.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 26px 24px 0;
  color: #64748b;
  font-size: 13px;
}

.breadcrumb a:hover {
  color: var(--accent);
}

.product-detail {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 54px;
  align-items: start;
  max-width: 1180px;
  margin: 0 auto;
  padding: 44px 24px 80px;
}

.product-main-image {
  display: grid;
  min-height: 540px;
  place-items: center;
  border: 1px solid var(--line);
  background: #fff;
}

.product-main-image img {
  width: 100%;
  height: 100%;
  max-height: 540px;
  object-fit: contain;
}

.product-thumbnails {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.product-thumbnails button {
  aspect-ratio: 1;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
}

.product-thumbnails button:hover,
.product-thumbnails button.is-active {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.product-thumbnails img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-summary h1 {
  margin-bottom: 8px;
  font-size: 46px;
}

.product-name-cn {
  margin-bottom: 18px;
  color: #475569;
  font-size: 21px;
  font-weight: 700;
}

.product-model-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.product-model-row span {
  padding: 6px 10px;
  border: 1px solid #cbd5e1;
  border-radius: 999px;
  background: #fff;
  color: #334155;
  font-size: 13px;
  font-weight: 700;
}

.product-intro {
  margin-bottom: 28px;
  color: #475569;
}

.key-specs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0 0 30px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.key-specs div {
  min-width: 0;
  padding: 16px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.key-specs dt {
  margin-bottom: 4px;
  color: #64748b;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.key-specs dd {
  margin: 0;
  color: #0f1724;
  font-weight: 800;
}

.product-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.engineering-note {
  margin: 0;
  color: #64748b;
  font-size: 13px;
}

.detail-band {
  padding: 78px 24px;
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.detail-heading,
.detail-columns {
  max-width: 1180px;
  margin-right: auto;
  margin-left: auto;
}

.detail-heading {
  margin-bottom: 34px;
}

.detail-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.72fr);
  gap: 42px;
  align-items: start;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.spec-table th,
.spec-table td {
  padding: 15px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.spec-table th {
  width: 34%;
  color: #334155;
  font-weight: 800;
}

.spec-table td {
  color: #52657d;
}

.application-panel {
  border-left: 3px solid var(--accent);
  background: #f4f7fa;
}

.application-panel img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.application-panel div {
  padding: 24px;
}

.application-panel ul {
  margin: 0;
  padding-left: 20px;
  color: #52657d;
}

.inquiry-section {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 48px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 84px 24px;
}

.inquiry-copy > p:not(.eyebrow) {
  color: #52657d;
}

@media (max-width: 900px) {
  .product-detail,
  .detail-columns,
  .inquiry-section {
    grid-template-columns: 1fr;
  }

  .product-main-image {
    min-height: 460px;
  }
}

@media (max-width: 720px) {
  .breadcrumb {
    padding: 18px 16px 0;
  }

  .product-detail {
    gap: 30px;
    padding: 26px 16px 58px;
  }

  .product-main-image {
    min-height: 0;
    aspect-ratio: 1;
  }

  .product-summary h1 {
    font-size: 34px;
  }

  .key-specs {
    grid-template-columns: 1fr;
  }

  .detail-band,
  .inquiry-section {
    padding: 58px 16px;
  }

  .detail-columns {
    gap: 28px;
  }

  .spec-table th,
  .spec-table td {
    display: block;
    width: 100%;
    padding: 10px 12px;
  }

  .spec-table th {
    padding-bottom: 2px;
    border-bottom: 0;
  }

  .spec-table td {
    padding-top: 2px;
  }
}