/* roulang page: index */
:root {
            --primary: #1A6DF5;
            --primary-hover: #4B8CFF;
            --secondary: #D4A843;
            --secondary-hover: #E6BE5A;
            --bg-deep: #0B1424;
            --bg-card: #131E33;
            --bg-dark: #060B14;
            --text-white: #FFFFFF;
            --text-body: #E8EDF5;
            --text-muted: #8A9BB5;
            --text-dim: #4A5A7A;
            --success: #34C759;
            --warning: #FF9500;
            --error: #FF3B30;
            --info: #5AC8FA;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 8px 32px rgba(0,0,0,0.3);
            --shadow-glow: 0 0 20px rgba(26,109,245,0.4);
            --shadow-gold: 0 0 20px rgba(212,168,67,0.3);
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background-color: var(--bg-deep);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--text-body);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--primary-hover);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        .container-page {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        @media (min-width: 768px) {
            .container-page {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        .glass-card {
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
        }
        .glass-card:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(255, 255, 255, 0.1);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.625rem 1.75rem;
            min-height: 44px;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: var(--radius-md);
            background: var(--primary);
            color: #fff;
            border: none;
            cursor: pointer;
            transition: all 0.25s ease;
            box-shadow: 0 0 20px rgba(26, 109, 245, 0.35);
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: 0 0 32px rgba(26, 109, 245, 0.55);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 16px rgba(26, 109, 245, 0.3);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.625rem 1.75rem;
            min-height: 44px;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: var(--radius-md);
            background: transparent;
            color: var(--text-white);
            border: 1px solid rgba(255, 255, 255, 0.15);
            cursor: pointer;
            transition: all 0.25s ease;
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary-hover);
            background: rgba(26, 109, 245, 0.08);
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }
        .btn-gold {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.625rem 1.75rem;
            min-height: 44px;
            font-weight: 500;
            font-size: 0.95rem;
            border-radius: var(--radius-md);
            background: var(--secondary);
            color: #0B1424;
            border: none;
            cursor: pointer;
            transition: all 0.25s ease;
            box-shadow: 0 0 20px rgba(212, 168, 67, 0.25);
        }
        .btn-gold:hover {
            background: var(--secondary-hover);
            box-shadow: 0 0 32px rgba(212, 168, 67, 0.45);
            transform: translateY(-2px);
            color: #0B1424;
        }
        .badge {
            display: inline-block;
            padding: 0.2rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 500;
            border-radius: 999px;
            background: rgba(26, 109, 245, 0.15);
            color: var(--primary-hover);
            border: 1px solid rgba(26, 109, 245, 0.2);
        }
        .badge-gold {
            background: rgba(212, 168, 67, 0.15);
            color: var(--secondary);
            border-color: rgba(212, 168, 67, 0.2);
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 600;
            line-height: 1.3;
            color: var(--text-white);
            margin-bottom: 0.5rem;
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 600px;
        }
        .divider-gradient {
            height: 1px;
            background: linear-gradient(to right, transparent, rgba(26, 109, 245, 0.2), transparent);
            margin: 3rem 0;
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--secondary);
            line-height: 1.2;
        }
        @media (min-width: 768px) {
            .stat-number {
                font-size: 3.75rem;
            }
            .section-title {
                font-size: 2.5rem;
            }
        }
        .glow-line {
            height: 2px;
            width: 48px;
            background: var(--primary);
            border-radius: 2px;
            margin-bottom: 1rem;
            box-shadow: 0 0 12px rgba(26, 109, 245, 0.5);
        }
        .glow-line-gold {
            background: var(--secondary);
            box-shadow: 0 0 12px rgba(212, 168, 67, 0.5);
        }
        .faq-accordion .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 1.5rem;
        }
        .faq-accordion .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.5rem 1.5rem;
        }
        .faq-accordion .faq-item .faq-toggle {
            transition: transform 0.3s ease;
        }
        .faq-accordion .faq-item.active .faq-toggle {
            transform: rotate(180deg);
        }
        .hero-bg {
            position: relative;
            background: radial-gradient(circle at 30% 50%, #1A3A6A 0%, #0B1424 70%);
            overflow: hidden;
        }
        .hero-bg::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.06;
            pointer-events: none;
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 60%;
            height: 100%;
            background: radial-gradient(ellipse at center right, rgba(26, 109, 245, 0.08), transparent 70%);
            pointer-events: none;
        }
        .hero-grid-overlay {
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
            background-size: 60px 60px;
            pointer-events: none;
            opacity: 0.4;
        }
        .cover-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .cover-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
        }
        .nav-link-active {
            color: var(--primary-hover) !important;
        }
        .mobile-nav {
            display: none;
        }
        .mobile-nav.open {
            display: flex;
        }
        @media (max-width: 1023px) {
            .desktop-nav-links {
                display: none !important;
            }
            .desktop-search {
                display: none !important;
            }
            .mobile-nav-toggle {
                display: flex !important;
            }
            .mobile-nav.open {
                display: flex;
            }
        }
        @media (min-width: 1024px) {
            .mobile-nav-toggle {
                display: none !important;
            }
            .mobile-nav {
                display: none !important;
            }
        }
        .search-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(11, 20, 36, 0.92);
            backdrop-filter: blur(20px);
            z-index: 60;
            align-items: flex-start;
            justify-content: center;
            padding-top: 6rem;
        }
        .search-overlay.open {
            display: flex;
        }
        .result-compare-item {
            padding: 1rem 1.25rem;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: all 0.3s ease;
        }
        .result-compare-item.platform {
            border-color: rgba(26, 109, 245, 0.25);
            background: rgba(26, 109, 245, 0.06);
        }
        .result-compare-item.platform .value {
            color: var(--secondary);
            font-weight: 700;
        }
        .result-compare-item.traditional {
            border-color: rgba(255, 255, 255, 0.06);
            opacity: 0.7;
        }
        .result-compare-item.traditional .value {
            color: var(--text-dim);
        }
        .form-input {
            width: 100%;
            padding: 0.75rem 1rem;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-white);
            font-size: 0.95rem;
            transition: border-color 0.2s ease, background 0.2s ease;
            outline: none;
        }
        .form-input:focus {
            border-color: var(--primary);
            background: rgba(255, 255, 255, 0.08);
            box-shadow: 0 0 0 3px rgba(26, 109, 245, 0.15);
        }
        .form-input::placeholder {
            color: var(--text-dim);
        }
        .form-select {
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='%238A9BB5'%3E%3Cpath d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 1rem center;
            padding-right: 2.5rem;
        }
        .form-select option {
            background: #131E33;
            color: #E8EDF5;
        }
        .footer-link {
            color: var(--text-muted);
            transition: color 0.2s ease;
        }
        .footer-link:hover {
            color: var(--primary-hover);
        }
        .cms-card {
            transition: all 0.3s ease;
        }
        .cms-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35);
        }
        .cms-card .cms-thumb {
            width: 120px;
            min-width: 120px;
            height: 80px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: var(--bg-card);
        }
        @media (max-width: 639px) {
            .cms-card .cms-thumb {
                width: 80px;
                min-width: 80px;
                height: 60px;
            }
            .stat-number {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .container-page {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }
        .placeholder-thumb {
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #1A3A6A, #0B1424);
            color: var(--text-dim);
            font-size: 1.5rem;
        }
        .tag-pill {
            display: inline-block;
            padding: 0.15rem 0.6rem;
            font-size: 0.7rem;
            border-radius: 999px;
            background: rgba(212, 168, 67, 0.12);
            color: var(--secondary);
            border: 1px solid rgba(212, 168, 67, 0.15);
            font-weight: 500;
        }
        .service-icon-box {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            background: rgba(26, 109, 245, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--primary-hover);
            border: 1px solid rgba(26, 109, 245, 0.15);
        }
        .number-circle {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--secondary);
            color: #0B1424;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        ::selection {
            background: rgba(26, 109, 245, 0.3);
            color: #fff;
        }
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-deep);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--text-dim);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }

