/* roulang page: index */
/* ===== 设计变量 ===== */
    :root {
        --primary: #0f172a;
        --primary-light: #1e293b;
        --primary-dark: #070b14;
        --accent: #f59e0b;
        --accent-light: #fbbf24;
        --accent-dark: #d97706;
        --blue: #3b82f6;
        --blue-light: #60a5fa;
        --blue-dark: #2563eb;
        --bg: #f8fafc;
        --bg-alt: #f1f5f9;
        --bg-card: #ffffff;
        --text: #1e293b;
        --text-light: #64748b;
        --text-lighter: #94a3b8;
        --border: #e2e8f0;
        --border-light: #f1f5f9;
        --radius: 16px;
        --radius-sm: 8px;
        --radius-lg: 24px;
        --shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
        --shadow-lg: 0 12px 48px rgba(15, 23, 42, 0.10);
        --shadow-glow: 0 4px 32px rgba(245, 158, 11, 0.25);
        --transition: 0.30s cubic-bezier(0.4, 0, 0.2, 1);
        --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        --nav-height: 72px;
        --max-width: 1200px;
        --gap: 24px;
        --gap-lg: 48px;
    }
    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
    body {
        font-family: var(--font);
        font-size: 16px;
        line-height: 1.7;
        color: var(--text);
        background: var(--bg);
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--blue); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--blue-dark); }
    button, input, textarea { font-family: inherit; font-size: inherit; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--primary); }
    h1 { font-size: clamp(2.2rem, 5.5vw, 3.8rem); }
    h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); margin-bottom: 16px; }
    h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
    p { margin-bottom: 16px; color: var(--text-light); }
    .container {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 20px;
    }
    /* ===== 导航 ===== */
    header {
        position: fixed;
        top: 0; left: 0; right: 0;
        z-index: 1000;
        height: var(--nav-height);
        background: rgba(15, 23, 42, 0.55);
        backdrop-filter: blur(20px) saturate(1.4);
        -webkit-backdrop-filter: blur(20px) saturate(1.4);
        border-bottom: 1px solid rgba(255,255,255,0.08);
        box-shadow: 0 2px 20px rgba(0,0,0,0.08);
        transition: background var(--transition), box-shadow var(--transition);
    }
    header.scrolled {
        background: rgba(15, 23, 42, 0.88);
        box-shadow: 0 4px 32px rgba(0,0,0,0.18);
    }
    .nav-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 20px;
    }
    .nav-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.35rem;
        font-weight: 800;
        color: #fff;
        letter-spacing: -0.5px;
    }
    .nav-logo i {
        color: var(--accent);
        font-size: 1.6rem;
    }
    .nav-logo span { color: #fff; }
    .nav-links {
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .nav-links a {
        padding: 8px 18px;
        border-radius: var(--radius-sm);
        color: rgba(255,255,255,0.75);
        font-weight: 500;
        font-size: 0.92rem;
        transition: all var(--transition);
        position: relative;
    }
    .nav-links a:hover { color: #fff; background: rgba(255,255,255,0.10); }
    .nav-links a.active {
        color: #fff;
        background: rgba(245, 158, 11, 0.18);
        box-shadow: inset 0 0 0 1px rgba(245, 158, 11, 0.20);
    }
    .nav-cta {
        padding: 8px 22px;
        border-radius: var(--radius-sm);
        background: var(--accent);
        color: var(--primary) !important;
        font-weight: 700;
        font-size: 0.92rem;
        transition: all var(--transition);
        box-shadow: var(--shadow-glow);
    }
    .nav-cta:hover { background: var(--accent-light); transform: translateY(-1px); box-shadow: 0 6px 32px rgba(245,158,11,0.35); }
    .nav-toggle { display: none; background: none; border: none; color: #fff; font-size: 1.6rem; cursor: pointer; padding: 4px; }
    /* ===== 移动端导航 ===== */
    @media (max-width: 768px) {
        .nav-links {
            position: fixed;
            top: var(--nav-height); left: 0; right: 0;
            background: rgba(15, 23, 42, 0.96);
            backdrop-filter: blur(20px);
            flex-direction: column;
            padding: 20px 24px 28px;
            gap: 4px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            transform: translateY(-120%);
            opacity: 0;
            transition: all 0.4s cubic-bezier(0.4,0,0.2,1);
            pointer-events: none;
            border-radius: 0 0 var(--radius) var(--radius);
        }
        .nav-links.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: all;
        }
        .nav-links a { padding: 12px 16px; width: 100%; font-size: 1rem; }
        .nav-toggle { display: block; }
        .nav-cta { margin-top: 6px; text-align: center; }
    }
    /* ===== Hero ===== */
    .hero {
        position: relative;
        min-height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        padding: 120px 20px 80px;
        background: var(--primary);
        overflow: hidden;
    }
    .hero-bg {
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        opacity: 0.35;
        mix-blend-mode: overlay;
        pointer-events: none;
    }
    .hero-overlay {
        position: absolute;
        inset: 0;
        background: radial-gradient(ellipse at 30% 40%, rgba(245,158,11,0.10) 0%, transparent 60%),
                    radial-gradient(ellipse at 70% 70%, rgba(59,130,246,0.08) 0%, transparent 50%),
                    linear-gradient(180deg, rgba(15,23,42,0.30) 0%, var(--primary) 100%);
        pointer-events: none;
    }
    .hero-content {
        position: relative;
        z-index: 2;
        max-width: 820px;
    }
    .hero h1 {
        color: #fff;
        font-weight: 800;
        letter-spacing: -1px;
        margin-bottom: 20px;
        text-shadow: 0 2px 40px rgba(0,0,0,0.30);
    }
    .hero h1 .highlight {
        background: linear-gradient(135deg, var(--accent), var(--accent-light));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .hero p {
        font-size: clamp(1.05rem, 2vw, 1.25rem);
        color: rgba(255,255,255,0.70);
        max-width: 640px;
        margin: 0 auto 32px;
        line-height: 1.8;
    }
    .hero-buttons {
