/* ========================================
   产品详情页样式
   ======================================== */

/* ========================================
   产品主要信息区
   ======================================== */
.product-detail-section {
  padding: var(--spacing-3xl) var(--spacing-lg);
  background-color: var(--color-white);
}

.product-detail-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: start;
}

.product-detail-section figure,
.product-detail-section img,
.product-tabs-section figure,
.product-tabs-section img,
.related-products-section figure,
.related-products-section img,
.product-detail-projects-section figure,
.product-detail-projects-section img,
.product-detail-news-section figure,
.product-detail-news-section img {
  max-width: 100% !important;
}

/* ========================================
   左侧：产品图片
   ======================================== */
.product-images {
  position: sticky;
  top: 100px;
}

.product-images-wrapper {
  display: flex;
  gap: var(--spacing-md);
  align-items: flex-start;
}

/* 左侧缩略图列 */
.thumbnail-column {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  width: 100px;
  flex-shrink: 0;
}

.thumbnail-list-vertical {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-height: 480px;
  overflow: hidden;
  transition: transform 0.3s ease;
}

.thumbnail-item {
  width: 100px;
  height: 100px;
  background-color: #f5f5f5;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  border: 3px solid transparent;
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.thumbnail-item:hover {
  border-color: var(--color-secondary);
}

.thumbnail-item.active {
  border-color: var(--color-accent);
}

.thumbnail-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 缩略图箭头 */
.thumbnail-arrow {
  width: 100%;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-white);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-sm);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all 0.3s ease;
}

.thumbnail-arrow:hover {
  background-color: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-accent);
}

/* 右侧主图 */
.main-image {
  flex: 1;
  width: 100%;
  aspect-ratio: 1;
  background-color: #f5f5f5;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.main-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ========================================
   右侧：产品信息
   ======================================== */
.product-detail-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.product-detail-category-badge {
  display: inline-block;
  align-self: flex-start;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: rgba(247, 198, 0, 0.15);
  border-radius: var(--radius-sm);
}

.product-detail-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  line-height: var(--line-height-tight);
  margin: 0;
}

.product-detail-short-desc {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  line-height: var(--line-height-relaxed);
  margin: 0;
}

/* 产品特点 */
.product-detail-features {
  padding: var(--spacing-xl);
  background-color: rgba(2, 59, 74, 0.03);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--color-accent);
}

.product-detail-features-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin: 0 0 var(--spacing-md) 0;
}

.product-detail-features-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.product-detail-features-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  font-size: var(--font-size-base);
  color: var(--color-text-dark);
  line-height: var(--line-height-normal);
}

.product-detail-features-list i {
  color: var(--color-secondary);
  font-size: var(--font-size-base);
  margin-top: 4px;
  flex-shrink: 0;
}

/* 询盘按钮 */
.inquiry-btn {
  width: 100%;
  justify-content: center;
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--font-size-lg);
}

/* 证书图标 */
.product-detail-certificates {
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(2, 59, 74, 0.1);
}

.product-detail-certificates-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-light);
  margin: 0 0 var(--spacing-md) 0;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.product-detail-certificates-list {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.product-detail-certificate-item {
  width: 80px;
  height: 80px;
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(2, 59, 74, 0.1);
}

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

/* ========================================
   产品详细信息Tab区域
   ======================================== */
.product-tabs-section {
  padding: var(--spacing-3xl) var(--spacing-lg);
  background-color: #f8f9fa;
}

.product-tabs-layout {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-2xl);
}

.product-tabs-container {
  flex: 1 1 0;
  min-width: 0;
}

/* 侧边询盘区域 */
.product-tabs-layout .inquiry-sidebar {
  width: 320px;
  flex-shrink: 0;
  position: sticky;
  top: 100px;
}

.inquiry-box {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-lg);
}

.inquiry-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
}

.inquiry-subtitle {
  font-size: var(--font-size-base);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-xl);
  line-height: var(--line-height-normal);
}

.inquiry-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.inquiry-form .form-group {
  display: flex;
  flex-direction: column;
}

.inquiry-form .form-input,
.inquiry-form .form-textarea {
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  padding: var(--spacing-md);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  background-color: var(--color-white);
  color: var(--color-text-dark);
  transition: all 0.3s ease;
}

