/* 配色变量 天青石灰 */
    :root {
      --primary: #0891b2;
      --accent: #0ea5e9;
      --bg: #ecfeff;
      --text: #083344;
      --white: #ffffff;
      --light-shadow: 0 12px 30px rgba(8, 145, 178, 0.08);
      --radius-card: 18px;
      --radius-pill: 999px;
    }

    * { box-sizing: border-box; }

    body {
      background-color: var(--bg);
      color: var(--text);
      font-family: 'Noto Sans SC', 'Inter', sans-serif;
      font-weight: 400;
      line-height: 1.7;
      margin: 0;
    }

    h1, h2, h3, .serif {
      font-family: 'Noto Serif SC', 'Inter', serif;
      font-weight: 900;
      letter-spacing: 0.02em;
    }

    /* 轻量整体布局：极简单列居中 */
    .container-narrow {
      max-width: 820px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 导航 */
    .navbar-custom {
      background: rgba(236, 254, 255, 0.8);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(8, 145, 178, 0.15);
      padding: 16px 0;
    }
    .navbar-brand {
      font-family: 'Noto Serif SC', serif;
      font-weight: 900;
      font-size: 1.8rem;
      color: var(--primary) !important;
      letter-spacing: 2px;
    }
    .nav-link-custom {
      font-weight: 500;
      color: var(--text) !important;
      margin: 0 12px;
      border-radius: var(--radius-pill);
      transition: 0.2s;
    }
    .nav-link-custom:hover {
      background: rgba(14, 165, 233, 0.1);
    }
    .navbar-toggler {
      border: 1px solid var(--primary);
    }

    /* HERO 视差 */
    .hero-parallax {
      background-image: url({随机图片}); /* 后续替换，先做占位 */
      background-size: cover;
      background-position: center;
      background-attachment: fixed; /* parallax */
      background-color: var(--bg);
      padding: 100px 0 80px;
      position: relative;
      text-align: center;
    }
    .hero-parallax::before {
      content: "";
      position: absolute;
      inset: 0;
      background: rgba(236, 254, 255, 0.7);
      backdrop-filter: brightness(1.05);
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero-badge {
      display: inline-block;
      background: var(--accent);
      color: #fff;
      padding: 6px 18px;
      border-radius: var(--radius-pill);
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 20px;
    }
    .hero-title {
      font-size: clamp(3rem, 7vw, 4.5rem);
      color: var(--text);
      line-height: 1.2;
      margin-bottom: 16px;
    }
    .hero-title span {
      color: var(--primary);
    }

    /* 大数字统计 */
    .stat-block {
      display: flex;
      justify-content: center;
      gap: 3rem;
      flex-wrap: wrap;
      margin-top: 30px;
    }
    .stat-item {
      background: rgba(255, 255, 255, 0.7);
      backdrop-filter: blur(6px);
      padding: 16px 28px;
      border-radius: var(--radius-card);
      box-shadow: var(--light-shadow);
      min-width: 130px;
    }
    .stat-number {
      font-size: 2.8rem;
      font-weight: 900;
      font-family: 'Noto Serif SC', serif;
      color: var(--primary);
      line-height: 1.2;
    }

    /* 区块 */
    .section {
      padding: 70px 0;
    }
    .section-subtitle {
      color: var(--primary);
      font-weight: 600;
      letter-spacing: 2px;
      text-transform: uppercase;
      font-size: 0.9rem;
    }

    /* 卡片 & 圆角 */
    .card-cute {
      background: var(--white);
      border: none;
      border-radius: var(--radius-card);
      box-shadow: var(--light-shadow);
      padding: 24px;
      transition: transform 0.2s;
    }
    .card-cute:hover {
      transform: translateY(-4px);
    }

    /* 时间线（使用说明） */
    .timeline {
      position: relative;
      padding-left: 30px;
      margin-top: 30px;
    }
    .timeline::before {
      content: "";
      position: absolute;
      left: 10px;
      top: 0;
      bottom: 0;
      width: 2px;
      background: var(--accent);
      opacity: 0.4;
    }
    .timeline-item {
      position: relative;
      margin-bottom: 32px;
    }
    .timeline-item::before {
      content: "";
      position: absolute;
      left: -24px;
      top: 8px;
      width: 14px;
      height: 14px;
      background: var(--primary);
      border-radius: 50%;
      border: 3px solid var(--bg);
    }
    .timeline-title {
      font-weight: 700;
      color: var(--primary);
      font-size: 1.1rem;
      font-family: 'Noto Serif SC', serif;
    }

    /* 标签页切换 (特色) */
    .nav-tabs-cute .nav-link {
      background: transparent;
      border: none;
      border-radius: var(--radius-pill);
      font-weight: 500;
      color: var(--text);
      padding: 10px 24px;
      margin-right: 8px;
      transition: 0.2s;
    }
    .nav-tabs-cute .nav-link.active {
      background: var(--primary);
      color: white;
      box-shadow: 0 8px 20px rgba(8, 145, 178, 0.2);
    }
    .tab-pane {
      padding-top: 30px;
    }

