/* 用户协议 / 隐私政策：品牌浅色，长文阅读排版 */
:root{
  --bg:#FAF9F5; --paper:#F3F1EA; --surface:#FFFFFF; --ink:#141413; --ink-2:#3D3D3A; --muted:#73726C; --faint:#A8A69D;
  --line:#E8E6DC; --line-strong:#DAD8CE; --clay:#C96442; --clay-soft:rgba(201,100,66,.1);
  --serif:"Tiempos Headline",ui-serif,"New York",Georgia,"Songti SC","Noto Serif SC","Source Han Serif SC","STSong",serif;
  --sans:-apple-system,BlinkMacSystemFont,"SF Pro Text","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --gutter:clamp(16px,5vw,72px);
  color-scheme:light;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:80px;-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased}
a{color:var(--clay);text-decoration:none}
a:hover{text-decoration:underline}
::selection{background:var(--clay);color:#fff}
.nav{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:24px;height:56px;padding:0 var(--gutter);background:rgba(250,249,245,.8);backdrop-filter:saturate(1.8) blur(20px);-webkit-backdrop-filter:saturate(1.8) blur(20px);border-bottom:1px solid var(--line)}
.nav-brand{display:flex;align-items:center;gap:9px;font-weight:600;color:var(--ink);margin-right:auto}
.nav-brand:hover{text-decoration:none}
.nav-brand img{width:28px;height:28px;border-radius:8px}
.nav a.tab{font-size:14px;color:var(--ink-2)}
.nav a.tab.on{color:var(--clay);font-weight:600}
.hero{max-width:1120px;margin:0 auto;padding:clamp(56px,8vw,96px) var(--gutter) 40px}
.hero h1{font-family:var(--serif);font-weight:500;font-size:clamp(38px,6vw,64px);line-height:1.15;letter-spacing:-.01em}
.meta{margin-top:18px;font-size:14px;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px 20px}
.layout{max-width:1120px;margin:0 auto;padding:0 var(--gutter) 80px;display:grid;grid-template-columns:240px minmax(0,1fr);gap:56px;align-items:start}
.toc{position:sticky;top:84px;max-height:calc(100vh - 110px);overflow:auto;font-size:13.5px;line-height:1.5;padding-right:8px}
.toc p{font-weight:600;color:var(--ink);margin-bottom:10px}
.toc ol{list-style:none;display:grid;gap:2px;border-left:1px solid var(--line)}
.toc a{display:block;color:var(--muted);padding:5px 0 5px 14px;margin-left:-1px;border-left:2px solid transparent}
.toc a:hover{color:var(--ink);text-decoration:none}
.toc a.on{color:var(--clay);border-left-color:var(--clay)}
.doc{min-width:0;max-width:760px}
.notice{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--clay);border-radius:14px;padding:20px 22px;margin-bottom:40px;color:var(--ink-2)}
.notice p+p{margin-top:8px}
.doc h2{font-family:var(--serif);font-weight:500;font-size:28px;line-height:1.3;margin:56px 0 16px;padding-top:4px}
.doc h2:first-of-type{margin-top:0}
.doc h3{font-size:17.5px;font-weight:600;margin:28px 0 8px}
.doc p,.doc li{color:var(--ink-2)}
.doc p+p{margin-top:10px}
.doc ol,.doc ul{padding-left:1.4em;margin:8px 0}
.doc li+li{margin-top:6px}
.doc b,.doc strong{color:var(--ink);font-weight:600}
.doc u{text-decoration:none;background:linear-gradient(transparent 62%,rgba(201,100,66,.22) 62%)}
.table-wrap{overflow-x:auto;margin:14px 0;border:1px solid var(--line);border-radius:14px;background:var(--surface)}
table{border-collapse:collapse;width:100%;min-width:640px;font-size:14px;line-height:1.65}
th,td{text-align:left;vertical-align:top;padding:12px 14px;border-bottom:1px solid var(--line)}
th{background:var(--paper);font-weight:600;color:var(--ink);white-space:nowrap}
tr:last-child td{border-bottom:0}
td{color:var(--ink-2)}
.contact-box{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px 22px;margin-top:12px}
.footer{max-width:1120px;margin:0 auto;padding:40px var(--gutter) 50px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:8px 22px}
.footer a{color:var(--muted)}
.footer a:hover{color:var(--clay)}
.footer .grow{margin-right:auto}
@media (max-width:900px){
  .layout{grid-template-columns:1fr;gap:0}
  .toc{position:static;max-height:none;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin-bottom:36px}
  .toc ol{border-left:0}
  .toc a{padding:5px 0;border-left:0}
  .nav a.tab{display:none}
}
@media print{
  .nav,.toc,.footer{display:none}
  .layout{display:block}
  body{background:#fff}
}