<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" name="viewport">
<meta content="yes" name="apple-mobile-web-app-capable">
<meta content="black" name="apple-mobile-web-app-status-bar-style">
<meta name="format-detection" content="telephone=no">
<meta name="format-detection" content="email=no">
<title>aia-activity02</title>
<style>
*{margin:0; padding:0; -webkit-tap-highlight-color: rgba(0,0,0,0);box-sizing: border-box;}
html{font-size:62.5%;
font-family: "Helvetica Neue", Helvetica, STHeiTi, "Microsoft YaHei", Arial, sans-serif;
-webkit-text-size-adjust:100%;
-ms-text-size-adjust:100%;}
body{position:relative;min-320px;
line-height: 1;
font-size:14px;
font-size: 1.4rem;
-webkit-overflow-scrolling: touch;
}
.tt1{
20rem;
height:20rem;
margin:10rem auto;
border:0.2rem solid red;
background-color: #00f;
font-size: 1.8rem;
}
@media (max- 767px) {
}
@media (max- 321px) {
}
</style>
</head>
<body>
<div class="tt1">
我是块1
</div>
</body>
</html>
testclock,
