/* =====================================================
   产品详情页样式
   仅作用于面包屑、产品主体与推荐区，不覆盖顶部/底部导航
   ===================================================== */

:root {
  --pd-gold: #f6b400;
  --pd-gold-dark: #d99a00;
  --pd-text: #151515;
  --pd-muted: #666;
  --pd-light: #f7f7f7;
  --pd-border: #ececec;
  --pd-card-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
}

/* ===== 面包屑 ===== */
.breadcrumb {
  margin-top: var(--site-header-height, 70px);
  background: #fff;
  border-bottom: 1px solid #f0f0f0;
  padding: 14px 0;
  font-size: 13px;
  color: #9a9a9a;
}

.breadcrumb .container {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb a {
  color: #8a8a8a;
  transition: color 0.2s ease;
}

.breadcrumb a:hover {
  color: var(--pd-gold-dark);
}

.breadcrumb .sep {
  color: #c8c8c8;
  font-size: 12px;
}

.breadcrumb .current {
  color: #555;
}

/* ===== 产品详情页整体 ===== */
.product-detail-page {
  background: #fff;
  color: var(--pd-text);
}

/* ===== 产品首屏 ===== */
.product-hero {
  padding: 24px 0 36px;
}

.product-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 1fr);
  gap: 48px;
  align-items: start;
}

/* ===== 图片画廊 ===== */
.product-gallery {
  min-width: 0;
}

.gallery-main {
  position: relative;
  overflow: hidden;
  border-radius: 6px;
  background: linear-gradient(135deg, #f8f8f8 0%, #ffffff 45%, #f4f4f4 100%);
  border: 1px solid #ebebeb;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gallery-main-img {
  width: 100%;
  height: 100%;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gallery-main-img img {
  max-width: 85%;
  max-height: 380px;
  object-fit: contain;
  display: block;
}

/* 主图左右箭头 */
.gallery-control {
  position: absolute;
  top: 50%;
  z-index: 2;
  width: 36px;
  height: 36px;
  border: 0;
  background: rgba(255, 255, 255, 0.85);
  color: #1f1f1f;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  transform: translateY(-50%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease, background 0.2s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}

.gallery-control:hover {
  color: var(--pd-gold-dark);
  background: #fff;
}

.gallery-control--prev { left: 14px; }
.gallery-control--next { right: 14px; }

/* 缩略图区域 */
.gallery-thumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
}

.thumbs-track {
  display: flex;
  gap: 12px;
  flex: 1;
  overflow: hidden;
}

.thumb {
  flex: 0 0 78px;
  width: 78px;
  height: 78px;
  border: 2px solid transparent;
  border-radius: 4px;
  background: #f4f4f4;
  padding: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  overflow: hidden;
}

.thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.thumb.active,
.thumb:hover {
  border-color: var(--pd-gold);
  box-shadow: 0 0 0 2px rgba(246, 180, 0, 0.12);
}

/* 缩略图左右箭头 */
.thumb-arrow {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border: 1px solid #e0e0e0;
  background: #fff;
  color: #555;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.thumb-arrow:hover {
  color: var(--pd-gold-dark);
  border-color: var(--pd-gold);
}

/* ===== 产品信息区 ===== */
.product-info {
  padding-top: 6px;
}

.product-tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 5px 18px;
  border-radius: 14px;
  background: var(--pd-gold);
  color: #111;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
}

.product-title {
  font-size: clamp(36px, 4.5vw, 52px);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #111;
  margin: 0 0 12px;
}

.product-subtitle {
  font-size: 21px;
  color: #555;
  margin-bottom: 20px;
}

.standard-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.standard-pills span {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 20px;
  border-radius: 16px;
  background: #111;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
}

.product-desc {
  max-width: 580px;
  color: #484848;
  font-size: 17px;
  line-height: 1.85;
  margin-bottom: 32px;
}

/* 四大性能图标 */
.benefit-icons {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.benefit-item {
  text-align: center;
  min-width: 0;
}

.benefit-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 10px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #111;
  background: #fff;
  border: 2px solid #f0d37e;
}

.benefit-icon svg {
  width: 26px;
  height: 26px;
  stroke-width: 1.7;
}

.benefit-item strong {
  display: block;
  font-size: 16px;
  color: #111;
  line-height: 1.35;
  margin-bottom: 6px;
}

.benefit-item small {
  display: block;
  font-size: 14px;
  color: #777;
  line-height: 1.45;
}

/* 操作按钮 */
.product-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.btn {
  min-width: 150px;
  height: 48px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--pd-gold);
  color: #111;
  border-color: var(--pd-gold);
}

