崩坏：星穹铁道-流萤·第07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 overall proportions and a relaxed everyday presentation. wearing a classic sailor-collar school uniform with a pleated skirt, opaque fabric, complete upper-body coverage and a comfortable modest fit, 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 comfortably fitted opaque clothing with complete coverage, neat tailoring and natural fabric folds. use a fresh independently composed framing; place the subject slightly right of center with comfortable breathing space on the left, while preserving the selected shot and complete framing. showing a mischievous playful smile. one hand resting lightly at the back of the neck. 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.