.wel_a{
	width:100%; height:100%; overflow:hidden; margin:0;  float:left; background:#fff
}
.wel_b{
	width:100%; background:#242016; height:2px; float:left
}
.wel_c{
	width:100%; padding:0; 
}

.wel_c ul{float:left; margin:0; padding:0; list-style:none; padding:60px 0 50px 0;  top:150px; z-index:10; }
.wel_c ul li{float:left; width:100%; list-style: none ;padding:0px 0 0px 0; text-align:left; font-family:'Open Sans'; color:#777; font-size:12pt; line-height:20pt; text-align:center }
.wel_c ul li.first{margin-bottom:50px}
.wel_c ul li h2{color:#555; margin-bottom:40px; letter-spacing:2pt}
.wel_c ul li span{float:left; width:80%; margin-left:10%}

.wel_c ul li .medervideo{width:600px; height:400px}


@media all and (max-width: 768px), only screen and (-webkit-min-device-pixel-ratio: 2) and (max-width: 1024px), only screen and (min--moz-device-pixel-ratio: 2) and (max-width: 1024px), only screen and (-o-min-device-pixel-ratio: 2/1) and (max-width: 1024px), only screen and (min-device-pixel-ratio: 2) and (max-width: 1024px), only screen and (min-resolution: 192dpi) and (max-width: 1024px), only screen and (min-resolution: 2dppx) and (max-width: 1024px) {
.wel_c ul{padding:20px 0 40px 0}
.wel_c ul li{float:left; width:100%; list-style: none ;padding:0px 0 0px 0; text-align:left; font-family:'Open Sans'; color:#fff; font-size:12pt; line-height:20pt; text-align:center }
.wel_c ul li.first{margin-bottom:0px}
.wel_c ul li h2{margin-bottom:20px}
.wel_c ul li .medervideo{width:400px; height:267px}

}
@media screen and (max-device-width: 480px) {
.wel_c ul{padding:20px 0 40px 0}
.wel_c ul li{float:left; width:100%; list-style: none ;padding:0px 0 0px 0; text-align:left; font-family:'Open Sans'; color:#fff; font-size:12pt; line-height:20pt; text-align:center }
.wel_c ul li.first{margin-bottom:0px}
.wel_c ul li h2{margin-bottom:20px}
.wel_c ul li .medervideo{width:300px; height:200px}

}