neo4j和neovis.js图片能显示，但是节点和关系的字体显示不出来

neo4j和neovis.js
图片能显示，但是节点和关系的字体显示不出来，能帮看看吗，这是什么情况
img

下面是源代码


```html
<!doctype html>
<html>
<head>
    <title>Neovis.js Simple Example</title>
    <style type="text/css">
        html, body {
            font: 16pt arial;
        }

        #viz {
            width: 900px;
            height: 700px;
            border: 1px solid lightgray;
            font: 22pt arial;
        }
    </style>
    <script src="https://unpkg.com/neovis.js@2.0.2"></script>
    <script
            src="https://code.jquery.com/jquery-3.2.1.min.js"
            integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4="
            crossorigin="anonymous"></script>
</head>
<script type="text/javascript">

    let neoViz;

    function draw() {
        const config = {
            containerId: "viz",
            neo4j: {
                serverUrl: 'bolt://localhost:7687',
                serverUser: 'neo4j',
                serverPassword: 'yanwei1003456/*',
            },
            labels: {
                FactorsAffectingLifeSpan: {
                    caption: 'rocks' ,
                    size:'pagerank',
                    community:'community',
                    font: { size: 15, color: '#606266' },
                        },
                Rocktype: {
                    caption: 'shale',
                    size:'pagerank',
                    community:'community',
                    font: { size: 10, color: '#606266' },
                }
            },
            relationships: {
                IsIncluding: {
                    caption: true,
                    thickness:'weight',
                    font: { size: 12, color: '#606266' }
                }
            },
            
            initialCypher: 'MATCH (n)-[r:IsIncluding]->(m) RETURN *'
        };

        neoViz = new NeoVis.default(config);
        neoViz.render();
        console.log(neoViz);
    }
</script>
<body onload="draw()">
<div id="viz"></div>
</body>
</html>

```

在labels和relationships中配置的font属性要生效,需要在CSS中定义对应的选择器:
css

.FactorsAffectingLifeSpan {
  font-size: 15px; 
  color: #606266;
}

.Rocktype {
  font-size: 10px;
  color: #606266;  
}

.IsIncluding {
  font-size: 12px;
  color: #606266;
}