.acms-entry blockquote.letter {
    position: relative;
    margin: 2em auto;
    padding: 44px 20px 20px;
    padding-top: calc(320 / 1000 * 100%);
    border: 1px solid #c66e6e;
    background: url(../images/letter.png) top center no-repeat;
    max-width: 510px;
    border-radius: 5px;
}
.acms-entry blockquote.letter:before,
.acms-entry blockquote.letter:after {
    content: none;
}


@media screen and (max-width: 480px) {
    .acms-entry blockquote.letter {
        background-size:95% auto;
    }
    .acms-entry blockquote.letter {
        padding: 36px 10px;
        font-size: 95%;
    }
}