*{margin: 0;padding: 0;}

.big_box{
	width: 100%;
	height: 780px;
}


.big_box .about-history-list .slides li .item{
	height: 100px;
	left: 0;
	right: 0;
	transition: all 0.8s;
}

.big_box .about-history-list .slides li .item .desc{
	overflow: auto;
	height: 99px;
	transition: all 0.8s
}

/*.big_box .about-history-list .slides li .item:hover{
	min-height: 450px;
}*/

/*.big_box .about-history-list .slides li .item:hover .desc{
	height: 472px;
	overflow: auto;
}*/

/*.about-history-list .slides li:nth-child(even) .item:hover h3{
	top: 0;
}*/

/*.about-history-list .slides li:nth-child(even) .item:hover h3:before{
	display: none;
}*/

.big_box .about-history-list .slides li .item .desc p{
	margin-top: 18px;
}

/*.big_box .about-history-list .slides li .item:hover{
	bottom: 148px;
	height: 300px;
}*/

.big_box .about-history-list .slides li{
	height: 336px;
}

@media(max-width: 980px){
	.big_box{
		width: 100%;
		height: 8rem;
	}
	
	.box{
		width: 100%;
		height: 100%;
	}
	
	.about-history{
		display: none;
		width:100%;
		height:100%;
		padding: 0;
	}
}