Dramatic Chiaroscuro Portrait

Create a realistic-style, vertical-format studio portrait of an East Asian woman in her 20s, centered against a completely black background, presenting a dramatic theme of light and shadow. She has dark brown short bob hair with thin bangs, natural makeup, and soft, radiant skin texture. Her expression is calm, with a slight, mysterious smile as she looks directly at the camera. Her pose involves gently raising one hand to her lips, with her fingers slightly curled, creating an intimate and elegant atmosphere. She is wearing a sleeveless white satin cheongsam-style top with delicate jacquard patterns, a high collar, knot buttons, and a water droplet neckline. Use a single narrow beam of light from the upper left/front to illuminate her face, hair highlights, hands, shoulders, and shimmering fabric, while the rest of her body and the background are hidden in deep black shadows. Emphasize high-contrast chiaroscuro lighting, realistic skin texture, eye sparkle, glossy fabric reflections, shallow depth of field, cinematic low-key photography, 85mm portrait lens effect, 2:3 vertical composition, no text, no watermark. Customizable with the following parameters: {argument name="subject age and ethnicity" default="a young East Asian woman"}, {argument name="hair style" default="short chestnut-brown bob hair with wispy bangs"}, {argument name="outfit" default="a sleeveless white satin cheongsam-inspired top with a high Mandarin collar, floral jacquard texture, frog-button closures, and a keyhole neckline"}, {argument name="lighting theme" default="Dramatic narrow spotlight in deep black shadows"}, and {argument name="facial expression" default="Calm and mysterious slight smile"}.