:root {
      --primary: #0891b2;
      --accent: #0ea5e9;
      --bg: #ecfeff;
      --ink: #083344;
      --border: #bae6fd;
    }
    body {
      background-color: var(--bg);
      color: var(--ink);
      font-family: 'Inter', sans-serif;
      line-height: 1.75;
      overflow-x: hidden;
    }
    h1, h2, h3, .navbar-brand {
      font-weight: 900;
      letter-spacing: -0.02em;
    }
    /* 等宽数字用于数据 */
    .stat-num {
      font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
      font-weight: 700;
      font-size: 2.6rem;
      color: var(--primary);
    }
    /* 极简无阴影，纯描边 */
    .card, .timeline-item, .feature-tab, .section-block {
      background: transparent;
      border: 1px solid var(--border);
      box-shadow: none !important;
      border-radius: 0 !important;
    }
    /* 波浪分割 */
    .wave-divider {
      height: 60px;
      background: linear-gradient(135deg, var(--bg) 25%, transparent 25%) -20px 0, linear-gradient(225deg, var(--bg) 25%, transparent 25%) -20px 0;
      background-size: 40px 40px;
      border-top: 1px solid var(--border);
      margin-top: -1px;
    }
    .navbar {
      background: rgba(236, 254, 255, 0.8);
      backdrop-filter: blur(12px);
      transition: background 0.3s ease, box-shadow 0.2s;
      border-bottom: 1px solid var(--border);
    }
    .navbar.scrolled {
      background: rgba(236, 254, 255, 0.95);
      box-shadow: 0 2px 10px rgba(8,145,178,0.05);
    }
    .navbar-brand {
      font-size: 1.8rem;
      color: var(--ink) !important;
    }
    .navbar .nav-link {
      color: var(--ink);
      font-weight: 500;
      margin-right: 1rem;
    }
    .navbar .nav-link:hover {
      color: var(--primary);
    }
    .btn-outline-primary {
      border-radius: 0;
      border-width: 2px;
      color: var(--primary);
      border-color: var(--primary);
    }
    .btn-outline-primary:hover {
      background: var(--primary);
      color: white;
    }
    .btn-primary {
      background: var(--primary);
      border-radius: 0;
      border: 2px solid var(--primary);
      font-weight: 600;
    }
    .btn-primary:hover {
      background: var(--accent);
      border-color: var(--accent);
    }
    /* 时间线 */
    .timeline {
      position: relative;
      padding-left: 2rem;
    }
    .timeline::before {
      content: "";
      position: absolute;
      left: 8px;
      top: 0;
      bottom: 0;
      width: 2px;
      background: var(--border);
    }
    .timeline-item {
      position: relative;
      padding: 1.5rem 1.5rem 1.5rem 2rem;
      margin-bottom: 2rem;
      border: 1px solid var(--border);
      background: rgba(255,255,255,0.3);
    }
    .timeline-item::before {
      content: "";
      position: absolute;
      left: -1.4rem;
      top: 2rem;
      width: 16px;
      height: 16px;
      background: var(--bg);
      border: 3px solid var(--primary);
      border-radius: 50%;
    }
    /* 标签页 */
    .nav-tabs .nav-link {
      border-radius: 0;
      border: 1px solid var(--border);
      background: transparent;
      color: var(--ink);
      font-weight: 600;
    }
    .nav-tabs .nav-link.active {
      background: var(--primary);
      color: white;
      border-color: var(--primary);
    }
    .tab-content .card {
      border: none;
      border-top: 1px solid var(--border);
    }
    /* 卡片hover */
    .hover-card {
      transition: transform 0.25s ease, border-color 0.2s;
      border: 1px solid var(--border);
    }
    .hover-card:hover {
      transform: scale(1.02);
      border-color: var(--accent);
    }
    /* 滚动淡入 */
    .fade-up {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.6s cubic-bezier(0.2, 0, 0, 1), transform 0.5s;
    }
    .fade-up.reveal {
      opacity: 1;
      transform: translateY(0);
    }
    /* 页脚友链 */
