:root {
      --primary: #38bdf8;
      --accent: #a78bfa;
      --bg-dark: #0f172a;
      --text-light: #e2e8f0;
      --card-bg: rgba(30, 41, 59, 0.7);
      --border-glow: rgba(56, 189, 248, 0.3);
      --shadow-heavy: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
    }

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

    body {
      background-color: var(--bg-dark);
      color: var(--text-light);
      font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      line-height: 1.75;
      letter-spacing: 0.02em;
      overflow-x: hidden;
    }

    /* 渐变光晕背景层 */
    .bg-glow {
      position: fixed;
      top: 0; left: 0; width: 100%; height: 100%;
      background:
        radial-gradient(circle at 20% 30%, rgba(56, 189, 248, 0.12), transparent 25%),
        radial-gradient(circle at 90% 70%, rgba(167, 139, 250, 0.1), transparent 30%),
        radial-gradient(circle at 50% 100%, rgba(30, 41, 59, 0.4), transparent 40%);
      z-index: -2;
      pointer-events: none;
    }
    .bg-glow::after {
      content: '';
      position: absolute;
      inset: 0;
      background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><filter id="noise"><feTurbulence type="fractalNoise" baseFrequency="0.8" numOctaves="3" stitchTiles="stitch"/></filter><rect width="100" height="100" filter="url(%23noise)" opacity="0.04"/></svg>');
      opacity: 0.6;
      z-index: -1;
    }

    /* 拟物厚重细节 */
    .neomorphic {
      background: linear-gradient(145deg, rgba(30,41,59,0.8), rgba(15,23,42,0.95));
      box-shadow: 8px 8px 20px rgba(0,0,0,0.7), -4px -4px 12px rgba(56,189,248,0.08);
      border: 1px solid rgba(148, 163, 184, 0.1);
    }

    .card-3d {
      background: var(--card-bg);
      backdrop-filter: blur(8px);
      border-radius: 1.2rem;
      box-shadow: var(--shadow-heavy);
      border: 1px solid rgba(148, 163, 184, 0.15);
      transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
      will-change: transform, border-color;
    }
    .card-3d:hover {
      transform: scale(1.02);
      border-color: var(--border-glow);
      box-shadow: 0 30px 60px -15px rgba(56,189,248,0.2);
    }

    /* 导航栏 */
    .navbar-custom {
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(56, 189, 248, 0.2);
      box-shadow: 0 10px 30px -15px rgba(0,0,0,0.6);
    }
    .navbar-brand {
      font-weight: 900;
      font-size: 1.8rem;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
      text-shadow: 2px 2px 10px rgba(56,189,248,0.3);
    }
    .nav-link-custom {
      color: var(--text-light) !important;
      font-weight: 500;
      margin: 0 0.5rem;
      position: relative;
      transition: color 0.2s;
    }
    .nav-link-custom::after {
      content: '';
      position: absolute;
      left: 0; bottom: -4px;
      width: 0%; height: 2px;
      background: linear-gradient(90deg, var(--primary), var(--accent));
      transition: width 0.3s;
    }
    .nav-link-custom:hover::after {
      width: 100%;
    }

    /* Hero 视差区 */
    .hero-section {
      position: relative;
      min-height: 88vh;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
      isolation: isolate;
    }
    .hero-bg {
      position: absolute;
      inset: -10% -10% -10% -10%;
      background-image: url('{随机图片}');
      background-size: cover;
      background-position: center 40%;
      transform: translateZ(0) scale(1.1);
      z-index: -2;
      filter: brightness(0.45) saturate(1.2);
    }
    /* 模拟视差层 */
    .hero-bg::after {
      content: '';
      position: absolute;
      top: 0; left: 0; width: 100%; height: 100%;
      background: radial-gradient(circle at 70% 20%, rgba(167,139,250,0.2), transparent 60%);
      mix-blend-mode: screen;
    }
    .hero-content {
      text-align: center;
      padding: 2rem 1rem;
      position: relative;
      z-index: 2;
      text-shadow: 0 8px 30px rgba(0,0,0,0.9);
    }
    .hero-title {
      font-size: clamp(3rem, 12vw, 6.5rem);
      font-weight: 900;
      background: linear-gradient(120deg, #38bdf8 20%, #a78bfa 50%, #38bdf8 90%);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 1rem;
      filter: drop-shadow(0 8px 12px rgba(56,189,248,0.2));
      letter-spacing: -0.03em;
    }
    .hero-sub {
      font-size: 1.4rem;
      font-weight: 300;
      max-width: 800px;
      margin: 0 auto 2.5rem;
      color: #cbd5e1;
    }

