招贴设计的渐变海报

Quick answer：

The subject refers to a poster design with gradient effects. Gradient posters are a form of visual design that utilize a gradual blend of colors or shades to create a visually appealing and dynamic composition. They are commonly used in advertising, art, and graphic design to draw attention and convey a sense of movement or depth. The technique involves selecting a range of colors or shades and then applying them in a smooth transition across the poster, often following a specific pattern or design theme.