.landing-img {
    width: 400px;
    height: 500px;
    margin-left:-30px;
  }

.padding-landing{
  padding-top:300px;
}
@media screen and (min-width: 480px) {
    .landing-img {
      width: 100%;
      height: 700px;
      margin-top:-20px; margin-left:-20px;
    }

    .padding-landing{
      padding-bottom:300px;
    }
  }