/* roulang page: index */
:root {
            --brand-600: #0b2a4a;
            --brand-700: #09213c;
            --brand-900: #051425;
            --accent-500: #f59e0b;
            --surface: #f8fafc;
            --text-strong: #0f172a;
            --text-weak: #64748b;
            --border: #e2e8f0;
            --radius: 1rem;
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            color: var(--text-strong);
            background: #fff;
            line-height: 1.6;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            display: block;
        }
        .container-site {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        .site-header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }
        .nav-tabs {
            display: flex;
            gap: 0.4rem;
            overflow-x: auto;
            scrollbar-width: none;
            padding-bottom: 0.5rem;
        }
        .nav-tabs::-webkit-scrollbar {
            display: none;
        }
        .nav-tab {
            white-space: nowrap;
            padding: 0.5rem 1.2rem;
            border-radius: 999px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-weak);
            background: transparent;
            border: 1px solid transparent;
            transition: all 0.2s ease;
        }
        .nav-tab:hover {
            color: var(--brand-600);
            background: rgba(11, 42, 74, 0.06);
            border-color: rgba(11, 42, 74, 0.08);
        }
        .nav-tab.active {
            color: #fff;
            background: var(--brand-600);
            border-color: var(--brand-600);
            box-shadow: 0 4px 14px -4px rgba(11, 42, 74, 0.35);
        }
        .hero {
            position: relative;
            background-position: center;
            background-size: cover;
            background-repeat: no-repeat;
        }
        .hero-overlay {
            background: linear-gradient(135deg, rgba(5, 20, 37, 0.9) 0%, rgba(9, 33, 60, 0.72) 50%, rgba(11, 42, 74, 0.38) 100%);
        }
        .card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: 0 10px 30px -10px rgba(2, 12, 27, 0.1);
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 18px 40px -12px rgba(2, 12, 27, 0.18);
            border-color: rgba(11, 42, 74, 0.15);
        }
        .category-card .pic {
            overflow: hidden;
        }
        .category-card img {
            transition: transform 0.5s ease;
        }
        .category-card:hover img {
            transform: scale(1.05);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            padding: 0.25rem 0.7rem;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.7rem 1.5rem;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            border: none;
            transition: all 0.2s ease;
        }
        .btn-primary {
            background: var(--accent-500);
            color: var(--brand-900);
        }
        .btn-primary:hover {
            background: #fbbf24;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px -6px rgba(245, 158, 11, 0.5);
        }
        .btn-outline {
            border: 1px solid rgba(255, 255, 255, 0.55);
            color: #fff;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.14);
            border-color: rgba(255, 255, 255, 0.8);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
        }
        .section-subtitle {
            color: var(--text-weak);
            font-size: 1rem;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: 1rem;
            background: #fff;
            overflow: hidden;
            transition: box-shadow 0.2s;
        }
        .faq-item:hover {
            box-shadow: 0 6px 20px -8px rgba(2, 12, 27, 0.12);
        }
        .faq-item summary {
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            font-size: 1rem;
            padding: 1.25rem 1.5rem;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary i {
            transition: transform 0.3s ease;
            color: #94a3b8;
        }
        .faq-item[open] summary i {
            transform: rotate(180deg);
        }
        .faq-item .faq-content {
            padding: 0 1.5rem 1.25rem;
            color: var(--text-weak);
            font-size: 0.925rem;
        }
        .footer-link {
            color: #94a3b8;
            transition: color 0.2s ease;
        }
        .footer-link:hover {
            color: #f8fafc;
        }
        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 3px solid rgba(245, 158, 11, 0.5);
            outline-offset: 2px;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.6rem;
            }
            .nav-tab {
                padding: 0.4rem 1rem;
                font-size: 0.85rem;
            }
            .btn {
                padding: 0.6rem 1.2rem;
                font-size: 0.9rem;
            }
        }
        @media (max-width: 520px) {
            .container-site {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --brand-50: #eef7ff;
            --brand-100: #d9edff;
            --brand-200: #bce0ff;
            --brand-300: #8ecdff;
            --brand-400: #59b0ff;
            --brand-500: #3390ff;
            --brand-600: #1a6df5;
            --brand-700: #1757e1;
            --brand-800: #1947b6;
            --brand-900: #1a3f8f;
            --brand-950: #152a56;
            --accent-400: #fbbf24;
            --accent-500: #f59e0b;
            --accent-600: #d97706;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --border-light: #e2e8f0;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.10);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

