:root{--fg:#1f2328;--muted:#59636e;--bg:#fff;--line:#d1d9e0;--accent:#0969da;--code:#f6f8fa}
@media (prefers-color-scheme:dark){:root{--fg:#e6edf3;--muted:#9198a1;--bg:#0d1117;--line:#30363d;--accent:#4493f8;--code:#151b23}}
*{box-sizing:border-box}body{margin:0;font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--fg);background:var(--bg)}
header.top{position:sticky;top:0;background:var(--bg);border-bottom:1px solid var(--line);padding:.6rem 1.2rem;display:flex;gap:1.2rem;flex-wrap:wrap;align-items:center;z-index:2}
header.top b{margin-right:.5rem}header.top a{color:var(--fg);text-decoration:none;font-size:.95rem}header.top a:hover{color:var(--accent)}
.ver{margin-left:auto;font-size:.8rem;color:var(--muted)}
main{max-width:960px;margin:0 auto;padding:1.5rem 1.2rem 4rem}
a{color:var(--accent)}pre,code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.88em}
code{background:var(--code);padding:.1em .35em;border-radius:4px}pre{background:var(--code);padding:1rem;border-radius:8px;overflow:auto}pre code{background:none;padding:0}
table{border-collapse:collapse;display:block;overflow:auto;margin:1rem 0}th,td{border:1px solid var(--line);padding:.4rem .7rem;text-align:left;vertical-align:top}
h1,h2,h3{line-height:1.3;margin-top:2rem}h1{border-bottom:1px solid var(--line);padding-bottom:.4rem}blockquote{margin:0;padding-left:1rem;border-left:4px solid var(--line);color:var(--muted)}
.banner{border:1px solid var(--line);border-radius:8px;padding:.8rem 1rem;margin:1rem 0;display:flex;gap:1rem;flex-wrap:wrap}
.banner a{font-weight:600}
nav#TOC{border:1px solid var(--line);border-radius:8px;padding:.5rem 1rem;margin:1rem 0;font-size:.92rem}nav#TOC ul{padding-left:1.2rem}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:.85rem;padding:1.2rem;text-align:center}
img{max-width:100%}