.navindex1 {
    padding: 0px 5.7rem;
}
.jindu{
    position: absolute;
    left: 0;
    top: 0;
    height: 4px;
    background: #e62129;
    width: 12.3rem;
    animation: jindutiao 3s linear ;
}
@-webkit-keyframes jindutiao {
   0% {
     width: 6.9rem;
 
  }
   100% {
     width: 12.3rem;
 
  }
  }
  @media (max-width: 768px){
  .navindex1 {
    padding: 0px 0px;
}
.jindu{
  position: absolute;
  left: 0;
  top: 0;
  height: 4px;
  background: #e62129;
  width:80%;
  animation: jindutiao 3s linear ;
}
@-webkit-keyframes jindutiao {
 0% {
   width: 20%;

}
 100% {
   width: 80%;

}
}
  }