/* 新闻页面专用样式 - News Page Styles */
/* 参考产品页面的现代化设计风格 */

/* ===== 基础样式重置 ===== */
.nk-news-header,
.nk-news-details,
.nk-news-list {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* ===== 新闻页面头部 ===== */
.nk-news-header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 60px 0 40px;
  position: relative;
  overflow: hidden;
}

.nk-news-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="%23ffffff" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>') repeat;
  opacity: 0.3;
}

.nk-page-title {
  position: relative;
  z-index: 2;
  text-align: center;
  margin-bottom: 20px;
}

.nk-news-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: #ffffff;
  margin: 0;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.nk-breadcrumb {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: center;
}

.breadcrumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50px;
  padding: 12px 24px;
  margin: 0;
  color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: all 0.3s ease;
}

.breadcrumb a:hover {
  color: #ffffff;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.breadcrumb-item.active {
  color: #ffffff;
  font-weight: 600;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: '›';
  color: rgba(255, 255, 255, 0.6);
  font-weight: bold;
  margin: 0 8px;
}

/* ===== 新闻列表主体 ===== */
.nk-news-list-section {
  padding: 80px 0;
  background: #f8fafc;
  position: relative;
}

.nk-news-list-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(180deg, rgba(102, 126, 234, 0.05) 0%, transparent 100%);
}

.nk-news-list-main {
  position: relative;
  z-index: 2;
}

/* ===== 列表头部信息 ===== */
.nk-list-header {
  background: white;
  padding: 25px 30px;
  border-radius: 16px;
  margin-bottom: 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(102, 126, 234, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
}

.nk-list-count {
  color: #64748b;
  font-weight: 500;
  font-size: 14px;
}

/* ===== 新闻网格 ===== */
.nk-news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 30px;
  margin-bottom: 50px;
}

.nk-news-card {
  background: white;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(102, 126, 234, 0.1);
  transition: all 0.3s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.nk-news-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 50px rgba(102, 126, 234, 0.15);
  border-color: rgba(102, 126, 234, 0.3);
}

.nk-news-image {
  position: relative;
  overflow: hidden;
  height: 220px;
}

.nk-news-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: all 0.4s ease;
}

.nk-news-card:hover .nk-news-image img {
  transform: scale(1.05);
}

.nk-news-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.8), rgba(118, 75, 162, 0.8));
  opacity: 0;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nk-news-card:hover .nk-news-overlay {
  opacity: 1;
}

.nk-news-actions {
  display: flex;
  gap: 10px;
}

.nk-action-btn {
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  text-decoration: none;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.nk-action-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.1);
  color: white;
}

.nk-news-info {
  padding: 25px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.nk-news-category {
  margin-bottom: 15px;
}

.nk-category-badge {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  display: inline-block;
}

.nk-news-name {
  font-size: 1.2rem;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 15px;
  line-height: 1.4;
  flex: 1;
}

.nk-news-name a {
  color: inherit;
  text-decoration: none;
  transition: all 0.3s ease;
}

.nk-news-name a:hover {
  color: #667eea;
}

.nk-news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-top: 15px;
  border-top: 1px solid rgba(102, 126, 234, 0.1);
  font-size: 14px;
  color: #64748b;
}

.nk-news-date {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nk-news-footer {
  margin-top: auto;
}

.nk-btn-detail {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  text-decoration: none;
  border-radius: 25px;
  font-weight: 600;
  font-size: 14px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.nk-btn-detail:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
  color: white;
}

/* ===== 新闻详情页面 ===== */
.nk-news-details {
  padding: 80px 0;
  background: #f8fafc;
  position: relative;
}

.nk-news-details::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(180deg, rgba(102, 126, 234, 0.05) 0%, transparent 100%);
}

.nk-news-main {
  background: white;
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
  position: relative;
  z-index: 2;
  border: 1px solid rgba(102, 126, 234, 0.1);
}

.nk-news-header-info {
  text-align: center;
  margin-bottom: 40px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(102, 126, 234, 0.1);
}

.nk-news-detail-title {
  font-size: 2.2rem;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 20px;
  line-height: 1.3;
}

.nk-news-detail-meta {
  display: flex;
  justify-content: center;
  gap: 30px;
  color: #64748b;
  font-size: 14px;
  flex-wrap: wrap;
}

.nk-meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nk-news-content {
  font-size: 16px;
  line-height: 1.8;
  color: #475569;
}

