h1和h2可以加大标签的大小
<h1>Example Heading <span class="label label-default">Label</span></h1>
<h2>Example Heading <span class="label label-default">Label</span></h2>
实例
<span class="label label-default">默认标签</span>
<span class="label label-primary">主要标签</span>
<span class="label label-success">成功标签</span>
<span class="label label-info">信息标签</span>
<span class="label label-warning">警告标签</span>
<span class="label label-danger">危险标签</span>
