.header_box {
    height: 83px;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    z-index: 999;
		border-bottom:1px solid #fff;
}
.header_t									{width:1200px; margin:20px auto 10px auto;}
.header_t:after						{width:100%; display:block; clear:both; content:'';}
.header_logo							{width:160px; float:left;}
.header_gnb								{width:700px; float:right; }
.header_gnb:after					{width:100%; display:block; clear:both; content:'';}