/* roulang page: index */
:root {
            --brand-500: #3b82f6;
            --brand-600: #2563eb;
            --brand-700: #1d4ed8;
            --accent-400: #facc15;
            --accent-500: #eab308;
            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --bg-base: #ffffff;
            --bg-soft: #f8fafc;
            --bg-card: #ffffff;
            --border-light: #e2e8f0;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.06), 0 2px 8px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
            --transition-base: all 0.25s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-base);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea {
            font-family: inherit;
            transition: var(--transition-base);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }
        /* header / nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
        }
        .nav-link {
            position: relative;
            padding: 8px 4px;
            font-weight: 500;
            color: var(--text-secondary);
            letter-spacing: 0.01em;
            transition: var(--transition-base);
        }
        .nav-link:hover {
            color: var(--brand-600);
        }
        .nav-link.active {
            color: var(--brand-700);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--brand-500);
            border-radius: 2px;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            background: var(--brand-600);
            color: #fff;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition-base);
        }
        .nav-cta:hover {
            background: var(--brand-700);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(37,99,235,0.3);
        }
        /* hero */
        .hero-section {
            position: relative;
            min-height: 80vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 60%, #1d4ed8 100%);
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .hero-glow {
            position: absolute;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(59,130,246,0.25) 0%, transparent 70%);
            top: -10%;
            right: -5%;
            pointer-events: none;
        }
        .hero-glow-2 {
            position: absolute;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(250,204,21,0.12) 0%, transparent 70%);
            bottom: 0;
            left: 10%;
            pointer-events: none;
        }
        /* card */
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            transition: var(--transition-base);
            box-shadow: var(--shadow-sm);
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .stat-card {
            background: rgba(255,255,255,0.06);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,0.10);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            transition: var(--transition-base);
        }
        .stat-card:hover {
            background: rgba(255,255,255,0.10);
            transform: translateY(-2px);
        }
        .guide-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-base);
            box-shadow: var(--shadow-sm);
        }
        .guide-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .guide-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: var(--transition-base);
        }
        .guide-card:hover img {
            transform: scale(1.03);
        }
        /* cms card */
        .cms-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: var(--transition-base);
            box-shadow: var(--shadow-sm);
        }
        .cms-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            border-color: var(--brand-200);
        }
        .cms-card .tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
            background: var(--brand-50);
            color: var(--brand-700);
            letter-spacing: 0.02em;
        }
        /* faq */
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 20px 0;
        }
        .faq-item summary {
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-primary);
            transition: var(--transition-base);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary .icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--brand-100);
            color: var(--brand-600);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            transition: var(--transition-base);
        }
        .faq-item[open] summary .icon {
            background: var(--brand-600);
            color: #fff;
        }
        .faq-item .answer {
            padding: 16px 0 8px 40px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        /* cta */
        .cta-section {
            background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        /* footer */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
        }
        .site-footer a {
            color: #94a3b8;
        }
        .site-footer a:hover {
            color: #f1f5f9;
        }
        .footer-divider {
            border-color: rgba(255,255,255,0.06);
        }
        /* mobile nav */
        .mobile-nav {
            display: none;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            padding: 12px 24px;
        }
        .mobile-nav.open {
            display: block;
        }
        .mobile-nav a {
            display: block;
            padding: 12px 0;
            font-weight: 500;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-light);
        }
        .mobile-nav a:last-child {
            border-bottom: none;
        }
        .mobile-nav a.active {
            color: var(--brand-700);
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none !important;
            }
            .mobile-toggle {
                display: flex !important;
            }
            .hero-section {
                min-height: 70vh;
            }
        }
        @media (min-width: 769px) {
            .mobile-toggle {
                display: none !important;
            }
            .mobile-nav {
                display: none !important;
            }
        }
        /* extra utilities */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--brand-600);
            color: #fff;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition-base);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            background: var(--brand-700);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37,99,235,0.3);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255,255,255,0.3);
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition-base);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.08);
            border-color: rgba(255,255,255,0.6);
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .section-sub {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 640px;
        }
        @media (max-width: 640px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-sub {
                font-size: 0.95rem;
            }
        }
        .grid-gap {
            gap: 24px;
        }
        @media (max-width: 640px) {
            .grid-gap {
                gap: 16px;
            }
        }
        /* 分类入口卡片图片统一 */
        .category-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        @media (max-width: 640px) {
            .category-img {
                height: 160px;
            }
        }

