#div_center{
	width: 100%;
	height: 550px;
	background: #F5F5F5;
	margin-top: -20px;
	padding-top: 35px;
}

.pp-oft{
	width: 1200px;
	height: 550px;
}
.pp-oft h2{
	width: 1205px;
	position: absolute;
	margin-left: 0px;
	font-size: 24px;
	color: #243484;
	font-weight: normal;
	border-bottom: 1px solid #d3d4d7;
	line-height: 65px;
	background: url(../img/bgs.jpg) no-repeat left bottom;
}
.dreting{	
	position: absolute;
	margin-top: 65px;
	padding: 40px 0;
	width: 1250px;
	height: 132px;
	margin-left: -13px;
}
.dreting a{
	width: 288px;
	text-align: center;
	margin-left: 11px;
	line-height: 50px;
	border: 1px solid #ddd;
	display: inline-block;
	font-size: 16px;
	font-family: "Microsoft YaHei";
	color: #333;
}
.dreting a:hover{
	border-color: black;
}
.layt-os{
	position: absolute;
	margin-top: 200px;
	width: 1250px;
	height: 317px;
	margin-left: -15px;
}
.lay_cent{
	cursor: pointer;
	float: left;
	margin-left: 13px;
	width: 292px;
	height: 317px;
	overflow: hidden;
}
.lay_cent dl{
	height: 115px;
	background: #1b2664;
	color: #fff;
	padding: 10px 20px;
}
.lay_cent dl dt{
	line-height: 35px;
	font-size: 14px;
	font-weight: bold;
}
.lay_cent dl dd{
	line-height: 20px;
	height: 80px;
	overflow: hidden;
	color: #ddd;
}
.lay_img{
	position: relative;
	z-index: 0;
	transition: all 1s;
}
.lay_cent:hover .opa_div{
	opacity: 0.5;
	background-size: 47px;
}
.lay_cent:hover .lay_img{
	transform: scale(1.2);
}
.opa_div{
	z-index: 2;
	position: absolute;
	margin-left: 0px;
	width: 292px;
	height: 304px;
	background: black url(../img/search.png) no-repeat center center;
	background-size: 0 auto;
	opacity: 0;
	transition: all 1s ease;
}
.opa_img{
	width: 292px;
	height: 169px;
	overflow: hidden;
}
#lay_dl{
	background: #F5A31C;
}
#lay_dl dd{
	color: white;
}
#cent3 a{
	display: block;
	width: 55px;
	height: 55px;
	position: absolute;
	left: 59%;
	top: 42%;
	
}
#cent4{
	position: relative;
	z-index: 1;
}
#cent4 img{
	position: relative;
	z-index: 0;
}
#cent4_img{
	position: absolute;
	left: 0px;
	top: 0px;
	z-index: 1;
}
.cen_div1{
	width: 290px;
	height: 304px;
	overflow: hidden;
}
.cen_div1 img{
	width: 100%;
	height: 100%;
	position: relative;
	left: 0;
	top: 0;
	transition: all .5s linear;
}
.cen_div2{
	position: absolute;
	left: 0;
	top: 0;
	z-index: 1;
}
.cen_div2 img{
	margin-left: -20px;
}
.lay_cent:hover .cen_div1 img{
	transform: scale(1.2);
}