ul,li,p,span,div,dl,dd,dt,font,i,em,h1,h2,h3,h4,h5,h6,em,i,header,section{
    margin:0;
    padding:0;
}
header,section,footer{
	display:block;
}
html,body{
	width:100%;
}
body{
	background:#fff;
	font-family:'微软雅黑';
}

ul{
	list-style:none;
}

img{
	display:block;
	vertical-align:top;
	border:none;
}

a{ 
	text-decoration:none;
	color:#333;
	}
.clearfix:after{
	content:'';
	clear:both;
	height:0;
	width:100%;
	overflow:hidden;
}