        display: flex;
        flex-wrap: wrap;
        gap: 16px;
        justify-content: center;
    }
    .btn {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 14px 32px;
        border-radius: var(--radius-sm);
        font-weight: 600;
        font-size: 1rem;
        border: none;
        cursor: pointer;
        transition: all var(--transition);
        text-decoration: none;
    }
    .btn-primary {
        background: var(--accent);
        color: var(--primary);
        box-shadow: var(--shadow-glow);
    }
    .btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 40px rgba(245,158,11,0.35); color: var(--primary); }
    .btn-outline {
        background: transparent;
        color: #fff;
        border: 1.5px solid rgba(255,255,255,0.25);
        backdrop-filter: blur(4px);
    }
    .btn-outline:hover { background: rgba(255,255,255,0.10); border-color: rgba(255,255,255,0.45); color: #fff; transform: translateY(-2px); }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 6px 18px;
        border-radius: 40px;
        background: rgba(255,255,255,0.08);
        backdrop-filter: blur(8px);
        border: 1px solid rgba(255,255,255,0.10);
        color: rgba(255,255,255,0.70);
        font-size: 0.85rem;
        font-weight: 500;
        margin-bottom: 24px;
    }
    .hero-badge i { color: var(--accent); }
    /* ===== 板块通用 ===== */
    .section {
        padding: 80px 0;
    }
    .section-alt { background: var(--bg-alt); }
    .section-title {
        text-align: center;
        margin-bottom: 48px;
    }
    .section-title h2 {
        position: relative;
        display: inline-block;
    }
    .section-title h2::after {
        content: '';
        display: block;
        width: 56px;
        height: 4px;
        background: var(--accent);
        border-radius: 4px;
        margin: 12px auto 0;
    }
    .section-title p {
        max-width: 560px;
        margin: 10px auto 0;
        color: var(--text-light);
    }
    /* ===== 特色卡片 ===== */
    .features-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
        gap: var(--gap);
    }
    .feature-card {
        background: var(--bg-card);
        border-radius: var(--radius);
        padding: 32px 28px;
        box-shadow: var(--shadow);
        border: 1px solid var(--border);
        transition: all var(--transition);
    }
    .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
    .feature-card .icon {
        width: 56px; height: 56px;
        border-radius: 14px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.6rem;
        margin-bottom: 18px;
        background: rgba(245,158,11,0.10);
        color: var(--accent);
    }
    .feature-card h3 { margin-bottom: 10px; font-size: 1.2rem; }
    .feature-card p { font-size: 0.95rem; margin-bottom: 0; color: var(--text-light); }
    /* ===== 分类卡片 ===== */
    .category-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: var(--gap);
    }
    .category-card {
        position: relative;
        border-radius: var(--radius);
        overflow: hidden;
        background: var(--bg-card);
        box-shadow: var(--shadow);
        border: 1px solid var(--border);
        transition: all var(--transition);
        cursor: pointer;
    }
    .category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
    .category-card .card-img {
        width: 100%;
        height: 200px;
        object-fit: cover;
        display: block;
    }
    .category-card .card-body {
        padding: 24px 22px 26px;
    }
    .category-card .tag {
        display: inline-block;
        padding: 4px 14px;
        border-radius: 20px;
        font-size: 0.78rem;
        font-weight: 600;
        background: rgba(245,158,11,0.12);
        color: var(--accent-dark);
        margin-bottom: 10px;
    }
    .category-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
    .category-card p { font-size: 0.92rem; color: var(--text-light); margin-bottom: 0; }
    .category-card .card-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        margin-top: 14px;
        font-weight: 600;
        font-size: 0.92rem;
        color: var(--blue);
    }
    .category-card .card-link i { transition: transform var(--transition); }
    .category-card:hover .card-link i { transform: translateX(4px); }
    /* ===== 数据统计 ===== */
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: var(--gap);
        text-align: center;
    }
    .stat-item {
        padding: 32px 16px;
        background: var(--bg-card);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        border: 1px solid var(--border);
    }
    .stat-item .num {
        font-size: 2.6rem;
        font-weight: 800;
        color: var(--accent);
        line-height: 1.1;
    }
    .stat-item .label {
        font-size: 0.92rem;
        color: var(--text-light);
        margin-top: 6px;
    }
    /* ===== 资讯列表 ===== */
    .post-list {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: var(--gap);
    }
    .post-card {
        background: var(--bg-card);
        border-radius: var(--radius);
        overflow: hidden;
        box-shadow: var(--shadow);
        border: 1px solid var(--border);
        transition: all var(--transition);
    }
    .post-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
    .post-card .post-img {
        width: 100%;
        height: 190px;
        object-fit: cover;
    }
    .post-card .post-body {
        padding: 22px 22px 26px;
    }
    .post-card .post-meta {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 0.82rem;
        color: var(--text-lighter);
        margin-bottom: 10px;
    }
    .post-card .post-meta .cat {
        padding: 2px 12px;
        border-radius: 12px;
        background: rgba(59,130,246,0.08);
        color: var(--blue);
        font-weight: 600;
    }
    .post-card h3 { font-size: 1.08rem; margin-bottom: 8px; line-height: 1.4; }
    .post-card h3 a { color: var(--primary); }
    .post-card h3 a:hover { color: var(--blue); }
    .post-card p { font-size: 0.90rem; color: var(--text-light); margin-bottom: 0; }
    /* ===== 流程步骤 ===== */
    .steps-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--gap);
        counter-reset: step;
    }
    .step-item {
        text-align: center;
        padding: 32px 20px;
