/* roulang page: index */
:root {
            --primary: #1e3a5f;
            --accent: #d4a853;
            --deep: #0f1e2e;
            --soft: #f5f5f4;
            --text: #1a2330;
            --text-light: #5b6776;
            --border: #e5e2db;
            --radius: 16px;
            --shadow: 0 4px 20px rgba(15, 30, 46, 0.08);
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            color: var(--text);
            background: #ffffff;
            line-height: 1.6;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            line-height: 1.4;
            border: 2px solid transparent;
            cursor: pointer;
            transition: all .3s ease;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--deep);
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background: transparent;
            color: var(--accent);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(212, 168, 83, .25);
        }
        .btn-outline {
            background: transparent;
            color: var(--accent);
            border-color: var(--accent);
        }
        .btn-outline:hover {
            background: var(--accent);
            color: var(--deep);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(212, 168, 83, .25);
        }
        .card-hover {
            transition: all .3s ease;
        }
        .card-hover:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(15, 30, 46, 0.12);
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--deep);
            letter-spacing: -0.02em;
            margin: 0 0 12px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-light);
            margin: 0 0 40px;
        }
        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(212, 168, 83, 0.12);
            color: var(--accent);
        }
        .nav-link {
            position: relative;
            padding: 8px 0;
            font-weight: 500;
            color: var(--text-light);
            transition: color .2s ease;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link.active {
            color: var(--primary);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .mobile-menu {
            transition: all .3s ease;
            max-height: 0;
            overflow: hidden;
        }
        .mobile-menu.open {
            max-height: 400px;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 24px;
            background: #fff;
            transition: all .3s ease;
        }
        .faq-item:hover {
            border-color: var(--accent);
            box-shadow: 0 4px 20px rgba(212, 168, 83, 0.08);
        }
        .hero-pattern {
            background-image: linear-gradient(135deg, rgba(15, 30, 46, 0.95) 0%, rgba(30, 58, 95, 0.85) 100%), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
        }
        .category-card {
            position: relative;
            overflow: hidden;
            border-radius: 20px;
            background: #fff;
            border: 1px solid var(--border);
        }
        .category-card img {
            transition: transform .5s ease;
        }
        .category-card:hover img {
            transform: scale(1.05);
        }
        .footer-link {
            color: rgba(255, 255, 255, 0.7);
            transition: color .2s ease;
        }
        .footer-link:hover {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 26px;
            }
            .desktop-nav {
                display: none;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .btn {
                padding: 12px 24px;
                font-size: 14px;
            }
        }
        @media (min-width: 769px) {
            .mobile-menu-btn {
                display: none;
            }
            .mobile-menu {
                display: none;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2557e6;
            --accent: #f5a93a;
            --deep: #0e1a2b;
            --bg: #f7f9fc;
            --surface: #ffffff;
            --text: #1c2b3a;
            --text-weak: #6b7b90;
            --border: #e2eaf2;
            --radius: 1rem;
            --shadow: 0 16px 48px -16px rgba(14, 26, 43, 0.12);
            --shadow-hover: 0 24px 64px -20px rgba(14, 26, 43, 0.22);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .desktop-nav .nav-link {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: #44566b;
            padding: 6px 2px;
            transition: color 0.25s ease;
        }
        .desktop-nav .nav-link:hover {
            color: var(--primary);
        }
        .desktop-nav .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .desktop-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            right: 0;
            height: 3px;
            border-radius: 4px;
            background: var(--accent);
        }
        .mobile-menu {
            display: none;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .mobile-menu.open {
            display: block;
            max-height: 400px;
        }
        .badge-primary {
            background: rgba(37, 87, 230, 0.08);
            color: var(--primary);
            border: 1px solid rgba(37, 87, 230, 0.16);
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 13px;
            display: inline-block;
        }
        .badge-accent {
            background: rgba(245, 169, 58, 0.1);
            color: #b97c12;
            border: 1px solid rgba(245, 169, 58, 0.25);
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 13px;
            display: inline-block;
        }
        .section-title {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            color: var(--deep);