    /* 浮动装饰元素 */
    .float-deco {
      position: absolute;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(56,189,248,0.4), transparent 70%);
      width: 300px; height: 300px;
      top: 20%; left: 10%;
      filter: blur(40px);
      z-index: -1;
      animation: float 12s infinite alternate ease-in-out;
    }
    .float-deco2 {
      top: 60%; left: 80%;
      background: radial-gradient(circle, rgba(167,139,250,0.4), transparent 70%);
      animation-duration: 18s;
      width: 400px; height: 400px;
    }
    @keyframes float {
      0% { transform: translate(0, 0) scale(1); }
      100% { transform: translate(30px, -40px) scale(1.2); }
    }

    /* 通用区块标题 */
    .section-title {
      font-size: 2.6rem;
      font-weight: 800;
      margin-bottom: 2.5rem;
      position: relative;
      display: inline-block;
      background: linear-gradient(145deg, var(--text-light), #94a3b8);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
      text-shadow: 0 10px 20px rgba(0,0,0,0.3);
    }

    /* 对比表格 */
    .comparison-table {
      background: var(--card-bg);
      border-radius: 1.5rem;
      padding: 1.5rem;
      box-shadow: var(--shadow-heavy);
      border: 1px solid #334155;
    }
    .comparison-table .row {
      border-bottom: 1px solid #334155;
      padding: 0.8rem 0;
      align-items: center;
    }
    .comparison-table .row:last-child { border-bottom: none; }

    /* 编号清单 */
    .numbered-list {
      counter-reset: item;
      list-style: none;
      padding: 0;
    }
    .numbered-list li {
      counter-increment: item;
      font-size: 1.1rem;
      padding: 0.8rem 0 0.8rem 3rem;
      position: relative;
      border-bottom: 1px dashed #334155;
    }
    .numbered-list li::before {
      content: counter(item, decimal-leading-zero);
      position: absolute;
      left: 0;
      top: 0.8rem;
      font-weight: 800;
      font-size: 1.5rem;
      background: linear-gradient(145deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* FAQ手风琴样式（自定义） */
    .faq-item {
      background: rgba(15,23,42,0.5);
      border-radius: 1rem;
      padding: 1rem 1.5rem;
      margin-bottom: 1rem;
      border-left: 4px solid var(--primary);
      box-shadow: 0 8px 20px rgba(0,0,0,0.3);
    }
    .faq-question {
      font-weight: 700;
      font-size: 1.2rem;
      color: #e2e8f0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    /* 页脚 */
    .footer-custom {
      background: #0b1120;
      border-top: 1px solid #1e293b;
      padding: 3rem 0;
      margin-top: 5rem;
    }
    .footer-links a {
      color: #94a3b8;
      margin: 0 0.5rem;
      text-decoration: none;
    }
    .footer-links a:hover { color: var(--primary); }

    /* 懒加载渐显占位 */
    .lazy-placeholder {
      background: linear-gradient(110deg, #1e293b 30%, #334155 50%, #1e293b 70%);
      background-size: 200% 100%;
      animation: shimmer 1.8s infinite linear;
    }
    @keyframes shimmer {
      0% { background-position: 200% 0; }
      100% { background-position: -200% 0; }
    }

    /* 平滑滚动 */
    html { scroll-behavior: smooth; }

    /* 移动端适配 */
    @media (max-width: 768px) {
      .hero-title { font-size: 3rem; }
      .section-title { font-size: 2rem; }
      .comparison-table .row { font-size: 0.9rem; }
    }