        background: var(--bg-card);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        border: 1px solid var(--border);
        position: relative;
        transition: all var(--transition);
    }
    .step-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
    .step-item .step-num {
        width: 48px; height: 48px;
        border-radius: 50%;
        background: var(--accent);
        color: var(--primary);
        font-weight: 800;
        font-size: 1.2rem;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 16px;
    }
    .step-item h4 { font-size: 1.05rem; margin-bottom: 6px; }
    .step-item p { font-size: 0.88rem; color: var(--text-light); margin-bottom: 0; }
    /* ===== FAQ ===== */
    .faq-list {
        max-width: 720px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .faq-item {
        background: var(--bg-card);
        border-radius: var(--radius-sm);
        border: 1px solid var(--border);
        overflow: hidden;
        transition: all var(--transition);
    }
    .faq-item:hover { border-color: var(--accent); }
    .faq-question {
        padding: 18px 24px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        cursor: pointer;
        font-weight: 600;
        font-size: 1rem;
        color: var(--text);
        background: none;
        border: none;
        width: 100%;
        text-align: left;
        transition: background var(--transition);
    }
    .faq-question:hover { background: rgba(245,158,11,0.04); }
    .faq-question i { color: var(--accent); transition: transform var(--transition); font-size: 0.9rem; }
    .faq-item.open .faq-question i { transform: rotate(180deg); }
    .faq-answer {
        padding: 0 24px 18px;
        font-size: 0.95rem;
        color: var(--text-light);
        line-height: 1.7;
        display: none;
    }
    .faq-item.open .faq-answer { display: block; }
    /* ===== CTA ===== */
    .cta-section {
        background: var(--primary);
        position: relative;
        overflow: hidden;
        padding: 80px 0;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
        opacity: 0.12;
        pointer-events: none;
    }
    .cta-inner {
        position: relative;
        z-index: 2;
        text-align: center;
        max-width: 600px;
        margin: 0 auto;
    }
    .cta-inner h2 { color: #fff; }
    .cta-inner p { color: rgba(255,255,255,0.65); }
    .cta-inner .btn { margin-top: 8px; }
    /* ===== 页脚 ===== */
    footer {
        background: var(--primary-dark);
        color: rgba(255,255,255,0.55);
        padding: 48px 0 32px;
        border-top: 1px solid rgba(255,255,255,0.04);
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
        margin-bottom: 32px;
    }
    .footer-brand .nav-logo { margin-bottom: 12px; }
    .footer-brand p { font-size: 0.88rem; color: rgba(255,255,255,0.45); max-width: 300px; }
    .footer-col h5 { color: #fff; font-size: 0.92rem; margin-bottom: 16px; font-weight: 600; }
    .footer-col a {
        display: block;
        padding: 4px 0;
        font-size: 0.88rem;
        color: rgba(255,255,255,0.45);
        transition: color var(--transition);
    }
    .footer-col a:hover { color: var(--accent); }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.06);
        padding-top: 20px;
        text-align: center;
        font-size: 0.82rem;
        color: rgba(255,255,255,0.30);
    }
    @media (max-width: 768px) {
        .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
        .footer-brand { grid-column: 1 / -1; }
    }
    @media (max-width: 520px) {
        .footer-grid { grid-template-columns: 1fr; gap: 20px; }
    }
    /* ===== 响应式断点 ===== */
    @media (max-width: 1024px) {
        .section { padding: 64px 0; }
        .features-grid { grid-template-columns: repeat(2, 1fr); }
        .category-grid { grid-template-columns: repeat(2, 1fr); }
        .post-list { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
        .section { padding: 48px 0; }
        .features-grid { grid-template-columns: 1fr; }
        .category-grid { grid-template-columns: 1fr; }
        .post-list { grid-template-columns: 1fr; }
        .stats-grid { grid-template-columns: repeat(2, 1fr); }
        .steps-grid { grid-template-columns: repeat(2, 1fr); }
        .hero { min-height: 90vh; padding: 100px 16px 60px; }
        .hero-buttons { flex-direction: column; align-items: center; }
        .btn { width: 100%; max-width: 320px; justify-content: center; }
    }
    @media (max-width: 520px) {
        .stats-grid { grid-template-columns: 1fr; }
        .steps-grid { grid-template-columns: 1fr; }
        .section-title h2 { font-size: 1.6rem; }
    }
    /* ===== 工具 ===== */
    .text-center { text-align: center; }
    .mt-8 { margin-top: 8px; }
    .mt-16 { margin-top: 16px; }
    .gap-8 { gap: 8px; }
    .empty-tip {
        text-align: center;
        padding: 40px 20px;
        color: var(--text-lighter);
        font-size: 0.95rem;
        background: var(--bg-card);
        border-radius: var(--radius);
        border: 1px dashed var(--border);
    }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a0a2e;
            --primary-light: #2d1b69;
            --secondary: #6c5ce7;
            --accent: #f9a826;
            --accent-light: #ffd93d;
            --bg: #f0f2f5;
            --bg-card: #ffffff;
            --bg-dark: #0d0d1a;
            --text: #1a1a2e;
            --text-light: #4a4a6a;
            --text-muted: #8888a0;
            --border: #e0e0ec;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 8px 32px rgba(26, 10, 46, 0.10);
            --shadow-hover: 0 16px 48px rgba(26, 10, 46, 0.18);
            --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--secondary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        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 { font-weight: 700; line-height: 1.3; color: var(--primary); }
        h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
        h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
        h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
        p { margin-bottom: 1rem; color: var(--text-light); }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        section { padding: 80px 0; }
        @media (max-width: 768px) { section { padding: 56px 0; } .container { padding: 0 16px; } }

