:root {
    --primary: #38bdf8;
    --accent: #a78bfa;
    --bg: #0f172a;
    --text: #e2e8f0;
    --card-bg: #1e293b;
    --border-color: #334155;
    --text-muted: #94a3b8;
    --radius: 8px;
    --shadow: 0 4px 20px rgba(0,0,0,0.3);
  }
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.75;
    font-size: 16px;
    letter-spacing: 0.01em;
    overflow-x: hidden;
  }
  /* 顶部细微噪点纹理 */
  body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 250 250' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  }
  h1, h2, h3, h4, h5, h6 {
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.3;
    color: #fff;
  }
  .mono {
    font-family: 'SF Mono', 'Fira Code', 'Courier New', monospace;
    font-weight: 600;
  }
  .text-primary-custom { color: var(--primary) !important; }
  .text-accent-custom { color: var(--accent) !important; }
  .text-muted-custom { color: var(--text-muted) !important; }

  /* 左侧固定侧栏布局 */
  .layout-wrapper {
    display: flex;
    min-height: 100vh;
  }
  .sidebar {
    width: 220px;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(12px);
    border-right: 1px solid var(--border-color);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    padding: 24px 0;
    transition: transform 0.3s ease;
  }
  .sidebar-brand {
    padding: 12px 24px 20px;
    font-size: 1.5rem;
    font-weight: 900;
    color: #fff;
    letter-spacing: -0.02em;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .sidebar-brand i {
    color: var(--primary);
    font-size: 1.3rem;
  }
  .sidebar-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 0 12px;
    overflow-y: auto;
  }
  .sidebar-nav a {
    color: var(--text-muted);
    text-decoration: none;
    padding: 10px 16px;
    border-radius: var(--radius);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .sidebar-nav a i {
    width: 20px;
    text-align: center;
    color: var(--text-muted);
    transition: color 0.2s;
  }
  .sidebar-nav a:hover {
    color: var(--primary);
    background: rgba(56, 189, 248, 0.08);
  }
  .sidebar-nav a:hover i {
    color: var(--primary);
  }
  .sidebar-nav a.active {
    color: var(--primary);
    background: rgba(56, 189, 248, 0.1);
  }
  .sidebar-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-muted);
  }
  .main-content {
    flex: 1;
    margin-left: 220px;
    min-width: 0;
  }

  /* Hero 区域 */
  .hero {
    position: relative;
    min-height: 480px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, rgba(15,23,42,0.4), rgba(15,23,42,0.8)), url('{随机图片}') center/cover no-repeat;
    padding: 80px 20px;
  }
  .hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 0%, var(--bg) 100%);
    pointer-events: none;
  }
  .hero-content {
    position: relative;
    z-index: 2;
    max-width: 760px;
  }
  .hero h1 {
    font-size: 3.2rem;
    font-weight: 900;
    margin-bottom: 20px;
    text-shadow: 0 4px 30px rgba(0,0,0,0.5);
  }
  .hero p {
    font-size: 1.25rem;
    color: var(--text);
    opacity: 0.9;
    margin-bottom: 32px;
    font-weight: 300;
  }
  .hero-btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    border: none;
    padding: 14px 36px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius);
    text-decoration: none;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(56, 189, 248, 0.3);
  }
  .hero-btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
  }
  .hero-btn:hover::after {
    left: 100%;
  }
  .hero-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(56, 189, 248, 0.4);
  }

  /* 区块通用 */
  .section {
    padding: 64px 32px;
  }
  .section-header {
    margin-bottom: 40px;
  }
  .section-title {
    font-size: 1.75rem;
    margin-bottom: 8px;
    position: relative;
    display: inline-block;
  }
  .section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
  }
  .section-sub {
    color: var(--text-muted);
    font-size: 1rem;
    margin-top: 12px;
  }

