/* body{background-color: #1b1b1b} */
/*====================导航*********/
.header{
	width: 100%;
	position: relative;
	z-index: 2;
	padding: 0 3px;
	margin-top: 50px;
}
.header .nav{
	-webkit-transition: 0.5s;
	-moz-transition: 0.5s;
	-o-transition: 0.5s;
	transition: 0.5s;
	height: 100%;
	line-height: 50px;
	display: block;
}
.header .navbar_nav li{
	/*float:left;*/
	position: relative;
	display: block;
}

.navbar_nav {
	white-space: nowrap;
}

.header .navbar_nav li:after{
	content: "";
	width: 0;
	height: 2px;
	background: orangered;
	position: absolute;
	bottom: 0;
	left: 0;
	transition: all 0.5s ease 0s;
}
.header .navbar_nav li:hover:after{
	width: 100%;
}
.header .navbar_nav li a{
	text-decoration: none;
	height: 100%;
	padding: 0 10px;
	display: inline-block;
	/* -webkit-transition: 0.5s;
	-moz-transition: 0.5s;
	-o-transition: 0.5s;
	transition: 0.5s; */
	color: #333;
	font-size: 17px;
	font-weight: bold;
}

.container {
	position: relative;
}

.header .navbar_nav li:hover a{
	color: orangered;
}
.header .navbar_nav li.dropdown{
	display: inline-block;
	position: relative;
}

.search-box {
	position: absolute;
	top: 53%;
	left: 85%;
	z-index: 3;
}

.header .navbar_nav li.dropdown .jt{
	width: 20px;
	height: 20px;
	background: url(i/top.png) no-repeat;
	background-size: 100% 100%;
	display: block;
}
.header .navbar_nav li.dropdown .dropdown_menu{
	display: none;
	position: absolute;
	top:50px;
	width: 100%;
	background: #fff;
	box-shadow: 0 15px 27px 0 rgba(167,165,165,0.38);
	width: 120%;
	left: -10%;
}
.header .navbar_nav li.dropdown .dropdown_menu a{
	width: 150px;
	font-size: 13px;
	text-align: center;
	background: #fff;
}
.header .navbar_nav li.dropdown:hover .dropdown_menu{
	display: block;
	background: #f3f3f3;
	-webkit-transition: 0.5s;
	-moz-transition: 0.5s;
	-o-transition: 0.5s;
	transition: 0.5s;
	white-space: normal;
	width: auto;
}
.header .navbar_nav li.dropdown:hover .dropdown_menu a{
	color: #666;
}
.header .navbar_nav li.dropdown:hover .dropdown_menu a:hover{
	color: #fff;
	background: orange;
}
/*白色背景的头部*/
.header.on{
	background: #fff;
	border-bottom: 1px solid #ccc;
}
.header.on .left .img1{
	display: none;
}
.header.on .left .img2{
	display: block;
}
.header.on .navbar_nav li a{
	color: #333;
}
.header.on .navbar_nav li:hover a{
	color: orangered;
}