        /* ===== 布局容器 ===== */
        .container-site {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        @media (max-width: 640px) {
            .container-site {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }

        /* ===== Header 导航 ===== */
        .site-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
        }

        .nav-tabs {
            display: flex;
            gap: 0.5rem;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.45rem 1rem;
            border-radius: 999px;
            font-size: 0.875rem;
            font-weight: 600;
            color: #64748b;
            white-space: nowrap;
            transition: all 0.25s ease;
            border: 1px solid transparent;
        }

        .nav-tab:hover {
            background: #f1f5f9;
            color: var(--brand-700);
        }

        .nav-tab.active {
            background: var(--brand-600);
            color: #fff;
            box-shadow: 0 4px 12px rgba(26, 109, 245, 0.3);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.6rem 1.4rem;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.875rem;
            transition: all 0.25s ease;
            border: none;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--brand-600);
            color: #fff;
            box-shadow: 0 4px 14px rgba(26, 109, 245, 0.28);
        }

        .btn-primary:hover {
            background: var(--brand-700);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(26, 109, 245, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(26, 109, 245, 0.3);
        }

        .btn-outline {
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.65);
            color: #fff;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
            transform: translateY(-2px);
        }

        .btn-outline-light {
            background: transparent;
            border: 1.5px solid var(--brand-300);
            color: var(--brand-700);
        }

        .btn-outline-light:hover {
            background: var(--brand-50);
            border-color: var(--brand-400);
        }

        .btn-accent {
            background: var(--accent-500);
            color: #1e293b;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
        }

        .btn-accent:hover {
            background: var(--accent-400);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
        }

        /* ===== Hero 区域 ===== */
        .page-hero {
            background-image: linear-gradient(135deg, rgba(21, 42, 86, 0.94), rgba(26, 109, 245, 0.88)), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            padding: 5rem 0 4.5rem;
            position: relative;
            overflow: hidden;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -60%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #e0f2fe;
            font-size: 0.8rem;
            font-weight: 500;
            padding: 0.35rem 0.9rem;
            border-radius: 999px;
            backdrop-filter: blur(6px);
        }

        .hero-title {
            font-size: clamp(2rem, 4vw, 3.2rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .hero-subtitle {
            font-size: clamp(1rem, 1.5vw, 1.15rem);
            color: rgba(226, 232, 240, 0.9);
            max-width: 650px;
        }

        .hero-stat {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-md);
            padding: 0.9rem 1.2rem;
            backdrop-filter: blur(8px);
            text-align: center;
        }

        .hero-stat .num {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
        }

        .hero-stat .label {
            font-size: 0.78rem;
            color: rgba(226, 232, 240, 0.75);
            margin-top: 0.15rem;
        }

        /* ===== Section 板块 ===== */
        .section-block {
            padding: 4.5rem 0;
        }

        .section-block-alt {
            background: #fff;
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: var(--brand-50);
            color: var(--brand-700);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 0.3rem 0.85rem;
            border-radius: 999px;
            margin-bottom: 1rem;
            border: 1px solid var(--brand-100);
        }

        .section-title {
            font-size: clamp(1.6rem, 2.8vw, 2.2rem);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: var(--brand-950);
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 640px;
        }

        /* ===== 卡片 ===== */
        .entry-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: all 0.3s ease;
            box-shadow: var(--shadow-sm);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .entry-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--brand-200);
        }

        .entry-card .card-img {
            height: 190px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .entry-card .card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(0,0,0,0.05) 0%, transparent 40%, rgba(0,0,0,0.35) 100%);
        }

        .entry-card .card-badge {
            position: absolute;
            top: 1rem;
            left: 1rem;
            z-index: 2;
            background: var(--accent-500);
            color: #1e293b;
            font-size: 0.72rem;
            font-weight: 700;
            padding: 0.2rem 0.7rem;
            border-radius: 999px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.15);
        }