/* --- 子页面追加 --- */
/* 本页专属小样式,自动合并进站点CSS */
        .about-hero {
            padding: 120px 0 80px;
            position: relative;
        }
.about-card {
            background: var(--card-bg);
            border: 1px solid var(--border-glow);
            border-radius: 16px;
            padding: 2rem;
            backdrop-filter: blur(12px);
            height: 100%;
            transition: transform .3s ease, box-shadow .3s ease;
        }
.about-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-heavy);
        }
.about-card i {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 1rem;
        }
.stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
.stat-label {
            color: var(--text-light);
            opacity: .8;
            font-size: .9rem;
        }
.timeline {
            position: relative;
            padding-left: 2rem;
        }
.timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(to bottom, var(--primary), var(--accent));
        }
.timeline-item {
            position: relative;
            margin-bottom: 2rem;
        }
.timeline-item::before {
            content: '';
            position: absolute;
            left: -1.85rem;
            top: .5rem;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--primary);
            border: 2px solid var(--bg-dark);
        }
.timeline-year {
            font-weight: 700;
            color: var(--accent);
            font-size: .95rem;
        }
.about-quote {
            border-left: 4px solid var(--accent);
            padding-left: 1.5rem;
            font-style: italic;
            color: var(--text-light);
            opacity: .9;
            margin: 2rem 0;
        }

/* --- 子页面追加 --- */
/* 排行榜专属样式 */
        .rank-badge {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            min-width: 42px;
            height: 42px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            box-shadow: 0 0 15px var(--border-glow);
        }
.rank-card {
            background: var(--card-bg);
            border: 1px solid var(--border-glow);
            border-radius: 16px;
            padding: 1.5rem;
            margin-bottom: 1.25rem;
            backdrop-filter: blur(8px);
            transition: transform .3s, box-shadow .3s;
        }
.rank-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-heavy);
        }
.rank-title {
            color: var(--text-light);
            font-weight: 700;
            font-size: 1.15rem;
            margin-bottom: .35rem;
        }
.rank-meta {
            color: var(--primary);
            font-size: .85rem;
            font-weight: 500;
        }
.rank-desc {
            color: var(--text-light);
            opacity: .8;
            font-size: .95rem;
            line-height: 1.6;
            margin-top: .5rem;
        }
.rank-tag {
            display: inline-block;
            background: rgba(56, 189, 248, .15);
            color: var(--primary);
            padding: .2rem .7rem;
            border-radius: 20px;
            font-size: .75rem;
            font-weight: 500;
            margin-right: .4rem;
            margin-top: .6rem;
        }
.rank-stat {
            color: var(--accent);
            font-size: .8rem;
            font-weight: 500;
            margin-top: .6rem;
            display: inline-block;
            margin-right: 1rem;
        }
.rank-stat i {
            margin-right: .3rem;
            color: var(--primary);
        }
.top-3 {
            border-color: var(--accent);
            box-shadow: 0 0 25px rgba(167, 139, 250, .2);
        }
.top-3 .rank-badge {
            background: linear-gradient(135deg, #fbbf24, #f59e0b);
        }
.section-divider {
            border: none;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
            margin: 2rem 0;
        }
.rank-note {
            background: rgba(167, 139, 250, .08);
            border-left: 3px solid var(--accent);
            padding: .8rem 1rem;
            border-radius: 0 10px 10px 0;
            color: var(--text-light);
            font-size: .9rem;
            margin: 2rem 0;
        }
.rank-card { padding: 1.1rem; }
.rank-badge { min-width: 36px; height: 36px; font-size: .95rem; }

