以涂鸦素描风格表达【{argument name="subject" default="a powerful AI builder"}】，整体呈现出快速素描、自由变换、即兴手绘、草稿般的质感。线条随意、夸张、粗细不一、略显杂乱，但有节奏、富有表现力，强调概括、夸张、趣味和自发性，而不是严格的写实或精细的细节。色彩采用粗犷、干刷的块状表现，保留不均匀的涂抹、刷痕、飞白、重叠的感觉。颜色会自动适应 [theme/subject] ，但整体表达仍然是涂鸦、素描和概括。没有透明的水彩晕染，没有细腻的水彩过渡，没有纸张纹理，没有柔和的雾化，没有梦幻般的质感。背景以留白为主，保持简单、轻松、未完成、设计感。可以添加少量辅助符号、箭头、标记、圆圈、重复线条、手写文字或其他涂鸦元素，以增强写生或散文式的视觉语言，但不宜过于拥挤或破坏留白的主题和氛围。图片内容无需提前写入； [{argument name="subject" default="a powerful AI builder"}]会自动推导并生成最合适的主图、动作、相关元素、符号或简化场景。整体保持了统一的涂鸦素描风格和夸张的概括表达，避免了复杂的写实背景和过度的刻画。自然地添加一个独特的签名“{argument name="signature" default="BlanPlan"}”作为图像的一部分，谨慎而清晰地放置在左下角、右下角或标题附近。风格应与整体布局统一，如艺术家的签名或设计题字；这 签名字体要精致、内敛、高端，不能太大，不能破坏主体构图，不能显得突兀或廉价。

Express [{argument name="subject" default="a powerful AI builder"}] in a graffiti sketch style, presenting an overall visual effect of rapid sketching, free transformation, improvised hand-drawing, and draft-like qualities. Lines are casual, exaggerated, varied in thickness, slightly messy but rhythmic and expressive, emphasizing generalization, exaggeration, fun, and spontaneity rather than rigorous realism or fine detail. Colors use rough, dry-brush block expressions, retaining uneven smears, brush marks, flying whites, and overlapping feelings. Colors automatically adapt to the [theme/subject], but the overall expression remains graffiti-like, sketch-like, and generalized. No transparent watercolor smudging, no delicate watercolor transitions, no paper textures, no soft atomization, and no dreamlike quality. The background is mainly white space, remaining simple, relaxed, unfinished, and design-oriented. A small amount of auxiliary symbols, arrows, marks, circles, repeated lines, handwritten text, or other graffiti elements can be added to enhance the sketchbook or essay-like visual language, but should not be too crowded or destroy the subject and atmosphere of the white space. The image content does not need to be written in advance; the [{argument name="subject" default="a powerful AI builder"}] will automatically deduce and generate the most suitable main image, actions, related elements, symbols, or simplified scenes. The whole maintains a unified graffiti sketch style and exaggerated generalized expression, avoiding complex realistic backgrounds and over-elaboration. Naturally add a unique signature "{argument name="signature" default="BlanPlan"}" as part of the image, placed discreetly but clearly in the lower-left, lower-right, or near the title. The style should be unified with the overall layout, like an artist's signature or design inscription; the signature font should be refined, restrained, and high-end, not too large, not destructive to the main composition, and not appearing abrupt or cheap.