:root{color-scheme:light;--ink:#182b3e;--muted:#53677c;--blue:#0763a8;--line:#d6e0e9;--paper:#fff;--bg:#f1f5f9}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.9 "Microsoft YaHei","PingFang SC",system-ui,sans-serif}a{color:var(--blue);text-underline-offset:4px}a:hover{color:#00385f}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #db9400;outline-offset:4px}header{min-height:96px;background:#102b44;color:white;display:flex;align-items:center;justify-content:space-between;padding:18px 4vw;gap:20px}.brand{display:flex;align-items:center;gap:17px;color:white;text-decoration:none;font-size:22px;font-weight:700}.brand:hover{color:white}.brand small{display:block;font-size:14px;font-weight:400;color:#bed2e4;line-height:1.5}.brand-mark{display:grid;place-items:center;border:1px solid #7996af;width:48px;height:48px;font:32px Georgia,serif}.edition{font-size:14px;color:#c6d8e8}.layout{display:grid;grid-template-columns:285px minmax(0,1fr);max-width:1500px;margin:auto}aside{padding:28px 22px;border-right:1px solid var(--line);background:#eaf0f6;align-self:start;position:sticky;top:0;max-height:100vh;overflow:auto}aside nav a{display:block;font-size:14px;line-height:1.65;padding:9px 12px;margin:3px 0;border-radius:4px;text-decoration:none;color:#28425a;border-left:3px solid transparent}aside nav a[aria-current="page"]{background:#d7e8f6;border-left-color:var(--blue);color:#064f88;font-weight:700}aside nav a:hover{background:#dfeaf3}.home-link{font-weight:700;text-decoration:none}.progress-box{margin:18px 0;padding:15px 12px;background:white;border:1px solid var(--line);font-size:15px}.progress-box small{display:block;font-size:12px;line-height:1.7;color:var(--muted);margin-top:7px}main{min-width:0;background:var(--paper);padding:40px clamp(22px,4.5vw,72px);min-height:85vh}article,section{max-width:900px;margin:auto}article:focus,section:focus{outline:none}h1{font-size:clamp(27px,3vw,39px);line-height:1.4;letter-spacing:-.5px;margin:0 0 24px}h2{font-size:24px;line-height:1.5;margin:38px 0 16px;padding-top:8px}h3{font-size:20px}p{margin:16px 0}li{margin:9px 0}ol,ul{padding-left:1.65em}figure{margin:28px 0;border:1px solid var(--line);border-radius:7px;overflow:hidden;background:#f7fbff}figure img{width:100%;height:auto;display:block}figcaption{font-size:13px;color:var(--muted);padding:10px 16px;border-top:1px solid #e0e8ef;background:#f7fbff;line-height:1.6}.table-wrap{overflow-x:auto;margin:24px 0}table{border-collapse:collapse;font-size:15px;width:100%;line-height:1.8}th,td{text-align:left;border:1px solid var(--line);padding:12px 14px;min-width:115px;vertical-align:top}th{background:#eaf2f9;color:#123e61}tr:nth-child(even) td{background:#f8fafc}details{border:1px solid #bfd3e3;border-radius:6px;padding:16px 20px;margin:24px 0;background:#f6faff}summary{cursor:pointer;color:#075386;font-weight:700}details[open] summary{border-bottom:1px solid var(--line);padding-bottom:12px}code{font-family:Consolas,monospace;background:#edf1f5;padding:2px 5px;border-radius:3px;font-size:.91em;overflow-wrap:anywhere}.pager{display:flex;justify-content:space-between;gap:24px;margin:30px 0;border-top:1px solid var(--line);padding-top:22px;font-size:15px}.source-link{font-size:13px;color:var(--muted)}.completion{display:block;padding:18px;background:#eaf4fb;margin-top:36px;font-size:15px}.completion input{width:19px;height:19px;vertical-align:middle;margin-right:10px;accent-color:var(--blue)}.eyebrow{font-size:14px;font-weight:700;color:var(--blue);letter-spacing:1px;margin-top:0}.lead{font-size:19px;color:var(--muted)}.start-card{border:1px solid #b7d0e5;background:#edf6fe;display:flex;align-items:center;justify-content:space-between;gap:25px;padding:28px;margin:30px 0}.start-card h2{margin:10px 0;padding:0}.start-card p{font-size:15px;margin:10px 0 0}.tag{font-size:13px;font-weight:700;color:var(--blue)}.button{background:var(--blue);color:white;text-decoration:none;white-space:nowrap;padding:12px 19px;font-size:16px;border-radius:4px}.button:hover{background:#07466f;color:white}.home-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.tile{text-decoration:none;color:var(--ink);border-top:3px solid #1c6aa2;padding:16px;background:#f5f8fb}.tile span{font-size:12px;color:var(--muted)}.tile h2{font-size:19px;margin:13px 0;padding:0}.tile p{font-size:14px;line-height:1.8;margin:8px 0}footer{max-width:1500px;margin:auto;font-size:13px;color:var(--muted);padding:20px 30px}.skip{position:absolute;top:-100px;left:15px;background:white;padding:12px;z-index:5}.skip:focus{top:10px}[hidden]{display:none!important}@media(max-width:900px){.layout{grid-template-columns:225px minmax(0,1fr)}aside{padding:20px 12px}.home-grid{grid-template-columns:1fr}.start-card{align-items:flex-start;flex-direction:column}}@media(max-width:650px){header{padding:16px 20px}.brand{font-size:19px}.edition{display:none}.layout{display:block}aside{position:static;max-height:none;border-right:0;padding:18px 20px}aside nav{display:flex;overflow-x:auto;gap:5px;padding-top:10px}aside nav a{white-space:nowrap;border-left:0;border-bottom:3px solid transparent}aside nav a[aria-current="page"]{border-bottom-color:var(--blue)}.progress-box{margin:10px 0;padding:10px}.progress-box small{font-size:12px}main{padding:28px 20px}body{font-size:16px}h2{font-size:22px}.pager{flex-wrap:wrap}figure{margin:22px -6px}th,td{padding:10px;min-width:120px}}@media print{header,aside,footer,.pager,.source-link,.completion,.skip{display:none}.layout{display:block}main{padding:0}article[hidden],section[hidden]{display:none!important}details{break-inside:avoid}figure{break-inside:avoid}body{font-size:12pt;background:white}h1{font-size:24pt}}

.menu-toggle{display:none}@media(max-width:650px){.menu-toggle{display:flex;justify-content:space-between;align-items:center;width:100%;min-height:48px;padding:10px 14px;background:white;border:1px solid #b7cddd;border-radius:4px;color:#075386;font:inherit;font-weight:700;cursor:pointer}aside nav{display:none}aside.menu-open nav{display:block;max-height:60vh;overflow-y:auto}aside nav a{white-space:normal;padding:12px;min-height:48px}.progress-box{font-size:14px}.table-wrap{max-width:100%}figure a{display:block;min-height:44px}}