        .entry-card .card-body {
            padding: 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .entry-card .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--brand-950);
            margin-bottom: 0.5rem;
        }

        .entry-card .card-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            flex: 1;
            line-height: 1.7;
        }

        /* ===== 特点图标卡片 ===== */
        .feature-item {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 1.8rem 1.5rem;
            border: 1px solid var(--border-light);
            transition: all 0.3s ease;
            box-shadow: var(--shadow-sm);
            height: 100%;
        }

        .feature-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--brand-200);
        }

        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.35rem;
            margin-bottom: 1.1rem;
        }

        /* ===== 流程 ===== */
        .step-item {
            position: relative;
            padding: 1.8rem 1.5rem;
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            height: 100%;
            transition: all 0.3s ease;
        }

        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--brand-600);
            color: #fff;
            font-weight: 800;
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }

        /* ===== 安全提示区块 ===== */
        .safety-section {
            background-image: linear-gradient(120deg, rgba(21, 42, 86, 0.95), rgba(26, 109, 245, 0.85)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            padding: 4rem 0;
            position: relative;
            overflow: hidden;
        }

        .safety-card {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: var(--radius-md);
            padding: 1.4rem 1.3rem;
            backdrop-filter: blur(6px);
            height: 100%;
            transition: all 0.3s ease;
        }

        .safety-card:hover {
            background: rgba(255, 255, 255, 0.14);
            transform: translateY(-3px);
        }

        .safety-card i {
            font-size: 1.4rem;
            color: var(--accent-400);
            margin-bottom: 0.8rem;
        }

        .safety-card h3 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.35rem;
        }

        .safety-card p {
            font-size: 0.82rem;
            color: rgba(226, 232, 240, 0.8);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 0.85rem;
            overflow: hidden;
            transition: border-color 0.2s ease;
        }

        .faq-item:hover {
            border-color: var(--brand-200);
        }

        .faq-question {
            padding: 1.2rem 1.4rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--brand-950);
            cursor: pointer;
            user-select: none;
        }

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

        .faq-item.open .faq-question i {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
        }

        .faq-answer-inner {
            padding: 0 1.4rem 1.2rem;
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.8;
        }

        /* ===== CTA 区块 ===== */
        .cta-box {
            background: linear-gradient(120deg, var(--brand-600), var(--brand-800));
            border-radius: var(--radius-xl);
            padding: 3rem 2.5rem;
            position: relative;
            overflow: hidden;
            box-shadow: 0 16px 48px rgba(26, 109, 245, 0.28);
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -10%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
        }

        .cta-box::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: 20%;
            width: 200px;
            height: 200px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 50%;
        }

        /* ===== Footer ===== */
        .footer-link {
            color: #94a3b8;
            transition: color 0.2s ease;
            position: relative;
        }

        .footer-link:hover {
            color: #fff;
        }

        /* ===== 焦点可访问性 ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid var(--accent-400);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== 移动端适配 ===== */
        @media (max-width: 1024px) {
            .page-hero {
                padding: 4rem 0 3.5rem;
            }
            .section-block {
                padding: 3.5rem 0;
            }
        }

        @media (max-width: 768px) {
            .page-hero {
                padding: 3rem 0 2.8rem;
                background-attachment: scroll;
            }
            .section-block {
                padding: 2.8rem 0;
            }
            .entry-card .card-img {
                height: 165px;
            }
            .cta-box {
                padding: 2.2rem 1.5rem;
            }
            .safety-section {
                padding: 3rem 0;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.65rem;
            }
            .nav-tab {
                padding: 0.4rem 0.8rem;
                font-size: 0.8rem;
            }
            .btn {
                padding: 0.5rem 1.1rem;
                font-size: 0.82rem;
            }
            .entry-card .card-body {
                padding: 1.2rem;
            }
            .feature-item {
                padding: 1.3rem 1.1rem;
            }
            .step-item {
                padding: 1.4rem 1.1rem;
            }
        }

