https://echarts.apache.org/zh/option.html#xAxis.nameTextStyle
xAxis. nameTextStyle、

 yAxis: {
      type: 'value',
      //   max: -0.15,
      name: '沉降累计值/mm',
      nameTextStyle: {
        padding: [0, 0, 0, 10],
        color: '#93B8E2',
        fontSize: 12,
        fontFamily: 'Alibaba-PuHuiTi-R'
      },
      splitLine: {
        show: true,
        lineStyle: {
          type: 'dashed',
          width: 0.5
        }
      },
      axisLabel: {
        textStyle: {
          color: '#93B8E2',
          fontSize: 14,
          fontFamily: 'Alibaba-PuHuiTi-R'
        }
      }
    },