parallax.css in Parallax Toolkit 7.3

.parallax-block {
  overflow: hidden;
}

.parallax-block .parallax-image {
  position: absolute;
          transition: all 0.1s ease;
       -o-transition: all 0.1s ease;
     -moz-transition: all 0.1s ease;
  -webkit-transition: all 0.1s ease;
}

.parallax-block .content {
  position: relative;
}