/* ========== 双Tab布局样式（核心） ========== */
.double-tab-container {
  display: flex;
  gap: 20px;
  min-height: 500px;
}

/* 左侧Tab导航 */
.left-tabs {
  flex: 0 0 220px;
  background: #fff;
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  overflow: hidden;
}

.left-tabs-header {
  padding: 16px 20px;
  background: #0a57c8;
  color: #fff;
  font-size: 18px;
  font-weight: 600;
}

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

.left-tab-item {
  margin: 0;
}

.left-tab-btn {
  display: block;
  width: 100%;
  padding: 14px 20px;
  text-align: left;
  border: none;
  background: transparent;
  color: #333;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.2s;
  border-bottom: 1px solid #f0f0f0;
}

.left-tab-btn:hover {
  background: #f8fafc;
  color: #0a57c8;
}

.left-tab-btn.is-active {
  background: #eaf2ff;
  color: #0a57c8;
  font-weight: 600;
}

.left-tab-btn.is-active::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 14px;
  background: #0a57c8;
  border-radius: 2px;
  margin-right: 12px;
  vertical-align: middle;
}

/* 主内容区域 */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: #fff;
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  overflow: hidden;
}

/* 顶部Tab导航 */
.top-tabs {
  display: flex;
  border-bottom: 2px solid #f0f0f0;
  background: #fafafa;
}

.top-tab-btn {
  position: relative;
  padding: 16px 28px;
  border: none;
  background: transparent;
  color: #666;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.2s;
}

.top-tab-btn:hover {
  color: #0a57c8;
}

.top-tab-btn.is-active {
  color: #0a57c8;
  font-weight: 600;
}

.top-tab-btn.is-active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: #0a57c8;
}

/* 内容区域 */
.content-area {
  flex: 1;
  padding: 24px;
  min-height: 400px;
}

.content-panel {
  display: none;
}

.content-panel.is-active {
  display: block;
}

.content-panel h3 {
  font-size: 20px;
  color: #333;
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid #eee;
}

.content-panel p {
  font-size: 15px;
  line-height: 2;
  color: #666;
  margin: 0 0 12px;
  text-indent: 2em;
}

.content-panel img {
  max-width: 100%;
  height: auto;
  margin: 16px 0;
  border-radius: 4px;
}

/* ========== 响应式设计（核心） ========== */

/* 平板端（768px - 980px） */
@media (max-width: 980px) {
  .double-tab-container {
    flex-direction: column;
    gap: 12px;
  }

  .left-tabs {
    flex: 0 0 auto;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    border: 1px solid #eee;
  }

  .left-tabs-header {
    padding: 14px 16px;
    font-size: 16px;
    background: #fafafa;
    color: #333;
    font-weight: 600;
    border-bottom: 1px solid #eee;
  }

  .left-tab-list {
    display: block;
  }

  .left-tab-item {
    margin: 0;
  }

  .left-tab-btn {
    text-align: left;
    padding: 12px 16px;
    font-size: 15px;
    border-bottom: 1px solid #f5f5f5;
    border-right: none;
  }

  .left-tab-btn:last-child {
    border-bottom: none;
  }

  .left-tab-btn.is-active {
    background: transparent;
    color: #0a57c8;
    font-weight: 600;
  }

  .left-tab-btn.is-active::before {
    display: inline-block;
  }

  .main-content {
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  }

  .top-tab-btn {
    padding: 14px 20px;
    font-size: 15px;
  }

  .content-area {
    padding: 16px;
  }
}

/* 手机端（最大767px） */
@media (max-width: 767px) {
  .double-tab-container {
    flex-direction: column;
    gap: 12px;
  }

  .left-tabs {
    flex: 0 0 auto;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    border: 1px solid #eee;
  }

  .left-tabs-header {
    padding: 12px 14px;
    font-size: 15px;
    background: #fafafa;
    color: #333;
    font-weight: 600;
    border-bottom: 1px solid #eee;
  }

  .left-tab-list {
    display: block;
  }

  .left-tab-item {
    margin: 0;
  }

  .left-tab-btn {
    text-align: left;
    padding: 11px 14px;
    font-size: 14px;
    border-bottom: 1px solid #f5f5f5;
    border-right: none;
  }

