使用HighCharts更改向下钻取时的X轴标签

Highcharts.chart('container', {
    chart: {
        type: 'column'
    },
    title: {
        text: 'Sales by Product'
    },
    xAxis: {
        type: 'category'
    },
    yAxis: {
        title: {
            text: 'Sales'
        }
    },
    series: [{
        name: 'Products',
        colorByPoint: true,
        data: [{
            name: 'Total',
            y: 100,
            drilldown: 'product1'
        }],
        tooltip: {
            headerFormat: '<span style="font-size:11px">{series.name}</span><br>',
            pointFormat: '<span style="color:{point.color}">{point.name}</span>: <b>{point.y:.2f}</b> of total<br/>'
        }
    }],
    drilldown: {
        series: [{
            id: 'product1',
            name: 'Product Details',
            data: [
                ['Product A', 40],
                ['Product B', 30],
                ['Product C', 30]
            ],
            xAxis: {
                labels: {
                    formatter: function () {
                        // 自定义 X 轴标签
                        return 'Detail: ' + this.value;
                    }
                }
            }
        }]
    }
});