echarts 饼图标注 字体修改

option = {
  grid: {
    // 四周留白区域设置
    top: 20,
    right: 20,
    left: 20,
    bottom: 20,
    containLabel: true,
  },
  tooltip: {
    trigger: 'item',
    formatter: '{b} : {c} ({d}%)' // 展示百分比
  },
  series: [
    {
      type: 'pie',
      radius: ['40%', '60%'],
      avoidLabelOverlap: false,
      startAngle: 0, //起始角度
      data: [
        { 
          value: 0, 
          name: '正确率',
          label: {
            color: 'red'
          }
         },
        {
          value: 0, 
          name: '误报率',
          itemStyle: {
            normal: {
              color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                {offset: 0, color: '#00c0e4'},
                {offset: 0.5, color: '#0190e4'},
                {offset: 1, color: '#0249e4'}
              ]),
            },
          }
        },
        {
          value: 0, 
          name: '漏报率',
          itemStyle: {
            normal: {
              color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                {offset: 0, color: '#00c0e4'},
                {offset: 0.5, color: '#0190e4'},
                {offset: 1, color: '#0249e4'}
              ]),
            },
          }
        },
      ]
    }
  ]
};

效果：

官网文档地址：https://echarts.apache.org/zh/option.html#series-pie.label