:root {
      --primary: #0891b2;
      --accent: #0ea5e9;
      --bg: #ecfeff;
      --text: #083344;
      --border: #a5d8e0;
      --card-bg: rgba(255, 255, 255, 0.6);
      --mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', monospace;
    }

    * { box-sizing: border-box; }
    body {
      background-color: var(--bg);
      color: var(--text);
      font-family: 'Inter', system-ui, -apple-system, sans-serif;
      font-weight: 400;
      line-height: 1.7;
      letter-spacing: 0.01em;
      margin: 0;
      padding: 0;
    }

    /* 极简无阴影 · 纯描边 · 留白 */
    .bento-border {
      border: 1.5px solid var(--border);
      background: var(--card-bg);
      backdrop-filter: blur(1px);
      border-radius: 0;  /* 硬边 + 直角，强调描边 */
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s;
    }
    .bento-border:hover {
      transform: translateY(-6px);
      box-shadow: 0 12px 24px -12px rgba(8, 145, 178, 0.25);
      background: rgba(255, 255, 255, 0.85);
    }

    /* 点阵背景 (全局装饰) */
    .dot-matrix {
      background-image: radial-gradient(var(--border) 1px, transparent 1px);
      background-size: 24px 24px;
    }

    /* 细网格线背景用于hero及局部 */
    .grid-lines {
      background-image: 
        linear-gradient(to right, rgba(8, 145, 178, 0.08) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(8, 145, 178, 0.08) 1px, transparent 1px);
      background-size: 40px 40px;
    }

    /* 导航 */
    .navbar-zy {
      background: rgba(236, 254, 255, 0.85);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border);
      padding: 0.9rem 1.5rem;
      font-weight: 600;
    }
    .navbar-brand {
      font-weight: 900;
      font-size: 1.6rem;
      letter-spacing: -0.02em;
      color: var(--text) !important;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .navbar-brand i {
      color: var(--primary);
      font-size: 1.8rem;
    }
    .nav-link-custom {
      color: var(--text) !important;
      margin: 0 0.8rem;
      font-weight: 500;
      border-bottom: 2px solid transparent;
      transition: 0.2s;
    }
    .nav-link-custom:hover {
      border-bottom-color: var(--accent);
      color: var(--primary) !important;
    }

    /* hero 标签云 */
    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.8rem 1.4rem;
      justify-content: center;
      padding: 1rem 0 0.6rem;
    }
    .hero-tags span {
      font-family: var(--mono);
      font-size: 0.9rem;
      padding: 0.3rem 0.9rem;
      border: 1.5px solid var(--border);
      background: transparent;
      color: var(--text);
      letter-spacing: 0.02em;
      transition: 0.15s;
    }
    .hero-tags span:hover {
      background: var(--primary);
      color: white;
      border-color: var(--primary);
    }

    /* 标题排版 */
    .display-section-title {
      font-weight: 900;
      letter-spacing: -0.02em;
      color: var(--text);
      border-left: 6px solid var(--accent);
      padding-left: 1.2rem;
      margin: 2rem 0 1.5rem;
    }

    h1, h2, h3 { font-weight: 800; letter-spacing: -0.02em; }
    .lead-muted { color: #0f4e5c; }

    /* 等宽数据 */
    .mono-data {
      font-family: var(--mono);
      font-size: 0.9em;
      background: rgba(14, 165, 233, 0.08);
      padding: 0.2em 0.4em;
      border: 1px dashed var(--primary);
    }

    /* Bento 网格基础 */
    .bento-grid {
      display: grid;
      grid-template-columns: repeat(12, 1fr);
      gap: 1.2rem;
    }
    .bento-item { padding: 1.5rem; }

    /* 对比表格风格 */
    .compare-table {
      width: 100%;
      border-collapse: collapse;
    }
    .compare-table th, .compare-table td {
      border: 1px solid var(--border);
      padding: 0.75rem 1rem;
      background: rgba(255,255,255,0.4);
    }
    .compare-table th {
      background: rgba(14, 165, 233, 0.1);
      font-weight: 700;
    }

    /* 编号清单 */
    .numbered-list {
      list-style: none;
      counter-reset: step;
      padding-left: 0;
    }
    .numbered-list li {
      counter-increment: step;
      margin-bottom: 1.1rem;
      padding-left: 2.8rem;
      position: relative;
      font-weight: 450;
    }
    .numbered-list li::before {
      content: counter(step, decimal-leading-zero);
      position: absolute;
      left: 0;
      top: 0.1rem;
      font-family: var(--mono);
      font-weight: 600;
      color: var(--primary);
      font-size: 1.2rem;
      border-right: 2px solid var(--accent);
      padding-right: 0.6rem;
      line-height: 1;
    }

