/* roulang page: index */
:root {
            --brand-600: #4f46e5;
            --brand-700: #4338ca;
            --accent-500: #f59e0b;
            --dark: #0f172a;
            --bg: #f8fafc;
            --text: #1e293b;
            --text-light: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, .06);
            --shadow-md: 0 4px 16px rgba(15, 23, 42, .08);
            --shadow-lg: 0 16px 40px rgba(15, 23, 42, .12);
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
        }
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #f1f5f9;
        }
        ::-webkit-scrollbar-thumb {
            background: #cbd5e1;
            border-radius: 8px;
        }

        /* 侧边栏 */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 272px;
            height: 100vh;
            background: #fff;
            border-right: 1px solid var(--border);
            z-index: 50;
            display: flex;
            flex-direction: column;
            padding: 24px 20px;
            transform: translateX(-100%);
            transition: transform .3s ease;
        }
        .sidebar.open {
            transform: translateX(0);
        }
        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 8px 20px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 20px;
        }
        .sidebar-logo .logo-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-800));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }
        .sidebar-logo .logo-text {
            font-size: 16px;
            font-weight: 800;
            color: var(--dark);
            line-height: 1.35;
        }
        .sidebar-nav {
            flex: 1;
        }
        .sidebar-nav .nav-label {
            font-size: 12px;
            font-weight: 600;
            color: var(--text-light);
            text-transform: uppercase;
            letter-spacing: .05em;
            padding: 12px 12px 8px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 13px 12px;
            border-radius: 10px;
            color: var(--text);
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 4px;
            transition: background .2s, color .2s;
        }
        .sidebar-nav a i {
            width: 22px;
            text-align: center;
            color: var(--text-light);
            font-size: 16px;
            transition: color .2s;
        }
        .sidebar-nav a:hover {
            background: #f1f5f9;
            color: var(--brand-700);
        }
        .sidebar-nav a:hover i {
            color: var(--brand-600);
        }
        .sidebar-nav a.active {
            background: var(--brand-50);
            color: var(--brand-700);
            font-weight: 700;
        }
        .sidebar-nav a.active i {
            color: var(--brand-600);
        }
        .sidebar-footer {
            padding: 16px 8px 0;
            border-top: 1px solid var(--border);
            font-size: 12px;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* 移动端顶部 */
        .mobile-topbar {
            display: flex;
            align-items: center;
            gap: 14px;
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 14px 20px;
            position: sticky;
            top: 0;
            z-index: 40;
        }
        .mobile-topbar .menu-btn {
            background: transparent;
            border: none;
            font-size: 20px;
            color: var(--dark);
            padding: 6px;
            border-radius: 8px;
        }
        .mobile-topbar .menu-btn:hover {
            background: #f1f5f9;
        }
        .mobile-topbar .topbar-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--dark);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .sidebar-overlay {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, .5);
            z-index: 45;
            opacity: 0;
            pointer-events: none;
            transition: opacity .3s;
        }
        .sidebar-overlay.show {
            opacity: 1;
            pointer-events: auto;
        }

        @media (min-width: 1024px) {
            .sidebar {
                transform: translateX(0);
                width: 272px;
            }
            .mobile-topbar {
                display: none;
            }
            .main-content {
                margin-left: 272px;
            }
            .sidebar-overlay {
                display: none;
            }
        }

        /* 通用组件 */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            background: var(--brand-50);
            color: var(--brand-700);
            border: 1px solid rgba(79, 70, 229, .15);
        }
        .badge-accent {
            background: #fef3c7;
            color: #b45309;
            border-color: rgba(217, 119, 6, .15);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 13px 28px;
            border-radius: 12px;
            font-size: 14px;
            font-weight: 700;
            border: none;
            transition: all .25s;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--brand-600);
            color: #fff;
            box-shadow: 0 4px 16px rgba(79, 70, 229, .3);
        }
        .btn-primary:hover {
            background: var(--brand-700);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, .35);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, .85);
            color: #fff;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, .12);
            transform: translateY(-2px);
        }
        .btn-accent {
            background: var(--accent-500);
            color: #fff;
            box-shadow: 0 4px 14px rgba(245, 158, 11, .3);
        }
        .btn-accent:hover {
            background: var(--accent-600);
            transform: translateY(-2px);
        }
        .card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform .25s, box-shadow .25s;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .section-title {
            font-size: 28px;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: -.02em;
            line-height: 1.2;
        }
        .section-sub {
            font-size: 15px;
            color: var(--text-light);
            margin-top: 8px;
        }

