footer .social-icons .telegram-icon{
    display: inline-block;
    position: relative;
    text-indent: -119988px;
    overflow: hidden;
    text-align: left;
    background-repeat: no-repeat;
    background-position: 50% 50%;
    width: 45px;
    height: 45px;
}
footer .social-icons .telegram-icon {
    background-image: url(https://www.pts.org.tw/public_images/icon_telegram_circle_.png);
    background-image: none, url(https://www.pts.org.tw/public_images/icon_telegram_circle_.svg);
}