卷曲php没有加载网站样式

I used below code to display another website on my site

  $turl = $_GET['turl'];
  $ch = curl_init($turl);
  curl_setopt( $ch, CURLOPT_POST, false );
  curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, true );
  curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 5.0; 
  en-US; rv:1.7.12) Gecko/20050915 Firefox/1.0.7");
  curl_setopt( $ch, CURLOPT_HEADER, false );
  curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
  $data = curl_exec( $ch );

 echo $data;

but when I tried to display facebook or youtube the result looks like-

Because curl only gets html (source code) of specified url and i think styles are addressed relatively on server(not full path). this is why no style has been found . you can also check console in google chrome or firefox by pressing F12 on each browsers and see errors.