Any way to add CSS for common path?
You might want to do something like this in your template.php file.

function MYTHEME_preprocess_node($vars) {
  switch (arg(0)) {
    case 'red-car':
      drupal_add_css(drupal_get_path('theme', 'MYTHEME') . "/css/red-car.css");
      break;
    case 'blue-house':
      drupal_add_css(drupal_get_path('theme', 'MYTHEME') . "/css/blue-house.css");
      break;
  }
}