#holder{
		width: 100%;
		height: 100%;
		overflow:hidden;
		position: absolute;
		top:0;
		left:0;
		cursor: pointer;
		text-align: center;
}

.logoopt {
	z-index:1000;
	position:absolute;
	top:5%;
	left:2%;
	width:18%;
	min-width:180px;
	}
.logoopt img{
	display:block;
	width:100%;
	min-width:180px;
	}
.button{
	z-index:1000;
	position:absolute;
	right:2%;
	top:8%;
	overflow:hidden;
	}
.button>a{
	display:block;
	width:50px;
	height:50px;
	float:left;
	margin-left:12px;
	}
.button .pilot{
	background:url(/image/pilot.png) no-repeat;
	transition:all 0.3s linear;
	}
.button .phone{
	background:url(/image/phone.png) no-repeat;
	transition:all 0.3s linear;
	}
.button .black {
    background: url(/image/black.png) no-repeat;
    transition: all 0.3s linear;
}
.button .black:hover{
	background:url(/image/black_hover.png) no-repeat;
	}
.button .pilot:hover{
	background:url(/image/pilot_hover.png) no-repeat;
	}
.button .phone:hover{
	background:url(/image/phone_hover.png) no-repeat;
	}
.footer_button{width:100%;height:0px;z-index:1000;position:absolute;bottom:0;}
.footer_button .bot_a{
	z-index:2000;
	position:absolute;
	bottom:calc(50% - 10px);
	right:38px;
	display:block;
	width:28px;
	height:70px;
	background:url(/image/menu_one.png) no-repeat;
	}
	
.bot_nav{
	z-index:3000;
	border-top:1px solid rgba(256,256,256,0.7);
	position:absolute;
	bottom:0;
	left:0;
	width:100%;
	height:0px;
	overflow:hidden;
	background:rgba(256,256,256,0.15);
	}

.bot_nav .nav{
	width:calc(100% - 105px);
	height:105px;
	float:left;
	margin-left:auto;
	margin-right:auto;
	}
.bot_nav .nav>ul{
	width:52%;
	margin:0 auto;
	}
.bot_nav .nav>ul>li{
	float:left;
	width:16.6%;
	height:105px;
	}
.bot_nav .nav li a{
	color:#fff;
	font-size:15px;
	text-align:center;
	line-height:16px;
	margin-top:18px;
	display:block;
	}
.bot_nav .nav li a img{
	width:50px;
	height:40px;
	display:block;
	margin:0 auto 10px;
	}
.bot_nav>a{
	background-color:#838EA7;
	display:block;
	width:105px;
	height:105px;
	float:left;
	line-height:105px;
	}
.first_nav{position:relative;}
/* .first_nav ul{width:100%;height:0;overflow:hidden;position:absolute;z-index:4;bottom:105px;background-color:rgba(256,256,256,0.2);} */
.first_nav ul{width:100%;height:auto;display:none;position:absolute;z-index:4000;bottom:105px;background:rgba(256,256,256,0.15);}
.first_nav ul li{width:100%;height:105px;text-align:center;}
/* .first_nav ul li:after{width:0;height:100%;content:' ';display:inline-block;vertical-align:middle;} */
.first_nav ul li a{box-sizing:border-box;width:80%;height:100%;border-bottom:1px solid #999;display:inline-block!important;margin-top:0!important;padding-top:18px;box-sizing:border-box;}
.first_nav ul li:last-child a{border:none;}
.address_nav{
background:rgba(0,0,0,0.25)!important;
}