*{
	margin: 0px;
	padding: 0px;
	box-sizing: border-box;
}
li{
	list-style: none;
}
a{
	text-decoration: none;
	color: #000;
}
a:hover{
	color: #c19f4f;
}
.header_div{
	width: 100%;
	height: 236px;
	background-image: url(../images/swf.jpg);
	background-size: cover;
	background-position: bottom;
	background-repeat:no-repeat
}
.header_box{
	width: 1200px;
	height: 100%;
	margin: 0 auto;
}
.header_box video{
	width: 1200px;
	height: 100%;
}
.nav_box{
	width: 100%;
	height: 50px;
	background-color: #1b74b1;
}
.nav_box ul{
	width: 1200px;
	height: 100%;
	line-height: 50px;
	margin: 0 auto;
	color: #fff;
}
.nav_box ul::after{
	display: block;
	content: "";
	clear: both;
}
.nav_box li.father{
	width: 150px;
	height: 50px;
	text-align: center;
	line-height: 50px;
	float: left;
	font-size: 16px;
	font-weight: bold;
	position: relative;
	font-family: 微软雅黑;
	color: #fff;
}
.nav_box li.father a{
	color: #fff;
}
.nav_box .li_item{
	width: 105px; 
	height: auto;
	position: absolute;
	z-index: 10;
	background-color: #1b74b1;
	display: none;
	left: 24px;
}
.li_item li{
	display: block;
	width: 100%;
	height: 42px;
	line-height: 42px;
	font-size: 16px;
	text-align: center;
}
.nav_box li.father:hover .li_item{
	display: block;
}
.search_box{
	width: 100%;
	height:35px;
	line-height: 35px;
	background-color:#ebebeb;
}
.search_div{
	width: 1200px;
	margin: 0 auto;
	text-align: right;
	font-size: 12px;
	line-height: 20px;
	padding-top: 5px;
	padding-right: 15px;
}
.search_input{
	height: 22px;
}
.sebut{
	float:right;
}