        /* Hero */
        .hero {
            position: relative;
            padding: 90px 0;
            background-image: linear-gradient(135deg, rgba(15, 23, 42, .9) 0%, rgba(49, 46, 129, .78) 100%), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            color: #fff;
        }

        /* 特性图标 */
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: #fff;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-800));
            margin-bottom: 18px;
        }
        .feature-icon.accent {
            background: linear-gradient(135deg, #f59e0b, #d97706);
        }
        .feature-icon.green {
            background: linear-gradient(135deg, #10b981, #059669);
        }
        .feature-icon.pink {
            background: linear-gradient(135deg, #ec4899, #db2777);
        }

        /* 分类卡片 */
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: flex-end;
            color: #fff;
            transition: transform .3s, box-shadow .3s;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .cat-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            transition: transform .4s;
            z-index: 0;
        }
        .category-card:hover .cat-bg {
            transform: scale(1.05);
        }
        .cat-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 30%, rgba(15, 23, 42, .88) 100%);
            z-index: 1;
        }
        .cat-content {
            position: relative;
            z-index: 2;
            padding: 26px;
            width: 100%;
        }

        /* 列表项 */
        .post-item {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            border-radius: 14px;
            background: #fff;
            border: 1px solid var(--border);
            transition: transform .2s, box-shadow .2s, border-color .2s;
            margin-bottom: 12px;
        }
        .post-item:hover {
            transform: translateX(4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(79, 70, 229, .3);
        }
        .post-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark);
            line-height: 1.4;
            margin-bottom: 4px;
        }
        .post-desc {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* 数据 */
        .stat-card {
            text-align: center;
            padding: 32px 24px;
            background: rgba(255, 255, 255, .06);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, .1);
            transition: background .3s, transform .3s;
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, .1);
            transform: translateY(-2px);
        }
        .stat-num {
            font-size: 42px;
            font-weight: 800;
            color: #fff;
            line-height: 1;
        }
        .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, .7);
            margin-top: 8px;
        }

        /* 流程 */
        .step-item {
            position: relative;
            text-align: center;
            padding: 28px 20px;
        }
        .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--brand-600);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 800;
            margin: 0 auto 16px;
            box-shadow: 0 4px 12px rgba(79, 70, 229, .3);
        }
        .step-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 6px;
        }
        .step-desc {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.5;
        }

        /* FAQ */
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 20px 24px;
            margin-bottom: 12px;
            cursor: pointer;
            transition: box-shadow .2s, border-color .2s;
        }
        .faq-item:hover {
            border-color: rgba(79, 70, 229, .3);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 15px;
            font-weight: 700;
            color: var(--dark);
            gap: 16px;
        }
        .faq-answer {
            display: none;
            padding-top: 12px;
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-icon {
            transition: transform .3s;
            color: var(--brand-600);
            flex-shrink: 0;
        }

        /* CTA */
        .cta-section {
            background-image: linear-gradient(135deg, rgba(49, 46, 129, .92), rgba(79, 70, 229, .85)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            border-radius: 24px;
            padding: 60px 40px;
            text-align: center;
            color: #fff;
        }

        /* 页脚 */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, .8);
            padding: 48px 0 24px;
            margin-top: 60px;
        }
        .site-footer a {
            color: rgba(255, 255, 255, .7);
        }
        .site-footer a:hover {
            color: #fff;
        }

        .btn:focus-visible,
        .sidebar-nav a:focus-visible,
        .faq-item:focus-visible {
            outline: 2px solid var(--brand-600);
            outline-offset: 2px;
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 24px;
            }
            .hero {
                padding: 60px 0;
            }
            .cta-section {
                padding: 40px 24px;
            }
            .post-item {
                flex-direction: column;
            }
        }

