Elegant Backless Gown Portrait

A subject stands on a classic stone terrace, framed from head to thighs. She faces away from the camera at a three-quarter back angle, slightly turned to the left; her arms extend naturally forward, hands resting lightly on a rough beige-grey stone railing. She looks back naturally over her left shoulder at the camera, head slightly lowered, gaze calm and direct, expression restrained, confident, slightly aloof, lips naturally closed. She has a delicate soft oval face, almond-shaped dark brown eyes, natural thin eyebrows, a slender bridge of the nose, and soft nude-pink lips. Light makeup, focused on detailed eyeliner, natural lashes, and a slight warm blush. The skin is warm beige, retaining real pores, fine vellus hair, natural skin tone variations, and slight highlights; no plastic skin smoothing. Deep black hair is loosely gathered into a slightly messy low bun, with natural volume at the crown and fine strands blown by the breeze near the ears and neck. Wearing small gold dangle earrings. She wears an outfit_style, stand-up collar, sharp shoulder tailoring, made of fine matte silk satin or premium crepe. The gown features a large, flowing, waist-deep oval backless opening, edges clean and snug, fully showcasing the shoulder blades and back lines; naturally cinched at the waist, the skirt hangs vertically and smoothly, no patterns, no extra decorations. The background consists of layered green forests and hills in the distance, softly blurred due to a telephoto lens and atmospheric perspective. The sky is bright but with no visible sun, using natural diffused light from thin clouds or an overcast sky. The skin tone, white gown, and stone railing have soft and delicate light-to-dark transitions, overall low saturation, low contrast, dominated by ivory white, warm skin tones, taupe stone, and soft forest green. Photography style: lens, f/2, eye-level position slightly above the waist, shallow depth of field, clear eyes, real optical bokeh, luxury high-fashion editorial, slight film grain, photorealistic. Avoid: frontal poses, incorrect backless shape, shoulders too narrow, distorted spine, incorrect fingers, plastic skin, heavy makeup, strong sunlight, excessive HDR, CG, illustration, text, watermarks, logos.