.product-anchor-nav {
  width: 100%;
  background: var(--pan-bg, #f7f3eb);
  border-top: 1px solid var(--pan-border, #e5dccd);
  border-bottom: 1px solid var(--pan-border, #e5dccd);
  box-sizing: border-box;
}

/* sticky 必须挂在 section 外壳上，否则父级高度≈导航高度，吸顶无效 */
.product-anchor-nav-section--sticky {
  position: sticky;
  top: var(--pan-sticky-top, 0px);
  z-index: 40;
  background: var(--pan-bg, #f7f3eb);
  /* 外壳再画一条底边，避免平台 overflow 裁掉内层 border */
  box-shadow: 0 1px 0 0 var(--pan-border, #e5dccd);
}

.product-anchor-nav--sticky {
  position: relative;
  z-index: 1;
}

.product-anchor-nav__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: var(--pan-max-width, 1440px);
  margin: 0 auto;
  padding: 0 20px;
  box-sizing: border-box;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.product-anchor-nav__inner::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
}

.product-anchor-nav__list {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: var(--pan-gap, 28px);
  margin: 0 auto;
  padding: 0;
  list-style: none;
  white-space: nowrap;
}

.product-anchor-nav__item {
  margin: 0;
  padding: 0;
}

.product-anchor-nav__link {
  display: inline-flex;
  align-items: center;
  min-height: var(--pan-height, 48px);
  padding: 0 2px;
  color: var(--pan-text, #214f2f);
  font-size: var(--pan-size, 14px);
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  border-bottom: 3px solid transparent;
  box-sizing: border-box;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.product-anchor-nav__link:hover {
  color: var(--pan-active, #214f2f);
}

.product-anchor-nav__link.is-active {
  color: var(--pan-active, #214f2f);
  border-bottom-color: var(--pan-active, #214f2f);
}

@media (max-width: 767.98px) {
  .product-anchor-nav__inner {
    justify-content: flex-start;
    padding-inline: 16px;
  }

  .product-anchor-nav__list {
    justify-content: flex-start;
    gap: 20px;
    margin: 0;
  }

  .product-anchor-nav__link {
    flex-shrink: 0;
    font-size: 13px;
  }
}