::-webkit-scrollbar-thumb {
        /* iScroll CSS, thanks */
        background-color: rgba(0, 0, 0, 0.5);
        border: 1px solid rgba(255, 255, 255, 0.9);
        border-radius: 3px;
    }
    ::-webkit-scrollbar-thumb:window-inactive {
        background-color: rgba(0, 0, 0, 0.6);
    }