/* roulang page: index */
/* ===== 设计变量 ===== */
    :root {
        --clr-primary: #e74c3c;
        --clr-primary-dark: #c0392b;
        --clr-primary-light: #f1948a;
        --clr-accent: #f1c40f;
        --clr-bg: #0b0e17;
        --clr-bg-alt: #111520;
        --clr-card: #151a28;
        --clr-card-hover: #1c2235;
        --clr-nav: #0d1117;
        --clr-text: #f0f2f5;
        --clr-text-secondary: #94a3b8;
        --clr-text-muted: #64748b;
        --clr-border: rgba(255, 255, 255, 0.06);
        --clr-border-hover: rgba(255, 255, 255, 0.12);
        --radius-sm: 6px;
        --radius-md: 12px;
        --radius-lg: 20px;
        --radius-xl: 28px;
        --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.35);
        --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.45);
        --shadow-glow: 0 0 30px rgba(231, 76, 60, 0.15);
        --font-sans: 'Inter', -apple-system, 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
        --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
        --sidebar-width: 240px;
        --header-height: 64px;
        --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* ===== 基础 Reset ===== */
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    body {
        font-family: var(--font-sans);
        background: var(--clr-bg);
        color: var(--clr-text);
        line-height: 1.6;
        font-size: 16px;
        min-height: 100vh;
        display: flex;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: color var(--transition);
    }
    a:hover {
        color: var(--clr-primary);
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    button,
    input,
    textarea {
        font-family: inherit;
        font-size: inherit;
        border: none;
        outline: none;
        background: none;
        color: inherit;
    }
    button {
        cursor: pointer;
    }
    ul,
    ol {
        list-style: none;
    }
    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        font-weight: 700;
        line-height: 1.25;
        color: var(--clr-text);
    }
    h1 {
        font-size: clamp(2rem, 5vw, 3.5rem);
    }
    h2 {
        font-size: clamp(1.5rem, 3.5vw, 2.5rem);
    }
    h3 {
        font-size: clamp(1.2rem, 2.5vw, 1.75rem);
    }
    p {
        color: var(--clr-text-secondary);
        line-height: 1.7;
    }

    /* ===== 布局系统 ===== */
    .app-shell {
        display: flex;
        min-height: 100vh;
        width: 100%;
    }

    /* ===== 左侧导航栏 ===== */
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: var(--sidebar-width);
        height: 100vh;
        background: var(--clr-nav);
        border-right: 1px solid var(--clr-border);
        display: flex;
        flex-direction: column;
        z-index: 1000;
        transition: transform var(--transition);
        overflow-y: auto;
    }
    .sidebar-brand {
        padding: 24px 20px 20px;
        border-bottom: 1px solid var(--clr-border);
    }
    .sidebar-brand a {
        font-size: 1.35rem;
        font-weight: 800;
        letter-spacing: 0.5px;
        background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        display: inline-block;
    }
    .sidebar-brand span {
        font-size: 0.7rem;
        font-weight: 400;
        color: var(--clr-text-muted);
        display: block;
        margin-top: 2px;
        -webkit-text-fill-color: var(--clr-text-muted);
        background: none;
    }
    .sidebar-nav {
        flex: 1;
        padding: 16px 12px;
        display: flex;
        flex-direction: column;
        gap: 4px;
    }
    .sidebar-nav .nav-item {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 12px 16px;
        border-radius: var(--radius-sm);
        color: var(--clr-text-secondary);
        font-weight: 500;
        font-size: 0.95rem;
        transition: all var(--transition);
        position: relative;
    }
    .sidebar-nav .nav-item i {
        width: 20px;
        text-align: center;
        font-size: 1.05rem;
    }
    .sidebar-nav .nav-item:hover {
        background: rgba(255, 255, 255, 0.05);
        color: var(--clr-text);
    }
    .sidebar-nav .nav-item.active {
        background: rgba(231, 76, 60, 0.12);
        color: var(--clr-primary);
        font-weight: 600;
    }
    .sidebar-nav .nav-item.active::before {
        content: '';
        position: absolute;
        left: 0;
        top: 50%;
        transform: translateY(-50%);
        width: 3px;
        height: 24px;
        background: var(--clr-primary);
        border-radius: 0 4px 4px 0;
    }
    .sidebar-footer {
        padding: 16px 20px;
        border-top: 1px solid var(--clr-border);
        font-size: 0.75rem;
        color: var(--clr-text-muted);
    }

    /* ===== 主内容区 ===== */
    .main-content {
        margin-left: var(--sidebar-width);
        flex: 1;
        min-height: 100vh;
        width: calc(100% - var(--sidebar-width));
    }

    /* ===== 移动端顶部栏 ===== */
    .mobile-header {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: var(--header-height);
        background: var(--clr-nav);
        border-bottom: 1px solid var(--clr-border);
        z-index: 999;
        padding: 0 16px;
        align-items: center;
        justify-content: space-between;
    }
    .mobile-header .brand {
        font-size: 1.2rem;
        font-weight: 800;
        background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .mobile-header .hamburger {
        width: 40px;
        height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: var(--radius-sm);
        color: var(--clr-text);
        font-size: 1.3rem;
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid var(--clr-border);
        transition: all var(--transition);
    }
    .mobile-header .hamburger:hover {
        background: rgba(255, 255, 255, 0.1);
    }
    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.6);
        z-index: 999;
        backdrop-filter: blur(4px);
    }

