Isometric 3D Miniature City Diorama with Holiday Theme

Present a clear, 45° top-down isometric 3D miniature cartoon scene, depicting the classic architecture or landmarks of [{argument name="city" default="Shanghai"}] and placing it at the center of the composition. Use decorations, twinkling lights, and appropriate seasonal details (defaulting to Winter) corresponding to the [{argument name="holiday" default="New Year's Day"}] to depict the city as a [{argument name="holiday" default="New Year's Day"}] theme filled with festive atmosphere. Use soft and delicate textures, realistic PBR materials, and soft, realistic lighting, creating subtle shadow effects. Create a small, neat diorama-style city base with clean edges. Use a clean [{argument name="holiday" default="New Year's Day"}] background color that contrasts sharply with the scene. In the top center, display the text [{argument name="city" default="Shanghai"}] in bold, large font. Immediately below it, display “[{argument name="holiday" default="New Year's Day"}] Special Edition” in medium font. (Optional) Place a small square flag icon below the text. All text must automatically match the background contrast (white or black). Composition: Perfectly centered, 1080×1080 square, ultra-minimalist holiday diorama aesthetic