:root{color-scheme:light;--forest:#112e2a;--forest-2:#1b443c;--ink:#18302b;--muted:#687773;--line:#d8d2c4;--paper:#f4efe5;--paper-2:#fbf8f1;--gold:#b89a62}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.85 "Noto Serif SC","Songti SC","STSong","Microsoft YaHei",serif}
a{color:var(--forest-2);text-underline-offset:.22em}a:hover{color:#8a6e3d}header,main,footer{width:min(1040px,calc(100% - 40px));margin:auto}
.site-header{min-height:104px;display:flex;align-items:center;justify-content:space-between;gap:28px;border-bottom:1px solid rgba(24,48,43,.18)}
.brand{display:inline-flex;align-items:center;text-decoration:none}.brand img{display:block;width:min(260px,42vw);max-height:58px;object-fit:contain;object-position:left center}.brand-fallback{display:none}
nav{display:flex;gap:28px;font:14px/1.4 system-ui,-apple-system,"Microsoft YaHei",sans-serif;letter-spacing:.08em}nav a{text-decoration:none;color:var(--ink)}
main{padding:80px 0 100px}article{max-width:820px;margin:auto;padding:64px clamp(22px,6vw,72px);background:var(--paper-2);border:1px solid rgba(24,48,43,.12);box-shadow:0 24px 80px rgba(27,43,37,.08)}
article h1{max-width:15em;margin:.1em 0 1em;font-size:clamp(34px,5vw,58px);line-height:1.22;font-weight:500;letter-spacing:-.035em}
article h2{margin-top:2.4em;padding-top:1.3em;border-top:1px solid var(--line);font-size:clamp(24px,3.5vw,34px);line-height:1.35;font-weight:500}article h3{margin-top:1.8em;font-size:21px}article p{margin:1.1em 0}article li{margin:.55em 0}
blockquote{margin:2em 0;padding:20px 24px;background:#e8ece4;border-left:3px solid var(--gold);color:#29433d}dl{display:grid;grid-template-columns:minmax(120px,.7fr) 2fr;border-top:1px solid var(--line)}dt,dd{margin:0;padding:13px 0;border-bottom:1px solid var(--line)}dt{color:var(--muted)}strong{font-weight:650}
code,pre{background:#e8e3d8;border-radius:4px}code{padding:.12em .35em}pre{padding:16px;overflow:auto}.regional-disclosure{font-weight:600}
.preview{position:sticky;top:0;z-index:20;padding:10px 16px;background:#7a2f16;color:white;text-align:center;font:700 14px/1.5 system-ui,-apple-system,"Microsoft YaHei",sans-serif}.preview.ready{background:var(--forest)}
footer{display:flex;justify-content:space-between;gap:32px;padding:34px 0 54px;border-top:1px solid rgba(24,48,43,.18);color:var(--muted);font:13px/1.7 system-ui,-apple-system,"Microsoft YaHei",sans-serif}footer strong{color:var(--ink)}
@media(max-width:700px){header,main,footer{width:min(100% - 28px,1040px)}.site-header{min-height:84px}.site-header nav{display:none}.brand img{width:190px}main{padding:28px 0 60px}article{padding:38px 20px}article h1{font-size:34px}dl{grid-template-columns:1fr}dt{padding-bottom:0;border-bottom:0}dd{padding-top:4px}footer{flex-direction:column;gap:8px}}