.main-section ul li::before {
    position: absolute;
    left: 0;
    content: "";
    display: inline-block;
    width: 24px;
    height: 24px;
    background-image: url(/fileadmin/assets/images/arrows/freccina_120_azzurra.svg);
    background-repeat: no-repeat;
    background-size: contain;
}