option = {
    title: {
        text: 'Treemap 示例'
    },
    series: [
        {
            name: 'Treemap',
            type: 'treemap',
            data: [
                {
                    name: '类别1',
                    value: 10,
                    children: [
                        { name: '子类别1-1', value: 5 },
                        { name: '子类别1-2', value: 3 },
                        { name: '子类别1-3', value: 2 }
                    ]
                },
                {
                    name: '类别2',
                    value: 8,
                    children: [
                        { name: '子类别2-1', value: 4 },
                        { name: '子类别2-2', value: 3 },
                        { name: '子类别2-3', value: 1 }
                    ]
                }
                // 可以添加更多的数据项和层级关系
            ],
            leafDepth: 2, // 叶子节点的层级深度，可选，默认为无穷大，表示所有节点都是叶子节点
            roam: true,   // 是否开启漫游，可以通过拖拽和缩放来浏览数据
            label: {
                show: true, // 是否显示标签
                position: 'inside' // 标签的位置，可选值为 'top', 'inside', 'bottom', 'left', 'right'
            }
        }
    ]
};