公益募款活動海報（水彩手繪風）

prompt

Illustrate a gentle 2:3 portrait poster for a community fundraiser by {org_name}, an NGO. Style: hand-painted watercolor — loose washes of sky blue and warm coral bleeding into white paper, delicate ink-line figures of volunteers and {cause_theme} motifs scattered along the edges, with visible paper grain and pigment blooms. Keep the center airy for a hand-lettered brush headline naming the event, with {event_date} written underneath like a postcard note. Near the bottom, paint a simple progress-bar motif hinting at the {donation_goal} target, plus a small heart stamp. The mood is hopeful and human, never corporate; avoid harsh outlines or saturated neon. Output high-resolution portrait for both print and social.