/* roulang page: article */
:root {
            --brand-50: #eff6ff; --brand-100: #dbeafe; --brand-200: #bfdbfe; --brand-300: #93c5fd;
            --brand-400: #60a5fa; --brand-500: #3b82f6; --brand-600: #2563eb; --brand-700: #1d4ed8;
            --brand-800: #1e40af; --brand-900: #1e3a8a;
            --accent-500: #d946ef; --accent-600: #c026d3;
            --text-primary: #1e293b; --text-secondary: #475569; --text-muted: #94a3b8;
            --bg-body: #ffffff; --bg-section: #f8fafc; --bg-dark: #0f172a;
            --border-light: #e2e8f0; --shadow-sm: 0 1px 3px rgba(0,0,0,0.06); --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 10px 40px rgba(0,0,0,0.12); --radius: 12px; --radius-lg: 20px;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body { font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif; color: var(--text-primary); background: var(--bg-body); line-height: 1.6; -webkit-font-smoothing: antialiased; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        a { color: inherit; text-decoration: none; transition: color 0.2s, opacity 0.2s; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius); }
        .site-header { background: rgba(255,255,255,0.95); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border-light); position: sticky; top: 0; z-index: 50; }
        .site-header .container { display: flex; align-items: center; justify-content: space-between; height: 64px; }
        .desktop-nav { display: flex; align-items: center; gap: 32px; }
        .desktop-nav .nav-link { font-size: 0.95rem; font-weight: 500; color: var(--text-secondary); padding: 6px 0; position: relative; transition: color 0.2s; }
        .desktop-nav .nav-link::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--brand-600); border-radius: 2px; transition: width 0.25s ease; }
        .desktop-nav .nav-link:hover { color: var(--brand-700); }
        .desktop-nav .nav-link:hover::after { width: 100%; }
        .desktop-nav .nav-link.active { color: var(--brand-700); }
        .desktop-nav .nav-link.active::after { width: 100%; }
        .desktop-nav .nav-cta { display: inline-flex; align-items: center; gap: 6px; background: var(--brand-600); color: #fff; padding: 8px 20px; border-radius: 40px; font-size: 0.9rem; font-weight: 600; transition: background 0.2s, transform 0.2s, box-shadow 0.2s; }
        .desktop-nav .nav-cta:hover { background: var(--brand-700); transform: translateY(-1px); box-shadow: 0 4px 15px rgba(37,99,235,0.35); }
        .mobile-toggle { display: none; background: none; border: none; cursor: pointer; }
        .mobile-nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border-light); padding: 16px 24px; flex-direction: column; gap: 12px; box-shadow: var(--shadow-md); }
        .mobile-nav.open { display: flex; }
        .mobile-nav a { padding: 10px 0; font-size: 1rem; font-weight: 500; color: var(--text-secondary); border-bottom: 1px solid #f1f5f9; transition: color 0.2s; }
        .mobile-nav a:last-child { border-bottom: none; }
        .mobile-nav a:hover { color: var(--brand-700); }
        .mobile-nav a.active { color: var(--brand-700); font-weight: 600; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-toggle { display: flex; }
            .container { padding: 0 16px; }
        }
        .page-banner { position: relative; padding: 60px 0 48px; background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #312e81 100%); overflow: hidden; }
        .page-banner::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center/cover no-repeat; opacity: 0.15; mix-blend-mode: overlay; }
        .page-banner .container { position: relative; z-index: 2; }
        .page-banner h1 { font-size: 2rem; font-weight: 800; color: #fff; line-height: 1.3; max-width: 800px; }
        .page-banner .breadcrumb { display: flex; align-items: center; gap: 8px; margin-bottom: 16px; font-size: 0.9rem; color: rgba(255,255,255,0.7); }
        .page-banner .breadcrumb a { color: rgba(255,255,255,0.7); transition: color 0.2s; }
        .page-banner .breadcrumb a:hover { color: #fff; }
        .page-banner .breadcrumb span { color: rgba(255,255,255,0.9); }
        .article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: 16px; color: rgba(255,255,255,0.75); font-size: 0.9rem; }
        .article-meta .badge { display: inline-block; background: rgba(255,255,255,0.15); backdrop-filter: blur(4px); padding: 4px 14px; border-radius: 40px; font-size: 0.8rem; font-weight: 500; color: #fff; }
        .article-body { padding: 48px 0 64px; }
        .article-content { max-width: 820px; margin: 0 auto; }
