// improt module
import { ElModule } from 'element-angular'
// import styles
// if you use webpack, in app.module.ts:
import 'element-angular/theme/index.css'
// or anglar-cli, in /angular-cli.json:
{
  "app": [{
    "styles": [
      "../node_modules/element-angular/theme/index.css"
    ],
    // other configurations...
  }]
}
// or other, in /src/styles.css:
@import "~element-angular/theme/index.css"