:root {
  --navy: #2a3f5c;
  --amber: #FFD27F;
  --amber-dark: #e8b84b;
  --bg: #f8f6f1;
  --bg-warm: #f2ede4;
  --text: #1a1a1a;
  --text-muted: #6b6b6b;
  --serif: 'Noto Serif TC', serif;
  --sans: 'Noto Sans TC', sans-serif;
  --nav-logo-size: 22px;
  --nav-link-size: 14px;
  --nav-padding-x: 60px;
  --nav-padding-y: 20px;
  --text-xs: 12px;
  --text-sm: 14px;
  --text-body: 16px;
  --text-lead: 20px;
  --content-wide: 1200px;
  --content-reading: 720px;
  --space-section: clamp(72px, 10vw, 120px);
  --radius-card: 20px;
  --radius-button: 12px;
  --shadow-soft: 0 16px 48px rgba(42,63,92,.10);
  --bp-sm: 640px;
  --bp-md: 900px;
  --bp-nav: 960px;
}

.wing-term { color: var(--amber); }

/* Keep intrinsic dimensions as aspect-ratio hints without overriding component sizing. */
img { height: auto; }

:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: .01ms !important; }
}

.bc-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  padding: 48px 60px 24px;
  background: #1a2b3f;
  color: rgba(255,255,255,.72);
}
.bc-footer__brand-wrap { display: flex; flex-direction: column; gap: 8px; }
.bc-footer__brand { font: 500 18px/1 var(--serif); color: rgba(255,255,255,.6); text-decoration: none; }
.bc-footer__brand span { color: var(--amber); }
.bc-footer__tagline { font-size: 14px; color: rgba(255,255,255,.45); letter-spacing: .04em; }
.bc-footer__links { display: flex; gap: 32px; flex-wrap: wrap; margin: 0; padding: 0; list-style: none; }
.bc-footer__links a { color: rgba(255,255,255,.55); font-size: 16px; text-decoration: none; transition: color .2s; }
.bc-footer__links a:hover { color: rgba(255,255,255,.8); }
.bc-footer__social { display: flex; align-items: center; gap: 10px; }
.bc-footer__social a { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; border: 1px solid rgba(255,255,255,.1); border-radius: 8px; color: rgba(255,255,255,.5); background: rgba(255,255,255,.06); text-decoration: none; transition: background .2s, color .2s; }
.bc-footer__social a:hover { border-color: rgba(255,210,127,.3); color: var(--amber); background: rgba(255,210,127,.15); }
.bc-footer__copyright { flex: 1 0 100%; margin-top: 0; padding: 14px 24px 0; border-top: 1px solid rgba(255,255,255,.08); color: rgba(255,255,255,.42); font-size: 12px; letter-spacing: .04em; text-align: center; }

@media (max-width: 959px) {
  .bc-footer { flex-direction: column; padding: 48px 24px 24px; text-align: center; }
  .bc-footer__links { justify-content: center; }
}