        .article-content .featured-image { width: 100%; border-radius: var(--radius-lg); margin-bottom: 32px; box-shadow: var(--shadow-md); }
        .article-content .content-text { font-size: 1.05rem; line-height: 1.85; color: var(--text-primary); }
        .article-content .content-text h2 { font-size: 1.6rem; font-weight: 700; margin: 36px 0 16px; color: var(--brand-900); }
        .article-content .content-text h3 { font-size: 1.25rem; font-weight: 600; margin: 28px 0 12px; color: var(--text-primary); }
        .article-content .content-text p { margin-bottom: 18px; }
        .article-content .content-text ul, .article-content .content-text ol { margin: 16px 0 20px; padding-left: 24px; }
        .article-content .content-text li { margin-bottom: 8px; }
        .article-content .content-text a { color: var(--brand-600); text-decoration: underline; text-underline-offset: 2px; }
        .article-content .content-text a:hover { color: var(--brand-800); }
        .article-content .content-text blockquote { border-left: 4px solid var(--brand-400); background: var(--brand-50); padding: 16px 20px; margin: 24px 0; border-radius: 0 var(--radius) var(--radius) 0; color: var(--text-secondary); font-style: italic; }
        .article-content .content-text img { border-radius: var(--radius); margin: 24px 0; box-shadow: var(--shadow-sm); }
        .article-content .content-text code { background: #f1f5f9; padding: 2px 8px; border-radius: 4px; font-size: 0.9em; }
        .article-footer-bar { border-top: 1px solid var(--border-light); margin-top: 40px; padding-top: 24px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 16px; }
        .article-footer-bar .tags { display: flex; flex-wrap: wrap; gap: 8px; }
        .article-footer-bar .tags span { background: var(--brand-50); color: var(--brand-700); padding: 4px 14px; border-radius: 40px; font-size: 0.8rem; font-weight: 500; }
        .article-footer-bar .share { display: flex; align-items: center; gap: 12px; color: var(--text-muted); font-size: 0.9rem; }
        .article-footer-bar .share a { display: flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 50%; background: #f1f5f9; color: var(--text-secondary); transition: background 0.2s, color 0.2s; }
        .article-footer-bar .share a:hover { background: var(--brand-600); color: #fff; }
        .not-found { text-align: center; padding: 80px 20px; }
        .not-found .icon { font-size: 4rem; color: var(--text-muted); margin-bottom: 20px; }
        .not-found h2 { font-size: 1.8rem; font-weight: 700; color: var(--text-primary); margin-bottom: 12px; }
        .not-found p { color: var(--text-secondary); margin-bottom: 24px; }
        .not-found .btn-back { display: inline-flex; align-items: center; gap: 8px; background: var(--brand-600); color: #fff; padding: 12px 28px; border-radius: 40px; font-weight: 600; transition: background 0.2s, transform 0.2s; }
        .not-found .btn-back:hover { background: var(--brand-700); transform: translateY(-2px); }
        .related-section { background: var(--bg-section); padding: 48px 0; }
        .related-section h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 28px; color: var(--text-primary); }
        .related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
        .related-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); transition: box-shadow 0.3s, transform 0.3s; border: 1px solid var(--border-light); }
        .related-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .related-card img { width: 100%; height: 180px; object-fit: cover; border-radius: 0; }
        .related-card .card-body { padding: 20px; }
        .related-card .card-body h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; line-height: 1.4; color: var(--text-primary); }
        .related-card .card-body h3 a:hover { color: var(--brand-600); }
        .related-card .card-body .meta { font-size: 0.8rem; color: var(--text-muted); display: flex; align-items: center; gap: 12px; }
        .site-footer { background: var(--bg-dark); color: #94a3b8; }
        .site-footer .footer-divider { border: none; border-top: 1px solid rgba(255,255,255,0.08); }
        .site-footer a { transition: color 0.2s; }
        .site-footer h4 { letter-spacing: 0.3px; }
        @media (max-width: 640px) {
            .page-banner h1 { font-size: 1.4rem; }
            .article-content .content-text { font-size: 0.98rem; }
            .article-meta { flex-direction: column; align-items: flex-start; gap: 8px; }
            .article-footer-bar { flex-direction: column; align-items: flex-start; }
            .related-grid { grid-template-columns: 1fr; }
        }

