長黑髮年輕女子咖啡館肖像，著印花T恤，背景虛化

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Create a realistic candid portrait photograph of a young East Asian woman seated indoors in a cozy cafe or lounge, framed from chest up in a vertical 3:4 composition. She has long straight black hair with soft natural shine, slightly tousled strands, and hair falling over both shoulders. Her face is intentionally covered by a large centered opaque square privacy mask in a muted brown-to-taupe gradient, obscuring all facial features. She wears a loose white crewneck T-shirt with a colorful floral graphic on the chest. The background is softly blurred with warm ambient lighting, golden yellow wall tones on the left, neutral shelves in the upper right, and a brown leather or vinyl sofa behind her. Use shallow depth of field, natural indoor light, realistic skin and hair texture, DSLR portrait look, soft bokeh, casual intimate mood. Add a semi-transparent white watermark reading Alconia in the bottom-left corner.