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-weak);
            max-width: 560px;
            line-height: 1.7;
        }
        .card-surface {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .card-surface:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 12px 28px;
            border-radius: 14px;
            font-weight: 600;
            font-size: 15px;
            border: none;
            transition: background 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease;
            box-shadow: 0 8px 24px -8px rgba(37, 87, 230, 0.45);
        }
        .btn-primary:hover {
            background: #1b46c9;
            transform: translateY(-2px);
            box-shadow: 0 12px 32px -10px rgba(37, 87, 230, 0.55);
        }
        .btn-primary:focus-visible {
            outline: 3px solid rgba(37, 87, 230, 0.4);
            outline-offset: 2px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--deep);
            padding: 12px 28px;
            border-radius: 14px;
            font-weight: 600;
            font-size: 15px;
            border: 1.5px solid #cbd5e1;
            transition: border-color 0.25s ease, background 0.25s ease, color 0.25s ease;
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(37, 87, 230, 0.03);
        }
        .step-card {
            counter-increment: step;
            position: relative;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 18px;
            padding: 40px 28px 28px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .step-card::before {
            content: counter(step, decimal-leading-zero);
            position: absolute;
            top: -16px;
            left: 24px;
            background: var(--primary);
            color: #fff;
            font-size: 13px;
            font-weight: 800;
            padding: 4px 14px;
            border-radius: 999px;
            letter-spacing: 0.05em;
            box-shadow: 0 4px 12px rgba(37, 87, 230, 0.32);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: 16px;
            background: var(--surface);
            overflow: hidden;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
        }
        .faq-item:hover {
            border-color: rgba(37, 87, 230, 0.2);
            box-shadow: 0 6px 24px -8px rgba(37, 87, 230, 0.08);
        }
        .faq-toggle {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            padding: 20px 24px;
            background: transparent;
            border: none;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--deep);
            gap: 16px;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            padding: 0 24px;
        }
        .faq-answer-inner {
            padding-bottom: 20px;
            color: var(--text-weak);
            font-size: 14.5px;
            line-height: 1.8;
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }
        .faq-item.active .faq-answer {
            max-height: 320px;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }
        .faq-icon {
            transition: transform 0.3s ease;
            color: var(--primary);
            flex-shrink: 0;
        }
        .stat-card {
            text-align: center;
            padding: 36px 20px;
            background: var(--surface);
            border-radius: 18px;
            border: 1px solid var(--border);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .stat-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            letter-spacing: -0.03em;
        }
        .hero-pattern {
            background-image: linear-gradient(rgba(14, 26, 43, 0.76), rgba(14, 26, 43, 0.86)), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
        }
        .cta-pattern {
            background-image: linear-gradient(120deg, rgba(14, 26, 43, 0.92), rgba(37, 87, 230, 0.88)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
        }
        .section-bg-soft {
            background: linear-gradient(180deg, #ffffff 0%, #f2f6fc 100%);
        }
        .footer-link {
            color: rgba(255, 255, 255, 0.55);
            transition: color 0.2s ease;
        }
        .footer-link:hover {
            color: var(--accent);
        }
        .content-card-img {
            border-radius: 14px;
            overflow: hidden;
            position: relative;
        }
        .content-card-img img {
            transition: transform 0.45s ease;
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .content-card:hover .content-card-img img {
            transform: scale(1.06);
        }
        .entry-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            background: rgba(37, 87, 230, 0.08);
            color: var(--primary);
        }
        @media (min-width: 769px) {
            .mobile-menu-btn {
                display: none !important;
            }
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none !important;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .section-title {
                font-size: 26px;
            }
            .stat-number {
                font-size: 32px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }
            .section-title {
                font-size: 23px;
            }
            .btn-primary,
            .btn-outline {
                padding: 10px 20px;
                font-size: 14px;
                width: 100%;
                justify-content: center;
            }
            .hero-title {
                font-size: 34px;
                line-height: 1.2;
            }
        }

