瑞士風格極簡海報，以鮮豔花卉圖案和漸層色呈現無限愛馬拉松音樂會

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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.