<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Bootstrap 实例 - 响应式实用工具</title>
<link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container" style="padding: 40px;">
<div class="row visible-on">
<div class="col-xs-6 col-sm-3" style="background-color: #dedef8;
box-shadow: inset 1px -1px 1px #444, inset -1px 1px 1px #444;">
<span class="hidden-xs">特别小型</span>
<span class="visible-xs">✔ 在特别小型设备上可见</span>
</div>
<div class="col-xs-6 col-sm-3" style="background-color: #dedef8;
box-shadow: inset 1px -1px 1px #444, inset -1px 1px 1px #444;">
<span class="hidden-sm">小型</span>
<span class="visible-sm">✔ 在小型设备上可见</span>
</div>
<div class="clearfix visible-xs"></div>
<div class="col-xs-6 col-sm-3" style="background-color: #dedef8;
box-shadow: inset 1px -1px 1px #444, inset -1px 1px 1px #444;">
<span class="hidden-md">中型</span>
<span class="visible-md">✔ 在中型设备上可见</span>
</div>
<div class="col-xs-6 col-sm-3" style="background-color: #dedef8;
box-shadow: inset 1px -1px 1px #444, inset -1px 1px 1px #444;">
<span class="hidden-lg">大型</span>
<span class="visible-lg">✔ 在大型设备上可见</span>
</div>
</div>
</div>
</body>
</html>