/* roulang page: article */
:root {
            --primary: #1A6DF5;
            --primary-glow: rgba(26, 109, 245, 0.4);
            --primary-hover: #4B8CFF;
            --secondary: #D4A843;
            --secondary-glow: rgba(212, 168, 67, 0.3);
            --bg-main: #0B1424;
            --bg-card: #131E33;
            --bg-dark: #060B14;
            --text-white: #FFFFFF;
            --text-body: #E8EDF5;
            --text-muted: #8A9BB5;
            --text-dim: #4A5A7A;
            --border-light: rgba(255, 255, 255, 0.06);
            --border-mid: rgba(255, 255, 255, 0.10);
            --radius-lg: 12px;
            --radius-xl: 16px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-main);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container-page {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (min-width: 768px) {
            .container-page {
                padding: 0 2rem;
            }
        }

        /* 导航样式 */
        .nav-link-active {
            color: var(--primary-hover) !important;
            position: relative;
        }
        .nav-link-active::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            box-shadow: 0 0 12px var(--primary-glow);
        }
        .desktop-nav-links a {
            transition: color 0.25s ease;
            font-size: 0.875rem;
            font-weight: 500;
        }
        .desktop-nav-links a:hover {
            color: var(--primary-hover);
        }

        /* 按钮 */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.625rem 1.5rem;
            min-height: 44px;
            font-weight: 500;
            font-size: 0.9375rem;
            border-radius: 10px;
            border: none;
            background: linear-gradient(135deg, var(--primary), var(--primary-hover));
            color: #fff;
            box-shadow: 0 0 20px var(--primary-glow);
            transition: all 0.3s ease;
            cursor: pointer;
        }
        .btn-primary:hover {
            box-shadow: 0 0 32px rgba(26, 109, 245, 0.6);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.625rem 1.5rem;
            min-height: 44px;
            font-weight: 500;
            font-size: 0.9375rem;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: transparent;
            color: #fff;
            transition: all 0.3s ease;
            cursor: pointer;
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary-hover);
            background: rgba(26, 109, 245, 0.08);
        }

