*{margin:0px;padding:0px;}
ul,li{list-style-type:none;}
img{border:0px;}
body{font-size:13px;font-family:"微软雅黑";color:#6d6d6d;}
.asfa{position:relative;float:left;left:50%;}
.banner{height:400px;overflow:hidden;width:100%;}