复古风饮料商业海报

Generate a bright and cheerful retro commercial visual around the theme of {argument name="beverage" default="lychee iced tea"}. The visual focus is established by an oversized, thick, rounded typography for the main title "{argument name="main_title" default="Lychee Opening"}", resembling soft, inflated signage. The main beverage appears in the lower center with a realistic product photography texture, featuring sharp highlights, condensation, and natural shadows, overlapping the background and text to create depth. The background uses sharp radiating blocks for a sense of speed and joy. The text system has three layers: the large main logo, a narrow retro uppercase subtitle "{argument name="subtitle" default="LYCHEE ICED TEA"}", and small corner details. Colors are vibrant and clean, extracted from the beverage's flavor and brand mood. The overall tone is fresh, playful, and energetic, avoiding dark or muddy vintage filters.