:root{
  --ink:#1C1613; --muted:#5f574f; --line:#e7e0da; --accent:#A4122B; --accent-ink:#82091F;
  --wash:#f8ecee; --ground:#faf8f7;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  font-family:ui-sans-serif,-apple-system,"SF Pro Text","Segoe UI",system-ui,"PingFang HK","Noto Sans HK",sans-serif;
  color:var(--ink); background:var(--ground); line-height:1.6;
  max-width:820px; margin:0 auto; padding:34px 22px 90px; font-size:16px;
  -webkit-font-smoothing:antialiased;
}
.backhome{display:inline-flex;gap:6px;align-items:center;text-decoration:none;color:var(--accent-ink);font-weight:600;font-size:13.5px;margin-bottom:22px}
h1,h2,h3,h4{line-height:1.25;letter-spacing:-.01em;text-wrap:balance;margin:1.8em 0 .5em}
h1{font-size:29px;margin-top:.2em;border-bottom:3px solid var(--accent);padding-bottom:.35em}
h2{font-size:22px;margin-top:1.6em;border-bottom:1px solid var(--line);padding-bottom:.3em}
h3{font-size:17.5px} h4{font-size:15px;color:var(--muted)}
a{color:var(--accent-ink)}
p,li{max-width:70ch}
code{background:#f1ebe7;padding:.12em .4em;border-radius:5px;font-size:.9em;font-family:ui-monospace,"SF Mono",Menlo,monospace}
pre{background:#241c1a;color:#f3ede9;padding:15px 17px;border-radius:12px;overflow-x:auto;font-size:13.5px}
pre code{background:none;padding:0;color:inherit}
blockquote{margin:1.1em 0;padding:.5em 1.1em;border-left:4px solid var(--accent);background:#fff;border-radius:0 10px 10px 0;color:var(--muted)}
blockquote strong{color:var(--ink)}
hr{border:0;border-top:1px solid var(--line);margin:2em 0}
table{border-collapse:collapse;width:100%;font-size:14px;margin:1.1em 0;display:block;overflow-x:auto}
th,td{border:1px solid var(--line);padding:8px 11px;text-align:left;vertical-align:top}
th{background:var(--wash);font-weight:700}
tr:nth-child(even) td{background:#fff}
strong{font-weight:650}
ul,ol{padding-left:1.3em}
li{margin:.2em 0}