.about_h3 {
   text-align: left; 
}

.about_item_box {
    display: flex;
    justify-content: center;
    align-items: center;
}

.about_item_box .image {
    width: 50%;
    display: flex;
}

.about_item_box .text {
    display: flex;
    flex-wrap: wrap;
    flex: 1;
    padding: 2em;
    text-align: left;
}

.about_under_btn {
    margin: 40px 0 60px;
}

@media screen and (max-width: 480px) {
    .sp-none {
        display: none;
    }
    .about_h3 {
        text-align: center; 
     }
    .about_item_box.general {
        display: block;
        margin: 0 20px 20px;
    }
    .about_item_box.reversal {
        flex-direction: column-reverse;
        margin: 0 20px 20px;
    }
    .about_item_box .image {
        width: 100%;
        margin: 0 auto;
    }
    .about_item_box .text {
        display: block;
        padding: 1rem;
        text-align: left;
    }
}