/* --- 子页面追加 --- */
/* 本页专属小范围补充样式，自动合并进站点CSS */
    .guide-hero {
      background: linear-gradient(135deg, rgba(56, 189, 248, 0.15), rgba(167, 139, 250, 0.12));
    }
.guide-card {
      background: var(--card-bg);
      border: 1px solid var(--border-glow);
      border-radius: 16px;
      padding: 28px;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
.guide-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-heavy);
    }
.guide-card i {
      color: var(--primary);
      font-size: 2rem;
      margin-bottom: 16px;
    }
.guide-card h3 {
      color: var(--primary);
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 12px;
    }
.guide-card p {
      color: var(--text-light);
      opacity: 0.9;
      font-size: 0.95rem;
      line-height: 1.7;
    }
.step-badge {
      display: inline-block;
      background: rgba(56, 189, 248, 0.15);
      border: 1px solid var(--border-glow);
      color: var(--primary);
      font-weight: 600;
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      margin-bottom: 16px;
    }
.reading-order-list {
      list-style: none;
      padding: 0;
      counter-reset: order;
    }
.reading-order-list li {
      counter-increment: order;
      padding: 16px 16px 16px 56px;
      background: var(--card-bg);
      border: 1px solid var(--border-glow);
      border-radius: 12px;
      margin-bottom: 12px;
      position: relative;
      color: var(--text-light);
      transition: border-color 0.3s;
    }
.reading-order-list li::before {
      content: counter(order);
      position: absolute;
      left: 16px;
      top: 50%;
      transform: translateY(-50%);
      width: 28px;
      height: 28px;
      background: rgba(56, 189, 248, 0.2);
      border: 1px solid var(--border-glow);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      color: var(--primary);
      font-size: 0.9rem;
    }
.reading-order-list li:hover {
      border-color: var(--primary);
    }
.tip-box {
      background: rgba(167, 139, 250, 0.08);
      border-left: 4px solid var(--accent);
      border-radius: 0 12px 12px 0;
      padding: 18px 20px;
      margin: 20px 0;
      color: var(--text-light);
      font-size: 0.95rem;
    }
.tip-box i {
      color: var(--accent);
      margin-right: 8px;
    }
.nav-link-custom.active {
      color: var(--primary) !important;
      text-shadow: 0 0 20px var(--border-glow);
    }

/* --- 子页面追加 --- */
/* 本页专属样式 */
        .legal-section {
            background: var(--card-bg);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: 16px;
            padding: 2rem;
            margin-bottom: 1.5rem;
            backdrop-filter: blur(12px);
            transition: border-color 0.3s ease;
        }
.legal-section:hover {
            border-color: var(--border-glow);
        }
.legal-section h2 {
            color: var(--primary);
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
.legal-section h2 i {
            font-size: 1.2rem;
            color: var(--accent);
        }
.legal-section p, .legal-section li {
            color: var(--text-light);
            line-height: 1.8;
            font-size: 0.95rem;
            opacity: 0.9;
        }
.legal-section ul, .legal-section ol {
            padding-left: 1.5rem;
            margin-bottom: 1rem;
        }
.legal-section li {
            margin-bottom: 0.5rem;
        }
.legal-section strong {
            color: var(--primary);
        }
.legal-section .highlight-box {
            background: rgba(56, 189, 248, 0.08);
            border-left: 4px solid var(--primary);
            padding: 1rem 1.25rem;
            border-radius: 0 8px 8px 0;
            margin: 1.5rem 0;
        }
.legal-section .highlight-box p {
            margin-bottom: 0;
        }
.disclaimer-hero {
            padding: 4rem 0 2rem;
            text-align: center;
        }
.disclaimer-hero .hero-title {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
.disclaimer-hero .hero-sub {
            color: var(--text-light);
            opacity: 0.8;
            max-width: 700px;
            margin: 0 auto;
            font-size: 1.1rem;
        }
.last-updated {
            text-align: center;
            color: var(--text-light);
            opacity: 0.6;
            font-size: 0.9rem;
            margin-bottom: 2.5rem;
        }
.toc-box {
            background: rgba(167, 139, 250, 0.06);
            border: 1px solid rgba(167, 139, 250, 0.2);
            border-radius: 12px;
            padding: 1.5rem 2rem;
            margin-bottom: 2.5rem;
        }
.toc-box h3 {
            color: var(--accent);
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }
.toc-box ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 0.5rem;
        }
.toc-box a {
            color: var(--text-light);
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
.toc-box a:hover {
            color: var(--primary);
        }
.toc-box a i {
            font-size: 0.7rem;
            color: var(--primary);
        }
.contact-note {
            background: linear-gradient(135deg, rgba(56, 189, 248, 0.1), rgba(167, 139, 250, 0.1));
            border: 1px solid rgba(56, 189, 248, 0.3);
            border-radius: 12px;
            padding: 1.5rem;
            margin-top: 2rem;
            text-align: center;
        }
.contact-note p {
            margin-bottom: 0.5rem;
        }
.contact-note a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
        }
.contact-note a:hover {
            text-decoration: underline;
        }
.disclaimer-hero .hero-title {
                font-size: 1.8rem;
            }
.legal-section {
                padding: 1.5rem;
            }
.toc-box ul {
                grid-template-columns: 1fr;
            }