Adjust the background of the imag

Adjust the background of the image to display an evening sunset scene with a vibrant blend of warm, golden sunlight illuminating the horizon, transitioning upwards into a darkening twilight sky where faint stars are just becoming visible. Ensure the metal park fence remains on a steep slope, and behind it, reveal a sprawling night city view with illuminated buildings and distant lights. The lighting on the elf girl should seamlessly integrate with the warm hues of the sunset, maintaining her original pose of looking at the sky with a slight smile, her right hand lightly supporting her chin, and her elbow resting on the metal park fence, wearing her unzipped black sporty jacket and black sports shorts with a dark blue tint. Preserve the detailed, realistic art style of the overall image.