/* roulang page: article */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --deep: #0f172a;
            --bg: #f8fafc;
            --text: #1e293b;
            --muted: #64748b;
            --border: #e2e8f0;
            --radius-sm: 8px;
            --radius: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

        button {
            cursor: pointer;
            font: inherit;
            border: none;
            background: none;
            color: inherit;
        }

        input,
        textarea {
            font: inherit;
        }

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 导航 ===== */
        .nav-link {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            padding: 10px 6px;
            transition: var(--transition);
            border-radius: 6px;
        }

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

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

        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            bottom: 0;
            width: 24px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }

        .mobile-menu-btn {
            display: none;
            align-items: center;
            justify-content: center;
        }

        .mobile-menu {
            display: none;
        }

        .mobile-menu.open {
            display: block;
        }

        @media (max-width: 768px) {
            .desktop-nav {
                display: none !important;
            }

            .mobile-menu-btn {
                display: flex;
            }
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: 12px;
            transition: var(--transition);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: 2px solid var(--border);
            color: var(--text);
            font-weight: 600;
            font-size: 15px;
            padding: 10px 26px;
            border-radius: 12px;
            background: #fff;
            transition: var(--transition);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }

        .btn-white-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: 2px solid rgba(255, 255, 255, 0.6);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 10px 26px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.1);
            transition: var(--transition);
            backdrop-filter: blur(4px);
        }

        .btn-white-outline:hover {
            background: rgba(255, 255, 255, 0.2);
            border-color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 徽章 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #eff6ff;
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 999px;
        }

        .badge-accent {
            background: #fef3c7;
            color: #b45309;
        }

        /* ===== 页面 Banner ===== */
        .page-banner {
            position: relative;
            padding: 64px 0 72px;
            overflow: hidden;
            background-color: var(--deep);
        }

        .page-banner .banner-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.9;
        }

        .page-banner .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(15, 23, 42, 0.72) 50%, rgba(37, 99, 235, 0.35) 100%);
        }

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

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 16px;
        }

        .breadcrumb-nav a {
            color: rgba(255, 255, 255, 0.6);
            transition: color 0.3s;
        }

        .breadcrumb-nav a:hover {
            color: var(--accent);
        }

        .breadcrumb-nav .breadcrumb-current {
            color: var(--accent);
        }

        /* ===== 文章正文 ===== */
        .article-card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            padding: 40px 48px;
        }

        @media (max-width: 768px) {
            .article-card {
                padding: 24px 20px;
            }
        }

        .article-meta-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            margin-bottom: 32px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border);
        }

        .article-meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--muted);
        }

        .article-body {
            font-size: 16px;
            line-height: 1.9;
            color: #334155;
        }

        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--deep);
            margin: 40px 0 16px;
            padding-left: 16px;
            border-left: 4px solid var(--primary);
            border-radius: 4px;
        }

        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--deep);
            margin: 28px 0 12px;
        }

        .article-body h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--deep);
            margin: 22px 0 10px;
        }

        .article-body p {
            margin-bottom: 20px;
        }

        .article-body ul {
            margin: 16px 0 20px;
            padding-left: 28px;
            list-style: disc;
        }

        .article-body ol {
            margin: 16px 0 20px;
            padding-left: 28px;
            list-style: decimal;
        }

        .article-body li {
            margin-bottom: 8px;
        }

        .article-body li::marker {
            color: var(--primary);
        }

        .article-body img {
            border-radius: var(--radius);
            margin: 24px 0;
            box-shadow: var(--shadow);
        }

        .article-body blockquote {
            border-left: 4px solid var(--accent);
            background: #fffbeb;
            padding: 16px 24px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
            color: var(--text);
            font-style: italic;
        }

        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-body a:hover {
            color: var(--primary-dark);
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 15px;
        }

        .article-body th,
        .article-body td {
            border: 1px solid var(--border);
            padding: 10px 16px;
            text-align: left;
        }

        .article-body th {
            background: #f1f5f9;
            font-weight: 600;
            color: var(--deep);
        }

        .article-body hr {
            border: none;
            border-top: 1px solid var(--border);
            margin: 32px 0;
        }

        .article-body strong {
            color: var(--deep);
            font-weight: 700;
        }

        .article-body code {
            background: #f1f5f9;
            padding: 2px 8px;
            border-radius: 4px;
            font-family: 'Fira Code', monospace;
            font-size: 14px;
            color: var(--primary-dark);
        }

        .article-body pre {
            background: var(--deep);
            color: #e2e8f0;
            padding: 20px 24px;
            border-radius: var(--radius);
            overflow-x: auto;
            margin: 24px 0;
            line-height: 1.6;
        }

        .article-body pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }

        /* 空状态 */
        .empty-state {
            text-align: center;
            padding: 64px 24px;
        }

        .empty-icon {
            width: 80px;
            height: 80px;
            background: #f1f5f9;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
            font-size: 32px;
            color: var(--muted);
        }

        /* ===== 服务卡片 ===== */
        .service-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .service-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }

        .service-card .card-img {
            overflow: hidden;
            position: relative;
        }

        .service-card .card-img img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .service-card .card-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            margin-bottom: 14px;
        }

        .service-card .card-icon.blue {
            background: #eff6ff;
            color: var(--primary);
        }

        .service-card .card-icon.green {
            background: #ecfdf5;
            color: #10b981;
        }

