.activites_index {
    margin: 100px 0 65px 0;
    position: relative;
}
.activite_name {
    line-height: 90px;
    text-align: center;
    background: #e57816;
    color: #FFF;
    font-size: 22px;
    text-transform: uppercase;
    text-decoration: none;
}
.activite_name a {
    color: #FFF;
    text-decoration: none;
}
.activite_content:hover {text-decoration: none;}
.activite_content:hover .activite_name {
    background: #18a5e1;
    transition: all 0.3s ease;
    -moz-transition: all 0.3s ease;
    -o-transition: all 0.3s ease;
    -webkit-transition: all 0.3s ease;
}
.activite_content {margin-bottom: 35px;}
.activite_content_middle {margin-top: 250px;}
.activites_index_title {
    font-weight: bold;
    font-size: 120px;
    color: #bbbbbb;
    line-height: normal;
    position: absolute;
    left: -18%;
    top: 600px;
    -webkit-transform: rotate(-90deg);
    -moz-transform: rotate(-90deg);
    -ms-transform: rotate(-90deg);
    -o-transform: rotate(-90deg);
    transform: rotate(-90deg);
    text-transform: uppercase;
}

.activite_content img {
    /*-webkit-filter: grayscale(100%);
    filter: grayscale(100%);*/
}
.activite_content:hover img {
    /*-webkit-filter: grayscale(0);
    filter: grayscale(0);
    transition: all 0.3s ease;
    -moz-transition: all 0.3s ease;
    -o-transition: all 0.3s ease;
    -webkit-transition: all 0.3s ease;*/
}
.sup_title_activities {
    position: absolute;
    top: 0;
    left: 70px;
}

@media (max-width: 1700px) {
  .sup_title_activities {display: none;}
}

@media (max-width: 991px) {
  .activite_name {font-size: 18px;}
}

@media (max-width: 767px) {
  .activite_content_middle {margin-top: 0;}
  .activite_name {
    line-height: 60px;
  }
  .activite_content img {
    margin: 0 auto;
    width: 100%;
    max-height: 500px;
    /*-webkit-filter: grayscale(0);
    filter: grayscale(0);*/
  }
  .activites_index {
    margin: 50px 0 25px 0;
    position: relative;
  }
}