Body */
        .article-body-section {
            padding: 32px 0 56px;
        }
        .article-featured-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 32px;
            box-shadow: var(--shadow);
        }
        .article-featured-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 16 / 9;
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text);
        }
        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 36px 0 16px;
            color: var(--text);
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-light);
        }
        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 28px 0 12px;
            color: var(--text);
        }
        .article-content p {
            margin-bottom: 18px;
        }
        .article-content ul,
        .article-content ol {
            margin: 12px 0 18px 20px;
        }
        .article-content ul { list-style: disc; }
        .article-content ol { list-style: decimal; }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 20px;
            margin: 24px 0;
            border-radius: 0 var(--radius) var(--radius) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content img {
            border-radius: var(--radius);
            margin: 20px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content a:hover {
            color: var(--primary-dark);
        }
        .article-content code {
            background: var(--bg);
            padding: 3px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: #e74c3c;
        }
        .article-content pre {
            background: #1a1a2e;
            color: #e2e8f0;
            padding: 20px 24px;
            border-radius: var(--radius);
            overflow-x: auto;
            margin: 20px 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* Not Found */
        .not-found-block {
            text-align: center;
            padding: 60px 24px;
        }
        .not-found-icon {
            font-size: 4rem;
            margin-bottom: 20px;
            display: block;
        }
        .not-found-block h2 {
            font-size: 1.6rem;
            margin-bottom: 12px;
            color: var(--text);
        }
        .not-found-block p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .btn-back {
            display: inline-block;
            padding: 12px 28px;
            border-radius: 24px;
            font-weight: 600;
            background: var(--primary);
            color: #fff;
            transition: all var(--transition);
        }
        .btn-back:hover {
            background: var(--primary-dark);
            box-shadow: var(--shadow);
            transform: translateY(-1px);
        }

        /* Related Articles */
        .related-section {
            padding: 48px 0 56px;
            background: var(--bg-white);
            border-top: 1px solid var(--border);
        }
        .related-section .section-title {
            font-size: 1.4rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 32px;
            color: var(--text);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .related-card {
            background: var(--bg);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid transparent;
        }
        .related-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--border);
            background: var(--bg-white);
        }
        .related-card-img {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--border-light);
        }
        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }
        .related-card:hover .related-card-img img {
            transform: scale(1.04);
        }
        .related-card-body {
            padding: 18px 20px 20px;
        }
        .related-card-tag {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 8px;
            display: inline-block;
        }
        .related-card-title {
            font-size: 1rem;
            font-weight: 600;
            line-height: 1.45;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card-title:hover {
            color: var(--primary);
        }
        .related-card-date {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-top: 10px;
        }

        /* CTA Section */
        .cta-section {
            padding: 56px 0;
            background: linear-gradient(135deg, var(--primary) 0%, #6B83F9 100%);
            color: #fff;
            text-align: center;
        }
        .cta-section .cta-title {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-section .cta-desc {
            font-size: 1rem;
            opacity: 0.9;
            margin-bottom: 28px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-cta-white {
            display: inline-block;
            padding: 13px 32px;
            border-radius: 28px;
            font-weight: 600;
            font-size: 1rem;
            background: #fff;
            color: var(--primary);
            transition: all var(--transition);
        }
        .btn-cta-white:hover {
            box-shadow: 0 8px 24px rgba(0,0,0,0.18);
            transform: translateY(-2px);
        }

        /* Footer */
        .site-footer {
            background: #1a1a2e;
            color: #cbd5e1;
            padding: 36px 0 28px;
        }
        .footer-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 16px;
        }
        .footer-brand {
            font-weight: 700;
            font-size: 1.05rem;
            color: #fff;
        }
        .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .footer-links a {
            color: #cbd5e1;
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-links a:hover { color: #fff; }
        .footer-copy {
            font-size: 0.82rem;
            color: #94a3b8;
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 16px;
            text-align: center;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-title { font-size: 1.7rem; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .nav-search input { width: 100px; }
        }

        @media (max-width: 768px) {
            .article-title { font-size: 1.45rem; }
            .article-content { font-size: 1rem; }
            .article-content h2 { font-size: 1.3rem; }
            .article-content h3 { font-size: 1.12rem; }
            .related-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
            .related-card-body { padding: 14px 16px 16px; }
            .related-card-title { font-size: 0.92rem; }
            .cta-section .cta-title { font-size: 1.35rem; }
            .nav-links { display: none; }
            .nav-search { display: none; }
            .btn-nav-cta { display: none; }
            .hamburger { display: flex; }
            .nav-links.mobile-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: var(--bg-white);
                border-bottom: 1px solid var(--border);
                padding: 12px 20px;
                gap: 4px;
                box-shadow: var(--shadow-lg);
                z-index: 999;
            }
            .nav-links.mobile-open a {
                padding: 12px 16px;
                border-radius: var(--radius);
                width: 100%;
            }
        }

        @media (max-width: 520px) {
            .article-title { font-size: 1.3rem; }
            .article-header-section { padding: 32px 0 20px; }
            .article-meta { gap: 10px; font-size: 0.82rem; }
            .article-featured-image { border-radius: var(--radius); margin-bottom: 20px; }
            .related-grid { grid-template-columns: 1fr; }
            .cta-section { padding: 40px 0; }
            .footer-inner { flex-direction: column; text-align: center; }
            .footer-links { justify-content: center; }
            .article-content blockquote { padding: 12px 16px; }
        }