        /* ===== Glass Header ===== */
        #header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(18px) saturate(180%);
            -webkit-backdrop-filter: blur(18px) saturate(180%);
            border-bottom: 1px solid rgba(255,255,255,0.20);
            box-shadow: 0 2px 20px rgba(0,0,0,0.06);
            transition: var(--transition);
        }
        #header.scrolled {
            background: rgba(255,255,255,0.92);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 4px 30px rgba(26,10,46,0.08);
        }
        .nav-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
        }
        .nav-logo i { color: var(--accent); font-size: 1.5rem; }
        .nav-logo span { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-logo:hover { color: var(--primary); transform: scale(1.02); }
        .nav-links { display: flex; align-items: center; gap: 8px; }
        .nav-links a {
            padding: 8px 18px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover { color: var(--primary); background: rgba(108,92,231,0.08); }
        .nav-links a.active { color: var(--secondary); background: rgba(108,92,231,0.12); font-weight: 600; }
        .nav-links a.nav-cta {
            background: linear-gradient(135deg, var(--secondary), var(--primary-light));
            color: #fff;
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(108,92,231,0.30);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(108,92,231,0.40); color: #fff; }
        .nav-toggle { display: none; font-size: 1.6rem; color: var(--primary); padding: 6px 10px; border-radius: 8px; }
        .nav-toggle:hover { background: rgba(108,92,231,0.08); }
        @media (max-width: 900px) {
            .nav-links { display: none; position: absolute; top: var(--header-height); left: 0; width: 100%; background: rgba(255,255,255,0.98); backdrop-filter: blur(18px); flex-direction: column; padding: 16px 24px 24px; gap: 6px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); }
            .nav-links.open { display: flex; }
            .nav-links a { width: 100%; padding: 12px 18px; border-radius: var(--radius-sm); }
            .nav-links a.nav-cta { justify-content: center; }
            .nav-toggle { display: block; }
        }
        @media (max-width: 520px) {
            .nav-logo span { font-size: 1.1rem; }
            .nav-inner { padding: 0 12px; }
        }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: 140px 0 80px;
            margin-top: 0;
            background: linear-gradient(135deg, rgba(26,10,46,0.85) 0%, rgba(45,27,105,0.70) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            min-height: 320px;
            display: flex;
            align-items: center;
            text-align: center;
            color: #fff;
        }
        .article-hero .container { position: relative; z-index: 2; }
        .article-hero h1 {
            color: #fff;
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            max-width: 900px;
            margin: 0 auto 16px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.25);
        }
        .article-hero .meta-line {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            color: rgba(255,255,255,0.85);
            font-size: 0.95rem;
        }
        .article-hero .meta-line i { margin-right: 6px; color: var(--accent); }
        .article-hero .meta-line .category-badge {
            background: var(--accent);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.85rem;
        }
        @media (max-width: 768px) {
            .article-hero { padding: 120px 0 56px; min-height: 240px; }
            .article-hero .meta-line { gap: 12px; font-size: 0.85rem; }
        }

