.libai1 img{
	border-radius: 10px ;
	padding-top: 30px;
	padding-right: 30px;
	width: 457px;
}
.div2{
	position: relative;
}
.libai>img{

	width: 250px;
	border-radius: 20px 20px 0 0;
	right: 200px;
	top: 560px;
	position: absolute;
	/* display: block; */
}
.nav2>a:hover{
	color: #fff;
}