    /* hero 视差效果 (纯JS驱动) */
    .parallax-hero {
      position: relative;
      background-attachment: fixed;
      background-position: center;
      background-repeat: no-repeat;
      background-size: cover;
    }

    /* 错落卡片渐显动效 */
    .reveal-item {
      opacity: 0;
      transform: translateY(28px);
      transition: opacity 0.5s cubic-bezier(.2,.7,.3,1), transform 0.5s cubic-bezier(.2,.7,.3,1);
    }
    .reveal-item.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* footer 与友链 */
    .footer-zone {
      border-top: 1px solid var(--border);
      background: rgba(236, 254, 255, 0.7);
      padding: 2.5rem 0 1rem;
    }
    .friend-links {
      border: 1.5px dashed var(--primary);
      padding: 1.2rem 1.8rem;
      background: rgba(255,255,255,0.45);
    }

    /* 移动端折叠导航 */
    .navbar-toggler { border: 1px solid var(--border); }
    .navbar-toggler:focus { box-shadow: 0 0 0 2px var(--accent); }

    @media (max-width: 768px) {
      .bento-grid { grid-template-columns: repeat(6, 1fr); }
      .brand-lg { font-size: 1.2rem; }
    }

/* --- 子页面追加 --- */
/* 本页专属补充样式(极少量) */
    .about-hero { position: relative; overflow: hidden; }
.about-hero .about-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(8,145,178,.15) 0%, rgba(14,165,233,.08) 100%); }
.about-section-title { font-size: 1.75rem; font-weight: 800; color: var(--text); margin-bottom: 1.25rem; position: relative; display: inline-block; }
.about-section-title::after { content: ''; position: absolute; bottom: -6px; left: 0; width: 48px; height: 3px; background: var(--primary); border-radius: 2px; }
.about-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 16px; padding: 1.75rem; height: 100%; transition: transform .3s ease, box-shadow .3s ease; }
.about-card:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(8,145,178,.12); }
.about-icon { font-size: 2rem; color: var(--primary); margin-bottom: 1rem; }
.about-stat { font-family: var(--mono); font-size: 2.25rem; font-weight: 700; color: var(--primary); line-height: 1.2; }
.about-stat-label { font-size: .9rem; color: var(--text); opacity: .75; letter-spacing: .03em; }
.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; margin-bottom: 2rem; }
.timeline-item::before { content: ''; position: absolute; left: -2rem; top: 6px; width: 16px; height: 16px; border-radius: 50%; background: var(--primary); border: 3px solid var(--bg); }
.timeline-year { font-family: var(--mono); font-size: 1.1rem; font-weight: 700; color: var(--primary); }
.nav-link-custom.active { color: var(--primary) !important; font-weight: 700; }