        /* 输入框 */
        .form-input {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 9999px;
            color: #fff;
            padding: 0.5rem 1rem 0.5rem 2.5rem;
            font-size: 0.875rem;
            width: 100%;
            outline: none;
            transition: all 0.3s ease;
        }
        .form-input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 109, 245, 0.15);
        }
        .form-input::placeholder {
            color: var(--text-dim);
        }

        /* 搜索浮层 */
        #searchOverlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(6, 11, 20, 0.92);
            backdrop-filter: blur(24px);
            z-index: 60;
            display: none;
            align-items: flex-start;
            justify-content: center;
            padding-top: 6rem;
        }
        #searchOverlay.open {
            display: flex;
        }
        #searchOverlay .search-panel {
            width: 100%;
            max-width: 640px;
            padding: 0 1.5rem;
        }
        #searchOverlay .form-input {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.12);
            font-size: 1.125rem;
            padding: 1rem 1.25rem 1rem 3.5rem;
            border-radius: 16px;
        }

        /* 面包屑 */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.875rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: var(--primary-hover);
        }
        .breadcrumb .sep {
            color: var(--text-dim);
        }
        .breadcrumb .current {
            color: var(--text-body);
        }

        /* 文章正文排版 */
        .article-body {
            font-size: 1.0625rem;
            line-height: 1.85;
            color: var(--text-body);
        }
        .article-body h2 {
            font-size: 1.625rem;
            font-weight: 600;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            color: #fff;
            letter-spacing: -0.01em;
        }
        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            color: #fff;
        }
        .article-body p {
            margin-bottom: 1.25rem;
        }
        .article-body ul, .article-body ol {
            margin-bottom: 1.25rem;
            padding-left: 1.75rem;
        }
        .article-body li {
            margin-bottom: 0.5rem;
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            background: rgba(26, 109, 245, 0.06);
            border-radius: 0 12px 12px 0;
            color: var(--text-muted);
            font-style: italic;
        }
        .article-body code {
            background: rgba(255, 255, 255, 0.06);
            padding: 0.2em 0.5em;
            border-radius: 6px;
            font-size: 0.9em;
            color: var(--secondary);
        }
        .article-body pre {
            background: rgba(6, 11, 20, 0.7);
            padding: 1.25rem 1.5rem;
            border-radius: 12px;
            overflow-x: auto;
            margin-bottom: 1.5rem;
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .article-body pre code {
            background: none;
            padding: 0;
            color: inherit;
        }
        .article-body img {
            border-radius: 12px;
            margin: 1.5rem auto;
            max-width: 100%;
            height: auto;
        }
        .article-body a {
            color: var(--primary-hover);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body a:hover {
            color: var(--secondary);
        }

        /* 相关推荐卡片 */
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 1.25rem 1.5rem;
            border: 1px solid var(--border-light);
            transition: all 0.3s ease;
        }
        .related-card:hover {
            border-color: rgba(26, 109, 245, 0.2);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }
        .related-card h3 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            line-height: 1.5;
            margin-bottom: 0.5rem;
        }
        .related-card h3 a {
            color: #fff;
            transition: color 0.2s;
        }
        .related-card h3 a:hover {
            color: var(--primary-hover);
        }
        .related-card .meta {
            font-size: 0.8125rem;
            color: var(--text-muted);
        }

        /* 标签 */
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 0.2rem 0.7rem;
            font-size: 0.75rem;
            font-weight: 500;
            border-radius: 9999px;
            background: rgba(26, 109, 245, 0.12);
            color: var(--primary-hover);
            border: 1px solid rgba(26, 109, 245, 0.15);
        }
        .badge-gold {
            background: rgba(212, 168, 67, 0.12);
            color: var(--secondary);
            border-color: rgba(212, 168, 67, 0.15);
        }

        /* 分割线 */
        .divider-gradient {
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(26, 109, 245, 0.15), transparent);
            border: none;
            margin: 2.5rem 0;
        }

        /* 页脚链接 */
        .footer-link {
            color: var(--text-muted);
            transition: color 0.2s ease;
            font-size: 0.875rem;
        }
        .footer-link:hover {
            color: var(--primary-hover);
        }

        /* 移动端导航 */
        .mobile-menu {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(6, 11, 20, 0.96);
            backdrop-filter: blur(24px);
            z-index: 55;
            display: none;
            flex-direction: column;
            align-items: center;
            justify-content: flex-start;
            padding-top: 5rem;
            gap: 1.5rem;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            font-size: 1.25rem;
            font-weight: 500;
            color: #fff;
            padding: 0.5rem 1rem;
            transition: color 0.2s;
        }
        .mobile-menu a:hover {
            color: var(--primary-hover);
        }
        .mobile-menu .close-btn {
            position: absolute;
            top: 1.25rem;
            right: 1.5rem;
            font-size: 1.75rem;
            color: #fff;
            background: none;
            border: none;
            cursor: pointer;
        }

