Aurora Fields Fortress in Cartoon Nightscape

Cartoon-style fortress perched on a gentle hill in a wide open field under a vibrant aurora borealis. Bold, thick black outlines and flat, cheerful colors. The fortress has tall rounded towers with colorful pennant flags, a welcoming gate, and a small moat that catches the aurora's glow. The field around it is dotted with clumps of bright green grass, oversized cartoon flowers, and friendly fireflies. The sky swirls with emerald, teal, purple and pink ribbons of light, casting magical colored highlights on the walls. Slight low-angle 3/4 view to emphasize the fortress against the dreamy aurora-lit landscape.