/* roulang page: index */
:root {
            --primary: #1e40af;
            --primary-light: #3b82f6;
            --accent: #f59e0b;
            --bg-body: #ffffff;
            --text-body: #1e293b;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --radius: 0.75rem;
            --radius-lg: 1rem;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 24px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --transition: all 0.25s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        button {
            cursor: pointer;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 12px;
            }
        }
        .section {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
        }
        @media (max-width: 520px) {
            .section {
                padding: 40px 0;
            }
        }
        .section-title {
            font-size: 2.25rem;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-body);
            margin-bottom: 0.75rem;
        }
        .section-subtitle {
            font-size: 1.125rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 3rem auto;
            text-align: center;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.75rem;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 2rem;
            }
        }
        @media (max-width: 520px) {
            .section-title {
                font-size: 1.5rem;
            }
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: #1e3a8a;
            border-color: #1e3a8a;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(30, 64, 175, 0.30);
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(30, 64, 175, 0.20);
        }
        .btn-outline:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }
        .btn-accent {
            background: var(--accent);
            color: #1e293b;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: #d97706;
            border-color: #d97706;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.30);
        }
        .card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 9999px;
            font-size: 0.8125rem;
            font-weight: 500;
            background: var(--primary-50, #eff6ff);
            color: var(--primary);
            border: 1px solid var(--primary-200, #bfdbfe);
        }
        .badge-accent {
            background: #fffbeb;
            color: #b45309;
            border-color: #fde68a;
        }
        .badge-green {
            background: #f0fdf4;
            color: #166534;
            border-color: #bbf7d0;
        }
        .tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--neutral-100);
            color: var(--text-muted);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .tag:hover {
            background: var(--primary-50);
            color: var(--primary);
            border-color: var(--primary-200);
        }
        .stat-number {
            font-size: 2.75rem;
            font-weight: 800;
            line-height: 1.1;
            color: var(--primary);
        }
        .stat-label {
            font-size: 0.9375rem;
            color: var(--text-muted);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .stat-number {
                font-size: 2rem;
            }
        }
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 20px 0;
        }
        .faq-item:first-child {
            padding-top: 0;
        }
        .faq-question {
            font-weight: 600;
            font-size: 1.0625rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            padding: 4px 0;
            color: var(--text-body);
        }
        .faq-question i {
            color: var(--text-muted);
            transition: var(--transition);
            font-size: 0.875rem;
        }
        .faq-question:hover i {
            color: var(--primary);
        }
        .faq-answer {
            color: var(--text-muted);
            font-size: 0.9375rem;
            line-height: 1.75;
            padding-top: 10px;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .gradient-hero {
            background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #1e40af 100%);
        }
        .gradient-cta {
            background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
        }
        .text-gradient {
            background: linear-gradient(135deg, #f59e0b, #fbbf24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-link {
            position: relative;
            font-weight: 500;
            padding: 6px 0;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: var(--transition);
            border-radius: 2px;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--primary);
        }
        .nav-link.active::after {
            width: 100%;
        }
