@media screen and (max-width: 768px){

    h2{
        font-size: 20px;
        padding-top: 10px;
        padding-left: 5px;
        padding-right: 5px;
        margin-bottom: 5px;
    }

    #contents{
        width: 100%;
    }

    .ft{
        width: auto;
        color: #222;
        font-size: 15px;
        float: none;

        padding-left: 5px;

        padding-top: 15px;
        padding-bottom: 15px;

        background-color: rgba(124, 140, 151, 0.73);

    }
    .fd{
        width: auto;
        font-size: 15px;
        float: none;

        padding-left: 5px;


        padding-top: 15px;
        padding-bottom: 15px;

    }
    .btn_box{
        width: 100%;
        text-align: center;
        margin-top: 20px;
    }

    .btn {
        font-size:18px;
        padding-top: 10px;
        padding-bottom: 10px;
        margin: 20px auto;

    }
    .en_txt{
        font-size:75%;
    }
    .h2_en_txt{
        font-size:75%;
    }
}