.header{
	background-color:#444;
	display: flex;
	flex-direction: column;
	position:relative;
	z-index: 999999;
	font-size:.12rem;
}
.logo {
	height:.65rem;
	padding:.12rem .2rem .13rem .13rem;
	display: flex;
	justify-content: space-between;
	align-items: center;
}
.logo .link_logo img{
	height:.4rem;
	width:1.26rem;
}
.nav_mark{
	width:.16rem;
	height:.16rem;
	background:url(../images/nav_mark.png) no-repeat;
	background-size:cover;
}
.nav{
	position: absolute;
	background:#444;
	width:100%;
	top:.65rem;
	display: none;

}
.nav a{
	color:#fff;
	line-height: .18rem;
	display: block;
	padding:.15rem 0 .15rem .2rem; 
	border-top:1px solid rgba(255, 255, 255, 0.1);
}
.click{
	background:url(../images/trj.png) no-repeat 3.5rem center;
	background-size:.07rem .12rem;
}
.product_presentation_dropdown div a{
	padding:0 0 .1rem .5rem; 
	border:0;
}
.logo .current{background:url(../images/close.png) no-repeat;background-size:.16rem .16rem;}
.click1{
	background:url(../images/tdj.png) no-repeat 3.5rem center;
	background-size:.12rem .07rem;
}