.main_box li{
	width: 25%!important;
	height: 300px!important;
	margin: 0px!important;
}
.main_box{
	padding:0px!important;
}
.tips{
	width: 100%!important;
	height: 300px!important;
}
.item{
	display: block;
}
.item_bj{
	width: 100%;
	height: 300px!important;
	padding:0px!important
}
.item_title{
	width: 100%!important;
}
.main_box li:hover .item_title{
	top: 230px!important;
}
.main_box li:hover .item_icon{
	top: 150px!important;
}
.item_logo img{
	max-width: 100%!important;
}
.item_icon{
	left: 50%!important;
	margin-left: -20px!important;
	padding:0px!important
}
.item_bj img{
	width: 100%!important;
	height: 100%!important;
}
.main_nav li{
	margin-left: unset!important;
	width: unset!important;
}
.main_nav{
	height: 100px!important;
}

.chakan .item_icon{
	top: 150px!important;
	opacity: 1!important;
	width: 54px!important;
	height: 54px!important;
}
.main_box ul{
	justify-content: unset!important;
}