css表头制作

CSS表头制作方法

固定表头（滚动时保持可见）

thead {
  position: sticky;
  top: 0;
  background-color: #f8f9fa;
  z-index: 100;
}

带阴影效果的表头

th {
  background-color: #4CAF50;
  color: white;
  padding: 12px;
  text-align: left;
  box-shadow: 0 2px 2px -1px rgba(0,0,0,0.4);
}

渐变背景表头

th {
  background: linear-gradient(to bottom, #f5f5f5, #e8e8e8);
  border-bottom: 1px solid #ddd;
  padding: 8px 15px;
}

带悬停效果的表头

th:hover {
  background-color: #ddd;
  transition: background-color 0.3s ease;
}

响应式表头（小屏幕调整）

@media screen and (max-width: 600px) {
  th {
    padding: 4px 8px;
    font-size: 14px;
  }
}

带排序箭头的表头

th.sortable {
  cursor: pointer;
  position: relative;
}

th.sortable:after {
  content: "↑↓";
  margin-left: 5px;
  opacity: 0.3;
}

th.sortable.asc:after {
  content: "↑";
  opacity: 1;
}

th.sortable.desc:after {
  content: "↓";
  opacity: 1;
}