牙醫診所再行銷廣告（療癒極簡粉彩風）

prompt

Create a 1:1 retargeting ad visual for a dental clinic that feels calm instead of clinical. Airy minimal composition on a {pastel_tone} gradient background: a single 3D-rendered glossy tooth character with a gentle smile, standing beside a small potted plant and a soft cotton cloud, soft studio light, pastel shadows, rounded friendly shapes. Bottom-right corner shows a subtle abstract sparkle to suggest freshness — no medical instruments, no clinical claims imagery. Keep generous negative space across the top 30% as the safe margin for reassurance copy like '{reassurance_message}' and the clinic name {clinic_name}. Square format, soft matte render, premium wellness-brand tone, no text in the image.