STEM Classroom Teaching-Aid Illustrations Generator

Design a labeled STEM classroom teaching-aid illustration, 1:1 square aspect ratio, output size 1600x1600. FIXED LAYOUT (must match across every variant of this template): a top title band (~12% of frame) with the equipment/topic name; a large center illustration (~55% of frame) of exactly one piece of classroom or lab equipment, in flat/vector style, fully visible with nothing cropped at the edges; thin callout lines radiating from 3-4 key parts of the equipment out to short label text placed in the surrounding margin; a bottom caption strip (~12%) with a short one-line classroom-use caption. VARIABLE CONTENT for this specific example: equipment = {equipment_type}, title text = "{topic_title}", part labels = {part_labels}, bottom caption text = "{caption_text}", color palette = {color_palette}. Render the title, part labels, and caption as real, legible, correctly spelled text exactly as given. Do not add a watermark. Do not crop the equipment illustration at the frame edges.