.happy-customer {
  .slick-slide {
    & > div {
      & > div {
        position: relative;
        overflow: hidden;
        &::after {
          position: absolute;
          top: -1000px;
          left: 0;
          transition: background 0.3s ease-in-out;
          background: #e9ffec;
          width: 100%;
          height: 100%;
          content: '';
        }

        & > * {
          position: relative;
          z-index: 10;
        }
      }
    }

    &.slick-current {
      & > div {
        & > div {
          &::after {
            top: 0px;
          }
        }
      }
    }
  }
}