p class="text-muted">...<span style="color: #0000ff"></<span style="color: #800000">p<span style="color: #0000ff">>
<span style="color: #0000ff"><<span style="color: #800000">p <span style="color: #ff0000">class<span style="color: #0000ff">="text-primary"<span style="color: #0000ff">>...<span style="color: #0000ff"></<span style="color: #800000">p<span style="color: #0000ff">>
<span style="color: #0000ff"><<span style="color: #800000">p <span style="color: #ff0000">class<span style="color: #0000ff">="text-success"<span style="color: #0000ff">>...<span style="color: #0000ff"></<span style="color: #800000">p<span style="color: #0000ff">>
<span style="color: #0000ff"><<span style="color: #800000">p <span style="color: #ff0000">class<span style="color: #0000ff">="text-info"<span style="color: #0000ff">>...<span style="color: #0000ff"></<span style="color: #800000">p<span style="color: #0000ff">>
<span style="color: #0000ff"><<span style="color: #800000">p <span style="color: #ff0000">class<span style="color: #0000ff">="text-warning"<span style="color: #0000ff">>...<span style="color: #0000ff"></<span style="color: #800000">p<span style="color: #0000ff">>
<span style="color: #0000ff"><<span style="color: #800000">p <span style="color: #ff0000">class<span style="color: #0000ff">="text-danger"<span style="color: #0000ff">>...<span style="color: #0000ff"></<span style="color: #800000">p<span style="color: #0000ff">><span style="color: #000000">
//背景颜色

<span style="color: #0000ff"><<span style="color: #800000">p <span style="color: #ff0000">class<span style="color: #0000ff">="bg-primary"<span style="color: #0000ff">>...<span style="color: #0000ff"></<span style="color: #800000">p<span style="color: #0000ff">>
<span style="color: #0000ff"><<span style="color: #800000">p <span style="color: #ff0000">class<span style="color: #0000ff">="bg-success"<span style="color: #0000ff">>...<span style="color: #0000ff"></<span style="color: #800000">p<span style="color: #0000ff">>
<span style="color: #0000ff"><<span style="color: #800000">p <span style="color: #ff0000">class<span style="color: #0000ff">="bg-info"<span style="color: #0000ff">>...<span style="color: #0000ff"></<span style="color: #800000">p<span style="color: #0000ff">>
<span style="color: #0000ff"><<span style="color: #800000">p <span style="color: #ff0000">class<span style="color: #0000ff">="bg-warning"<span style="color: #0000ff">>...<span style="color: #0000ff"></<span style="color: #800000">p<span style="color: #0000ff">>
<span style="color: #0000ff"><<span style="color: #800000">p <span style="color: #ff0000">class<span style="color: #0000ff">="bg-danger"<span style="color: #0000ff">>...<span style="color: #0000ff"></<span style="color: #800000">p<span style="color: #0000ff">><span style="color: #000000">
//关闭按钮

<span style="color: #0000ff"><<span style="color: #800000">button <span style="color: #ff0000">type<span style="color: #0000ff">="button"<span style="color: #ff0000"> class<span style="color: #0000ff">="close"<span style="color: #ff0000"> aria-label<span style="color: #0000ff">="Close"<span style="color: #0000ff">><<span style="color: #800000">span <span style="color: #ff0000">aria-hidden<span style="color: #0000ff">="true"<span style="color: #0000ff">><span style="color: #ff0000">&times;<span style="color: #0000ff"></<span style="color: #800000">span<span style="color: #0000ff">></<span style="color: #800000">button<span style="color: #0000ff">><span style="color: #000000">
//下拉三角

<span style="color: #0000ff"><<span style="color: #800000">span <span style="color: #ff0000">class<span style="color: #0000ff">="caret"<span style="color: #0000ff">></<span style="color: #800000">span<span style="color: #0000ff">><span style="color: #000000">
//快速浮动

<span style="color: #0000ff"><<span style="color: #800000">div <span style="color: #ff0000">class<span style="color: #0000ff">="pull-left"<span style="color: #0000ff">>...<span style="color: #0000ff"></<span style="color: #800000">div<span style="color: #0000ff">>
<span style="color: #0000ff"><<span style="color: #800000">div <span style="color: #ff0000">class<span style="color: #0000ff">="pull-right"<span style="color: #0000ff">>...<span style="color: #0000ff"></<span style="color: #800000">div<span style="color: #0000ff">><span style="color: #000000">
//内容块居中

<span style="color: #0000ff"><<span style="color: #800000">div <span style="color: #ff0000">class<span style="color: #0000ff">="center-block"<span style="color: #0000ff">>...<span style="color: #0000ff"></<span style="color: #800000">div<span style="color: #0000ff">><span style="color: #000000">
//清除浮动

<span style="color: #008000">
<span style="color: #0000ff"><<span style="color: #800000">div <span style="color: #ff0000">class<span style="color: #0000ff">="clearfix"<span style="color: #0000ff">>...<span style="color: #0000ff"></<span style="color: #800000">div<span style="color: #0000ff">><span style="color: #000000">
//显示与隐藏

<span style="color: #0000ff"><<span style="color: #800000">div <span style="color: #ff0000">class<span style="color: #0000ff">="show"<span style="color: #0000ff">>...<span style="color: #0000ff"></<span style="color: #800000">div<span style="color: #0000ff">>
<span style="color: #0000ff"><<span style="color: #800000">div <span style="color: #ff0000">class<span style="color: #0000ff">="hidden"<span style="color: #0000ff">>...<span style="color: #0000ff"></<span style="color: #800000">div<span style="color: #0000ff">>