echars line 底部图例强制不换行（滚动），修改图例样式

{
      grid: {
        left: '5px',
        right: '10px',
        top: '10px',
        bottom: '40px',
        containLabel: true
      },
      tooltip: {
        trigger: 'item',
        backgroundColor: 'rgba(0,0,0,0)',
        padding: 0,
        formatter(params) {
          return `
            <div style="height: 80px; box-shadow: 0 0 5px 0 rgba(0,0,0,0.2); border-radius: 5px;">
              <p style="color: ${CONFIG.COLOR[params.color]}; background: ${params.color}; height: 38px; padding: 0 16px; line-height:38px; border-radius: 5px 5px 0 0;">${params.seriesName}</p>
              <p style="height: 42px; line-height: 42px; text-align: center; color: #303133; border-radius: 0 0 5px 5px; padding: 0 16px; background: #fff;">
                <span>${params.name}：</span>
                <span style="font-weight: 600;">${util.comma(params.value)}</span>
              </p>
            </div>
          `
        }
      },
      legend: {
        type:'scroll', //图例强制不换行（滚动）
        data: option.legend,
        bottom: 5,
        icon: 'roundRect',//修改图例样式
        itemWidth:10, //修改图例 宽
        itemHeight:12 //修改图例 高
      },
      xAxis: {
        // boundaryGap: false,
        data: option.xAxis,
        axisLabel: {
          textStyle: {
            color: '#797878'
          }
        },
        axisLine: {
          lineStyle: {
            color: "#ececec"
          }
        }
      },
      yAxis: {
        splitLine: {
          lineStyle: {
            color: '#ececec'
          }
        },
        axisTick: {
          show: false
        },
        axisLine: {
          show: false
        },
        axisLabel: {
          textStyle: {
            color: '#797878'
          }
        },
        type: 'value'
      },
      series: option.series
    }