    .friend-links {
      border-top: 1px solid var(--border);
      background: rgba(255,255,255,0.2);
    }
    footer {
      border-top: 1px solid var(--border);
      background: var(--bg);
    }
    /* 斜切装饰 */
    .skew-bg {
      position: relative;
    }
    .skew-bg::after {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(160deg, transparent 70%, var(--bg) 70%);
      pointer-events: none;
      z-index: -1;
    }
    .section-padding {
      padding: 4rem 0;
    }
    /* 导航栏图标 */
    .navbar-brand i {
      margin-right: 6px;
      color: var(--accent);
    }
    /* 首页首屏 */
    .hero-title {
      font-size: clamp(2.6rem, 6vw, 4.2rem);
      font-weight: 900;
      line-height: 1.1;
    }
    .hero-sub {
      font-size: 1.2rem;
      opacity: 0.85;
    }

/* --- 子页面追加 --- */
/* 本页专属微调：让关于页的内容呼吸感更强，同时保持站点风格 */
    .about-hero { padding: 5rem 0 3rem; }
.about-hero h1 { font-size: 2.6rem; font-weight: 800; color: var(--ink); }
.about-hero .hero-sub { font-size: 1.1rem; color: var(--ink); opacity: 0.85; max-width: 720px; margin: 1rem auto 0; }
.section-tag { display: inline-block; background: var(--primary); color: #fff; font-size: 0.8rem; font-weight: 700; letter-spacing: 1px; padding: 0.25rem 0.9rem; border-radius: 30px; text-transform: uppercase; margin-bottom: 1rem; }
.about-section { background: rgba(255,255,255,0.6); border: 1px solid var(--border); border-radius: 20px; padding: 2.5rem 2rem; margin-bottom: 2.5rem; backdrop-filter: blur(4px); }
.about-section h2 { font-weight: 800; color: var(--ink); margin-bottom: 1.2rem; font-size: 1.8rem; }
.about-section p { color: var(--ink); opacity: 0.85; line-height: 1.85; margin-bottom: 1rem; }
.about-section .lead { font-size: 1.05rem; }
.value-item { background: var(--bg); border: 1px solid var(--border); border-radius: 16px; padding: 1.5rem; height: 100%; transition: transform 0.2s ease; }
.value-item:hover { transform: translateY(-4px); }
.value-item i { font-size: 2rem; color: var(--primary); margin-bottom: 0.8rem; }
.value-item h3 { font-size: 1.15rem; font-weight: 700; color: var(--ink); margin-bottom: 0.5rem; }
.value-item p { font-size: 0.92rem; margin: 0; }
.stat-wrap { display: flex; flex-wrap: wrap; gap: 2rem; justify-content: center; margin: 2rem 0; }
.stat-num .num { font-size: 2.2rem; font-weight: 800; color: var(--primary); }
.stat-num .label { font-size: 0.85rem; color: var(--ink); opacity: 0.7; }
.timeline-item .year { font-weight: 800; color: var(--primary); font-size: 1.1rem; }
.timeline-item p { margin-bottom: 0.3rem; }
.friend-links a { color: var(--ink); opacity: 0.7; text-decoration: none; font-size: 0.9rem; border-bottom: 1px dashed var(--border); }
.friend-links a:hover { opacity: 1; color: var(--primary); }

/* --- 子页面追加 --- */
/* 本页专属样式 */
    .privacy-hero {
      background: linear-gradient(135deg, var(--bg) 0%, #d0f1ff 100%);
      padding: 4rem 0 3rem;
      border-bottom: 1px solid var(--border);
    }
.privacy-card {
      background: rgba(255,255,255,.75);
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 2rem;
      margin-bottom: 1.5rem;
      transition: box-shadow .3s ease;
    }
.privacy-card:hover {
      box-shadow: 0 8px 30px rgba(8, 145, 178, .1);
    }
.privacy-card h2 {
      color: var(--primary);
      font-weight: 700;
      font-size: 1.4rem;
      margin-bottom: 1rem;
      display: flex;
      align-items: center;
      gap: .6rem;
    }
.privacy-card h2 i {
      font-size: 1.2rem;
      color: var(--accent);
    }
.privacy-card p, .privacy-card li {
      color: var(--ink);
      line-height: 1.8;
      font-size: .95rem;
    }
.privacy-card ul {
      padding-left: 1.2rem;
      margin-bottom: 0;
    }
.privacy-card li {
      margin-bottom: .5rem;
    }
.privacy-toc {
