3d cartesian axes

A clean 3D Cartesian coordinate system educational model for 3D reconstruction and 3D printing. Three thick cylindrical arrow axes start from one central origin sphere and extend in three mutually perpendicular directions, forming a correct right-handed 3D coordinate system. The X axis extends horizontally to the right and is red. The Y axis extends diagonally backward-left from the origin and is green. The Z axis extends vertically upward and is blue. The X axis and Y axis must clearly form a 90-degree angle in 3D space and must not be collinear, parallel, overlapping, or pointing in opposite directions. The three axes should branch out from the origin like a clear 3D corner frame, not like a straight line. Each axis has a thick round shaft and a clean cone arrowhead. Use simple smooth plastic material, rounded edges, and strong geometric clarity. Add a small sphere at the origin. Add subtle light gray grid planes crossing at the origin, but keep them simple and transparent. Isolat