*{
	padding:0px;
	margin:0px;
}

.body{
	width:100%;
}

.header{
	height:52px;
	line-height: 52px;
	width:100%;
	background: #092975; 
	margin:0px auto;
	position:fixed;/*固定作用*/
	top:15px;   /*改*/
	/*top:0px;*/
	z-index: 1001;
	opacity:0.7;
}

.header_main li, .header_sub li{
	list-style-type: none;
}

.header_main li a{
	text-decoration: none;
	display: inline-block;
	height: 52px;
	/*width:150px;*/
	width:9.375em;
	line-height: 52px;
	text-align: center;
	font-family: Corbel;
	font-weight: bolder;
	color:#fff;
}

.header_main li{
	float: left;
}

.header_main li a:hover{
	color:#fff;
	background: #85183c;
	border-radius: 5px;
	/*width:150px;*/
	width:9.375em;
	height:55px;
}


.header_sub{
	display: none;
	/*position: absolute;*/
}

.header_main li:hover .header_sub{
	display: block;
	background-color: #092975;
	position: relative;
	left:-40px;
	top:-10px;
}

.header_sub li{
	float: none;
}

.header_main_pic{
	margin-left: -14px;
	/*margin-left: -18px;*/
	margin-right: 30px;
	margin-top: -5px;
}

.header_main_pic img{
	height:52px;
}


/*中间的背景图*/
.middle{
	height:800px;
	width:100%;
	background-color:#B3E7F0;
	margin:0px auto;
	margin-top:26px;
}

#middle_title{
	width:81%;
	height:250px;
	margin: 0px auto;
	color:#fff;
	font-size: 48px;
	font-weight: bolder;
	text-align: center;
	font-family: Times new Roman;
	position: relative;
	top: 50px;
	padding-top: 30px;
}

.middle_pic{
	height:2800px;
	width:100%;
	background: url(http://2016.igem.org/wiki/images/c/c3/Nanjing_NFLS--algal_background2.jpg) no-repeat fixed;
	background-size:100%;
}

.NFLS_logo{
	width:100%;
	height:800px;
	text-align: center;
}

.NFLS_logo img{
	height:600px;
}

.home_overview {
	width:81%;
	height:400px;
	font-size: 23px;
	line-height: 28px;
	text-align: justify;
	color: #fff;
	font-family: Cambria;
	position: relative;
	top:100px;
	left: 100px;
	border:3px solid #E9D547;
	padding:20px;
}

.home_team{
	width:100%;
	height:400px;
	background: url(http://2016.igem.org/wiki/images/9/98/Nanjing_NFLS--algal_textbackground.jpg),no-repeat,fixed;
	background-size: 1392px;
	margin-top: 240px;
}

.home_team_content{
	width:81%;
	height:335px;
	font-size: 23px;
	line-height: 28px;
	text-align: justify;
	color: #000;
	font-family: Cambria;
	margin-left: 100px;
	padding:20px;
	border:3px solid #092975;
	position: relative;
	top:10px;

}

.home_team_title{
	text-align: center;
	margin-right: 50px;
	font-size: 40px;
	color:#092975;
	line-height: 50px;
	font-weight: bolder;

}

.home_overview_title a:hover{
	color:red;
	background-color: blue;
	border-radius: 6px;
	padding:10px;
}

.home_overview_title a:link{

}

.home_team_title a:hover{
	background-color: #E9D547;
	padding:10px;
	border-radius: 6px;
}

.Human_Practice_title a:hover{
	background-color: blue;
	padding:10px;
	border-radius: 6px;
}


.Human_Practice{
	width:100%;
	height:850px;
}

.Human_Practice_content{
	width:81%;  /* 改*/
	height:420px;
	font-size: 23px;
	line-height: 28px;
	text-align: justify;
	color: #fff;
	font-family: Cambria;
	position: relative;
	top:100px;
	left: 100px;
	border:3px solid #E9D547;
	padding:20px;
}

.home_overview_title, .Human_Practice_title{
	text-align: center;
	font-size: 40px;
	line-height: 50px;
	font-weight: bolder;
	color:#E9D547;
	margin-bottom: 10px;
}


/*logo区域*/
.logo_area{
	width:100%;
	height:200px;
	background: url(http://2016.igem.org/wiki/images/9/98/Nanjing_NFLS--algal_textbackground.jpg),no-repeat,fixed;
	background-size: 1392px;
	margin-top:2080px;
}

.logo_one, .logo_two{
	float: left;
}
.logo_one img{
	/*width:170px;*/
	width:10.625em;
	margin-left:240px;
	margin-top:10px;
}

.logo_two img{
	/*width:563px;*/
	width:35.2em;
	margin-top:50px;
	margin-left:80px;
}



/*底部导航*/
.bottom{
	width: 100%;
	height:160px;
	background-color:#3C3E3F;
	margin:0px auto;
	padding:10px;
	font-size: 15px;
}

.bottom_sub li, .bottom_main li{
	list-style-type: none;
}

 .bottom_main li a{
	text-decoration: none;
	display: line-block;
	height: 30px;
	width:80px;
	width:5em;
	margin-left:20px;
	color:#fff;
	font-family: Corbel;
 }

 .bottom_main li a:hover{
 	color:#8797F0;
 }

 .bottom_main li{
 	float:left;
 }

 .bottom_sub li{
 	float: none;
 }

 .bottom_main_a{
 	font-size: 25px;
 }

  .contact_us{
 	float:right;
 	width: 300px;
 	height:90px;
 	margin-right:200px;
 	margin-top:0px;
 }

 .contact_us p{
 	font-size: 18px;
 	font-family: Calibri;
 	color:#fff;
 }

 #contact_us_title{
 	font-size:25px;
 }

 .bottom_pic{
 	float:right;
 	position: absolute;
 	right:20px;
 }

 .bottom_sub{
 	position: relative;
	/*left:-46px;*/
 }