diff --git a/src/pages/course/type-pie/type-pie.ts b/src/pages/course/type-pie/type-pie.ts
index 6932f05..2fa0025 100644
--- a/src/pages/course/type-pie/type-pie.ts
+++ b/src/pages/course/type-pie/type-pie.ts
@@ -45,7 +45,9 @@ export default class TypePie extends Vue
                     name: t.name,
                     itemStyle:
                     {
-                        color: Constants.THEME.colors[i]
+                        color: Constants.THEME.colors[i],
+                        shadowColor: 'rgba(0,0,0,0.22)',
+                        shadowBlur: 10
                     }
                 }}).sort((a, b) => a.value - b.value)
             }