*{
	font-family: 微软雅黑;
	margin:0px;
	padding:0px;
	color:#000;
}
.w1200{
	width:1200px;
	margin:0 auto;
}
.w900{
	width:900px;
	margin:0 auto;
}
a{
	text-decoration: none;
	color:#fff;
}
ul{
	list-style:none;
}
.fl{
	float:left;
}
.fr{
	float: right;
}
.clear{
	clear: both;
}
.nk15{
	width:100%;
	height: 15px;
	background: #fff;
}
.nk50{
	width:100%;
	height: 50px;
	background: #fff;
}