/* roulang page: article */
:root {
            --brand-50: #eef4ff;
            --brand-100: #dce6fc;
            --brand-200: #bccbf8;
            --brand-300: #93acf2;
            --brand-400: #6286ea;
            --brand-500: #4164dd;
            --brand-600: #2f4bd8;
            --brand-700: #263cb8;
            --brand-800: #1e2f8e;
            --brand-900: #182766;
            --accent-500: #f59e0b;
            --slate-50: #f8fafc;
            --slate-100: #f1f5f9;
            --slate-200: #e2e8f0;
            --slate-300: #cbd5e1;
            --slate-400: #94a3b8;
            --slate-500: #64748b;
            --slate-600: #475569;
            --slate-700: #334155;
            --slate-800: #1e293b;
            --slate-900: #0f172a;
            --radius-xl: 16px;
            --radius-2xl: 24px;
            --radius-3xl: 32px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background-color: #f8fafc;
            color: #334155;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button,
        input {
            font-family: inherit;
        }

        .container-site {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 640px) {
            .container-site {
                padding: 0 16px;
            }
        }

        .site-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(15, 23, 42, 0.06);
        }

        .nav-tabs {
            display: flex;
            gap: 8px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-tab {
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: #475569;
            white-space: nowrap;
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .nav-tab:hover {
            color: var(--brand-600);
            background: rgba(47, 75, 216, 0.06);
        }

        .nav-tab.active {
            background: var(--brand-600);
            color: #fff;
            box-shadow: 0 4px 14px rgba(47, 75, 216, 0.25);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 14px;
            transition: all 0.2s ease;
            cursor: pointer;
            border: none;
            line-height: 1.2;
            outline: none;
        }

        .btn:focus-visible {
            box-shadow: 0 0 0 3px rgba(47, 75, 216, 0.3);
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--brand-600), var(--brand-500));
            color: #fff;
            box-shadow: 0 4px 14px rgba(47, 75, 216, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-1px);
            box-shadow: 0 8px 22px rgba(47, 75, 216, 0.35);
            background: linear-gradient(135deg, var(--brand-700), var(--brand-600));
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(47, 75, 216, 0.25);
        }

        .btn-accent {
            background: linear-gradient(135deg, #f59e0b, #fbbf24);
            color: #182766;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
        }

        .btn-accent:hover {
            transform: translateY(-1px);
            box-shadow: 0 8px 22px rgba(245, 158, 11, 0.4);
        }

        .btn-outline {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.6);
            color: #fff;
        }

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

        .btn-lg {
            padding: 14px 32px;
            font-size: 15px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            line-height: 1.2;
        }

        .badge-primary {
            background: rgba(47, 75, 216, 0.1);
            color: var(--brand-600);
        }

        .badge-accent {
            background: rgba(245, 158, 11, 0.15);
            color: #b45309;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            background: var(--slate-100);
            color: var(--slate-600);
            transition: all 0.2s;
            cursor: default;
        }

        .tag:hover {
            background: rgba(47, 75, 216, 0.1);
            color: var(--brand-600);
        }

        .footer-link {
            color: #94a3b8;
            transition: color 0.2s, transform 0.2s;
        }

        .footer-link:hover {
            color: #fff;
        }

        .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: #334155;
            overflow-wrap: break-word;
        }

        .article-content p {
            margin-bottom: 1.5em;
        }

        .article-content h2 {
            font-size: 1.5em;
            font-weight: 700;
            color: #0f172a;
            margin: 1.8em 0 0.8em;
            padding-bottom: 0.5em;
            border-bottom: 2px solid #e2e8f0;
        }

        .article-content h3 {
            font-size: 1.25em;
            font-weight: 600;
            color: #0f172a;
            margin: 1.5em 0 0.6em;
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 1.5em;
            padding-left: 1.5em;
        }

        .article-content ul li {
            list-style: disc;
            margin-bottom: 0.4em;
        }

        .article-content ol li {
            list-style: decimal;
            margin-bottom: 0.4em;
        }

        .article-content a {
            color: var(--brand-600);
            text-decoration: underline;
        }

