.navindex1 {
    padding: 0px 5.7rem;
}
.jindu{
    position: absolute;
    left: 0;
    top: 0;
    height: 4px;
    background: #e62129;
    width: 6.9rem;
    animation: jindutiao 3s linear ;
}
@-webkit-keyframes jindutiao {
   0% {
     width: 0;
 
  }
   100% {
    width: 6.9rem;
 
  }
  }

  @media (max-width: 768px){
    .navindex1 {
      padding: 0px 0px;
  }
  .jindu{
    position: absolute;
    left: 0;
    top: 0;
    height: 4px;
    background: #e62129;
    width:20%;
    animation: jindutiao 3s linear ;
  }
  @-webkit-keyframes jindutiao {
   0% {
     width: 0;
  
  }
   100% {
     width: 20%;
  
  }
  }
    }