/* roulang page: article */
* {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            background: #f8fafc;
            color: #1e293b;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            transition: all .2s ease;
        }
        img {
            max-width: 100%;
            display: block;
        }
        .sidebar-nav a.active {
            background: rgba(79, 70, 229, .15);
            color: #a5b4fc;
            box-shadow: inset 3px 0 0 #6366f1;
        }
        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, .06);
            color: #fff;
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: #334155;
        }
        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 2.2rem 0 1rem;
            color: #0f172a;
            padding-left: 1rem;
            border-left: 4px solid #4f46e5;
            border-radius: 2px;
        }
        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 1.8rem 0 .8rem;
            color: #1e293b;
        }
        .article-content p {
            margin-bottom: 1.25rem;
        }
        .article-content ul {
            list-style: none;
            margin: 1rem 0;
            padding: 0;
        }
        .article-content ul li {
            position: relative;
            padding-left: 1.6rem;
            margin-bottom: .55rem;
        }
        .article-content ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: .65em;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #4f46e5;
        }
        .article-content ol {
            margin: 1rem 0;
            padding-left: 1.4rem;
        }
        .article-content ol li {
            margin-bottom: .5rem;
            padding-left: .3rem;
        }
        .article-content blockquote {
            border-left: 4px solid #f59e0b;
            background: #fffbeb;
            padding: 1rem 1.25rem;
            border-radius: .75rem;
            margin: 1.5rem 0;
            color: #78350f;
        }
        .article-content img {
            border-radius: 1rem;
            margin: 1.5rem auto;
            box-shadow: 0 10px 30px -10px rgba(0, 0, 0, .1);
        }
        .article-content a {
            color: #4f46e5;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content code {
            background: #f1f5f9;
            padding: .15rem .4rem;
            border-radius: .35rem;
            font-size: .9em;
            color: #3b0764;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
        }
        .article-content th,
        .article-content td {
            border: 1px solid #e2e8f0;
            padding: .6rem .8rem;
            text-align: left;
        }
        .article-content th {
            background: #f8fafc;
            font-weight: 600;
        }
        .line-clamp-2 {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #f1f5f9;
        }
        ::-webkit-scrollbar-thumb {
            background: #cbd5e1;
            border-radius: 99px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #94a3b8;
        }
        .sidebar-scroll::-webkit-scrollbar {
            width: 4px;
        }
        .sidebar-scroll::-webkit-scrollbar-track {
            background: transparent;
        }
        .sidebar-scroll::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, .15);
            border-radius: 99px;
        }
        @media (max-width: 1024px) {
            .sidebar-nav a {
                padding-left: .8rem;
                padding-right: .8rem;
                font-size: .95rem;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :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;
            --brand-950: #1e1b4b;
            --text-main: #1e293b;
            --text-sub: #64748b;
            --bg-body: #f8fafc;
            --border-light: #e2e8f0;
            --shadow-card: 0 4px 20px rgba(30, 27, 75, 0.06);
            --shadow-hover: 0 12px 40px rgba(30, 27, 75, 0.12);
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
        }

        button,
        input {
            font-family: inherit;
        }

        .container-custom {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        @media (min-width: 640px) {
            .container-custom {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        @media (min-width: 1024px) {
            .container-custom {
                padding-left: 3rem;
                padding-right: 3rem;
            }
        }

        /* ===== Sidebar ===== */
        .sidebar {
            background: linear-gradient(180deg, #0f172a 0%, #1e1b4b 100%);
        }

        .sidebar-nav a {
            position: relative;
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 12px;
            color: #94a3b8;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.2s ease;
        }

        .sidebar-nav a:hover {
            background: rgba(99, 102, 241, 0.15);
            color: #ffffff;
            transform: translateX(4px);
        }

        .sidebar-nav a.active {
            background: rgba(99, 102, 241, 0.22);
            color: #ffffff;
            box-shadow: 0 0 24px rgba(99, 102, 241, 0.15);
        }

        .sidebar-nav a.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 22px;
            border-radius: 0 3px 3px 0;
            background: #6366f1;
            box-shadow: 0 0 12px rgba(99, 102, 241, 0.6);
        }

        .sidebar-nav .nav-label {
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: #64748b;
            padding: 0 16px;
            margin-bottom: 8px;
            font-weight: 600;
        }

        /* ===== Mobile Menu ===== */
        .mobile-menu-panel {
            transition: all 0.3s ease;
            max-height: 0;
            overflow: hidden;
        }

        .mobile-menu-panel.open {
            max-height: 400px;
        }

        .mobile-menu-panel a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 20px;
            color: #94a3b8;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.2s;
        }

        .mobile-menu-panel a:hover {
            background: rgba(99, 102, 241, 0.15);
            color: #ffffff;
        }

        .mobile-menu-panel a.active {
            background: rgba(99, 102, 241, 0.25);
            color: #ffffff;
            border-left: 3px solid #6366f1;
        }

        /* ===== Hero ===== */
        .category-hero {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 27, 75, 0.78) 60%, rgba(49, 46, 129, 0.7) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            position: relative;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(180deg, transparent 0%, var(--bg-body) 100%);
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 999px;
            background: rgba(99, 102, 241, 0.25);
            border: 1px solid rgba(99, 102, 241, 0.4);
            color: #a5b4fc;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        /* ===== Cards ===== */
        .feature-card {
            transition: all 0.3s ease;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: #c7d2fe;
        }

