x
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<style>
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table {
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border: 2px solid #555;
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border-collapse: collapse;
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font: 16px "Lucida Grande", "Helvetica", "Arial", sans-serif;
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}
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th, td {
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border: 1px solid #bbb;
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padding: 2px 8px 0;
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text-align: left;
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}
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thead > tr > th {
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background-color: #cce;
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font-size: 18px;
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border-bottom: 2px solid #999;
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}
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</style>
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<table>
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<thead>
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<tr>
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<th>学生编号</th>