        @media (max-width: 1023px) {
            .desktop-nav-links {
                display: none;
            }
            .desktop-search {
                display: none;
            }
            .mobile-trigger {
                display: flex !important;
            }
        }
        @media (min-width: 1024px) {
            .mobile-trigger {
                display: none !important;
            }
            .mobile-menu {
                display: none !important;
            }
        }

        /* 响应式微调 */
        @media (max-width: 639px) {
            .article-body {
                font-size: 1rem;
            }
            .article-body h2 {
                font-size: 1.375rem;
            }
            .breadcrumb {
                font-size: 0.8125rem;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1A6DF5;
            --primary-light: #4B8CFF;
            --primary-glow: rgba(26, 109, 245, 0.4);
            --primary-glow-hover: rgba(26, 109, 245, 0.6);
            --secondary: #D4A843;
            --secondary-glow: rgba(212, 168, 67, 0.3);
            --bg-dark: #060B14;
            --bg-main: #0B1424;
            --bg-card: #131E33;
            --bg-card-alt: #182840;
            --text-white: #FFFFFF;
            --text-body: #E8EDF5;
            --text-muted: #8A9BB5;
            --text-disabled: #4A5A7A;
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-glass: rgba(255, 255, 255, 0.08);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 20px var(--primary-glow);
            --shadow-glow-hover: 0 0 32px var(--primary-glow-hover);
            --transition: all 0.25s ease;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            background: var(--bg-main);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        button {
            cursor: pointer;
        }
        ul {
            list-style: none;
            padding: 0;
        }

        /* ===== Container ===== */
        .container-page {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        @media (min-width: 768px) {
            .container-page {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        /* ===== Navigation ===== */
        .nav-link-active {
            color: var(--primary-light) !important;
            position: relative;
        }
        .nav-link-active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .desktop-nav-links a {
            transition: var(--transition);
            position: relative;
        }
        .desktop-nav-links a:hover {
            color: var(--primary-light) !important;
        }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: var(--primary);
            color: #fff;
            font-weight: 500;
            padding: 0.75rem 1.75rem;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-glow);
            transition: var(--transition);
            min-height: 44px;
            border: none;
        }
        .btn-primary:hover {
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px);
            background: #1f7aff;
        }
        .btn-primary:active {
            transform: translateY(0px);
            box-shadow: 0 0 12px rgba(26, 109, 245, 0.3);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: transparent;
            color: var(--text-white);
            font-weight: 500;
            padding: 0.75rem 1.75rem;
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: var(--transition);
            min-height: 44px;
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary-light);
            background: rgba(26, 109, 245, 0.08);
        }
        .btn-gold {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: var(--secondary);
            color: #0B1424;
            font-weight: 600;
            padding: 0.75rem 1.75rem;
            border-radius: var(--radius-md);
            box-shadow: 0 0 16px var(--secondary-glow);
            transition: var(--transition);
            min-height: 44px;
            border: none;
        }
        .btn-gold:hover {
            box-shadow: 0 0 28px rgba(212, 168, 67, 0.5);
            transform: translateY(-1px);
            background: #dbb34e;
        }

        /* ===== Glass Card ===== */
        .glass-card {
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .glass-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
            border-color: rgba(255, 255, 255, 0.12);
        }

        /* ===== Section spacing ===== */
        .section-padding {
            padding-top: 5rem;
            padding-bottom: 5rem;
        }
        @media (min-width: 768px) {
            .section-padding {
                padding-top: 6rem;
                padding-bottom: 6rem;
            }
        }
        @media (min-width: 1024px) {
            .section-padding {
                padding-top: 7rem;
                padding-bottom: 7rem;
            }
        }

        /* ===== Divider ===== */
        .divider-glow {
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(26, 109, 245, 0.2), transparent);
            margin: 3rem 0;
        }
        @media (min-width: 768px) {
            .divider-glow {
                margin: 4rem 0;
            }
        }

        /* ===== Tag / Badge ===== */
        .badge {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            font-size: 0.75rem;
            font-weight: 500;
            border-radius: 20px;
            background: rgba(26, 109, 245, 0.15);
            color: var(--primary-light);
            border: 1px solid rgba(26, 109, 245, 0.25);
            letter-spacing: 0.3px;
        }
        .badge-gold {
            background: rgba(212, 168, 67, 0.15);
            color: var(--secondary);
            border-color: rgba(212, 168, 67, 0.25);
        }

        /* ===== Data number ===== */
        .data-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--secondary);
            line-height: 1.2;
        }
        @media (min-width: 768px) {
            .data-number {
                font-size: 3.75rem;
            }
        }

