:root{color-scheme:light;--bg:#fff;--surface:#f4f6fa;--text:#17263a;--muted:#53657c;--line:#dde4ee;--link:#3269cb}
@media(prefers-color-scheme:dark){:root{color-scheme:dark;--bg:#101824;--surface:#192435;--text:#edf2fa;--muted:#a7b8ce;--line:#2d3b50;--link:#9ec1ff}}
*{box-sizing:border-box}html{scroll-padding-top:24px}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.85 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}a{color:var(--link);text-underline-offset:4px;overflow-wrap:anywhere}a:hover{text-decoration-thickness:2px}:focus-visible{outline:3px solid var(--link);outline-offset:5px}.skip{position:absolute;top:-80px;padding:12px;background:var(--bg)}.skip:focus{top:0}.header{max-width:1120px;margin:auto;padding:22px 32px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;color:var(--text);font-weight:680;text-decoration:none;line-height:1.3}.brand img{width:42px;height:42px}.header nav{display:flex;gap:24px;align-items:center;font-size:14px}.layout{max-width:1120px;margin:0 auto;padding:48px 32px 72px;display:grid;grid-template-columns:190px minmax(0,1fr);gap:64px}.contents{position:sticky;top:28px;align-self:start;font-size:14px;line-height:1.6}.contents p{font-weight:650;margin:0 0 16px}.contents a{display:block;text-decoration:none;color:var(--muted);padding:7px 0}.contents a:hover{color:var(--link)}main{max-width:740px;min-width:0}h1{font-size:42px;letter-spacing:-1px;line-height:1.25;margin:0 0 14px}h2{font-size:23px;line-height:1.45;letter-spacing:-.3px;margin:0 0 16px}h3{font-size:17px;margin:20px 0 6px}p{margin:0 0 16px}.meta{font-size:13px;color:var(--muted)}.intro{font-size:18px;color:var(--muted);margin:25px 0}.summary{background:var(--surface);border-left:3px solid var(--link);padding:18px 22px;margin:26px 0 34px}.summary p{margin:0}.summary strong{font-weight:650}section{margin-top:34px;padding-top:28px;border-top:1px solid var(--line)}ul{padding-left:22px}li{margin:10px 0}.data-list{margin:0}.data-list div{padding:16px 0;border-bottom:1px solid var(--line)}.data-list div:first-child{padding-top:0}.data-list dt{font-weight:650}.data-list dd{margin:5px 0 0;color:var(--muted)}code{font:13px/1.5 ui-monospace,SFMono-Regular,monospace;overflow-wrap:anywhere;background:var(--surface);padding:2px 5px;border-radius:4px}.footer{max-width:1120px;margin:auto;padding:24px 32px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:13px}.footer nav{display:flex;gap:20px}
@media(max-width:800px){.layout{grid-template-columns:1fr;gap:28px;padding:30px 24px 48px}.contents{position:static;border-bottom:1px solid var(--line);padding-bottom:20px;display:flex;flex-wrap:wrap;gap:4px 20px}.contents p{width:100%;margin:0 0 4px}.contents a{padding:3px 0}.header{padding:18px 24px}.header nav{gap:16px}.back{display:none}h1{font-size:34px}.intro{font-size:16px}.footer{padding:22px 24px;flex-wrap:wrap}main{max-width:none}}
@media(max-width:380px){.header,.layout,.footer{padding-left:18px;padding-right:18px}.brand{font-size:14px;gap:8px}.brand img{width:34px;height:34px}.header nav{font-size:13px}.summary{padding:16px}h1{font-size:30px}}