关于#echarts#的markLine问题，如何解决？

echarts的markLine，想让线条是面积样式，线下面是一块带颜色的面积。怎么设置啊？我写成这样没效果：

这种效果？
line 没有 areaStyle属性

Documentation - Apache ECharts ECharts, a powerful, interactive charting and visualization library for browser https://echarts.apache.org/zh/option.html#series-line.markLine.lineStyle

option = {
  xAxis: {
    type: 'category',
    boundaryGap: false,
    data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
  },
  yAxis: {
    type: 'value'
  },
  series: [
    {
      data: [820, 932, 901, 934, 1290, 1330, 1320],
      type: 'line',
      areaStyle: {
        color:"red"
      }
    }
  ]
};