滚动条悬浮改变宽度、高度、颜色

::-webkit-scrollbar{
//滚动条整体
            height: 9px !important;
            width: 9px !important;
        }

        ::-webkit-scrollbar-thumb {
//滚动条小方块
            border-radius: 0;
            border-style: dashed;
            background-color: rgba(157, 165, 183, 0.4);
            border-color: transparent;
            border-width: 1.5px;
            background-clip: padding-box;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: rgba(157, 165, 183, 0.7)
        }