        .article-content a:hover {
            color: var(--brand-700);
        }

        .article-content img {
            border-radius: 16px;
            max-width: 100%;
            height: auto;
            margin: 1.5em 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }

        .article-content blockquote {
            border-left: 4px solid var(--brand-600);
            background: #f1f5f9;
            padding: 1em 1.5em;
            border-radius: 0 16px 16px 0;
            margin: 1.5em 0;
            color: #475569;
            font-style: italic;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 1.5em;
            font-size: 14px;
        }

        .article-content table th,
        .article-content table td {
            border: 1px solid #e2e8f0;
            padding: 10px 14px;
            text-align: left;
        }

        .article-content table th {
            background: #f8fafc;
            font-weight: 600;
        }

        .line-clamp-2 {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .line-clamp-3 {
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .hero-mask {
            background: linear-gradient(135deg, rgba(24, 39, 102, 0.92), rgba(47, 75, 216, 0.82));
        }

        .cta-mask {
            background: linear-gradient(135deg, rgba(24, 39, 102, 0.95), rgba(30, 47, 142, 0.85));
        }

        @media (max-width: 768px) {
            .nav-tab {
                padding: 7px 14px;
                font-size: 13px;
            }

            .article-content {
                font-size: 15px;
            }
        }

/* roulang page: category2 */
:root {
            --brand: #1d4ed8;
            --brand-dark: #1e40af;
            --accent: #f59e0b;
            --bg-light: #f8fafc;
            --text-main: #1e293b;
            --text-weak: #64748b;
            --border: #e2e8f0;
            --radius-lg: 20px;
            --radius-md: 14px;
            --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 12px 32px rgba(29, 78, 216, 0.12);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            color: var(--text-main);
            background: var(--bg-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        button,
        input {
            font-family: inherit;
        }

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

        .site-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
        }

        .nav-tabs {
            display: flex;
            gap: 6px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: #475569;
            white-space: nowrap;
            transition: all 0.25s ease;
            border: 1px solid transparent;
        }

        .nav-tab:hover {
            background: var(--brand-50);
            color: var(--brand-600);
            border-color: #bfdbfe;
        }

        .nav-tab.active {
            background: var(--brand-600);
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(29, 78, 216, 0.28);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 12px;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 20px;
            transition: all 0.25s ease;
            border: none;
            cursor: pointer;
            outline: none;
        }

        .btn-primary {
            background: var(--brand);
            color: #fff;
            box-shadow: 0 4px 14px rgba(29, 78, 216, 0.24);
        }

        .btn-primary:hover {
            background: var(--brand-dark);
            box-shadow: 0 8px 24px rgba(29, 78, 216, 0.3);
            transform: translateY(-1px);
        }

        .btn-outline {
            background: transparent;
            color: var(--brand);
            border: 1.5px solid #c7d2fe;
        }

        .btn-outline:hover {
            background: #eef2ff;
            border-color: var(--brand-400);
            transform: translateY(-1px);
        }

        .btn-accent {
            background: var(--accent);
            color: #0f172a;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
        }

        .btn-accent:hover {
            background: #eab308;
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.36);
        }

        .btn:focus-visible,
        .nav-tab:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--brand-500);
            outline-offset: 2px;
        }

        .footer-link {
            color: #94a3b8;
            transition: color 0.2s ease;
        }

        .footer-link:hover {
            color: #fbbf24;
        }

        .card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }

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

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            background: var(--brand-50);
            color: var(--brand-700);
            border: 1px solid #e0eaff;
        }

        .badge-accent {
            background: #fffbeb;
            color: #b45309;
            border-color: #fde68a;
        }

        .section-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--brand-600);
            color: #fff;
            font-weight: 800;
            font-size: 14px;
            flex-shrink: 0;
        }

        .step-line {
            position: relative;
        }

        .step-line::after {
            content: '';
            position: absolute;
            top: 50px;
            left: 18px;
            bottom: -20px;
            width: 2px;
            background: linear-gradient(to bottom, var(--brand-200), var(--brand-50));
            border-radius: 2px;
        }

        .step-line:last-child::after {
            display: none;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 22px 24px;
            transition: all 0.25s ease;
        }