        .review-card {
            transition: all 0.3s ease;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
        }

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

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

        .review-card-img {
            transition: transform 0.4s ease;
        }

        .rank-item {
            transition: all 0.25s ease;
        }

        .rank-item:hover {
            background: #f1f5f9;
            transform: translateX(4px);
        }

        /* ===== FAQ ===== */
        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: 16px;
            transition: all 0.25s ease;
            background: #ffffff;
        }

        .faq-item summary {
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item .icon-toggle {
            transition: transform 0.3s ease;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: #eef2ff;
            color: #6366f1;
            font-size: 14px;
        }

        .faq-item[open] .icon-toggle {
            transform: rotate(45deg);
            background: #6366f1;
            color: #ffffff;
        }

        .faq-item[open] {
            border-color: #c7d2fe;
            box-shadow: 0 4px 24px rgba(99, 102, 241, 0.08);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #3730a3 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(99, 102, 241, 0.15);
            filter: blur(60px);
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -60%;
            left: -10%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(99, 102, 241, 0.1);
            filter: blur(50px);
        }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            background: #4f46e5;
            color: #ffffff;
            font-weight: 600;
            font-size: 14px;
            transition: all 0.25s ease;
            box-shadow: 0 4px 16px rgba(79, 70, 229, 0.35);
        }

        .btn-primary:hover {
            background: #4338ca;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.4);
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #e2e8f0;
            font-weight: 600;
            font-size: 14px;
            transition: all 0.25s ease;
            background: transparent;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.6);
            color: #ffffff;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 999px;
            background: #ffffff;
            color: #4f46e5;
            font-weight: 600;
            font-size: 13px;
            border: 1px solid #e0e7ff;
            transition: all 0.25s ease;
            box-shadow: 0 2px 8px rgba(30, 27, 75, 0.05);
        }

        .btn-secondary:hover {
            background: #eef2ff;
            border-color: #c7d2fe;
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
        }

        .site-footer a {
            transition: color 0.2s ease;
        }

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

        /* ===== Focus ===== */
        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 2px solid #6366f1;
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== Section spacing ===== */
        .section-padding {
            padding-top: 72px;
            padding-bottom: 72px;
        }

        @media (max-width: 768px) {
            .section-padding {
                padding-top: 48px;
                padding-bottom: 48px;
            }
        }

        /* ===== Utility ===== */
        .title-underline {
            position: relative;
            display: inline-block;
        }

        .title-underline::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 0;
            width: 48px;
            height: 3px;
            border-radius: 3px;
            background: linear-gradient(90deg, #6366f1, #a5b4fc);
        }

/* roulang page: category3 */
:root {
            --brand: #2563eb;
            --brand-dark: #1d4ed8;
            --brand-light: #3b82f6;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --bg-body: #f1f5f9;
            --bg-card: #ffffff;
            --text-body: #1e293b;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius: 1rem;
            --radius-sm: 0.75rem;
            --radius-lg: 1.25rem;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.14);
            --sidebar-w: 280px;
            --transition: all .3s cubic-bezier(.4, 0, .2, 1);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            background: var(--bg-body);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            display: block;
            max-width: 100%;
        }
        button {
            font-family: inherit;
            border: none;
            cursor: pointer;
            background: none;
        }
        input {
            font-family: inherit;
            outline: none;
        }

