hlcX's Blog

<style>
table {
  width: 100%;
  border-collapse: collapse;
}
th, td {
  border: 1px solid black;
  padding: 5px;
}
#fixedHeader {
  position: sticky;
  top: 0;
}
</style>
<table width="100%" border="1" cellspacing="0" cellpadding="2">
    <thead id="fixedHeader">
        <tr>
            <td>标题1</td>
            <td>标题2</td>
        </tr>
        <tr>
            <td colspan="2">合并列</td>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>内容1</td>
            <td>内容2</td>
        </tr>
    </tbody>
</table>