        #mobile-menu {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        #mobile-menu.open {
            max-height: 500px;
        }
        .mobile-nav-link {
            display: block;
            padding: 12px 20px;
            font-weight: 500;
            color: var(--text-muted);
            border-left: 3px solid transparent;
            transition: var(--transition);
        }
        .mobile-nav-link:hover,
        .mobile-nav-link.active {
            color: var(--primary);
            background: var(--primary-50);
            border-left-color: var(--primary);
        }
        .list-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .list-item:last-child {
            border-bottom: none;
        }
        .list-item:hover {
            padding-left: 8px;
        }
        .list-item .icon-circle {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-50);
            color: var(--primary);
            font-size: 1rem;
        }
        .process-step {
            text-align: center;
            padding: 24px 16px;
        }
        .process-step .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            background: var(--primary);
            margin: 0 auto 16px auto;
            box-shadow: 0 8px 24px rgba(30, 64, 175, 0.20);
        }
        .process-step .step-title {
            font-weight: 600;
            font-size: 1.0625rem;
            margin-bottom: 6px;
        }
        .process-step .step-desc {
            font-size: 0.875rem;
            color: var(--text-muted);
        }
        @media (max-width: 768px) {
            .process-step .step-number {
                width: 48px;
                height: 48px;
                font-size: 1.25rem;
            }
        }
        .footer-link {
            color: var(--neutral-400);
            transition: var(--transition);
            font-size: 0.9375rem;
        }
        .footer-link:hover {
            color: #fff;
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            margin-top: 40px;
            text-align: center;
            color: var(--neutral-500);
            font-size: 0.875rem;
        }
        .hero-search {
            display: flex;
            max-width: 520px;
            margin: 0 auto;
            background: #fff;
            border-radius: 9999px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
            overflow: hidden;
        }
        .hero-search input {
            flex: 1;
            padding: 16px 24px;
            font-size: 1rem;
            border: none;
            outline: none;
            background: transparent;
            color: var(--text-body);
        }
        .hero-search input::placeholder {
            color: var(--text-muted);
        }
        .hero-search button {
            padding: 16px 28px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .hero-search button:hover {
            background: #1e3a8a;
        }
        @media (max-width: 520px) {
            .hero-search {
                flex-direction: column;
                border-radius: var(--radius);
            }
            .hero-search input {
                padding: 14px 18px;
                text-align: center;
            }
            .hero-search button {
                padding: 14px 18px;
                width: 100%;
            }
        }
        .grid-auto {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        @media (max-width: 520px) {
            .grid-auto {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }
        .img-cover {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .focus-ring:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .cms-list-empty {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
            background: var(--neutral-50);
            border-radius: var(--radius-lg);
            border: 2px dashed var(--border-color);
        }
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
        }
        @media (max-width: 520px) {
            .category-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
        }
        .category-card {
            padding: 28px 20px;
            text-align: center;
            border-radius: var(--radius-lg);
            background: #fff;
            border: 2px solid var(--border-color);
            transition: var(--transition);
            cursor: pointer;
        }
        .category-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .category-card .icon {
            font-size: 2rem;
            margin-bottom: 12px;
            color: var(--primary);
        }
        .category-card .cat-title {
            font-weight: 600;
            font-size: 1.0625rem;
        }
        .category-card .cat-count {
            font-size: 0.8125rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