        /* ---------- 侧边栏 ---------- */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-w);
            z-index: 60;
            background: #ffffff;
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            padding: 32px 22px;
            transition: transform .35s cubic-bezier(.4, 0, .2, 1);
            box-shadow: 2px 0 30px rgba(15, 23, 42, .04);
        }
        .sidebar-inner {
            display: flex;
            flex-direction: column;
            height: 100%;
            gap: 34px;
        }
        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            padding-bottom: 22px;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-logo .logo-icon {
            width: 44px;
            height: 44px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--brand), var(--brand-dark));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            flex-shrink: 0;
            box-shadow: 0 6px 20px rgba(37, 99, 235, .35);
        }
        .sidebar-logo .logo-text {
            font-weight: 800;
            font-size: 17px;
            color: #1e293b;
            letter-spacing: .5px;
            line-height: 1.3;
        }
        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1;
        }
        .nav-label {
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: #94a3b8;
            margin-bottom: 10px;
            padding-left: 12px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 13px;
            padding: 13px 14px;
            border-radius: 12px;
            font-size: 14px;
            font-weight: 600;
            color: #475569;
            background: transparent;
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .sidebar-nav a i {
            width: 22px;
            text-align: center;
            font-size: 16px;
            opacity: .75;
        }
        .sidebar-nav a:hover {
            background: #f8fafc;
            color: var(--brand);
            transform: translateX(3px);
            border-color: #e0e7ff;
        }
        .sidebar-nav a.active {
            background: linear-gradient(135deg, #eff6ff, #dbeafe);
            color: var(--brand-dark);
            border-color: #bfdbfe;
            font-weight: 700;
            box-shadow: 0 2px 12px rgba(37, 99, 235, .08);
        }
        .sidebar-nav a.active i {
            color: var(--brand);
            opacity: 1;
        }
        .sidebar-close {
            display: none;
            margin-left: auto;
            font-size: 18px;
            color: #64748b;
            padding: 6px 10px;
            border-radius: 8px;
            background: #f1f5f9;
        }

        /* ---------- 主内容 ---------- */
        .main-content {
            margin-left: var(--sidebar-w);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            background: var(--bg-body);
        }

        /* ---------- 移动端头部 ---------- */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 62px;
            z-index: 70;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, .7);
            align-items: center;
            padding: 0 16px;
            gap: 12px;
            box-shadow: 0 2px 20px rgba(15, 23, 42, .05);
        }
        .mobile-header .menu-btn {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: #f1f5f9;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #475569;
            font-size: 17px;
        }
        .mobile-header .mobile-logo {
            font-weight: 800;
            font-size: 15px;
            color: #1e293b;
            line-height: 1.2;
        }
        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 55;
            background: rgba(15, 23, 42, .5);
            backdrop-filter: blur(2px);
            -webkit-backdrop-filter: blur(2px);
        }
        .mobile-overlay.show {
            display: block;
        }

        /* ---------- 页面Hero ---------- */
        .page-hero {
            position: relative;
            padding: 88px 48px 64px;
            background: linear-gradient(135deg, rgba(15, 23, 42, .82), rgba(30, 41, 59, .65)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
            overflow: hidden;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -40px;
            right: -20px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 255, 255, .08), transparent 70%);
            pointer-events: none;
        }
        .page-hero .hero-breadcrumb {
            font-size: 13px;
            color: rgba(255, 255, 255, .6);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 18px;
            letter-spacing: .3px;
        }
        .page-hero .hero-breadcrumb a {
            color: rgba(255, 255, 255, .7);
            font-weight: 500;
        }
        .page-hero .hero-breadcrumb a:hover {
            color: #fff;
        }
        .page-hero .hero-breadcrumb i {
            font-size: 10px;
            opacity: .7;
        }
        .page-hero h1 {
            font-size: clamp(30px, 4vw, 44px);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: 1px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, .25);
        }
        .page-hero h1 span {
            color: var(--accent-300, #fcd34d);
        }
        .page-hero p {
            font-size: 16px;
            max-width: 620px;
            color: rgba(255, 255, 255, .8);
            line-height: 1.75;
            margin-bottom: 28px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .btn-hero-primary {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            padding: 13px 26px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 14px;
            background: linear-gradient(135deg, var(--brand-light), var(--brand-dark));
            color: #fff;
            box-shadow: 0 8px 24px rgba(37, 99, 235, .35);
            transition: var(--transition);
        }
        .btn-hero-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(37, 99, 235, .45);
        }
        .btn-hero-ghost {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            padding: 13px 26px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            background: rgba(255, 255, 255, .1);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .25);
            backdrop-filter: blur(6px);
            transition: var(--transition);
        }
        .btn-hero-ghost:hover {
            background: rgba(255, 255, 255, .2);
            border-color: rgba(255, 255, 255, .4);
        }

        /* ---------- 数据概览 ---------- */
        .stats-section {
            padding: 48px 24px 20px;
            max-width: 1240px;
            margin: 0 auto;
            width: 100%;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 22px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            text-align: left;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--brand), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .stat-card:hover::before {
            opacity: 1;
        }
        .stat-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 16px;
            background: #eff6ff;
            color: var(--brand);
        }
        .stat-card:nth-child(2) .stat-icon {
            background: #fef3c7;
            color: #d97706;
        }
        .stat-card:nth-child(3) .stat-icon {
            background: #dcfce7;
            color: #16a34a;
        }
        .stat-card:nth-child(4) .stat-icon {
            background: #fae8ff;
            color: #c026d3;
        }
        .stat-number {
            font-size: 32px;
            font-weight: 800;
            color: #0f172a;
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .stat-desc {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 6px;
            font-weight: 500;
        }

