@media all and (max-width:650px){
  .text{
    columns: 1;
  }
  .jt,.et{
    text-align: center;
    padding: 0;
  }
  .et{
    padding-top: 50px;
  }
}

@media all and (max-width: 330px){
  .three li{
    padding: 20px 5px;
}