/* roulang page: article */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --neutral-50: #f8fafc;
            --neutral-100: #f1f5f9;
            --neutral-200: #e2e8f0;
            --neutral-300: #cbd5e1;
            --neutral-400: #94a3b8;
            --neutral-500: #64748b;
            --neutral-600: #475569;
            --neutral-700: #334155;
            --neutral-800: #1e293b;
            --neutral-900: #0f172a;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
            --transition: 0.25s ease;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body { font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif; line-height: 1.6; color: var(--neutral-800); background: #fff; -webkit-font-smoothing: antialiased; }
        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        /* 导航 */
        .header-scroll { transition: background var(--transition), box-shadow var(--transition); }
        .header-scroll.scrolled { background: rgba(255,255,255,0.96); box-shadow: 0 2px 20px rgba(0,0,0,0.08); backdrop-filter: blur(12px); }
        .nav-link { position: relative; font-size: 0.95rem; font-weight: 500; color: var(--neutral-600); padding: 8px 0; transition: color var(--transition); }
        .nav-link:hover { color: var(--primary); }
        .nav-link.active { color: var(--primary); }
        .nav-link.active::after { content: ''; position: absolute; bottom: -2px; left: 0; right: 0; height: 2.5px; background: var(--primary); border-radius: 4px; }
        .search-input { border: 1.5px solid var(--neutral-200); border-radius: 100px; padding: 10px 20px; font-size: 0.9rem; background: var(--neutral-50); transition: border var(--transition), box-shadow var(--transition); width: 220px; }
        .search-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.15); }
        .btn-primary { display: inline-flex; align-items: center; gap: 8px; background: var(--primary); color: #fff; padding: 10px 28px; border-radius: 100px; font-weight: 600; font-size: 0.95rem; border: none; cursor: pointer; transition: background var(--transition), transform var(--transition), box-shadow var(--transition); }
        .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,0.3); }
        .btn-primary:active { transform: translateY(0); }
        .btn-outline { display: inline-flex; align-items: center; gap: 8px; background: transparent; color: var(--primary); padding: 10px 28px; border-radius: 100px; font-weight: 600; font-size: 0.95rem; border: 1.5px solid var(--primary); cursor: pointer; transition: background var(--transition), color var(--transition), transform var(--transition); }
        .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .badge { display: inline-block; padding: 4px 14px; border-radius: 100px; font-size: 0.8rem; font-weight: 500; background: var(--primary-light); color: var(--primary); }
        .badge-accent { background: #fef3c7; color: #b45309; }
        .badge-green { background: #d1fae5; color: #065f46; }
        .card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-sm); border: 1px solid var(--neutral-100); transition: transform var(--transition), box-shadow var(--transition); overflow: hidden; }
        .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .footer-link { color: var(--neutral-400); font-size: 0.9rem; transition: color var(--transition); }
        .footer-link:hover { color: #fff; }
        /* 文章内容样式 */
        .article-body h2 { font-size: 1.6rem; font-weight: 700; margin: 32px 0 16px; color: var(--neutral-900); line-height: 1.35; }
        .article-body h3 { font-size: 1.25rem; font-weight: 600; margin: 24px 0 12px; color: var(--neutral-800); }
        .article-body p { font-size: 1.05rem; line-height: 1.8; color: var(--neutral-700); margin-bottom: 16px; }
        .article-body ul, .article-body ol { margin: 12px 0 20px; padding-left: 24px; }
        .article-body li { font-size: 1.05rem; line-height: 1.8; color: var(--neutral-700); margin-bottom: 6px; }
        .article-body blockquote { border-left: 4px solid var(--primary); background: var(--neutral-50); padding: 16px 24px; margin: 20px 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
        .article-body blockquote p { margin-bottom: 0; font-style: italic; color: var(--neutral-600); }
        .article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
        .article-body a:hover { color: var(--primary-dark); }
        .article-body img { border-radius: var(--radius-sm); margin: 20px 0; }
        .article-body pre { background: var(--neutral-900); color: #e2e8f0; padding: 20px 24px; border-radius: var(--radius-sm); overflow-x: auto; margin: 20px 0; font-size: 0.9rem; line-height: 1.6; }
        .article-body code { font-family: 'JetBrains Mono', 'Fira Code', monospace; font-size: 0.9em; }
        .article-body p code { background: var(--neutral-100); padding: 2px 8px; border-radius: 4px; }
        /* 移动端菜单 */
        .mobile-menu { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 50; opacity: 0; visibility: hidden; transition: opacity 0.3s, visibility 0.3s; }
        .mobile-menu.open { opacity: 1; visibility: visible; }
        .mobile-menu-panel { position: absolute; top: 0; right: 0; width: 280px; height: 100%; background: #fff; padding: 24px; transform: translateX(100%); transition: transform 0.3s; }
        .mobile-menu.open .mobile-menu-panel { transform: translateX(0); }
        /* 响应式 */
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
            .search-input { width: 140px; }
            .article-body h2 { font-size: 1.35rem; }
            .article-body p { font-size: 1rem; }
        }
        @media (max-width: 520px) {
            .search-input { width: 100px; }
            .btn-primary { padding: 8px 18px; font-size: 0.85rem; }
        }

