@font-face{font-family:"Orbitron Variable";src:url("./orbitron-latin-wght-normal.woff2") format("woff2-variations");font-weight:400 900;font-style:normal;font-display:swap}
.riqi-wordmark{font-family:"Orbitron Variable","Space Grotesk","Helvetica Neue",sans-serif;font-weight:700;letter-spacing:0.04em;line-height:1;font-size:1em}
:root{color-scheme:light;--bg:#fff;--ink:#24272a;--muted:#5d666c;--line:#e3e7e9;--accent:#087d87;--soft:#eef8f8;--focus:#bd6e13;font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;letter-spacing:0}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-size:16px;line-height:1.8}a{color:var(--accent);text-decoration:none;overflow-wrap:anywhere}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--focus);outline-offset:3px}svg{width:18px;height:18px;flex:none;vertical-align:middle}button,input{font:inherit}button{cursor:pointer}button svg{display:block}img{display:block}.skip{position:absolute;top:-100px;left:16px;z-index:10;background:var(--bg);padding:12px}.skip:focus{top:8px}.site-header{height:72px;padding:0 32px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:20px}.brand{display:flex;align-items:center;gap:12px;font-weight:650;color:var(--ink);font-size:18px;white-space:nowrap}.brand-suffix{color:var(--muted);font-weight:450;font-size:15px;margin-left:6px}.site-header nav{display:flex;gap:24px;font-size:14px}.site-header nav a{min-height:44px;display:flex;gap:5px;align-items:center;color:var(--muted)}.layout{max-width:1470px;margin:auto;display:grid;grid-template-columns:260px minmax(0,790px) 170px;gap:36px;padding:32px}.sidebar{min-width:0;padding-right:20px;border-right:1px solid var(--line)}.search{margin-bottom:24px}.search label{font-size:13px;color:var(--muted);display:block;margin-bottom:7px}.search-control{display:flex;align-items:center;min-height:44px;border:1px solid #b7c2c7;border-radius:6px;padding-left:10px;gap:6px}.search-control input{min-width:0;width:100%;border:0;background:transparent;font-size:14px;padding:8px 0;color:var(--ink)}.search-control button{border:0;background:transparent;padding:12px;color:var(--muted);width:44px;height:44px}.nav-group{margin-bottom:22px}.nav-group h2{font-size:13px;color:var(--ink);margin:0 0 6px;font-weight:650}.nav-group a{display:block;font-size:13px;padding:7px 10px;line-height:1.6;color:var(--muted);border-left:2px solid transparent}.nav-group a[aria-current]{border-color:var(--accent);background:var(--soft);color:var(--accent);font-weight:600}.breadcrumb{font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px}.article-heading{margin-bottom:32px}.article-heading h1{font-size:32px;line-height:1.4;letter-spacing:0;margin:0 0 14px;font-weight:700;overflow-wrap:anywhere}.lead{font-size:17px;color:var(--muted);margin:0;max-width:680px}main{min-width:0;outline:none;padding:0 8px}article section{scroll-margin-top:20px;margin-top:34px}h2{font-size:21px;line-height:1.5;margin:0 0 14px;letter-spacing:0}h3{font-size:17px;margin:26px 0 10px}article p{margin:12px 0}ol{padding-left:24px}ol li{padding-left:6px;margin:14px 0}ol li::marker{font-weight:650;color:var(--accent)}.product-link{display:inline-flex;align-items:center;gap:6px;border-bottom:1px solid var(--accent);min-height:44px;margin:6px 0}.related{padding-left:20px}.related li{margin:8px 0}.pagination{border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:44px;padding-top:20px}.pagination a{display:flex;align-items:center;gap:10px;min-height:64px;font-size:14px;line-height:1.6}.pagination a:last-child{justify-content:flex-end}.pagination small{display:block;color:var(--muted);font-size:12px;margin-bottom:4px}.article-footer{margin-top:40px;border-top:1px solid var(--line);padding:20px 0 8px;display:flex;flex-wrap:wrap;gap:18px;font-size:12px;color:var(--muted)}.page-toc{padding-top:45px;align-self:start;position:sticky;top:24px}.page-toc nav a,.mobile-toc nav