    /* ===== Container ===== */
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ===== 板块通用 ===== */
    .section {
        padding: 80px 0;
    }
    .section-header {
        text-align: center;
        margin-bottom: 48px;
    }
    .section-header h2 {
        margin-bottom: 12px;
    }
    .section-header p {
        max-width: 600px;
        margin: 0 auto;
        color: var(--clr-text-secondary);
        font-size: 1.05rem;
    }
    .section-header .badge {
        display: inline-block;
        padding: 4px 16px;
        border-radius: 20px;
        background: rgba(231, 76, 60, 0.12);
        color: var(--clr-primary);
        font-size: 0.8rem;
        font-weight: 600;
        letter-spacing: 0.5px;
        margin-bottom: 16px;
        text-transform: uppercase;
    }

    /* ===== Hero ===== */
    .hero {
        position: relative;
        padding: 120px 0 100px;
        background: var(--clr-bg-alt);
        overflow: hidden;
        min-height: 80vh;
        display: flex;
        align-items: center;
    }
    .hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        opacity: 0.35;
        filter: saturate(0.6) brightness(0.7);
        z-index: 0;
    }
    .hero::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(11, 14, 23, 0.92) 0%, rgba(11, 14, 23, 0.7) 50%, rgba(11, 14, 23, 0.85) 100%);
        z-index: 1;
    }
    .hero .container {
        position: relative;
        z-index: 2;
    }
    .hero-content {
        max-width: 720px;
    }
    .hero-content .hero-badge {
        display: inline-block;
        padding: 6px 20px;
        border-radius: 20px;
        background: rgba(231, 76, 60, 0.15);
        border: 1px solid rgba(231, 76, 60, 0.25);
        color: var(--clr-primary-light);
        font-size: 0.85rem;
        font-weight: 600;
        letter-spacing: 0.3px;
        margin-bottom: 24px;
        backdrop-filter: blur(4px);
    }
    .hero-content h1 {
        font-size: clamp(2.4rem, 6vw, 4rem);
        font-weight: 900;
        line-height: 1.1;
        margin-bottom: 20px;
        letter-spacing: -0.5px;
    }
    .hero-content h1 span {
        background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .hero-content p {
        font-size: clamp(1rem, 2vw, 1.2rem);
        color: var(--clr-text-secondary);
        max-width: 560px;
        margin-bottom: 32px;
        line-height: 1.8;
    }
    .hero-actions {
        display: flex;
        gap: 16px;
        flex-wrap: wrap;
    }

    /* ===== 按钮 ===== */
    .btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 14px 32px;
        border-radius: var(--radius-sm);
        font-weight: 600;
        font-size: 0.95rem;
        transition: all var(--transition);
        border: 1px solid transparent;
        letter-spacing: 0.3px;
    }
    .btn-primary {
        background: var(--clr-primary);
        color: #fff;
        border-color: var(--clr-primary);
        box-shadow: 0 4px 20px rgba(231, 76, 60, 0.3);
    }
    .btn-primary:hover {
        background: var(--clr-primary-dark);
        border-color: var(--clr-primary-dark);
        box-shadow: 0 6px 28px rgba(231, 76, 60, 0.45);
        transform: translateY(-2px);
        color: #fff;
    }
    .btn-primary:active {
        transform: translateY(0);
        box-shadow: 0 2px 12px rgba(231, 76, 60, 0.25);
    }
    .btn-outline {
        background: transparent;
        color: var(--clr-text);
        border-color: var(--clr-border-hover);
    }
    .btn-outline:hover {
        background: rgba(255, 255, 255, 0.06);
        border-color: var(--clr-text-secondary);
        transform: translateY(-2px);
        color: var(--clr-text);
    }
    .btn-outline:active {
        transform: translateY(0);
    }
    .btn-sm {
        padding: 8px 18px;
        font-size: 0.85rem;
    }
    .btn-lg {
        padding: 18px 40px;
        font-size: 1.05rem;
    }

    /* ===== 卡片 ===== */
    .card {
        background: var(--clr-card);
        border-radius: var(--radius-md);
        border: 1px solid var(--clr-border);
        padding: 28px 24px;
        transition: all var(--transition);
    }
    .card:hover {
        background: var(--clr-card-hover);
        border-color: var(--clr-border-hover);
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
    }
    .card .card-icon {
        width: 52px;
        height: 52px;
        border-radius: var(--radius-sm);
        background: rgba(231, 76, 60, 0.1);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.5rem;
        color: var(--clr-primary);
        margin-bottom: 20px;
    }
    .card h3 {
        font-size: 1.2rem;
        margin-bottom: 10px;
    }
    .card p {
        font-size: 0.92rem;
        color: var(--clr-text-secondary);
        line-height: 1.7;
    }
    .card .card-tag {
        display: inline-block;
        padding: 2px 12px;
        border-radius: 12px;
        background: rgba(231, 76, 60, 0.08);
        color: var(--clr-primary-light);
        font-size: 0.75rem;
        font-weight: 500;
        margin-top: 12px;
    }

    /* ===== 网格 ===== */
    .grid-2 {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    .grid-3 {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .grid-4 {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
    }

    /* ===== 特色/优势板块 ===== */
    .features-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .feature-card {
        background: var(--clr-card);
        border-radius: var(--radius-md);
        border: 1px solid var(--clr-border);
        padding: 32px 28px;
        transition: all var(--transition);
        position: relative;
        overflow: hidden;
    }
    .feature-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 3px;
        background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
        opacity: 0;
        transition: opacity var(--transition);
    }
    .feature-card:hover::before {
        opacity: 1;
    }
    .feature-card:hover {
        background: var(--clr-card-hover);
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
        border-color: var(--clr-border-hover);
    }
    .feature-card .icon {
        width: 48px;
        height: 48px;
        border-radius: var(--radius-sm);
        background: rgba(231, 76, 60, 0.1);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.3rem;
        color: var(--clr-primary);
        margin-bottom: 18px;
    }
    .feature-card h3 {
        font-size: 1.15rem;
        margin-bottom: 10px;
    }
    .feature-card p {
        font-size: 0.9rem;
        color: var(--clr-text-secondary);
        line-height: 1.7;
    }

