{
"style_id": "photo-flat-doodle-campaign-poster",
"style_name": "Photo × Flat-Doodle Campaign Poster",
"version": "1.0",
"aspect_ratio": "2:3",
"reference": "Shanghai edition — derived from TfL 'Your London Adventure Starts Here'",
"variables": {
"scene": {
"city": "上海 Shanghai",
"landmark_photo": {
"subject": "Oriental Pearl Tower with Lujiazui skyline in the background, viewed…
