实现自动识别 win iso mac android 操作系统，自动调用系统应用
付费部分为核心内容
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="author" content="cmge_zhiming"/>
<!--2020-03-10 -->
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
<meta name="format-detection" content="telephone=no, email=no">
<meta name="description" content="">
<title></title>
<script src="js/size.js"></script>
<style>
.btn {
border: 1px solid black;
border-radius: 10px;
padding: 5px;
}
</style>
</head>
<body>
<div class="main">
<div class="qq">
click me
</div>
隐藏内容此处内容需要权限查看
</div>
</body>
</html>
