"Design a luxury, photorealistic packaging for a 2-piece set of cotton candy-themed panties. Use soft gradient colors (pastel pink, blue, and white) with a plush, 3D-rendered cotton candy texture. Include studio lighting and light reflection effects to create a surreal, dreamy aesthetic. The packaging should feature realistic fabric textures, 3D立体剪裁 (3D立体剪裁) details, and a minimalist, elegant design with the brand name 'Gujin' prominently displayed. Add a hanging hole for store display and ensure the design is cost-effective for mass production while maintaining a premium, high-quality feel."