        /* ===== Article Content ===== */
        .article-main { padding: 60px 0 80px; }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 48px 52px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .article-body .content { font-size: 1.05rem; line-height: 1.9; color: var(--text-light); }
        .article-body .content p { margin-bottom: 1.4rem; }
        .article-body .content h2, .article-body .content h3 { margin-top: 2rem; margin-bottom: 1rem; color: var(--primary); }
        .article-body .content ul, .article-body .content ol { margin-bottom: 1.4rem; padding-left: 24px; list-style: disc; }
        .article-body .content li { margin-bottom: 0.4rem; color: var(--text-light); }
        .article-body .content a { color: var(--secondary); font-weight: 500; border-bottom: 1px solid transparent; }
        .article-body .content a:hover { border-bottom-color: var(--secondary); }
        .article-body .content blockquote {
            border-left: 4px solid var(--secondary);
            padding: 16px 24px;
            margin: 1.6rem 0;
            background: rgba(108,92,231,0.05);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body .content img { border-radius: var(--radius-sm); margin: 1.6rem 0; box-shadow: var(--shadow); }
        .article-body .content .tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 2rem; padding: 0; }
        .article-body .content .tag-list li { list-style: none; }
        .article-body .content .tag-list a {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 50px;
            background: rgba(108,92,231,0.08);
            color: var(--secondary);
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid transparent;
        }
        .article-body .content .tag-list a:hover { background: var(--secondary); color: #fff; border-color: var(--secondary); }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .article-not-found i { font-size: 4rem; color: var(--text-muted); margin-bottom: 24px; }
        .article-not-found h2 { color: var(--primary); margin-bottom: 12px; }
        .article-not-found p { color: var(--text-muted); margin-bottom: 24px; }
        .article-not-found .btn-back { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px; border-radius: 50px; background: var(--secondary); color: #fff; font-weight: 600; box-shadow: 0 4px 16px rgba(108,92,231,0.30); }
        .article-not-found .btn-back:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(108,92,231,0.40); color: #fff; }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .sidebar-card h4 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--primary);
        }
        .sidebar-card h4 i { color: var(--accent); }
        .sidebar-list li { border-bottom: 1px solid var(--border); padding: 10px 0; }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a { display: block; font-weight: 500; color: var(--text-light); }
        .sidebar-list a:hover { color: var(--secondary); padding-left: 4px; }
        .sidebar-list .meta { font-size: 0.8rem; color: var(--text-muted); margin-top: 2px; }
        .sidebar-tags { display: flex; flex-wrap: wrap; gap: 8px; }
        .sidebar-tags a {
            padding: 6px 16px;
            border-radius: 50px;
            background: rgba(108,92,231,0.06);
            color: var(--text-light);
            font-size: 0.85rem;
            border: 1px solid var(--border);
            font-weight: 500;
        }
        .sidebar-tags a:hover { background: var(--secondary); color: #fff; border-color: var(--secondary); }
        .sidebar-cta-box {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            color: #fff;
        }
        .sidebar-cta-box h4 { color: #fff; margin-bottom: 12px; justify-content: center; }
        .sidebar-cta-box p { color: rgba(255,255,255,0.80); font-size: 0.95rem; margin-bottom: 20px; }
        .sidebar-cta-box .btn-cta {
            display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px;
            border-radius: 50px; background: var(--accent); color: var(--primary); font-weight: 700;
            box-shadow: 0 4px 16px rgba(249,168,38,0.40);
        }
        .sidebar-cta-box .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(249,168,38,0.50); color: var(--primary); }

