body {
    margin: 0 auto;
    max-width: 720px;
    height: 100%;
    /*font-size: 62.5%;*/
}
html, body, div, h1, h2, h3, h4, h5, h6, ul, ol, dl, li, dt, dd, blockquote, pre, form, fieldset, table, th, td, span,input{padding:0;margin:0px auto;font-family: Adobe Heiti Std,微软雅黑,sans-serif;outline:none;}
li{ text-decoration:none; list-style-type:none;}
.clearfix:after{clear:both;display: block;content: "...";visibility: hidden;height: 0;font-size: 0;}
.clearfix{*zoom:1;}
a{ color: #000;text-decoration: none;font-family: Adobe Heiti Std,微软雅黑,sans-serif;font-size: 16px;}
.red{ color: #cc0000;}
ul ,ol { list-style:none; margin:0px; padding:0px;}

 input[type=button], input[type=submit], input[type=file], button { cursor: pointer; -webkit-appearance: none; }
nav {
    max-width:720px;
}