single continuous thin line drawing, minimal outline sketch of Philadelphia skyline, delicate and elegant, with a simple eagle subtly incorporated into the design, white background, black ink lines only, no shading, no color, ultra minimalist, interpretive, fine line tattoo style单一连续的细线描绘，费城天际线的极简轮廓草图，优雅纤细，设计中巧妙融入了一只简单的鹰，白色背景，仅有黑色墨线，无阴影，无颜色，超极简，具解释性的，精细线条纹身风格。chatgpt官网中文版4.0
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