/* Base styles with mobile-first approach */
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1rem;
    }

    body {
      transition: all 0.3s ease; /* 平滑过渡效果 */
    }

    /* 日间模式默认样式 */
    .page-header {
      background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
      padding: 1.5rem 0;
      margin-bottom: 1.5rem;
    }
    .page-title {
      color: white;
      font-size: 1.75rem; /* Mobile base size */
      font-weight: 700;
      text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
      margin-bottom: 0.75rem;
      letter-spacing: 1px;
      line-height: 1.2;
    }
    .breadcrumb {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 0.5rem;
      font-size: 0.8rem;
    }
    .breadcrumb a {
      color: #fff;
      text-decoration: none;
      padding: 0.25rem 0.5rem;
      border-radius: 0.25rem;
      transition: background-color 0.3s;
    }
    .breadcrumb a:hover {
      background-color: rgba(255, 255, 255, 0.2);
    }
    .breadcrumb span {
      color: #fff;
      opacity: 0.8;
    }

    .image-gallery {
      display: grid;
      grid-template-columns: 1fr; /* Single column on mobile */
      gap: 1rem;
      margin: 1.5rem 0;
    }
    .image-gallery img {
      width: 100%;
      border-radius: 0.5rem;
      transition: transform 0.3s ease;
      cursor: pointer;
    }
    .image-gallery img:hover {
      transform: scale(1.03);
    }

    blockquote {
      margin: 1.5rem 0;
      padding: 1rem;
      background-color: #f8f9fa;
      border-left: 4px solid #3b82f6;
      font-style: italic;
      color: #4b5563;
    }
    blockquote cite {
      display: block;
      margin-top: 0.75rem;
      font-style: normal;
      font-weight: 500;
      color: #64748b;
    }

    .article-meta {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      margin-bottom: 1rem;
      flex-wrap: wrap;
    }
    .article-category {
      background-color: #3b82f6;
      color: white;
      padding: 0.25rem 0.75rem;
      border-radius: 0.25rem;
      font-size: 0.875rem;
    }
    .article-date {
      color: #64748b;
      font-size: 0.875rem;
      display: flex;
      align-items: center;
    }
    .article-date i {
      margin-right: 0.25rem;
    }

    .article-title {
      font-size: 1.5rem; /* Mobile base size */
      margin-bottom: 1rem;
      color: #1f2937;
    }
    .article-author {
      display: flex;
      align-items: center;
      margin-bottom: 1.5rem;
    }
    .author-avatar {
      width: 2rem;
      height: 2rem;
      border-radius: 50%;
      margin-right: 0.5rem;
    }
    .author-name {
      color: #4b5563;
    }

    .lightbox {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0, 0, 0, 0.9);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 1000;
    }
    .lightbox-content {
      position: relative;
      max-width: 95%; /* Slightly more padding on mobile */
      max-height: 85vh;
    }
    .lightbox-content img {
      max-width: 100%;
      max-height: 85vh;
      border: 2px solid white;
    }
    .close-lightbox {
      position: absolute;
      top: -1.5rem;
      right: -1.5rem;
      color: white;
      font-size: 1.5rem;
      cursor: pointer;
    }

    .back-btn {
      display: inline-flex;
      align-items: center;
      padding: 0.5rem 1rem;
      background-color: #f1f5f9;
      color: #334155;
      border-radius: 0.25rem;
      margin: 1.5rem 0;
      transition: all 0.3s;
    }
    .back-btn:hover {
      background-color: #e2e8f0;
    }
    .back-btn i {
      margin-right: 0.5rem;
    }

    .content-wrapper {
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }
    .main-content {
      flex: 1;
      color: #4b5563;
    }
    .video-embed iframe {
      width: 100%;
      height: 200px; /* Mobile base height */
    }
    .article-sidebar {
      flex: 1;
    }
    .share-buttons,
    .related-tags {
      background-color: #f8f9fa;
      padding: 1rem;
      border-radius: 0.5rem;
    }
    .share-buttons h3,
    .related-tags h3 {
      font-size: 1.25rem;
      margin-bottom: 0.75rem;
      color: #1f2937;
    }
    .social-icons {
      display: flex;
      gap: 0.75rem;
    }
    .social-icon {
      color: #3b82f6;
      font-size: 1.25rem;
    }
    .tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
    }
    .tag {
      padding: 0.25rem 0.75rem;
      background-color: #e2e8f0;
      border-radius: 0.25rem;
      text-decoration: none;
      color: #334155;
    }
    .tag:hover {
      background-color: #d1d5db;
    }

