Using a user-uploaded portrait photo as the sole visual reference, the AI strictly preserves the subject's facial features, skin tone, hairstyle, and overall demeanor. It generates a refined birthday-themed portrait: the subject smiles directly at the camera, holding a birthday cake with clearly visible number-shaped candles "20" on top, the candles lit with a warm, soft flame. The subject wears a birthday hat (similar to a crown), and colorful confetti falls from above, creating a lively and dreamy celebratory atmosphere. The background is a dark or burgundy curtain/studio backdrop with slight blurring to emphasize the subject. The overall style is reminiscent of cinematic portrait photography and high-end professional photos, with soft lighting, clear skin tones, sharp details, and a sweet, romantic, and ceremonial feel, suitable for birthday celebrations and social media sharing. High quality, high-definition details, natural and realistic, not exaggerated or cartoonish, no watermarks, and no unnecessary text.