The beginning css part of WeChat H5

<meta content="" name="description">
<meta content="" name="keywords">
<meta charset="utf-8">
<meta content="wei.xin" name="author">
<meta content="application/xhtml+xml;charset=UTF-8" http-equiv="Content-Type">
<meta content="eric.wu" name="author">
<meta content="telephone=no, address=no" name="format-detection">
  
<meta content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-
  
scale=1.0, user-scalable=no" name="viewport">
body{
    font-family: "Microsoft YaHei","微软雅黑","MicrosoftJhengHei","华文细
  
黑","Helvetica","Arial","sans-serif";
font-size: 14px;
word-break: break-all;    
}
*{
box-sizing: border-box;
margin: 0px;
padding: 0px;
}
.container {
    max-width: 640px;
    margin: auto;
    min-height: 100%;
    position: relative;
    display: block;
    background-size: 100% 100%;
    min-width: 320px;
}
menu_2 {
    height: 50px;
    width: 100%;
    max-width: 640px;
    border-top: 1px solid #D8D8D8;
    position: fixed;
    bottom: 0px;
    z-index: 102;
}