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<!DOCTYPE>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<meta name="viewport" content="width=device-width,initial-scale=1.0,user-scalable=0">
<script>
var scale = 1 / devicePixelRatio;
document.querySelector('meta[name="viewport"]').setAttribute('content','initial-scale=' + scale + ', maximum-scale=' + scale + ', minimum-scale=' + scale + ', user-scalable=no');
let deviceWidth = document.documentElement.clientWidth;
document.documentElement.style.fontSize = deviceWidth / 7.5+ 'px';
</script>
<style>
body {
font-size:14px;
}
</style>
</head>
<body>
</body>
</html>
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