#testimonials .carousel-3d-slide {
    /*  Old css  */ 
      display: -webkit-box;
      display: -ms-flexbox;
      display: flex;
      -webkit-box-flex: 1;
      -ms-flex: 1;
      flex: 1;
      -webkit-box-orient: vertical;
      -webkit-box-direction: normal;
      -ms-flex-direction: column;
      flex-direction: column;
      -webkit-box-pack: center;
      -ms-flex-pack: center;
      justify-content: center;
      text-align: center;
      background-color: #fff;
      padding: 10px;
      -webkit-transition: all 0.4s;
      transition: all 0.4s;
    }
    #testimonials .carousel-3d-slide.current {
      /*color: #fff;*/
      height: 300px;
    }