body {
	/* width:100%;
	height:100vh; */
	background: url('../image/bg_contect.png') no-repeat no-repeat center top;
	background-size:cover;
	background-attachment:fixed;
}
.gitBox {
	position:absolute;
	width:100%;
	bottom:0;
	left:0;
}
ul li {
	float: left;
	width: 50%;
}
ul li ._li {
	width: 154px;
	height: 66px;
	margin: 0 auto 12px
}
ul li:nth-child(1) ._li {
	background: url('../image/icon_video.png') no-repeat center top;
	background-size: cover;
}
ul li:nth-child(2) ._li {
	background: url('../image/icon_tiku.png') no-repeat center top;
	background-size: cover;
}
ul li:nth-child(3) ._li {
	background: url('../image/icon_plan.png') no-repeat center top;
	background-size: cover;
}
ul li:nth-child(4) ._li {
	background: url('../image/icon_contect.png') no-repeat center top;
	background-size: cover;
}
ul li:nth-child(5) ._li {
	background: url('../image/icon_eye.png') no-repeat center top;
	background-size: cover;
}
ul li:nth-child(6) ._li {
	background: url('../image/icon_lianxi.png') no-repeat center top;
	background-size: cover;
}

ul li ._li a:after {
    content: "";
    display: block;
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    background-image: radial-gradient(circle, #666 10%, transparent 10%);
    background-repeat: no-repeat;
    background-position: 50%;
    transform: scale(10, 10);
    opacity: 0;
    transition: transform .3s, opacity .5s;
}

ul li ._li a:active:after {
    transform: scale(0, 0);
    opacity: .3;
    transition: 0s;
}
ul li ._li a {
	position: relative;
	display: block;
	line-height: 66px;
	text-align: right;
	padding-right:30px;
	font-size: 14px;
	font-family: PingFang;
	font-weight: 500;
	color: #333333;
	overflow: hidden;
}
.app_enter{
	padding-top:20px;
	text-align: center;
	padding-bottom:30px;
}
.app_enter a {
	font-size: 15px;
	font-family: PingFang;
	font-weight: 400;
	color: #FFFFFF;
	display: inline-block;
}
.app_enter a i {
	font-weight:300;
	font-size:14px;
	color:#ccc
}
.app_enter a i:nth-child(2) {
	position: relative;
	left:-10px
} 

.layermain {
	position:fixed;
	top:0;
	left:0;
	width:100%;
	height:100%;
	z-index: 99;
	background: rgba(0,0,0,.5);
}

.ynda {
	width: 85%;
	max-width: 500px;
	position: absolute;
	bottom:90px;
	left:0;
	margin: 0 auto;
	right: 0;
}
.ynda img {
	width: 80%;
	float: left;
}