:root{--bg:#f6f8f5;--card:#fff;--ink:#1c2420;--muted:#5f6b63;--line:#dde5de;--accent:#4f936e;--sage:#7fa89a}
@media (prefers-color-scheme:dark){:root{--bg:#111513;--card:#1a201c;--ink:#e7ede8;--muted:#9aa89e;--line:#2b342e;--accent:#7fc49a;--sage:#7fa89a}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 -apple-system,BlinkMacSystemFont,"PingFang TC","Noto Sans TC","Microsoft JhengHei",sans-serif}
a{color:var(--accent)}header,main,footer{max-width:880px;margin:0 auto;padding:0 16px}
header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:18px;padding-bottom:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ink);text-decoration:none;font-size:18px}.brand img{width:36px;height:36px;border-radius:9px}
nav a{margin-left:14px;text-decoration:none;color:var(--muted);font-size:15px}
.hero{padding:36px 0 20px}.hero h1{font-size:clamp(30px,6vw,46px);line-height:1.25;margin:0 0 12px}.hero p{color:var(--muted);font-size:18px;margin:0 0 22px}
.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;padding:12px 22px;border-radius:12px;font-weight:600}
.btn.disabled{background:var(--line);color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin:26px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px}.card h3{margin:0 0 6px;font-size:17px}.card p{margin:0;color:var(--muted);font-size:15px}
h2{font-size:22px;margin:34px 0 10px}.note{background:var(--card);border-left:4px solid var(--sage);padding:14px 16px;border-radius:10px;color:var(--muted);font-size:14px}
article h1{font-size:28px;margin:18px 0 4px}article .en{color:var(--muted);margin:0 0 16px}
dl{margin:0}dt{font-weight:700;margin-top:18px}dd{margin:4px 0 0}
footer{color:var(--muted);font-size:13px;padding-top:30px;padding-bottom:40px;border-top:1px solid var(--line);margin-top:40px}
ul.list{padding-left:20px}.crumb{font-size:14px;color:var(--muted)}