.btn-primary:hover {
  background: var(--pd-gold-dark);
  border-color: var(--pd-gold-dark);
}

.btn-outline {
  background: #fff;
  color: #111;
  border-color: #ccc;
}

.btn-outline:hover {
  border-color: var(--pd-gold);
  color: var(--pd-gold-dark);
}

/* ===== 通用区块样式 ===== */
.content-section {
  padding: 36px 0;
  border-top: 1px solid #f0f0f0;
}

.section-title {
  position: relative;
  color: #111;
  font-size: 24px;
  font-weight: 800;
  line-height: 1.2;
  margin: 0 0 22px;
  padding-bottom: 11px;
}

.section-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 34px;
  height: 3px;
  border-radius: 2px;
  background: var(--pd-gold);
}

/* ===== 产品描述 + 核心优势（左右两栏） ===== */
.product-desc-advantages {
  padding: 40px 0;
}

.desc-adv-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.detail-text {
  color: #4e4e4e;
  font-size: 14.5px;
  line-height: 1.9;
  margin: 0;
}

/* 核心优势列表 */
.advantage-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.advantage-list li {
  position: relative;
  padding-left: 26px;
  color: #444;
  font-size: 14px;
  line-height: 1.7;
}

.advantage-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  width: 17px;
  height: 17px;
  border: 1px solid var(--pd-gold);
  border-radius: 3px;
  color: var(--pd-gold-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 800;
  background: #fffbf0;
}

/* ===== 适用范围 + 卓越保护 Banner（左右两栏） ===== */
.product-scope-banner {
  padding: 40px 0;
}

.scope-banner-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

/* 适用范围图标 */
.application-options {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  align-items: start;
}

.application-item {
  text-align: center;
}

.application-item svg {
  width: 52px;
  height: 52px;
  margin: 0 auto 10px;
  display: block;
  color: #333;
  stroke-width: 1.3;
}

.application-item strong {
  display: block;
  color: #333;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.4;
}

/* 卓越保护 Banner */
.protection-banner {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  min-height: 200px;
  background: #111;
  display: flex;
  align-items: flex-end;
}

.protection-banner-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}

.protection-banner-overlay {
  position: relative;
  z-index: 1;
  padding: 28px 30px;
  color: #fff;
}

.protection-banner-overlay h3 {
  font-size: 22px;
  font-weight: 800;
  margin: 0 0 10px;
  color: #fff;
}

.protection-banner-overlay p {
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
  margin: 0;
}

/* ===== 包装规格（全宽独立区块） ===== */
.product-packaging {
  padding: 40px 0;
}

.packaging-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
  align-items: end;
  margin-top: 8px;
}

.packaging-item {
  text-align: center;
}

.packaging-img-wrap {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  min-height: 160px;
  margin-bottom: 14px;
}

.packaging-img-wrap img {
  max-width: 100%;
  max-height: 160px;
  object-fit: contain;
  display: block;
}

.packaging-item strong {
  display: block;
  color: #333;
  font-size: 15px;
  font-weight: 700;
}

/* ===== 相关产品推荐 ===== */
.section-related {
  padding: 40px 0 60px;
  background: #fff;
  border-top: 1px solid #f0f0f0;
}

.section-heading-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 8px;
}

.section-heading-row .section-title {
  margin-bottom: 0;
}

.view-all-link {
  color: #333;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 9px;
  white-space: nowrap;
  transition: color 0.2s ease;
  text-decoration: none;
}

.view-all-link:hover {
  color: var(--pd-gold-dark);
}

/* 轮播 */
.related-carousel {
  position: relative;
  display: flex;
  align-items: stretch;
  gap: 16px;
  margin-top: 24px;
}

.carousel-track-wrapper {
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.carousel-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  transition: transform 0.35s ease;
}

.carousel-arrow {
  align-self: center;
  flex: 0 0 auto;
  width: 36px;
  height: 60px;
  border: 1px solid #e0e0e0;
  background: #fff;
  color: #333;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.carousel-arrow:hover {
  color: var(--pd-gold-dark);
  border-color: var(--pd-gold);
}

/* 产品卡片 */
.product-card {
  min-width: 0;
  border: 1px solid var(--pd-border);
  border-radius: 4px;
  background: #fff;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.product-card:hover {
  transform: translateY(-3px);
  border-color: #f0d37e;
  box-shadow: var(--pd-card-shadow);
}

.card-product-visual {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fafafa;
  border-bottom: 1px solid #f0f0f0;
  overflow: hidden;
}