        .service-card .card-icon.amber {
            background: #fef3c7;
            color: #d97706;
        }

        .service-card .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .service-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--deep);
            margin-bottom: 8px;
        }

        .service-card p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            flex: 1;
        }

        .service-card .card-link {
            margin-top: 16px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .service-card .card-link:hover {
            color: var(--primary-dark);
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: #fff;
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow);
            border-color: var(--primary-light);
            transform: translateX(4px);
        }

        .faq-item h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--deep);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .faq-item h3 i {
            color: var(--primary);
            flex-shrink: 0;
        }

        .faq-item p {
            font-size: 14px;
            color: var(--muted);
            margin-top: 10px;
            line-height: 1.7;
            padding-left: 26px;
        }

        /* ===== CTA ===== */
        .cta-banner {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-lg);
            padding: 64px 40px;
            text-align: center;
        }

        .cta-banner .cta-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
        }

        .cta-banner .cta-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(15, 23, 42, 0.68));
        }

        .cta-banner .cta-content {
            position: relative;
            z-index: 2;
        }

        @media (max-width: 768px) {
            .cta-banner {
                padding: 40px 24px;
            }
        }

        /* ===== 页脚 ===== */
        .footer-link {
            color: rgba(255, 255, 255, 0.6);
            transition: color 0.3s;
        }

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

        /* ===== 焦点状态 ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 3px;
            border-radius: 6px;
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }

            .article-card {
                padding: 32px 28px;
            }
        }

        @media (max-width: 640px) {
            .page-banner {
                padding: 48px 0 56px;
            }

            .article-body {
                font-size: 15px;
                line-height: 1.85;
            }

            .article-body h2 {
                font-size: 20px;
                margin: 30px 0 14px;
            }

            .article-body h3 {
                font-size: 18px;
            }

            .article-body table {
                font-size: 13px;
            }

            .article-body th,
            .article-body td {
                padding: 8px 12px;
            }

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

            .faq-item {
                padding: 18px 16px;
            }

            .faq-item p {
                padding-left: 0;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1e3a5f;
            --accent: #d97706;
            --deep: #0f172a;
            --bg-light: #f8fafc;
            --border: #e2e8f0;
            --text-body: #334155;
            --text-weak: #64748b;
            --radius: 1rem;
            --shadow-card: 0 4px 20px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 12px 36px rgba(15, 23, 42, 0.12);
            --transition: all 0.25s ease;
        }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            color: var(--text-body);
            background: #fff;
            line-height: 1.7;
        }
        .container {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        @media (min-width: 768px) {
            .container {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        /* ===== 导航 ===== */
        .desktop-nav {
            display: none;
            align-items: center;
        }
        .nav-link {
            position: relative;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--deep);
            padding: 0.5rem 0;
            letter-spacing: 0.02em;
            transition: color 0.2s, opacity 0.2s;
        }
        .nav-link:hover {
            color: var(--accent);
        }
        .nav-link.active {
            color: var(--accent);
            font-weight: 700;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -3px;
            height: 3px;
            border-radius: 3px;
            background: var(--accent);
        }
        .mobile-menu-btn {
            display: flex;
        }
        .mobile-menu {
            display: none;
        }
        .mobile-menu.open {
            display: block;
        }
        @media (min-width: 768px) {
            .desktop-nav {
                display: flex;
            }
            .mobile-menu-btn {
                display: none;
            }
            .mobile-menu {
                display: none !important;
            }
        }
        @media (max-width: 640px) {
            .nav-link {
                font-size: 0.875rem;
            }
        }
        /* ===== 页脚链接 ===== */
        .footer-link {
            color: rgba(255, 255, 255, 0.6);
            transition: color 0.2s;
        }
        .footer-link:hover {
            color: var(--accent);
        }
        /* ===== 卡片 hover ===== */
        .card-lift {
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }
        .card-lift:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        /* ===== FAQ ===== */
        .faq-answer {
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-question i.fa-chevron-down {
            transform: rotate(180deg);
        }
        .faq-question i.fa-chevron-down {
            transition: transform 0.3s ease;
        }
        /* ===== 输入框 focus ===== */
        .input-focus {
            transition: border 0.2s, box-shadow 0.2s;
        }
        .input-focus:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.15);
            outline: none;
        }
        /* ===== 图片遮罩 ===== */
        .img-mask {
            position: relative;
            overflow: hidden;
        }
        .img-mask::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(15, 23, 42, 0.35) 100%);
            pointer-events: none;
        }
        /* ===== 节标题 ===== */
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            color: var(--accent);
            font-size: 0.875rem;
            font-weight: 600;
            letter-spacing: 0.12em;
            text-transform: uppercase;
        }
        .section-tag::after {
            content: '';
            display: block;
            width: 2.2rem;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        /* ===== 流程步骤线 ===== */
        .step-line {
            position: relative;
        }
        .step-line::before {
            content: '';
            position: absolute;
            top: 2.5rem;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0.15;
            z-index: 0;
        }
        @media (max-width: 1023px) {
            .step-line::before {
                display: none;
            }
        }