        /* ===== Form Input ===== */
        .form-input {
            width: 100%;
            padding: 0.7rem 1rem;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            color: var(--text-white);
            transition: var(--transition);
            font-size: 0.95rem;
        }
        .form-input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 109, 245, 0.15);
            background: rgba(255, 255, 255, 0.08);
        }
        .form-input::placeholder {
            color: var(--text-disabled);
        }
        .form-select {
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%238A9BB5' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 1rem center;
            padding-right: 2.5rem;
        }

        /* ===== FAQ Accordion ===== */
        .faq-item {
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .faq-question {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 1.25rem 0;
            cursor: pointer;
            user-select: none;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary-light);
        }
        .faq-number {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--secondary);
            color: #0B1424;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 0 0 3.25rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 1.25rem;
        }
        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }
        .faq-icon {
            transition: transform 0.3s ease;
            margin-left: auto;
            color: var(--text-muted);
        }

        /* ===== Footer ===== */
        .footer-link {
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer-link:hover {
            color: var(--primary-light);
        }

        /* ===== Search Overlay ===== */
        .search-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(6, 11, 20, 0.94);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            z-index: 100;
            display: none;
            align-items: flex-start;
            justify-content: center;
            padding-top: 6rem;
        }
        .search-overlay.open {
            display: flex;
        }
        .search-overlay .search-inner {
            width: 100%;
            max-width: 680px;
            padding: 0 1.5rem;
        }
        .search-overlay input {
            width: 100%;
            padding: 1rem 1.25rem;
            font-size: 1.15rem;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            color: #fff;
        }
        .search-overlay input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 109, 245, 0.15);
        }
        .search-overlay .close-btn {
            position: absolute;
            top: 1.5rem;
            right: 2rem;
            color: var(--text-muted);
            font-size: 1.5rem;
            background: none;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-overlay .close-btn:hover {
            color: #fff;
        }

        /* ===== Hamburger (mobile) ===== */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.5rem;
            padding: 0.5rem;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: rgba(11, 20, 36, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            padding: 1.5rem;
            z-index: 49;
            flex-direction: column;
            gap: 1rem;
        }
        .mobile-nav.open {
            display: flex;
        }
        .mobile-nav a {
            padding: 0.6rem 0;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-body);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .mobile-nav a.nav-link-active {
            color: var(--primary-light) !important;
        }

        @media (max-width: 1023px) {
            .desktop-nav-links {
                display: none !important;
            }
            .desktop-search {
                display: none !important;
            }
            .hamburger-btn {
                display: block !important;
            }
            .mobile-cta {
                display: flex !important;
            }
        }
        @media (min-width: 1024px) {
            .mobile-nav {
                display: none !important;
            }
            .hamburger-btn {
                display: none !important;
            }
            .mobile-cta {
                display: none !important;
            }
        }

        /* ===== Hero Background ===== */
        .hero-bg {
            position: relative;
            background: radial-gradient(circle at 30% 50%, #1A3A6A 0%, #0B1424 70%);
            overflow: hidden;
        }
        .hero-bg::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image: radial-gradient(circle at 80% 20%, rgba(26, 109, 245, 0.08) 0%, transparent 60%);
            pointer-events: none;
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-main);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--text-disabled);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }

        /* ===== Focus accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* ===== Responsive extras ===== */
        @media (max-width: 640px) {
            .data-number {
                font-size: 2rem !important;
            }
            .container-page {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .section-padding {
                padding-top: 3rem;
                padding-bottom: 3rem;
            }
        }
        @media (min-width: 641px) and (max-width: 1023px) {
            .data-number {
                font-size: 2.8rem !important;
            }
        }

        /* ===== Cover image placeholder fallback ===== */
        .cover-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-md);
        }
        .cover-placeholder {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-disabled);
            font-size: 0.85rem;
            min-height: 160px;
        }

        /* ===== Step connector ===== */
        .step-connector {
            display: none;
        }
        @media (min-width: 768px) {
            .step-connector {
                display: block;
                position: absolute;
                top: 2rem;
                left: 100%;
                width: 2rem;
                height: 2px;
                background: linear-gradient(90deg, var(--primary), rgba(26, 109, 245, 0.1));
            }
        }

        /* ===== Glow border ===== */
        .glow-border {
            position: relative;
        }
        .glow-border::before {
            content: '';
            position: absolute;
            inset: -1px;
            border-radius: inherit;
            background: linear-gradient(135deg, rgba(26, 109, 245, 0.2), rgba(212, 168, 67, 0.1), rgba(26, 109, 245, 0.05));
            z-index: -1;
            opacity: 0.6;
        }