    /* 海报 hover 播放按钮 */
    .poster-hover {
      position: relative;
      border-radius: 18px;
      overflow: hidden;
      box-shadow: var(--light-shadow);
      background: #dffaff;
      aspect-ratio: 3/4;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: 0.3s;
      background-size: cover;
      background-position: center;
    }
    .poster-hover .play-btn {
      position: absolute;
      width: 64px;
      height: 64px;
      background: rgba(255, 255, 255, 0.85);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      opacity: 0;
      transform: scale(0.8);
      transition: 0.3s;
      color: var(--primary);
      font-size: 1.8rem;
      backdrop-filter: blur(4px);
    }
    .poster-hover:hover .play-btn {
      opacity: 1;
      transform: scale(1);
    }

    /* 回到顶部 */
    #toTop {
      position: fixed;
      bottom: 28px;
      right: 28px;
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: white;
      border: none;
      font-size: 1.2rem;
      opacity: 0;
      visibility: hidden;
      transition: 0.3s;
      z-index: 99;
      box-shadow: 0 4px 12px rgba(8, 145, 178, 0.4);
    }
    #toTop.show {
      opacity: 1;
      visibility: visible;
    }

    /* 友情链接区 */
    .friend-links {
      background: rgba(255, 255, 255, 0.4);
      padding: 28px 0;
      border-radius: 40px;
      text-align: center;
      margin: 30px auto 20px;
    }

    footer {
      background: #083344;
      color: #ecfeff;
      padding: 30px 0;
      margin-top: 40px;
    }
    footer a {
      color: #7dd3fc;
    }

    /* 按钮全圆 */
    .btn-pill {
      border-radius: var(--radius-pill);
      padding: 12px 28px;
      background: var(--primary);
      color: white;
      font-weight: 600;
      border: none;
      transition: 0.2s;
      box-shadow: 0 6px 14px rgba(8, 145, 178, 0.2);
    }
    .btn-pill:hover {
      background: var(--accent);
      transform: translateY(-2px);
    }

    /* 留白 */
    .space-y-5 { margin-bottom: 3rem; }

/* --- 子页面追加 --- */
.page-hero { padding: 120px 0 80px; background: linear-gradient(135deg, var(--bg) 0%, #d5f5f7 100%); }
.page-title { font-size: 2.8rem; font-weight: 800; color: var(--text); }
.page-subtitle { font-size: 1.2rem; color: var(--primary); margin-top: 12px; }
.section-tag { color: var(--accent); font-weight: 700; letter-spacing: 2px; text-transform: uppercase; font-size: .85rem; }
.section-heading { font-weight: 800; color: var(--text); font-size: 2rem; }
.content-card { background: var(--white); border-radius: var(--radius-card); padding: 32px; box-shadow: var(--light-shadow); height: 100%; transition: transform .3s; }
.content-card:hover { transform: translateY(-6px); }
.content-card i { color: var(--accent); font-size: 2rem; margin-bottom: 16px; }
.content-card h4 { color: var(--text); font-weight: 700; margin-bottom: 12px; }
.content-card p { color: var(--text); opacity: .8; line-height: 1.7; }
.timeline-about { position: relative; padding-left: 30px; }
.timeline-about::before { content: ''; position: absolute; left: 8px; top: 0; bottom: 0; width: 2px; background: var(--accent); opacity: .3; }
.timeline-about .tl-item { position: relative; margin-bottom: 32px; }
.timeline-about .tl-item::before { content: ''; position: absolute; left: -26px; top: 4px; width: 12px; height: 12px; border-radius: 50%; background: var(--accent); }
.timeline-about .tl-item h5 { color: var(--text); font-weight: 700; }
.timeline-about .tl-item span { color: var(--accent); font-size: .85rem; font-weight: 600; }
.timeline-about .tl-item p { color: var(--text); opacity: .8; margin-top: 6px; }
.faq-item { background: var(--white); border-radius: var(--radius-card); padding: 24px 28px; margin-bottom: 16px; box-shadow: var(--light-shadow); }
.faq-item h5 { color: var(--text); font-weight: 700; }
.faq-item p { color: var(--text); opacity: .8; margin-top: 8px; line-height: 1.6; }
.cta-section { background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%); border-radius: var(--radius-card); padding: 60px 40px; color: var(--white); text-align: center; }
.cta-section h2 { font-weight: 800; font-size: 2rem; }
.cta-section p { opacity: .95; margin: 16px 0 28px; font-size: 1.1rem; }
.cta-section .btn-pill { background: var(--white); color: var(--primary); border: none; padding: 12px 36px; font-weight: 700; font-size: 1.1rem; }
.cta-section .btn-pill:hover { background: var(--bg); }
.feature-icon { width: 64px; height: 64px; border-radius: 18px; background: var(--bg); display: flex; align-items: center; justify-content: center; margin-bottom: 20px; }
.feature-icon i { font-size: 1.6rem; color: var(--primary); }
.highlight-text { color: var(--accent); font-weight: 600; }
.page-title { font-size: 2rem; }
.section-heading { font-size: 1.5rem; }
.cta-section { padding: 40px 24px; }