    /* ===== 数据统计 ===== */
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }
    .stat-item {
        text-align: center;
        padding: 32px 16px;
        background: var(--clr-card);
        border-radius: var(--radius-md);
        border: 1px solid var(--clr-border);
        transition: all var(--transition);
    }
    .stat-item:hover {
        background: var(--clr-card-hover);
        border-color: var(--clr-border-hover);
        transform: translateY(-2px);
    }
    .stat-item .number {
        font-size: 2.8rem;
        font-weight: 900;
        background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        line-height: 1.2;
        margin-bottom: 8px;
    }
    .stat-item .label {
        font-size: 0.9rem;
        color: var(--clr-text-secondary);
        font-weight: 500;
    }

    /* ===== 资讯列表 ===== */
    .news-list {
        display: grid;
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .news-item {
        display: flex;
        align-items: flex-start;
        gap: 20px;
        padding: 20px 24px;
        background: var(--clr-card);
        border-radius: var(--radius-sm);
        border: 1px solid var(--clr-border);
        transition: all var(--transition);
    }
    .news-item:hover {
        background: var(--clr-card-hover);
        border-color: var(--clr-border-hover);
        transform: translateX(4px);
    }
    .news-item .thumb {
        width: 100px;
        height: 70px;
        border-radius: var(--radius-sm);
        background: var(--clr-bg-alt);
        flex-shrink: 0;
        overflow: hidden;
    }
    .news-item .thumb img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    .news-item .info {
        flex: 1;
        min-width: 0;
    }
    .news-item .info h4 {
        font-size: 1rem;
        font-weight: 600;
        margin-bottom: 6px;
        line-height: 1.4;
    }
    .news-item .info p {
        font-size: 0.85rem;
        color: var(--clr-text-muted);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-item .meta {
        display: flex;
        align-items: center;
        gap: 16px;
        margin-top: 8px;
        font-size: 0.78rem;
        color: var(--clr-text-muted);
    }
    .news-item .meta .cat {
        padding: 2px 10px;
        border-radius: 10px;
        background: rgba(231, 76, 60, 0.08);
        color: var(--clr-primary-light);
        font-weight: 500;
    }
    .news-empty {
        text-align: center;
        padding: 48px 24px;
        background: var(--clr-card);
        border-radius: var(--radius-md);
        border: 1px dashed var(--clr-border);
        color: var(--clr-text-muted);
        font-size: 0.95rem;
    }

    /* ===== 流程步骤 ===== */
    .steps-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
        position: relative;
    }
    .steps-grid::before {
        content: '';
        position: absolute;
        top: 40px;
        left: 60px;
        right: 60px;
        height: 2px;
        background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent), transparent);
        opacity: 0.3;
    }
    .step-item {
        text-align: center;
        padding: 32px 20px;
        background: var(--clr-card);
        border-radius: var(--radius-md);
        border: 1px solid var(--clr-border);
        position: relative;
        transition: all var(--transition);
    }
    .step-item:hover {
        background: var(--clr-card-hover);
        border-color: var(--clr-border-hover);
        transform: translateY(-4px);
    }
    .step-item .step-num {
        width: 48px;
        height: 48px;
        border-radius: 50%;
        background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-dark));
        color: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        font-weight: 800;
        margin: 0 auto 16px;
        position: relative;
        z-index: 2;
    }
    .step-item h4 {
        font-size: 1.05rem;
        margin-bottom: 8px;
    }
    .step-item p {
        font-size: 0.85rem;
        color: var(--clr-text-secondary);
    }

    /* ===== FAQ ===== */
    .faq-list {
        max-width: 800px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .faq-item {
        background: var(--clr-card);
        border-radius: var(--radius-sm);
        border: 1px solid var(--clr-border);
        overflow: hidden;
        transition: all var(--transition);
    }
    .faq-item:hover {
        border-color: var(--clr-border-hover);
    }
    .faq-item .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 18px 24px;
        font-weight: 600;
        font-size: 0.95rem;
        cursor: pointer;
        transition: background var(--transition);
        gap: 12px;
    }
    .faq-item .faq-question:hover {
        background: rgba(255, 255, 255, 0.02);
    }
    .faq-item .faq-question i {
        color: var(--clr-primary);
        transition: transform var(--transition);
        flex-shrink: 0;
    }
    .faq-item .faq-answer {
        padding: 0 24px 18px;
        font-size: 0.9rem;
        color: var(--clr-text-secondary);
        line-height: 1.7;
        display: none;
    }
    .faq-item.open .faq-answer {
        display: block;
    }
    .faq-item.open .faq-question i {
        transform: rotate(180deg);
    }

    /* ===== CTA ===== */
    .cta-section {
        background: var(--clr-bg-alt);
        border-top: 1px solid var(--clr-border);
        border-bottom: 1px solid var(--clr-border);
    }
    .cta-box {
        text-align: center;
        padding: 64px 32px;
        background: var(--clr-card);
        border-radius: var(--radius-lg);
        border: 1px solid var(--clr-border);
        position: relative;
        overflow: hidden;
    }
    .cta-box::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: radial-gradient(circle at center, rgba(231, 76, 60, 0.06), transparent 60%);
        pointer-events: none;
    }
    .cta-box h2 {
        margin-bottom: 16px;
    }
    .cta-box p {
        max-width: 520px;
        margin: 0 auto 32px;
        color: var(--clr-text-secondary);
    }
    .cta-box .btn {
        position: relative;
        z-index: 2;
    }

