body {
  font-family: 'Koburina Gothic W3 JIS2004';
}

@media (max-width: 640px) {
    body, html {
        width: 370px;
        margin: auto;
		min-width: auto;
    }
}

@media (min-width: 641px) {
    #talk_body dt, .info_taidan_txt dt {
        width: 25%;
        padding: 0 2% 0 0;
        font-weight: bold;
        text-align: right;
        box-sizing: border-box;
        line-height: 2em;
        letter-spacing: .1em;
        white-space: nowrap;
    }
}