        .faq-item:hover {
            border-color: #bfdbfe;
            box-shadow: 0 4px 16px rgba(29, 78, 216, 0.08);
        }

        .hero-banner {
            background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(29, 78, 216, 0.82) 100%), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .cta-banner {
            background-image: linear-gradient(120deg, rgba(15, 23, 42, 0.9) 0%, rgba(30, 64, 175, 0.85) 100%), url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .cover-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 12px;
            transition: transform 0.4s ease;
        }

        .card-hover:hover .cover-img {
            transform: scale(1.03);
        }

        .img-wrap {
            overflow: hidden;
            border-radius: 12px;
        }

        @media (max-width: 768px) {
            .container-site {
                padding-left: 16px;
                padding-right: 16px;
            }
            .nav-tab {
                font-size: 13px;
                padding: 7px 14px;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 28px;
                line-height: 1.25;
                word-break: break-word;
            }
            .nav-tabs {
                padding-bottom: 6px;
            }
        }

/* roulang page: category3 */
:root {
            --brand: #4f46e5;
            --brand-dark: #4338ca;
            --brand-deep: #1e1b4b;
            --accent: #f59e0b;
            --bg-soft: #f8fafc;
            --text-main: #0f172a;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border-light: #e2e8f0;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
            --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 16px 32px rgba(15, 23, 42, 0.12);
            --shadow-brand: 0 4px 14px rgba(79, 70, 229, 0.25);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            line-height: 1.65;
            color: var(--text-main);
            background: var(--bg-soft);
            -webkit-font-smoothing: antialiased;
        }

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

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

        button,
        input {
            font-family: inherit;
        }

        .container-site {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        .site-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid #f1f5f9;
        }

        .nav-tabs {
            display: flex;
            gap: 0.375rem;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }

        .nav-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            padding: 0.5rem 1.1rem;
            border-radius: 9999px;
            font-size: 0.875rem;
            font-weight: 600;
            color: #475569;
            background: transparent;
            border: 1px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-tab:hover {
            color: var(--brand);
            background: #eef2ff;
            border-color: #e0e7ff;
        }

        .nav-tab.active {
            color: var(--brand);
            background: #eef2ff;
            border-color: #c7d2fe;
            box-shadow: 0 1px 4px rgba(79, 70, 229, 0.12);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.625rem 1.25rem;
            border-radius: 0.75rem;
            font-weight: 600;
            font-size: 0.875rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--brand);
            color: #fff;
            box-shadow: var(--shadow-brand);
        }

        .btn-primary:hover {
            background: var(--brand-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(79, 70, 229, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(79, 70, 229, 0.25);
        }

        .btn-primary:focus-visible {
            outline: 3px solid rgba(79, 70, 229, 0.35);
            outline-offset: 2px;
        }

        .btn-outline {
            background: transparent;
            color: var(--brand);
            border: 1.5px solid #c7d2fe;
        }

        .btn-outline:hover {
            background: #eef2ff;
            border-color: var(--brand);
            transform: translateY(-1px);
        }

        .btn-accent {
            background: var(--accent);
            color: #1e1b4b;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
        }

        .btn-accent:hover {
            background: #d97706;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(217, 119, 6, 0.35);
        }

        .hero-banner {
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            isolation: isolate;
        }

        .hero-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(115deg, rgba(30, 27, 75, 0.95) 0%, rgba(49, 46, 129, 0.88) 45%, rgba(79, 70, 229, 0.72) 100%);
            z-index: -1;
        }

        .hero-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 80% 20%, rgba(245, 158, 11, 0.18) 0%, transparent 55%);
            z-index: -1;
        }

        .card-hover {
            transition: var(--transition);
        }

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

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.02em;
        }

        .badge-brand {
            background: #eef2ff;
            color: #4f46e5;
            border: 1px solid #e0e7ff;
        }

        .badge-accent {
            background: #fffbeb;
            color: #d97706;
            border: 1px solid #fde68a;
        }

        .badge-green {
            background: #f0fdf4;
            color: #16a34a;
            border: 1px solid #bbf7d0;
        }

