<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>媒体查询文字大小</title>
<style type="text/css">
h1{
font-size: 20px;
text-align: center;
line-height: 200px;
width: 200px;
height: 200px;
background: red;
}
@media only screen and (min-width: 400px) and (max-width: 640px) {
h1{
font-size: 40px;
text-align: center;
line-height: 400px;
width: 400px;
height: 400px;
background: pink;
}
}
@media only screen and (min-width: 640px) and (max-width: 1000px){
h1{
font-size: 60px;
text-align: center;
line-height: 600px;
width: 600px;
height: 600px;
background: yellow;
}
}
</style>
</head>
<body>
<h1>helloworld</h1>
</body>
</html>
