.hover_gzA{
	position:relative;
	overflow:visible;
	width:1000px;
	height:299px;
}
.hover_gz{
	position: absolute;
    overflow: visible;
    width: 700px;
    height: 120px;
    top: 180px;
    left: 150px;
	z-index:2;
    cursor: pointer;
}
.hover_gz .pos{
	position: absolute;
	z-index:3;
	top:120px;
	left:50%;
	margin-left:-960px;
	width:1920px;
	height:0;
	visibility:hidden;
    transition: all .6s ease-out;
    -webkit-transition: all .6s ease-out;
	overflow:hidden;
}
.hover_gz:hover .pos{
	height:755px;
	visibility:visible;
    transition: all 1.2s ease-out;
    -webkit-transition: all 1.s ease-out;
	}