.sl_con{ overflow: hidden; width: 1200px; height: 502px;}
.sl_boxa{ height: 502px; overflow: hidden;width: 1200px; height: 502px;}

.dsa3_l1{width: 374px; overflow: hidden;}
.dsa3_l1 dl{ overflow: hidden; background: #4d7fc9;}
.dsa3_l1 dl dt{ font-size: 0; float: left; width: 134px; height: 134px; padding: 16px;}
.dsa3_l1 dl dd{ float: left; width: 183px; padding-top: 15px; color: #fff; font-size: 14px; line-height: 24px;}
.dsa3_l1 dl dd h4{ font-size: 16px; font-weight: bold; padding-bottom: 5px;}
.dsa3_l1 dl.bg{ background: #5b8ed9; padding:4px 0;}

.dsa3_l2{ width: 1200px; overflow: hidden;}
.dsa3_l2 ul li{ font-size: 0; position: relative;}.dsa3_l2 ul li img{ width: 1200px; height: 502px;}
.dsa3_l2 ul li span{ display: block; position: absolute; left: 0; bottom: 0; width: 100%; height: 108px; line-height: 28px;font-size: 15px; color: #333; text-align: center;padding-top: 10px;}
.dsa3_l3{ width: 565px;}
.dsa3_l3 ul li{ font-size: 0; position: relative; float: left; margin:  0 2px 3px 0;}.dsa3_l3 ul li img{ width:280px; height:167px;}
.dsa3_l3 ul li span{ display: block; position: absolute; left: 0; bottom: 0; width: 100%; height:35px; line-height:35px;background:url(../image/spn2a.png) repeat; font-size: 13px; color: #333; text-align: center; color: #fff;}
.dsa3_l4{ float: right;width:635px; font-size: 0;}
.dsa3_l4 ul li{ position: relative;}
.dsa3_l4 ul li span{ display: block; position: absolute; left: 0; bottom: 0; width:575px;line-height:25px; background:#fff; filter:Alpha(opacity=70);-moz-opacity: 0.7; -khtml-opacity: 0.7 ; opacity: 0.7;font-size: 15px; color: #333; text-align: center; padding:10px 30px 10px; text-align: left; }
.dsa3_5{ width:265px; height: 502px; background: #018b1b; padding-left: 35px; color: #fff;}
.dsa3_5 h4{ padding-top: 60px;  font-size: 24px;}
.dsa3_5 h4 span{ color: #ffffff8a; font-size: 12px;/* text-transform: uppercase; */ display: block;}
.dsa3_5 p{ font-size: 16px; color: #fff; line-height: 28px; padding-top: 30px; padding-right: 30px;}
.dsa3_5 p strong{ display: block; font-weight:normal;}
.dsa3_6{ width:900px;}
.dsa3_6 img{ width:900px; height: 502px;}