/* roulang page: category1 */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --neutral-50: #f8fafc;
            --neutral-100: #f1f5f9;
            --neutral-200: #e2e8f0;
            --neutral-300: #cbd5e1;
            --neutral-400: #94a3b8;
            --neutral-500: #64748b;
            --neutral-600: #475569;
            --neutral-700: #334155;
            --neutral-800: #1e293b;
            --neutral-900: #0f172a;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --transition: all 0.3s 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; }
        body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif; background: var(--neutral-50); color: var(--neutral-800); line-height: 1.6; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        @media (max-width: 640px) { .container { padding: 0 16px; } }

        /* Header & Nav */
        .site-header { background: #fff; border-bottom: 1px solid var(--neutral-200); position: sticky; top: 0; z-index: 100; backdrop-filter: blur(12px); background: rgba(255,255,255,0.96); }
        .nav-link { position: relative; font-weight: 500; font-size: 0.95rem; color: var(--neutral-600); padding: 0.5rem 0.25rem; transition: var(--transition); letter-spacing: 0.01em; }
        .nav-link::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2.5px; background: var(--primary); border-radius: 4px; transition: var(--transition); }
        .nav-link:hover { color: var(--primary); }
        .nav-link:hover::after { width: 100%; }
        .nav-link.active { color: var(--primary); font-weight: 600; }
        .nav-link.active::after { width: 100%; }
        .search-input { border: 1.5px solid var(--neutral-200); border-radius: 50px; padding: 0.55rem 1.2rem 0.55rem 2.6rem; font-size: 0.9rem; background: var(--neutral-50); transition: var(--transition); width: 220px; }
        .search-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(37,99,235,0.12); width: 260px; }
        .search-icon { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--neutral-400); pointer-events: none; font-size: 0.9rem; }
        .btn-primary { display: inline-flex; align-items: center; gap: 0.5rem; background: var(--primary); color: #fff; font-weight: 600; font-size: 0.95rem; padding: 0.65rem 1.8rem; border-radius: 50px; border: none; cursor: pointer; transition: var(--transition); box-shadow: 0 4px 14px rgba(37,99,235,0.3); }
        .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,0.35); }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(37,99,235,0.25); }
        .btn-outline { display: inline-flex; align-items: center; gap: 0.5rem; border: 1.5px solid var(--primary); color: var(--primary); font-weight: 600; font-size: 0.95rem; padding: 0.6rem 1.6rem; border-radius: 50px; background: transparent; cursor: pointer; transition: var(--transition); }
        .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(37,99,235,0.2); }
        .btn-accent { display: inline-flex; align-items: center; gap: 0.5rem; background: var(--accent); color: #fff; font-weight: 600; font-size: 0.95rem; padding: 0.65rem 1.8rem; border-radius: 50px; border: none; cursor: pointer; transition: var(--transition); box-shadow: 0 4px 14px rgba(245,158,11,0.3); }
        .btn-accent:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(245,158,11,0.35); }

        /* Mobile nav */
        .mobile-menu-btn { display: none; background: none; border: none; font-size: 1.5rem; color: var(--neutral-700); cursor: pointer; padding: 0.25rem; }
        @media (max-width: 768px) {
            .mobile-menu-btn { display: flex; align-items: center; justify-content: center; }
            .desktop-nav { display: none !important; }
            .desktop-cta { display: none !important; }
            .mobile-nav-open { display: flex !important; flex-direction: column; gap: 0.5rem; padding: 1rem 0 1.2rem; }
            .mobile-nav-open .nav-link { padding: 0.6rem 0; }
            .search-input { width: 100%; }
            .search-input:focus { width: 100%; }
        }
        @media (min-width: 769px) {
            .mobile-nav { display: none !important; }
        }

        /* Hero */
        .hero-section { background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%); position: relative; overflow: hidden; }
        .hero-section::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 20% 50%, rgba(37,99,235,0.15) 0%, transparent 60%), radial-gradient(ellipse at 80% 50%, rgba(245,158,11,0.08) 0%, transparent 60%); pointer-events: none; }
        .hero-grid-dots { position: absolute; inset: 0; background-image: radial-gradient(rgba(255,255,255,0.06) 1px, transparent 1px); background-size: 28px 28px; pointer-events: none; }

        /* Cards */
        .topic-card { background: #fff; border-radius: var(--radius); padding: 1.75rem; box-shadow: var(--shadow-sm); border: 1px solid var(--neutral-200); transition: var(--transition); }
        .topic-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
        .topic-card .icon-wrap { width: 52px; height: 52px; border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; color: #fff; }
        .article-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--neutral-200); transition: var(--transition); }
        .article-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
        .article-card .card-img { height: 180px; background: var(--neutral-200); display: flex; align-items: center; justify-content: center; font-size: 2.5rem; color: var(--neutral-400); position: relative; overflow: hidden; }
        .article-card .card-img img { width: 100%; height: 100%; object-fit: cover; }
        .article-card .card-img .tag { position: absolute; top: 12px; left: 12px; background: var(--primary); color: #fff; font-size: 0.7rem; font-weight: 600; padding: 0.2rem 0.8rem; border-radius: 50px; }
        .stat-card { background: #fff; border-radius: var(--radius); padding: 1.5rem 1.8rem; text-align: center; box-shadow: var(--shadow-sm); border: 1px solid var(--neutral-200); transition: var(--transition); }
        .stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
        .stat-card .number { font-size: 2.4rem; font-weight: 800; color: var(--primary); line-height: 1.2; }
        .stat-card .label { font-size: 0.9rem; color: var(--neutral-500); margin-top: 0.3rem; }