  /* 数据统计 */
  .stats-section {
    padding: 48px 32px;
    border-bottom: 1px solid var(--border-color);
    border-top: 1px solid var(--border-color);
    background: rgba(30, 41, 59, 0.3);
  }
  .stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
  }
  .stat-item {
    text-align: center;
    padding: 24px 16px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    transition: transform 0.2s, border-color 0.2s;
  }
  .stat-item:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
  }
  .stat-number {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.2;
  }
  .stat-label {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 8px;
  }

  /* 说明步骤条 */
  .steps-section {
    padding: 64px 32px;
  }
  .steps-container {
    display: flex;
    gap: 32px;
    max-width: 1100px;
    margin: 0 auto;
    flex-wrap: wrap;
  }
  .step-card {
    flex: 1;
    min-width: 200px;
    position: relative;
    padding: 32px 24px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    transition: border-color 0.2s;
  }
  .step-card:hover {
    border-color: var(--accent);
  }
  .step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    color: #fff;
    margin-bottom: 16px;
  }
  .step-card h4 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    color: #fff;
  }
  .step-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
  }

  /* 特色卡片网格 */
  .features-section {
    padding: 64px 32px;
    background: rgba(30, 41, 59, 0.2);
  }
  .features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
  }
  .feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 32px 24px;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
    position: relative;
    overflow: hidden;
  }
  .feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow);
    border-color: var(--primary);
  }
  .feature-icon {
    width: 48px;
    height: 48px;
    border: 2px solid var(--primary);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--primary);
    font-size: 1.4rem;
    background: rgba(56, 189, 248, 0.05);
  }
  .feature-card h4 {
    font-size: 1.15rem;
    margin-bottom: 12px;
  }
  .feature-card p {
    color: var(--text-muted);
    font-size: 0.92rem;
  }

  /* FAQ */
  .faq-section {
    padding: 64px 32px;
    max-width: 800px;
    margin: 0 auto;
  }
  .faq-item {
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--card-bg);
  }
  .faq-question {
    padding: 20px 24px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.2s;
    color: #fff;
  }
  .faq-question:hover {
    background: rgba(56, 189, 248, 0.05);
  }
  .faq-question i {
    color: var(--primary);
    transition: transform 0.3s;
  }
  .faq-item[open] .faq-question i {
    transform: rotate(180deg);
  }
  .faq-answer {
    padding: 0 24px 20px;
    color: var(--text-muted);
    font-size: 0.95rem;
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
  }

  /* CTA */
  .cta-section {
    padding: 64px 32px;
    text-align: center;
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.1), rgba(167, 139, 250, 0.1));
    border-top: 1px solid var(--border-color);
  }
  .cta-section h2 {
    font-size: 2rem;
    margin-bottom: 16px;
  }
  .cta-section p {
    color: var(--text-muted);
    margin-bottom: 32px;
    font-size: 1.05rem;
  }

  /* 友情链接 */
  .friend-links {
    padding: 32px;
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
  }
  .friend-links h4 {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }
  .friend-links .links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.9rem;
  }

  /* 页脚 */
  .footer {
    padding: 40px 32px 24px;
    background: var(--bg);
    border-top: 1px solid var(--border-color);
  }
  .footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
  }
  .footer-brand {
    font-size: 1.3rem;
    font-weight: 800;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .footer-brand i {
    color: var(--primary);
  }
  .footer-links {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
  }
  .footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
  }
  .footer-links a:hover {
    color: var(--primary);
  }
  .footer-copy {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
  }

  /* 回到顶部 */
  .back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
    border-radius: var(--radius);
    background: var(--primary);
    color: #fff;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s, transform 0.2s;
    z-index: 999;
    box-shadow: 0 4px 16px rgba(56, 189, 248, 0.4);
  }
  .back-to-top.show {
    opacity: 1;
    visibility: visible;
  }
  .back-to-top:hover {
    transform: translateY(-4px);
  }