    /* ===== 分类卡片（封面） ===== */
    .category-cards {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .cat-card {
        position: relative;
        border-radius: var(--radius-md);
        overflow: hidden;
        background: var(--clr-card);
        border: 1px solid var(--clr-border);
        transition: all var(--transition);
        aspect-ratio: 16 / 10;
    }
    .cat-card img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.5s ease;
    }
    .cat-card:hover img {
        transform: scale(1.05);
    }
    .cat-card .overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(0deg, rgba(11, 14, 23, 0.9) 0%, rgba(11, 14, 23, 0.2) 60%, transparent 100%);
        display: flex;
        flex-direction: column;
        justify-content: flex-end;
        padding: 24px;
    }
    .cat-card .overlay h3 {
        font-size: 1.2rem;
        font-weight: 700;
        margin-bottom: 6px;
        color: #fff;
    }
    .cat-card .overlay p {
        font-size: 0.85rem;
        color: rgba(255, 255, 255, 0.7);
    }
    .cat-card .overlay .tag {
        display: inline-block;
        padding: 2px 12px;
        border-radius: 12px;
        background: var(--clr-primary);
        color: #fff;
        font-size: 0.7rem;
        font-weight: 600;
        margin-bottom: 10px;
        align-self: flex-start;
    }
    .cat-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
        border-color: var(--clr-border-hover);
    }

    /* ===== 标签 ===== */
    .tag {
        display: inline-block;
        padding: 4px 14px;
        border-radius: 14px;
        background: rgba(231, 76, 60, 0.08);
        color: var(--clr-primary-light);
        font-size: 0.78rem;
        font-weight: 500;
        transition: all var(--transition);
    }
    .tag:hover {
        background: rgba(231, 76, 60, 0.15);
    }

    /* ===== 分隔线 ===== */
    .divider {
        height: 1px;
        background: var(--clr-border);
        margin: 0;
        border: none;
    }

    /* ===== 页脚 ===== */
    .footer {
        background: var(--clr-nav);
        border-top: 1px solid var(--clr-border);
        padding: 48px 0 32px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 32px;
        margin-bottom: 32px;
    }
    .footer-brand h4 {
        font-size: 1.2rem;
        font-weight: 800;
        margin-bottom: 12px;
        background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .footer-brand p {
        font-size: 0.85rem;
        color: var(--clr-text-muted);
        max-width: 300px;
        line-height: 1.7;
    }
    .footer-col h5 {
        font-size: 0.9rem;
        font-weight: 600;
        margin-bottom: 16px;
        color: var(--clr-text);
    }
    .footer-col ul li {
        margin-bottom: 10px;
    }
    .footer-col ul li a {
        font-size: 0.85rem;
        color: var(--clr-text-muted);
        transition: color var(--transition);
    }
    .footer-col ul li a:hover {
        color: var(--clr-primary);
    }
    .footer-bottom {
        padding-top: 24px;
        border-top: 1px solid var(--clr-border);
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 0.78rem;
        color: var(--clr-text-muted);
    }
    .footer-bottom a {
        color: var(--clr-text-muted);
    }
    .footer-bottom a:hover {
        color: var(--clr-primary);
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .grid-4 {
            grid-template-columns: repeat(2, 1fr);
        }
        .stats-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .steps-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .steps-grid::before {
            display: none;
        }
        .footer-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }

    @media (max-width: 768px) {
        .sidebar {
            transform: translateX(-100%);
        }
        .sidebar.open {
            transform: translateX(0);
        }
        .sidebar-overlay.active {
            display: block;
        }
        .mobile-header {
            display: flex;
        }
        .main-content {
            margin-left: 0;
            width: 100%;
            padding-top: var(--header-height);
        }
        .hero {
            padding: 80px 0 60px;
            min-height: auto;
        }
        .section {
            padding: 56px 0;
        }
        .features-grid {
            grid-template-columns: 1fr;
        }
        .category-cards {
            grid-template-columns: 1fr;
        }
        .grid-2,
        .grid-3,
        .grid-4 {
            grid-template-columns: 1fr;
        }
        .stats-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        .steps-grid {
            grid-template-columns: 1fr 1fr;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }
        .footer-bottom {
            flex-direction: column;
            text-align: center;
        }
        .hero-actions {
            flex-direction: column;
            align-items: stretch;
        }
        .hero-actions .btn {
            justify-content: center;
        }
        .news-item {
            flex-direction: column;
            padding: 16px;
        }
        .news-item .thumb {
            width: 100%;
            height: 140px;
        }
        .stat-item .number {
            font-size: 2rem;
        }
        .container {
            padding: 0 16px;
        }
    }

    @media (max-width: 520px) {
        .stats-grid {
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }
        .steps-grid {
            grid-template-columns: 1fr;
        }
        .hero-content h1 {
            font-size: 1.8rem;
        }
        .section-header h2 {
            font-size: 1.4rem;
        }
        .cta-box {
            padding: 40px 20px;
        }
        .stat-item {
            padding: 20px 12px;
        }
        .stat-item .number {
            font-size: 1.8rem;
        }
    }

    /* ===== 工具类 ===== */
    .text-center {
        text-align: center;
    }
    .mt-16 {
        margin-top: 16px;
    }
    .mt-24 {
        margin-top: 24px;
    }
    .mt-32 {
        margin-top: 32px;
    }
    .gap-16 {
        gap: 16px;
    }
    .flex-center {
        display: flex;
        align-items: center;
        justify-content: center;
    }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #d32f2f;
            --primary-dark: #b71c1c;
            --primary-light: #ef5350;
            --accent: #ff6f00;
            --accent-dark: #e65100;
            --bg-dark: #0a0e17;
            --bg-card: #111827;
            --bg-surface: #1a2332;
            --bg-input: #1e293b;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: #1e293b;
            --border-light: #334155;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.4);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
            --header-height: 0px;
        }

