.what .a2 .pic.sdch{background: url(../img/sdchbg.png) no-repeat  center top;}
.what .a2 .pic.jdsj{ background: url(../img/jdsjbg.png) no-repeat  center top;}
.what .a2 .pic.jjfa{background: url(../img/jjfabg.png)  no-repeat  center top; }




.tpxg66{
	width:100%;
	height: 600px;
	position:absolute;
	left:0;
	bottom:0px;
	z-index:111;
background: url(../img/sygywmdx.png) no-repeat  center 0px;
-webkit-animation:gywmxg 2s infinite steps(50, end);
    -moz-animation:gywmxg 2s infinite steps(50, end);
    -ms-animation:gywmxg 2s infinite steps(50, end);
    animation:gywmxg 2s infinite steps(50, end)
}

.tpxg {
	width:100%;
	height: 600px;
	position:absolute;
	left:0;
	bottom:0px;
	z-index:111;
	background:url(../img/sygywmdx.png) no-repeat center 0px;
	-webkit-animation:gywmxg 2s infinite steps(25,end);
	-moz-animation:gywmxg 2s infinite steps(25,end);
	-ms-animation:gywmxg 2s infinite steps(25,end);
	animation:gywmxg 2s infinite steps(25,end)
}
@-webkit-keyframes gywmxg {
	0% {
	background-position-y:0px
}
100% {
	background-position-y:-15000px
}
}@-moz-keyframes gywmxg {
	0% {
	background-position-y:0px
}
100% {
	background-position-y:-15000px
}
}@-ms-keyframes gywmxg {
	0% {
	background-position-y:0px
}
100% {
	background-position-y:-15000px
}
}@keyframes gywmxg {
	0% {
	background-position-y:0px
}
100% {
	background-position-y:-15000px
}
}