/* ========== 产品详情页 ========== */
body.page-product-detail .site-main {
  padding-top: calc(var(--topbar-height) + var(--nav-height));
}

/* 顶部详情图轮播（宽度与 .container 一致） */
.product-detail-carousel {
  padding: 32px 0 0;
  background: #fff;
  overflow: visible;
}

.product-detail-carousel__inner {
  position: relative;
  overflow: visible;
  --product-detail-subnav-row: calc(10px * 2 + 1.35 * 15px);
}

/* 产品名称导航：首项压在轮播底边，其余项向下展开；绝对定位不占文档流 */
.product-detail-carousel__inner .section-subnav--stack {
  top: calc(100% - var(--product-detail-subnav-row));
  right: 30px;
  bottom: auto;
  z-index: 3;
  margin: 0;
  pointer-events: none;
}

.product-detail-carousel__inner .section-subnav__link {
  min-width: 160px;
  padding: 10px 16px;
  font-size: 15px;
  text-align: left;
  pointer-events: auto;
}

.product-detail-carousel__viewport {
  position: relative;
  width: 100%;
  height: clamp(220px, 28vw, 420px);
  overflow: hidden;
  background: #e8eaed;
  border-radius: 2px;
  touch-action: pan-y;
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
}

.product-detail-carousel__viewport:active {
  cursor: grabbing;
}

.product-detail-carousel__slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.6s ease;
  pointer-events: none;
}

.product-detail-carousel__slide.is-active {
  opacity: 1;
  pointer-events: auto;
  z-index: 1;
}

.product-detail-carousel__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.product-detail-body {
  padding: 36px 0 72px;
}

.product-detail-layout {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px 48px;
}

.product-detail-layout--solo {
  display: block;
}

.product-detail-main {
  flex: 1 1 auto;
  min-width: 0;
}

.product-detail-layout:not(.product-detail-layout--solo) .product-detail-main {
  max-width: calc(100% - 280px - 48px);
}

.product-detail-related {
  flex: 0 0 auto;
  width: min(28%, 280px);
  margin-left: auto;
  margin-top: 100px;
}

.product-detail-related__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 14px;
}

.product-detail-related__item {
  width: 100%;
  margin: 0;
  padding: 0;
}

.product-detail-related__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: #e8eaed;
}

.product-detail-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-header-title);
  line-height: 1.45;
  letter-spacing: 0.14em;
  margin-top: 8px;
  margin-bottom: 48px;
  padding-bottom: 0;
  border-bottom: none;
}

.product-detail-block {
  margin-bottom: 40px;
}

.product-detail-block:not(:last-child) {
  margin-bottom: 72px;
}

.product-detail-block+.product-detail-block {
  margin-top: 48px;
}

.product-detail-block__heading {
  font-size: 22px;
  font-weight: 400;
  color: var(--color-header-title);
  margin-bottom: 18px;
  line-height: 1.4;
}

.product-detail-block__content {
  font-size: 18px;
  line-height: 1.9;
  color: #444;
}

.product-detail-rich,
.product-detail-rich p,
.product-detail-rich div,
.product-detail-rich li,
.product-detail-rich span {
  font-size: inherit;
  line-height: inherit;
}

.product-detail-rich strong {
  font-weight: 700;
  color: #333;
}

.product-detail-rich p {
  margin-bottom: 12px;
}

.product-detail-rich p:last-child {
  margin-bottom: 0;
}

.product-detail-rich div {
  margin-bottom: 8px;
}

/* 内页顶栏默认白底 */
body.page-inner .site-header {
  background: #fff;
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.08);
}

body.page-inner .site-header .header-topbar {
  border-bottom-color: var(--color-border);
}

body.page-inner .site-header .header-contacts a,
body.page-inner .site-header .util-btn,
body.page-inner .site-header .lang-switch a,
body.page-inner .site-header .lang-switch span {
  color: var(--color-text-light);
}

body.page-inner .site-header .lang-switch a.is-active {
  color: var(--color-accent);
}

body.page-inner .site-header .site-logo .logo-cn {
  color: var(--color-header-title);
}

body.page-inner .site-header .site-logo .logo-en {
  color: var(--color-accent);
}

body.page-inner .site-header .nav-menu>li>a {
  color: var(--color-header-title);
}

body.page-inner .site-header .nav-menu>li>a.is-active {
  color: var(--color-accent);
}

body.page-inner .site-header .nav-toggle span {
  background: var(--color-header-title);
}

@media (min-width: 1025px) {
  .product-detail-carousel {
    padding-top: 40px;
  }

  .product-detail-carousel__inner {
    --product-detail-subnav-row: calc(12px * 2 + 1.35 * 16px);
  }

  .product-detail-carousel__inner .section-subnav__link {
    min-width: 180px;
    padding: 12px 20px;
    font-size: 16px;
  }

  .product-detail-carousel__viewport {
    height: min(420px, 28vw);
  }

  .product-detail-title {
    font-size: 34px;
    letter-spacing: 0.16em;
    margin-top: 12px;
    margin-bottom: 56px;
  }

  .product-detail-block__heading {
    font-size: 26px;
  }

  .product-detail-block__content {
    font-size: 20px;
    line-height: 1.95;
  }

  .product-detail-block:not(:last-child) {
    margin-bottom: 80px;
  }

  .product-detail-block+.product-detail-block {
    margin-top: 52px;
  }

  .product-detail-layout:not(.product-detail-layout--solo) .product-detail-main {
    max-width: calc(100% - 300px - 48px);
  }

  .product-detail-related {
    width: min(26%, 300px);
  }

  .product-detail-related__list {
    gap: 16px;
  }
}

@media (max-width: 1024px) {
  .product-detail-carousel {
    padding-top: 20px;
  }

  .product-detail-carousel__viewport {
    height: clamp(180px, 42vw, 280px);
  }

  .product-detail-body {
    padding: 28px 0 56px;
  }

  .product-detail-layout {
    flex-direction: column;
    gap: 28px;
  }

  .product-detail-layout:not(.product-detail-layout--solo) .product-detail-main {
    max-width: 100%;
  }

  .product-detail-related {
    width: 100%;
    max-width: 260px;
    margin-left: auto;
  }

  .product-detail-related__list {
    align-items: flex-end;
    gap: 14px;
  }

  .product-detail-title {
    font-size: 22px;
    letter-spacing: 0.12em;
    margin-top: 8px;
    margin-bottom: 40px;
  }

  .product-detail-block {
    margin-bottom: 32px;
  }

  .product-detail-block:not(:last-child) {
    margin-bottom: 60px;
  }

  .product-detail-block+.product-detail-block {
    margin-top: 36px;
  }

  .product-detail-block__heading {
    font-size: 20px;
    margin-bottom: 12px;
  }

  .product-detail-block__content {
    font-size: 17px;
    line-height: 1.85;
  }
}

@media (max-width: 480px) {
  .product-detail-title {
    font-size: 18px;
    letter-spacing: 0.1em;
    margin-top: 6px;
    margin-bottom: 32px;
  }

  .product-detail-block__heading {
    font-size: 18px;
  }

  .product-detail-block__content {
    font-size: 16px;
  }
}