        /* ===== Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
        }
        a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        button { cursor: pointer; background: none; color: inherit; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }

        /* ===== 侧边栏 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-card);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition);
            overflow-y: auto;
        }
        .sidebar-logo {
            padding: 28px 24px 20px;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .sidebar-logo .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            flex-shrink: 0;
        }
        .sidebar-logo .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            line-height: 1.2;
        }
        .sidebar-logo .logo-text span { color: var(--primary-light); }
        .sidebar-nav { padding: 16px 12px; flex: 1; display: flex; flex-direction: column; gap: 4px; }
        .sidebar-nav .nav-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 15px;
            transition: all var(--transition);
            position: relative;
        }
        .sidebar-nav .nav-item i { width: 20px; text-align: center; font-size: 16px; }
        .sidebar-nav .nav-item:hover { background: var(--bg-surface); color: var(--text-primary); }
        .sidebar-nav .nav-item.active {
            background: rgba(211, 47, 47, 0.15);
            color: var(--primary-light);
            font-weight: 600;
        }
        .sidebar-nav .nav-item.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 8px;
            bottom: 8px;
            width: 3px;
            background: var(--primary);
            border-radius: 0 3px 3px 0;
        }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-color);
            font-size: 12px;
            color: var(--text-muted);
            text-align: center;
        }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== 移动端顶部栏 ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-color);
            z-index: 999;
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
        }
        .mobile-header .menu-toggle {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            font-size: 20px;
            color: var(--text-secondary);
            transition: background var(--transition);
        }
        .mobile-header .menu-toggle:hover { background: var(--bg-surface); }
        .mobile-header .mobile-logo {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
        }
        .mobile-header .mobile-logo span { color: var(--primary-light); }
        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.6);
            z-index: 989;
            backdrop-filter: blur(4px);
        }
        .mobile-overlay.open { display: block; }

        /* ===== 文章详情 ===== */
        .article-banner {
            position: relative;
            padding: 60px 0 40px;
            background: linear-gradient(135deg, rgba(10,14,23,0.95) 0%, rgba(26,35,50,0.9) 100%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-bottom: 1px solid var(--border-color);
        }
        .article-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, transparent 60%, var(--bg-dark) 100%);
            pointer-events: none;
        }
        .article-banner .container { position: relative; z-index: 1; }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a { color: var(--text-secondary); }
        .article-breadcrumb a:hover { color: var(--primary-light); }
        .article-breadcrumb .sep { color: var(--text-muted); }
        .article-category-badge {
            display: inline-block;
            background: rgba(211,47,47,0.2);
            color: var(--primary-light);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
            border: 1px solid rgba(211,47,47,0.3);
        }
        .article-title {
            font-size: clamp(26px, 4vw, 44px);
            font-weight: 800;
            line-height: 1.25;
            color: #fff;
            max-width: 900px;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 8px;
        }
        .article-meta span { display: flex; align-items: center; gap: 6px; }
        .article-meta i { color: var(--primary-light); font-size: 14px; }

        /* ===== 正文容器 ===== */
        .article-body-wrap {
            padding: 48px 0 60px;
            flex: 1;
        }
        .article-body {
            max-width: 820px;
            margin: 0 auto;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 40px 48px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }
        .article-body .content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-body .content p {
            margin-bottom: 20px;
        }
        .article-body .content h2 {
            font-size: 24px;
            margin-top: 40px;
            margin-bottom: 16px;
            color: #fff;
            border-left: 4px solid var(--primary);
            padding-left: 16px;
        }
        .article-body .content h3 {
            font-size: 20px;
            margin-top: 32px;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .article-body .content ul, .article-body .content ol {
            margin-bottom: 20px;
            padding-left: 24px;
        }
        .article-body .content li {
            margin-bottom: 8px;
            list-style: disc;
            color: var(--text-secondary);
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--accent);
            background: var(--bg-surface);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body .content img {
            margin: 24px 0;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }
        .article-body .content a { color: var(--primary-light); text-decoration: underline; text-underline-offset: 3px; }
        .article-body .content a:hover { color: var(--accent); }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .article-not-found .icon {
            font-size: 64px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .article-not-found h2 { font-size: 28px; margin-bottom: 12px; }
        .article-not-found p { color: var(--text-secondary); margin-bottom: 24px; font-size: 16px; }
        .article-not-found .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 12px 32px;
            border-radius: var(--radius-md);
            font-weight: 600;
            transition: all var(--transition);
        }
        .article-not-found .btn-back:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }

        /* ===== 文章底部导航 ===== */
        .article-footer-nav {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-footer-nav a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-size: 14px;
            transition: color var(--transition);
        }
        .article-footer-nav a:hover { color: var(--primary-light); }

