崩坏：星穹铁道-流萤·第04期手机壁纸

vertical 9:16 mobile phone wallpaper composition, portrait orientation. use an understated natural figure, restrained character silhouette, and clothing that falls smoothly without exaggerated volume. A high-quality illustration featuring Firefly from Honkai: Star Rail (long silver hair with soft teal tips, bright teal eyes, gentle young adult woman). wearing casual everyday outfit, t-shirt and jeans. without her original jacket dress, headband, ribbons, or armored elements for the selected outfit. 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 rolling desert sand dunes at dusk, warm sand, vast open sky, gradient sunset over endless dunes. showing a puzzled slight frown. casually examining the fingernails of one hand. 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.