diff --git a/components/layout/top-bar.tsx b/components/layout/top-bar.tsx
index 7d59e7f..92d6839 100644
--- a/components/layout/top-bar.tsx
+++ b/components/layout/top-bar.tsx
@@ -217,7 +217,7 @@ export function TopBar({ collapsed, isDesktop=true }: { collapsed: boolean, isDe
 
   return (
     <div
-       className="fixed right-0 top-0 h-16 header"
+       className="fixed right-0 top-0 h-16 header z-[20]"
        style={{
          isolation: "isolate",
          left: (pathname === "/" || !isDesktop) ? "0" : (collapsed ? "2.5rem" : "16rem")
diff --git a/components/pages/home-page2.tsx b/components/pages/home-page2.tsx
index 20e7dee..c5e50d4 100644
--- a/components/pages/home-page2.tsx
+++ b/components/pages/home-page2.tsx
@@ -223,7 +223,7 @@ export function HomePage2() {
       return () => window.removeEventListener('home-menu-toggle' as any, handler as any);
     }, []);
     return (
-      <div data-alt="home-navbar" className="fixed h-16 top-0 left-0 right-0 z-50">
+      <div data-alt="home-navbar" className="fixed h-16 top-0 left-0 right-0 z-[19]">
         <div className="mx-auto h-full">
           <div className="flex h-full items-center justify-center px-4 sm:px-6 py-3 bg-black/60 backdrop-blur-md border-b border-white/10">
             {/* 桌面端菜单（居中，仅三个项） */}
diff --git a/components/pages/work-flow/H5MediaViewer.tsx b/components/pages/work-flow/H5MediaViewer.tsx
index c0877e9..8a4940f 100644
--- a/components/pages/work-flow/H5MediaViewer.tsx
+++ b/components/pages/work-flow/H5MediaViewer.tsx
@@ -301,7 +301,7 @@ export function H5MediaViewer({
                         <button
                             type="button"
                             data-alt="open-catalog-button"
-                            className="fixed bottom-4 right-4 z-[60] w-12 h-12 rounded-full bg-gradient-to-br from-blue-500 to-blue-600 text-white shadow-lg flex items-center justify-center active:scale-95"
+                            className="fixed bottom-[6rem] right-4 z-[60] w-12 h-12 rounded-full bg-gradient-to-br from-blue-500 to-blue-600 text-white shadow-lg flex items-center justify-center active:scale-95"
                             aria-label="open-catalog"
                             onClick={() => setIsCatalogOpen(true)}
                         >