        /* ===== 相关文章 ===== */
        .related-section {
            padding: 0 0 60px;
        }
        .related-section .section-title {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-section .section-title i { color: var(--primary-light); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 20px;
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: all var(--transition);
        }
        .related-card:hover { border-color: var(--border-light); transform: translateY(-3px); box-shadow: var(--shadow-md); }
        .related-card .rc-cat {
            font-size: 12px;
            color: var(--primary-light);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }
        .related-card h4 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
        .related-card h4 a { color: var(--text-primary); }
        .related-card h4 a:hover { color: var(--primary-light); }
        .related-card .rc-meta { font-size: 12px; color: var(--text-muted); }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
            margin-top: auto;
        }
        .footer .container { padding: 0 48px; max-width: 1280px; margin: 0 auto; }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand h4 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand h4 span { color: var(--primary-light); }
        .footer-brand p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; max-width: 340px; }
        .footer-col h5 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .footer-col ul { display: flex; flex-direction: column; gap: 10px; }
        .footer-col ul li a, .footer-col ul li span {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-col ul li a:hover { color: var(--primary-light); }
        .footer-col ul li i { width: 16px; color: var(--primary-light); font-size: 13px; }
        .footer-bottom {
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a { color: var(--text-secondary); }
        .footer-bottom a:hover { color: var(--primary-light); }

        /* ===== 容器 ===== */
        .container { padding: 0 48px; max-width: 1280px; margin: 0 auto; width: 100%; }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .container { padding: 0 32px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }

        @media (max-width: 768px) {
            .sidebar { transform: translateX(-100%); }
            .sidebar.open { transform: translateX(0); }
            .mobile-header { display: flex; }
            .main-content { margin-left: 0; padding-top: 60px; }
            .mobile-overlay.open { display: block; }

            .container { padding: 0 20px; }
            .article-body { padding: 24px 20px; border-radius: var(--radius-md); }
            .article-banner { padding: 40px 0 32px; }
            .article-title { font-size: 24px; }
            .article-meta { gap: 12px; font-size: 13px; }

            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer .container { padding: 0 20px; }
            .footer-bottom { flex-direction: column; text-align: center; }

            .related-grid { grid-template-columns: 1fr; }
            .article-footer-nav { flex-direction: column; align-items: flex-start; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-body { padding: 20px 16px; }
            .article-title { font-size: 20px; }
            .article-breadcrumb { font-size: 12px; }
            .article-meta { flex-direction: column; gap: 6px; }
            .footer .container { padding: 0 16px; }
            .sidebar-logo { padding: 20px 16px; }
            .sidebar-nav .nav-item { padding: 10px 14px; font-size: 14px; }
        }

        /* ===== 滚动条 ===== */
        .sidebar::-webkit-scrollbar { width: 4px; }
        .sidebar::-webkit-scrollbar-track { background: transparent; }
        .sidebar::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 4px; }
        .sidebar::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

        /* ===== 工具类 ===== */
        .text-center { text-align: center; }
        .mt-8 { margin-top: 8px; }
        .mb-8 { margin-bottom: 8px; }
        .gap-4 { gap: 4px; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --clr-primary: #0a1628;
            --clr-primary-light: #1a2a4a;
            --clr-secondary: #e63946;
            --clr-secondary-hover: #c1121f;
            --clr-accent: #f4a261;
            --clr-bg: #f4f6f8;
            --clr-card: #ffffff;
            --clr-text: #1a1a2e;
            --clr-text-light: #6c757d;
            --clr-text-muted: #9ca3af;
            --clr-border: #e5e7eb;
            --clr-shadow: rgba(0, 0, 0, 0.06);
            --clr-shadow-hover: rgba(0, 0, 0, 0.12);
            --clr-overlay: rgba(10, 22, 40, 0.7);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px var(--clr-shadow);
            --shadow-md: 0 6px 24px var(--clr-shadow);
            --shadow-lg: 0 12px 48px var(--clr-shadow-hover);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
            --header-height: 64px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--clr-text);
            background: var(--clr-bg);
            min-height: 100vh;
            display: flex;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--clr-secondary);
        }
        a:focus-visible {
            outline: 2px solid var(--clr-secondary);
            outline-offset: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--clr-text);
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
        }
        h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 0.8rem;
            color: var(--clr-text-light);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* ===== App Shell 布局 ===== */
        .app-shell {
            display: flex;
            min-height: 100vh;
            width: 100%;
        }

        /* ===== 左侧导航 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--clr-primary);
            color: #fff;
            display: flex;
            flex-direction: column;
            z-index: 1000;
            overflow-y: auto;
            padding: 0 0 24px 0;
            transition: transform var(--transition);
            box-shadow: 2px 0 20px rgba(0, 0, 0, 0.15);
        }
        .sidebar-logo {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            flex-shrink: 0;
        }
        .sidebar-logo h2 {
            font-size: 1.25rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
            line-height: 1.3;
        }
        .sidebar-logo h2 span {
            color: var(--clr-secondary);
        }
        .sidebar-logo p {
            font-size: 0.7rem;
            color: rgba(255, 255, 255, 0.4);
            margin-top: 4px;
            letter-spacing: 1px;
            text-transform: uppercase;
        }
        .sidebar-nav {
            padding: 16px 12px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.65);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            position: relative;
        }
        .sidebar-nav .nav-item i {
            width: 20px;
            text-align: center;
            font-size: 1.05rem;
            flex-shrink: 0;
        }
        .sidebar-nav .nav-item:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
        }
        .sidebar-nav .nav-item.active {
            background: var(--clr-secondary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.35);
        }
        .sidebar-nav .nav-item.active::before {
            content: '';
            position: absolute;
            left: -12px;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 28px;
            background: var(--clr-secondary);
            border-radius: 0 4px 4px 0;
        }
        .sidebar-nav .nav-divider {
            height: 1px;
            background: rgba(255, 255, 255, 0.06);
            margin: 12px 16px;
        }
        .sidebar-footer-mini {
            padding: 16px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.7rem;
            color: rgba(255, 255, 255, 0.3);
            text-align: center;
            flex-shrink: 0;
        }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== 移动端顶部栏 ===== */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 999;
            background: var(--clr-primary);
            color: #fff;
            padding: 0 16px;
            height: var(--header-height);
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .mobile-header .logo-text {
            font-size: 1.1rem;
            font-weight: 800;
            color: #fff;
        }
        .mobile-header .logo-text span {
            color: var(--clr-secondary);
        }
        .mobile-menu-toggle {
            font-size: 1.4rem;
            color: #fff;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .mobile-menu-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        /* ===== 移动端抽屉菜单 ===== */
        .drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1100;
            opacity: 0;
            transition: opacity var(--transition);
            pointer-events: none;
        }
        .drawer-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }
        .drawer-menu {
            position: fixed;
            top: 0;
            left: 0;
            width: 280px;
            height: 100vh;
            background: var(--clr-primary);
            color: #fff;
            z-index: 1200;
            transform: translateX(-100%);
            transition: transform var(--transition);
            padding: 24px 20px;
            overflow-y: auto;
            display: flex;
            flex-direction: column;
        }
        .drawer-menu.open {
            transform: translateX(0);
        }
        .drawer-menu .drawer-close {
            align-self: flex-end;
            font-size: 1.4rem;
            color: rgba(255, 255, 255, 0.6);
            padding: 4px 8px;
            margin-bottom: 16px;
        }
        .drawer-menu .drawer-close:hover {
            color: #fff;
        }
        .drawer-menu .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1;
        }
        .drawer-menu .drawer-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
            font-size: 1rem;
            transition: all var(--transition);
        }
        .drawer-menu .drawer-nav a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
        }
        .drawer-menu .drawer-nav a.active {
            background: var(--clr-secondary);
            color: #fff;
        }
        .drawer-menu .drawer-footer {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 16px;
            font-size: 0.7rem;
            color: rgba(255, 255, 255, 0.3);
            text-align: center;
        }

