在一页米白色横线笔记本纸上创建一幅高度详细的工业设计概念草图，主体为雀巢 KitKat 巧克力棒。这页纸应像真实产品设计师的头脑风暴笔…

Create a highly detailed industrial design concept sketch on an off-white lined notebook page featuring a Nestlé KitKat chocolate bar as the main subject. The page should resemble a real product designer's brainstorming notebook with a large three-quarter perspective hand-drawn illustration of a partially unwrapped KitKat bar. The wrapper is bright red with the classic white KitKat logo, while the exposed chocolate fingers reveal realistic crunchy wafer layers, including one broken piece with visible crispy wafer texture and scattered chocolate crumbs. Render the sketch using black ballpoint pen linework, fine cross-hatching, architectural perspective lines, and red marker accents that match the KitKat packaging. Add handwritten annotations, arrows, and design callouts pointing to features such as "Crunchy Wafer Texture," "Classic Red Wrapper," "Chocolate Coating," "Easy Tear Opening," "Signature Logo Placement," "Wafer Cross Section," and "Break Here." Include tiny doodle illustrations of a person enjoying a KitKat with a cup of coffee, playful sketch icons, rough concept thumbnails, engineering notes, and packaging design variations scattered naturally across the page. Place a small reference image of the actual KitKat bar in the lower-left corner with a bold blue arrow pointing toward the main concept sketch, indicating the design study reference. Add subtle coffee stains, pencil guidelines, erased construction marks, folded paper corners, light ink smudges, notebook punch holes, and realistic paper texture to make it feel like an authentic designer's notebook. At the top, write a handwritten title: "Character – Product Study 01", with Nestlé KitKat logos sketched in the corners. Premium industrial design sketchbook aesthetic, realistic pen and marker rendering, product concept art, clean composition, ultra-detailed, high-resolution, professional design presentation, 8K.

在一页米白色横线笔记本纸上创建一幅高度详细的工业设计概念草图，主体为雀巢 KitKat 巧克力棒。这页纸应像真实产品设计师的头脑风暴笔记本，包含一幅大幅的三分之四透视手绘插图，描绘一根部分拆开包装的 KitKat。包装纸为亮红色，配以经典的白色 KitKat 标志，而裸露出的巧克力手指展现出真实酥脆的威化层次，其中一块断裂的巧克力显示出可见的酥脆威化纹理，并散落着巧克力碎屑。 使用黑色圆珠笔线条、精细的交叉影线、建筑透视线条以及与 KitKat 包装相匹配的红色马克笔重点色来绘制草图。添加手写注释、箭头和设计标注，指向以下特征："Crunchy Wafer Texture"（酥脆威化纹理）、"Classic Red Wrapper"（经典红色包装）、"Chocolate Coating"（巧克力涂层）、"Easy Tear Opening"（易撕开口）、"Signature Logo Placement"（标志性标志位置）、"Wafer Cross Section"（威化横截面）以及"Break Here"（此处折断）。 在纸面上自然散落一些微小的涂鸦插图，例如一个人享用 KitKat 并配一杯咖啡的场景、俏皮的草图图标、粗糙的概念缩略图、工程笔记以及包装设计变体。在左下角放置一张实际的 KitKat 巧克力棒小型参考图，用一个醒目的蓝色箭头指向主体概念草图，标示这是设计研究的参考图。 添加细微的咖啡渍、铅笔辅助线、擦除的构图痕迹、折起的纸角、轻微的墨水污渍、笔记本打孔以及逼真的纸张纹理，使其感觉像一本真实的设计师笔记本。在顶部写一个手写标题："Character – Product Study 01"，并在角落绘制雀巢 KitKat 标志的草图。高端工业设计速写本美学，逼真的钢笔和马克笔渲染，产品概念艺术，构图清晰，超精细，高分辨率，专业设计展示，8K。