  /* 瀑布流卡片(右侧内容区) */
  .waterfall-section {
    padding: 32px 32px 64px;
  }
  .waterfall-grid {
    columns: 3;
    column-gap: 20px;
  }
  .waterfall-card {
    break-inside: avoid;
    margin-bottom: 20px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    transition: border-color 0.2s, transform 0.2s;
  }
  .waterfall-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
  }
  .waterfall-card img {
    width: 100%;
    height: auto;
    border-radius: calc(var(--radius) - 4px);
    margin-bottom: 12px;
    object-fit: cover;
  }
  .waterfall-card h5 {
    font-size: 1rem;
    margin-bottom: 8px;
  }
  .waterfall-card p {
    color: var(--text-muted);
    font-size: 0.85rem;
  }

  /* 响应式 */
  @media (max-width: 992px) {
    .sidebar {
      transform: translateX(-100%);
    }
    .sidebar.open {
      transform: translateX(0);
    }
    .main-content {
      margin-left: 0;
    }
    .features-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    .stats-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    .waterfall-grid {
      columns: 2;
    }
  }
  @media (max-width: 576px) {
    .hero h1 {
      font-size: 2rem;
    }
    .features-grid {
      grid-template-columns: 1fr;
    }
    .waterfall-grid {
      columns: 1;
    }
    .stats-grid {
      grid-template-columns: 1fr 1fr;
    }
  }

  /* 移动端菜单按钮 */
  .mobile-toggle {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 1100;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 8px 12px;
    color: var(--text);
    cursor: pointer;
  }
  @media (max-width: 992px) {
    .mobile-toggle {
      display: block;
    }
  }

  /* 数字动画 */
  .stat-number {
    display: inline-block;
  }

/* --- 子页面追加 --- */
/* 本页专属微调样式,自动合并进站点CSS */
        .about-hero { padding: 80px 0 40px; }
.about-section { padding: 48px 0; }
.about-section + .about-section { border-top: 1px solid var(--border-color); }
.about-title { font-size: 2.2rem; font-weight: 800; margin-bottom: 16px; color: var(--text); }
.about-lead { font-size: 1.1rem; color: var(--text-muted); line-height: 1.8; margin-bottom: 24px; }
.about-text { color: var(--text-muted); line-height: 1.9; font-size: 0.95rem; }
.about-text strong { color: var(--text); font-weight: 600; }
.about-text a { color: var(--primary); text-decoration: none; }
.about-text a:hover { text-decoration: underline; }
.feature-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(56, 189, 248, 0.1); color: var(--primary); border: 1px solid rgba(56, 189, 248, 0.3); padding: 6px 16px; border-radius: 20px; font-size: 0.85rem; font-weight: 500; margin-bottom: 12px; }
.about-icon-box { width: 48px; height: 48px; border-radius: var(--radius); display: flex; align-items: center; justify-content: center; background: rgba(167, 139, 250, 0.1); color: var(--accent); font-size: 1.3rem; margin-bottom: 16px; }
.timeline-item { position: relative; padding-left: 28px; margin-bottom: 32px; }
.timeline-item::before { content: ''; position: absolute; left: 0; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.15); }
.timeline-item::after { content: ''; position: absolute; left: 5px; top: 24px; bottom: -24px; width: 2px; background: var(--border-color); }
.timeline-item:last-child::after { display: none; }
.timeline-item h4 { color: var(--text); font-weight: 700; font-size: 1.1rem; margin-bottom: 8px; }
.timeline-item p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.8; }
.value-card { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: var(--radius); padding: 24px; height: 100%; transition: all 0.3s ease; }
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(56, 189, 248, 0.4); }
.value-card .icon { font-size: 1.8rem; margin-bottom: 16px; }
.value-card h3 { color: var(--text); font-size: 1.1rem; font-weight: 700; margin-bottom: 12px; }
.value-card p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.7; }

