:root{--bg:#111820;--panel:#18232d;--panel2:#202e3a;--text:#edf7ee;--muted:#a9bbb4;--line:#31444b;--green:#7bea8b;--yellow:#ffe66d;--red:#ff7b72;--blue:#79c0ff;--shadow:0 18px 48px #0005;color-scheme:dark}html[data-theme="light"]{--bg:#eef5ed;--panel:#fff;--panel2:#e4eee4;--text:#17251c;--muted:#52675b;--line:#bfd0c3;--green:#15883e;--yellow:#956b00;--red:#b42318;--blue:#0969da;--shadow:0 18px 48px #264b3020;color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 85% -10%,#285542 0,transparent 32rem),var(--bg);color:var(--text);font:16px/1.65 system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif}.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:24px;padding:12px 24px;background:color-mix(in srgb,var(--bg) 88%,transparent);border-bottom:1px solid 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.inline-media-link{display:inline-flex;align-items:center;vertical-align:middle;margin:0 .25em}.inline-media{display:inline-block;width:auto;max-width:128px;max-height:80px;margin:0;vertical-align:middle}.inline-media.lazy-media:not([src]){min-width:24px;min-height:24px}.chapter-menu{position:sticky;top:61px;z-index:14;display:flex;align-items:center;gap:12px;margin:0 0 24px;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:color-mix(in srgb,var(--panel) 94%,transparent);box-shadow:0 10px 30px #0004;backdrop-filter:blur(16px)}.chapter-menu-label{white-space:nowrap;color:var(--yellow)}.top-chapter-toggle{display:none}.chapter-menu-icon{width:18px;height:12px;border-top:2px solid currentColor;border-bottom:2px solid currentColor;background:linear-gradient(currentColor,currentColor) center/100% 2px no-repeat}.chapter-menu .section-toc{flex:1;padding:0}.back-to-top{position:fixed;right:18px;bottom:18px;z-index:18;min-width:52px;min-height:44px;opacity:0;transform:translateY(12px);pointer-events:none;box-shadow:var(--shadow);transition:opacity .18s ease,transform .18s ease}.back-to-top.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
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@media(max-width:900px){.chapter-menu{top:109px}}
@media(max-width:560px){.topbar{align-items:center;flex-wrap:nowrap;padding:8px 10px}.brand{display:none}.top-actions{display:grid;grid-template-columns:auto minmax(0,1fr) auto;width:100%;margin:0;gap:6px}.top-chapter-toggle{display:flex;align-items:center;gap:6px;min-height:40px;padding:7px 9px}.search-box{min-width:0;padding:4px 7px}.search-box span{display:none}.search-box input{min-width:0;width:100%;padding:4px 2px;font-size:16px}#theme-toggle{min-height:40px;padding:7px 9px}.chapter-menu{position:static;width:0;height:0;margin:0;padding:0;border:0;background:transparent;box-shadow:none;backdrop-filter:none}.chapter-menu-label{display:none}.chapter-menu .section-toc{position:fixed;top:58px;left:8px;z-index:19;display:flex;flex-direction:column;align-items:stretch;width:min(82vw,320px);max-height:calc(100vh - 74px);padding:10px;overflow:auto;border:1px solid var(--line);border-radius:12px;background:var(--panel);box-shadow:var(--shadow);opacity:0;transform:translateX(calc(-100% - 24px));pointer-events:none;transition:transform .2s ease,opacity .2s ease}.chapter-menu .section-toc a{width:100%;white-space:normal}.chapter-menu.is-open .section-toc{opacity:1;transform:translateX(0);pointer-events:auto}.section-title{top:58px}.back-to-top{right:10px;bottom:10px;min-width:48px;min-height:40px;padding:7px 9px}.chinese-match{padding:14px}.chinese-match-heading{align-items:flex-start;flex-direction:column;gap:2px}.spoiler{display:inline;box-decoration-break:clone;-webkit-box-decoration-break:clone}.guide-table{min-width:480px}.guide-table th,.guide-table td{padding:8px}.reference-stack{padding:15px}.bb_ul,.subSectionDesc ul,.chinese-match ul{padding-inline-start:1.1rem}}