    .related-section {
      margin: 2rem 0;
      background-color: #f8f9fa;
      padding: 2rem 0;
    }
    .section-title {
      font-size: 1.5rem;
      margin-bottom: 1rem;
      color: #1f2937;
    }
    .news-grid {
      display: grid;
      grid-template-columns: 1fr; /* Single column on mobile */
      gap: 1rem;
    }
    .news-item {
      background-color: #fff;
      border-radius: 0.5rem;
      overflow: hidden;
      box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }
    .news-image {
      width: 100%;
      height: 150px;
      object-fit: cover;
    }
    .news-content {
      padding: 1rem;
    }
    .news-date {
      color: #64748b;
      font-size: 0.875rem;
    }
    .news-title {
      font-size: 1.25rem;
      margin: 0.5rem 0;
      color: #1f2937;
    }
    .news-description {
      font-size: 0.9rem;
      color: #4b5563;
    }
    .news-read-more {
      color: #3b82f6;
      text-decoration: none;
      font-weight: 500;
    }
    .news-read-more:hover {
      text-decoration: underline;
    }

    /* 夜间模式样式 */
    body.night-mode {
      background-color: #1a1a1a; /* 深色背景 */
      color: #e5e7eb; /* 浅灰文字 */
    }

    body.night-mode .page-header {
      background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%); /* 夜间渐变调整 */
    }

    body.night-mode .page-title,
    body.night-mode .breadcrumb a,
    body.night-mode .breadcrumb span {
      color: #e5e7eb; /* 浅灰文字 */
    }

    body.night-mode .breadcrumb a:hover {
      background-color: rgba(255, 255, 255, 0.1);
    }

    body.night-mode blockquote {
      background-color: #2d2d2d; /* 深灰背景 */
      color: #d1d5db; /* 浅灰文字 */
      border-left-color: #60a5fa; /* 夜间蓝色边框 */
    }

    body.night-mode blockquote cite {
      color: #9ca3af; /* 中灰文字 */
    }

    body.night-mode .article-meta .article-date {
      color: #9ca3af; /* 中灰文字 */
    }

    body.night-mode .article-title,
    body.night-mode .share-buttons h3,
    body.night-mode .related-tags h3,
    body.night-mode .section-title,
    body.night-mode .news-title {
      color: #e5e7eb; /* 浅灰标题 */
    }

    body.night-mode .article-author .author-name,
    body.night-mode .main-content,
    body.night-mode .news-description {
      color: #d1d5db; /* 浅灰文字 */
    }

    body.night-mode .back-btn {
      background-color: #2d2d2d;
      color: #e5e7eb;
    }

    body.night-mode .back-btn:hover {
      background-color: #3f3f3f;
    }

    body.night-mode .share-buttons,
    body.night-mode .related-tags {
      background-color: #2d2d2d; /* 深灰背景 */
    }

    body.night-mode .tag {
      background-color: #374151; /* 深灰标签 */
      color: #e5e7eb;
    }

    body.night-mode .tag:hover {
      background-color: #4b5563;
    }

    body.night-mode .related-section {
      background-color: #252525; /* 稍浅的深灰背景 */
    }

    body.night-mode .news-item {
      background-color: #333333; /* 深灰新闻卡片 */
    }

    body.night-mode .news-date {
      color: #9ca3af; /* 中灰文字 */
    }

    body.night-mode .news-read-more {
      color: #60a5fa; /* 夜间蓝色链接 */
    }

    /* Tablet (min-width: 768px) */
    @media (min-width: 768px) {
      .page-title {
        font-size: 2rem;
      }
      .breadcrumb {
        font-size: 0.9rem;
      }
      .image-gallery {
        grid-template-columns: repeat(2, 1fr); /* Two columns on tablet */
      }
      .article-title {
        font-size: 2rem;
      }
      .author-avatar {
        width: 2.5rem;
        height: 2.5rem;
        margin-right: 0.75rem;
      }
      .content-wrapper {
        flex-direction: row;
      }
      .video-embed iframe {
        height: 300px;
      }
      .news-grid {
        grid-template-columns: repeat(2, 1fr); /* Two columns on tablet */
      }
      .news-image {
        height: 180px;
      }
    }

    /* Desktop (min-width: 1024px) */
    @media (min-width: 1024px) {
      .page-header {
        padding: 2rem 0;
        margin-bottom: 2rem;
      }
      .page-title {
        font-size: 2.5rem;
      }
      .image-gallery {
        grid-template-columns: repeat(2, 1fr);
      }
      .article-sidebar {
        max-width: 300px;
      }
      .video-embed iframe {
        height: 400px;
      }
      .news-grid {
        grid-template-columns: repeat(3, 1fr); /* Three columns on desktop */
      }
      .news-image {
        height: 200px;
      }
    }