.header{
	height: 180px;
	width: 1100px;
	margin: 0 auto;
	padding-top: 80px;
}
.header h1 {
	font-size: 50px;
	font-weight: bold;
	margin-bottom: 10px;
	text-shadow: 2px 2px 2px #070d10;
	letter-spacing: 3px;
	color: #fff;
}
.header h2{
	font-size: 40px;
	font-weight: bold;
	text-shadow: 1px 1px 1px #070d10;
	color: #fff;
}
.main{
	width: 1100px;
	margin: 0 auto;
}
.nav {
	margin-bottom: 20px;
}
nav{
	line-height: 56px;
	background: #1473bf;
}
nav a{
   margin-right: 116px;
   padding: 11px 30px;
   font-size: 26px;
   color: #fff;
}
nav a:nth-child(4){
	margin-right: 0px;
}
nav a:hover{
	border-bottom: 3px solid #FFF;
}
.d_cont{
	height: 800px;
}
.d_title{
	margin-bottom: 20px;
	font-size: 26px;
	text-align: center;
}
.flooter{
	margin-top: 30px;
	width: 100%;
	line-height: 68px;
	background: #1473bf; 
	text-align: center;
	color: #fff;
}
.download{
	margin-top: 30px;
	text-align: center;
}
.download a{
   padding: 10px 20px;
   background:#1473bf;
   color: #fff; 
}