Create a brand-new vertical Korean summer welcome promotion poster.
Accurately present the text “웰컴 썸머 세일”“여름특가쿠폰 65%”“여름특별혜택 1+1”“2026.08.01-08.15”.
Use coral orange, mint green, cream white, violet, and navy blue.
Employ tropical leaves, bubbles, and two large coupons to form a bright and cheerful layout.
Korean text must be bold, centered, and suitable for mobile reading.
Adopt clean commercial paper art graphics and generous spacing.
Do not include material watermarks, brands, logos, website URLs, QR codes, or random small print.
Output a high-quality static PNG image.