/* roulang page: category2 */
/* ========== 设计变量 ========== */
        :root {
            --primary: #1A6DF5;
            --primary-light: #4B8CFF;
            --primary-glow: rgba(26, 109, 245, 0.4);
            --primary-glow-hover: rgba(26, 109, 245, 0.6);
            --secondary: #D4A843;
            --secondary-glow: rgba(212, 168, 67, 0.3);
            --bg-deep: #060B14;
            --bg-dark: #0B1424;
            --bg-card: #131E33;
            --bg-glass: rgba(255, 255, 255, 0.04);
            --bg-glass-hover: rgba(255, 255, 255, 0.08);
            --border-glass: rgba(255, 255, 255, 0.06);
            --border-glass-hover: rgba(255, 255, 255, 0.12);
            --text-white: #FFFFFF;
            --text-body: #E8EDF5;
            --text-muted: #8A9BB5;
            --text-disabled: #4A5A7A;
            --success: #34C759;
            --warning: #FF9500;
            --error: #FF3B30;
            --info: #5AC8FA;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 8px 32px rgba(0,0,0,0.3);
            --shadow-glow: 0 0 20px var(--primary-glow);
            --shadow-glow-hover: 0 0 32px var(--primary-glow-hover);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
        }

        /* ========== Reset / Base ========== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-body);
            line-height: 1.7;
            min-height: 100vh;
        }
        a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; outline: none; }
        button { cursor: pointer; border: none; background: none; }
        ul { list-style: none; }
        hr { border: none; height: 1px; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.06), transparent); margin: 3rem 0; }

        /* ========== 容器 ========== */
        .container-page {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        @media (min-width: 768px) {
            .container-page { padding-left: 2rem; padding-right: 2rem; }
        }

        /* ========== 导航 ========== */
        .desktop-nav-links a {
            position: relative;
            padding-bottom: 2px;
        }
        .desktop-nav-links a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.25s ease;
        }
        .desktop-nav-links a:hover::after,
        .desktop-nav-links a.nav-link-active::after {
            width: 100%;
        }
        .nav-link-active {
            color: var(--primary-light) !important;
        }
        .desktop-nav-links a:not(.nav-link-active) {
            color: #cbd5e1;
        }
        .desktop-nav-links a:not(.nav-link-active):hover {
            color: var(--primary-light);
        }

        /* 搜索覆盖层 */
        #searchOverlay {
            position: fixed;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(6,11,20,0.88);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            z-index: 60;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: flex-start;
            padding-top: 5rem;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s ease;
        }
        #searchOverlay.open {
            opacity: 1;
            visibility: visible;
        }
        #searchOverlay .search-inner {
            max-width: 600px;
            width: 90%;
        }
        #searchOverlay input {
            width: 100%;
            padding: 1rem 1.25rem;
            border-radius: var(--radius-lg);
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(255,255,255,0.1);
            color: white;
            font-size: 1.125rem;
        }
        #searchOverlay input::placeholder { color: var(--text-disabled); }
        #searchOverlay input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,109,245,0.2); }

        /* ========== 按钮 ========== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            min-height: 44px;
            padding: 0.625rem 1.75rem;
            border-radius: var(--radius-md);
            font-weight: 500;
            font-size: 0.9375rem;
            color: white;
            background: var(--primary);
            box-shadow: var(--shadow-glow);
            transition: all 0.25s ease;
        }
        .btn-primary:hover {
            background: #1557D0;
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px);
        }
        .btn-primary:active { transform: translateY(0); }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            min-height: 44px;
            padding: 0.625rem 1.75rem;
            border-radius: var(--radius-md);
            font-weight: 500;
            font-size: 0.9375rem;
            color: var(--text-white);
            border: 1px solid rgba(255,255,255,0.15);
            background: transparent;
            transition: all 0.25s ease;
        }
        .btn-outline:hover {
            border-color: var(--primary);
            background: rgba(26,109,245,0.08);
            transform: translateY(-1px);
        }

        /* ========== 卡片 ========== */
        .card-glass {
            background: var(--bg-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }
        .card-glass:hover {
            background: var(--bg-glass-hover);
            border-color: var(--border-glass-hover);
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0,0,0,0.4);
        }
        .card-solid {
            background: var(--bg-card);
            border: 1px solid rgba(255,255,255,0.04);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: all 0.25s ease;
        }
        .card-solid:hover {
            border-color: rgba(255,255,255,0.08);
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(0,0,0,0.35);
        }

        /* ========== 统计数字 ========== */
        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--secondary);
            line-height: 1.1;
        }
        @media (min-width: 768px) {
            .stat-number { font-size: 3.75rem; }
        }

        /* ========== 标签 / Badge ========== */
        .badge {
            display: inline-block;
            padding: 0.2rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(26,109,245,0.15);
            color: var(--primary-light);
            border: 1px solid rgba(26,109,245,0.15);
        }
        .badge-gold {
            background: rgba(212,168,67,0.15);
            color: var(--secondary);
            border-color: rgba(212,168,67,0.15);
        }

