Inputs: a reference image and my uploaded image.

Step 1: study the reference image: its layout, composition, color palette, lighting, visual hierarchy and typography style.
Step 2: apply that overall design style to my uploaded image, keeping all the content unique to me.

Result: an original thumbnail that is clearly inspired by the reference without copying it.
Keep: professional thumbnail quality, strong contrast, emotional impact, maximum click-through-rate optimization.
Finish: ultra-sharp details and realistic lighting.