        /* Steps */
        .step-item { display: flex; gap: 1.2rem; align-items: flex-start; }
        .step-number { width: 40px; height: 40px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 1rem; flex-shrink: 0; margin-top: 0.15rem; }

        /* FAQ */
        .faq-item { border-bottom: 1px solid var(--neutral-200); padding: 1.2rem 0; }
        .faq-item:last-child { border-bottom: none; }
        .faq-question { font-weight: 600; font-size: 1.05rem; cursor: pointer; display: flex; justify-content: space-between; align-items: center; color: var(--neutral-800); transition: var(--transition); }
        .faq-question:hover { color: var(--primary); }
        .faq-question .icon { font-size: 1rem; color: var(--neutral-400); transition: var(--transition); }
        .faq-answer { margin-top: 0.6rem; color: var(--neutral-600); font-size: 0.95rem; line-height: 1.7; display: none; }
        .faq-item.active .faq-answer { display: block; }
        .faq-item.active .faq-question .icon { transform: rotate(45deg); color: var(--primary); }

        /* Tags */
        .tag { display: inline-block; padding: 0.3rem 1rem; border-radius: 50px; font-size: 0.8rem; font-weight: 500; background: var(--neutral-100); color: var(--neutral-600); border: 1px solid var(--neutral-200); transition: var(--transition); cursor: pointer; }
        .tag:hover { background: var(--primary-bg); color: var(--primary); border-color: var(--primary-light); }
        .tag-primary { background: var(--primary-bg); color: var(--primary); border-color: var(--primary-light); }
        .tag-primary:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

        /* Footer */
        .footer-link { color: var(--neutral-400); font-size: 0.9rem; transition: var(--transition); position: relative; }
        .footer-link:hover { color: #fff; }
        .footer-link::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 1px; background: var(--primary-light); transition: var(--transition); }
        .footer-link:hover::after { width: 100%; }

        /* Section spacing */
        .section-padding { padding: 4.5rem 0; }
        @media (max-width: 640px) { .section-padding { padding: 3rem 0; } }
        .section-title { font-size: 2rem; font-weight: 800; color: var(--neutral-900); letter-spacing: -0.02em; }
        .section-subtitle { font-size: 1.05rem; color: var(--neutral-500); margin-top: 0.5rem; max-width: 600px; }
        @media (max-width: 640px) { .section-title { font-size: 1.6rem; } }

        /* CTA */
        .cta-section { background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%); position: relative; overflow: hidden; }
        .cta-section::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 30% 50%, rgba(37,99,235,0.12) 0%, transparent 60%), radial-gradient(ellipse at 70% 50%, rgba(245,158,11,0.06) 0%, transparent 60%); pointer-events: none; }

        /* Breadcrumb */
        .breadcrumb { display: flex; align-items: center; gap: 0.5rem; font-size: 0.85rem; color: var(--neutral-400); flex-wrap: wrap; }
        .breadcrumb a { color: var(--neutral-400); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb .sep { color: var(--neutral-300); }

        /* Responsive grid helpers */
        .grid-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; }
        .grid-articles { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 1.5rem; }
        .grid-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1.2rem; }
        @media (max-width: 640px) { .grid-cards { grid-template-columns: 1fr; } .grid-articles { grid-template-columns: 1fr; } .grid-stats { grid-template-columns: repeat(2, 1fr); } }

        /* Badge */
        .badge { display: inline-flex; align-items: center; gap: 0.35rem; padding: 0.25rem 0.9rem; border-radius: 50px; font-size: 0.75rem; font-weight: 600; }
        .badge-blue { background: var(--primary-bg); color: var(--primary); }
        .badge-amber { background: #fef3c7; color: #b45309; }
        .badge-green { background: #d1fae5; color: #065f46; }

        /* Misc */
        .divider { height: 1px; background: var(--neutral-200); margin: 0; }
        .focus-ring:focus { outline: none; box-shadow: 0 0 0 4px rgba(37,99,235,0.15); }
        .text-gradient { background: linear-gradient(135deg, var(--primary), #8b5cf6); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

        /* Skeleton shimmer for demo images */
        .shimmer { background: linear-gradient(90deg, var(--neutral-200) 25%, var(--neutral-100) 50%, var(--neutral-200) 75%); background-size: 200% 100%; animation: shimmer 1.8s infinite; }
        @keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }