简约优雅现代手绘风轻奢感水彩金箔质感紫色系生日气球

illustration, minimalist art style, main color purple, color scheme includes gold and light gray, gold and light gray balloons distributed on left and right sides of the image, decorative elements like sparkles and ribbons on balloons, text 'Happy Birthday' in artistic font positioned slightly below center, gradient purple background with soft light spots, overall visual effect is simple and elegant, conveying a joyful and warm birthday celebration atmosphere