<link media="only screen and (min-device-width : 320px) and (max-device-width : 480px)" href="smartphone.css" type= "text/css" rel="stylesheet" />
<link media="only screen and (-webkit-min-device-pixel-ratio : 1.5), only screen and (min-device-pixel-ratio : 1.5)" href="iphone.css" type= "text/css" rel="stylesheet" />
我做对了吗?或者有更好的方法来做到这一点?