.activity-sel {
    padding: 40px 0;
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 1px solid #f5f5f5;
}


.activity-sel a {
    font-size: 14px;
    width: 120px;
    text-align: center;
    padding: 10px 0;
    border: 1px solid #eeeeee;
    margin: 0 10px;
    border-radius: 5px;
}

.activity-sel a:hover {
    background-color: #e23434;
    color: #ffffff;
}

.selasw {
    background-color: #e23434;
    color: #ffffff;
}





.develop-box {
    padding: 30px 0;
}

.develop-ul li {
    padding: 15px 0;
    font-size: 14px;
}



.introid {
    display: none;
}

.intro-ul li {
    padding: 10px 0;
    text-align: center;
}

.intro-ul li p {
    text-indent: 2em;
    font-size: 14px;
    text-align: left;
}

.intro-ul li>img {
    width: 60%;
    height: auto;
}


@media only screen and (max-width: 1340px) {

    .activity-sel {
        padding: 30px 0;
    }

    .develop-box {
        padding: 20px 0;
    }








}

@media only screen and (max-width: 769px) {

    .activity-sel {
        padding: .3rem 0;
    }

    .activity-sel a {
        font-size: 12px;
    }



    .develop-box {
        padding: .2rem .1rem;
    }

    .develop-ul li {
        padding: .15rem 0;
    }

    .intro-ul li>img {
        width: 95%;
    }
}