:root { --bg:#fbf8f5; --fg:#1f1a17; --muted:#6e645d; --accent:#c8323c; --card:#ffffff; --line:#eadfd6; }
@media (prefers-color-scheme: dark) { :root { --bg:#141110; --fg:#f3ede8; --muted:#a89d95; --accent:#ff5a63; --card:#1e1a18; --line:#2f2825; } }
* { box-sizing:border-box; }
body { margin:0; background:var(--bg); color:var(--fg); font:17px/1.6 -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Sans", "PingFang TC", sans-serif; }
main { max-width:680px; margin:0 auto; padding:48px 16px 64px; }
h1 { font-size:2.2rem; line-height:1.15; margin:0 0 12px; letter-spacing:-0.02em; }
h2 { font-size:1.25rem; margin:36px 0 8px; }
p, li { color:var(--fg); }
.muted { color:var(--muted); }
.knot { color:var(--accent); }
a { color:var(--accent); }
.card { background:var(--card); border:1px solid var(--line); border-radius:16px; padding:20px; margin:20px 0; }
nav { display:flex; gap:18px; font-size:0.95rem; margin-bottom:40px; }
nav a { text-decoration:none; }
footer { margin-top:56px; font-size:0.85rem; color:var(--muted); }
hr { border:0; border-top:1px solid var(--line); margin:40px 0; }