#Download {
    width: 764px;
    height: 172px;
    text-align: center;
    position: absolute;
    top: 930px;
    left: 50%;
    margin-left: -370px;
    z-index: 51;
    border-radius: 5px;
    background: url(../image/down8.png) no-repeat left top;
}
#Download .btn_down_s1 {
    float: left;
    width: 240px;
    height: 100px;
    text-indent: -999em;
    margin-left: 80px;
    margin-top: 0px;
}
#Download .btn_down_s2 {
    float: left;
    width: 96px;
    height: 100px;
    text-indent: -999em;
    margin-left: 0px;
    margin-top: 0px;
}
#Download .btn_down_s3 {
    float: left;
    width: 96px;
    height: 100px;
    text-indent: -999em;
    margin-left: 0px;
    margin-top: 0px;
}
#Download .btn_down_s4 {
    float: left;
    width: 96px;
    height: 100px;
    text-indent: -999em;
    overflow: hidden;
    margin-left: 0px;
    margin-top: 0px;
}
.topcontainer {
    width: 1920px;
    height: 1018px;
    left: 50%;
    margin-left: -960px;
    overflow: hidden;
    position: relative;
    background: url() no-repeat center;
    background-position: 0px 0px;
    margin-top: 68px;
}















.daohang{width:1920px;height:60px;left:50%;margin-left:-960px;overflow:hidden;position:relative;background:url(../images/daohang.jpg) no-repeat center;background-position-x:center;background-position-y:center;background-position:0px -0px}
#downloaddh{width:1400px;height:51px;position:absolute;top:-5px;left:50%;margin-left:280px;z-index:1500;}
#downloaddha{float:left;width:1400px;height:51px;overflow:hidden;margin-right:20px;margin-top:10px}
#downloaddha .btn_downa{float:left;width:110px;height:51px;;position:relative;text-indent:-9999em;background:url(../images/d1.png) no-repeat left bottom;display:block;}
#downloaddha .btn_downa:hover{text-decoration:none;;background:url(../images/d1.png) no-repeat left top;}
#downloaddha .btn_downb{float:left;width:110px;height:51px;position:relative;text-indent:-9999em;background:url(../images/d2.png) no-repeat left bottom;display:block;margin-left:20px;}
#downloaddha .btn_downb:hover{text-decoration:none;background:url(../images/d2.png) no-repeat left top;}
#downloaddha .btn_downc{float:left;width:110px;height:51px;position:relative;text-indent:-9999em;background:url(../images/d3.png) no-repeat left bottom;display:block;margin-left:20px;}
#downloaddha .btn_downc:hover{text-decoration:none;background:url(../images/d3.png) no-repeat left top;}
#downloaddha .btn_downd{float:left;width:110px;height:51px;position:relative;text-indent:-9999em;background:url(../images/d4.png) no-repeat left bottom;display:block;margin-left:20px;}
#downloaddha .btn_downd:hover{text-decoration:none;background:url(../images/d4.png) no-repeat left top;}