@media screen and (max-width: 1040px) {
  #contenant-box-index {
    display: flex;
    flex-direction: column;
    justify-content: center;
    margin-top: 20px;
  }

  .img-box-index1,
  .img-box-index3 {
    width: 100%;
    margin-bottom: 15px;
  }

  .img-box-index2,
  .img-box-index4 {
    width: 100%;
  }

  #presentation-apc {
    width: 90%;
    margin: 0 auto;
    text-align: center;
    margin-top: 20px;
  }
}