.main_visual {
    height: 450px;
}

.main_visual .slick-list, .main_visual .slick-track {
    height: 100%;
}

.main_visual .slick-slide {
    position: relative;
    overflow: hidden;
}

.main_visual img {
    height: 100%;
    width: auto;
    max-width: none;
    position: absolute;
    right:50%;
    bottom:50%;
    -webkit-transform: translate(50%,50%);
    transform: translate(50%,50%);
}