背景表格，用CSS怎么可以变成细边框表格，求大神指教
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<title>Document</title>
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<table border="1" cellpadding="10">
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<td rowspan="5">表格</td>
<td rowspan="3">表格</td>
<td rowspan="2">表格</td>
<th colspan="3">表格</th>
<td>表格</td>
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<td rowspan="2">表格</td>
<th colspan="2">表格</th>
<td>表格</td>
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<tr>
<td>表格</td>
<th colspan="2">表格</th>
<td>表格</td>
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<tr>
<td>表格</td>
<td>表格</td>
<td>表格</td>
<td>表格</td>
<th colspan="2">表格</th>
</tr>
<tr>
<td>表格</td>
<td>表格</td>
<td>表格</td>
<td>表格</td>
<th rowspan="2">表格</th>
<th rowspan="2">表格</th>
</tr>
<tr>
<td>表格</td>
<td>表格</td>
<td>表格</td>
<td>表格</td>
<td>表格</td>
</tr>
<tr>
<td>表格</td>
<td>表格</td>
<td>表格</td>
<td>表格</td>
<td>表格</td>
<td>表格</td>
<td>表格</td>
</tr>
</table>
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