        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-body { padding: 32px 28px; }
        }
        @media (max-width: 520px) {
            .article-body { padding: 24px 16px; }
            .sidebar-card { padding: 20px 16px; }
        }

        /* ===== Related Section ===== */
        .related-section { background: var(--bg-card); border-top: 1px solid var(--border); padding: 64px 0; }
        .related-section .section-title { text-align: center; margin-bottom: 40px; }
        .related-section .section-title h2 { margin-bottom: 8px; }
        .related-section .section-title p { color: var(--text-muted); max-width: 600px; margin: 0 auto; }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }
        .related-card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .related-card .card-img { height: 180px; background-size: cover; background-position: center; }
        .related-card .card-body { padding: 20px 20px 24px; }
        .related-card .card-body h3 { font-size: 1.05rem; margin-bottom: 8px; }
        .related-card .card-body h3 a { color: var(--primary); }
        .related-card .card-body h3 a:hover { color: var(--secondary); }
        .related-card .card-body p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .related-card .card-body .meta { font-size: 0.8rem; color: var(--text-muted); display: flex; gap: 16px; }

        /* ===== FAQ ===== */
        .faq-section { background: var(--bg); }
        .faq-section .section-title { text-align: center; margin-bottom: 48px; }
        .faq-section .section-title h2 { margin-bottom: 8px; }
        .faq-section .section-title p { color: var(--text-muted); max-width: 600px; margin: 0 auto; }
        .faq-grid { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            padding: 0 20px;
            transition: var(--transition);
        }
        .faq-item.active { box-shadow: var(--shadow); border-color: var(--secondary); }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 0;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            cursor: pointer;
        }
        .faq-question i { color: var(--secondary); transition: var(--transition); font-size: 1.1rem; }
        .faq-item.active .faq-question i { transform: rotate(180deg); color: var(--accent); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            border-top: 1px solid transparent;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 0 18px;
            border-top-color: var(--border);
        }
        .faq-answer p { font-size: 0.95rem; color: var(--text-light); margin-bottom: 0; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            padding: 80px 0;
            text-align: center;
            color: #fff;
        }
        .cta-section h2 { color: #fff; font-size: clamp(1.6rem, 3.5vw, 2.4rem); margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.85); font-size: 1.1rem; max-width: 640px; margin: 0 auto 28px; }
        .cta-section .btn-cta {
            display: inline-flex; align-items: center; gap: 10px; padding: 16px 40px;
            border-radius: 50px; background: var(--accent); color: var(--primary); font-weight: 700;
            font-size: 1.05rem; box-shadow: 0 6px 24px rgba(249,168,38,0.35);
            transition: var(--transition);
        }
        .cta-section .btn-cta:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(249,168,38,0.45); color: var(--primary); }

        /* ===== Footer ===== */
        footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.75);
            padding: 64px 0 0;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        footer .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .nav-logo { color: #fff; font-size: 1.3rem; margin-bottom: 16px; }
        .footer-brand .nav-logo span { background: linear-gradient(135deg, var(--accent-light), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .footer-brand p { font-size: 0.95rem; color: rgba(255,255,255,0.55); line-height: 1.7; max-width: 380px; }
        .footer-col h5 { color: #fff; font-size: 1rem; margin-bottom: 18px; font-weight: 600; }
        .footer-col a { display: block; color: rgba(255,255,255,0.55); font-size: 0.9rem; padding: 4px 0; transition: var(--transition); }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            text-align: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.35);
            margin-top: 0;
        }
        @media (max-width: 900px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            footer .container { padding: 0 16px; }
        }

        /* ===== Utilities ===== */
        .text-center { text-align: center; }
        .mt-12 { margin-top: 12px; }
        .mt-24 { margin-top: 24px; }
        .mb-24 { margin-bottom: 24px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        @media (max-width: 520px) {
            .article-hero h1 { font-size: 1.6rem; }
            .related-grid { grid-template-columns: 1fr; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #2d2d4e;
            --secondary: #e94560;
            --secondary-hover: #d63850;
            --accent: #f5a623;
            --accent-light: #f8c060;
            --bg: #f5f6fa;
            --bg-card: #ffffff;
            --bg-dark: #0f0f1a;
            --text: #1e1e2a;
            --text-light: #5a5a72;
            --text-white: #ffffff;
            --text-muted: #8a8aa0;
            --border: #e2e4ed;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.14);
            --shadow-nav: 0 4px 20px rgba(0, 0, 0, 0.06);
            --transition: 0.30s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
            --space-section: 80px;
            --space-section-mobile: 50px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }

