body {
    font-family: A1 Gothic R JIS2004;
}

@media screen and (min-width: 641px) {
    #index_nav {
        display: none;
    }
    #talk_wrap h2 {
        display: none;
    }
    #talk_body .txt_box {
        margin: 20px auto 40px auto;
        min-width: 700px;
    }
    #talk_body .txt_box .desc {
        max-width: calc(100% - 60px);
    }
    #talk_body .txt_box .desc p {
        margin: 0 0 1em 0;
    }
    #talk_body .txt_box .pic {
        margin: 0 auto 20px auto;
    }
    #talk_wrap .info_img {
        text-align: center;
    }
}

@media screen and (max-width: 640px) {
    #yodogawa p {
        margin: 0 0 1em 0;
        line-height: 2em;
        font-size: 1rem;
    }
    #talk_body .txt_box .desc p {
        margin: 0 0 1em 0;
        font-size: 1rem;
    }
    #index_nav {
        display: none;
    }
    #talk_wrap h2 {
        display: none;
    }
    #talk_body .txt_box {
        padding: 35px 15px 35px 15px;
    }
}