我是Vue和Webpack的新手 该项目正在我的开发服务器上运行，在我运行
时效果很好npm run dev
但是当我跑步
npm run build
正在产生以下错误
Error processing file: static/css
/app.81fa529b08a5e9b00d3a8b61096d58b1.css
(node:8608) UnhandledPromiseRejectionWarning: CssSyntaxError: I:\projects\Vue\getit\static\css\app.81fa529b08a5e9b00d3a8b61096d58b1.css:104:21: Unknown word
at Input.error (I:\projects\Vue\getit\node_modules\optimize-css-assets-webpack-plugin\node_modules\postcss\lib\input.js:130:16)
at Parser.unknownWord (I:\projects\Vue\getit\node_modules\optimize-css-assets-webpack-plugin\node_modules\postcss\lib\parser.js:563:22)
at Parser.decl (I:\projects\Vue\getit\node_modules\optimize-css-assets-webpack-plugin\node_modules\postcss\lib\parser.js:235:16)
at Parser.other (I:\projects\Vue\getit\node_modules\optimize-css-assets-webpack-plugin\node_modules\postcss\lib\parser.js:133:18)
at Parser.parse (I:\projects\Vue\getit\node_modules\optimize-css-assets-webpack-plugin\node_modules\postcss\lib\parser.js:77:16)
at parse (I:\projects\Vue\getit\node_modules\optimize-css-assets-webpack-plugin\node_modules\postcss\lib\parse.js:17:12)
at new LazyResult (I:\projects\Vue\getit\node_modules\optimize-css-assets-webpack-plugin\node_modules\postcss\lib\lazy-result.js:60:16)
at Processor.<anonymous> (I:\projects\Vue\getit\node_modules\optimize-css-assets-webpack-plugin\node_modules\postcss\lib\processor.js:138:12)
at Processor.process (I:\projects\Vue\getit\node_modules\optimize-css-assets-webpack-plugin\node_modules\postcss\lib\processor.js:117:23)
at Function.creator.process (I:\projects\Vue\getit\node_modules\optimize-css-assets-webpack-plugin\node_modules\postcss\lib\postcss.js:148:43)
at OptimizeCssAssetsPlugin.processCss (I:\projects\Vue\getit\node_modules\optimize-css-assets-webpack-plugin\index.js:63:19)
at Object.processor (I:\projects\Vue\getit\node_modules\optimize-css-assets-webpack-plugin\index.js:29:23)
at I:\projects\Vue\getit\node_modules\last-call-webpack-plugin\index.js:139:8
at arrayEach (I:\projects\Vue\getit\node_modules\lodash\_arrayEach.js:15:9)
at forEach (I:\projects\Vue\getit\node_modules\lodash\forEach.js:38:10)
at LastCallWebpackPlugin.process (I:\projects\Vue\getit\node_modules\last-call-webpack-plugin\index.js:136:3)
(node:8608) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
(node:8608) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
