成功解决：Module build failed: Error: Node Sass does not yet support your current environment: Windows 64

Module build failed: Error: Node Sass does not yet support your current environment: Windows 64-bit with Unsupported runtime (83)
For more information on which environments are supported please see:
https://github.com/sass/node-sass/releases/tag/v4.7.2
    at module.exports (D:\Study\MyAllProject\JavaProject2\ITstudyUI\xc-ui-pc-sysmanage\node_modules\node-sass\lib\binding.js:13:13)
    at Object.<anonymous> (D:\Study\MyAllProject\JavaProject2\ITstudyUI\xc-ui-pc-sysmanage\node_modules\node-sass\lib\index.js:14:35)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
    at Module.load (internal/modules/cjs/loader.js:928:32)
    at Function.Module._load (internal/modules/cjs/loader.js:769:14)
    at Module.require (internal/modules/cjs/loader.js:952:19)
    at require (internal/modules/cjs/helpers.js:88:18)
    at Object.<anonymous> (D:\Study\MyAllProject\JavaProject2\ITstudyUI\xc-ui-pc-sysmanage\node_modules\sass-loader\lib\loader.js:3:14)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
    at Module.load (internal/modules/cjs/loader.js:928:32)
    at Function.Module._load (internal/modules/cjs/loader.js:769:14)
    at Module.require (internal/modules/cjs/loader.js:952:19)
    at require (internal/modules/cjs/helpers.js:88:18)
    at loadLoader (D:\Study\MyAllProject\JavaProject2\ITstudyUI\xc-ui-pc-sysmanage\node_modules\loader-runner\lib\loadLoader.js:13:17)

sass不支持当前的环境，那么在当前环境重新安装一下就好了

先卸载：（如果卸载不成功，直接找到node-sass文件夹，删除）

 npm uninstall --save node-sass 

再安装

npm install --save node-sass

或

    
cnpm install --save node-sass 

问题就解决了