.introduction {
	position: relative;
}
.introduction:before{
	position: absolute;
	content: "";
	right: 0;
	top: 100px;
	width: 124px;
	height: 271px;
	background-image: url(../images/icon2.png);
}
.introduction .title,.signing .title,.communication .title{
	font-size: 28px;
	color: #343434;
	text-align: center;
	margin-bottom: 50px;
}
.introduction .content{
	width: 1200px;
	margin: 0 auto;
	overflow: hidden;
}
.introduction .content .left{
	width: 590px;
	float: left;
}
.introduction .content .left img{
	width: 100%;
}
.introduction .content .right{
	position: relative;
	float: right;
	width: 570px;
	padding-left: 40px;
}
.introduction .content .right:before{
	position: absolute;
	content: "";
	left: -239px;
	top: 141px;
	width: 417px;
	height: 417px;
	background-image: url(../images/icon1.png);
	z-index: -1;
}
.introduction .content .right .h2{
	width: 280px;
	font-size: 40px;
	color: #343434;
	font-weight: bold;
	margin-top: 80px;
	margin-bottom: 20px;
}
.introduction .content .right .text{
	font-size: 18px;
	color: #343434;
	line-height: 2;
}
.signing {
	padding-top: 80px;
}
.signing .content{
	width: 1200px;
	margin: 0 auto;
}
.signing .content img{
	width: 100%;
}
.communication {
	padding-top: 80px;
	text-align: center;
}
.communication .content{
	width: 1200px;
	margin: 0 auto;
}
.communication .content ul{
	overflow: hidden;
}
.communication .content li{
	position: relative;
	display: inline-block;
	float: left;
	width: 580px;
	margin-bottom: 40px;
}
.communication .content li img{
	display: block;
	width: 100%;
}
.communication .content li:nth-child(2n){
	float: right;
}
.communication .content li:hover .all-fix{
	display: block;
}
.communication .content li .all-fix{
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background-color: rgba(78,78,78,0.7);
	display: none;
}
.communication .content li .all-fix p {
	line-height: 315px;
	text-align: center;
	color: #fff;
	font-size: 22px;
}
.more{
	margin-top: 40px;
	display: inline-block;
	width: 225px;
	height: 50px;
	background-color: #739fba;
	text-transform: uppercase;
	line-height: 50px;
	font-size: 18px;
	margin-bottom: 80px;
}
.more a{
	color: #fff;
}
.big_content_list{
	display: none;
}
.big_content_list.active{
	display: block;
}
@media screen and (max-width:768px) {
	.introduction .content{
		width: 100%;
	}
	.introduction .content .left{
		width: 100%;
	}
	.introduction:before{
		display: none;
	}
	.introduction .title, .signing .title, .communication .title{
		margin-bottom: 20px;
	}
	.introduction .content .right{
		width: 100%;
		padding: 0 10px;
		float: none;
	}
	.introduction .content .right:before{
		display: none;
	}
	.introduction .content .right .h2{
		width: 100%;
		font-size: 20px;
		box-sizing: border-box;
	}
	.signing{
		padding-top: 40px;
	}
	.signing .content,.communication .content{
		width: 100%;
		padding: 0 10px;
		box-sizing: border-box;
	}
	.communication .content li{
		width: 48%;
	}
	.communication .content li .all-fix p{
		line-height: 103px;
	}
}