Swiss International design style, minimalist flat vector poster, vertical 9:16 format, diagonal-split layout. Top-left: Traditional Chinese headline in a serif typeface paired with flowing connected-script serif English. Bottom-right: key symbolic illustration — flat vector artwork with vivid fluorescent gradients, subtle grain texture, scattered pixel-art icons, cultural festival poster aesthetic, museum-quality graphic design. Theme: Infinite Love Marathon Concerts (floral motif). 4K.
