<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="utf-8">
<title>辅助类和响应式工具</title>
<link href="css/bootstrap.min.css" rel="stylesheet">
<style>
.a{
background-color:red ;
color: aquamarine;
border: 1px red solid;
width: 90px;
}
</style>
</head>
<body style="margin:50px;">
<!--
情景文本颜色:
text-muted 柔和灰
text-primary 主要蓝
text-success 成功绿
text-info 信息蓝
text-warning 警告黄
text-danger 危险红
text-default 默认色
情景背景颜色:
bg-primary 主要蓝
bg-success 成功绿
bg-info 信息蓝
bg-warning 警告黄
bg-danger 危险红
bg-default 默认色
-->
<!--
close 关闭按钮
-->
<button class="close"></button>
<p class="text-danger bg-success">世界真奇妙</p>
<!--
caret 三角标
pull-left 左浮动
clearfix 清理浮动
pull-right 右浮动
center-block 块元素居中
-->
<span class="caret"></span>
<div class="pull-left a">小希</div>
<div class="clearfix"></div>
<div class="a">小周</div>
<div class="center-block a">居中</div>
<div class="show">显示</div>
<div class="hidden">隐藏</div>
<!--
屏幕隐藏显示响应
visible-xs-block
hidden-xs
-->
<div class="visible-xs-block a">超小屏幕显示</div>
<div class="clearfix"></div>
<div class="hidden-lg a">超大屏幕隐藏</div>
<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
<script src="http://cdn.bootcss.com/jquery/1.11.1/jquery.min.js"></script>
<!-- Include all compiled plugins (below), or include individual files as needed -->
<script src="js/bootstrap.min.js"></script>
</body>
</html>