Express [Subject/Theme] in a graffiti sketch style, presenting an overall visual effect of quick outlining, free deformation, impromptu hand-drawing, and draft-like appearance. The lines are casual, exaggerated, and can vary in thickness, slightly messy but rhythmic and expressive, emphasizing generalization, exaggeration, playfulness, and spontaneity, rather than rigorous realism or detailed rendering. Colors are expressed in rough blocks with a distinct dry-brush feel, retaining uneven smearing traces, brush strokes, dry-brush effects, and a sense of coverage. Colors automatically adapt to [Subject/Theme], but the overall expression remains graffiti-style, sketch-style, and generalized. Do not use transparent watercolor blooming effects, do not use delicate watercolor transitions, do not use paper textures, do not use soft atomization, and do not use dreamy textures. The background is mainly left blank, maintaining a sense of simplicity, relaxation, incompleteness, and design. A small number of auxiliary symbols, arrows, marks, circled areas, repeated lines, casually written text, or other graffiti elements can be added to enhance the visual language of a sketchbook or jotting style, but it must not be too crowded, and must not destroy the subject and the blank space temperament. The image content does not need to be written out in advance; the most suitable subject image, actions, related elements, symbols, or simplified scenes are automatically deduced and generated by [Subject/Theme], keeping the overall unified graffiti sketch style and exaggerated generalized expression, avoiding complex realistic backgrounds and over-elaboration. The exclusive signature "voxcat" needs to be naturally added to the image as a part of the picture. The position should be low-key but clear, and can be placed in the bottom left corner, bottom right corner, or near the title. The style must be consistent with the overall layout, like an artwork signature or a design sign-off; the signature font should be exquisite, restrained, and high-end, must not be too large, must not destroy the subject composition, and must not appear abrupt or cheap.
以涂鸦速写风表现【主题/主体】，整体呈现快速勾勒、自由变形、即兴手绘与草稿式的视觉效果。线条随手、夸张、可粗细不一，略显凌乱但具有节奏和表现力，强调概括、夸张、趣味和随性，而不是严谨写实或精细刻画。
颜色采用粗糙、干刷感明显的块面表现，可保留不均匀的涂抹痕迹、刷痕、飞白与覆盖感，色彩根据【主题/主体】自动适配，但整体保持涂鸦式、速写式、概括式的表达。不要透明水彩晕染效果，不要细腻水彩过渡，不要纸纹理，不要柔和雾化，不要梦幻质感。
背景以留白为主，保持简洁、轻松、未完成感和设计感，可加入少量辅助性符号、箭头、记号、圈画、重复线、随手写的文字或其他涂鸦元素，以增强速写本或随笔式视觉语言，但不可过于拥挤，不可破坏主体和留白气质。
画面内容不需要预先写清楚，由【主题/主体】自动推演并生成最适合的主体形象、动作、相关元素、符号或简化场景，整体保持统一的涂鸦速写风和夸张概括的表现方式，避免复杂写实背景和过度铺陈。
画面中需自然加入专属签名“voxcat”，作为画面的一部分，位置低调但清晰，可放在左下角、右下角或标题附近，风格需与整体版式统一，像作品署名或设计落款；签名字体精致、克制、高级，不可过大，不可破坏主体构图，不可显得突兀或廉价。
