案例一： 1 <!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<meta name="viewport" content="width=device-width" />
<title>test</title>
<style type="text/css">
@media(max-width:320px){/*让屏幕宽度最大为320px的设备使用该css*/
div#wrapper{
width:320px;height:50px;background-color:green;
color:silver;
}
} @media(min-width:360px) and (max-width:400px){/*让屏幕宽度从360px到400px的设备使用该css*/
div#wrapper{
width:100%;height:100px;background-color:red;
color:white;
}
}
</style>
</head>
<body>
<h1>Media Queries</h1>
<div id="wrapper">
<h2>wrapper</h2>
</div>
</body>
</html>
案例二：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<meta name="viewport" content="width=device-width" />
<title>test</title>
<style type="text/css">
@media(max-width:320px){
div#wrapper{
width:320px;height:50px;background-color:green;
color:silver;
}
} @media(min-width:321px) and (max-width:400px){
div#wrapper{
width:100%;height:100px;background-color:red;
color:white;
}
}
</style>
</head>
<body>
<h1>Media Queries</h1>
<div id="wrapper">
<h2>wrapper</h2>
</div>
</body>
</html>