Create an original vertical stack of red, cream, black, and gold retail coupons. Text: “满399减60”, “满699减120”, “满199减30”, “满75减10”, “满300减50”. Use richer red gradients, a soft symmetrical gold glow, and at most six tiny confetti accents; no ribbons or large burst effects. No logo, watermark, QR code, website, or note text.