hexo NexT How to set the center of the picture

This method has no effect:

<div align=center>
    <img src="https://img2018.cnblogs.com/blog/1629545/201905/1629545-20190525105700146-1378074619.jpg" style="zoom:50%"/>
</div>

This method works:

<img src="https://img2018.cnblogs.com/blog/1629545/201905/1629545-20190525105700146-1378074619.jpg" style="zoom:50%;margin:auto;"/>

That is to add in stylemargin:auto;