:root {
  --primary: #0b5d8a;
  --primary-dark: #084a6e;
  --accent: #1e88c7;
  --text: #1f2933;
  --muted: #5f6b76;
  --bg: #ffffff;
  --bg-soft: #f4f8fb;
  --border: #d9e2ea;
  --radius: 10px;
  --max: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang HK", "Noto Sans TC", Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
}

a { color: var(--primary); text-decoration: none; }
a:hover, a:focus { text-decoration: underline; }

header.site-header {
  background: var(--primary);
  color: #fff;
  padding: 18px 20px;
}
header.site-header .wrap {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
header.site-header h1 {
  font-size: 1.15rem;
  margin: 0;
  letter-spacing: 0.3px;
}
header.site-header h1 span { opacity: 0.85; font-weight: 400; }

nav.site-nav {
  background: var(--primary-dark);
}
nav.site-nav .wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
nav.site-nav a {
  color: #e8f2f9;
  padding: 12px 14px;
  display: inline-block;
  font-size: 0.95rem;
  border-bottom: 3px solid transparent;
}
nav.site-nav a:hover,
nav.site-nav a.active {
  background: rgba(255,255,255,0.08);
  border-bottom-color: var(--accent);
  text-decoration: none;
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 36px 20px 60px;
}

h2 { font-size: 1.6rem; margin-top: 0; color: var(--primary-dark); }
h3 { font-size: 1.2rem; margin-top: 32px; color: var(--primary-dark); }
h4 { font-size: 1.05rem; margin-bottom: 6px; }

p, li { color: var(--text); }
.lead { font-size: 1.08rem; color: var(--muted); }

section.card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin: 22px 0;
}

ul, ol { padding-left: 22px; }
li { margin-bottom: 6px; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.95rem;
}
th, td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}
th { background: var(--bg-soft); }

.notice {
  border-left: 4px solid var(--accent);
  background: var(--bg-soft);
  padding: 14px 18px;
  border-radius: 6px;
  margin: 20px 0;
  color: var(--muted);
}

footer.site-footer {
  background: #0f2533;
  color: #c9d6df;
  padding: 30px 20px;
  font-size: 0.9rem;
}
footer.site-footer .wrap {
  max-width: var(--max);
  margin: 0 auto;
}
footer.site-footer a { color: #8ec7e8; }
footer.site-footer p { margin: 4px 0; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 10px 18px;
  border-radius: 6px;
  font-weight: 600;
  margin-top: 8px;
}
.btn:hover { background: var(--primary); text-decoration: none; }

@media (max-width: 640px) {
  h2 { font-size: 1.35rem; }
  nav.site-nav a { padding: 10px 12px; font-size: 0.9rem; }
  main { padding: 24px 16px 48px; }
}
.lang-switch {
  display: flex;
  gap: 8px;
  align-items: center;
}
.lang-switch a {
  color: #e8f2f9;
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 0.9rem;
  border: 1px solid rgba(255,255,255,0.35);
}
.lang-switch a.active,
.lang-switch a:hover {
  background: rgba(255,255,255,0.15);
  text-decoration: none;
}