/* 移动端优化 */
@media (max-width: 768px) {
  /* 指标优化 */
  .metric-card {
    padding: 1rem 0.75rem;
    font-size: 0.9rem;
  }

  /* 面包屑响应 */
  .breadcrumb {
    font-size: 0.85rem;
    padding: 0.5rem 0;
  }

  .breadcrumb a {
    padding: 0.25rem 0.5rem;
  }

  /* 分享按钮优化 */
  [data-share-btn] {
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  /* 网格响应 */
  .tools-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  /* 底部空间 */
  body {
    padding-bottom: 70px;
  }

  /* 固定底部导航 */
  .bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    border-top: 1px solid #e5e7eb;
    z-index: 40;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
    padding: 0.5rem;
  }

  .bottom-nav-item {
    padding: 0.75rem 0.5rem;
    text-align: center;
    font-size: 0.75rem;
    min-height: 44px;
    cursor: pointer;
    border-radius: 0.5rem;
    transition: all 0.2s;
  }

  .bottom-nav-item:active {
    background: #f3f4f6;
  }
}

/* 桌面端隐藏底部导航 */
@media (min-width: 769px) {
  .bottom-nav {
    display: none;
  }
}