.topNav{height:12.26667vw;position:relative;width:100vw;z-index:10}.topNav .wraper{align-items:stretch;background:#fff;box-sizing:border-box;display:flex;flex:none;height:12.26667vw;position:fixed;width:100%}.topNav .wraper:after{background:#ccc;border-bottom:1px solid #999;bottom:-1px;content:"";height:.26667vw;left:0;position:absolute;transform:scaleY(.5);width:100%;z-index:10}.topNav .side{flex:none;width:13.33333vw}.topNav .side,.topNav .tcenter{align-items:center;display:flex;justify-content:center}.topNav .tcenter{flex:1}.topNav .logo{flex:none;height:4.8vw;width:auto}.topNav .goback{border-bottom:.53333vw solid transparent;border-left:.53333vw solid var(--keyColor);border-right:.53333vw solid transparent;border-top:.53333vw solid var(--keyColor);height:2.4vw;transform:rotate(-45deg);width:2.4vw}