.inquiry-form .wpcf7-form-control-wrap {
  display: block;
  width: 100%;
  max-width: 100%;
}

.inquiry-form .form-input:focus,
.inquiry-form .form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(247, 198, 0, 0.2);
}

.inquiry-form .form-textarea {
  resize: vertical;
  min-height: 120px;
}

.inquiry-form .form-submit {
  width: 100%;
  justify-content: center;
  margin-top: var(--spacing-md);
  background-color: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-accent);
  font-weight: var(--font-weight-bold);
}

.inquiry-form .form-submit:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.inquiry-form .form-submit i {
  transition: transform 0.3s ease;
}

.inquiry-form .form-submit:hover i {
  transform: translateX(5px);
}

.inquiry-box-product-detail .wpcf7-not-valid-tip {
  color: var(--color-accent) !important;
}

.inquiry-box-product-detail .wpcf7-response-output {
  color: var(--color-white) !important;
}

.inquiry-box figure,
.inquiry-box img {
  max-width: 100% !important;
}

/* Tab导航 */
.tabs-nav {
  display: flex;
  gap: var(--spacing-md);
  border-bottom: 2px solid rgba(2, 59, 74, 0.1);
  margin-bottom: var(--spacing-2xl);
  flex-wrap: wrap;
}

.tab-btn {
  padding: var(--spacing-md) var(--spacing-xl);
  font-family: var(--font-primary);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-light);
  background-color: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  bottom: -2px;
}

.tab-btn:hover {
  color: var(--color-primary);
}

.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
}

/* Tab内容 */
.tabs-content {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-3xl);
  box-shadow: var(--shadow-sm);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

.tab-content-text {
  font-size: var(--font-size-base);
  line-height: 1.8;
  color: var(--color-text-dark);
}

.tab-content-text h2 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 3px solid var(--color-accent);
  line-height: var(--line-height-tight);
}

.tab-content-text h2:first-child {
  margin-top: 0;
}

.tab-content-text h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-tight);
}

.tab-content-text h4 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.tab-content-text p {
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
}

.tab-content-text p:last-child {
  margin-bottom: 0;
}

.tab-content-text ul,
.tab-content-text ol {
  margin: var(--spacing-lg) 0;
  padding-left: var(--spacing-2xl);
  line-height: 1.8;
}

.tab-content-text ul li,
.tab-content-text ol li {
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-xs);
}

.tab-content-text ul li:last-child,
.tab-content-text ol li:last-child {
  margin-bottom: 0;
}

.tab-content-text strong {
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
}

.tab-content-text img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  margin: var(--spacing-2xl) auto;
  box-shadow: var(--shadow-md);
  display: block;
}

.table-scroll-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: var(--spacing-2xl) 0;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.tab-content-text table {
  width: 100%;
  border-collapse: collapse;
  margin: 0;
  font-size: var(--font-size-base);
  box-shadow: none;
  border-radius: 0;
  overflow: hidden;
}

.tab-content-text table th,
.tab-content-text table td {
  padding: var(--spacing-md) var(--spacing-lg);
  border: 1px solid rgba(2, 59, 74, 0.1);
  text-align: left;
  line-height: 1.6;
}

.tab-content-text table th {
  background-color: var(--color-primary);
  color: var(--color-white);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tab-content-text table tbody tr {
  transition: background-color 0.2s ease;
}

.tab-content-text table tbody tr:nth-child(even) {
  background-color: rgba(2, 59, 74, 0.02);
}

.tab-content-text table tbody tr:hover {
  background-color: rgba(247, 198, 0, 0.1);
}

.tab-content-text blockquote {
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-lg) var(--spacing-xl);
  border-left: 4px solid var(--color-accent);
  background-color: rgba(247, 198, 0, 0.05);
  border-radius: var(--radius-md);
  font-style: italic;
  color: var(--color-text-dark);
}

.tab-content-text a {
  color: var(--color-accent);
  text-decoration: underline;
  transition: color 0.3s ease;
}

.tab-content-text a:hover {
  color: var(--color-primary);
}

/* FAQ手风琴 */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.faq-item {
  background-color: var(--color-white);
  border: 2px solid rgba(2, 59, 74, 0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: var(--color-accent);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) var(--spacing-xl);
  background-color: transparent;
  border: none;
  font-family: var(--font-primary);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  text-align: left;
  cursor: pointer;
  transition: all 0.3s ease;
}

