diff --git a/AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift b/AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift
index 6fb7643..33a192c 100644
--- a/AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift
+++ b/AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift
@@ -220,7 +220,7 @@ struct AddKnowledgePage: View {
                         Text("保存").font(.system(size: 14, weight: .bold))
                     }
                     .foregroundColor(.white).frame(maxWidth: .infinity).frame(height: 52)
-                    .background(canSave ? ZXGradient.ctaPurple : Color.zxHairlineStrong)
+                    .background(canSave ? AnyView(ZXGradient.ctaPurple) : AnyView(Color.zxHairlineStrong))
                     .clipShape(RoundedRectangle(cornerRadius: 16))
                 }
                 .disabled(!canSave || isSaving)