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1e3a5f;
            --primary-soft: #e8eef6;
            --accent: #f0a500;
            --accent-soft: #fef3c7;
            --deep: #0f172a;
            --body: #334155;
            --muted: #64748b;
            --border: #e2e8f0;
            --bg-soft: #f8fafc;
            --radius: 1rem;
            --radius-lg: 1.5rem;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, .06);
            --shadow-md: 0 6px 16px rgba(15, 23, 42, .08);
            --shadow-lg: 0 16px 40px rgba(15, 23, 42, .12);
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            color: var(--body);
            background: #fff;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        button {
            border: none;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }
        input,
        textarea,
        select {
            font-family: inherit;
        }
        :focus-visible {
            outline: 3px solid rgba(240, 165, 0, .45);
            outline-offset: 2px;
        }

        /* ===== 容器 ===== */
        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 640px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== 导航 ===== */
        .desktop-nav {
            display: none;
        }
        .mobile-menu-btn {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .mobile-menu {
            display: none;
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease;
        }
        .mobile-menu.open {
            display: block;
            max-height: 500px;
        }
        .nav-link {
            position: relative;
            font-weight: 500;
            font-size: .95rem;
            color: var(--muted);
            padding: .5rem 0;
            transition: color .2s ease;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--accent);
            transition: width .25s ease;
        }
        .nav-link:hover {
            color: var(--deep);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--deep);
            font-weight: 700;
        }
        .nav-link.active::after {
            width: 100%;
        }
        @media (min-width: 768px) {
            .desktop-nav {
                display: flex;
            }
            .mobile-menu-btn {
                display: none;
            }
            .mobile-menu {
                display: none !important;
            }
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            background: var(--accent);
            color: var(--deep);
            font-weight: 600;
            font-size: .95rem;
            padding: .875rem 1.75rem;
            border-radius: .75rem;
            box-shadow: 0 4px 14px rgba(240, 165, 0, .32);
            transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(240, 165, 0, .4);
            filter: brightness(1.04);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            border: 1px solid rgba(255, 255, 255, .35);
            color: #fff;
            font-weight: 600;
            font-size: .95rem;
            padding: .875rem 1.75rem;
            border-radius: .75rem;
            background: rgba(255, 255, 255, .06);
            backdrop-filter: blur(4px);
            transition: all .2s ease;
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, .12);
            border-color: rgba(255, 255, 255, .65);
            transform: translateY(-2px);
        }
        .btn-ghost:active {
            transform: translateY(0);
        }

        /* ===== 板块标题 ===== */
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            background: var(--accent-soft);
            color: #b45309;
            font-weight: 600;
            font-size: .85rem;
            padding: .4rem 1rem;
            border-radius: 999px;
            letter-spacing: .02em;
        }
        .section-title {
            font-size: 2rem;
            line-height: 1.25;
            font-weight: 700;
            color: var(--deep);
            letter-spacing: -0.01em;
        }
        .section-title.text-white {
            color: #fff;
        }
        .text-muted {
            color: var(--muted);
        }
        @media (max-width: 640px) {
            .section-title {
                font-size: 1.5rem;
            }
        }

        /* ===== 统计卡 ===== */
        .stat-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 2.25rem 1.25rem;
            text-align: center;
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
        }
        .stat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(240, 165, 0, .3);
        }
        .stat-icon {
            width: 3.5rem;
            height: 3.5rem;
            margin: 0 auto 1rem;
            background: var(--primary-soft);
            color: var(--primary);
            border-radius: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            transition: background .25s, transform .25s;
        }
        .stat-card:hover .stat-icon {
            background: var(--primary);
            color: var(--accent);
            transform: scale(1.05);
        }