.faq-question:hover {
  background-color: rgba(247, 198, 0, 0.05);
}

.faq-question i {
  font-size: var(--font-size-base);
  color: var(--color-accent);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: var(--spacing-md);
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 var(--spacing-xl);
}

.faq-item.active .faq-answer {
  max-height: 1000px;
  padding: var(--spacing-lg) var(--spacing-xl);
}

.faq-answer p {
  margin: 0;
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-dark);
}

.faq-answer-content {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-dark);
}

.faq-answer-content p {
  margin: 0 0 var(--spacing-md) 0;
}

.faq-answer-content p:last-child {
  margin-bottom: 0;
}

.faq-answer-content ul,
.faq-answer-content ol {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-xl);
}

.faq-answer-content li {
  margin-bottom: var(--spacing-xs);
}

.faq-answer-content strong {
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
}

/* ========================================
   相关产品
   ======================================== */
.related-products-section {
  padding: var(--spacing-3xl) var(--spacing-lg);
}

.related-products-container {
  max-width: 1440px;
  margin: 0 auto;
  padding-left: var(--spacing-xl);
  padding-right: var(--spacing-xl);
}

.related-products-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-2xl);
  text-align: center;
  justify-content: center;
}

.related-products-title i {
  color: var(--color-accent);
  font-size: var(--font-size-2xl);
}

.related-products-slider-wrapper {
  position: relative;
  padding: 0 60px;
}

.related-products-slider {
  display: flex;
  gap: var(--spacing-lg);
  overflow-x: hidden;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x mandatory;
}

.product-detail-projects-section {
  padding: var(--spacing-3xl) var(--spacing-lg);
  background-color: var(--color-white);
}

.product-detail-projects-container {
  max-width: 1440px;
  margin: 0 auto;
}

.product-detail-projects-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin: 0 0 var(--spacing-2xl);
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

.product-detail-projects-title i {
  color: var(--color-accent);
}

.product-detail-projects-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--spacing-xl);
}

.product-detail-project-card {
  background-color: var(--color-white);
  border: 1px solid rgba(2, 59, 74, 0.08);
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.product-detail-project-card:hover {
  transform: translateY(-4px);
  border-color: rgba(2, 59, 74, 0.18);
}

.product-detail-project-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.product-detail-project-image {
  aspect-ratio: 4 / 3;
  background-color: #eef2f6;
  overflow: hidden;
}

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

.product-detail-project-content {
  padding: var(--spacing-lg);
}

.product-detail-project-card-title {
  margin: 0;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: 1.35;
  color: var(--color-primary);
}

.product-card {
  scroll-snap-align: start;
}

.product-card {
  flex: 0 0 calc((100% - 96px) / 4);
  min-width: 250px;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.product-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.product-image {
  width: 100%;
  height: 280px;
  overflow: hidden;
  background-color: #f5f5f5;
  position: relative;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.product-card:hover .product-image img {
  transform: scale(1.1);
}

.product-info {
  padding: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.product-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  line-height: var(--line-height-normal);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 3em;
}

.product-view-more {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-accent);
  margin-top: var(--spacing-sm);
  transition: gap 0.3s ease;
}

.product-card:hover .product-view-more {
  gap: var(--spacing-md);
}

.product-view-more i {
  font-size: var(--font-size-xs);
  transition: transform 0.3s ease;
}

.product-card:hover .product-view-more i {
  transform: translateX(5px);
}

/* 轮播按钮 */
.slider-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-white);
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  color: var(--color-primary);
  font-size: var(--font-size-xl);
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.slider-btn:hover {
  background-color: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-accent);
  transform: translateY(-50%) scale(1.1);
}

.slider-btn-prev {
  left: 0;
}

.slider-btn-next {
  right: 0;
}

/* ========================================
   详情页相关文章（首页新闻卡片样式）
   ======================================== */
.product-detail-news-section {
  padding: var(--spacing-3xl) var(--spacing-lg);
  background-color: var(--color-white);
}

.product-detail-news-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

.product-detail-news-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-2xl);
}

.product-detail-news-title i {
  color: var(--color-accent);
  font-size: var(--font-size-2xl);
}

.product-detail-news-section .news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.product-detail-news-section .news-card {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}

