vue-cli搭建的项目引入.css文件报错

Module build failed: ParseError: E:\Demo\vuedemo\myvuedemo\node_modules\swiper\dist\css\swiper.css:4:96
   1| // style-loader: Adds some css to the DOM by adding a <style> tag
   2|
   3| // load the styles
   4| var content = require("!!../../../css-loader/index.js?{\"minimize\":false,\"sourceMap\":false}!./swiper.css");
-----------------------------------------------------------------------------------------------------^
   5| if(typeof content === 'string') content = [[module.id, content, '']];
   6| if(content.locals) module.exports = content.locals;
   7| // add the styles to the DOM

expected "indent", got "!"

    at Parser.error (E:\Demo\vuedemo\myvuedemo\node_modules\stylus\lib\parser.js:259:11)
    at Parser.expect (E:\Demo\vuedemo\myvuedemo\node_modules\stylus\lib\parser.js:287:12)
    at Parser.block (E:\Demo\vuedemo\myvuedemo\node_modules\stylus\lib\parser.js:845:12)
    at Parser.selector (E:\Demo\vuedemo\myvuedemo\node_modules\stylus\lib\parser.js:1555:24)
    at Parser.ident (E:\Demo\vuedemo\myvuedemo\node_modules\stylus\lib\parser.js:1446:25)
    at Parser.stmt (E:\Demo\vuedemo\myvuedemo\node_modules\stylus\lib\parser.js:778:26)
    at Parser.statement (E:\Demo\vuedemo\myvuedemo\node_modules\stylus\lib\parser.js:685:21)
    at Parser.parse (E:\Demo\vuedemo\myvuedemo\node_modules\stylus\lib\parser.js:236:25)
    at Renderer.render (E:\Demo\vuedemo\myvuedemo\node_modules\stylus\lib\renderer.js:80:22)
    at E:\Demo\vuedemo\myvuedemo\node_modules\stylus-loader\index.js:165:12
    at tryCatchReject (E:\Demo\vuedemo\myvuedemo\node_modules\when\lib\makePromise.js:840:30)
    at runContinuation1 (E:\Demo\vuedemo\myvuedemo\node_modules\when\lib\makePromise.js:799:4)
    at Fulfilled.when (E:\Demo\vuedemo\myvuedemo\node_modules\when\lib\makePromise.js:590:4)
    at Pending.run (E:\Demo\vuedemo\myvuedemo\node_modules\when\lib\makePromise.js:481:13)
    at Scheduler._drain (E:\Demo\vuedemo\myvuedemo\node_modules\when\lib\Scheduler.js:62:19)
    at Scheduler.drain (E:\Demo\vuedemo\myvuedemo\node_modules\when\lib\Scheduler.js:27:9)

 @ ./~/swiper/dist/css/swiper.css 4:14-174 18:2-22:4 19:20-180
 @ ./~/babel-loader/lib!./~/vue-loader/lib/selector.js?type=script&index=0!./~/vue-awesome-swiper/swiper.vue
 @ ./~/vue-awesome-swiper/swiper.vue
 @ ./~/vue-awesome-swiper/index.js
 @ ./src/main.js
 @ multi ./build/dev-client ./src/main.js

我是引入swiper插件的时候报的错，找了好多资料没查到原因。最后有人让看看webpack.base.conf.js文件下的
{
test:/\.css$/,
loader:'style-loader!css-loader!stylus-loader'
//下面没include：属性
}

在下面添上
include: [
/src/,
。。。。
]
可以了
include:是代表我们解析的文件只包含那些东西
include: [] 这里用一个数组来包括的要解析的文件夹路径

{
        test:/\.css$/,
        loader:'style-loader!css-loader!stylus-loader',
        include: [
          /src/,//在src目录下的css需要编译
          '/node_modules/swiper/dist/css'//增加swiper目录
        ]
}

神奇的在下面
{
test:/\.css$/,
loader:'style-loader!css-loader!stylus-loader',
include: []
}

哪怕include: []为空，都行。。。
希望哪位大神看到解释下，问题解决了，但没找到原理。谢谢！！