:root{
  --bg:#0a0a0a; --panel:#111111; --line:#1e1e1e; --line-2:#2a2a2a;
  --text:#f4f2ee; --muted:#9a9791; --dim:#807d76; --cream:#f2ead8;
  --amber:#d9a441; --ease:cubic-bezier(.22,1,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{background:#080808}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased}
:focus-visible{outline:2px solid var(--cream);outline-offset:3px;border-radius:4px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:fixed;left:0;right:0;top:-100px;height:64px;display:flex;align-items:center;justify-content:center;gap:10px;background:var(--cream);color:#111;font-weight:600;font-size:15px;text-decoration:none;z-index:100;transition:top .2s}
.skip:focus-visible{top:0;outline:none}
a{color:var(--cream);text-decoration:underline;text-underline-offset:3px}
a:hover{color:#fff}
.wrap{max-width:760px;margin:0 auto;padding:0 24px}
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:rgba(10,10,10,.8);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;justify-content:space-between;align-items:center;height:64px;max-width:1160px}
.nav a{text-decoration:none;color:var(--text)}
.nav .home{font-size:14px;color:var(--muted)}
.nav .home:hover{color:var(--text)}
.logo{display:inline-flex;align-items:center;gap:9px;font-weight:600;letter-spacing:-.01em;font-size:16px}
.logo svg{width:20px;height:20px;fill:#fff;filter:drop-shadow(0 0 6px rgba(242,234,216,.55))}
main{padding:64px 0 96px}
.eyebrow{font-family:'JetBrains Mono',monospace;font-size:11.5px;letter-spacing:.22em;color:var(--dim);margin-bottom:16px}
h1{font-size:clamp(2rem,4.5vw,2.8rem);letter-spacing:-.03em;line-height:1.1;font-weight:600}
.meta{margin-top:14px;color:var(--muted);font-size:14px}
.lede{margin-top:22px;font-size:1.08rem;color:#cfcbc3}
h2{font-size:1.35rem;letter-spacing:-.02em;font-weight:600;margin:48px 0 14px;padding-top:24px;border-top:1px solid var(--line)}
h3{font-size:1.05rem;font-weight:600;margin:26px 0 8px}
p,li{color:#d9d5cd;font-size:15.5px}
p+p{margin-top:12px}
ul,ol{margin:12px 0 0 22px;display:flex;flex-direction:column;gap:8px}
table{width:100%;border-collapse:collapse;margin-top:14px;font-size:14.5px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top;color:#d9d5cd}
th{color:var(--muted);font-weight:500;font-size:13px;letter-spacing:.04em}
.table-wrap{overflow-x:auto}
.callout{margin-top:18px;padding:16px 20px;border-radius:12px;background:var(--panel);border:1px solid var(--line-2);font-size:14.5px;color:#cfcbc3}
.callout b{color:var(--text)}
.toc{margin-top:28px;padding:18px 22px;border:1px solid var(--line);border-radius:12px;background:var(--panel)}
.toc b{display:block;font-size:13px;letter-spacing:.12em;color:var(--dim);font-family:'JetBrains Mono',monospace;margin-bottom:10px}
.toc ol{margin:0 0 0 18px;gap:5px}
.toc a{text-decoration:none;color:#cfcbc3}
.toc a:hover{color:var(--text);text-decoration:underline}
footer{border-top:1px solid var(--line);padding:36px 0;color:var(--muted);font-size:13.5px}
footer .wrap{max-width:1160px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
footer nav{display:flex;gap:18px;flex-wrap:wrap}
footer a{color:var(--muted);text-decoration:none}
footer a:hover{color:var(--text);text-decoration:underline}
footer address{font-style:normal;line-height:1.5}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

@media(max-width:560px){.nav .home{display:none}}
.govern{margin-top:18px;padding:14px 18px;border-radius:10px;background:var(--panel);border:1px solid var(--line-2);font-size:13.5px;color:var(--muted)}

/* ===== CJK ===== */
html[lang^="zh"] body{font-family:'Inter','PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans CJK SC',system-ui,sans-serif;line-height:1.85}
html[lang^="zh"] h1{letter-spacing:0;line-height:1.3}
html[lang^="zh"] .eyebrow{letter-spacing:.1em;font-family:inherit}