.product-detail-news-section .news-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

.product-detail-news-section .news-image {
  width: 100%;
  height: 250px;
  overflow: hidden;
  position: relative;
}

.product-detail-news-section .news-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-detail-news-section .news-card:hover .news-image img {
  transform: scale(1.1);
}

.product-detail-news-section .news-category {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  background-color: var(--color-secondary);
  color: var(--color-white);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
}

.product-detail-news-section .news-content {
  padding: var(--spacing-xl);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-detail-news-section .news-meta {
  display: flex;
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.product-detail-news-section .news-date {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.product-detail-news-section .news-date i {
  color: var(--color-accent);
}

.product-detail-news-section .news-card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-md);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

.product-detail-news-section .news-excerpt {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  line-height: var(--line-height-relaxed);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ========================================
   相关文章
   ======================================== */
.related-articles-section {
  padding: var(--spacing-3xl) var(--spacing-lg);
  background-color: var(--color-white);
}

.related-articles-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

.related-articles-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-2xl);
  text-align: center;
}

.related-articles-title i {
  color: var(--color-accent);
  font-size: var(--font-size-2xl);
}

.related-articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.related-article-card {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}

.related-article-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.related-article-image {
  width: 100%;
  height: 230px;
  overflow: hidden;
  position: relative;
}

.related-article-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.related-article-card:hover .related-article-image img {
  transform: scale(1.08);
}

.related-article-category {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  background-color: var(--color-secondary);
  color: var(--color-white);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
}

.related-article-content {
  padding: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  flex: 1;
}

.related-article-date {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
}

.related-article-date i {
  color: var(--color-accent);
}

.related-article-card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  line-height: var(--line-height-tight);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-article-excerpt {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  line-height: var(--line-height-relaxed);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.related-article-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-accent);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  transition: gap 0.3s ease;
}

.related-article-card:hover .related-article-link {
  gap: var(--spacing-md);
}

/* ========================================
   询盘弹窗
   ======================================== */
.inquiry-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.inquiry-modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(2, 59, 74, 0.8);
  backdrop-filter: blur(5px);
}

.modal-content {
  position: relative;
  z-index: 10000;
  width: 90%;
  max-width: 600px;
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-3xl);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  transform: scale(0.9);
  transition: transform 0.3s ease;
  max-height: 90vh;
  overflow-y: auto;
}

.inquiry-modal.active .modal-content {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  border: none;
  color: var(--color-text-light);
  font-size: var(--font-size-xl);
  cursor: pointer;
  border-radius: 50%;
  transition: all 0.3s ease;
}

.modal-close:hover {
  background-color: rgba(2, 59, 74, 0.1);
  color: var(--color-primary);
  transform: rotate(90deg);
}

.modal-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin: 0 0 var(--spacing-sm) 0;
}

.modal-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  margin: 0 0 var(--spacing-2xl) 0;
}

.inquiry-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.inquiry-form .form-group {
  display: flex;
  flex-direction: column;
}

.inquiry-form .form-input,
.inquiry-form .form-textarea {
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  padding: var(--spacing-md);
  border: 2px solid rgba(2, 59, 74, 0.2);
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  color: var(--color-text-dark);
  transition: all 0.3s ease;
}

.inquiry-form .form-input:focus,
.inquiry-form .form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(247, 198, 0, 0.1);
}

.inquiry-form .form-textarea {
  resize: vertical;
  min-height: 120px;
}

.inquiry-form .form-submit {
  width: 100%;
  justify-content: center;
  margin-top: var(--spacing-md);
}

/* ========================================
   响应式设计
   ======================================== */

/* 平板设备 */
@media (max-width: 1024px) {
  .product-detail-container {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .product-tabs-layout {
    flex-direction: column;
  }

  .product-tabs-layout .inquiry-sidebar {
    width: 100%;
    position: static;
  }

  .product-detail-projects-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  
  .product-images {
    position: static;
  }
  
  .product-images-wrapper {
    flex-direction: column;
  }
  
  .thumbnail-column {
    flex-direction: row;
    width: 100%;
    order: 2;
  }
  
  .thumbnail-list-vertical {
    flex-direction: row;
    max-height: none;
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
  }
  
