:root{
  --primary:#533afd;
  --primary-deep:#4128ea;
  --primary-pale:#f0eeff;
  --ink:#1c1e54;
  --text:#29384d;
  --muted:#69778c;
  --hair:#e5e9f2;
  --canvas:#f7f8fc;
  --white:#fff;
  --shadow:0 18px 50px rgba(28,30,84,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{margin:0;background:var(--canvas);color:var(--text);font-family:Inter,"Noto Sans SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button{font:inherit}
.site-nav{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.92);border-bottom:1px solid rgba(229,233,242,.9);backdrop-filter:blur(16px)}
.nav-inner{width:min(1180px,calc(100% - 40px));height:68px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:600;letter-spacing:-.02em}
.brand img{width:30px;height:30px;border-radius:8px}
.nav-links{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px}
.nav-links a{padding:8px 10px;border-radius:8px}
.nav-links a:hover,.nav-links a[aria-current="page"]{background:var(--primary-pale);color:var(--primary)}
.hero{position:relative;overflow:hidden;background:var(--white);border-bottom:1px solid var(--hair)}
.hero:before{content:"";position:absolute;width:620px;height:340px;left:50%;top:-230px;transform:translateX(-50%);background:radial-gradient(ellipse,rgba(83,58,253,.18),rgba(83,58,253,0) 70%);pointer-events:none}
.hero-inner{position:relative;width:min(1180px,calc(100% - 40px));margin:auto;padding:72px 0 62px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase}
.eyebrow:before{content:"";width:22px;height:1px;background:currentColor}
.hero h1{max-width:760px;margin:18px 0 14px;color:var(--ink);font-size:clamp(38px,6vw,66px);font-weight:500;line-height:1.05;letter-spacing:-.05em}
.hero p{max-width:700px;margin:0;color:var(--muted);font-size:16px;line-height:1.8;font-weight:300}
.version-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
.version-pill{display:inline-flex;align-items:center;gap:7px;padding:8px 11px;border:1px solid var(--hair);border-radius:999px;background:rgba(255,255,255,.76);color:var(--muted);font-size:12px}
.version-pill strong{color:var(--ink);font-weight:500}
.page-shell{width:min(1180px,calc(100% - 40px));margin:40px auto 80px;display:grid;grid-template-columns:250px minmax(0,1fr);gap:36px;align-items:start}
.side{position:sticky;top:94px}
.side-box{padding:18px;border:1px solid var(--hair);border-radius:16px;background:var(--white);box-shadow:0 10px 30px rgba(28,30,84,.04)}
.side-label{margin:0 0 10px;color:var(--ink);font-size:12px;font-weight:600;letter-spacing:.08em}
.doc-switch,.toc{display:grid;gap:4px}
.doc-switch{padding-bottom:14px;margin-bottom:14px;border-bottom:1px solid var(--hair)}
.doc-switch a,.toc a{display:block;padding:8px 9px;border-radius:8px;color:var(--muted);font-size:12px;line-height:1.45;transition:.16s}
.doc-switch a:hover,.toc a:hover{background:var(--primary-pale);color:var(--primary)}
.doc-switch a[aria-current="page"]{background:var(--primary);color:#fff}
.toc a.active{background:var(--primary-pale);color:var(--primary);font-weight:500}
.toc a.depth-3{padding-left:22px;font-size:11px}
.article{min-width:0;padding:56px clamp(26px,5vw,70px);border:1px solid var(--hair);border-radius:22px;background:var(--white);box-shadow:var(--shadow)}
.article-head{padding-bottom:28px;margin-bottom:34px;border-bottom:1px solid var(--hair)}
.article-head .doc-kicker{margin:0 0 10px;color:var(--primary);font-size:12px;font-weight:600;letter-spacing:.1em}
.article-head h1{margin:0 0 16px;color:var(--ink);font-size:clamp(30px,4vw,46px);line-height:1.2;letter-spacing:-.035em;font-weight:500}
.article-head .meta{display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--muted);font-size:12px}
.legal-copy{font-family:"Noto Sans SC","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.95}
.legal-copy h2,.legal-copy h3{color:var(--ink);scroll-margin-top:94px}
.legal-copy h2{margin:52px 0 18px;padding-top:4px;font-size:22px;line-height:1.4;font-weight:500;letter-spacing:-.015em}
.legal-copy h2:before{content:"";display:block;width:34px;height:3px;margin-bottom:12px;border-radius:3px;background:var(--primary)}
