镜面自拍美学，兼具精细物理效果和身份锁定功能

[Header] (3:4)
Raw high-fidelity photograph, iPhone 17 Pro sensor simulation, diffused indoor ambient lighting, zero bokeh, SHARP focus from the foreground carpet textures to the background closet tracks, f/5.6 aperture for structural depth, subtle digital grain.

[Subject & Identity Locking]
Identity: Absolute preservation of {argument name="reference image" default="Image A"}'s specific facial geometry, focusing on the lip volume, cheekbone structure, and soft-glam aesthetic.
Hair Physics: Voluminous dark chocolate textured waves, layered with frizz-free definition. The hair should cascade naturally over the shoulders and down the back, showing high-definition strand-level detail.
Bio-Fidelity: Detailed skin physics including micro-pores, satin-finish hydration, and visible fine vellus hair along the jawline. Precise anatomical rendering of the hands, including realistic finger-joint articulation and a polished white manicure.
Expression: Mirror-selfie aesthetic; the face is partially obscured by the technical device, capturing a focused gaze directed at the reflection.
[Outfit & Physicality]
Technical Description: High-performance athletic loungewear. An oversized black technical-cotton sweatshirt with a cropped silhouette.
Lower Geometry: Technical micro-performance-wear shorts in matte charcoal grey, featuring a high-cut V-shape waistline and seamless construction.
Textile Physics: High-tensile material-to-skin surface compression. The grey shorts must exhibit realistic physical tension lines across the gluteal proportions and proximal limb geometry. The black sweatshirt shows heavy fabric folding and realistic volume around the torso and arms.
Footwear: Low-cut white cotton crew socks with a soft knit texture.
Physicality: Confident self-assured posture. The body is positioned in a "torsion S-curve," kneeling on the floor with the torso rotated 180 degrees to face the mirror, highlighting the waist-to-hip ratio and symmetrical lower-body silhouette.
[Pose & Composition]
Geometry: Low-angle mirror-reflection framing. The subject is kneeling on a high-pile neutral-toned carpet.
Framing: Vertical orientation capturing the full lower-body geometry and the upper-body rotation.
Reflection Physics: Accurate rendering of the phone-to-hand contact point in the reflection, with the black smartphone held in a technical grip.
[Environment & Lighting]
Atmosphere: Minimalist modern bedroom setting.
Interior Details: Large white sliding closet doors with vertical metallic tracks; a secondary arched mirror is visible in the reflection. Neutral white walls and a light-beige textured carpet.
Lighting: Soft, top-down diffused lighting (3500K). The light source is positioned to emphasize the anatomical bust volume and the muscle definition in the legs without creating harsh shadows.
Background Integrity: All background elements, including the closet doors and wall seams, must remain in sharp focus and perfectly grid-aligned.
[Failure Prevention Rule]