Transform the uploaded portrait into a high-quality cartoon illustration while preserving the person's exact facial features and identity. Keep the eyes, nose, mouth, eyebrows, hairstyle, skin tone, and facial expression recognizable and accurate. Use a clean modern cartoon style with smooth lines, vibrant colors, professional shading, and high detail. Do not alter age, gender, or facial structure. The final result should look like a cartoon version of the same real person, with a simple elegant background, balanced lighting, and ultra-high quality.