laravel does not load styles while passing value with urls

im using a laravel 5.4 and i have a problem with urls, when i send value with urls like http://localhost:8000/Music/{id} , laravel does not load styles but if use url without value to get that view it loads styles properly, it also does not load styles if an slash get added to end of url like http://localhost:8000/videos/ but without that slash http://localhost:8000/videos works without problem ..sorry i cant speak english good.

here is my code :

Route::get('Music/{id}','homeController@Music');

public function Music(music $item)
{
    return view('music',['item'=>$item]);
}

this works by route model binding properly and does what i want but when it returns music blade file it does not load styles that i linked but if use this instead :

Route::get('Music','homeController@Music');

a

public function Music()
{
    $item = music::find(1); //for example
    return view('music',['item'=>$item]);
}

that works perfect. i checked this many ways its because of {vlaues} in urls it also does not loads styles or js files if an slash get added to end of urls

what is the problem?