  .left-tab-btn:last-child {
    border-bottom: none;
  }

  .left-tab-btn.is-active {
    background: transparent;
    color: #0a57c8;
    font-weight: 600;
  }

  .left-tab-btn.is-active::before {
    display: inline-block;
    width: 3px;
    height: 12px;
  }

  .main-content {
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  }

  .top-tabs {
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    border-bottom: 1px solid #eee;
    background: #fff;
  }

  .top-tab-btn {
    padding: 12px 16px;
    font-size: 14px;
    flex-shrink: 0;
  }

  .top-tab-btn.is-active::after {
    height: 2px;
    background: #0a57c8;
  }

  .content-area {
    padding: 12px;
  }

  .content-panel h3 {
    font-size: 16px;
  }

  .content-panel p {
    font-size: 14px;
    line-height: 1.8;
  }
}




/* ====================================== 新增新增 新增新增PVC产品页面样式（核心） ============================================= */
.pvc-product-container {
  display: flex;
  gap: 24px;
  min-height: 600px;
}

/* 左侧导航 */
.pvc-left-nav {
  flex: 0 0 200px;
  background: #fff;
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  overflow: hidden;
}

.pvc-nav-header {
  padding: 16px 20px;
  background: #fafafa;
  color: #333;
  font-size: 16px;
  font-weight: 600;
  border-bottom: 1px solid #eee;
}

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

.pvc-nav-list li {
  margin: 0;
}

.pvc-nav-link {
  display: block;
  width: 100%;
  padding: 14px 20px;
  text-align: left;
  color: #666;
  font-size: 14px;
  text-decoration: none;
  transition: all 0.2s;
  border-bottom: 1px solid #f5f5f5;
}

.pvc-nav-link:hover {
  background: #f8fafc;
  color: #0a57c8;
}

.pvc-nav-link.is-active {
  color: #0a57c8;
  font-weight: 600;
  background: #eaf2ff;
}

.pvc-nav-link.is-active::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 14px;
  background: #0a57c8;
  border-radius: 2px;
  margin-right: 12px;
  vertical-align: middle;
}

/* 右侧产品展示区 */
.pvc-product-area {
  flex: 1;
  background: #fff;
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  padding: 24px;
}

/* 产品网格 */
.pvc-product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* 产品卡片 */
.pvc-product-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px;
  border: 1px solid #eee;
  border-radius: 4px;
  transition: all 0.2s;
  text-decoration: none;
  color: inherit;
}

.pvc-product-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  border-color: #0a57c8;
}

/* 产品图片容器 */
.pvc-product-img-wrap {
  width: 100%;
  aspect-ratio: 1; 
  background: #e6f0fa;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: 12px;
}

.pvc-product-img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* 产品名称 */
.pvc-product-name {
  font-size: 14px;
  color: #333;
  margin: 0 0 12px;
  font-weight: normal;
}

/* 查看详情按钮 */
.pvc-product-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 38px;
  padding: 0 20px;
  background: #0a57c8;
  color: #fff;
  font-size: 14px;
  text-decoration: none;
  border-radius: 4px;
  transition: all 0.2s;
  cursor: pointer;
}

.pvc-product-card:hover .pvc-product-btn {
  background: #0844a4;
}

/* ========== PVC产品页面响应式设计 ========== */

/* 平板端（768px - 980px） */
@media (max-width: 980px) {
  .pvc-product-container {
    flex-direction: column;
    gap: 16px;
  }

  .pvc-left-nav {
    flex: 0 0 auto;
  }

  .pvc-nav-link {
    padding: 12px 16px;
    font-size: 14px;
  }

  .pvc-product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .pvc-product-area {
    padding: 16px;
  }
}

/* 手机端（最大767px） */
@media (max-width: 767px) {
  .pvc-product-container {
    flex-direction: column;
    gap: 12px;
  }

  .pvc-left-nav {
    flex: 0 0 auto;
  }

  .pvc-nav-header {
    padding: 12px 14px;
    font-size: 15px;
  }

  .pvc-nav-link {
    padding: 11px 14px;
    font-size: 13px;
  }

  .pvc-product-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .pvc-product-area {
    padding: 12px;
  }

  .pvc-product-card {
    padding: 12px;
  }

  .pvc-product-name {
    font-size: 13px;
  }

  .pvc-product-btn {
    height: 34px;
    font-size: 13px;
  }
}