@media screen and (max-width: 750px){#header{display:flex;justify-content:center;align-items:center;background-color:#fff;height:38px;margin:0 auto}#header .header_detail{margin-top:3px;margin-right:83px;font-size:10px}#header .logo{float:left;margin-right:30px}}@media screen and (min-width: 751px){#header{position:relative;background-color:#fff;width:1200px;height:70px;margin:0 auto}#header .header_detail{position:absolute;top:17px;left:99px}#header .logo{float:left;margin-right:19px}}