:root{--bg:#fbfaf7;--fg:#1f2328;--muted:#5b616b;--line:#e3e0d8;--accent:#2f6f5e;--card:#ffffff}
@media (prefers-color-scheme:dark){:root{--bg:#141517;--fg:#e8e6e1;--muted:#a3a7ad;--line:#2c2e33;--accent:#7cc3ad;--card:#1b1d20}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.75 -apple-system,BlinkMacSystemFont,"PingFang TC","Noto Sans TC","Microsoft JhengHei",sans-serif}
main{max-width:680px;margin:0 auto;padding:28px 20px 56px}
header.app{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:8px}
header.app .name{font-size:1.05rem;font-weight:700;letter-spacing:.02em}
header.app nav{margin-left:auto;font-size:.92rem}
header.app nav a{margin-left:14px}
h1{font-size:1.6rem;line-height:1.35;margin:22px 0 4px}
h2{font-size:1.15rem;margin:30px 0 6px}
h3{font-size:1rem;margin:20px 0 4px}
p,li{margin:6px 0}
ul{padding-left:1.25em}
a{color:var(--accent);text-underline-offset:3px}
a:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:2px}
.meta{color:var(--muted);font-size:.9rem;margin:0 0 14px}
.summary{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:16px 0}
.note{color:var(--muted);font-size:.92rem}
details{border-top:1px solid var(--line);padding:10px 0}
details:last-of-type{border-bottom:1px solid var(--line)}
summary{cursor:pointer;font-weight:600;list-style-position:outside}
summary::-webkit-details-marker{color:var(--muted)}
footer{margin-top:40px;padding-top:14px;border-top:1px solid var(--line);color:var(--muted);font-size:.85rem}
code{font-size:.9em}