您可以将工具提示的showTitle选项设置为false

Instead of the CSS above to hide the title, you can set the showTitle option for the tooltip to false

tooltip: {
        isHtml: true,
        showTitle: false
    }

然后，您可以在工具提示中使用HTML标记以完全按照所需的方式显示工具提示.

Then you can use HTML markup in your tooltip to display the tooltip exactly the way you want.