        /* ========== FAQ 手风琴 ========== */
        .faq-item {
            border-bottom: 1px solid rgba(255,255,255,0.04);
            padding: 1.25rem 0;
        }
        .faq-item:first-child { padding-top: 0; }
        .faq-question {
            display: flex;
            align-items: center;
            gap: 1rem;
            cursor: pointer;
            user-select: none;
            padding: 0.5rem 0;
        }
        .faq-number {
            flex-shrink: 0;
            width: 36px; height: 36px;
            border-radius: 50%;
            background: var(--secondary);
            color: var(--bg-deep);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.875rem;
        }
        .faq-question h3 {
            flex: 1;
            font-size: 1.0625rem;
            font-weight: 500;
            color: var(--text-white);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 24px; height: 24px;
            color: var(--text-muted);
            transition: transform 0.3s ease;
        }
        .faq-item.open .faq-icon { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding-left: 3.25rem;
            color: var(--text-muted);
            font-size: 0.9375rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding-top: 0.75rem;
            padding-bottom: 0.25rem;
        }

        /* ========== 分割线 ========== */
        .divider-glow {
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(26,109,245,0.2), transparent);
            margin: 3rem 0;
        }

        /* ========== 表单 ========== */
        .form-input {
            width: 100%;
            padding: 0.75rem 1rem;
            border-radius: var(--radius-md);
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.08);
            color: white;
            transition: border-color 0.2s, box-shadow 0.2s;
        }
        .form-input::placeholder { color: var(--text-disabled); }
        .form-input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26,109,245,0.15);
        }
        .form-input option { background: var(--bg-card); color: white; }
        textarea.form-input { min-height: 100px; resize: vertical; }

        /* ========== 页脚链接 ========== */
        .footer-link {
            color: var(--text-muted);
            transition: color 0.2s ease;
        }
        .footer-link:hover {
            color: var(--primary-light);
        }

        /* ========== 移动端导航 ========== */
        .mobile-menu {
            position: fixed;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(6,11,20,0.96);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            z-index: 55;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 1.5rem;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s ease;
        }
        .mobile-menu.open { opacity: 1; visibility: visible; }
        .mobile-menu a {
            font-size: 1.25rem;
            font-weight: 500;
            color: var(--text-body);
            padding: 0.5rem 0;
        }
        .mobile-menu a.nav-link-active { color: var(--primary-light); }

        /* ========== Hero 背景 ========== */
        .hero-bg {
            position: relative;
            background: radial-gradient(circle at 30% 50%, #1A3A6A 0%, #0B1424 70%);
            overflow: hidden;
        }
        .hero-bg::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11,20,36,0.3) 0%, rgba(11,20,36,0.9) 100%);
            pointer-events: none;
        }
        .hero-bg > * { position: relative; z-index: 2; }

        /* ========== 响应式辅助 ========== */
        @media (max-width: 1023px) {
            .desktop-nav-links { display: none; }
            .desktop-search { display: none !important; }
            .mobile-menu-toggle { display: flex !important; }
        }
        @media (min-width: 1024px) {
            .mobile-menu-toggle { display: none !important; }
            .mobile-menu { display: none !important; }
        }
        @media (max-width: 639px) {
            .stat-number { font-size: 2rem; }
            .container-page { padding-left: 1rem; padding-right: 1rem; }
        }

        /* ========== 滚动条美化 ========== */
        ::-webkit-scrollbar { width: 6px; }
        ::-webkit-scrollbar-track { background: var(--bg-dark); }
        ::-webkit-scrollbar-thumb { background: #2a3a5a; border-radius: 3px; }
        ::-webkit-scrollbar-thumb:hover { background: #3a4a6a; }

        /* ========== 动画 ========== */
        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(24px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .animate-fade-up {
            animation: fadeInUp 0.6s ease forwards;
        }
        .delay-200 { animation-delay: 0.2s; }
        .delay-400 { animation-delay: 0.4s; }
        .delay-600 { animation-delay: 0.6s; }

/* roulang page: category3 */
:root {
            --primary: #1A6DF5;
            --primary-dark: #1554C4;
            --secondary: #D4A843;
            --bg-deep: #060B14;
            --bg-main: #0B1424;
            --bg-card: #131E33;
            --text-main: #E8EDF5;
            --text-muted: #8A9BB5;
            --text-dim: #4A5A7A;
            --border-subtle: rgba(255, 255, 255, 0.06);
            --radius-card: 12px;
            --radius-btn: 8px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --glow-blue: 0 0 20px rgba(26, 109, 245, 0.4);
            --glow-gold: 0 0 20px rgba(212, 168, 67, 0.3);
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            background: var(--bg-main);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s;
        }

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

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

        input:focus,
        select:focus,
        textarea:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .container-page {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.625rem 1.5rem;
            min-height: 44px;
            font-size: 0.9375rem;
            font-weight: 500;
            border-radius: var(--radius-btn);
            background: var(--primary);
            color: #fff;
            border: none;
            cursor: pointer;
            transition: all 0.25s;
            box-shadow: var(--glow-blue);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 0 32px rgba(26, 109, 245, 0.6);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 16px rgba(26, 109, 245, 0.3);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.625rem 1.5rem;
            min-height: 44px;
            font-size: 0.9375rem;
            font-weight: 500;
            border-radius: var(--radius-btn);
            background: transparent;
            color: var(--text-main);
            border: 1px solid rgba(255, 255, 255, 0.15);
            cursor: pointer;
            transition: all 0.25s;
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            color: #fff;
            background: rgba(26, 109, 245, 0.08);
        }

