html {
    /**
     * track 轨道  
     * thumb 滑块
     */
    --fbi-scrollbar-width: 12px;
    --fbi-scrollbar-height: 12px;
    --fbi-scrollbar-track-background-color: transparent;
    --fbi-scrollbar-track-background-color-no_transparent: #b7b6b6;
    --fbi-scrollbar-track-background-color-hover: #b7b6b6;
    --fbi-scrollbar-thumb-background-color: #949494;
    --fbi-scrollbar-thumb-background-color-hover: #737373;
}