eCharts的曲线图，如何让曲线发光呢？
找了好久都没找到
类似这样的

深色背景加浅色阴影就能衬托出发光效果了

option = {
  backgroundColor: '#212529',
  textStyle: {color: '#fff'},
  xAxis: {
    type: 'category',
    data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'],
    splitLine: {
      show: true,
      lineStyle: {
        type: 'dashed',
      },
    },
  },
  yAxis: {
    type: 'value',
    splitLine: {
      show: false,
    },
  },
  series: [{
    data: [820, 932, 901, 934, 1290, 1330, 1320],
    type: 'line',
    smooth: true,
    showSymbol: false,
    lineStyle: {
      shadowColor: '#fff',
      shadowBlur: 10,
      color: {
        type: 'linear',
        colorStops: [
          {offset: 0, color: '#fff'},
          {offset: 1, color: 'yellow'},
        ],
      },
    },
  }],
};