/* roulang page: category1 */
:root {
            --brand-50: #eef2ff;
            --brand-100: #e0e7ff;
            --brand-200: #c7d2fe;
            --brand-300: #a5b4fc;
            --brand-400: #818cf8;
            --brand-500: #6366f1;
            --brand-600: #4f46e5;
            --brand-700: #4338ca;
            --brand-800: #3730a3;
            --brand-900: #312e81;
            --accent-500: #d946ef;
            --text-dark: #1e1b4b;
            --text-muted: #6b7280;
            --bg-light: #f8fafc;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-card: 0 4px 20px rgba(79, 70, 229, 0.08);
            --shadow-hover: 0 12px 40px rgba(79, 70, 229, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: 'Inter', system-ui, -apple-system, sans-serif;
            background: #ffffff;
            color: var(--text-dark);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input,
        textarea {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        @media (min-width: 768px) {
            .container {
                padding: 0 2rem;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(79, 70, 229, 0.06);
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
        }

        .nav-link {
            position: relative;
            font-size: 0.95rem;
            font-weight: 500;
            color: #4b5563;
            padding: 0.5rem 0;
            transition: var(--transition);
            letter-spacing: 0.01em;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0%;
            height: 2.5px;
            background: var(--brand-600);
            border-radius: 4px;
            transition: var(--transition);
        }

        .nav-link:hover {
            color: var(--brand-700);
        }

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

        .nav-link.active {
            color: var(--brand-700);
            font-weight: 600;
        }

        .nav-link.active::after {
            width: 100%;
            background: var(--brand-600);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.4rem;
            background: var(--brand-600);
            color: #fff;
            border-radius: 9999px;
            font-size: 0.9rem;
            font-weight: 600;
            transition: var(--transition);
            letter-spacing: 0.01em;
        }

        .nav-cta:hover {
            background: var(--brand-700);
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.3);
        }

        .nav-cta i {
            transition: transform 0.3s ease;
        }

        .nav-cta:hover i {
            transform: translateX(4px);
        }

        /* 移动端导航 */
        .mobile-nav {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 1.5rem 2rem;
            border-bottom: 1px solid rgba(79, 70, 229, 0.08);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
            flex-direction: column;
            gap: 0.75rem;
        }

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

        .mobile-nav a {
            padding: 0.75rem 0;
            font-size: 1.05rem;
            font-weight: 500;
            color: #374151;
            border-bottom: 1px solid rgba(0, 0, 0, 0.04);
            transition: var(--transition);
        }

        .mobile-nav a:last-child {
            border-bottom: none;
        }

        .mobile-nav a:hover {
            color: var(--brand-700);
            padding-left: 0.5rem;
        }

        .mobile-nav a.active {
            color: var(--brand-700);
            font-weight: 600;
        }

        .mobile-toggle {
            transition: var(--transition);
            border: none;
            background: none;
        }

        .mobile-toggle:focus-visible {
            outline: 2px solid var(--brand-500);
            outline-offset: 2px;
        }

        @media (min-width: 768px) {
            .desktop-nav {
                display: flex !important;
            }
            .mobile-toggle {
                display: none !important;
            }
            .mobile-nav {
                display: none !important;
            }
        }

        @media (max-width: 767px) {
            .desktop-nav {
                display: none !important;
            }
            .site-header .container {
                height: 4rem;
            }
        }

        /* ===== Hero / Banner ===== */
        .page-banner {
            position: relative;
            min-height: 40vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #1e1b4b 0%, #312e81 40%, #4338ca 100%);
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(99, 102, 241, 0.25) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(217, 70, 239, 0.15) 0%, transparent 60%);
        }

        .page-banner>* {
            position: relative;
            z-index: 2;
        }

        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 1.2rem;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 9999px;
            color: #e0e7ff;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.02em;
            margin-bottom: 1.5rem;
        }

        .banner-badge i {
            color: #a5b4fc;
        }

        /* ===== 通用板块 ===== */
        .section-pad {
            padding: 5rem 0;
        }

        @media (max-width: 768px) {
            .section-pad {
                padding: 3rem 0;
            }
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.3rem 1rem;
            background: var(--brand-100);
            color: var(--brand-700);
            border-radius: 9999px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            margin-bottom: 1rem;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.25;
            color: #1e1b4b;
            letter-spacing: -0.02em;
        }

        .section-sub {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-sub {
                font-size: 0.95rem;
            }
        }

