/* 服務頁與後台共用的基本樣式 */
:root {
  --sans: "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --fg: #1a1d20; --muted: #6c757d; --border: #e5e7eb; --primary: #1f3a5f; --bg: #fafbfc; --danger: #b42318; --ok: #067647;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: var(--sans); color: var(--fg); background: var(--bg); line-height: 1.65; }
a { color: var(--primary); }
code { background: #eef1f5; padding: 1px 6px; border-radius: 4px; font-size: 0.92em; }
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; max-width: 860px; margin: 0 auto; padding: 18px 20px; }
.top nav { display: flex; gap: 16px; font-size: 14px; }
.top nav a { color: var(--muted); text-decoration: none; }
.brand { font-weight: 700; color: var(--fg); text-decoration: none; font-size: 18px; }
.doc { max-width: 860px; margin: 0 auto; padding: 8px 20px 40px; }
.doc h1 { font-size: 28px; line-height: 1.3; margin: 12px 0 16px; }
.doc h2 { font-size: 19px; margin: 28px 0 8px; }
.lead p { font-size: 17px; color: #334155; }
.bottom { max-width: 860px; margin: 0 auto; padding: 24px 20px 40px; color: var(--muted); font-size: 13px; border-top: 1px solid var(--border); }
.bottom p { margin: 4px 0; }