富文本标签实现文本高亮echarts scatter配置项内容和展示

想在富文本标签中实现鼠标悬停高亮,当鼠标滑动到文字时高亮,但是无法使用emphasis,怎么才能实现呢

配置项如下
      option = {
    series: [
        {
            type: 'scatter',
            data: [[0,0]],
            symbolSize: 1,
            label: {
               
                normal: {
                    show: true,
                    formatter: [
                        '#.第一段描述',
                        '#.第二段描述',
                        '#.第三段描述',
                    ].join('\n'),
                    backgroundColor: 'rgb(0,43,92)',
                    borderWidth: 2,
                    borderRadius: 5,
                    padding: 10,
                    color: '#fff',
                    fontSize: 14,
                    shadowBlur: 3,
                    shadowColor: '#fff',
                    shadowOffsetX: 0,
                    shadowOffsetY: 3,
                    lineHeight: 34,
                    rich: {
                        term: {
                        	fontWeight: 'bold',
                            fontSize: 25,
                            color: 'rgb(199,86,85)'
                        },
                        term1: {
                        	fontWeight: 'bold',
                            fontSize: 20,
                            color: 'yellow'
                        },
                        fregment1: {
                            backgroundColor: '#000',
                            color: 'yellow',
                            padding: 5
                        },
                        fregment2: {
                            backgroundColor: '#339911',
                            color: '#fff',
                            borderRadius: 15,
                            padding: 5
                        }
                    }
                }
               
               
               
               
               
               
                
            }
        }
    ],
    xAxis: {
        axisLabel: {show: false},
        axisLine: {show: false},
        splitLine: {show: false},
        axisTick: {show: false},
        min: -1,
        max: 1
    },
    yAxis: {
        axisLabel: {show: false},
        axisLine: {show: false},
        splitLine: {show: false},
        axisTick: {show: false},
        min: -1,
        max: 1
    }
};
    
截图如下