.nk-news-content img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  margin: 20px 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.nk-news-content p {
  margin-bottom: 20px;
}

.nk-news-content h1,
.nk-news-content h2,
.nk-news-content h3,
.nk-news-content h4,
.nk-news-content h5,
.nk-news-content h6 {
  color: #1e293b;
  font-weight: 600;
  margin: 30px 0 15px;
}

/* ===== 标签和分享 ===== */
.nk-news-tags {
  background: rgba(102, 126, 234, 0.05);
  padding: 25px;
  border-radius: 16px;
  margin: 40px 0;
  border: 1px solid rgba(102, 126, 234, 0.1);
}

.nk-tags-title {
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 15px;
  font-size: 16px;
}

.nk-tag-item {
  display: inline-block;
  background: white;
  color: #667eea;
  padding: 8px 16px;
  border-radius: 20px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  margin: 5px 8px 5px 0;
  border: 1px solid rgba(102, 126, 234, 0.2);
  transition: all 0.3s ease;
}

.nk-tag-item:hover {
  background: #667eea;
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

/* ===== 相关新闻 ===== */
.nk-related-news {
  background: white;
  border-radius: 16px;
  padding: 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(102, 126, 234, 0.1);
  margin-top: 40px;
}

.nk-related-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 25px;
  position: relative;
  padding-left: 20px;
}

.nk-related-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 24px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-radius: 2px;
}

.nk-related-item {
  display: flex;
  gap: 15px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(102, 126, 234, 0.1);
  transition: all 0.3s ease;
}

.nk-related-item:last-child {
  border-bottom: none;
}

.nk-related-item:hover {
  background: rgba(102, 126, 234, 0.03);
  border-radius: 12px;
  padding: 20px 15px;
  margin: 0 -15px;
}

.nk-related-image {
  width: 80px;
  height: 80px;
  border-radius: 12px;
  overflow: hidden;
  flex-shrink: 0;
}

.nk-related-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: all 0.3s ease;
}

.nk-related-item:hover .nk-related-image img {
  transform: scale(1.1);
}

.nk-related-content {
  flex: 1;
}

.nk-related-content h6 {
  font-size: 14px;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 8px;
  line-height: 1.4;
}

.nk-related-content a {
  color: inherit;
  text-decoration: none;
  transition: all 0.3s ease;
}

.nk-related-content a:hover {
  color: #667eea;
}

.nk-related-date {
  font-size: 12px;
  color: #64748b;
  display: flex;
  align-items: center;
  gap: 5px;
}

/* ===== 侧边栏 ===== */
.nk-news-sidebar {
  position: sticky;
  top: 30px;
}

.nk-sidebar-widget {
  background: white;
  border-radius: 16px;
  padding: 30px;
  margin-bottom: 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(102, 126, 234, 0.1);
  transition: all 0.3s ease;
}

.nk-sidebar-widget:hover {
  box-shadow: 0 15px 40px rgba(102, 126, 234, 0.12);
  transform: translateY(-2px);
}

.nk-widget-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 25px;
  position: relative;
  padding-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.nk-widget-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 3px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-radius: 2px;
}

/* ===== 分类导航 ===== */
.nk-category-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nk-category-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: rgba(102, 126, 234, 0.03);
  border-radius: 10px;
  color: #475569;
  text-decoration: none;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.nk-category-item:hover {
  background: rgba(102, 126, 234, 0.1);
  color: #667eea;
  border-color: rgba(102, 126, 234, 0.2);
  transform: translateX(5px);
}

.nk-category-name {
  font-weight: 500;
}

.nk-category-count {
  background: rgba(102, 126, 234, 0.1);
  color: #667eea;
  padding: 4px 8px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.nk-category-item i {
  font-size: 12px;
  opacity: 0.6;
  transition: all 0.3s ease;
}

.nk-category-item:hover i {
  opacity: 1;
  transform: translateX(3px);
}

/* 当前栏目高亮样式 */
.nk-category-item.current,
.nk-category-item.active {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  border-color: #667eea;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
  transform: translateX(5px);
}

.nk-category-item.current .nk-category-count,
.nk-category-item.active .nk-category-count {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

/* ===== 搜索功能 ===== */
.nk-search-form {
  margin-top: 20px;
}

.nk-search-input-group {
  position: relative;
  display: flex;
}

.nk-search-input {
  flex: 1;
  padding: 14px 20px;
  border: 2px solid rgba(102, 126, 234, 0.1);
  border-radius: 25px;
  font-size: 14px;
  transition: all 0.3s ease;
  background: rgba(102, 126, 234, 0.03);
}

