thinkphp5,定义路由问题

Question

定义这样一个可选参数的路由Route::get('/goods/[:id]','goods/goods/index');
访问servername/goods 视图显示正常
但是访问 servername/goods/id ，css样式全部没有了，console中显示:Resource interpreted as Stylesheet but transferred with MIME type text/html。什么原因啊，求解。