<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>Title</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body{
margin: 0;
}
.pg{
width: 100%;
background-color: rebeccapurple;
}
@media (min-width: 666px) {
.pg{
background-color: green;
}
} @media (min-width: 888px) { //大于 888 就红色
.pg{
background-color: red;
}
}
</style>
</head>
<body>
<div>
<div class="pg">响应式布局</div>
</div>
</body>
</html>