细线表格如果单纯设置边框，很难保证浏览器兼容。常见的做法是利用 CSS2 的 "border-collapse:collapse;" 属性合并表格边框；并对 table 元素设置左边框和上边框，对 th 和 td 元素设置右边框和下边框。

Markup:

<table>
    <tr>
        <th>table head (row1, col1)</th>
        <th>table head (row1, col2)</th>
        <th>table head (row1, col3)</th>
    </tr>
    <tr>
        <td>table data (row1, col1)</td>
        <td>table data (row1, col2)</td>
        <td>table data (row1, col3)</td>
    </tr>
    <tr>
        <td>table data (row2, col1)</td>
        <td>table data (row2, col2)</td>
        <td>table data (row2, col3)</td>
    </tr>
</table>

CSS:

table{border-collapse:collapse;border-spacing:0;border-left:1px solid #888;border-top:1px solid #888;background:#efefef;}
th,td{border-right:1px solid #888;border-bottom:1px solid #888;padding:5px 15px;}
th{font-weight:bold;background:#ccc;}

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