*{
	margin: 0;
	padding: 0;
	list-style: none;
	text-decoration: none;
}
header{
	width: 100%;
	height: 70px;
	background: #000000;
	position: absolute;
	top: 0;
}
.bg_pc,.bg_ip{
	width: 100%;
	height: 100%;
	position: absolute;
}
.nav_pc a{
	color: white;
	line-height: 70px;
}
.nav_pc{
	display: flex;
}
.nav_pc li{
	float: left;
	margin-right: 80px;
}
.nav_pc a:hover{
	text-decoration: none;
}
.logo{
	padding: 17px 0;
}
.nav_pc span{
	display: inline-block;

	height: 48px;
}
.nav_pc span.active{
	border-bottom: 3px solid #fff;
}

.container{
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	margin: 0 auto;
}
.ip_x{
	float: right;
	margin-top: 20px;
	margin-right: 20px;
}
.cont{
	width: 100%;
	padding: 0 15px;
	clear: both;
	margin-top: 100px;
}
.cont li{
	padding: 20px 0;
	text-align: center;
	border-bottom: 1px solid #999;
}
.cont li a{
	color: black;	
	font-weight: bold;
}
.cont li a.active{
	color: #08B1E8;
}
.cont li a:active{
	text-decoration: none;
}
.our{
	margin-top: 100px;
	font-size: 36px;
	line-height: 100px;
	font-weight: bold;
	
}
.our span{
	display: inline-block;
	width: 40px;
	text-align: center;
	vertical-align: middle;
}
.our img{
	margin-top: -7px;

}
.jianjie{
	box-sizing: border-box;
	position: absolute;
	bottom: 0;
	left: 0;
	right: 0;
	margin: 160px auto;
	padding: 40px 50px;
	width: 1170px;
	background: url(../img/矩形.png) no-repeat center;
	height: 240px;
	font-family: PingFang-SC-Medium;
	font-size: 20px;
	color: #FFFFFF;
	letter-spacing: 3px;
}
.jianjieprivate{
	box-sizing: border-box;
	position: absolute;
	bottom: 0;
	left: 0;
	right: 0;
	margin: 160px auto;
	padding: 40px 50px;
	width: 1170px;
	background: url(../img/矩形.png) no-repeat center;
	height: 240px;
	font-family: PingFang-SC-Medium;
	font-size: 20px;
	color: #000000;
	letter-spacing: 3px;
}
.jianjie .tl{
	text-align: center;
	font-family: PingFang-SC-Heavy;
	font-size: 30px;
	color: #FFFFFF;
	letter-spacing: 2.25px;
	margin:0 0 30px 0;
}
footer{
	background: #000000;
	width: 100%;
	line-height: 30px;
	color: #909090;;
	text-align: center;
	position: fixed;
	bottom: 0;
}
footer p{
	width: 1200px;
	margin: 0 auto;
}
@media only screen and (min-width: 768px) and (max-width: 1200px) {
	.nav_pc li{
		margin-right: 40px;
	}
}
@media only screen and (min-width: 768px) and (max-width: 1000px) {
	.nav_pc li{
		margin-right: 20px;
	}
}
@media  screen and (max-width:768px )  and (max-width: 1980px){
	.nav_pc{
		display: none;
	}
	.bg_ip{
		display: block;
	}
	.bg_pc{
		display: none;
	}
	.daohang{
		background: #000000;
	}
	.nav_ip{
		display: none;
		width: 100%;
		height: 100%;
		position: absolute;
		top: 0;
		left: 0;
		background: rgba(255,255,255,.99);
	}
	.nav_line{
		display: block;
		float: right;
		margin-top: 24px;
		margin-right: 5px;
	}
	.nav_line .line{
		display: block;
		width: 30px;
		height: 3px;
		background: #fff;
		
	}
	.nav_line .line+.line{
		margin-top: 6px;
	}
	.logo{
		height: 70px;
		background: url(../img/1D655226-88CA-47B8-B1BA-EA8BE03D2764@0.5x.png) no-repeat left;
	}
	.jianjie{
		width: 80%;
		height: 400px;
		font-size: 14px;
	}
	.jianjie .tl{
		font-weight: bold;
		font-size:22px;
		text-align: center;
		margin-top:52px ;
	}
	header{
		display: none;
	}
	.row{
		padding: 0 15px;
	}
	footer p {
		width: 100%;
		line-height: 25px;
	}
	
}
@media  screen and (min-width: 768px) and (max-width: 1980px) {
	.nav_pc{
		display: block;
	}
	.nav_ip{
		display: none;
	}
	.nav_line{
		display: none;
	}
	.bg_ip{
		display: none;
	}
	.bg_pc{
		display: block;
	}
	.logo{
		height: 70px;
		background: url(../img/1D8AD4B3-1D80-4F34-88AC-006E11D2C479@1x.png) no-repeat left;
	}
	header{
		display: block;
	}
}

@media only screen and (min-width: 320px){
	html {
    	font-size: 62.5% !important;
  	}
}
@media only screen and (min-width: 640px){
	html {
		font-size: 125% !important;
	}
}
@media only screen and (min-width: 750px){
	html {
		font-size: 150% !important;
	}
}
@media only screen and (min-width: 1242px){
	html {
		font-size: 187.5% !important;
	}
}