        .footer-link {
            color: var(--text-muted);
            transition: color 0.2s;
        }

        .footer-link:hover {
            color: var(--primary);
        }

        .glass-card {
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
        }

        .glass-card:hover {
            border-color: rgba(255, 255, 255, 0.1);
        }

        .data-value {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--secondary);
            line-height: 1.2;
        }

        @media (min-width: 768px) {
            .data-value {
                font-size: 3.75rem;
            }
        }

        .badge-gold {
            display: inline-flex;
            align-items: center;
            padding: 0.125rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(212, 168, 67, 0.15);
            color: var(--secondary);
            border: 1px solid rgba(212, 168, 67, 0.2);
        }

        .badge-blue {
            display: inline-flex;
            align-items: center;
            padding: 0.125rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(26, 109, 245, 0.12);
            color: #7BB0FF;
            border: 1px solid rgba(26, 109, 245, 0.2);
        }

        .section-divider {
            height: 1px;
            background: linear-gradient(to right, transparent, rgba(26, 109, 245, 0.2), transparent);
            margin: 3rem 0;
        }

        .faq-item summary {
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.25rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: color 0.2s;
        }

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

        .faq-item summary .faq-arrow {
            transition: transform 0.3s;
            color: var(--secondary);
            flex-shrink: 0;
        }

        .faq-item[open] summary .faq-arrow {
            transform: rotate(180deg);
        }

        .faq-item[open] summary {
            border-bottom-color: rgba(212, 168, 67, 0.2);
        }

        .faq-item .faq-answer {
            padding: 0.75rem 0 1.5rem 0;
            color: var(--text-muted);
            font-size: 0.9375rem;
            line-height: 1.7;
        }

        .faq-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2rem;
            height: 2rem;
            border-radius: 50%;
            background: var(--secondary);
            color: #fff;
            font-size: 0.8125rem;
            font-weight: 600;
            flex-shrink: 0;
        }

        .nav-link-active {
            color: #60A5FA;
        }

        .nav-link-active::after {
            content: '';
            display: block;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
            margin-top: 2px;
            width: 100%;
        }

        .search-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(6, 11, 20, 0.92);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            z-index: 100;
            display: none;
            align-items: flex-start;
            justify-content: center;
            padding-top: 6rem;
        }

        .search-overlay.open {
            display: flex;
        }

        .search-overlay .search-inner {
            width: 90%;
            max-width: 600px;
        }

        .search-overlay input {
            width: 100%;
            padding: 1rem 1.25rem;
            font-size: 1.25rem;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            color: #fff;
        }

        .search-overlay input::placeholder {
            color: var(--text-dim);
        }

        .search-overlay .close-btn {
            position: absolute;
            top: 2rem;
            right: 2rem;
            color: var(--text-muted);
            font-size: 1.5rem;
            cursor: pointer;
            background: none;
            border: none;
        }

        .search-overlay .close-btn:hover {
            color: #fff;
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(6, 11, 20, 0.96);
            z-index: 90;
            padding: 5rem 2rem 2rem;
            flex-direction: column;
            gap: 1.5rem;
        }

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

        .mobile-nav a {
            font-size: 1.125rem;
            font-weight: 500;
            padding: 0.75rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            color: var(--text-muted);
            transition: color 0.2s;
        }

        .mobile-nav a:hover,
        .mobile-nav a.active {
            color: #60A5FA;
        }

        @media (max-width: 1023px) {
            .desktop-nav-links,
            .desktop-search {
                display: none !important;
            }
            .mobile-toggle {
                display: flex !important;
            }
            .hero-title {
                font-size: 2.25rem !important;
            }
            .hero-sub {
                font-size: 1rem !important;
            }
        }

        @media (min-width: 1024px) {
            .mobile-toggle {
                display: none !important;
            }
            .mobile-nav {
                display: none !important;
            }
        }

        @media (max-width: 639px) {
            .container-page {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .data-value {
                font-size: 2rem !important;
            }
            .hero-title {
                font-size: 1.75rem !important;
            }
            .hero-sub {
                font-size: 0.9375rem !important;
            }
        }

        .step-card .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 50%;
            background: rgba(26, 109, 245, 0.15);
            color: var(--primary);
            font-weight: 700;
            font-size: 1.125rem;
            border: 1px solid rgba(26, 109, 245, 0.2);
            flex-shrink: 0;
        }

        .hover-lift {
            transition: transform 0.25s, box-shadow 0.25s;
        }

        .hover-lift:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
        }

        .scene-icon {
            width: 3rem;
            height: 3rem;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(26, 109, 245, 0.1);
            color: var(--primary);
            flex-shrink: 0;
        }

        ::selection {
            background: rgba(26, 109, 245, 0.3);
            color: #fff;
        }

        .hero-bg-gradient {
            background: radial-gradient(circle at 30% 50%, #1A3A6A 0%, #0B1424 70%);
        }