她转身微笑然后离开画面（图像输入参考）

Style: Soft contemporary portrait cinema, naturalistic skin tones, gentle film grain, painterly background blur. [Use image input as first-frame reference: a young woman standing in soft afternoon light, three-quarter angle, environment locked in by the image.] Cinematography: - Camera: locked off medium close-up matching the reference frame; very subtle handheld breathing - Lens: 50mm; shallow DOF preserving the reference's separation between subject and background - Lighting: maintain the reference's soft directional key and ambient fill - Mood: warm, unguarded, momentary Actions: - She turns around - A small, genuine smile reaches her eyes - She holds the look for one beat - She slowly walks out of the frame to camera right; light continues to play on the empty background Background Sound: Quiet room tone; faint cloth rustle as she turns; a single distant door. No music. API note: pass the reference image via input_reference; size must match the target video resolution (jpeg/png/webp).