在html或css中倾斜的对角线？

我想做一个这样的表

是否可以在表格中添加倾斜的对角线边框？

解决方法

基于 CSS3 linear-gradients解决方案,但角度不是硬编码的：

table:nth-of-type(1) td {
  background-image: linear-gradient(
    to top right,white 48%,black,white 52%
  );
}
table:nth-of-type(2) td {
  background-image: linear-gradient(
    to top right,papayawhip calc(50% - 1px),papayawhip calc(50% + 1px)
  );
}
/* for testing */
table {
  border-collapse: collapse;
  margin-top: 1em;
  margin-bottom: 1em;
}
td:nth-child(odd) {
  width: 10em;
}
td:nth-child(even) {
  width: 20em;
}

<table border="1">
  <tbody>
    <tr>
      <td>Narrow</td>
      <td>Wide</td>
    </tr>
    <tr>
      <td>Narrow</td>
      <td>Wide</td>
    </tr>
  </tbody>
</table>
<table border="1">
  <tbody>
    <tr>
      <td>Narrow</td>
      <td>Wide</td>
    </tr>
    <tr>
      <td>Narrow</td>
      <td>Wide</td>
    </tr>
  </tbody>
</table>