      background: rgba(8, 145, 178, .06);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 1.5rem 2rem;
      margin-bottom: 2.5rem;
    }
.privacy-toc h3 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: .8rem;
    }
.privacy-toc a {
      color: var(--ink);
      text-decoration: none;
      font-size: .92rem;
      display: inline-block;
      margin: .2rem .8rem .2rem 0;
      transition: color .2s;
    }
.privacy-toc a:hover {
      color: var(--primary);
    }
.update-date {
      color: var(--primary);
      font-weight: 600;
      font-size: .9rem;
      margin-top: 2rem;
      padding-top: 1rem;
      border-top: 1px solid var(--border);
    }
.privacy-card {
        padding: 1.5rem;
      }

/* --- 子页面追加 --- */
/* 条款页专属的小范围样式，自动合并进站点CSS */
        .terms-hero {
            background: linear-gradient(135deg, rgba(8,145,178,.08) 0%, rgba(14,165,233,.12) 100%);
            border-bottom: 1px solid var(--border);
            padding: 80px 0 48px;
            position: relative;
            overflow: hidden;
        }
.terms-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(8,145,178,.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
.terms-hero h1 {
            font-size: 2.6rem;
            font-weight: 900;
            letter-spacing: -0.02em;
            color: var(--ink);
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }
.terms-hero .hero-sub {
            font-size: 1.1rem;
            color: rgba(8,51,68,.75);
            max-width: 680px;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }
.terms-section {
            padding: 48px 0;
            border-bottom: 1px dashed rgba(8,145,178,.25);
        }
.terms-section:last-of-type {
            border-bottom: none;
        }
.terms-section h2 {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
.terms-section h2 i {
            font-size: 1.2rem;
            opacity: .8;
        }
.terms-section h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--ink);
            margin: 20px 0 10px;
        }
.terms-section p {
            color: rgba(8,51,68,.85);
            line-height: 1.8;
            margin-bottom: 14px;
            font-size: .98rem;
        }
.terms-section ul {
            padding-left: 20px;
            margin-bottom: 14px;
        }
.terms-section li {
            color: rgba(8,51,68,.85);
            line-height: 1.8;
            font-size: .96rem;
            margin-bottom: 6px;
        }
.terms-section .highlight-box {
            background: rgba(8,145,178,.06);
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            margin: 20px 0;
        }
.terms-section .highlight-box p {
            margin-bottom: 0;
            font-size: .95rem;
        }
.terms-toc {
            background: rgba(8,145,178,.05);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 28px 32px;
            margin: 40px 0 0;
        }
.terms-toc h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 16px;
        }
.terms-toc ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 8px 24px;
        }
.terms-toc li a {
            color: var(--primary);
            text-decoration: none;
            font-size: .92rem;
            font-weight: 500;
            transition: color .2s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
.terms-toc li a:hover {
            color: var(--accent);
            text-decoration: underline;
        }
.last-updated {
            display: inline-block;
            background: rgba(8,145,178,.1);
            color: var(--primary);
            font-size: .8rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            margin-top: 12px;
        }
.terms-hero h1 {
                font-size: 2rem;
            }
.terms-hero {
                padding: 56px 0 36px;
            }
.terms-toc {
                padding: 20px;
            }