崩坏：星穹铁道-黑天鹅·第04期手机壁纸

vertical 9:16 mobile phone wallpaper composition, portrait orientation. A high-quality illustration featuring Black Swan from Honkai: Star Rail (very long lavender hair, violet eyes, mature elegant woman). wearing a playful adult cat-inspired fashion outfit with a fitted silhouette, cat-ear headband, and subtle feline accessories, fully replacing the original costume, with no original clothing elements retained. without her original fortune-teller dress, veil, or signature garment accessories for the selected outfit. extreme close-up, eye-level, face and eyes detail, tight close-up framing. use a fresh independently composed framing; place the subject slightly left of center with comfortable breathing space on the right, while preserving the selected shot and complete framing. set in a cozy sunlit room, warm interior, soft furnishings, window with daylight, plants, books. showing a relaxed content expression. holding out one little finger in a playful promise gesture. cleanly detailed, smooth rendering with soft gradients and clean flat color areas, minimal grain or noise, clearly adult character, natural anatomically balanced adult proportions, fashion-forward styling faithful to the specified outfit design.