        /* ---------- 活动卡片 ---------- */
        .activities-section {
            padding: 48px 24px 20px;
            max-width: 1240px;
            margin: 0 auto;
            width: 100%;
        }
        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 14px;
        }
        .section-header h2 {
            font-size: 26px;
            font-weight: 800;
            color: #0f172a;
            position: relative;
            padding-left: 18px;
            line-height: 1.3;
        }
        .section-header h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 5px;
            border-radius: 8px;
            background: linear-gradient(180deg, var(--brand), var(--accent));
        }
        .section-header .section-sub {
            font-size: 14px;
            color: var(--text-muted);
        }
        .section-header .view-all {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand);
            background: #eff6ff;
            padding: 9px 18px;
            border-radius: 50px;
            transition: var(--transition);
        }
        .section-header .view-all:hover {
            background: var(--brand);
            color: #fff;
            transform: translateX(3px);
        }
        .activities-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .activity-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .activity-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: #bfdbfe;
        }
        .activity-cover {
            position: relative;
            height: 170px;
            overflow: hidden;
        }
        .activity-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s cubic-bezier(.4, 0, .2, 1);
        }
        .activity-card:hover .activity-cover img {
            transform: scale(1.06);
        }
        .activity-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(15, 23, 42, .28));
        }
        .activity-status {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            padding: 5px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 700;
            color: #fff;
            letter-spacing: .4px;
            backdrop-filter: blur(4px);
        }
        .activity-status.live {
            background: rgba(22, 163, 74, .9);
        }
        .activity-status.soon {
            background: rgba(245, 158, 11, .9);
        }
        .activity-status.ended {
            background: rgba(100, 116, 139, .8);
        }
        .activity-cat {
            position: absolute;
            bottom: 12px;
            left: 14px;
            z-index: 2;
            font-size: 11px;
            font-weight: 600;
            background: rgba(255, 255, 255, .92);
            color: var(--brand-dark);
            padding: 4px 12px;
            border-radius: 30px;
            backdrop-filter: blur(4px);
        }
        .activity-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .activity-body h3 {
            font-size: 16px;
            font-weight: 700;
            color: #0f172a;
            line-height: 1.45;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .activity-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 12px;
            flex-wrap: wrap;
        }
        .activity-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .activity-meta i {
            font-size: 12px;
            color: #94a3b8;
        }
        .activity-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 18px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .activity-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid #f1f5f9;
        }
        .activity-footer .more-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--brand);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .activity-footer .more-link:hover {
            gap: 10px;
        }

        /* ---------- 活动类型 ---------- */
        .types-section {
            padding: 48px 24px;
            max-width: 1240px;
            margin: 0 auto;
            width: 100%;
        }
        .types-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }
        .type-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 26px 24px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
            transition: var(--transition);
        }
        .type-card:hover {
            border-color: var(--brand-light);
            box-shadow: var(--shadow);
            transform: translateY(-4px);
        }
        .type-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: linear-gradient(135deg, #eff6ff, #dbeafe);
            color: var(--brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }
        .type-card:nth-child(2) .type-icon {
            background: linear-gradient(135deg, #fef3c7, #fde68a);
            color: #d97706;
        }
        .type-card:nth-child(3) .type-icon {
            background: linear-gradient(135deg, #dcfce7, #bbf7d0);
            color: #16a34a;
        }
        .type-card:nth-child(4) .type-icon {
            background: linear-gradient(135deg, #fae8ff, #f5d0fe);
            color: #c026d3;
        }
        .type-card:nth-child(5) .type-icon {
            background: linear-gradient(135deg, #fee2e2, #fecaca);
            color: #dc2626;
        }
        .type-card:nth-child(6) .type-icon {
            background: linear-gradient(135deg, #e0e7ff, #c7d2fe);
            color: #4f46e5;
        }
        .type-info h3 {
            font-size: 15px;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 6px;
        }
        .type-info p {
            font-size: 13px;
            line-height: 1.55;
            color: var(--text-muted);
        }

