@import "https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600;700&family=Noto+Serif+SC:wght@600;700;900&display=swap";:root{--paper:#f3efe5;--paper-deep:#e8e0d0;--ink:#1f2421;--muted:#696c64;--accent:#c63e2e;--accent-soft:#ead0c8;--rule:#cfc7b6;--white:#fffdf7;--sans:"Noto Sans SC", "Microsoft YaHei", sans-serif;--serif:"Noto Serif SC", "Songti SC", serif}*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--paper)}body{color:var(--ink);background:radial-gradient(circle at 12% 0%, #c63e2e14, transparent 26rem), linear-gradient(#1f242105 1px, transparent 1px), var(--paper);font-family:var(--sans);background-size:auto,100% 28px,auto;min-height:100vh;margin:0}a{color:inherit}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}svg{fill:none;stroke:currentColor;stroke-width:1.8px;stroke-linecap:round;stroke-linejoin:round}.sr-only,.skip-link:not(:focus){clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.skip-link{z-index:50;background:var(--ink);color:#fff;padding:10px 14px;position:fixed;inset:12px auto auto 12px}.site-header,.reader-header,.site-footer{width:min(1120px,100% - 32px);margin-inline:auto}.site-header{border-bottom:1px solid var(--rule);justify-content:space-between;align-items:center;min-height:88px;display:flex}.brand{align-items:center;gap:10px;text-decoration:none;display:inline-flex}.brand-mark{background:var(--accent);width:38px;height:38px;color:var(--white);font:700 20px var(--serif);border-radius:50% 50% 44% 56%;place-items:center;display:grid;transform:rotate(-4deg)}.brand-mark-glyph{display:block;transform:rotate(4deg)}.brand strong,.brand small{display:block}.brand strong{font:700 19px var(--serif);letter-spacing:.16em}.brand small{color:var(--muted);letter-spacing:.1em;text-transform:uppercase;margin-top:1px;font-size:9px}.count{color:var(--muted);font-size:12px}.count 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var(--rule);width:44px;height:44px;color:var(--ink);cursor:pointer;background:0 0;border-radius:50%;place-items:center;padding:0;transition:color .2s,border-color .2s,background .2s;display:grid}.to-top:hover,.to-top:focus-visible{border-color:var(--ink);background:var(--white);color:var(--accent)}.to-top:focus-visible{outline:3px solid var(--accent-soft);outline-offset:2px}.reader-shell{width:min(760px,100% - 32px);margin:0 auto;padding:clamp(54px,9vw,110px) 0 80px}.article-heading{border-bottom:1px solid var(--ink);padding-bottom:38px}.article-heading h1{font-size:clamp(36px,7vw,68px)}.lead{color:var(--muted);margin:24px 0 20px;font-size:clamp(16px,2.5vw,20px);line-height:1.75}.freshness-note{border-left:4px solid var(--accent);background:var(--accent-soft);gap:7px;margin:28px 0;padding:18px 20px;font-size:13px;line-height:1.6;display:grid}.prose{padding:28px 0;font-size:16px;line-height:1.95}.prose h2{font:700 27px/1.4 var(--serif);margin:2.4em 0 .7em}.prose h3{font:700 20px/1.4 var(--serif);margin:2em 0 .6em}.prose p,.prose ul,.prose ol,.prose table,.prose pre,.prose blockquote{margin:1.2em 0}.prose ul,.prose ol{padding-left:1.35em}.prose li{margin:.45em 0}.prose strong{color:#111}.prose blockquote{border-left:3px solid var(--accent);color:var(--muted);background:#ffffff5c;margin-inline:0;padding:12px 20px}.prose code{background:var(--paper-deep);padding:.12em .35em;font-size:.9em}.prose pre{background:var(--ink);color:var(--white);padding:18px;line-height:1.8;overflow-x:auto}.prose pre code{color:inherit;font-size:inherit;background:0 0;padding:0}.prose table{border-collapse:collapse;width:100%;font-size:14px}.prose th,.prose td{border-bottom:1px solid var(--rule);text-align:left;vertical-align:top;padding:10px 8px}.prose th{font-weight:700}.prose a{-webkit-text-decoration-color:var(--accent);text-decoration-color:var(--accent);text-underline-offset:3px}.source-panel{border-top:1px solid var(--ink);justify-content:space-between;align-items:center;gap:18px;margin-top:20px;padding:22px 0;display:flex}.source-panel div span,.source-panel div strong{display:block}.source-panel div span{color:var(--muted);margin-bottom:5px;font-size:11px}.source-panel div strong{overflow-wrap:anywhere;font-size:13px}.source-panel a{min-height:44px;color:var(--accent);flex:none;align-items:center;gap:7px;font-weight:700;text-decoration:none;display:inline-flex}@keyframes rise{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}@media (width<=680px){.site-header{min-height:76px}.finder{margin-inline:-16px;padding-inline:16px}.knowledge-grid{grid-template-columns:1fr}.knowledge-card:nth-child(odd){border-right:0}.knowledge-card>a{min-height:270px;padding:26px 3px}.source-panel{flex-direction:column;align-items:flex-start}.prose table{white-space:nowrap;display:block;overflow-x:auto}}@media 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