        .badge-blue {
            background: #eff6ff;
            color: #2563eb;
            border: 1px solid #bfdbfe;
        }

        .timeline-wrap {
            position: relative;
        }

        .timeline-wrap::before {
            content: '';
            position: absolute;
            left: 18px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: linear-gradient(to bottom, #c7d2fe, #e0e7ff, #f1f5f9);
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            padding-left: 56px;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: 11px;
            top: 20px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: #fff;
            border: 3px solid var(--brand);
            box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.12);
        }

        .section-title {
            font-size: 1.875rem;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.02em;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .footer-link {
            color: #94a3b8;
            transition: var(--transition);
        }

        .footer-link:hover {
            color: #fbbf24;
            padding-left: 2px;
        }

        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            background: #fff;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: #c7d2fe;
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            cursor: pointer;
            transition: color 0.2s ease;
        }

        .faq-question:hover {
            color: var(--brand);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease, opacity 0.3s ease;
            opacity: 0;
            padding: 0 1.25rem;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            opacity: 1;
            padding-bottom: 1.25rem;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--brand);
            color: #fff;
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #f1f5f9;
            color: #64748b;
            font-size: 0.8rem;
            transition: var(--transition);
            flex-shrink: 0;
        }

        .news-card-img {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        }

        .news-card-img img {
            transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        .news-card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, transparent 60%, rgba(15, 23, 42, 0.12) 100%);
        }

        .stats-card {
            background: #fff;
            border-radius: var(--radius-xl);
            padding: 2rem 1.25rem;
            text-align: center;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .stats-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: #c7d2fe;
        }

        .stats-icon {
            width: 52px;
            height: 52px;
            border-radius: 16px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #eef2ff, #e0e7ff);
            color: var(--brand);
            font-size: 1.3rem;
            margin-bottom: 0.75rem;
        }

        .cta-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            isolation: isolate;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30, 27, 75, 0.94) 0%, rgba(49, 46, 129, 0.9) 60%, rgba(79, 70, 229, 0.8) 100%);
            z-index: -1;
        }

        .cta-input {
            width: 100%;
            padding: 0.75rem 1rem;
            border-radius: 0.75rem;
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 0.9rem;
            transition: var(--transition);
            outline: none;
        }

        .cta-input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }

        .cta-input:focus {
            border-color: #fbbf24;
            background: rgba(255, 255, 255, 0.15);
            box-shadow: 0 0 0 4px rgba(251, 191, 36, 0.15);
        }

        .banner-breadcrumb {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.6);
            padding: 0.35rem 0.9rem;
            border-radius: 9999px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
        }

        .banner-breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            transition: color 0.2s;
        }

        .banner-breadcrumb a:hover {
            color: #fbbf24;
        }

        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.8rem;
            font-weight: 700;
            color: #fbbf24;
            letter-spacing: 0.02em;
        }

        .section-divider {
            height: 1px;
            background: linear-gradient(to right, transparent, var(--border-light), transparent);
            border: none;
        }

        @media (max-width: 768px) {
            .container-site {
                padding-left: 1rem;
                padding-right: 1rem;
            }

            .nav-tab {
                padding: 0.4rem 0.85rem;
                font-size: 0.8rem;
            }

            .hero-banner {
                min-height: 320px;
                padding: 2.5rem 0;
            }

            .section-title {
                font-size: 1.5rem;
            }

            .stats-card {
                padding: 1.5rem 1rem;
            }

            .timeline-wrap::before {
                left: 14px;
            }

            .timeline-item {
                padding-left: 46px;
            }

            .timeline-item::before {
                left: 7px;
                width: 14px;
                height: 14px;
            }
        }

        @media (max-width: 520px) {
            .hero-banner {
                min-height: 280px;
            }

            .banner-breadcrumb {
                font-size: 0.7rem;
                padding: 0.25rem 0.7rem;
            }

            .btn {
                padding: 0.5rem 1rem;
                font-size: 0.8rem;
            }

            .badge {
                font-size: 0.7rem;
                padding: 0.2rem 0.6rem;
            }
        }