        /* ===== 卡片 ===== */
        .feature-card {
            background: #ffffff;
            border-radius: var(--radius-xl);
            padding: 2rem 1.75rem;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(79, 70, 229, 0.06);
            transition: var(--transition);
            height: 100%;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(79, 70, 229, 0.12);
        }

        .feature-card .icon-wrap {
            width: 3.5rem;
            height: 3.5rem;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 1.25rem;
            transition: var(--transition);
        }

        .feature-card:hover .icon-wrap {
            transform: scale(1.05);
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: #1e1b4b;
            margin-bottom: 0.5rem;
        }

        .feature-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== 步骤流程 ===== */
        .step-item {
            display: flex;
            gap: 1.5rem;
            align-items: flex-start;
            padding: 1.5rem;
            background: #ffffff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(79, 70, 229, 0.05);
            transition: var(--transition);
        }

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

        .step-number {
            flex-shrink: 0;
            width: 3rem;
            height: 3rem;
            border-radius: 9999px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 800;
            color: #fff;
            background: var(--brand-600);
        }

        .step-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #1e1b4b;
            margin-bottom: 0.3rem;
        }

        .step-content p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== 数据统计 ===== */
        .stat-item {
            text-align: center;
            padding: 1.5rem;
        }

        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: #1e1b4b;
            line-height: 1.2;
            letter-spacing: -0.03em;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 500;
            margin-top: 0.3rem;
        }

        @media (max-width: 768px) {
            .stat-number {
                font-size: 2rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid rgba(79, 70, 229, 0.06);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            overflow: hidden;
        }

        .faq-item:hover {
            border-color: rgba(79, 70, 229, 0.12);
            box-shadow: var(--shadow-hover);
        }

        .faq-question {
            padding: 1.25rem 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            color: #1e1b4b;
            font-size: 1rem;
            transition: var(--transition);
            user-select: none;
            gap: 1rem;
        }

        .faq-question i {
            color: var(--brand-500);
            font-size: 0.85rem;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 1.5rem;
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 1.5rem 1.5rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4338ca 100%);
            border-radius: var(--radius-xl);
            padding: 4rem 3rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(99, 102, 241, 0.3) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(217, 70, 239, 0.2) 0%, transparent 60%);
        }

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

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
        }

        .cta-section p {
            color: #c7d2fe;
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0.75rem auto 2rem;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.9rem 2.4rem;
            background: #ffffff;
            color: var(--brand-700);
            border-radius: 9999px;
            font-size: 1rem;
            font-weight: 700;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }

        .cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
            background: #f8fafc;
        }

        .cta-btn i {
            transition: transform 0.3s ease;
        }

        .cta-btn:hover i {
            transform: translateX(4px);
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 3rem 1.5rem;
                border-radius: var(--radius-lg);
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0f0a2a;
            color: #9ca3af;
        }

        .footer-divider {
            border: none;
            height: 1px;
            background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.08), transparent);
        }

        .site-footer a {
            color: #9ca3af;
            transition: var(--transition);
        }

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

        .site-footer h4 {
            color: #f1f5f9;
        }

        /* ===== 标签 ===== */
        .tag {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.8rem;
            background: var(--brand-50);
            color: var(--brand-700);
            border-radius: 9999px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            transition: var(--transition);
        }

        .tag:hover {
            background: var(--brand-100);
            transform: translateY(-1px);
        }

        /* ===== 工具类 ===== */
        .bg-soft-gradient {
            background: linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
        }

        .bg-brand-soft {
            background: var(--brand-50);
        }

        .text-balance {
            text-wrap: balance;
        }

        /* ===== 图片遮罩装饰 ===== */
        .img-mask {
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
        }

        .img-mask img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        /* ===== 响应式微调 ===== */
        @media (max-width: 520px) {
            .page-banner {
                min-height: 32vh;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .feature-card {
                padding: 1.5rem 1.25rem;
            }
            .step-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 1rem;
            }
            .step-number {
                width: 2.5rem;
                height: 2.5rem;
                font-size: 0.95rem;
            }
        }

        /* ===== 滚动动画 ===== */
        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== focus-visible ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--brand-500);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== 分隔装饰 ===== */
        .divider-wave {
            width: 100%;
            height: 6px;
            background: linear-gradient(90deg, var(--brand-400), var(--accent-500), var(--brand-400));
            opacity: 0.3;
            border-radius: 4px;
        }