.div_box01 {
    margin-bottom: 90px;
}

.caseTab {
    display: grid;
    grid-template-columns: repeat(3, auto);
    justify-items: center;
    gap: 20px;
    width: 100%;
    margin-bottom: 80px;
}

.caseTab li a {
    cursor: pointer;
}

.caseTab li a:hover {
    opacity: .7;
}

.tab_box {
    display: none;
}

.case01 {
    display: block;
}