Ceremonial Celebration Visual Poster

Create a thematic visual with a sense of celebration centered around {argument name="theme" default="any subject"}: the subject occupies the lower-middle part of the frame with a close-up main form, maintaining a quiet and stable frontal posture, with edges allowed to be slightly swallowed by shadows for a composed presence. The background is a restrained pure space, with {argument name="base color" default="low-brightness primary base color"} and clear lighting layers derived from the theme's mood; one side is pressed with a large soft-edged oval shadow, while the other retains a brighter breathing area. Colors are extracted from the material, season, and identity of the subject, maintaining a large area of clean structural base colors and clear highlight information colors. At the bottom, use a line of huge {argument name="glowing title" default="luminous handwriting"} as an emotional heading with long, coherent strokes and a neon-like soft white halo. The surface features slight film grain and soft focus vignetting, resulting in a private and formal commemorative image built on light, shadow, and restrained color scales.