教授白板图：精修诠释

画面构思：Take this paper and transform in the image of a professor whiteboard image: diagrams, arrows, boxes, and captions explaining the core idea visually. Use colors as well [论文内容整体复制到这]。提示：增加表面纹理描述（如「细微颗粒感」「丝绸光泽」）可以拉满细节层级。