body{
    background: url(../images/ggwhzykbackground.png) repeat center center;
}
.box_center{
	position:absolute;
	width:1300px;
	min-width:1100px;
	height:534px;
	top:50%;
	left:50%;
	transform: translateX(-50%) translateY(-50%);
}
.choose_a{
	display:inline-block;
	width:404px;
	height:234px;
	margin-right:22px;
	border-radius:16px;
	box-shadow: 0px 0px 6px #000;
	background-size:cover;
}
.choose_a1{
    background: url(../images/qunzong.png) no-repeat center center;
}
.choose_a2{
	/* float:right; */
    background: url(../images/mingshu.png) no-repeat center center;
}
.choose_a3{
    background: url(../images/yuejudongman.png) no-repeat center center;
}
.choose_a4{
	/* float:right; */
	margin-top:21px;
    background: url(../images/yuequ.png) no-repeat center center;
}
.choose_a5{
	/* float:right; */
	margin-top:21px;
    background: url(../images/sheying.png) no-repeat center center;
}
.choose_a6{
	/* float:right; */
	margin-top:21px;
    background: url(../images/xingshidongman.png) no-repeat center center;
}
.back_to_index{
	position:absolute;
	right:37;
	bottom:-43;
	width:102px;
	height:43px;
    background: url(../images/back.png) no-repeat center center;
}
.choose_a:hover{
	box-shadow: 0px 0px 12px #000;
}