11. Color each vertex of a square pyramid with one color, and make the endpoints of the same edge have different colors. If only 5 colors are available, the total number of different coloring methods is $\qquad$ .
If using 3 colors: there are $A_{5}^{3}=60$ coloring methods; using 4 colors: there are $C_{2}^{1} A_{5}^{4}=240$ coloring methods; using 5 colors: there are $A_{5}^{5}=120$ coloring methods. Therefore, the total number of different coloring methods is 420.