.card {
  position: relative;
  width: 800px;
  height: 200px;
  overflow: hidden;
}

.card::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  z-index: 900;
  display: block;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.0);
}

.card_part {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 7;
  display: flex;
  align-items: center;
  width: 100%;
  height: 100%;
  transform: translateX( 800px );
  background-image: url( https://systemtools.asia.srv.br/common/_imagens/Slide1.jpg?raw=true );
  background-size: cover;
  background-repeat: no-repeat;
  animation: opaqTransition 20s cubic-bezier(0, 0, 0, 0.97) infinite;
}

.card_part.card_part-two {
  z-index: 6;
  background-image: url( https://systemtools.asia.srv.br/common/_imagens/Slide2.jpg?raw=true );
  background-size: cover;
  background-repeat: no-repeat;
  animation-delay: 5s;
}

.card_part.card_part-three {
  z-index: 5;
  background-image: url( https://systemtools.asia.srv.br/common/_imagens/Slide3.jpg?raw=true );
  background-size: cover;
  background-repeat: no-repeat;
  animation-delay: 10s;
}

.card_part.card_part-four {
  z-index: 4;
  background-image: url( https://systemtools.asia.srv.br/common/_imagens/Slide4.jpg?raw=true );
  background-size: cover;
  background-repeat: no-repeat;
  animation-delay: 15s;
}

@keyframes opaqTransition {
  3% { transform: translateX( 0 ); }
  25% { transform: translateX( 0 ); }
  28% { transform: translateX( -800px ); }
  100% { transform: translateX( -800px ); }
}