        /* ---------- 流程 ---------- */
        .process-section {
            padding: 48px 24px;
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .process-inner {
            max-width: 1240px;
            margin: 0 auto;
            width: 100%;
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 32px;
        }
        .step-card {
            text-align: center;
            padding: 30px 18px;
            border-radius: var(--radius);
            background: #f8fafc;
            border: 1px dashed var(--border);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            border-color: var(--brand);
            background: #f0f7ff;
            transform: translateY(-4px);
        }
        .step-number {
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand), var(--brand-dark));
            color: #fff;
            font-size: 17px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 8px 20px rgba(37, 99, 235, .3);
        }
        .step-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .step-arrow {
            position: absolute;
            top: 50%;
            right: -20px;
            transform: translateY(-50%);
            color: #cbd5e1;
            font-size: 14px;
            z-index: 2;
        }

        /* ---------- FAQ ---------- */
        .faq-section {
            padding: 56px 24px 24px;
            max-width: 1240px;
            margin: 0 auto;
            width: 100%;
        }
        .faq-wrap {
            max-width: 820px;
            margin: 36px auto 0;
        }
        .faq-item {
            background: #fff;
            border-radius: 16px;
            border: 1px solid var(--border);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: #bfdbfe;
            box-shadow: 0 4px 16px rgba(37, 99, 235, .06);
        }
        .faq-item summary {
            padding: 20px 26px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: #0f172a;
            display: flex;
            align-items: center;
            gap: 12px;
            list-style: none;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: #eff6ff;
            color: var(--brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            flex-shrink: 0;
            transition: var(--transition);
        }
        .faq-item[open] summary .faq-icon {
            transform: rotate(90deg);
            background: var(--brand);
            color: #fff;
        }
        .faq-item .faq-body {
            padding: 0 26px 20px 66px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
        }

        /* ---------- CTA ---------- */
        .cta-section {
            padding: 64px 24px;
            max-width: 1240px;
            margin: 0 auto;
            width: 100%;
        }
        .cta-inner {
            position: relative;
            border-radius: 24px;
            padding: 56px 48px;
            overflow: hidden;
            background: linear-gradient(135deg, rgba(30, 64, 175, .92), rgba(37, 99, 235, .85)), url('/assets/images/backpic/back-1.png') center/cover;
            color: #fff;
            text-align: center;
            box-shadow: 0 16px 50px rgba(37, 99, 235, .3);
        }
        .cta-inner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .1);
        }
        .cta-inner h2 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: .5px;
        }
        .cta-inner p {
            font-size: 15px;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 28px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-cta-light {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            padding: 13px 30px;
            border-radius: 50px;
            background: #fff;
            color: var(--brand-dark);
            font-weight: 700;
            font-size: 14px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, .12);
            transition: var(--transition);
        }
        .btn-cta-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, .18);
        }
        .btn-cta-outline {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            padding: 13px 30px;
            border-radius: 50px;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .35);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            backdrop-filter: blur(6px);
            transition: var(--transition);
        }
        .btn-cta-outline:hover {
            background: rgba(255, 255, 255, .2);
            border-color: rgba(255, 255, 255, .6);
        }

        /* ---------- 页脚 ---------- */
        .site-footer {
            margin-top: auto;
            background: linear-gradient(135deg, #0f172a, #1e293b);
            padding: 48px 0 28px;
            color: #94a3b8;
        }
        .site-footer a {
            transition: var(--transition);
        }
        .site-footer a:hover {
            color: #fff;
        }

        /* ---------- 响应式 ---------- */
        @media (max-width: 1023px) {
            .sidebar {
                transform: translateX(-100%);
                box-shadow: 4px 0 40px rgba(15, 23, 42, .15);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-close {
                display: flex;
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 62px;
            }
            .page-hero {
                padding: 56px 24px 44px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .activities-grid,
            .types-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .step-arrow {
                display: none;
            }
            .page-hero h1 {
                font-size: 30px;
            }
        }
        @media (max-width: 640px) {
            .mobile-header {
                height: 56px;
            }
            .page-hero {
                padding: 44px 18px 36px;
            }
            .page-hero h1 {
                font-size: 25px;
            }
            .page-hero p {
                font-size: 14px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stat-card {
                padding: 20px 16px;
            }
            .stat-number {
                font-size: 24px;
            }
            .activities-grid,
            .types-grid,
            .process-grid {
                grid-template-columns: 1fr;
            }
            .activities-section,
            .types-section,
            .stats-section,
            .faq-section,
            .cta-section {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section-header {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-inner {
                padding: 40px 24px;
                border-radius: 20px;
            }
            .cta-inner h2 {
                font-size: 23px;
            }
            .faq-item summary {
                padding: 16px 18px;
                font-size: 14px;
            }
            .faq-item .faq-body {
                padding: 0 18px 18px 48px;
                font-size: 13px;
            }
        }
        @media (max-width: 380px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn-hero-primary,
            .hero-actions .btn-hero-ghost {
                justify-content: center;
            }
        }