.card-product-visual img {
  max-width: 80%;
  max-height: 140px;
  object-fit: contain;
  display: block;
}

.card-info {
  padding: 16px 18px 20px;
}

.card-info h3 {
  margin: 0 0 6px;
  color: #111;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.3;
}

.card-type,
.card-spec {
  margin: 0;
  color: #777;
  font-size: 13px;
  line-height: 1.5;
}

.card-spec {
  color: #9a9a9a;
  margin-bottom: 12px;
}

.card-link {
  color: #111;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  transition: color 0.2s ease;
}

.card-link:hover {
  color: var(--pd-gold-dark);
}

/* ===== 响应式 ===== */
@media (max-width: 1180px) {
  .product-hero__grid {
    gap: 32px;
  }

  .desc-adv-grid,
  .scope-banner-grid {
    gap: 36px;
  }

  .benefit-icons {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  .product-hero__grid {
    grid-template-columns: 1fr;
  }

  .gallery-main,
  .gallery-main-img {
    min-height: 360px;
  }

  .desc-adv-grid,
  .scope-banner-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .packaging-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

  .carousel-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .breadcrumb {
    padding: 10px 0;
  }

  .product-hero {
    padding-top: 16px;
  }

  .gallery-main,
  .gallery-main-img {
    min-height: 300px;
  }

  .product-tag {
    font-size: 14px;
    padding: 5px 16px;
  }

  .product-title {
    font-size: 32px;
  }

  .product-subtitle {
    font-size: 19px;
  }

  .product-desc {
    font-size: 16px;
  }

  .benefit-icons {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .benefit-item strong {
    font-size: 15px;
  }

  .benefit-item small {
    font-size: 13px;
  }

  .application-options {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .section-heading-row {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .related-carousel {
    gap: 8px;
  }

  .carousel-arrow {
    display: none;
  }

  .thumb {
    flex: 0 0 62px;
    width: 62px;
    height: 62px;
  }
}

@media (max-width: 520px) {
  .product-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .packaging-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .carousel-track {
    grid-template-columns: 1fr;
  }

  .desc-adv-grid,
  .scope-banner-grid {
    gap: 24px;
  }
}


/* =====================================================
   工业产品描述页：参考图式详情布局增强
   作用范围：工业产品描述.html 的描述、参数、信息卡片、包装、适用范围与推荐产品区域
   ===================================================== */

.product-detail-page {
  background: #fff;
}

.product-detail-page .content-section {
  border-top: 0;
}

.product-description {
  padding: 48px 0 30px;
}

.description-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(420px, 0.95fr);
  gap: clamp(42px, 6vw, 86px);
  align-items: start;
}

.description-copy {
  min-width: 0;
}

.product-description .section-title,
.product-parameters .section-title,
.section-related .section-title {
  margin-bottom: 20px;
  padding-bottom: 10px;
  font-size: clamp(22px, 2.2vw, 28px);
  letter-spacing: -0.02em;
}

.product-description .detail-text {
  max-width: 790px;
  margin-bottom: 26px;
  color: #3f3f3f;
  font-size: 15px;
  line-height: 1.95;
}

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.feature-list--two-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: clamp(28px, 5vw, 72px);
  row-gap: 13px;
}

.feature-list li {
  position: relative;
  padding-left: 18px;
  color: #3f3f3f;
  font-size: 14px;
  line-height: 1.7;
}

.feature-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--pd-gold);
  box-shadow: 0 0 0 3px rgba(246, 180, 0, 0.12);
  transform: translateY(-50%);
}

.description-media {
  min-width: 0;
  width: 100%;
  padding-top: 8px;
  align-self: start;
}

.oil-scene {
  position: relative;
  width: 100%;
  min-height: clamp(240px, 19vw, 286px);
  aspect-ratio: 2.05 / 1;
  overflow: hidden;
  border-radius: 6px;
  background:
    radial-gradient(circle at 30% 18%, rgba(255,255,255,0.28) 0 1px, transparent 2px),
    radial-gradient(circle at 62% 35%, rgba(255,255,255,0.18) 0 1px, transparent 2px),
    linear-gradient(135deg, rgba(0,0,0,0.88), rgba(33,33,33,0.86) 46%, rgba(0,0,0,0.98)),
    linear-gradient(155deg, #3a3a3a 0%, #101010 100%);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.12);
}

