@media only screen and (max-width: 768px){/*小屏*/
#w_fvideo-1576303488095 {
  margin-top:0px!important;
  }
  #w_grid-1569297114410{
  background:#000;
  }

}

@media only screen and (min-width: 769px){/*大屏*/

#w_fvideo-1576303488095 {
  margin-top:-250px!important;
  }
  #w_grid-1569297114390{
  margin-top:-680px!important;
  }
}