        /* ===== 功能卡片 ===== */
        .feature-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 100%;
            transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(240, 165, 0, .3);
        }
        .feature-card-img {
            height: 190px;
            overflow: hidden;
            position: relative;
        }
        .feature-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .feature-card:hover .feature-card-img img {
            transform: scale(1.05);
        }
        .feature-card-icon {
            position: absolute;
            left: 1.25rem;
            bottom: -1.25rem;
            width: 3.25rem;
            height: 3.25rem;
            background: var(--primary);
            color: var(--accent);
            border-radius: .875rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            box-shadow: var(--shadow-md);
            border: 3px solid #fff;
        }

        /* ===== 标签徽章 ===== */
        .badge {
            display: inline-block;
            background: var(--bg-soft);
            color: var(--primary);
            font-size: .78rem;
            font-weight: 600;
            padding: .28rem .8rem;
            border-radius: 999px;
            border: 1px solid var(--border);
            transition: all .2s ease;
        }
        .badge:hover {
            background: var(--primary-soft);
            border-color: rgba(30, 58, 95, .25);
        }

        /* ===== 流程步骤 ===== */
        .step-card {
            position: relative;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 2.25rem 1.5rem 1.75rem;
            text-align: center;
            height: 100%;
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(240, 165, 0, .3);
        }
        .step-num {
            position: absolute;
            top: .75rem;
            right: 1.25rem;
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-soft);
            line-height: 1;
            z-index: 1;
        }
        .step-dot {
            position: relative;
            width: 3.5rem;
            height: 3.5rem;
            margin: 0 auto 1.25rem;
            background: var(--primary);
            color: #fff;
            border-radius: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            box-shadow: 0 0 0 6px var(--primary-soft);
            z-index: 2;
            transition: transform .25s;
        }
        .step-dot.accent {
            background: var(--accent);
            color: var(--deep);
            box-shadow: 0 0 0 6px var(--accent-soft);
        }
        .step-card:hover .step-dot {
            transform: scale(1.08);
        }

        /* ===== 安全须知（深色） ===== */
        .notice-item-dark {
            display: flex;
            gap: 1rem;
            align-items: flex-start;
            background: rgba(255, 255, 255, .05);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius);
            padding: 1.4rem 1.5rem;
            backdrop-filter: blur(8px);
            transition: background .25s ease, border-color .25s ease, transform .25s ease;
        }
        .notice-item-dark:hover {
            background: rgba(255, 255, 255, .09);
            border-color: rgba(240, 165, 0, .35);
            transform: translateX(4px);
        }
        .notice-icon {
            flex-shrink: 0;
            width: 2.75rem;
            height: 2.75rem;
            border-radius: .75rem;
            background: var(--accent-soft);
            color: #b45309;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
        }
        .notice-item-dark .notice-icon {
            background: rgba(240, 165, 0, .15);
            color: var(--accent);
        }
        .badge-dark {
            display: inline-flex;
            align-items: center;
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .15);
            color: #fff;
            font-size: .875rem;
            font-weight: 500;
            padding: .4rem 1rem;
            border-radius: 999px;
            transition: all .2s ease;
        }
        .badge-dark:hover {
            background: rgba(240, 165, 0, .15);
            border-color: rgba(240, 165, 0, .4);
            color: var(--accent);
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: border-color .25s ease, box-shadow .25s ease;
            overflow: hidden;
        }
        .faq-item[open] {
            border-color: rgba(240, 165, 0, .35);
            box-shadow: var(--shadow-md);
        }
        .faq-item summary {
            padding: 1.35rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            color: var(--deep);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            list-style: none;
            transition: color .2s;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: .85rem;
            color: var(--accent);
            flex-shrink: 0;
            transition: transform .25s ease;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item summary:hover {
            color: var(--primary);
        }
        .faq-body {
            padding: 0 1.5rem 1.5rem;
            color: var(--muted);
            line-height: 1.75;
            font-size: .95rem;
        }

        /* ===== 页脚 ===== */
        .footer-link {
            color: rgba(255, 255, 255, .6);
            transition: color .2s ease, padding-left .2s ease;
        }
        .footer-link:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        /* ===== 图片遮罩 / 通用 ===== */
        .overlay-gradient {
            background: linear-gradient(90deg, rgba(15, 23, 42, .95) 0%, rgba(15, 23, 42, .8) 45%, rgba(15, 23, 42, .35) 100%);
        }
        .overlay-center {
            background: rgba(15, 23, 42, .6);
        }
        .hero-badge {
            box-shadow: 0 0 0 1px rgba(240, 165, 0, .3);
        }