.sliderA {
  position: absolute;
  width: 100%;
  overflow: hidden;
  padding-bottom: 200px;
}
.sliderA .slider-row {
  width: 2956px;
  height: 300.5px;
  background-image: url(../img/clA.jpg);
  background-size: 2956px 300.5px;
  -webkit-animation: slide 50s linear infinite;
          animation: slide 50s linear infinite;
}

@-webkit-keyframes slide {
  from {
    background-position-x: 0;
  }
  to {
    background-position-x: -2956px;
  }
}

@keyframes slide {
  from {
    background-position-x: 0;
  }
  to {
    background-position-x: -2956px;
  }
}