Bannière Illustrée à la Main pour Réseaux Sociaux

A hand-drawn editorial illustration for a social media banner cover. Subject: [a stylized cartoon character with an exaggerated shocked expression pointing toward a glowing lightbulb]. Composition: The main character is positioned on the center-left, with ample clean negative space reserved on the right side for typography. Text: Bold stylized hand-drawn Chinese text on the right reading '[突破瓶颈]' with a smaller subtitle '[3个核心方法]'. Color Palette: High-contrast vibrant colors with a scheme of [vivid orange, warm yellow, and deep navy blue]. Style: Clean textured hand-drawn digital illustration, 2D vector-like flat shading, bold outlines, expressive dynamic visuals with high readability in small previews. No realistic elements, uncluttered and cohesive layout.