.nav{
	width:100%;
	height:70px;
/* 	background:#fff; */
	z-index: 9997;
    overflow: visible;
    position: fixed;
    top: 0;
/* 	box-shadow: 0 1px 1px #9e9e9e; */
	webkit-box-shadow:0 1px 1px #9e9e9e; 
	moz-box-shadow: 0 1px 1px #9e9e9e;
	ms-box-shadow:0 1px 1px #9e9e9e;
	o-box-shadow:0 1px 1px #9e9e9e;
}
.shadow_h{
	box-shadow: 0 1px 4px #cecece;
	webkit-box-shadow:0 1px 4px #cecece; 
	moz-box-shadow: 0 1px 4px #cecece;
	ms-box-shadow:0 1px 4px #cecece;
	o-box-shadow:0 1px 4px #cecece;
}
.nav_cont{
	width:1200px;
	position:relative;
	margin: 0 auto;
    height: 70px;
	color: #fff;
}
.bttc_logo{
	float:left;
	position: relative;
	z-index:9999 !important;
}
.bttc_logo img{
	width:100%;
}
.nav_menu{
	float:right;
	width:auto;
	height:70px;
	font-size:16px;
	color: #303036;
}
@media (min-width: 768px)
.nav_menu {
    float: left !important;
}
.list_line li{
	float: left;
    line-height: 66px;
	height:66px;
	border-top:4px solid transparent;
	display: inline-block;
	text-align:center;
	margin:0 20px;
	padding:0 10px;
	cursor:pointer;
}
.list_line li:hover{
	border-top:4px solid #e02d2f !important;
	color:#e02d2f !important;
}
.list_line li a{
	letter-spacing:2px;
	font-weight:500;
}
.nav_choosed{
	border-top:4px solid #e02d2f !important;
}
.nav_choosed a{
	color:#e02d2f !important;
	top:-4px !important;
}
.clearfix:before, .clearfix:after {
    content: "";
    display: table;
}
.clearfix:after{
    clear: both;
}
.clearfix{
    *zoom: 1;/*ie6,7*/
}
.long-line{
	width:94%;
	min-width:910px;
	margin-top:20px;
	margin-left:auto;
	margin-right:auto;
	background:#e3e3e3;
	height:1px;
}
.elevator-item{
	position: fixed;
    right: 25px;
    bottom: 30px;
    z-index: 99992;
    -webkit-transition: opacity .4s ease-in-out;
    -moz-transition: opacity .4s ease-in-out;
    -o-transition: opacity .4s ease-in-out;
    opacity: 1;
}
#elevator{
	display: block;
    margin-bottom: 5px;
    width: 60px;
    height: 46px;
    border-radius: 2px;
    background:url(../index/backtop.png) no-repeat center center;
    background-color: #e02d2f;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(0,0,0,.2);
}