index.js?e493:594 Uncaught ModuleParseError: Module parse failed: Unexpected character '@' (1:0)

[liaodalin19903]

在与next.js结合使用的时候报错：

index.js?e493:594 Uncaught ModuleParseError: Module parse failed: Unexpected character '@' (1:0)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file.

@root-entry-name: default;
| 
| @import './index-pure.less';

请问下这个问题是什么原因导致呢？