diff --git a/AIStudyApp/AIStudyApp/Assets.xcassets/Icons/icon-plus.imageset/Contents.json b/AIStudyApp/AIStudyApp/Assets.xcassets/Icons/icon-plus.imageset/Contents.json
new file mode 100644
index 0000000..a9ad7a7
--- /dev/null
+++ b/AIStudyApp/AIStudyApp/Assets.xcassets/Icons/icon-plus.imageset/Contents.json
@@ -0,0 +1 @@
+{"images":[{"filename":"icon-plus.svg","idiom":"universal"}],"info":{"author":"xcode","version":1},"properties":{"template-rendering-intent":"template","preserves-vector-representation":true}}
diff --git a/AIStudyApp/AIStudyApp/Assets.xcassets/Icons/icon-plus.imageset/icon-plus.svg b/AIStudyApp/AIStudyApp/Assets.xcassets/Icons/icon-plus.imageset/icon-plus.svg
new file mode 100644
index 0000000..a7096a7
--- /dev/null
+++ b/AIStudyApp/AIStudyApp/Assets.xcassets/Icons/icon-plus.imageset/icon-plus.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="24" height="24" viewBox="0 0 24 24" fill="none"><path d="M12 5.25C12.4142 5.25 12.75 5.58579 12.75 6L12.75 18C12.75 18.4142 12.4142 18.75 12 18.75C11.5858 18.75 11.25 18.4142 11.25 18L11.25 6C11.25 5.58579 11.5858 5.25 12 5.25Z" fill-rule="evenodd" fill="#AEAEAE"></path><path d="M5.25 12C5.25 11.5858 5.58579 11.25 6 11.25L18 11.25C18.4142 11.25 18.75 11.5858 18.75 12C18.75 12.4142 18.4142 12.75 18 12.75L6 12.75C5.58579 12.75 5.25 12.4142 5.25 12Z" fill-rule="evenodd" fill="#000000"></path></svg>
diff --git a/AIStudyApp/AIStudyApp/Features/Library/LibraryHomeView.swift b/AIStudyApp/AIStudyApp/Features/Library/LibraryHomeView.swift
index cd98a0b..ae5fc9c 100644
--- a/AIStudyApp/AIStudyApp/Features/Library/LibraryHomeView.swift
+++ b/AIStudyApp/AIStudyApp/Features/Library/LibraryHomeView.swift
@@ -18,7 +18,7 @@ struct LibraryHomeView: View {
                             .overlay(RoundedRectangle(cornerRadius: 10).stroke(Color.zxBorder008, lineWidth: 1))
                     }.accessibilityLabel("搜索知识库")
                     NavigationLink(value: Route.libraryCreate) {
-                        Image(systemName: "plus").font(.system(size: 18)).foregroundColor(.white)
+                        Image("icon-plus").resizable().scaledToFit().frame(width: 14, height: 14).foregroundColor(.white)
                             .frame(width: 36, height: 36).background(ZXGradient.brand).clipShape(RoundedRectangle(cornerRadius: 10))
                     }.accessibilityLabel("创建新知识库")
                 }.padding(.horizontal, 20).padding(.top, 8).padding(.bottom, 12)
diff --git a/AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift b/AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift
index eca540c..20bdcd5 100644
--- a/AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift
+++ b/AIStudyApp/AIStudyApp/Features/Library/LibrarySubpages.swift
@@ -272,7 +272,7 @@ struct LibraryDetailPage: View {
                 }
                 ToolbarItem(placement: .topBarTrailing) {
                     NavigationLink(value: Route.addKnowledge(knowledgeBaseId: knowledgeBaseId)) {
-                        Image(systemName: "plus").font(.system(size: 16, weight: .semibold)).foregroundColor(Color.zxPrimary)
+                        Image("icon-plus").resizable().scaledToFit().frame(width: 14, height: 14).foregroundColor(Color.zxPrimary)
                     }
                 }
                 ToolbarItem(placement: .topBarTrailing) {
diff --git a/AIStudyApp/AIStudyApp/Features/Quiz/QuizViews.swift b/AIStudyApp/AIStudyApp/Features/Quiz/QuizViews.swift
index f1b066e..d7a463c 100644
--- a/AIStudyApp/AIStudyApp/Features/Quiz/QuizViews.swift
+++ b/AIStudyApp/AIStudyApp/Features/Quiz/QuizViews.swift
@@ -33,7 +33,7 @@ struct QuizListView: View {
                             Button {
                                 Task { await generateQuiz() }
                             } label: {
-                                HStack { Image(systemName: "plus"); Text("生成新测验") }.font(.system(size: 14, weight: .medium)).foregroundColor(Color.zxPrimary).frame(maxWidth: .infinity).frame(height: 44).background(Color.zxPrimarySoft).clipShape(RoundedRectangle(cornerRadius: 12))
+                                HStack { Image("icon-plus").resizable().scaledToFit().frame(width: 14, height: 14); Text("生成新测验") }.font(.system(size: 14, weight: .medium)).foregroundColor(Color.zxPrimary).frame(maxWidth: .infinity).frame(height: 44).background(Color.zxPrimarySoft).clipShape(RoundedRectangle(cornerRadius: 12))
                             }.disabled(isGenerating)
                             ForEach(quizzes) { q in
                                 NavigationLink(value: Route.quizTake(quizId: q.id)) {