.principal_banner_wrapper {position: relative;}
.icon-scroll,
.icon-scroll:before {
  position: absolute;
  left: 50%;
}
.icon-scroll {
    width: 26px;
    height: 45px;
    bottom: 20px;
    box-shadow: inset 0 0 0 1px #fff;
    border-radius: 20px;
    z-index: 99;
    cursor: pointer;
    left: 50%;
    margin-left: -13px;
}
.icon-scroll:before {
    content: '';
    width: 2px;
    height: 6px;
    background: #fff;
    top: 7px;
    margin-left: -1px;
    border-radius: 4px;
    -webkit-animation-duration: 1.8s;
    animation-duration: 1.8s;
    -webkit-animation-iteration-count: infinite;
    animation-iteration-count: infinite;
    -webkit-animation-name: scroll;
    animation-name: scroll;
}
@-webkit-keyframes scroll {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    -webkit-transform: translateY(36px);
            transform: translateY(36px);
  }
}
@keyframes scroll {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    -webkit-transform: translateY(36px);
            transform: translateY(36px);
  }
}

.bloc_title_gamme {
    font-size: 38px;
    color: #3f8ee7;
    text-transform: uppercase;
    text-align: center;
    margin: 0 auto;
    display: table;
    font-weight: bold;
    letter-spacing: 1px;
    background: url(/Files/App_002/Images/title_motif.png) no-repeat left 50px;
    padding-left: 40px;
    line-height: 85px;
    margin-bottom: 100px;
    padding-bottom: 15px;
}
.bloc_title_gamme span {
    font-weight: lighter;
}

@media (max-width: 1200px) {
  .bloc_title_gamme {
    margin-bottom: 50px;
  }
}

@media (max-width: 991px) {
  .principal_banner_wrapper {
    margin-top: 100px;
  }
}

@media (max-width: 767px) {
 .bloc_title_gamme {
    font-size: 26px;
    margin-bottom: 30px;
 }
}

@media (max-width: 550px) {
  .bloc_title_gamme {
    font-size: 24px;
    margin-bottom: 30px;
    line-height: inherit;
    background: none;
    padding-left: 10px;
    padding-right: 10px;
    padding-bottom: 10px;
  }
}