:root {
  --bg: #f7f8fa;
  --card: #ffffff;
  --text: #1c2430;
  --muted: #5b6573;
  --line: #e3e6eb;
  --primary: #208aef;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161c;
    --card: #1b2129;
    --text: #e8ecf1;
    --muted: #9aa4b1;
    --line: #2b333d;
    --primary: #5aa9f5;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.75 -apple-system, BlinkMacSystemFont, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
}
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
header.top { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }

header.top a { color: var(--text); text-decoration: none; font-weight: 700; font-size: 20px; }
h1 { font-size: 28px; line-height: 1.35; margin: 0 0 8px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
h3 { font-size: 17px; margin: 20px 0 4px; }
p, li { color: var(--text); }
.muted { color: var(--muted); font-size: 15px; }
a { color: var(--primary); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px; margin: 16px 0; }
.plans { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.plans .card { margin: 0; }
.price { font-size: 24px; font-weight: 800; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 8px 6px; border-bottom: 1px solid var(--line); }
ol, ul { padding-left: 1.4em; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }
footer a { margin-right: 16px; }