text: module.exports = {
  	plugins: [
  		require('postcss-import')({}),
  		require('postcss-flexbugs-fixes')({}),
  		require('precss')({}),
  		require('cssnano')({
  			preset: 'default',
  		}),
  		require('autoprefixer')({
  			// 不删除老式写法
  			remove: false,
  			// 样式前缀添加
  			browsers: [
  				"> 1%", 
  				"IE > 8",
  				"last 2 versions", 
  				"Firefox ESR", 
  				"Opera 12.1",
  				"Safari > 7"
  			]
  		})
  	]
  }
  