Overlapping mountain typography refreshing poster style

Generate a bright and clean activity visual around any theme object: the screen uses a large area of pure white space as an airy background, making geometric symbols derived from the theme the first subjects to be seen, using multiple flat triangles, corners, or peaked surfaces staggered and interspersed with each other to form a sense of layered progression like mountains; the main surfaces occupy the center and edges of the screen, allowing some forms to be cropped by the screen, while other smaller forms hang above or at the bottom to form an echo, maintaining a strong diagonal reading path. The theme text uses large-scale mixed Chinese and English arrangement, Chinese strokes are thick, square, with a small number of rounded corners or cutouts, English uses wide and flat geometric sans-serif glyphs, text can be cropped by the edges or obscured by graphics, so that characters and graphics compete for space with each other without being completely separated. Colors are derived by theme but maintain three types of roles: large areas of high-brightness pure white background, the main body uses medium-saturation, relatively calm natural colors or the theme's main color, text and fine lines use low-brightness warm gold, earth gold or warm support colors within the theme, and a very small amount of cold-colored fine diagonal lines are used as speed and direction cues; overall brightness is high, saturation is restrained, boundaries are clean, no dirty or old grain. Graphics have a vector poster texture, flat surfaces, very fine strokes or same-colored outlines on the outer edges, a small number of wireframe triangles and slender diagonal lines can be added inside, so that white spaces also have slight movement. The information layout maintains a poster-like rhythm: small logos and date-style short messages are placed at the top, small explanatory text is kept in the middle, small black-and-white identification code-style blocks and action phrases can be placed in corners, all small characters are low-profile, tight, and clearly aligned, serving only as rhythmic points. Avoid real depth of field, photographic texture, complex gradients, and over-decoration, focus on retaining the refreshing festive poster temperament of large geometric symbols and giant text pressing, interspersing, and cropping each other in the white space.

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Theme: "Cool Summer" promotion poster, continuing the refreshing national style activity visual of overlapping mountains and large characters
Color palette: Mint green and ice blue as the main colors, apricot orange as a lightweight accent
Layout: The title is arranged vertically to the side, leaving a cool and transparent space in the middle
Information: Present three information points: solar term date, heat-relief selling points, and participation method
Imagery: Lotus breeze, iced drinks, and sunny landscape
Aspect ratio: Vertical 3:4