.nav_li1{
	position: relative;
}
.nav_ul2{
	display: none;
	opacity: 0;
	width: 132px;
    position: absolute;
    left: 0px;
    top: 55px;
    line-height: 55px;
	transition: all 0.3s;
	z-index: 1111;
}
.nav_ul2 .nav_li2 {
    text-align: center;
    height: 55px;
    background: #ffffff;
    border-bottom: 1px solid #999999;
}
.nav_li1:hover .nav_ul2{
	display: block;
	opacity: 1;
	transition: all 0.3s;

}