/* V21: homepage header aligned to the card-list header. */
.top-header {
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid #ececea;
  backdrop-filter: blur(18px);
  font-family: Arial, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
}

.top-header .header-inner {
  width: 100%;
  max-width: 1280px;
  height: 72px;
  margin: 0 auto;
  padding: 0 28px;
  gap: 36px;
}

.top-header .header-inner > .brand {
  position: static;
  display: flex;
  flex: 0 1 auto;
  align-items: center;
  width: 132px;
  height: 52px;
  margin: 0;
  transform: none;
}

.top-header .header-inner > .brand img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  object-fit: contain;
}

.top-header .desktop-nav {
  display: flex;
  align-items: center;
  gap: 26px;
}

.top-header .desktop-nav a {
  padding: 26px 0;
  font-size: 14px;
  font-weight: 800;
  line-height: normal;
}

.top-header .desktop-nav a::after {
  bottom: 18px;
  height: 3px;
  border-radius: 3px;
}

.top-header .desktop-nav a:first-child::after {
  transform: scaleX(1);
  transform-origin: left;
}

.top-header .header-actions {
  position: static;
  margin-left: auto;
}

.top-header .lang-switch {
  padding: 3px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
}

.top-header .lang-switch button {
  padding: 7px 10px;
  font-size: 11px;
  font-weight: 900;
  line-height: normal;
}

.mobile-site-nav { display: none; }

@media (max-width: 900px) and (min-width: 641px) {
  .top-header .desktop-nav { display: flex; }
  .top-header .header-inner > .brand {
    width: 132px;
    height: 52px;
  }
}

@media (max-width: 640px) {
  .top-header { overflow: visible; }

  .top-header .header-inner {
    position: relative;
    justify-content: center;
    width: 100%;
    height: 62px;
    padding: 0 15px;
  }

  .top-header .desktop-nav { display: none; }

  .top-header .header-inner > .brand {
    position: static;
    left: auto;
    width: 112px;
    height: 46px;
    transform: none;
  }

  .top-header .header-actions {
    position: absolute;
    right: 13px;
    margin: 0;
  }

  .top-header .lang-switch button {
    padding: 6px 8px;
    font-size: 9px;
  }

  .mobile-site-nav {
    position: absolute;
    left: 14px;
    top: 50%;
    z-index: 5;
    display: block;
    transform: translateY(-50%);
  }

  .mobile-menu-toggle {
    display: flex;
    width: 38px;
    height: 38px;
    padding: 8px;
    border: 0;
    color: #111;
    background: transparent;
    flex-direction: column;
    justify-content: center;
    cursor: pointer;
  }

  .mobile-menu-icon {
    position: relative;
    width: 21px;
    height: 12px;
  }

  .mobile-menu-icon::before,
  .mobile-menu-icon::after,
  .mobile-menu-icon span {
    content: "";
    position: absolute;
    left: 0;
    width: 21px;
    height: 2px;
    border-radius: 2px;
    background: currentColor;
    transition: top 0.2s, transform 0.2s, opacity 0.15s;
  }

  .mobile-menu-icon::before { top: 0; }
  .mobile-menu-icon span { top: 5px; }
  .mobile-menu-icon::after { top: 10px; }
  .mobile-site-nav.is-open .mobile-menu-icon::before { top: 5px; transform: rotate(45deg); }
  .mobile-site-nav.is-open .mobile-menu-icon span { opacity: 0; }
  .mobile-site-nav.is-open .mobile-menu-icon::after { top: 5px; transform: rotate(-45deg); }

  .mobile-nav-panel {
    visibility: hidden;
    opacity: 0;
    position: fixed;
    top: 62px;
    left: 0;
    width: 100vw;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 9px 14px 12px;
    border-top: 1px solid #eee;
    background: #fff;
    box-shadow: 0 16px 30px rgba(0, 0, 0, 0.11);
    transform: translateY(-5px);
    transition: visibility 0.18s, opacity 0.18s, transform 0.18s;
    pointer-events: none;
  }

  .mobile-site-nav.is-open .mobile-nav-panel {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .mobile-nav-kicker { display: none; }

  .mobile-nav-panel a {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 10px;
    border: 1px solid #ddd;
    border-radius: 12px;
    color: #111;
    background: #fff;
    font-size: 12px;
    font-weight: 900;
    text-align: center;
  }

  .mobile-nav-panel a + a { margin: 0; }
  .mobile-nav-panel a::after { display: none; }
  .mobile-nav-panel a.is-current { color: #fff; border-color: #111; background: #111; }
}

@media (prefers-reduced-motion: reduce) {
  .mobile-menu-icon::before,
  .mobile-menu-icon::after,
  .mobile-menu-icon span,
  .mobile-nav-panel { transition-duration: 0.01ms; }
}