基于CSS3线性梯度解决方案，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), black, papayawhip calc(50% + 1px) );}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>
