#side-navi-plan4 a#side_aboutlink2a img {
    width: 100%;
    max-width: 219px;
    height: auto;
    display: block;
    margin: 0 auto 20px;
    transition: .3s;
}


#side-navi-plan4 a#side_aboutlink2a img:hover {
    opacity: 0.8;
}