/* Header V6 — 细顶条 + 底边强调导航 */
body.hf-header-6 .hf-slim-ribbon {
  text-align: center;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 8px 12px;
  background: var(--bg-alt);
  color: var(--text-light);
}
body.hf-header-6 .hf-shell--underline {
  background: #fff;
  border-bottom: 3px solid var(--accent);
  box-shadow: 0 4px 18px rgba(0,0,0,0.04);
}
body.hf-header-6 .hf-underline-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px 0;
}
body.hf-header-6 .hf-logo-under {
  font-size: 1.45rem !important;
}
body.hf-header-6 .hf-nav-underline ul {
  gap: 8px 20px;
}
body.hf-header-6 #main-nav.hf-nav-underline a.active {
  border-bottom: 2px solid var(--accent);
  padding-bottom: 2px;
}