.bg{
	width: 1920px;
	height: 2190px;
	margin: 0 auto;
	background: url(images/bg.png) no-repeat center top;
	padding-top: 0px;
}
.topbox{
	width: 20px;
	height: 1080px;
	margin: 0 auto;
}
.mainbox{
	margin: 0 auto;
	width: 1075px;
	height: 1080px;
	overflow: hidden;
}
.mainbox a{
	display: block;
	width: 195px;
	height: 420px;
	float: left;
    margin-right: 10px;
    margin-left: 10px;
    margin-bottom: 30px;
}
.mainbox a img{
	width: 100%;
	height: 100%;
	display: block;
}