a{display:block;font-size:13px;min-height:32px;color:var(--muted);padding:4px 0}.page-toc strong,.mobile-toc strong{font-size:12px;color:var(--muted);display:block;margin-bottom:10px}.catalog-group{margin-top:34px}.catalog-group ul{list-style:none;padding:0}.catalog-group li{padding:14px 0;border-bottom:1px solid var(--line)}.catalog-group li a{font-size:16px;font-weight:550}.catalog-group li p{font-size:14px;color:var(--muted);margin:4px 0 0}.start-links{display:flex;flex-wrap:wrap;gap:24px;padding-bottom:22px;border-bottom:1px solid var(--line)}.start-links a{min-height:44px;display:flex;align-items:center;gap:8px}.search-results{margin:12px 0 24px}.search-results[hidden]{display:none}.search-results p{font-size:13px;color:var(--muted)}.search-results a{display:block;font-size:14px;padding:12px 0;border-bottom:1px solid var(--line)}.search-results small{display:block;color:var(--muted);font-size:12px;margin-top:4px;line-height:1.6}.mobile-nav,.mobile-toc{display:none}summary{cursor:pointer;min-height:44px;display:flex;align-items:center;font-size:14px}summary::after{content:"+";margin-left:auto;font-size:19px;color:var(--muted)}details[open]>summary::after{content:"-"}
@media(max-width:1120px){.layout{grid-template-columns:230px minmax(0,1fr);gap:28px;padding:28px}.page-toc{display:none}.mobile-toc{display:block;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:22px 0}.mobile-toc nav{padding:0 0 16px}.mobile-toc nav strong{display:none}}
@media(max-width:720px){.site-header{height:64px;padding:0 20px;gap:12px}.site-header nav{gap:14px;font-size:12px}.brand{font-size:16px;gap:8px}.brand-suffix{display:none}.site-header nav svg{display:none}.layout{display:block;padding:20px}.sidebar{border:0;padding:0}.search{margin-bottom:12px}.search label{font-size:12px}.desktop-nav{display:none}.mobile-nav{display:block;border-bottom:1px solid var(--line);margin-bottom:24px}.mobile-nav nav{max-height:55vh;overflow:auto;padding:12px 0}.mobile-nav .nav-group a{min-height:44px;display:flex;align-items:center;font-size:14px}.article-heading h1{font-size:26px;line-height:1.45}.article-heading{margin-bottom:20px}.lead{font-size:16px}main{padding:0}.breadcrumb{margin:18px 0}article section{margin-top:28px}h2{font-size:20px}body{line-height:1.9}.pagination{gap:14px}.pagination a{font-size:13px}.article-footer{margin-top:30px}.start-links{gap:12px}.catalog-group{margin-top:28px}.search-results a{min-height:44px}}
@media(prefers-color-scheme:dark){:root{color-scheme:dark;--bg:#181b1d;--ink:#eef0f1;--muted:#b4bec2;--line:#353c40;--accent:#72c9c8;--soft:#213336;--focus:#e4b36d}.search-control{border-color:#566165}}
@media print{.sidebar,.site-header,.page-toc,.mobile-toc,.pagination{display:none}.layout{display:block;padding:0}body{background:#fff;color:#000}a{color:#000}.article-footer{margin-top:16px}}
.worked-example{margin:18px 0;max-width:100%}.worked-example figcaption{font-size:13px;color:var(--muted);margin-bottom:8px}.worked-example pre{margin:0;padding:16px;border:1px solid var(--line);border-radius:6px;background:var(--soft);white-space:pre-wrap;overflow-wrap:anywhere}.worked-example code{font:14px/1.75 ui-monospace,SFMono-Regular,Consolas,monospace;color:var(--ink)}.reference-table{max-width:100%;overflow-x:auto;overscroll-behavior-inline:contain;margin:18px 0}.reference-table:focus-visible{outline:2px solid var(--focus);outline-offset:3px}.reference-table table{width:100%;min-width:460px;border-collapse:collapse;font-size:14px;line-height:1.75}.reference-table th,.reference-table td{text-align:left;vertical-align:top;padding:12px;border-bottom:1px solid var(--line);overflow-wrap:anywhere}.reference-table th{background:var(--soft);font-weight:600}.reference-table th:first-child,.reference-table td:first-child{width:25%}
@media print{.reference-table{overflow:visible}.reference-table table{min-width:0}.worked-example pre{background:#fff;color:#000;break-inside:avoid}}