Main subject: Dynamic outline of a swallow formed by flowing curves. Scene: Off-white gradient background. Style: Light green minimalist line art, high-definition vector texture, negative space design. Color palette: Light green lines, warm tone gradient background. Lighting: No additional lighting, relying on line hatching and negative space to create layered rhythm. Composition: Horizontal dense hatching forms a displacement effect, negative space design enhances the picture's sense of rhythm. Purpose: Minimalist line art creation, vector decorative pattern design.