:root{--paper:#f6f5f1;--ink:#182a2a;--green:#22736a;--copper:#a16f4d;--muted:#62716e;--line:#d9dfd8;font-family:Inter,"Noto Sans SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}body{margin:0}a{color:var(--green);text-underline-offset:4px}button,input{font:inherit}a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--green);outline-offset:4px}[hidden]{display:none!important}.skip{position:fixed;top:-80px;left:20px;background:var(--ink);color:white;padding:12px;z-index:10}.skip:focus{top:10px}.masthead{min-height:84px;padding:22px clamp(20px,5vw,76px);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{color:var(--ink);font-size:21px;font-weight:700;letter-spacing:.13em;text-decoration:none}.brand span{font-size:12px;font-weight:400;letter-spacing:.08em;margin-left:20px;color:var(--muted)}.masthead nav{display:flex;gap:25px;font-size:13px}.masthead nav a{text-decoration:none}.reading-layout{max-width:1360px;margin:auto;padding:0 40px;display:grid;grid-template-columns:250px minmax(0,820px);gap:76px;justify-content:center}.sidebar{position:sticky;top:0;align-self:start;max-height:100vh;overflow:auto;padding:44px 8px 30px 0}.eyebrow{font-size:11px;letter-spacing:.17em;color:var(--copper);font-weight:600}.search-label{display:block;font-size:12px;margin:25px 0 10px}.sidebar input{width:100%;border:1px solid var(--line);background:transparent;color:var(--ink);padding:11px 12px;border-radius:3px;font-size:13px}.search-status{font-size:11px;color:var(--muted);line-height:1.6;margin:12px 0 18px}.sidebar nav{display:flex;flex-direction:column}.sidebar nav a{font-size:13px;color:var(--muted);text-decoration:none;padding:10px 12px;border-left:1px solid var(--line);line-height:1.5}.sidebar nav a.active{color:var(--green);border-left:2px solid var(--green);font-weight:600;background:#22736a08}.sidebar-note{font-size:12px;line-height:1.9;color:var(--muted);margin:26px 12px 0 0}.nav-toggle{display:none}main{min-width:0;padding:65px 0 70px}.intro{padding-bottom:40px}h1,h2,h3{font-family:"Noto Serif SC","Songti SC",SimSun,serif;font-weight:500}h1{font-size:clamp(34px,4.2vw,54px);line-height:1.35;letter-spacing:-.035em;margin:22px 0}h2{font-size:27px;line-height:1.5;margin:10px 0 24px}h3{font-size:20px;margin:32px 0 13px}.lead{font-size:17px;line-height:1.95;max-width:670px;color:#455b56}.edition-note{font-size:12px;color:var(--muted);margin-top:28px}article section{padding:39px 0 34px;border-top:1px solid var(--line);scroll-margin-top:24px}.section-number{font-size:11px!important;letter-spacing:.13em;color:var(--copper);margin:0!important}section p,section li,section dd{font-size:15px;line-height:1.95}section p{margin:16px 0}section li{padding-left:5px;margin:11px 0}section ul,section ol{padding-left:23px}.note,.notice{border-left:2px solid var(--copper);padding:9px 0 9px 18px;color:#626d65;font-size:13px!important;line-height:1.95}code{font-family:"SFMono-Regular",Consolas,monospace;font-size:.85em;overflow-wrap:anywhere;background:#182a2a06;padding:2px 4px}.table-scroll{overflow-x:auto;margin:24px 0}table{width:100%;border-collapse:collapse;text-align:left;min-width:490px;font-size:13px;line-height:1.85}th{font-weight:600;color:var(--muted);font-size:11px;letter-spacing:.04em;background:#182a2a03}th,td{border-bottom:1px solid var(--line);padding:14px 15px 14px 0;vertical-align:top}th:first-child,td:first-child{padding-left:10px;min-width:110px}table td:first-child{font-weight:500}.numbered-list{counter-reset:focus;margin:0}.numbered-list>div{display:grid;grid-template-columns:160px 1fr;gap:20px;padding:17px 0;border-bottom:1px solid var(--line)}dt{font-weight:600;font-size:14px;line-height:1.95}dd{margin:0;color:#455b56}.guide-footer{border-top:1px solid var(--line);padding:36px 0 0}.guide-footer h2{font-size:20px}.guide-footer p{font-size:12px;line-height:2;color:var(--muted)}.guide-footer>a{display:inline-block;margin-top:17px;font-size:13px}@media(min-width:1500px){main{padding-top:80px}}@media(max-width:1000px){.reading-layout{grid-template-columns:205px minmax(0,1fr);gap:35px;padding:0 28px}.brand span{display:none}.numbered-list>div{grid-template-columns:130px 1fr}}@media(max-width:700px){.masthead{min-height:70px;padding:18px 20px}.masthead nav{gap:14px;font-size:11px}.masthead nav a:last-child{display:none}.reading-layout{display:block;padding:0 22px}.sidebar{position:relative;max-height:none;padding:0;border-bottom:1px solid var(--line)}.nav-toggle{display:flex;align-items:center;justify-content:space-between;width:100%;border:0;padding:20px 0;background:transparent;color:var(--ink);font-size:13px}.nav-toggle span{font-size:20px;color:var(--green)}.sidebar #guideNav{display:none;padding:4px 0 24px}.sidebar.open #guideNav{display:block}.sidebar nav{display:grid;grid-template-columns:1fr 1fr}.sidebar nav a{padding:9px 8px;font-size:12px}.sidebar-note{display:none}.sidebar .eyebrow{display:none}.search-label{margin-top:8px}main{padding:35px 0 45px}.intro{padding-bottom:26px}h1{font-size:37px}h2{font-size:24px}.lead{font-size:15px}article section{padding:29px 0 23px;scroll-margin-top:18px}.numbered-list>div{display:block}dt{margin-bottom:5px}section p,section li,section dd{font-size:14px}.table-scroll{margin-right:-10px}table{min-width:460px;font-size:12px}.edition-note{font-size:11px}}@media(prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}@media print{.masthead,.sidebar,.skip{display:none}.reading-layout{display:block;padding:0}main{padding:0;max-width:none}article section[hidden]{display:block!important}body{background:white}a{color:inherit}h2{break-after:avoid}table{min-width:0}}
/* 统一品牌标：与桌面客户端「精简轨道」同一几何。 */
.brand-glyph{width:26px;height:26px;vertical-align:-6px;margin-right:9px}