/* 站点级顶栏导航（gfa-minimal 子主题 · 清新自然风） */
.gfa-site-header {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 14px; padding: 14px 22px;
  border-bottom: 1px solid var(--gfa-line);
  background: rgba(250, 248, 241, .88);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  backdrop-filter: saturate(140%) blur(10px);
  position: sticky; top: 0; z-index: 50;
}
.gfa-site-header .wp-block-site-title a {
  font-family: var(--gfa-font); font-size: 22px; font-weight: 700;
  color: var(--gfa-ink); text-decoration: none; letter-spacing: -.01em;
}
.gfa-site-nav ul {
  display: flex; flex-wrap: wrap; gap: 4px; list-style: none; margin: 0; padding: 0;
}
.gfa-site-nav li a {
  display: inline-block; padding: 8px 14px; border-radius: 999px;
  font-size: .95rem; font-weight: 500; color: var(--gfa-ink);
  text-decoration: none; transition: .18s;
}
.gfa-site-nav li a:hover { background: var(--gfa-accent-soft); color: var(--gfa-accent); }
.gfa-site-nav li.current-menu-item > a,
.gfa-site-nav li a.is-active { background: var(--gfa-accent); color: #fff; }
@media (max-width: 640px) {
  .gfa-site-header { justify-content: center; }
  .gfa-site-nav ul { justify-content: center; }
}