.nk-search-input:focus {
  outline: none;
  border-color: #667eea;
  background: white;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.nk-search-btn {
  position: absolute;
  right: 5px;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border: none;
  border-radius: 50%;
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nk-search-btn:hover {
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

/* ===== 分页导航 ===== */
.nk-pagination-wrapper {
  display: flex;
  justify-content: center;
  margin-top: 50px;
}

.nk-pagination {
  display: flex;
  align-items: center;
  gap: 10px;
  background: white;
  padding: 20px 30px;
  border-radius: 50px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(102, 126, 234, 0.1);
}

.nk-page-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: rgba(102, 126, 234, 0.05);
  color: #667eea;
  text-decoration: none;
  border-radius: 25px;
  font-weight: 600;
  font-size: 14px;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.nk-page-btn:hover {
  background: #667eea;
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.nk-page-info {
  padding: 10px 20px;
  color: #64748b;
  font-weight: 500;
  font-size: 14px;
}

/* ===== 空状态 ===== */
.nk-empty-state {
  text-align: center;
  padding: 80px 20px;
  background: white;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(102, 126, 234, 0.1);
}

.nk-empty-icon {
  font-size: 4rem;
  color: #cbd5e1;
  margin-bottom: 20px;
}

.nk-empty-state h3 {
  color: #64748b;
  font-weight: 600;
  margin-bottom: 10px;
}

.nk-empty-state p {
  color: #94a3b8;
  margin: 0;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1200px) {
  .nk-news-grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
  }
}

@media (max-width: 768px) {
  .nk-news-header {
    padding: 40px 0 30px;
  }
  
  .nk-news-title {
    font-size: 2rem;
  }
  
  .nk-news-list-section,
  .nk-news-details {
    padding: 50px 0;
  }
  
  .nk-news-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .nk-news-main {
    padding: 25px;
  }
  
  .nk-news-detail-title {
    font-size: 1.8rem;
  }
  
  .nk-news-detail-meta {
    flex-direction: column;
    gap: 15px;
  }
  
  .nk-sidebar-widget {
    padding: 20px;
  }
  
  .nk-list-header {
    padding: 20px;
    flex-direction: column;
    text-align: center;
  }
  
  .nk-pagination {
    padding: 15px 20px;
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 576px) {
  .nk-news-title {
    font-size: 1.6rem;
  }
  
  .nk-news-detail-title {
    font-size: 1.5rem;
  }
  
  .nk-news-main {
    padding: 20px;
  }
  
  .nk-sidebar-widget {
    padding: 15px;
  }
  
  .nk-related-item {
    flex-direction: column;
    gap: 10px;
  }
  
  .nk-related-image {
    width: 100%;
    height: 150px;
  }
}

/* ... 新闻详情页面单栏布局样式 ... */
.news-header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 60px 0 40px;
  position: relative;
  overflow: hidden;
  color: white;
}

.news-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="%23ffffff" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>') repeat;
  opacity: 0.3;
}

.news-detail-title {
  position: relative;
  z-index: 2;
  text-align: center;
  margin-bottom: 20px;
}

.news-detail-title h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: #ffffff;
  margin: 0;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  line-height: 1.3;
}

.news-detail-meta {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: center;
  gap: 30px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 14px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.news-detail-meta span {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.1);
  padding: 8px 16px;
  border-radius: 20px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.news-detail-section {
  padding: 80px 0;
  background: #f8fafc;
  position: relative;
}

.news-detail-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(180deg, rgba(102, 126, 234, 0.05) 0%, transparent 100%);
}

.news-detail-content {
  position: relative;
  z-index: 2;
}

.news-content-wrapper {
  background: white;
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(102, 126, 234, 0.1);
  margin-bottom: 40px;
  font-size: 16px;
  line-height: 1.8;
  color: #475569;
}

.news-content-wrapper img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  margin: 20px 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  transition: all 0.3s ease;
}

.news-content-wrapper img:hover {
  transform: scale(1.02);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.news-content-wrapper p {
  margin-bottom: 20px;
}

.news-content-wrapper h1,
.news-content-wrapper h2,
.news-content-wrapper h3,
.news-content-wrapper h4,
.news-content-wrapper h5,
.news-content-wrapper h6 {
  color: #1e293b;
  font-weight: 600;
  margin: 30px 0 15px;
}