/* --- 子页面追加 --- */
.join-hero {
            background: linear-gradient(135deg, var(--bg) 0%, #e0f2fe 100%);
            border-bottom: 1px solid var(--border);
            padding: 5rem 0 3rem;
            position: relative;
            overflow: hidden;
        }
.join-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(14, 165, 233, 0.15) 0%, transparent 70%);
        }
.join-hero .container {
            position: relative;
            z-index: 2;
        }
.join-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: white;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            letter-spacing: 0.5px;
        }
.join-stats {
            display: flex;
            gap: 2.5rem;
            margin-top: 3rem;
            flex-wrap: wrap;
        }
.join-stat-item {
            text-align: center;
        }
.join-stat-item .stat-number {
            font-family: var(--mono);
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
        }
.join-stat-item .stat-label {
            font-size: 0.85rem;
            color: var(--text);
            opacity: 0.7;
            margin-top: 4px;
        }
.role-cards {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
            margin-top: 2rem;
        }
.role-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 1.8rem 1.5rem;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
.role-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(8, 145, 178, 0.12);
        }
.role-card .role-icon {
            font-size: 2rem;
            margin-bottom: 1rem;
            color: var(--primary);
        }
.role-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.6rem;
        }
.role-card p {
            font-size: 0.9rem;
            color: var(--text);
            opacity: 0.8;
            line-height: 1.7;
            margin-bottom: 0;
        }
.benefit-list {
            list-style: none;
            padding: 0;
            margin: 1.5rem 0 0;
        }
.benefit-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 10px 0;
            border-bottom: 1px dashed var(--border);
            font-size: 0.95rem;
            color: var(--text);
        }
.benefit-list li:last-child {
            border-bottom: none;
        }
.benefit-list li i {
            color: var(--primary);
            margin-top: 4px;
            font-size: 0.9rem;
        }
.step-flow {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
            position: relative;
        }
.step-item {
            text-align: center;
            padding: 1.5rem 1rem;
            position: relative;
        }
.step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: white;
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            font-family: var(--mono);
            box-shadow: 0 4px 12px rgba(8, 145, 178, 0.3);
        }
.step-item h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.5rem;
        }
.step-item p {
            font-size: 0.85rem;
            color: var(--text);
            opacity: 0.75;
            line-height: 1.6;
            margin: 0;
        }
.step-item:not(:last-child)::after {
            content: '→';
            position: absolute;
            top: 40px;
            right: -20px;
            font-size: 1.5rem;
            color: var(--primary);
            opacity: 0.5;
            font-weight: 700;
        }
.join-cta-box {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            border-radius: 20px;
            padding: 3rem 2rem;
            text-align: center;
            color: white;
            margin: 3rem 0;
        }
.join-cta-box h3 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
.join-cta-box p {
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto 2rem;
            font-size: 1.05rem;
            line-height: 1.8;
        }
.btn-join-main {
            background: white;
            color: var(--primary);
            border: none;
            padding: 12px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }
.btn-join-main:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
            color: var(--primary);
        }
.platform-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            margin: 1.5rem 0;
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border);
        }
.platform-table th {
            background: rgba(8, 145, 178, 0.1);
            color: var(--text);
            font-weight: 700;
            padding: 14px 16px;
            text-align: left;
            font-size: 0.9rem;
        }
.platform-table td {
            padding: 12px 16px;
            border-top: 1px solid var(--border);
            font-size: 0.9rem;
            color: var(--text);
            background: var(--card-bg);
        }
.platform-table tr:hover td {
            background: rgba(14, 165, 233, 0.05);
        }
.faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 1.5rem;
            margin-bottom: 1rem;
        }
.faq-item h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
.faq-item h4 i {
            color: var(--primary);
            font-size: 0.9rem;
        }
.faq-item p {
            font-size: 0.9rem;
            color: var(--text);
            opacity: 0.8;
            line-height: 1.7;
            margin: 0;
            padding-left: 24px;
        }
.join-hero {
                padding: 3.5rem 0 2rem;
            }
.join-stats {
                gap: 1.5rem;
            }
.step-item:not(:last-child)::after {
                display: none;
            }
.join-cta-box {
                padding: 2rem 1.5rem;
            }
.platform-table {
                font-size: 0.8rem;
            }
.platform-table th, .platform-table td {
                padding: 10px 12px;
            }

/* --- 子页面追加 --- */
/* 本页专属补充样式 */
        .legal-hero {
            padding: 120px 0 60px;
            background: linear-gradient(135deg, rgba(8,145,178,0.05) 0%, rgba(14,165,233,0.08) 100%);
            border-bottom: 1px solid var(--border);
        }
.legal-container {
            max-width: 960px;
            margin: 0 auto;
            padding: 0 20px;
        }
.legal-section {
            background: var(--card-bg);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 40px 50px;
            margin-bottom: 30px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
.legal-section:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(8, 145, 178, 0.1);
        }
.legal-section h2 {
            color: var(--primary);
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 12px;
        }
.legal-section h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }
.legal-section p, .legal-section li {
            color: var(--text);
            line-height: 1.8;
            font-size: 0.98rem;
        }
.legal-section ul {
            padding-left: 20px;
            margin: 15px 0;
        }
.legal-section li {
            margin-bottom: 10px;
            padding-left: 8px;
        }
.legal-section li::marker {
            color: var(--accent);
        }
.legal-note {
            background: rgba(8, 145, 178, 0.06);
            border-left: 4px solid var(--accent);
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            margin: 20px 0;
            font-style: italic;
        }
.legal-date {
            display: inline-block;
            padding: 6px 16px;
            background: var(--primary);
            color: #fff;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 25px;
        }
.legal-hero { padding: 100px 0 40px; }
.legal-section { padding: 25px 20px; }
.legal-section h2 { font-size: 1.3rem; }

