html, body {
  position: relative;
  height: 100%;
}
body {
  background: #000;
  font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
  font-size: 14px;
  color:#000;
  margin: 0;
  padding: 0;
}
.swiper-container {
  width: 100%;
  height: 100%;
}
.swiper-slide {
  text-align: center;
  font-size: 18px;
  background: #000;
  width: 256px;

}
.swiper-slide img {
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  -ms-transform: translate(-50%, -50%);
  -webkit-transform: translate(-50%, -50%);
  -moz-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  position: absolute;
  left: 50%;
  top: 50%;
}