/* ============================================================
   Product detail page
   ============================================================ */

/* 面包屑 */
.breadcrumb {
  background: var(--color-bg);
  padding: 14px 0;
  font-size: 13px;
  color: var(--color-muted);
  border-bottom: 1px solid var(--color-border);
}
.breadcrumb .container { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.breadcrumb a { color: var(--color-muted); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb em { font-style: normal; color: var(--color-text); }

/* 产品主体：左图右文 */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  padding-top: 48px;
  padding-bottom: 48px;
  align-items: start;
}

/* 图片 */
.product-gallery {}
.gallery-main {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}
.gallery-main img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}

.gallery-thumbs {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-top: 12px;
}
.gallery-thumbs .thumb {
  padding: 0;
  border: 2px solid transparent;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  background: #fff;
  transition: var(--transition);
}
.gallery-thumbs .thumb img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}
.gallery-thumbs .thumb.active,
.gallery-thumbs .thumb:hover {
  border-color: var(--color-primary);
}

/* 信息 */
.product-info h1 {
  font-family: var(--font-heading);
  font-size: 28px;
  color: var(--color-primary);
  margin-bottom: 12px;
  line-height: 1.4;
}
.product-info .sku,
.product-info .category {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 6px;
}
.product-info .category a { color: var(--color-primary); }

.product-info .desc {
  font-size: 15px;
  line-height: 1.9;
  color: #444;
  margin: 20px 0;
  padding: 20px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.product-info .specs { margin-bottom: 24px; }
.product-info .specs h3 {
  font-size: 16px;
  color: var(--color-primary);
  margin-bottom: 12px;
  font-family: var(--font-heading);
}
.product-info .specs table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.product-info .specs th,
.product-info .specs td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
}
.product-info .specs th {
  width: 120px;
  color: var(--color-muted);
  font-weight: 400;
  background: var(--color-bg);
}

.product-info .actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

/* 相关产品 */
.product-related { background: var(--color-bg); }

/* ============ 响应式 ============ */

@media (max-width: 1024px) {
  .product-detail { gap: 32px; }
  .product-info h1 { font-size: 24px; }
  .gallery-thumbs { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 768px) {
  .breadcrumb { font-size: 12px; padding: 10px 0; }

  .product-detail {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 24px;
    padding-bottom: 24px;
  }
  .product-info h1 { font-size: 20px; }
  .product-info .desc { font-size: 14px; padding: 16px 0; margin: 16px 0; }
  .product-info .specs th,
  .product-info .specs td { padding: 6px 8px; font-size: 13px; }
  .product-info .specs th { width: 90px; }

  .gallery-thumbs { grid-template-columns: repeat(4, 1fr); gap: 8px; }

  .product-info .actions { flex-direction: column; }
  .product-info .actions .btn { width: 100%; text-align: center; }
}

@media (max-width: 480px) {
  .gallery-thumbs { grid-template-columns: repeat(4, 1fr); gap: 6px; }
}