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<head>
<meta charset="UTF-8">
<title>Title</title>
<!--屏幕寬度小於400px,就加載a1.css-->
<link rel="stylesheet" href="a1.css" media="screen and (max-device-width:400px)">
<!--屏幕寬度大於600px小於400px,就加載a2.css-->
<link rel="stylesheet" href="a2.css" media="screen and (min-width:400px) and (max-device-width:600px)">
<style>
@media (max-width: 1500px) {
body{
background: red;
font-size: 160px;
}
}
@media (min-width: 700px) and (max-width: 1000px) {
body{
background: pink;
font-size: 160px;
}
}
@media (min-width: 350px) and (max-width: 700px) {
body{
background: black;
font-size: 160px;
}
}
/* 如果是橫屏,背景將是淺藍色 豎屏portrait*/
@media only screen and (orientation: landscape) {
body{
background-color: lightblue;
}
}
/*屏幕小於400px,顯示小圖*/
body{
background-image: url(img_smalltu.jpg);
}
/*屏幕大於等於400px,顯示大圖*/
@media only screen and (min-width:400px) {
body{
background-image: url("img_tu.jpg");
}
}




</style>
</head>
<body>
<div class="box">haohao</div>
</body>


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