.oil-scene::before {
  content: '';
  position: absolute;
  left: 10%;
  right: 6%;
  bottom: 22px;
  height: 158px;
  border-radius: 60px 60px 34px 34px;
  background:
    radial-gradient(circle at 27% 76%, rgba(0,0,0,0.98) 0 18px, rgba(33,33,33,0.94) 19px 35px, transparent 36px),
    linear-gradient(18deg, transparent 0 30%, rgba(155,155,155,0.22) 31% 38%, transparent 39%),
    linear-gradient(140deg, #050505, #242424 44%, #0b0b0b 100%);
  transform: skewX(-15deg);
  opacity: 0.96;
}

.oil-scene::after {
  content: '';
  position: absolute;
  right: -3%;
  top: 16px;
  width: 56%;
  height: 72px;
  border-radius: 18px 0 0 18px;
  background: linear-gradient(160deg, #111 0%, #3d3d3d 44%, #050505 100%);
  transform: rotate(18deg);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.18), 0 8px 22px rgba(0,0,0,0.35);
}

.oil-stream {
  position: absolute;
  left: 49%;
  top: 42px;
  z-index: 2;
  width: 24px;
  height: 150px;
  border-radius: 999px;
  background: linear-gradient(90deg, #5f2600 0%, #b8650d 34%, #f0a629 58%, #653100 100%);
  transform: rotate(14deg);
  filter: drop-shadow(0 0 8px rgba(246, 180, 0, 0.45));
}

.product-parameters {
  padding: 28px 0 36px;
}

.parameters-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 1.12fr);
  gap: clamp(34px, 5vw, 72px);
  align-items: start;
}

.parameter-table-wrap,
.parameter-side {
  min-width: 0;
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  background: #fff;
  border: 1px solid #eeeeee;
  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.035);
}

.specs-table tr {
  border-bottom: 1px solid #eeeeee;
}

.specs-table tr:last-child {
  border-bottom: 0;
}

.specs-table th,
.specs-table td {
  padding: 12px 20px;
  color: #252525;
  font-size: 14px;
  line-height: 1.45;
  text-align: left;
  vertical-align: middle;
}

.specs-table th {
  width: 39%;
  background: #fafafa;
  border-right: 1px solid #eeeeee;
  font-weight: 800;
}

.specs-table td {
  background: #fff;
  font-weight: 500;
}

.parameter-side {
  display: grid;
  gap: 10px;
  padding-top: 1px;
}

.info-card {
  border: 1px solid #efefef;
  border-radius: 6px;
  background: #fbfbfc;
  padding: 22px 26px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.035);
}

.info-card h3 {
  margin: 0 0 18px;
  color: #111;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.35;
}

.cert-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 13px;
}

.cert-list li {
  position: relative;
  padding-left: 28px;
  color: #282828;
  font-size: 14px;
  line-height: 1.35;
}

.cert-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 50%;
  width: 15px;
  height: 15px;
  border: 1px solid #d6ac3d;
  border-radius: 4px;
  color: #9c7100;
  background: #fffaf0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 900;
  transform: translateY(-50%);
}

.package-card,
.application-card {
  padding-top: 20px;
  padding-bottom: 18px;
}

.package-options {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  align-items: end;
}

.package-item {
  display: grid;
  justify-items: center;
  align-content: end;
  min-height: 98px;
  text-align: center;
}

.package-item strong {
  display: block;
  margin-top: 9px;
  color: #151515;
  font-size: 13px;
  font-weight: 800;
}

.pack-visual {
  position: relative;
  width: 38px;
  height: 58px;
  border-radius: 7px 7px 4px 4px;
  background: linear-gradient(150deg, #050505 0%, #363636 52%, #0d0d0d 100%);
  color: transparent;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08), 0 9px 16px rgba(15, 23, 42, 0.14);
}

.pack-visual::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 10px;
  width: 18px;
  height: 12px;
  border-radius: 7px 7px 2px 2px;
  border: 4px solid #111;
  background: transparent;
  transform: rotate(-28deg);
}

.pack-visual::after {
  content: attr(class);
  position: absolute;
  left: 50%;
  bottom: 12px;
  width: 26px;
  height: 14px;
  border-radius: 2px;
  background: linear-gradient(135deg, #f4f4f4 0 45%, var(--pd-gold) 46% 70%, #111 71% 100%);
  transform: translateX(-50%);
}

.pack-visual--small {
  width: 30px;
  height: 48px;
}

.pack-visual--drum {
  width: 58px;
  height: 52px;
  border-radius: 13px 13px 8px 8px;
}

