简约风蓝色绿色橙色白色书本毕业帽地球仪A+试卷圆形

minimalist icon design, main colors blue, green, orange, and dark blue, bright and contrasting color scheme, four circular icons evenly distributed in the four corners, symmetrical spatial relationship, educational elements: stacked books, stamped document, A+ marked exam paper, graduation cap, white background, clear and intuitive visual effect, conveys educational information related to learning, achievement, assessment, and graduation