eeeeee;
          background-size: 100% 100%;
    }

    .center {
      margin: 0;
      position: absolute;
      top: 50%;
      left: 50%;
      -ms-transform: translate(-50%, -50%);
      transform: translate(-50%, -50%);
    }

    .contain {
      display:block;
      width:100%; height:100%;
      object-fit: contain;
    }

    .stretch {
      display:block;
      width:100%; height:100%;
    }

    .cover {
      display:block;
      width:100%; height:100%;
      object-fit: cover;
    }

    .b