/* --- 子页面追加 --- */
/* 隐私政策页专属样式 */
        .privacy-hero {
            padding: 4rem 0 2.5rem;
        }
.privacy-content-section {
            padding: 1.5rem 0;
        }
.privacy-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 1.5rem;
            padding: 2rem;
            margin-bottom: 1.5rem;
            backdrop-filter: blur(8px);
            transition: all .3s ease;
        }
.privacy-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(8,145,178,.1);
        }
.privacy-card h3 {
            color: var(--primary);
            font-weight: 700;
            margin-bottom: 1rem;
            font-size: 1.25rem;
        }
.privacy-card p {
            color: var(--text);
            line-height: 1.8;
            margin-bottom: 1rem;
        }
.privacy-card ul {
            padding-left: 1.25rem;
            color: var(--text);
            line-height: 1.9;
        }
.privacy-card ul li {
            margin-bottom: .4rem;
        }
.privacy-badge {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            background: rgba(8,145,178,.12);
            color: var(--primary);
            border: 1px solid rgba(8,145,178,.25);
            padding: .3rem .9rem;
            border-radius: 999px;
            font-size: .82rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
        }
.privacy-meta {
            font-family: var(--mono);
            font-size: .85rem;
            color: var(--primary);
            background: rgba(8,145,178,.08);
            border-radius: .75rem;
            padding: 1rem 1.25rem;
            border-left: 3px solid var(--primary);
            margin-bottom: 2rem;
        }
.privacy-toc {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 1.25rem;
            padding: 1.5rem 2rem;
            margin-bottom: 2rem;
            backdrop-filter: blur(6px);
        }
.privacy-toc a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
            transition: all .2s;
            display: inline-block;
            padding: .25rem .5rem;
            border-radius: .5rem;
        }
.privacy-toc a:hover {
            background: rgba(8,145,178,.1);
            color: var(--text);
        }
.privacy-toc li {
            margin-bottom: .3rem;
        }
.last-updated {
            font-family: var(--mono);
            font-size: .85rem;
            color: var(--primary);
            opacity: .8;
            display: flex;
            align-items: center;
            gap: .5rem;
            margin-top: .5rem;
        }
.privacy-card {
                padding: 1.25rem;
            }
.privacy-hero {
                padding-top: 2.5rem;
            }

/* --- 子页面追加 --- */
/* 本页专属补充样式 */
        .guideline-hero {
            position: relative;
            background: linear-gradient(135deg, rgba(8,145,178,0.08) 0%, rgba(14,165,233,0.04) 100%);
            border-bottom: 1px solid var(--border);
        }
.step-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 1.5rem;
            height: 100%;
            transition: transform .25s ease, box-shadow .25s ease;
        }
.step-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(8,145,178,0.12);
        }
.step-num {
            font-family: var(--mono);
            font-size: .85rem;
            color: var(--accent);
            letter-spacing: .08em;
            font-weight: 600;
        }
.format-table {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
        }
.format-table table {
            margin-bottom: 0;
        }
.format-table th {
            background: rgba(8,145,178,0.08);
            color: var(--text);
            font-weight: 600;
            border-bottom: 2px solid var(--border);
            padding: 1rem 1.25rem;
            font-size: .9rem;
            letter-spacing: .03em;
        }
.format-table td {
            padding: 1rem 1.25rem;
            border-bottom: 1px solid rgba(165,216,224,0.4);
            color: var(--text);
            font-size: .925rem;
            background: transparent;
        }
.format-table tr:last-child td { border-bottom: none; }
.format-table td:first-child {
            font-family: var(--mono);
            font-weight: 500;
            color: var(--primary);
            white-space: nowrap;
        }
.notice-box {
            background: rgba(8,145,178,0.06);
            border-left: 4px solid var(--accent);
            border-radius: 0 8px 8px 0;
            padding: 1.25rem 1.5rem;
            margin: 1.5rem 0;
        }
.notice-box p { margin-bottom: 0; color: var(--text); font-size: .95rem; }
.checklist-item {
            display: flex;
            gap: .75rem;
            align-items: flex-start;
            padding: .5rem 0;
            color: var(--text);
            font-size: .95rem;
        }
.checklist-item i {
            color: var(--primary);
            margin-top: .25rem;
            font-size: .9rem;
        }
.mono-tag {
            font-family: var(--mono);
            font-size: .85rem;
            background: rgba(8,145,178,0.1);
            color: var(--primary);
            padding: .2rem .6rem;
            border-radius: 4px;
            display: inline-block;
            margin-right: .4rem;
        }
.format-table { overflow-x: auto; }
.format-table table { min-width: 560px; }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.table { color:#083344 !important; border-color:rgba(0,0,0,.12) !important; --bs-table-bg:transparent !important; --bs-table-color:#083344 !important; }