/* ===== 标签区域 ===== */
.news-tags-section {
  background: white;
  border-radius: 16px;
  padding: 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(102, 126, 234, 0.1);
  margin-bottom: 40px;
}

.news-tags-section h4 {
  font-size: 1.3rem;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.news-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.news-tag {
  display: inline-block;
  background: rgba(102, 126, 234, 0.1);
  color: #667eea;
  padding: 8px 16px;
  border-radius: 20px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid rgba(102, 126, 234, 0.2);
  transition: all 0.3s ease;
}

.news-tag:hover {
  background: #667eea;
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

/* ===== 相关新闻区域 ===== */
.related-news-section {
  background: white;
  border-radius: 16px;
  padding: 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(102, 126, 234, 0.1);
  margin-bottom: 40px;
}

.related-news-section h4 {
  font-size: 1.3rem;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 25px;
  display: flex;
  align-items: center;
  gap: 10px;
  position: relative;
  padding-left: 20px;
}

.related-news-section h4::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 24px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-radius: 2px;
}

.related-news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}

.related-news-item {
  background: rgba(102, 126, 234, 0.03);
  border-radius: 12px;
  padding: 15px;
  border: 1px solid rgba(102, 126, 234, 0.1);
  transition: all 0.3s ease;
}

.related-news-item:hover {
  background: rgba(102, 126, 234, 0.08);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.15);
}

.related-news-image {
  width: 100%;
  height: 120px;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 12px;
}

.related-news-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: all 0.3s ease;
}

.related-news-item:hover .related-news-image img {
  transform: scale(1.05);
}

.related-news-content h6 {
  font-size: 14px;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 8px;
  line-height: 1.4;
}

.related-news-content h6 a {
  color: inherit;
  text-decoration: none;
  transition: all 0.3s ease;
}

.related-news-content h6 a:hover {
  color: #667eea;
}

.related-news-meta {
  font-size: 12px;
  color: #64748b;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.related-news-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ===== 导航按钮 ===== */
.news-navigation {
  background: white;
  border-radius: 16px;
  padding: 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(102, 126, 234, 0.1);
  margin-top: 40px;
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 20px;
  background: rgba(102, 126, 234, 0.05);
  border-radius: 12px;
  text-decoration: none;
  color: #475569;
  transition: all 0.3s ease;
  border: 1px solid rgba(102, 126, 234, 0.1);
  height: 100%;
}

.nav-btn:hover {
  background: rgba(102, 126, 234, 0.1);
  color: #667eea;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.15);
}

.nav-prev {
  justify-content: flex-start;
}

.nav-next {
  justify-content: flex-end;
  text-align: right;
}

.nav-content {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.nav-label {
  font-size: 12px;
  color: #64748b;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.nav-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.3;
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-btn i {
  font-size: 18px;
  color: #667eea;
  transition: all 0.3s ease;
}

.nav-btn:hover i {
  transform: translateX(3px);
}

.nav-prev:hover i {
  transform: translateX(-3px);
}

/* ===== 返回顶部按钮 ===== */
#back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-size: 18px;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
  transition: all 0.3s ease;
  z-index: 1000;
}

#back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
  color: white;
}

#back-to-top::before {
  content: '↑';
  font-weight: bold;
}

/* ===== 响应式设计补充 ===== */
@media (max-width: 768px) {
  .news-detail-title h1 {
    font-size: 2rem;
  }
  
  .news-detail-meta {
    flex-direction: column;
    gap: 15px;
  }
  
  .news-content-wrapper {
    padding: 25px;
  }
  
  .related-news-grid {
    grid-template-columns: 1fr;
  }
  
  .news-navigation .row {
    gap: 15px;
  }
  
  .nav-title {
    max-width: 150px;
  }
}

@media (max-width: 576px) {
  .news-detail-title h1 {
    font-size: 1.6rem;
  }
  
  .news-content-wrapper {
    padding: 20px;
  }
  
  .news-tags-section,
  .related-news-section,
  .news-navigation {
    padding: 20px;
  }
  
  .nav-btn {
    padding: 15px;
    flex-direction: column;
    text-align: center;
  }
  
  .nav-next {
    text-align: center;
  }
  
  .nav-title {
    max-width: 100%;
    white-space: normal;
  }
  
  #back-to-top {
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
  }
}