echarts饼图

option = {
    tooltip: {
        trigger: 'item',
        formatter: '{b}: {c} ({d}%)',
    },
    graphic:{
        type:'text',
        left:'center',
        top:'center',
        z:2,
        zlevel:100,
        style:{
            text:'50%',
            x:200,
            y:200,
            textAlign:'center',
            fill:'#FF5B5C',
            width:600,
            height:60,
            fontSize:50
        }
    },
    series: [
        {
            name: '访问来源',
            type: 'pie',
            radius: ['50%', '70%'],
            avoidLabelOverlap: false,
            label: {
                show: false,
                position: 'center'
            },
            emphasis: {
                label: {
                    show: false,
                    fontSize: '30',
                    fontWeight: 'bold'
                }
            },
            labelLine: {
                show: false
            },
            data: [
                {value: 335, name: '已使用机柜'},
                {value: 310, name: '空余机柜'}
            ]
        }
    ],
    color : [ '#FF9495', '#212426'],
};

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