崩坏：星穹铁道-流萤·第09期手机壁纸

vertical 9:16 mobile phone wallpaper composition, portrait orientation. A high-quality illustration featuring Firefly from Honkai: Star Rail (long silver hair with soft teal tips, bright teal eyes, gentle young adult woman). Use natural balanced adult proportions with an understated overall silhouette, without exaggerated curves. wearing a sleek halter-neck backless jumpsuit with a defined waist and elegant full-length tailored trousers, fully replacing the original costume while retaining only identity-defining physical traits; do not retain original clothing, weapons, headwear, masks, armor, capes, wings, costume accessories, decorative props, companions, or signature ornaments. Use neat tailoring with comfortable garment ease, clean seams and natural folds, without rigid sculpting. medium shot, eye-level, waist-up, balanced composition. 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. showing a soft warm expression. a small friendly wave at the viewer. cleanly detailed, smooth rendering with soft gradients and clean flat color areas, minimal grain or noise, clearly adult character, fashion-forward styling faithful to the specified outfit design.