.vidbacking-active-body-back{
	position: fixed;
	z-index: -100;
	min-width: 100%;
	min-height: 100%;
	top: 50%;
	left: 50%;
	background-size: cover;
	overflow: hidden;
	opacity: 1;
	transition: 2s opacity;
	transform: translateX(-50%) translateY(-50%);
}

.vidbacking-active-block-back{
	position: absolute;
	min-width: 100%;
	min-height: 100%;
	height: auto;
	width: auto;
	z-index: -100;
	top: 50%;
	left: 50%;
	transform: translateX(-50%) translateY(-50%);
}

.vidbacking{
	display: none;
}
.vidmask-body-back{
	opacity: 0.4;
	min-height: 100%;
	min-width: 100%;
	position: fixed;
	top: 0;
	left: 0;
	z-index: -50;
	display: block;
}
.vidmask-block-back{
	opacity: 1;
	min-height: 100%;
	min-width: 100%;
	position: absolute;
	top: 0;
	left: 0;
	height: auto;
	width: auto;
	z-index: -50;
	display: block;
}
.clearfix{display:block;clear:both;float:none;}
body{display:block;margin:0;padding:0;font-family:'Roboto', sans-serif;}

.video-back{display:block;padding:200px 0px 0px 0px;text-align:center;}
.video-back h1{display:block;text-align:center;color:#fff;font-size:50px;}
.video-back p{display:block;color:#fff;margin:0px;padding:0px;margin-bottom:20px;}
.video-back img{width:150px;}
.jq22-demo a{ color: aliceblue; font-family: "微软雅黑"; font-size: 20px; text-decoration: none; padding-left: 10px; padding-right: 10px; font-weight: bold;text-shadow:2px 2px 4px #000; }