:root {
  --product-context-bg: rgba(255, 255, 255, .94);
  --product-context-ink: #173331;
  --product-context-muted: #58716e;
  --product-context-line: rgba(10, 186, 181, .2);
  --product-context-accent: #078f99;
  --product-context-active-bg: #e8fbf9;
  --product-context-shadow: 0 8px 24px rgba(16, 64, 61, .1);
}

.product-context {
  --product-context-height: 64px;
  position: sticky;
  top: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: minmax(170px, 1fr) auto minmax(170px, 1fr);
  align-items: center;
  gap: 16px;
  min-height: 64px;
  width: 100%;
  align-self: stretch;
  padding: 10px clamp(18px, 4vw, 58px);
  border-bottom: 1px solid var(--product-context-line);
  background: var(--product-context-bg);
  box-shadow: var(--product-context-shadow);
  color: var(--product-context-ink);
  backdrop-filter: blur(16px);
}

/* WEHR 保留自身的次導覽列；把它放在共同產品列下方，避免捲動時重疊。 */
.product-context + .topbar {
  top: var(--product-context-height);
}

.product-context a {
  color: inherit;
  text-decoration: none;
}

.product-context-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  font-weight: 900;
}

.product-context-brand img {
  width: 32px;
  height: 32px;
  flex: none;
  object-fit: contain;
}

.product-context-brand span,
.product-context-brand small {
  display: block;
}

.product-context-brand span {
  font-size: 14px;
  line-height: 1.05;
}

.product-context-brand small {
  margin-top: 3px;
  color: var(--product-context-muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .05em;
}

.product-context-products {
  position: relative;
}

.product-context-products summary,
.product-context-home {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 0 14px;
  border: 1px solid var(--product-context-line);
  border-radius: 999px;
  background: transparent;
  color: var(--product-context-accent);
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
}

.product-context-products summary {
  list-style: none;
  cursor: pointer;
}

.product-context-products summary::-webkit-details-marker {
  display: none;
}

.product-context-products summary::after {
  content: "⌄";
  font-size: 16px;
  line-height: 1;
}

.product-context-products[open] summary,
.product-context-home:hover,
.product-context-home:focus-visible {
  border-color: var(--product-context-accent);
  background: var(--product-context-active-bg);
}

.product-context-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  display: grid;
  width: max-content;
  min-width: 220px;
  transform: translateX(-50%);
  padding: 7px;
  border: 1px solid var(--product-context-line);
  border-radius: 16px;
  background: var(--product-context-bg);
  box-shadow: 0 18px 42px rgba(10, 47, 44, .18);
}

.product-context-menu a {
  display: flex;
  align-items: center;
  min-height: 38px;
  padding: 0 12px;
  border-radius: 10px;
  color: var(--product-context-ink);
  font-size: 13px;
  font-weight: 850;
}

.product-context-menu a:hover,
.product-context-menu a:focus-visible,
.product-context-menu a[aria-current="page"] {
  background: var(--product-context-active-bg);
  color: var(--product-context-accent);
}

.product-context-home {
  justify-self: end;
}

.product-context a:focus-visible,
.product-context summary:focus-visible {
  outline: 3px solid var(--product-context-accent);
  outline-offset: 3px;
}

@media (max-width: 760px) {
  .product-context {
    --product-context-height: 100px;
    grid-template-columns: 1fr auto;
    row-gap: 4px;
    column-gap: 8px;
    min-height: 96px;
    padding: 8px 14px;
  }

  .product-context-brand small {
    display: none;
  }

  .product-context-products {
    display: block;
    grid-row: 2;
    grid-column: 1 / -1;
    justify-self: center;
  }

  .product-context-home {
    min-height: 36px;
    padding: 0 11px;
    font-size: 12px;
  }
}