        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            :root {
                --space-section: var(--space-section-mobile);
            }
        }

        /* ===== 导航 ===== */
        #header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(26, 26, 46, 0.72);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: var(--shadow-nav);
            transition: background var(--transition), box-shadow var(--transition);
        }

        #header.scrolled {
            background: rgba(26, 26, 46, 0.94);
            box-shadow: 0 4px 28px rgba(0, 0, 0, 0.20);
        }

        .nav-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.5px;
        }
        .nav-logo i {
            font-size: 28px;
            color: var(--secondary);
        }
        .nav-logo span {
            background: linear-gradient(135deg, #fff 60%, var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-toggle {
            display: none;
            font-size: 26px;
            color: var(--text-white);
            background: none;
            border: none;
            padding: 6px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-links a {
            color: rgba(255, 255, 255, 0.75);
            font-size: 15px;
            font-weight: 500;
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2.5px;
            border-radius: 4px;
            background: var(--secondary);
            transform: scaleX(0);
            transition: transform var(--transition);
        }
        .nav-links a:hover {
            color: #fff;
        }
        .nav-links a:hover::after {
            transform: scaleX(0.5);
        }
        .nav-links a.active {
            color: #fff;
        }
        .nav-links a.active::after {
            transform: scaleX(1);
        }
        .nav-links a.nav-cta {
            background: var(--secondary);
            color: #fff;
            padding: 8px 20px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: background var(--transition), transform var(--transition);
        }
        .nav-links a.nav-cta:hover {
            background: var(--secondary-hover);
            transform: translateY(-2px);
        }
        .nav-links a.nav-cta::after {
            display: none;
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-links {
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(26, 26, 46, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px 28px;
                gap: 14px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: transform 0.4s ease, opacity 0.4s ease;
                border-radius: 0 0 var(--radius) var(--radius);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                font-size: 17px;
                padding: 8px 0;
            }
            .nav-links a.nav-cta {
                align-self: flex-start;
                margin-top: 6px;
            }
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: calc(var(--header-h) + 40px) 24px 60px;
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.88), rgba(15, 15, 26, 0.92)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            color: var(--text-white);
        }
        .category-hero-content {
            max-width: 800px;
            position: relative;
            z-index: 2;
        }
        .category-hero h1 {
            font-size: 44px;
            font-weight: 800;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff 60%, var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero p {
            font-size: 19px;
            color: rgba(255, 255, 255, 0.80);
            max-width: 640px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(233, 69, 96, 0.20);
            border: 1px solid rgba(233, 69, 96, 0.30);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-light);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }
        .hero-actions .btn-primary {
            background: var(--secondary);
            color: #fff;
            padding: 12px 32px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 16px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: background var(--transition), transform var(--transition);
        }
        .hero-actions .btn-primary:hover {
            background: var(--secondary-hover);
            transform: translateY(-3px);
        }
        .hero-actions .btn-outline {
            background: transparent;
            color: #fff;
            padding: 12px 32px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 16px;
            border: 2px solid rgba(255, 255, 255, 0.30);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .hero-actions .btn-outline:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.60);
            transform: translateY(-3px);
        }

        @media (max-width: 768px) {
            .category-hero {
                min-height: 320px;
                padding: calc(var(--header-h) + 24px) 16px 40px;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .category-hero p {
                font-size: 16px;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline {
                padding: 10px 24px;
                font-size: 14px;
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: var(--space-section) 0;
        }
        .section-alt {
            background: var(--bg-card);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 34px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .section-title p {
            font-size: 17px;
            color: var(--text-light);
            max-width: 620px;
            margin: 0 auto;
        }
        .section-title.light h2 {
            color: var(--text-white);
        }
        .section-title.light p {
            color: rgba(255, 255, 255, 0.70);
        }
        .title-tag {
            display: inline-block;
            background: rgba(233, 69, 96, 0.10);
            color: var(--secondary);
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }

        @media (max-width: 768px) {
            .section-title h2 {
                font-size: 26px;
            }
            .section-title p {
                font-size: 15px;
            }
        }

        /* ===== 平台概述 ===== */
        .overview-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .overview-text h3 {
            font-size: 26px;
            margin-bottom: 16px;
        }
        .overview-text p {
            color: var(--text-light);
            margin-bottom: 16px;
            font-size: 16px;
        }
        .overview-text ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-top: 20px;
        }
        .overview-text ul li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            color: var(--text);
        }
        .overview-text ul li i {
            color: var(--secondary);
            font-size: 18px;
            width: 22px;
        }
        .overview-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            background: #eef0f5;
        }
        .overview-image img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        @media (max-width: 768px) {
            .overview-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .overview-image img {
                height: 220px;
            }
        }

