/* --------------------------------------------------------------------------
   Legal pages — Privacy Policy / Terms of Service
   编辑式排版：编号章节 + 细分割线，不用卡片、不用渐变。
   与 demo.css 共用同一套设计令牌（暖纸色 / 墨色 / 蓝）。
   -------------------------------------------------------------------------- */
:root {
  --paper: #f6f5f1;
  --surface: #ffffff;
  --surface-2: #fbfaf6;
  --ink: #1b1b19;
  --ink-2: #5e5e57;
  --ink-3: #6f6e66;
  --line: #e2e0d8;
  --line-strong: #cbc9be;
  --accent: #0b57d0;
  --serif: Georgia, "Iowan Old Style", "Noto Serif SC", "Songti SC", serif;
  --sans: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #161614;
    --surface: #1e1e1b;
    --surface-2: #242421;
    --ink: #f2f0e9;
    --ink-2: #c3c1b8;
    --ink-3: #a09e95;
    --line: #34342f;
    --line-strong: #4b4b44;
    --accent: #8ab4f8;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}
[hidden] { display: none !important; }
a { color: var(--accent); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
[lang="zh-CN"] { font-family: var(--sans); line-height: 1.85; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 20;
  padding: 10px 16px; background: var(--surface); color: var(--ink);
  border: 1px solid var(--line-strong);
}
.skip-link:focus { left: 16px; top: 16px; }

/* 顶栏 ------------------------------------------------------------------ */
.legal-topbar {
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
  max-width: 1180px; margin: 0 auto;
  padding: 22px 28px 20px;
  border-bottom: 1px solid var(--line);
}
.legal-topbar__brand { display: flex; align-items: center; gap: 11px; margin-right: auto; }
.legal-topbar__brand img { width: 34px; height: 34px; display: block; }
.legal-topbar__name {
  font-family: var(--mono); font-size: 12px; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; color: var(--ink);
}
.legal-topbar__tag {
  font-family: var(--mono); font-size: 10px; letter-spacing: .1em;
  color: var(--ink-3); border-left: 1px solid var(--line-strong); padding-left: 12px;
}
.lang-switch { display: inline-flex; border: 1px solid var(--line-strong); border-radius: 3px; overflow: hidden; }
.lang-switch button {
  font-family: var(--mono); font-size: 11px; letter-spacing: .06em;
  min-height: 32px; padding: 0 12px; border: 0; cursor: pointer;
  background: var(--surface); color: var(--ink-2);
}
.lang-switch button + button { border-left: 1px solid var(--line-strong); }
.lang-switch button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.back-link { font-family: var(--mono); font-size: 11px; color: var(--ink-2); }

/* 页头 ------------------------------------------------------------------ */
.legal-hero {
  max-width: 1180px; margin: 0 auto; padding: clamp(40px, 6vw, 76px) 28px 34px;
  border-bottom: 1px solid var(--line);
}
.legal-hero__eyebrow {
  margin: 0 0 14px; font-family: var(--mono); font-size: 10.5px;
  letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3);
}
.legal-hero h1 {
  margin: 0; max-width: 20ch;
  font-size: clamp(34px, 6vw, 62px); line-height: 1.06;
  font-weight: 600; letter-spacing: -.04em;
}
.legal-hero__meta {
  display: flex; gap: 10px 28px; flex-wrap: wrap; margin: 26px 0 0;
  font-family: var(--mono); font-size: 11px; color: var(--ink-3);
}
.legal-hero__meta strong { color: var(--ink-2); font-weight: 600; }

