.about-section{
  margin-top: 240px;
  width: 100%;
  height: 1000px;
  position: relative;
  display: inline-flex;
  overflow: hidden;
  background-color: rgba(0,0,0,.5);
}
.about-sub-section{
  position: relative;
  width: 40%;
  height: 100%;
  z-index: 1;
  background-position: center center;
  background-size: cover;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 3s;
}
.about-sub-section-text{
  padding-left: 20px;
  padding-right: 20px;
  display: flex;
  align-items:center;
  justify-content:left;
  /*border-left: 5px solid #ffffff;*/

  position: relative;
  width: 60%;
  height: 100%;
}
.about-sub-section-text > div > h2{
  text-align: justify;
  margin-bottom: 20px;
}