<head>
<meta charset="UTF-8">
<title>Title</title>
<!--屏幕宽度小于400px,就加载a1.css-->
<link rel="stylesheet" href="a1.css" media="screen and (max-device-400px)">
<!--屏幕宽度大于600px小于400px,就加载a2.css-->
<link rel="stylesheet" href="a2.css" media="screen and (min-400px) and (max-device-600px)">
<style>
@media (max- 1500px) {
body{
background: red;
font-size: 160px;
}
}
@media (min- 700px) and (max- 1000px) {
body{
background: pink;
font-size: 160px;
}
}
@media (min- 350px) and (max- 700px) {
body{
background: black;
font-size: 160px;
}
}
/* 如果是横屏，背景将是浅蓝色 竖屏portrait*/
@media only screen and (orientation: landscape) {
body{
background-color: lightblue;
}
}
/*屏幕小于400px,显示小图*/
body{
background-image: url(img_smalltu.jpg);
}
/*屏幕大于等于400px,显示大图*/
@media only screen and (min-400px) {
body{
background-image: url("img_tu.jpg");
}
}
</style>
</head>
<body>
<div class="box">haohao</div>
</body>