diff --git a/src/components/Navbars/HomeNavbar.js b/src/components/Navbars/HomeNavbar.js
index 2ad588e1..2c01feaf 100644
--- a/src/components/Navbars/HomeNavbar.js
+++ b/src/components/Navbars/HomeNavbar.js
@@ -150,8 +150,10 @@ export default function HomeNavbar() {
             )}
 
             <Box
-                position="sticky"
+                position="fixed"
                 top={showCompletenessAlert ? "60px" : 0}
+                left={0}
+                right={0}
                 zIndex={1000}
                 bg={navbarBg}
                 backdropFilter="blur(10px)"
diff --git a/src/views/AgentChat/index.js b/src/views/AgentChat/index.js
index 6a9e66b3..3356ee52 100644
--- a/src/views/AgentChat/index.js
+++ b/src/views/AgentChat/index.js
@@ -674,7 +674,7 @@ const AgentChat = () => {
   ];
 
   return (
-    <Box minH="100vh" position="relative" overflow="hidden" pt="80px">
+    <Box minH="100vh" position="relative" overflow="hidden" pt="80px" zIndex={0}>
       {/* 背景渐变层 */}
       <Box
         position="absolute"