body,dl,dt,dd,ul,ol,li,h1,h2,h3,
h4,h5,h6,pre,code,form,input,button,textarea,p,th,td {
	margin:0;
	padding:0
}
body {
	font-size:16px;
	font-family: "微软雅黑" ,arial;
}
img {
	border:0
}
ul ,ol{list-style: none;}
a{text-decoration: none;color:#333;}

.fl{float:left;}
.fr{float:right;}
.clear{clear:both;}

.mt50{margin-top:50px;}
.mb50{margin-bottom: 50px;}