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<title>Bootstrap 示例</title>
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<h1>垂直对齐</h1>
<p>使用对齐类更改元素的对齐方式（仅适用于内联、内联块、内联表和表格单元格元素）：</p>
<span class="align-baseline">baseline</span>
<span class="align-top">top</span>
<span class="align-middle">middle</span>
<span class="align-bottom">bottom</span>
<span class="align-text-top">text-top</span>
<span class="align-text-bottom">text-bottom</span>
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