.introduction{
	width: 1100px;
	height: 470px;
	margin: auto;
}
.title{
	height: 48px;
}
.intro_content{
	width: 1100px;
	height: 250px;
	margin: auto;
	margin-top: 75px;
}
.intro_pic{
	width: 261px;
	height: 247px;
	float: left;
	margin-left: 45px;
}
.intro_pic img{
	width: 100%;
	height: auto;
}
.intro_text{
	width: 720px;
	height: 215px;
	float: left;
	margin-left: 55px;
}
.intro_text p{
	font-size: 13px;
	color: #666;
	line-height: 23px;
}
.environment{
	width: 1100px;
	height: 685px;
	margin: auto;
}
.environment_list{
	width: 1120px;
	height: 400px;
	margin-left: -10px;
	margin-top: 55px;
}
.environment_list li{
	width: 265px;
	height: 189px;
	overflow: hidden;
	float: left;
	margin-left: 10px;
	margin-top: 10px;
}
.environment_list li img{
	width: 100%;
	height: auto;
}