FAQ

Треуголник

blockquote {
    background-color: green;
    position: relative;
    color: white;
    padding: 15px 25px;
    margin: 10px 10px 0;
}

blockquote:after {
    border: 15px solid;
    border-color: green transparent transparent;
    top: 100%; left: 10px;
    width: 0; height: 0;
    position: absolute;
    content: '';
}