.security_head{
	width: 1200px;
	padding-top:20px;
	margin:auto;
	clear: both;	
}
.security_head .left{
	float: left;	
}
.security_head .right{
	float: right;	
}
.security_head:after{
	display: block;
	content: "020";
	clear: both;
	height: 0;
	visibility: hidden;
}
.security_head .page_title{
	font-size:20px;
}
.security_head .nav_link{
	padding-top:50px;
	font-size:16px;
}
.security_head .nav_link a{
	margin-left:50px; 
	padding-bottom: 5px;
}
.security_head .nav_link a.active{
	color:#ff6600;
	border-bottom: 2px solid #ff6600;
}