/* 主体：左侧 sticky 目录 + 右侧正文 ------------------------------------- */
.legal-shell {
  display: grid; grid-template-columns: 218px minmax(0, 1fr); gap: clamp(28px, 5vw, 72px);
  max-width: 1180px; margin: 0 auto; padding: 40px 28px 90px;
}
.legal-aside { position: sticky; top: 32px; align-self: start; }
.legal-aside h2 {
  margin: 0 0 14px; font-family: var(--mono); font-size: 10px;
  letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3);
}
.toc { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.toc li { border-bottom: 1px solid var(--line); }
.toc a {
  display: grid; grid-template-columns: 28px minmax(0, 1fr); gap: 8px;
  padding: 9px 0; font-family: var(--sans); font-size: 12px; line-height: 1.4;
  color: var(--ink-2); text-decoration: none;
}
.toc a span { font-family: var(--mono); font-size: 10px; color: var(--ink-3); padding-top: 2px; }
.toc a:hover, .toc a[aria-current="true"] { color: var(--accent); }
.aside-note {
  margin: 24px 0 0; font-family: var(--sans); font-size: 11.5px;
  line-height: 1.6; color: var(--ink-3);
}

.legal-doc { min-width: 0; max-width: 76ch; }
.legal-doc__lead {
  margin: 0 0 42px; padding-bottom: 30px; border-bottom: 1px solid var(--line);
  font-size: clamp(17px, 2vw, 20px); line-height: 1.6; color: var(--ink);
}
.clause { padding: 26px 0 30px; border-bottom: 1px solid var(--line); scroll-margin-top: 28px; }
.clause__no {
  margin: 0 0 10px; font-family: var(--mono); font-size: 10.5px;
  letter-spacing: .12em; color: var(--ink-3);
}
.clause h2 {
  margin: 0 0 14px; font-size: clamp(20px, 2.4vw, 25px);
  line-height: 1.25; font-weight: 600; letter-spacing: -.025em;
}
.clause p { margin: 0 0 12px; color: var(--ink-2); }
.clause p:last-child { margin-bottom: 0; }
.clause strong { color: var(--ink); font-weight: 650; }
.clause ul { margin: 0 0 12px; padding-left: 22px; color: var(--ink-2); }
.clause li { margin-bottom: 7px; }
.clause code {
  font-family: var(--mono); font-size: .86em; padding: 1px 5px;
  border: 1px solid var(--line); border-radius: 3px; background: var(--surface-2);
}
.callout {
  margin: 0 0 42px; padding: 18px 20px;
  border-left: 3px solid var(--accent); background: var(--surface-2);
  font-family: var(--sans); font-size: 13.5px; line-height: 1.7; color: var(--ink-2);
}
.callout strong { color: var(--ink); }

/* 页脚 ------------------------------------------------------------------ */
.legal-footer {
  border-top: 1px solid var(--line); background: var(--surface);
}
.legal-footer__inner {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  max-width: 1180px; margin: 0 auto; padding: 34px 28px 46px;
  font-family: var(--sans); font-size: 12.5px; color: var(--ink-3);
}
.legal-footer__links { display: flex; gap: 10px 22px; flex-wrap: wrap; }
.legal-footer p { margin: 0 0 8px; }

/* 响应式 ---------------------------------------------------------------- */
@media (max-width: 820px) {
  .legal-shell { grid-template-columns: 1fr; gap: 26px; padding-top: 28px; }
  .legal-aside { position: static; }
  .toc { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); column-gap: 20px; }
  .aside-note { margin-top: 18px; }
  .legal-topbar { padding-inline: 20px; }
  .legal-hero, .legal-shell, .legal-footer__inner { padding-inline: 20px; }
}
@media (max-width: 420px) {
  .legal-topbar__tag { display: none; }
  .legal-hero__meta { flex-direction: column; gap: 4px; }
  .legal-topbar__name { font-size: 10.5px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}
@media print {
  .legal-topbar, .legal-aside, .legal-footer, .lang-switch { display: none !important; }
  body { background: #fff; color: #000; font-size: 11pt; }
  .legal-shell { display: block; padding: 0; }
  .legal-doc { max-width: none; }
  .clause { break-inside: avoid; border-color: #ccc; }
  a { color: #000; }
}