/*! 站点顶部切换栏（由 assets/nav.js 注入） */

.site-nav {
  flex: 0 0 auto;
  background: #0f172a;
  color: #e2e8f0;
  font: 14px/1.4 "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  position: relative;
  z-index: 50;
}

.site-nav-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 16px;
  height: 46px;
  max-width: 1800px;
  margin: 0 auto;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 9px;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: .3px;
  white-space: nowrap;
}
.site-brand .site-logo {
  width: 24px; height: 24px;
  display: grid; place-items: center;
  border-radius: 7px;
  background: linear-gradient(140deg, #ffd977, #ffb347);
  font-size: 14px;
}
.site-brand small {
  color: #94a3b8; font-weight: 500; font-size: 12px;
  padding-left: 10px; margin-left: 4px;
  border-left: 1px solid rgba(255,255,255,.14);
}

.site-tabs { display: flex; align-items: center; gap: 6px; margin-left: auto; }

.site-tab {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  color: #cbd5e1;
  text-decoration: none;
  font-size: 13.5px;
  border: 1px solid transparent;
  transition: background .15s, color .15s;
  white-space: nowrap;
}
.site-tab:hover { background: rgba(255,255,255,.12); color: #fff; }
.site-tab.active { background: #fff; color: #0f172a; font-weight: 600; }
.site-tab .tab-icon { font-size: 14px; }

@media (max-width: 640px) {
  .site-brand small { display: none; }
  .site-nav-inner { padding: 0 10px; gap: 8px; }
  .site-tab { padding: 6px 10px; font-size: 12.5px; }
  .site-tab .tab-icon { display: none; }
}