p.txt-end {
    color: #ff1910;
    line-height: 1.3;
    margin: 0 auto;
    padding: 0 0 20px 0;
    font-size: 1.8em;
    text-align: center;
    font-weight: bold;
}

@media screen and (max-width: 768px) {
    p.txt-end {
        font-size: 1.2em;
    }
}