.skip-link:focus-visible {
  position: fixed;
  top: var(--sp-2);
  left: var(--sp-2);
  z-index: 300;
  width: auto;
  height: auto;
  margin: 0;
  padding: 0.75rem 1rem;
  overflow: visible;
  clip: auto;
  clip-path: none;
  background: var(--c-primary);
  color: #fff;
  font-weight: 600;
}

.logo__text {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--c-text-strong);
}

.site-header--overlay .logo__text {
  color: #fff;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.125rem;
}

.lang-switch__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  height: 2rem;
  padding-inline: 0.5rem;
  border-radius: var(--radius-sm);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--c-text-muted);
  transition: background-color var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.lang-switch__flag {
  width: 1.25rem;
  height: 0.9375rem;
  flex: none;
  border-radius: 2px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.08);
}

.lang-switch__link:hover {
  background: var(--c-surface-alt);
  color: var(--c-primary);
}

.lang-switch__link.is-current {
  color: var(--c-text-strong);
}

/* overlay 首屏：下拉菜单是浅色面板，链接文字须复位为深色，避免白底白字 */
.site-header--overlay .lang-switch__menu .lang-switch__link {
  color: var(--c-text-muted);
}

.site-header--overlay .lang-switch__menu .lang-switch__link:hover,
.site-header--overlay .lang-switch__menu .lang-switch__link.is-current {
  background: var(--c-surface-alt);
  color: var(--c-primary);
}

.mobile-nav .lang-switch {
  flex-wrap: wrap;
  gap: 0.25rem;
  margin-top: var(--sp-5);
  margin-bottom: calc(-1 * var(--sp-1));
}

.mobile-nav .lang-switch__link {
  height: 2.5rem;
  padding-inline: 0.75rem;
  font-size: var(--fs-sm);
}

/* ---------- language dropdown (header actions) ---------- */

.lang-switch--dropdown {
  position: relative;
}

.lang-switch__toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  height: 2.25rem;
  padding-inline: 0.5rem;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--c-text-muted);
  font: inherit;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.lang-switch__toggle:hover,
.lang-switch__toggle[aria-expanded="true"] {
  color: var(--c-primary);
}

.lang-switch__globe {
  width: 1.125rem;
  height: 1.125rem;
  flex: none;
}

.lang-switch__caret {
  width: 0.75rem;
  height: 0.75rem;
  flex: none;
}

.lang-switch__menu {
  position: absolute;
  top: calc(100% + 0.375rem);
  right: 0;
  z-index: 60;
  min-width: 11rem;
  margin: 0;
  padding: 0.375rem;
  list-style: none;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-float);
}

.lang-switch--dropdown .lang-switch__link {
  justify-content: space-between;
  width: 100%;
  height: 2.25rem;
  padding-inline: 0.625rem;
  text-transform: none;
  letter-spacing: 0.02em;
}

.lang-switch__tick {
  margin-inline-start: auto;
  color: var(--c-primary);
  font-weight: 700;
}

.site-header--overlay .lang-switch__toggle {
  color: rgba(255, 255, 255, 0.8);
}

.site-header--overlay .lang-switch__toggle:hover,
.site-header--overlay .lang-switch__toggle[aria-expanded="true"] {
  color: #fff;
}

body.admin-bar .site-header {
  top: 32px;
}

body.admin-bar .mobile-nav {
  top: calc(5rem + 32px);
}

@media screen and (max-width: 782px) {
  body.admin-bar .site-header {
    top: 46px;
  }

  body.admin-bar .mobile-nav {
    top: calc(5rem + 46px);
  }
}

:where(main) [id] {
  scroll-margin-top: 5rem;
}

body.admin-bar :where(main) [id] {
  scroll-margin-top: calc(5rem + 32px);
}

@media screen and (max-width: 782px) {
  body.admin-bar :where(main) [id] {
    scroll-margin-top: calc(5rem + 46px);
  }
}

/* ---------- header search panel ---------- */

.search-panel {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 250;
  padding-block: var(--sp-5);
  background: var(--c-surface);
  border-top: 1px solid var(--c-border);
  box-shadow: var(--shadow-float);
}

.search-panel__form {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.search-panel__icon {
  flex: none;
  width: 1.25rem;
  height: 1.25rem;
  color: var(--c-text-muted);
}

.search-panel__input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: transparent;
  font-size: 1.125rem;
  line-height: 2.75rem;
  color: var(--c-text-strong);
}

.search-panel__input:focus {
  outline: none;
}

.search-panel__close {
  flex: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--c-text-muted);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}

.search-panel__close:hover {
  background: var(--c-surface-muted);
  color: var(--c-text-strong);
}

.search-panel__form::after {
  content: "";
  position: absolute;
  left: var(--gutter);
  right: var(--gutter);
  bottom: 0;
  height: 1px;
  background: var(--c-border);
}

.search-panel__results {
  display: flex;
  flex-direction: column;
  max-height: 60vh;
  overflow-y: auto;
  padding-top: var(--sp-3);
}

.search-panel__item {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  padding: var(--sp-3) var(--sp-2);
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.search-panel__item:hover {
  background: var(--c-surface-muted);
}

.search-panel__item-title {
  font-size: var(--fs-body);
  font-weight: 600;
  color: var(--c-text-strong);
}

.search-panel__item-excerpt {
  font-size: var(--fs-small);
  color: var(--c-text-muted);
}

.search-panel__item-excerpt mark {
  background: none;
  color: var(--c-primary);
  font-weight: 600;
}

.search-panel__empty {
  padding: var(--sp-3) var(--sp-2);
  font-size: var(--fs-small);
  color: var(--c-text-muted);
}

@media (max-width: 640px) {
  .search-panel {
    padding-block: var(--sp-3);
  }
  .search-panel__input {
    font-size: 1rem;
    line-height: 2.5rem;
  }
}