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[Subject] Single stylized young woman, early-20s appearance, feminine presentation, front-facing upper-body to upper-thigh portrait, relaxed standing pose with slight hip tilt, calm soft expression, pale peach skin tone, bright aqua-blue eyes, long straight jet-black hair falling past the chest and shoulders, blunt straight bangs across the forehead, slim figure, no visible freckles, no glasses, subtle eyeliner, nude-pink lips.

[Clothing & materials] Black two-piece swimwear / fashion bikini set with muted olive-beige botanical palm-leaf print, structured bralette-style top with thin spaghetti straps and stitched cups, high-waisted matching bottoms with side cutouts at the hips, smooth matte swim fabric, minimal wrinkles, clean fitted silhouette. Black choker collar with silver ring centerpiece and small dangling beads or charms. No logos.

[Environment] Plain white seamless studio background, no props, no furniture, no scenery, no visible horizon or room edges, very clean negative space.

[Composition/Camera] Vertical portrait, centered full torso crop from head to upper thighs, eye-level camera, straightforward fashion pose, subject occupying most of the frame, one arm relaxed downward partially visible, the other cropped, symmetrical styling with slight body curve, editorial studio composition.

[Lighting] Soft even front lighting, bright high-key setup, very low shadow density, clean skin highlights, neutral-to-cool white balance, no dramatic directional shadows, no rim light, no ambient environmental tint.

[Color palette] Minimal palette: white background, black hair, black swimwear, muted olive-beige print accents, pale skin, bright cyan-blue eyes as accent color. Crisp, clean, low-noise look.

[Style/Rendering] Polished anime fashion illustration, ultra-clean linework, soft blended cel shading, glossy but restrained beauty finish, crisp edges, minimal background styling, not photoreal, not painterly, not 3D. Modern editorial character art.

[Detail constraints] Keep one subject only, plain white background only, long straight black hair with blunt bangs, vivid aqua eyes, printed black two-piece set, and black ring choker. Do not add beach scenery, props, jewelry stacks, tattoos, extra garments, or additional figures. Preserve the clean studio feel and minimal fashion focus.

Negative prompt: beach background, pool, palm trees, sunglasses, hat, extra people, heavy makeup, neon colors, messy hair, curly hair, smile with teeth, dramatic pose, photoreal skin pores, watermark, text, extra jewelry, cardigan, jacket, shoes.

Suggested parameters: aspect ratio 4:5, lens 65-85mm portrait feel, shallow but clean depth of field, 28-36 steps, CFG 6-7.5, sampler DPM++ 2M Karras, style strength medium, seed 634208115.

Delta prompt strategy:
1. If the background changes: append "plain white seamless studio background, no props, no scenery".
2. If the hair changes shape: append "long straight jet-black hair with blunt-cut bangs".
3. If the eye color shifts: append "bright aqua-blue eyes as the main accent".
4. If the print disappears: append "subtle olive-beige palm-leaf print on the black two-piece set".
5. If the choker is missing: append "black choker with silver ring centerpiece and small dangling charms".
6. If the pose becomes dynamic: append "simple relaxed standing fashion pose, centered composition".
7. If shadows become strong: append "soft high-key front lighting, very low shadow contrast".
8. If extra beach elements appear: append "studio portrait only, no beach, no pool, no outdoor scene".
9. If the style turns photoreal: append "clean anime editorial illustration, smooth cel shading".
10. If the crop changes too much: append "head-to-upper-thigh vertical portrait, subject filling most of frame".