立达聚焦放大，采用borderWidthecharts 折线配置项内容和展示

      option = {
    backgroundColor: '#080b30',
    title: {
        text: '立达聚焦放大，采用borderWidth',
        textStyle: {
            align: 'center',
            color: '#fff',
            fontSize: 20,
        },
        top: '5%',
        left: 'center',
    },
    tooltip: {
        trigger: 'axis',
        axisPointer: {
            lineStyle: {
                color: {
                    type: 'linear',
                    x: 0,
                    y: 0,
                    x2: 0,
                    y2: 1,
                    colorStops: [{
                        offset: 0,
                        color: 'rgba(0, 255, 233,0)'
                    }, {
                        offset: 0.5,
                        color: 'rgba(255, 255, 255,1)',
                    }, {
                        offset: 1,
                        color: 'rgba(0, 255, 233,0)'
                    }],
                    global: false
                }
            },
        },
    },
    grid: {
        top: '15%',
        left: '5%',
        right: '5%',
        bottom: '15%',
        // containLabel: true
    },
    xAxis: [{
        type: 'category',
        axisLine: {
            show: true
        },
        splitArea: {
            // show: true,
            color: '#f00',
            lineStyle: {
                color: '#f00'
            },
        },
        axisLabel: {
            color: '#fff'
        },
        splitLine: {
            show: false
        },
        boundaryGap: false,
        data: ['A', 'B', 'C', 'D', 'E', 'F'],

    }],

    yAxis: [{
        type: 'value',
        min: 0,
        // max: 140,
        splitNumber: 4,
        splitLine: {
            show: true,
            lineStyle: {
                color: 'rgba(255,255,255,0.1)'
            }
        },
        axisLine: {
            show: false,
        },
        axisLabel: {
            show: false,
            margin: 20,
            textStyle: {
                color: '#d1e6eb',

            },
        },
        axisTick: {
            show: false,
        },
    }],
    series: [
        {
            name: '注册总量',
            type: 'line',
            smooth: false, //是否平滑
            showAllSymbol: false,
            // symbol: 'image://./static/images/guang-circle.png',
            symbol: 'circle',
            symbolSize: 15,
            emphasis:{
                itemStyle:{
                     borderWidth: 20,
                }
            },
            lineStyle: {
                normal: {
                    color: "#00ca95",
                    shadowColor: 'rgba(0, 0, 0, .3)',
                    shadowBlur: 0,
                    shadowOffsetY: 5,
                    shadowOffsetX: 5,
                },
            },
            label: {
                show: false,
                position: 'top',
                textStyle: {
                    color: '#00ca95',
                }
            },

            itemStyle: {
                color: "#00ca95",
                borderColor: "#00ca95",
                borderWidth: 0,
                shadowColor: 'rgba(0, 0, 0, .3)',
                shadowBlur: 0,
                shadowOffsetY: 112,
                shadowOffsetX: 1112,
            },
            tooltip: {
                show: false
            },
            data: [281.55, 398.35, 214.02, 179.55, 289.57, 356.14, ],
        },
    ]
};