grizzlyPromptA candid 3:4 portrait of a young woman on a sunlit beach, captured in a warm American retro film aesthetic reminiscent of Kodak Portra 400. She wears a white T-shirt and simple layered necklaces, her long hair loose and gently blown by the breeze, laughing with a broad, radiant smile (灿烂大笑). Natural healthy skin tones, warm color temperature with slight golden tint, moderately elevated saturation for summer vibrancy, fine organic film grain (subtle, not heavy), moderate contrast with bright highlights and soft, natural shadows. Include a soft top-left lens flare and shallow depth of field (35mm-equivalent feeling, soft background blur) so waves and horizon form a gentle backdrop. Composition crops to 3:4 portrait focusing on upper body and face, candid, lively, and youthful. Keep textures realistic, avoid over-smoothing, heavy vignetting, harsh filters, or unnatural color shifts. Suitable for social media and print.