* { margin: 0; padding: 0; box-sizing: border-box; }
    body { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif; color: #1a1a2e; background: #f5f6fa; min-height: 100vh; display: flex; flex-direction: column; }

    /* 导航栏 - 与首页统一 */
    .navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 0 60px; display: flex; justify-content: space-between; align-items: center; transition: all 0.3s; height: 70px; background: #fff; box-shadow: 0 2px 20px rgba(0,0,0,0.08); }
    .nav-left { display: flex; align-items: center; gap: 40px; }
    .nav-logo { font-size: 22px; font-weight: 800; color: #C8102E; text-decoration: none; display: flex; align-items: center; gap: 10px; }
    .nav-logo-icon { font-size: 28px; }
    .nav-links { display: flex; gap: 8px; list-style: none; }
    .nav-links a { color: #555; text-decoration: none; font-size: 15px; padding: 8px 16px; border-radius: 8px; transition: all 0.3s; font-weight: 500; }
    .nav-links a:hover { color: #C8102E; background: rgba(200,16,46,0.06); }
    .nav-links a.active { color: #C8102E; background: rgba(200,16,46,0.08); }
    .nav-right { display: flex; align-items: center; gap: 16px; }
    .nav-phone { display: flex; align-items: center; gap: 8px; color: #333; text-decoration: none; font-size: 15px; font-weight: 600; padding: 8px 16px; border-radius: 8px; transition: all 0.3s; }
    .nav-phone:hover { background: #f5f5f5; }
    .nav-phone-icon { font-size: 18px; }
    .nav-btn { background: #C8102E; color: #fff; padding: 10px 24px; border-radius: 8px; text-decoration: none; font-size: 14px; font-weight: 600; transition: all 0.3s; box-shadow: 0 4px 12px rgba(200,16,46,0.3); }
    .nav-btn:hover { background: #a00d24; transform: translateY(-1px); }
    .nav-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: #333; width: 44px; height: 44px; align-items: center; justify-content: center; border-radius: 8px; transition: all 0.3s; }
    .nav-toggle:hover { background: #f5f5f5; }
    .nav-mobile { display: none; position: fixed; top: 70px; left: 0; right: 0; background: #fff; box-shadow: 0 4px 20px rgba(0,0,0,0.1); padding: 16px; z-index: 999; border-radius: 0 0 16px 16px; }
    .nav-mobile.active { display: block; animation: slideDown 0.3s ease; }
    @keyframes slideDown { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }
    .nav-mobile a { display: flex; align-items: center; gap: 12px; padding: 14px 16px; color: #333; text-decoration: none; font-size: 16px; border-radius: 10px; transition: all 0.2s; }
    .nav-mobile a:hover { background: #f5f5f5; }
    .nav-mobile a.nav-mobile-phone { color: #C8102E; font-weight: 600; margin-top: 8px; background: #fff5f5; }

    /* 主内容 */
    .main { flex: 1; margin-top: 70px; padding: 40px 60px; max-width: 1200px; margin-left: auto; margin-right: auto; width: 100%; }

    /* 分类标签 */
    .tabs { display: flex; gap: 8px; margin-bottom: 32px; flex-wrap: wrap; }
    .tab { padding: 10px 24px; background: #fff; border-radius: 8px; font-size: 15px; color: #666; cursor: pointer; transition: all 0.3s; border: 1px solid #eee; }
    .tab:hover { color: #C8102E; border-color: #C8102E; }
    .tab.active { background: #C8102E; color: #fff; border-color: #C8102E; }

    /* 文章列表 */
    .article-list { display: flex; flex-direction: column; gap: 16px; }
    .article-card { background: #fff; border-radius: 12px; padding: 28px; transition: all 0.3s; border: 1px solid #f0f0f0; cursor: pointer; text-decoration: none; color: inherit; display: block; }
    .article-card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.08); border-color: #C8102E; }
    .article-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; }
    .article-title { font-size: 20px; font-weight: 600; color: #1a1a2e; line-height: 1.4; flex: 1; }
    .article-tag { padding: 4px 12px; background: #fff5f5; color: #C8102E; border-radius: 6px; font-size: 12px; font-weight: 500; flex-shrink: 0; margin-left: 16px; }
    .article-tag.tag-qa { background: #e8f5e9; color: #4CAF50; }
    .article-tag.tag-announcement { background: #fff3e0; color: #FF9800; }
    .article-summary { font-size: 15px; color: #666; line-height: 1.6; margin-bottom: 16px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .article-meta { display: flex; gap: 20px; color: #999; font-size: 13px; }
    .article-meta span { display: flex; align-items: center; gap: 4px; }

    /* 加载状态 */
    .loading { text-align: center; padding: 60px; color: #999; }
    .loading-spinner { width: 40px; height: 40px; border: 3px solid #eee; border-top-color: #C8102E; border-radius: 50%; animation: spin 0.8s linear infinite; margin: 0 auto 16px; }
    @keyframes spin { to { transform: rotate(360deg); } }

    /* 空状态 */
    .empty { text-align: center; padding: 80px; color: #999; }
    .empty-icon { font-size: 64px; margin-bottom: 16px; }
    .empty-text { font-size: 18px; }

    /* 分页 */
    .pagination { display: flex; justify-content: center; gap: 8px; margin-top: 40px; }
    .page-btn { padding: 10px 16px; background: #fff; border: 1px solid #eee; border-radius: 8px; cursor: pointer; transition: all 0.3s; font-size: 14px; }
    .page-btn:hover { border-color: #C8102E; color: #C8102E; }
    .page-btn.active { background: #C8102E; color: #fff; border-color: #C8102E; }
    .page-btn:disabled { opacity: 0.5; cursor: not-allowed; }

    /* 页脚 - 与首页统一 */
    .footer { padding: 60px; background: #1a1a2e; color: #fff; margin-top: auto; }
    .footer-content { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
    .footer-brand h3 { font-size: 24px; color: #C8102E; margin-bottom: 16px; }
    .footer-brand p { font-size: 14px; color: rgba(255,255,255,0.6); line-height: 1.8; }
    .footer-col h4 { font-size: 16px; margin-bottom: 16px; }
    .footer-col ul { list-style: none; }
    .footer-col li { margin-bottom: 10px; }
    .footer-col a { color: rgba(255,255,255,0.6); text-decoration: none; font-size: 14px; transition: color 0.3s; }
    .footer-col a:hover { color: #C8102E; }
    .footer-bottom { max-width: 1200px; margin: 40px auto 0; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.1); text-align: center; font-size: 13px; color: rgba(255,255,255,0.4); }

    /* 响应式 - 平板 */
    @media (max-width: 1024px) {
      .navbar { padding: 0 30px; }
      .nav-links { gap: 4px; }
      .nav-links a { padding: 8px 12px; font-size: 14px; }
      .main { padding: 30px 30px; }
    }

    /* 响应式 - 手机 */
    @media (max-width: 768px) {
      .navbar { padding: 0 16px; }
      .nav-links { display: none; }
      .nav-right { display: none; }
      .nav-toggle { display: flex; }
      .main { padding: 20px 16px; }
      .article-card { padding: 20px; }
      .article-title { font-size: 17px; }
      .article-summary { font-size: 14px; }
      .footer { padding: 40px 16px; }
      .footer-content { grid-template-columns: 1fr; gap: 30px; }
    }