.decorative-box {
    position: relative;
    background-color: #74b9ff;
    color: white;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}
.decorative-box::before {
    content: "";
    position: absolute;
    top: -10px;
    left: 20px;
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 10px solid #74b9ff;
}