/* --- 子页面追加 --- */
/* 本页专属小范围样式：免责声明卡片布局与排版微调 */
        .disclaimer-hero {
            border-bottom: 1px solid var(--border-color);
        }
.disclaimer-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 2rem;
            margin-bottom: 1.8rem;
            transition: transform .2s ease;
        }
.disclaimer-card:hover {
            transform: translateY(-2px);
        }
.disclaimer-card h2 {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 1rem;
            letter-spacing: .3px;
            display: flex;
            align-items: center;
            gap: .6rem;
        }
.disclaimer-card h2 i {
            color: var(--accent);
            font-size: 1.1rem;
        }
.disclaimer-card p, .disclaimer-card li {
            color: var(--text-muted);
            font-size: .95rem;
            line-height: 1.8;
        }
.disclaimer-card strong {
            color: var(--text);
            font-weight: 600;
        }
.disclaimer-card ul {
            padding-left: 1.2rem;
            margin-bottom: .8rem;
        }
.disclaimer-card ul li {
            margin-bottom: .4rem;
        }
.last-updated {
            display: inline-block;
            background: rgba(56, 189, 248, .08);
            color: var(--primary);
            border: 1px solid rgba(56, 189, 248, .25);
            padding: .35rem 1rem;
            border-radius: 30px;
            font-size: .85rem;
            font-weight: 500;
            letter-spacing: .3px;
        }
.disclaimer-card {
                padding: 1.4rem;
            }

/* --- 子页面追加 --- */
/* 本页专属样式 — 隐私政策页 */
        .privacy-container {
            max-width: 860px;
            margin: 0 auto;
            padding: 40px 24px 80px;
        }
.privacy-hero {
            text-align: center;
            padding: 60px 20px 30px;
        }
.privacy-hero h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 16px;
            line-height: 1.3;
        }
.privacy-hero h1 .brand-highlight {
            color: var(--primary);
        }
.privacy-hero p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.8;
        }
.privacy-last-updated {
            display: inline-block;
            background: rgba(56, 189, 248, 0.1);
            border: 1px solid rgba(56, 189, 248, 0.25);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            margin-top: 16px;
        }
.privacy-section {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 28px 32px;
            margin-bottom: 24px;
            box-shadow: var(--shadow);
        }
.privacy-section h2 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid rgba(56, 189, 248, 0.2);
            display: flex;
            align-items: center;
            gap: 12px;
        }
.privacy-section h2 i {
            color: var(--primary);
            font-size: 1.2rem;
            width: 28px;
            text-align: center;
        }
.privacy-section h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--accent);
            margin-top: 20px;
            margin-bottom: 10px;
        }
.privacy-section p {
            color: var(--text-muted);
            line-height: 1.9;
            margin-bottom: 14px;
            font-size: 0.95rem;
        }
.privacy-section ul {
            color: var(--text-muted);
            line-height: 1.9;
            margin-bottom: 14px;
            padding-left: 20px;
            font-size: 0.95rem;
        }
.privacy-section ul li {
            margin-bottom: 6px;
        }
.privacy-section ul li::marker {
            color: var(--primary);
        }
.privacy-note {
            background: rgba(167, 139, 250, 0.08);
            border-left: 3px solid var(--accent);
            padding: 14px 20px;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 20px 0;
        }
.privacy-note p {
            margin-bottom: 0;
            color: var(--text);
            font-size: 0.9rem;
        }
.privacy-contact-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 12px;
        }
.privacy-contact-links a {
            color: var(--primary);
            text-decoration: none;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border: 1px solid var(--border-color);
            border-radius: 20px;
            transition: all 0.3s ease;
        }
.privacy-contact-links a:hover {
            border-color: var(--primary);
            background: rgba(56, 189, 248, 0.1);
        }
.privacy-contact-links a i {
            font-size: 0.85rem;
        }
.privacy-table-wrap {
            overflow-x: auto;
            margin: 16px 0;
        }
.privacy-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
        }
.privacy-table th {
            background: rgba(56, 189, 248, 0.1);
            color: var(--primary);
            font-weight: 600;
            padding: 12px 16px;
            text-align: left;
            border-bottom: 2px solid var(--primary);
        }
.privacy-table td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-muted);
            line-height: 1.7;
        }
.privacy-table tr:hover td {
            background: rgba(56, 189, 248, 0.03);
        }
.privacy-hero h1 { font-size: 1.8rem; }
.privacy-section { padding: 20px; }
.privacy-section h2 { font-size: 1.2rem; }