.legal-copy h3{margin:32px 0 14px;font-size:17px;font-weight:500}
.legal-copy p{margin:0 0 16px}
.legal-copy strong{color:var(--ink);font-weight:600}
.legal-copy ol,.legal-copy ul{margin:0 0 24px;padding-left:1.55em}
.legal-copy li{padding-left:.3em;margin:0 0 10px}
.legal-copy li::marker{color:var(--primary);font-weight:600}
.legal-copy blockquote{margin:24px 0;padding:18px 20px;border-left:3px solid var(--primary);border-radius:0 12px 12px 0;background:var(--primary-pale);color:var(--ink)}
.legal-copy code{padding:.1em .35em;border-radius:4px;background:#f1f3f8;color:#364152;font-family:"JetBrains Mono",Consolas,monospace;font-size:.88em}
.legal-copy a{color:var(--primary);text-decoration:underline;text-decoration-color:rgba(83,58,253,.28);text-underline-offset:3px}
.legal-copy hr{border:0;border-top:1px solid var(--hair);margin:36px 0}
.legal-copy table{width:100%;border-collapse:separate;border-spacing:0;margin:24px 0;border:1px solid var(--hair);border-radius:12px;overflow:hidden;font-size:13px;line-height:1.65}
.legal-copy th,.legal-copy td{padding:12px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--hair);border-right:1px solid var(--hair)}
.legal-copy th:last-child,.legal-copy td:last-child{border-right:0}
.legal-copy tr:last-child td{border-bottom:0}
.legal-copy th{background:#f6f7fb;color:var(--ink);font-weight:500}
.back-top{display:inline-flex;margin-top:32px;color:var(--primary);font-size:13px}
.legal-footer{padding:34px 20px;border-top:1px solid var(--hair);background:var(--white);color:var(--muted);font-size:12px;text-align:center;line-height:1.7}
.cards{width:min(1180px,calc(100% - 40px));margin:40px auto 80px;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.legal-card{position:relative;min-height:260px;padding:28px;border:1px solid var(--hair);border-radius:20px;background:var(--white);box-shadow:0 12px 36px rgba(28,30,84,.05);transition:.2s}
.legal-card:hover{transform:translateY(-3px);border-color:#d7d1ff;box-shadow:var(--shadow)}
.card-index{display:block;color:var(--primary);font:500 12px/1 Inter,sans-serif;letter-spacing:.12em}
.legal-card h2{margin:24px 0 12px;color:var(--ink);font-size:23px;font-weight:500;line-height:1.35}
.legal-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.75;font-weight:300}
.card-link{position:absolute;left:28px;bottom:26px;color:var(--primary);font-size:13px;font-weight:500}
.notice{grid-column:1/-1;display:flex;align-items:flex-start;gap:12px;padding:18px 20px;border:1px solid #dcd7ff;border-radius:14px;background:var(--primary-pale);color:var(--ink);font-size:13px;line-height:1.65}
.notice:before{content:"i";display:grid;place-items:center;flex:0 0 22px;width:22px;height:22px;border-radius:50%;background:var(--primary);color:#fff;font:600 12px/1 Inter,sans-serif}
.mobile-docs{display:none;width:100%;margin-top:24px;padding:12px;border:1px solid var(--hair);border-radius:10px;background:#fff;color:var(--ink)}
:focus-visible{outline:3px solid rgba(83,58,253,.28);outline-offset:3px}
@media(max-width:860px){
  .nav-inner{width:min(100% - 28px,1180px)}
  .nav-links a:not(:last-child){display:none}
  .hero-inner{width:min(100% - 32px,1180px);padding:52px 0 44px}
  .page-shell{width:min(100% - 24px,1180px);grid-template-columns:1fr;margin-top:24px;gap:16px}
  .side{display:none}
  .article{padding:34px 22px;border-radius:16px}
  .mobile-docs{display:block}
  .cards{width:min(100% - 24px,1180px);grid-template-columns:1fr;margin-top:24px}
  .legal-card{min-height:225px}
}
@media(max-width:520px){
  .hero h1{font-size:38px}
  .article{padding:30px 18px}
  .legal-copy{font-size:14px;line-height:1.9}
  .legal-copy h2{font-size:20px}
  .legal-copy table{display:block;overflow-x:auto;white-space:nowrap}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.legal-card{transition:none}}
@media print{
  body{background:#fff}.site-nav,.hero,.side,.mobile-docs,.back-top,.legal-footer{display:none!important}
  .page-shell{display:block;width:100%;margin:0}.article{padding:0;border:0;box-shadow:none}
  .legal-copy{font-size:11pt;line-height:1.75}.legal-copy h2{break-after:avoid}.legal-copy li{break-inside:avoid}
}