.logostyle{height:70px}@media all and (max-width: 768px){.logostyle{width:100px}}@media all and (min-width: 768px){.zidingyi{position:fixed;left:0px;top:20%;z-index:99999999}}@media all and (max-width: 768px){.zidingyi{position:fixed;right:0px;bottom:20px;z-index:99999999}}@media all and (max-width: 1200px){.toplogin{display:none}}