/*下载*/
#downloada {
	    float: left;
    width: 869px;
    height: 235px;
    overflow: hidden;
    margin-top: 33px;
    margin-left: 431px;
}

#downloada .btn_01 {
	float: left;
	width: 75px;
	height: 235px;
	position: relative;
	text-indent: -9999em;
	background: url() no-repeat left bottom;
	display: block;
	margin-top: 0px;
}
#downloada .btn_02 {
	float: left;
	width: 75px;
	height: 235px;
	position: relative;
	text-indent: -9999em;
	background: url() no-repeat left bottom;
	display: block;
	margin-left: 36px;
	margin-top: 0px;
}
#downloada .btn_03 {
	float: left;
	width: 75px;
	height: 235px;
	position: relative;
	text-indent: -9999em;
	background: url() no-repeat left bottom;
	display: block;
	margin-left: 36px;
	margin-top: 0px;
}
#downloada .btn_04 {
	float: left;
	width: 75px;
	height: 235px;
	position: relative;
	text-indent: -9999em;
	background: url() no-repeat left bottom;
	display: block;
	margin-left: 36px;
	margin-top: 0px;
}