在线课程预售方形

Square 1:1 online course marketing card. Background is a clean warm cream color. The right two-thirds shows a friendly half-body portrait of a smiling young East Asian woman in her early thirties wearing a cream knit sweater, soft natural side window light. The left third shows a stacked bold black sans-serif headline reading "Ship your first AI app in 30 days", and below it in smaller text "Early-bird pre-sale, 40% off". A small dark CTA button at the lower-left reads "Save my seat". No real brand name, no logo, no watermark. Premium course launch ad design, photorealistic portrait.