.pack-visual--drum::before,
.pack-visual--barrel::before {
  display: none;
}

.pack-visual--barrel {
  width: 46px;
  height: 72px;
  border-radius: 11px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.15), transparent 18% 82%, rgba(255,255,255,0.14)),
    linear-gradient(90deg, #090909, #323232 50%, #070707);
}

.application-card .application-options {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.application-card .application-item svg {
  width: 42px;
  height: 42px;
  margin-bottom: 8px;
  color: #252525;
  stroke-width: 1.45;
}

.application-card .application-item strong {
  color: #151515;
  font-size: 13px;
  font-weight: 800;
}

.section-related {
  padding: 34px 0 70px;
  border-top: 0;
}

.section-heading-row {
  margin-bottom: 18px;
}

.related-carousel {
  margin-top: 8px;
  gap: 18px;
}

.carousel-track {
  gap: 28px;
}

.product-card {
  border-color: #f0f0f0;
  border-radius: 0;
  box-shadow: 0 8px 26px rgba(15, 23, 42, 0.035);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.09);
}

.card-product-visual {
  height: 142px;
  background: #fff;
  border-bottom: 0;
  align-items: flex-end;
  padding-bottom: 4px;
}

.card-bottle {
  position: relative;
  display: inline-flex;
  align-items: flex-end;
  justify-content: center;
  width: 62px;
  height: 112px;
  padding-bottom: 22px;
  border-radius: 10px 12px 7px 7px;
  background: linear-gradient(145deg, #050505 0%, #3c3c3c 52%, #0b0b0b 100%);
  color: #fff;
  font-size: 9px;
  font-weight: 900;
  letter-spacing: -0.02em;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08), 0 14px 20px rgba(15,23,42,0.16);
  transform: perspective(120px) rotateY(-5deg);
}

.card-bottle::before {
  content: '';
  position: absolute;
  top: -10px;
  right: 13px;
  width: 22px;
  height: 24px;
  border-radius: 5px 5px 1px 1px;
  background: #0a0a0a;
}

.card-bottle::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 35px;
  width: 42px;
  height: 28px;
  border-radius: 2px;
  background: linear-gradient(135deg, #fff 0 42%, var(--pd-gold) 43% 66%, #151515 67% 100%);
  transform: translateX(-50%) skewY(-8deg);
  box-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

.card-bottle--purple::after {
  background: linear-gradient(135deg, #fff 0 42%, #7b50b7 43% 66%, #151515 67% 100%);
}

.card-bottle--gold::after {
  background: linear-gradient(135deg, #fff 0 42%, #b66b18 43% 66%, #151515 67% 100%);
}

.card-bottle--blue::after {
  background: linear-gradient(135deg, #fff 0 42%, #2477b8 43% 66%, #151515 67% 100%);
}

.card-info {
  padding: 12px 26px 22px;
}

.card-info h3 {
  font-size: 15px;
  margin-bottom: 7px;
}

.card-type,
.card-spec {
  font-size: 13px;
}

.card-link {
  display: inline-flex;
  margin-top: 8px;
  color: #151515;
}

.carousel-arrow {
  border: 0;
  width: 28px;
  background: transparent;
  font-size: 34px;
  color: #222;
}

.carousel-arrow:hover {
  color: var(--pd-gold-dark);
  background: transparent;
}

@media (max-width: 1080px) {
  .description-grid,
  .parameters-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .description-media {
    padding-top: 0;
  }

  .oil-scene {
    max-width: 720px;
    min-height: 240px;
  }
}

@media (max-width: 720px) {
  .product-description {
    padding-top: 32px;
  }

  .feature-list--two-columns,
  .package-options,
  .application-card .application-options {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .specs-table th,
  .specs-table td {
    padding: 11px 12px;
    font-size: 13px;
  }

  .info-card {
    padding: 18px 16px;
  }

  .carousel-track {
    gap: 16px;
  }
}

@media (max-width: 520px) {
  .feature-list--two-columns {
    grid-template-columns: 1fr;
  }

  .description-grid,
  .parameters-grid {
    gap: 24px;
  }

  .oil-scene {
    min-height: 210px;
  }

  .application-card .application-options {
    grid-template-columns: 1fr 1fr;
  }
}

/* ===== 桌面端：产品描述右侧场景图与左侧文案等高 ===== */
@media (min-width: 1081px) {
  .description-grid {
    align-items: stretch;
  }

  .description-media {
    display: flex;
    align-self: stretch;
    padding-top: 0;
  }

  .description-media .oil-scene {
    flex: 1 1 auto;
    height: 100%;
    min-height: 0;
    aspect-ratio: auto;
  }
}