        /* ===== 登录指南卡片 ===== */
        .guide-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px 28px;
            box-shadow: var(--shadow);
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--border);
            text-align: center;
        }
        .guide-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .guide-card .icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: rgba(233, 69, 96, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 26px;
            color: var(--secondary);
        }
        .guide-card h4 {
            font-size: 19px;
            margin-bottom: 10px;
        }
        .guide-card p {
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.6;
        }
        .guide-card .step-num {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 2px 12px;
            border-radius: 40px;
            margin-bottom: 12px;
        }

        @media (max-width: 992px) {
            .guide-cards {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .guide-cards {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 功能特色 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 20px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: transform var(--transition), box-shadow var(--transition);
            text-align: center;
        }
        .feature-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .feature-item i {
            font-size: 32px;
            color: var(--secondary);
            margin-bottom: 14px;
        }
        .feature-item h4 {
            font-size: 17px;
            margin-bottom: 6px;
        }
        .feature-item p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        @media (max-width: 992px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 使用流程 ===== */
        .flow-steps {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            counter-reset: step;
        }
        .flow-step {
            flex: 1 1 200px;
            max-width: 240px;
            text-align: center;
            position: relative;
        }
        .flow-step::after {
            content: '';
            position: absolute;
            top: 32px;
            left: 60%;
            width: 60%;
            height: 2px;
            background: linear-gradient(90deg, var(--secondary), transparent);
            opacity: 0.3;
        }
        .flow-step:last-child::after {
            display: none;
        }
        .flow-step .circle {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 700;
            margin: 0 auto 16px;
            border: 3px solid var(--secondary);
            box-shadow: 0 0 0 4px rgba(233, 69, 96, 0.15);
        }
        .flow-step h5 {
            font-size: 17px;
            margin-bottom: 6px;
            color: var(--text-white);
        }
        .flow-step p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.70);
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .flow-steps {
                flex-direction: column;
                align-items: center;
                gap: 28px;
            }
            .flow-step::after {
                display: none;
            }
            .flow-step {
                max-width: 320px;
                flex: none;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item.open {
            box-shadow: var(--shadow);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 16px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            color: var(--text);
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(233, 69, 96, 0.04);
        }
        .faq-question i {
            color: var(--secondary);
            transition: transform 0.3s ease;
            font-size: 14px;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 60px 0;
            background: linear-gradient(135deg, var(--primary), var(--bg-dark));
            text-align: center;
            color: var(--text-white);
        }
        .cta-section h2 {
            font-size: 32px;
            margin-bottom: 12px;
            color: #fff;
        }
        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-cta {
            background: var(--secondary);
            color: #fff;
            padding: 14px 40px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 17px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: background var(--transition), transform var(--transition);
        }
        .cta-section .btn-cta:hover {
            background: var(--secondary-hover);
            transform: translateY(-3px);
        }

        @media (max-width: 768px) {
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-section p {
                font-size: 15px;
            }
            .cta-section .btn-cta {
                padding: 12px 28px;
                font-size: 15px;
            }
        }

        /* ===== 页脚 ===== */
        footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.80);
            padding: 56px 0 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .nav-logo {
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.60);
            max-width: 300px;
            line-height: 1.7;
        }
        .footer-col h5 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.60);
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.40);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 通用工具 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== 图片遮盖保证可读 ===== */
        .img-cover {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ===== 文章卡片（用于内容列表） ===== */
        .post-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .post-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .post-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }
        .post-card .thumb {
            height: 200px;
            overflow: hidden;
            background: #eef0f5;
        }
        .post-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .post-card:hover .thumb img {
            transform: scale(1.06);
        }
        .post-card .body {
            padding: 20px 20px 24px;
        }
        .post-card .body .tag {
            display: inline-block;
            background: rgba(233, 69, 96, 0.08);
            color: var(--secondary);
            font-size: 12px;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 40px;
            margin-bottom: 10px;
        }
        .post-card .body h4 {
            font-size: 17px;
            margin-bottom: 8px;
        }
        .post-card .body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }
        .post-card .body .meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 14px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .post-card .body .meta i {
            margin-right: 4px;
        }

        @media (max-width: 992px) {
            .post-cards {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .post-cards {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 标签云 ===== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .tag-cloud a {
            display: inline-block;
            background: var(--bg-card);
            border: 1px solid var(--border);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 14px;
            color: var(--text-light);
            transition: all var(--transition);
        }
        .tag-cloud a:hover {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
            transform: translateY(-2px);
        }

        /* ===== 分类目录侧栏样式 ===== */
        .sidebar-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-bottom: 32px;
        }
        .sidebar-links a {
            padding: 8px 22px;
            border-radius: 40px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
        }
        .sidebar-links a:hover,
        .sidebar-links a.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }