diff --git a/demo.html b/demo.html
index 84cba28..88d991f 100644
--- a/demo.html
+++ b/demo.html
@@ -1621,8 +1621,9 @@
       recordHint.style.display = 'none';
       timerDisplay.classList.add('visible');
       
-      // Show transcript overlay
+      // Show transcript overlay and hide nav bar
       transcriptOverlay.classList.add('visible');
+      document.querySelector('.nav-bar').style.display = 'none';
       transcriptContent.innerHTML = '';
       
       // Start timer
@@ -1656,8 +1657,9 @@
       recordHint.style.display = 'block';
       timerDisplay.classList.remove('visible');
       
-      // Hide transcript overlay
+      // Hide transcript overlay and show nav bar
       transcriptOverlay.classList.remove('visible');
+      document.querySelector('.nav-bar').style.display = 'flex';
       
       // Show session summary
       document.getElementById('summaryDuration').textContent = formatTime(sessionDuration).replace(':', '分') + '秒';