echarts无法识别rem单位吗echarts 折线配置项内容和展示

页面布局都使用的rem单位，最后写好图表，发现尺寸非常小，无法变大

      option = {
    title: {
        text: '业务受理接口成功率实时情况（24小时内）',
        x: 'center',
        textStyle: {
            color: '#fff',
            fontSize: '14'
        }
    },
    color: ['red'],
    tooltip: {
        trigger: 'axis'
        /* formatter : "{b}: {c}(%)"*/
    },
    toolbox: {
        show: false
    },
    xAxis: [{
        type: 'category',
        boundaryGap: false,

        axisLabel: {
            show: true,
            interval: 1,
            textStyle: {
                color: '#4185EA',
                fontSize: '10'
            },
            /* formatter:function(value)
             {
                /!* if(value=="00:00"){
                     value="当:天";
                 }
                 return value.split(":").join("\n");*!/
             }*/
        },
        axisTick: {
            show: true,
            interval: 0
        },
        axisLine: {
            show: true,
            onZeroAxisIndex: '1',
            lineStyle: {
                color: '#4185EA',
                width: 1
            },
            symbol: ['none', 'arrow'],
            symbolSize: [5, 7]
        },
        splitLine: {
            show: false
        },
        data: []
    }],
    yAxis: [{
            type: 'value',
            name: '成功率(%)',
            position: 'left',
            axisTick: {
                show: true,
                interval: 0
            },
            axisLine: {
                show: true,
                lineStyle: {
                    color: '#4185EA'
                },
                symbol: ['none', 'arrow'],
                symbolSize: [5, 7]
            },
            axisLabel: {
                show: true,
                interval: 0,
                textStyle: {
                    color: '#4185EA'
                }

            },
            /*min: function(value) {
             return value.min>80?value.min:80;
             },*/
            min: '99',
            max: '100',

            splitLine: {
                show: false
            },
            data: []
        },
        {
            type: 'value',
            show: false,
            name: '成功率(%)',
            position: 'right',
            axisLine: {
                show: false
            },
            axisLabel: {
                show: false
            },
            min: '-0.5',
            max: '0.5',

            splitLine: {
                show: false
            },
            data: []
        }
    ],
    visualMap: {
        type: 'piecewise',
        bottom: 0,
        right: 'center',
        precision: 1, //设置小数精度，默认0没有小数
        orient: 'horizontal',

        pieces: [

            {
                gte: 0,
                lte: 99.5,
                color: '#FF0000',
                symbol: 'circle'
            }, {
                gt: 99.5,
                lte: 99.9,
                color: '#FFFF00',
                symbol: 'circle'
            }, {
                gt: 99.9,
                lte: 100,
                color: '#00FF00',
                symbol: 'circle'
            }
        ],
        outOfRange: {
            color: '#FF0000',
            symbol: 'circle'
        },
        textStyle: {
            color: '#fff',
            fontSize: '12'
        }
    },
    series: [{
            name: '业务接口成功率',
            type: 'line',
            data: [],
            symbol: 'circle', //拐点样式
            symbolSize: 6, //拐点大小
            showAllSymbol: true,
            itemStyle: {
                normal: {
                    lineStyle: {
                        width: 2 //折线宽度
                    }
                }
            },
            lineStyle: { //线颜色
                normal: {
                    color: '#DECF25'
                }
            },
            markLine: {
                silent: true,
                symbol: 'none',
                label: {
                    normal: {
                        show: true,
                        position: 'start'
                    }
                },
                lineStyle: {
                    normal: {
                        color: '#4185EA',
                        width: '0'
                    }
                },
                data: [{
                    yAxis: 99.5
                }]
            }
        },
        {
            name: '业务接口成功率',
            type: 'line',
            yAxisIndex: 1,
            data: [],
            symbol: 'circle', //拐点样式
            symbolSize: 6, //拐点大小
            showAllSymbol: true,
            itemStyle: {
                normal: {
                    lineStyle: {
                        width: 2 //折线宽度
                    }
                }
            },
            lineStyle: { //线颜色
                normal: {
                    color: '#DECF25'
                }
            }
        }
    ]
};