/***********actualites**********/
  .act_item {
    width: 100%;
    display: block;
    height: 50%;
  }
    .act_item:nth-child(2n) .flex_div_strech{
      flex-direction: row-reverse;
    }
.img_act {
  overflow: hidden;
}
.frame_contet_act {
  background-color: #dedede;
}