.main-vis {
  position: relative;
  left: 0;
  top: 0;
  z-index: 100;
  width:100%;
  height: 100vh;
  overflow: hidden;
  background-image:url(/balletresearch/albums/abm00004199.jpg);
  background-size: cover;
  background-position: center;  
}

.main-vis .main-img img {
  width: 100% !important;
  height: auto !important;
}

.main-vis-logo {
  width: 317px;
  height: 251px;
  top: 50%;
  left:50%;
  -webkit-transform: translate(-50%,-50%);
  -ms-transform: translate(-50%,-50%);
  transform: translate(-50%,-50%);
  position: absolute;
}

.main-vis-logo img{
  max-width: 100%;
  height: auto;
}

p.scroll-btn {
  margin: 0 auto;
  position: absolute;
  z-index: 200;
  bottom: 60px;
  left: 50%;
  transform: translatex(-50%);
  cursor:pointer;
}

div#wrapper_in {
  position: absolute;
  width: 100%;
}

.main-img img{
  width: 100%;
  height:auto;
}

body#top {
  overflow-x: hidden;
}
@media screen and (max-width: 768px) {
/*p.scroll-btn {
  bottom: 80px;
}*/
#l-mainContents .main-img {
  margin-bottom: 15px;
}
}