:root{color-scheme:light;--ink:#22252a;--muted:#727780;--line:#e8e9ec;--blue:#285ea5}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:#fff;font:16px/1.85 Georgia,"Noto Serif CJK SC","Songti SC",serif}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}header{max-width:1330px;margin:auto;padding:27px 48px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;font:14px/1.6 system-ui,sans-serif}.brand{color:var(--ink);font-size:20px;font-weight:600;letter-spacing:-.5px}.brand span{display:inline-block;margin-left:18px;color:var(--muted);font-weight:400;font-size:14px;letter-spacing:0}.layout{max-width:1234px;margin:0 auto;display:grid;grid-template-columns:242px minmax(0,1fr);gap:70px;padding:48px 0}aside{font-family:system-ui,sans-serif;align-self:start;position:sticky;top:30px}.aside-label{font-size:12px;letter-spacing:1.5px;color:var(--muted);margin-bottom:20px}nav{display:flex;flex-direction:column;border-left:1px solid var(--line)}nav a{font-size:14px;line-height:1.5;padding:9px 10px 9px calc(16px + var(--depth)*14px);color:#626872;overflow-wrap:anywhere}nav a.active{color:var(--blue);background:#f3f6fa;border-left:2px solid var(--blue);margin-left:-1px}main{min-width:0;max-width:770px;padding-right:22px}.breadcrumbs{display:flex;flex-wrap:wrap;gap:10px;font:13px/1.6 system-ui,sans-serif;color:#a2a6ac;margin-bottom:38px}.breadcrumbs a{color:var(--muted)}h1{font-size:38px;font-weight:500;line-height:1.4;letter-spacing:-.7px;margin:0 0 26px}h2{font-size:24px;font-weight:500;margin:38px 0 15px}h3{font-size:19px}p{margin:16px 0}article>h1+p{font-size:18px;color:#626872;line-height:1.9;margin-bottom:32px}article a{text-decoration:underline;text-underline-offset:3px}blockquote{border-left:2px solid #c6d3e5;padding:1px 20px;margin:25px 0;color:#626872}pre{background:#f7f8fa;border:1px solid var(--line);padding:20px;overflow:auto;font-size:14px;line-height:1.7}code{font-family:ui-monospace,monospace;font-size:.88em;overflow-wrap:anywhere}table{display:block;max-width:100%;overflow:auto;border-collapse:collapse;font-size:15px}td,th{border-bottom:1px solid var(--line);padding:10px 16px;text-align:left}img{max-width:100%;height:auto}hr{border:0;border-top:1px solid var(--line);margin:32px 0}.children{margin-top:42px;border-top:1px solid var(--line)}.children h2{font-family:system-ui,sans-serif;font-size:14px;color:var(--muted);margin:22px 0 12px}.children>a{display:block;padding:17px 0;border-bottom:1px solid var(--line)}.children strong{display:block;font-weight:500;font-size:20px}.children span{display:block;color:var(--muted);font-size:14px;margin-top:5px}footer{border-top:1px solid var(--line);margin-top:66px;padding-top:20px;color:var(--muted);font:12px system-ui,sans-serif}.skip{position:absolute;top:-100px}.skip:focus{top:0;background:white;padding:15px;z-index:4}a:focus-visible{outline:2px solid var(--blue);outline-offset:4px}@media(max-width:1100px){.layout{padding:35px 32px;gap:38px;grid-template-columns:205px minmax(0,1fr)}}@media(max-width:700px){header{padding:20px 22px}.brand span{display:block;margin-left:0;font-size:12px}.layout{display:block;padding:25px 22px}aside{position:static;margin-bottom:30px}nav{max-height:190px;overflow:auto}.aside-label{margin-bottom:10px}main{padding:0}.breadcrumbs{margin-bottom:25px}h1{font-size:30px}article>h1+p{font-size:17px}}

.friend-label{font-size:13px;margin-bottom:12px}.friend-links{display:flex;flex-wrap:wrap;gap:14px 28px;font-size:14px;line-height:1.8}

.friend-links a{display:inline-block;white-space:nowrap;padding:3px 0}