#i-athlete .parts_hover {
  display: block;
  position: relative;

  &:hover {
    img:not(.hover) {
      opacity: 0;

      @media (width <= 740px) {
        opacity: 1;
      }
    }

    img.hover {
      opacity: 1;
    }
  }

  img {
    transition: opacity 0.3s;
  }

  img:not(.hover) {
    position: relative;
    z-index: 1;
  }

  img.hover {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    z-index: 0;
  }
}