:root {
  --bg: #faf9f5; --surface: #ffffff; --surface-alt: #f1f3ee;
  --text: #1b211d; --text-secondary: #5a645d; --border: #e2e6df;
  --accent: #1f7a54; --accent-soft: #e4f2ea;
  --warn-bg: #fbf1de; --warn-text: #7c5a16; --warn-border: #efdba8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11150f; --surface: #181d16; --surface-alt: #1e241b;
    --text: #edefe9; --text-secondary: #a7b0a4; --border: #2b322a;
    --accent: #4fc28d; --accent-soft: #1e3327;
    --warn-bg: #2c220e; --warn-text: #e8c687; --warn-border: #4a3a1a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  line-height: 1.75; -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.topbar { background: var(--surface); border-bottom: 1px solid var(--border); }
.topbar-inner {
  max-width: 760px; margin: 0 auto; padding: 16px 16px;
  display: flex; align-items: center; gap: 12px;
}
.mark {
  width: 34px; height: 34px; border-radius: 9px; background: var(--accent); color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 700; flex-shrink: 0;
}
.brand { font-weight: 700; font-size: 17px; color: var(--text); text-decoration: none; }
.topbar nav { margin-left: auto; display: flex; gap: 16px; font-size: 14px; }
.topbar nav a { color: var(--text-secondary); text-decoration: none; }
.topbar nav a:hover { color: var(--accent); }

main { max-width: 760px; margin: 0 auto; padding: 24px 16px 64px; }
h1 { font-size: 26px; line-height: 1.35; margin: 8px 0 6px; }
h2 { font-size: 19px; margin: 32px 0 10px; padding-top: 24px; border-top: 1px solid var(--border); }
h2:first-of-type { border-top: 0; padding-top: 0; }
p, li { font-size: 15.5px; }
ul { padding-left: 20px; }
li { margin: 6px 0; }
.meta { color: var(--text-secondary); font-size: 13px; }

.notice {
  background: var(--warn-bg); color: var(--warn-text); border: 1px solid var(--warn-border);
  border-radius: 12px; padding: 12px 16px; font-size: 14px; margin: 16px 0;
}
.notice p { margin: 0 0 8px; font-size: 14px; }
.notice p:last-child { margin: 0; }
.callout {
  background: var(--surface-alt); border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0; padding: 10px 16px; font-size: 14px;
  color: var(--text-secondary); margin: 14px 0;
}
.table-scroll { overflow-x: auto; margin: 8px 0 16px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 520px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--text-secondary); font-weight: 500; font-size: 13px; }

.hero { padding: 32px 0 8px; }
.hero p.lead { font-size: 18px; color: var(--text-secondary); margin: 8px 0 0; }
.cards { display: grid; gap: 12px; margin: 24px 0; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 16px 18px; }
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; font-size: 14px; color: var(--text-secondary); }
.btn {
  display: inline-block; background: var(--accent); color: #fff; border-radius: 999px;
  padding: 10px 22px; text-decoration: none; font-weight: 500; margin-top: 16px;
}
.btn[aria-disabled="true"] { opacity: .55; pointer-events: none; }

footer { max-width: 760px; margin: 0 auto; padding: 0 16px 48px; color: var(--text-secondary); font-size: 13px; }
footer a { color: var(--text-secondary); }