cssFiles not load in pipeline.js

[xieyimian]

thanks for the sailng
but my css files are not compile to .tmp/public/styles like i expect

here is my pipeline css part

var cssFilesToInject = [
  'styles/my.css',
  'styles/**/*.css'
];

but the my .tmp/public/styles/ are still nothing except importer.css , how to fix it ?