/* ============================================================
   知空 · 法律文档排版样式（隐私政策 / 服务条款 共用）
   与主站风格保持一致：浅色渐变背景 + 玻璃质感 + 品牌紫
   ============================================================ */

:root {
    --bg: #f7f9fc;
    --surface: #ffffff;
    --surface-2: #f1f5f9;
    --text-1: #0f172a;
    --text-2: #475569;
    --text-3: #94a3b8;
    --border: #e2e8f0;
    --brand: #6366f1;
    --brand-2: #8b5cf6;
    --brand-grad: linear-gradient(135deg, #6366f1, #8b5cf6);
    --danger: #ef4444;
    --radius: 14px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--font);
    background: linear-gradient(170deg, #fbfcff 0%, #f1f4ff 38%, #f6f2ff 68%, #fdfbff 100%);
    background-attachment: fixed;
    color: var(--text-1);
    line-height: 1.75;
    letter-spacing: -0.005em;
    -webkit-font-smoothing: antialiased;
}

img { display: block; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- 顶栏 ---------- */
.legal-nav {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px clamp(16px, 4vw, 40px);
    background: rgba(255, 255, 255, 0.78);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(226, 232, 240, 0.9);
}
.legal-nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 15px;
    color: var(--text-1);
}
.legal-nav-brand img { width: 30px; height: 30px; border-radius: 8px; object-fit: contain; }
.legal-nav-links { display: flex; align-items: center; gap: 8px; }
.legal-nav-links a {
    padding: 7px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-2);
    border: 1px solid transparent;
}
.legal-nav-links a:hover { background: var(--surface-2); text-decoration: none; }
.legal-nav-links a.active {
    color: #fff;
    background: var(--brand-grad);
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.28);
}

/* ---------- 主体 ---------- */
.legal-wrap {
    max-width: 860px;
    margin: 0 auto;
    padding: clamp(28px, 5vw, 56px) clamp(16px, 4vw, 32px) 80px;
}

.legal-hero { margin-bottom: 28px; }
.legal-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 13px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    color: var(--brand);
    background: rgba(99, 102, 241, 0.10);
    margin-bottom: 14px;
}
.legal-hero h1 {
    margin: 0 0 12px;
    font-size: clamp(26px, 4.4vw, 38px);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
}
.legal-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 20px;
    font-size: 13px;
    color: var(--text-3);
}

/* 提示框 */
.legal-notice {
    margin: 22px 0 30px;
    padding: 16px 20px;
    border-radius: var(--radius);
    background: rgba(99, 102, 241, 0.07);
    border: 1px solid rgba(99, 102, 241, 0.18);
    border-left: 4px solid var(--brand);
    font-size: 14.5px;
    color: var(--text-2);
}
.legal-notice strong { color: var(--text-1); }

/* 摘要卡 */
.legal-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin: 26px 0 34px;
}
.legal-summary-item {
    padding: 16px 18px;
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(226, 232, 240, 0.95);
    box-shadow: 0 4px 18px rgba(99, 102, 241, 0.06);
}
.legal-summary-item .k {
    font-size: 12px;
    font-weight: 700;
    color: var(--brand);
    letter-spacing: 0.02em;
    margin-bottom: 6px;
}
.legal-summary-item .v { font-size: 13.5px; color: var(--text-2); line-height: 1.65; }

/* 目录 */
.legal-toc {
    margin: 0 0 36px;
    padding: 20px 24px;
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.66);
    border: 1px solid rgba(226, 232, 240, 0.95);
}
.legal-toc h2 {
    margin: 0 0 12px;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-2);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
.legal-toc ol {
    margin: 0;
    padding-left: 20px;
    columns: 2;
    column-gap: 28px;
}
.legal-toc li { font-size: 13.5px; margin-bottom: 5px; break-inside: avoid; }

/* 正文 */
.legal-body { font-size: 15px; color: var(--text-2); }
.legal-body section { margin-bottom: 34px; scroll-margin-top: 80px; }
.legal-body h2 {
    margin: 0 0 14px;
    font-size: 19px;
    font-weight: 700;
    color: var(--text-1);
    letter-spacing: -0.02em;
    padding-bottom: 9px;
    border-bottom: 1px solid var(--border);
}
.legal-body h3 {
    margin: 20px 0 10px;
    font-size: 15.5px;
    font-weight: 700;
    color: var(--text-1);
}
.legal-body p { margin: 0 0 12px; }
.legal-body ul, .legal-body ol { margin: 0 0 14px; padding-left: 22px; }
.legal-body li { margin-bottom: 7px; }
.legal-body strong { color: var(--text-1); font-weight: 700; }

/* 条款编号（一、二、三 用中文数字，保持一致缩进） */
.legal-body .clause { margin-bottom: 10px; padding-left: 2px; }
.legal-body .clause .no { color: var(--text-1); font-weight: 700; margin-right: 4px; }

/* 重点条款高亮 */
.legal-body .key-clause {
    padding: 16px 20px;
    border-radius: var(--radius);
    background: rgba(239, 68, 68, 0.055);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-left: 4px solid var(--danger);
    margin: 14px 0;
}
.legal-body .key-clause p:last-child { margin-bottom: 0; }

/* 强调背书的承诺块 */
.legal-body .promise {
    padding: 16px 20px;
    border-radius: var(--radius);
    background: rgba(16, 185, 129, 0.07);
    border: 1px solid rgba(16, 185, 129, 0.22);
    border-left: 4px solid #10b981;
    margin: 14px 0;
}
.legal-body .promise p:last-child { margin-bottom: 0; }

/* 表格 */
.legal-table {
    width: 100%;
    border-collapse: collapse;
    margin: 14px 0 18px;
    font-size: 13.5px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 10px;
    overflow: hidden;
}
.legal-table th, .legal-table td {
    padding: 11px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.legal-table th {
    background: var(--surface-2);
    font-weight: 700;
    color: var(--text-1);
    font-size: 13px;
}
.legal-table tr:last-child td { border-bottom: none; }

/* 联系方式块 */
.legal-contact {
    padding: 20px 22px;
    border-radius: var(--radius);
    background: var(--surface-2);
    border: 1px solid var(--border);
}
.legal-contact div { font-size: 14px; margin-bottom: 6px; }
.legal-contact div:last-child { margin-bottom: 0; }
.legal-contact span { color: var(--text-3); display: inline-block; min-width: 96px; }

/* 页脚 */
.legal-footer {
    border-top: 1px solid var(--border);
    padding: 26px clamp(16px, 4vw, 40px);
    text-align: center;
    font-size: 13px;
    color: var(--text-3);
}
.legal-footer-links { margin-top: 10px; display: flex; justify-content: center; gap: 18px; flex-wrap: wrap; }
.legal-footer-links a { color: var(--text-2); font-weight: 600; }

/* 回到顶部 */
.legal-top {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-2);
    padding: 8px 14px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.7);
    cursor: pointer;
}
.legal-top:hover { background: var(--surface-2); text-decoration: none; }

/* 移动端 */
@media (max-width: 640px) {
    .legal-toc ol { columns: 1; }
    .legal-body { font-size: 14.5px; }
    .legal-nav { padding: 10px 14px; }
    .legal-nav-brand span { display: none; }
    .legal-nav-links a { padding: 6px 11px; font-size: 12px; }
    .legal-summary { grid-template-columns: 1fr; }
}

@media print {
    .legal-nav, .legal-top, .legal-footer-links { display: none; }
    body { background: #fff; }
}