/* --- 子页面追加 --- */
/* 隐私声明页面专属样式 */
        .privacy-hero {
            background: linear-gradient(135deg, var(--bg) 0%, rgba(14, 165, 233, 0.15) 100%);
            padding: 4rem 0 2rem;
            border-bottom: 1px solid rgba(8, 145, 178, 0.15);
        }
.privacy-container {
            max-width: 860px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
.privacy-section {
            background: var(--white);
            border-radius: var(--radius-card);
            padding: 2.5rem 2rem;
            margin-bottom: 1.5rem;
            box-shadow: var(--light-shadow);
            border: 1px solid rgba(8, 145, 178, 0.08);
        }
.privacy-section h2 {
            color: var(--primary);
            font-size: 1.35rem;
            font-weight: 700;
            margin-bottom: 1.2rem;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid var(--bg);
            position: relative;
        }
.privacy-section h2::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 60px;
            height: 2px;
            background: var(--accent);
        }
.privacy-section h3 {
            color: var(--text);
            font-size: 1.05rem;
            font-weight: 600;
            margin: 1.5rem 0 0.8rem;
        }
.privacy-section p {
            color: var(--text);
            line-height: 1.9;
            font-size: 0.95rem;
            margin-bottom: 1rem;
            opacity: 0.9;
        }
.privacy-section ul, .privacy-section ol {
            color: var(--text);
            line-height: 1.9;
            font-size: 0.95rem;
            padding-left: 1.5rem;
            margin-bottom: 1rem;
            opacity: 0.9;
        }
.privacy-section li {
            margin-bottom: 0.5rem;
        }
.privacy-updated {
            display: inline-block;
            background: var(--bg);
            color: var(--primary);
            padding: 0.3rem 1rem;
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 1.5rem;
        }
.privacy-contact-box {
            background: var(--bg);
            border-radius: var(--radius-card);
            padding: 1.5rem;
            margin-top: 1.5rem;
            border-left: 4px solid var(--accent);
        }
.privacy-contact-box p {
            margin-bottom: 0.5rem;
        }
.privacy-contact-box i {
            color: var(--accent);
            margin-right: 0.5rem;
        }
/* 覆盖Bootstrap卡片样式 */
        .privacy-section .card,
        .privacy-section .card-body {
            background: var(--white);
            color: var(--text);
            border-color: rgba(8, 145, 178, 0.1);
        }
.privacy-hero {
                padding: 2.5rem 0 1.5rem;
            }
.privacy-section {
                padding: 1.5rem 1.2rem;
            }
.privacy-section h2 {
                font-size: 1.2rem;
            }

/* --- 子页面追加 --- */
/* 确保 Bootstrap 组件不破坏站点配色 —— 这里主要使用栅格，自己写组件类 */
    .rank-table {
      width: 100%;
      border-collapse: collapse;
      background: var(--white);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--light-shadow);
    }
.rank-table th {
      background: var(--primary);
      color: var(--white);
      font-weight: 600;
      padding: 1rem 1.2rem;
      text-align: left;
      border: none;
    }
.rank-table td {
      padding: 1.2rem 1.2rem;
      border-bottom: 1px solid rgba(8, 145, 178, 0.1);
      color: var(--text);
      vertical-align: middle;
      background: var(--white);
    }
.rank-table tr:last-child td {
      border-bottom: none;
    }
.rank-badge {
      display: inline-block;
      background: var(--accent);
      color: var(--white);
      border-radius: var(--radius-pill);
      font-weight: 700;
      font-size: 0.9rem;
      min-width: 2.2rem;
      text-align: center;
      padding: 0.2rem 0.6rem;
    }
.rank-badge.top3 {
      background: var(--primary);
    }
.rank-title {
      font-weight: 600;
      color: var(--text);
    }
.rank-score {
      font-weight: 700;
      color: var(--primary);
    }
.rank-tag {
      background: rgba(14, 165, 233, 0.1);
      color: var(--primary);
      padding: 0.2rem 0.8rem;
      border-radius: var(--radius-pill);
      font-size: 0.75rem;
      font-weight: 500;
      display: inline-block;
      margin-right: 0.4rem;
    }
.trend-up {
      color: #10b981;
      font-weight: 600;
    }
.trend-down {
      color: #ef4444;
      font-weight: 600;
    }
.trend-same {
      color: #6b7280;
      font-weight: 600;
    }
.rank-note {
      background: rgba(8, 145, 178, 0.04);
      border-left: 4px solid var(--primary);
      padding: 1rem 1.5rem;
      border-radius: 0.5rem;
      color: var(--text);
    }
/* 卡片风格沿用 card-cute (已有) */
    .card-cute {
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--light-shadow);
      padding: 1.8rem;
      border: none;
    }
.list-unstyled li {
      padding: 0.3rem 0;
    }
/* 高亮当前导航 (ranking) */
    .navbar-nav .nav-link.active {
      color: var(--accent) !important;
      font-weight: 600;
    }