.contactArea >.clearfix {
    display: flex;
}
@media(max-width: 767px){
    .l-main {
        margin-top: 70px;
    }
    .content {
        width: 100%;
        margin-top: 0;
        padding-top: 40px;
        padding-left: 20px;
        padding-right: 20px;
    }
    .contactArea >.clearfix {
        flex-direction: column;
    }
    #corporation h3, #recruit h3, .faqArea h3, .usageArea h3, .privacyArea h3 {
        width: 100%;
    }
    .contactArea .cntColumn {
        margin: 0 auto 24px;
    }
}