.header_t									{width:1200px; margin:15px auto;}
.header_t:after						{width:100%; display:block; clear:both; content:'';}
.header_t img		{max-width:100%; height:auto; width:210px}
.header_logo							{float:left;}
.header_logo a {display: flex;}
.header_gnb								{ float:right; }
.header_gnb:after					{width:100%; display:block; clear:both; content:'';}