Elegant woman in black gown by grand marble staircase

A breathtaking, ultra-luxury fashion portrait of a single glamorous young woman in an opulent white-and-gold mansion, 9:16 vertical composition. She has long flowing black hair, captivating eyes, glossy lips, a confident gaze, and an elegant, mysterious expression. She wears a designer black silk evening gown with a dramatic high slit, luxurious diamond jewelry, long satin gloves, and high heels. She stands gracefully beside a grand marble staircase surrounded by crystal chandeliers, white roses, candles, champagne, soft golden lighting, floating rose petals, and subtle mist. Rich cinematic atmosphere, high-fashion editorial photography, ultra-realistic skin texture, premium luxury aesthetic, dramatic shadows, volumetric light rays, shallow depth of field, 8K HDR, hyper-detailed, sophisticated, alluring, mysterious, timeless elegance, magazine-cover quality, centered composition, no man, no text, no logo, no watermark, masterpiece, perfect for Instagram Reels cover and mobile wallpaper, 9:16.