.liter-num {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 5;
    background-color: var(--color-orange);
    color: #fff;
    border-radius: 50%;
    pointer-events: none;
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    line-height: 1;
}