/* roulang page: category2 */
:root {
            --brand-600: #4f46e5;
            --sidebar-width: 260px;
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            background-color: #f8fafc;
            color: #1e293b;
            line-height: 1.65;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            display: block;
            max-width: 100%;
        }

        /* App Shell */
        .app-shell {
            display: flex;
            min-height: 100vh;
        }
        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: #0f172a;
            display: flex;
            flex-direction: column;
            padding: 1.5rem 1rem 1rem;
            z-index: 100;
            overflow-y: auto;
        }
        .main-wrapper {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        /* Sidebar */
        .sidebar-brand {
            position: relative;
            display: flex;
            align-items: center;
            gap: 0.7rem;
            padding: 0.25rem 0.5rem 1.1rem;
            margin-bottom: 0.9rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 0.3rem;
            flex: 1;
        }
        .nav-label {
            font-size: 0.7rem;
            color: #64748b;
            letter-spacing: 0.08em;
            padding: 0 0.8rem;
            margin-bottom: 0.2rem;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 0.7rem;
            padding: 0.65rem 0.9rem;
            border-radius: 0.7rem;
            color: #94a3b8;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all 0.2s ease;
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 0.9rem;
        }
        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #ffffff;
        }
        .sidebar-nav a.active {
            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
        }
        .sidebar-foot {
            padding-top: 1rem;
            margin-top: 1rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            text-align: center;
            color: #64748b;
        }

        /* Mobile Header */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 90;
            background: #0f172a;
            align-items: center;
            justify-content: space-between;
            padding: 0.7rem 1.25rem;
        }
        .brand-text {
            font-weight: 700;
            font-size: 1rem;
            color: #ffffff;
            line-height: 1.3;
        }

        /* Overlay */
        .sidebar-overlay {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.6);
            z-index: 95;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        .sidebar-overlay.active {
            opacity: 1;
            visibility: visible;
        }

        /* Hero */
        .page-hero {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: 5rem 0 4.5rem;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 23, 42, 0.93) 0%, rgba(30, 27, 75, 0.82) 55%, rgba(79, 70, 229, 0.5) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }

        /* Sections */
        .section-block {
            padding: 4rem 0;
        }
        .section-title {
            font-size: 1.875rem;
            font-weight: 800;
            line-height: 1.25;
            color: #0f172a;
            letter-spacing: -0.02em;
        }
        .section-subtitle {
            color: #64748b;
            font-size: 1rem;
            margin-top: 0.6rem;
        }
        @media (max-width: 767px) {
            .section-title {
                font-size: 1.5rem;
            }
        }

        /* FAQ */
        .faq-item {
            background: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 0.9rem;
            overflow: hidden;
            transition: box-shadow 0.2s ease, border-color 0.2s ease;
        }
        .faq-item:hover {
            border-color: #c7d2fe;
            box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
        }
        .faq-item details summary {
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.1rem 1.4rem;
            cursor: pointer;
            font-weight: 600;
            color: #1e293b;
        }
        .faq-item details summary::-webkit-details-marker {
            display: none;
        }
        .faq-item details summary .fa-chevron-down {
            transition: transform 0.3s ease;
            color: #94a3b8;
            font-size: 0.85rem;
        }
        .faq-item details[open] summary .fa-chevron-down {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 1.4rem 1.2rem;
            color: #64748b;
            font-size: 0.925rem;
            line-height: 1.7;
        }

        /* Footer */
        .site-footer {
            background: #0f172a;
            padding: 3.5rem 0 1.8rem;
            margin-top: auto;
        }
        .site-footer a {
            color: #94a3b8;
            transition: color 0.2s ease;
        }
        .site-footer a:hover {
            color: #c7d2fe;
        }

        /* Responsive */
        @media (max-width: 1023px) {
            .app-sidebar {
                transform: translateX(-100%);
                transition: transform 0.3s ease;
            }
            .app-sidebar.open {
                transform: translateX(0);
                box-shadow: 0 0 60px rgba(0, 0, 0, 0.35);
            }
            .main-wrapper {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
        }

        /* Focus visibility */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid #818cf8;
            outline-offset: 2px;
        }