  .thumbnail-arrow {
    display: none;
  }
  
  .main-image {
    order: 1;
    margin-bottom: var(--spacing-md);
  }
  
  .product-detail-title {
    font-size: var(--font-size-3xl);
  }
  
  .product-card {
    flex: 0 0 calc((100% - 72px) / 3);
  }
  
  .slider-btn {
    width: 45px;
    height: 45px;
    font-size: var(--font-size-lg);
  }

  .product-detail-news-section .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .related-articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 移动设备 */
@media (max-width: 768px) {
  .product-detail-section,
  .product-tabs-section,
  .related-products-section,
  .product-detail-news-section,
  .product-detail-projects-section,
  .related-articles-section {
    padding: var(--spacing-2xl) var(--spacing-md);
  }
  
  .product-detail-container,
  .product-tabs-container,
  .product-tabs-layout,
  .related-products-container,
  .product-detail-projects-container,
  .product-detail-news-container,
  .related-articles-container {
    padding: 0;
  }

  .product-detail-projects-title {
    font-size: var(--font-size-2xl);
  }

  .product-detail-projects-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .product-tabs-container {
    max-width: 100%;
    width: 100%;
  }
  
  .product-detail-title {
    font-size: var(--font-size-2xl);
  }
  
  .product-detail-short-desc {
    font-size: var(--font-size-base);
  }
  
  .thumbnail-column {
    gap: var(--spacing-xs);
  }
  
  .thumbnail-item {
    width: 80px;
    height: 80px;
  }
  
  .thumbnail-list {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .tabs-nav {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--color-accent) rgba(2, 59, 74, 0.1);
    padding-bottom: var(--spacing-sm);
  }
  .tabs-nav::-webkit-scrollbar {
    height: 4px;
  }
  .tabs-nav::-webkit-scrollbar-track {
    background: rgba(2, 59, 74, 0.1);
    border-radius: 2px;
  }
  .tabs-nav::-webkit-scrollbar-thumb {
    background: var(--color-accent);
    border-radius: 2px;
  }
  
  .tab-btn {
    white-space: nowrap;
    font-size: var(--font-size-base);
    padding: var(--spacing-sm) var(--spacing-lg);
  }
  
  .tabs-content {
    padding: var(--spacing-xl);
  }
  
  .tab-content-text {
    font-size: var(--font-size-sm);
  }
  
  .tab-content-text h2 {
    font-size: var(--font-size-xl);
    margin-top: var(--spacing-xl);
  }
  
  .tab-content-text h3 {
    font-size: var(--font-size-lg);
  }
  
  .tab-content-text table {
    font-size: var(--font-size-sm);
  }
  
  .tab-content-text table th,
  .tab-content-text table td {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .related-products-slider-wrapper {
    padding: 0;
  }
  
  .related-products-slider {
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding: 0 var(--spacing-md);
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
  }
  
  .related-products-slider::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
  }
  
  .product-card {
    flex: 0 0 calc(100% - 32px);
    scroll-snap-align: center;
  }
  
  .slider-btn {
    display: none;
  }
  
  .related-products-title {
    font-size: var(--font-size-2xl);
  }

  .product-detail-news-title {
    font-size: var(--font-size-2xl);
  }

  .product-detail-news-section .news-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .product-detail-news-section .news-content {
    padding: var(--spacing-lg);
  }

  .product-detail-news-section .news-card-title {
    font-size: var(--font-size-lg);
  }

  .related-articles-title {
    font-size: var(--font-size-2xl);
  }

  .related-articles-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .related-article-content {
    padding: var(--spacing-lg);
  }

  .related-article-card-title {
    font-size: var(--font-size-lg);
  }
  
  .modal-content {
    padding: var(--spacing-2xl);
  }
  
  .modal-title {
    font-size: var(--font-size-2xl);
  }
}

/* 小屏手机 */
@media (max-width: 480px) {
  .product-detail-certificates-list {
    justify-content: center;
  }
  
  .related-products-title {
    font-size: var(--font-size-xl);
  }

  .product-detail-news-title {
    font-size: var(--font-size-xl);
  }

  .related-articles-title {
    font-size: var(--font-size-xl);
  }
  
  .product-card {
    flex: 0 0 calc(100% - 32px);
    min-width: auto;
  }
  
  .product-image {
    height: 220px;
  }
}