        /* ===== Hero/Banner ===== */
        .category-hero {
            position: relative;
            padding: 80px 0 72px;
            background: var(--clr-primary);
            overflow: hidden;
            min-height: 340px;
            display: flex;
            align-items: center;
        }
        .category-hero .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.25;
            z-index: 1;
        }
        .category-hero .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 22, 40, 0.85) 0%, rgba(10, 22, 40, 0.4) 100%);
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--clr-secondary);
            color: #fff;
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.3);
        }
        .category-hero h1 {
            color: #fff;
            font-size: clamp(2.2rem, 5vw, 3.4rem);
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .category-hero h1 span {
            color: var(--clr-secondary);
        }
        .category-hero p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.1rem;
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .category-hero .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 2px solid transparent;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--clr-secondary);
            color: #fff;
            border-color: var(--clr-secondary);
        }
        .btn-primary:hover {
            background: var(--clr-secondary-hover);
            border-color: var(--clr-secondary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(230, 57, 70, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(230, 57, 70, 0.25);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.3);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline-light:active {
            transform: translateY(0);
        }
        .btn-outline-secondary {
            background: transparent;
            color: var(--clr-secondary);
            border-color: var(--clr-secondary);
        }
        .btn-outline-secondary:hover {
            background: var(--clr-secondary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(230, 57, 70, 0.25);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--clr-card);
        }
        .section-dark {
            background: var(--clr-primary);
            color: #fff;
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark .section-subtitle {
            color: #fff;
        }
        .section-dark .section-subtitle {
            color: rgba(255, 255, 255, 0.6);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 48px;
            height: 3px;
            background: var(--clr-secondary);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-header .section-subtitle {
            color: var(--clr-text-light);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* ===== 网格 ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--clr-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--clr-border);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .card-image {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            background: var(--clr-border);
        }
        .card-body {
            padding: 20px 22px 24px;
        }
        .card-body h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            transition: color var(--transition);
        }
        .card-body h3 a:hover {
            color: var(--clr-secondary);
        }
        .card-body p {
            font-size: 0.9rem;
            color: var(--clr-text-light);
            margin-bottom: 12px;
            line-height: 1.6;
        }
        .card-body .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 12px;
        }
        .card-body .card-meta {
            font-size: 0.8rem;
            color: var(--clr-text-muted);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .card-body .card-meta i {
            margin-right: 4px;
        }

        /* ===== 标签/徽章 ===== */
        .tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 50px;
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            background: var(--clr-bg);
            color: var(--clr-text-light);
            border: 1px solid var(--clr-border);
            transition: all var(--transition);
        }
        .tag:hover {
            background: var(--clr-secondary);
            color: #fff;
            border-color: var(--clr-secondary);
        }
        .tag-hot {
            background: rgba(230, 57, 70, 0.1);
            color: var(--clr-secondary);
            border-color: rgba(230, 57, 70, 0.2);
        }
        .tag-new {
            background: rgba(244, 162, 97, 0.1);
            color: #d97706;
            border-color: rgba(244, 162, 97, 0.2);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 2px 10px;
            border-radius: 50px;
            font-size: 0.7rem;
            font-weight: 600;
            background: var(--clr-secondary);
            color: #fff;
        }
        .badge-outline {
            background: transparent;
            border: 1px solid var(--clr-border);
            color: var(--clr-text-light);
        }

        /* ===== 攻略分类卡片 ===== */
        .guide-card {
            background: var(--clr-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--clr-border);
            position: relative;
        }
        .guide-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .guide-card .guide-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            background: var(--clr-border);
        }
        .guide-card .guide-overlay {
            position: relative;
        }
        .guide-card .guide-overlay .guide-label {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--clr-secondary);
            color: #fff;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        }
        .guide-card .guide-body {
            padding: 18px 20px 22px;
        }
        .guide-card .guide-body h3 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .guide-card .guide-body p {
            font-size: 0.85rem;
            color: var(--clr-text-light);
            margin-bottom: 12px;
            line-height: 1.6;
        }
        .guide-card .guide-body .guide-stats {
            display: flex;
            gap: 16px;
            font-size: 0.75rem;
            color: var(--clr-text-muted);
        }
        .guide-card .guide-body .guide-stats i {
            margin-right: 4px;
        }

