*{box-sizing:border-box}
:root{--ink:#20242b;--muted:#667085;--line:#e5e7eb;--blue:#1769aa}
html{scroll-behavior:smooth;scroll-padding-top:82px}
body{margin:0;background:#fff;color:var(--ink);font:16px/1.78 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans SC","Microsoft YaHei",sans-serif}
a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}
.topbar{height:62px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100vw - 1180px)/2));position:sticky;top:0;background:rgba(255,255,255,.96);z-index:5;gap:12px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:650}.brand-mark{width:28px;height:28px;display:grid;place-items:center;background:#1769aa;color:white;border-radius:6px;font-weight:700}
.library-home{font-size:13px;color:#1769aa;margin-left:auto;margin-right:8px;white-space:nowrap}
.menu-toggle{display:none;border:1px solid var(--line);background:white;border-radius:6px;padding:6px 12px;color:var(--ink)}
.layout{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:230px minmax(0,1fr);gap:56px;padding:30px 24px 80px}
.sidebar{align-self:start;position:sticky;top:88px;max-height:calc(100vh - 110px);overflow:auto;padding-right:8px}
.side-label{font-size:12px;letter-spacing:.08em;color:#98a2b3;font-weight:700;margin:0 0 12px 12px}
#toc{display:flex;flex-direction:column;gap:2px}#toc a{font-size:13px;line-height:1.45;padding:8px 12px;color:#596273;border-radius:5px;border-left:2px solid transparent}#toc a.active{background:#f1f6fb;color:#145b91;border-left-color:#1769aa;font-weight:600}#toc a:hover{background:#f7f9fb;text-decoration:none}
.content{min-width:0;max-width:820px}.hero{padding:24px 0 30px;border-bottom:1px solid var(--line);margin-bottom:24px}
.eyebrow{font-size:11px;letter-spacing:.13em;color:#1769aa;font-weight:700}.hero h1{font-size:36px;line-height:1.25;letter-spacing:-.03em;margin:12px 0}.lead{font-size:18px;line-height:1.7;color:#525d6b;max-width:700px}
.hero-meta{display:flex;gap:9px;flex-wrap:wrap;margin:18px 0}.hero-meta span{font-size:12px;color:#586474;background:#f4f6f8;padding:4px 9px;border-radius:4px}
.notice,.tip,.warning{padding:13px 16px;margin:18px 0;border-left:3px solid #7b9bb7;background:#f6f8fa;color:#3e4855;font-size:14px}.tip{border-left-color:#4b8bba;background:#f3f8fc}.warning{border-left-color:#c58b37;background:#fffaf1}
section{padding:20px 0 28px;border-bottom:1px solid var(--line)}h2{font-size:24px;line-height:1.4;margin:0 0 14px;letter-spacing:-.015em}h3{font-size:18px;margin:22px 0 8px}p{margin:10px 0}ul,ol{padding-left:24px}li{margin:7px 0}.steps{padding-left:26px}.steps li{padding-left:4px;margin:14px 0}.steps p{margin:4px 0;color:#566170}
.action-links{display:flex;gap:18px;align-items:center;flex-wrap:wrap;margin:18px 0}.primary-link{display:inline-block;background:#1769aa;color:#fff;padding:8px 14px;border-radius:5px;font-size:14px}.primary-link:hover{background:#12588f;text-decoration:none}
.simple-table{border:1px solid var(--line);border-radius:6px;overflow:hidden;margin:16px 0}.simple-table>div{display:grid;grid-template-columns:160px 1fr;gap:16px;padding:12px 14px;border-bottom:1px solid var(--line);font-size:14px}.simple-table>div:last-child{border:0}.simple-table b{font-weight:650}.simple-table span{color:#596474}
.example{background:#f7f8fa;border:1px solid var(--line);padding:14px 16px;border-radius:5px;margin:18px 0}.example pre{white-space:pre-wrap;font:14px/1.8 ui-monospace,SFMono-Regular,Consolas,monospace;margin:10px 0 0;color:#344054}
code{background:#f2f4f7;padding:2px 5px;border-radius:3px;font-size:.9em}.small-note{font-size:13px;color:#737e8c}
.official-image{border:1px solid var(--line);padding:14px;margin:20px 0;border-radius:6px;background:#fff}.official-image-label{font-size:13px;font-weight:650;margin-bottom:10px}.official-image img{display:block;max-width:100%;height:auto;border:1px solid #e5e7eb}.official-image p{font-size:12px;color:#77808d;margin:8px 0 0}
details{border-bottom:1px solid var(--line);padding:12px 2px}details:first-of-type{border-top:1px solid var(--line)}summary{cursor:pointer;font-weight:600}details p{color:#596474;font-size:14px}
.checklist{display:grid;gap:10px;margin:18px 0}.checklist label{display:flex;gap:10px;align-items:flex-start;padding:9px 12px;border:1px solid var(--line);border-radius:5px;font-size:14px}.checklist input{margin-top:6px;accent-color:#1769aa}
.source-list li{margin:9px 0}footer{padding:28px 0;color:#929aa5;font-size:12px}
@media(max-width:850px){.layout{grid-template-columns:1fr;gap:0;padding:20px 20px 60px}.sidebar{position:static;max-height:none;padding:0 0 16px;display:none;border-bottom:1px solid var(--line);margin-bottom:20px}.sidebar.open{display:block}.menu-toggle{display:block}.topbar{padding:0 20px}.content{max-width:none}}
@media(max-width:520px){body{font-size:15px}.layout{padding-left:16px;padding-right:16px}.topbar{padding:0 16px}.hero h1{font-size:27px}.lead{font-size:16px}.simple-table>div{grid-template-columns:1fr;gap:2px}.simple-table span{font-size:13px}h2{font-size:21px}.library-home{font-size:11px;margin-right:0}}