设置flex ColumnChart中ColumnSeries字体大小等样式

flex3中

        <mx:Style>
            LegendItem {
                color: black;
                font-family: Arial;
                fontSize: 16;
                fontWeight: normal;
            }
        </mx:Style>

flex4中

	<fx:Style>
		@namespace s "library://ns.adobe.com/flex/spark";
		@namespace mx "http://www.adobe.com/2006/mxml";
		mx|LegendItem {
			color: black;
			font-family: Arial;
			fontSize: 20;
			fontWeight: normal;
		}
	</fx:Style>