        /* ===== 列表文章 ===== */
        .article-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .article-item {
            display: flex;
            gap: 20px;
            background: var(--clr-card);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--clr-border);
            transition: all var(--transition);
            align-items: flex-start;
        }
        .article-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .article-item .article-thumb {
            width: 120px;
            height: 80px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--clr-border);
        }
        .article-item .article-info {
            flex: 1;
            min-width: 0;
        }
        .article-item .article-info h4 {
            font-size: 1rem;
            margin-bottom: 4px;
            font-weight: 600;
            line-height: 1.4;
        }
        .article-item .article-info h4 a:hover {
            color: var(--clr-secondary);
        }
        .article-item .article-info p {
            font-size: 0.85rem;
            color: var(--clr-text-light);
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-item .article-info .article-meta {
            font-size: 0.75rem;
            color: var(--clr-text-muted);
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .article-item .article-info .article-meta i {
            margin-right: 4px;
        }
        .article-item .article-info .article-meta .tag {
            font-size: 0.65rem;
            padding: 1px 10px;
        }

        /* ===== 步骤流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--clr-card);
            border-radius: var(--radius-md);
            padding: 32px 20px 28px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--clr-border);
            transition: all var(--transition);
            position: relative;
        }
        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .step-card .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--clr-secondary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.3);
        }
        .step-card h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.85rem;
            color: var(--clr-text-light);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }
        .stat-card .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--clr-secondary);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-card .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
        }
        .stat-card .stat-icon {
            font-size: 1.8rem;
            color: rgba(255, 255, 255, 0.15);
            margin-bottom: 12px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--clr-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--clr-border);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-item .faq-question {
            padding: 18px 22px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--clr-text);
            transition: color var(--transition);
            user-select: none;
        }
        .faq-item .faq-question:hover {
            color: var(--clr-secondary);
        }
        .faq-item .faq-question i {
            transition: transform var(--transition);
            font-size: 0.85rem;
            color: var(--clr-text-muted);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.9rem;
            color: var(--clr-text-light);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--clr-primary);
            position: relative;
            overflow: hidden;
        }
        .cta-section .cta-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            color: #fff;
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-section .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--clr-primary);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer .footer-brand h4 {
            color: #fff;
            font-size: 1.15rem;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .footer .footer-brand h4 span {
            color: var(--clr-secondary);
        }
        .footer .footer-brand p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer .footer-col h5 {
            color: #fff;
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer .footer-col ul li a,
        .footer .footer-col ul li span {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition);
        }
        .footer .footer-col ul li a:hover {
            color: var(--clr-secondary);
        }
        .footer .footer-col ul li i {
            width: 18px;
            margin-right: 6px;
            color: var(--clr-secondary);
        }
        .footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: rgba(255, 255, 259, 0.4);
        }
        .footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition);
        }
        .footer .footer-bottom a:hover {
            color: var(--clr-secondary);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--clr-text-muted);
            padding: 16px 0 0;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--clr-text-muted);
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--clr-secondary);
        }
        .breadcrumb .sep {
            color: var(--clr-border);
        }
        .breadcrumb .current {
            color: var(--clr-text);
            font-weight: 600;
        }

        /* ===== 分隔线 ===== */
        .divider {
            height: 1px;
            background: var(--clr-border);
            margin: 0;
            border: none;
        }

        /* ===== 动画 ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-in {
            animation: fadeInUp 0.6s ease-out forwards;
        }
        .fade-in-delay-1 {
            animation-delay: 0.1s;
        }
        .fade-in-delay-2 {
            animation-delay: 0.2s;
        }
        .fade-in-delay-3 {
            animation-delay: 0.3s;
        }

        /* ===== 响应式 ===== */

        /* 平板 1024px */
        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .main-content {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
            .drawer-overlay {
                display: block;
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        /* 平板 768px */
        @media (max-width: 768px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-2 {
                grid-template-columns: 1fr;
            }
            .category-hero {
                padding: 56px 0 48px;
                min-height: 280px;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .category-hero p {
                font-size: 0.95rem;
            }
            .section {
                padding: 48px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .article-item {
                flex-direction: column;
            }
            .article-item .article-thumb {
                width: 100%;
                height: 160px;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* 手机 520px */
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .grid-4,
            .grid-3,
            .grid-2 {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card .stat-number {
                font-size: 1.8rem;
            }
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .category-hero .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .category-hero .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .cta-section .cta-actions {
                flex-direction: column;
                align-items: center;
            }
            .cta-section .cta-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .article-item .article-thumb {
                height: 120px;
            }
            .footer .footer-grid {
                gap: 20px;
            }
            .section {
                padding: 36px 0;
            }
            .section-header {
                margin-bottom: 24px;
            }
            .section-header h2 {
                font-size: 1.3rem;
            }
            .breadcrumb {
                font-size: 0.75rem;
                padding: 12px 0 0;
            }
            .guide-card .guide-body {
                padding: 14px 16px 18px;
            }
            .card-body {
                padding: 16px 16px 20px;
            }
            .step-card {
                padding: 24px 16px 20px;
            }
        }

        /* 桌面端显示侧边栏 */
        @media (min-width: 1025px) {
            .sidebar {
                transform: translateX(0) !important;
            }
            .drawer-overlay,
            .drawer-menu {
                display: none !important;
            }
            .mobile-header {
                display: none !important;
            }
        }