body {
	margin: 0 auto;
	font-size: 16px;
	font-family: "微软雅黑";
	line-height: 22px;
	background-color: antiquewhite;
}
div,p,input,ul,li,h1,h2,h3 {
	height: auto;
	margin: 0;
	padding: 0;
	vertical-align: middle;
	list-style: none;
}


.web{
	width: 1660px;
	height: auto;
	overflow: hidden;
	margin: 0 auto;
}
.top{
	height: 380px;
}
#nav{
	height: 45px;
	width: 100%;
	background: #313131;
	
}
#nav ul{
	padding: 0px;
}
#nav ul li{
	float: left;
	text-align: center;
	margin: 0px 90px;
}
#nav ul li a{
	line-height: 45px;		/*文本行高*/
	font-size: 16px;		/*文本大小*/
	color: #ffffff;
	text-decoration:none;		/*取消链接下滑线*/
}
.main{
	height: auto;
	overflow: hidden;
}
.title{
	width: 200px;
	height: 50px;
	border-bottom: #e9421a 3px solid;
	line-height: 50px;
	margin: 0 auto;
	font-size: 20px;
	margin-top: 20px;
	margin-bottom: 20px;
	text-align: center;
}
.ibox1{
	height: 335px;
}
.ibox1 ul{
	padding: 0px;
}
.ibox1 ul li{
	float: left;
	width: 400px;
	margin: 0px 7px;
}
.ibox1 ul li h1{
	height: 45px;
	line-height: 45px;
	font-weight: normal;
	text-align: center;
	font-size: 20px;
}
.ibox2{
	height: 270px;
	padding-left: 15px;
	padding-right: 15px;
}
.ibox2 img{
	float: left;
	margin-right: 20px;
	width: 650px;
}
.ibox2 p{
	line-height: 30px;
	text-indent: 2em;
	font-size: 24px;
}
.foot{
	height: 50px;
	line-height: 50px;
	background: #cccccc;
	text-align: center;
	font-size: 14px;
}
img{
	width: 100%;
	
}
.dt{
	height: 100%;
	object-fit: cover;
	
}
button{
	
	margin-top: 11px;
}
.ttc{
	width: 65%;
	margin-bottom: 1vh;

}	
	video{
		
		width: 60%;
	}