当我运行grunt时，我的css不是'；t更新

Grunt似乎没有跟踪CSS文件

这就是我的GrunFile.js的样子

module.exports=函数（grunt）{
//项目配置。
grunt.initConfig({
pkg:grunt.file.readJSON（'package.json'），
//ec2:'aws.json'，
康卡特：{
卖方：{
src:[
“public/vendor/bootstrap/bootstrap.min.css”，
“public/vendor/fontawesome/css/font-awesome.css”，
“public/vendor/owlcarousel/owl.carousel.css”，
'public/vendor/owlcarousel/owl.theme.css'，
“public/vendor/magnific popup/magnific popup.css”
],
dest:'public/stylesheets/build/vendors.css'
},
主题：{
src:[
“public/stylesheets/theme.css”，
“public/stylesheets/theme elements.css”，
“public/stylesheets/theme blog.css”，
“public/stylesheets/theme animate.css”
],
dest:'public/stylesheets/build/theme.css'
},
扩展：{
src:[
“public/stylesheets/skins/default.css”，
“public/stylesheets/custom.css”
],
dest:'public/stylesheets/build/theme extension.css'
},
homeCss：{
src:[
'public/vendor/rs plugin/css/settings.css'，
“public/vendor/circle flip slideshow/css/component.css”
],
dest:'public/stylesheets/build/homepage.css'
},
卖方：{
src:[
'public/vendor/jquery/dist/jquery.js'，
'public/vendor/jquery.appeage/jquery.appeage.js'，
'public/vendor/jquery.easing/jquery.easing.js'，
'public/vendor/jquery cookie/jquery cookie.js'，
“public/vendor/bootstrap/bootstrap.min.js”，
“public/vendor/common/common.js”，
'public/vendor/jquery.validation/jquery.validation.js'，
'public/vendor/jquery.stellar/jquery.stellar.js'，
'public/vendor/jquery.easy pie chart/jquery.easy pie chart.js'，
'public/vendor/jquery.gmap/jquery.gmap.js'，
“public/vendor/twitterjs/twitter.js”，
'public/vendor/同位素/jquery.同位素.js'，
'public/vendor/owlcarousel/owl.carousel.js'，
'public/vendor/jflickrfeed/jflickrfeed.js'，
'public/vendor/magnific popup/jquery.magnific popup.js'，
'public/vendor/vide/jquery.vide.js'，
“public/javascripts/app/theme.js”
],
dest:'public/javascripts/build/vendors.js'
},
homeJs：{
src:[
'public/vendor/rs plugin/js/jquery.themepunch.tools.min.js'，
'public/vendor/rs plugin/js/jquery.themepunch.revolution.min.js'，
“public/vendor/circle flip slideshow/js/jquery.flipshow.js”，
'public/javascripts/app/views/view.home.js'
],
dest:'public/javascripts/build/home page.js'
},
联系人JS：{
src:[
'https://www.google.com/recaptcha/api.js',
'public/javascripts/app/views/view.contact.js'
],
dest:'public/javascripts/build/contact page.js'
},
主题：{
src:[
'public/javascripts/app/custom.js'，
'public/javascripts/app/preload.js'，
'public/javascripts/app/theme.init.js'，
“public/javascripts/app/google analytics.js”，
],
dest:'public/javascripts/build/theme.js'
},
产品CSS：{
src:[
“public/stylesheets/build/vendors.css”，
“public/stylesheets/build/theme.css”，
“public/stylesheets/build/home page.css”，
“public/stylesheets/build/theme extension.css”
],
dest:'public/dist/stylesheets/production.css'
},
productionJs：{
src:[
'public/javascripts/build/vendors.js'，
'public/javascripts/build/home page.js'，
'public/javascripts/build/contact page.js'，
“public/javascripts/build/theme.js”
],
dest:'public/javascripts/build/production.js'
},
生产现代化：{
src:[
“public/vendor/modernizer/modernizer.js”
],
dest:'public/javascripts/build/modernizer.js'
}
},
丑陋的：{
productionJs：{
src:'public/javascripts/build/production.js'，
dest:'public/dist/javascripts/production.min.js'
},
生产现代化：{
src:'public/javascripts/build/modernizer.js'，
dest:'public/dist/javascripts/modernizer.min.js'
}
},
cssmin：{
目标：{
档案：[{
是的，
cwd:“公共/区域/样式表”，
src:['*.css'，'！*.min.css']，
dest:'public/dist/stylesheets'，
分机：'.min.css'
}]
}
},
imagemin：{
动态：{
档案：[{
是的，
cwd:“公共/图像/”，
src:['***.{png，jpg，gif}
grunt.registerTask('default', ['concat', 'cssmin', 'uglify' ,'watch']);