Create an original transparent graphic with two stacked diagonal price labels, folded white tabs, bold “促销价”, and dark offset bases. Keep the upper label red and the lower label blue, using richer highlights and shadows. Text: “促销价 ¥318” and “促销价 ¥268”. Add speed lines, halftone bursts, and small confetti. No logo, watermark, QR code, website, or note text.