diff --git a/app/src/main/java/top/yeij/hearth/MainActivity.kt b/app/src/main/java/top/yeij/hearth/MainActivity.kt
index 55c7c27..ca46ef2 100644
--- a/app/src/main/java/top/yeij/hearth/MainActivity.kt
+++ b/app/src/main/java/top/yeij/hearth/MainActivity.kt
@@ -51,11 +51,11 @@ class MainActivity : Activity() {
         // Placeholder manifest/catalog URLs; replace with the real server on device
         private const val MANIFEST_URL = "https://example.com/hearth/manifest.json"
         private const val CATALOG_URL = "https://example.com/hearth/catalog.json"
-        // 内容 WebView 顶部预留高度（dp）：顶栏（约 54dp）+ 横向标签面板（约 40dp），
-        // 取 96dp 留余量，避免内容 WebView 覆盖顶栏与标签面板
+        // 内容 WebView 顶部预留高度（dp）：顶栏（约 54dp）+ 横向标签面板（约 45dp），
+        // 取 104dp 留余量，确保标签面板完全不被内容 WebView 覆盖
         // Content WebView top reserve (dp): topbar (~54dp) + horizontal tab panel
-        // (~40dp); use 96dp with margin so the content WebView covers neither
-        private const val TOPBAR_HEIGHT_DP = 96
+        // (~45dp); use 104dp with margin so the tab panel is never covered
+        private const val TOPBAR_HEIGHT_DP = 104
         // 全局侧边栏收起宽度（dp），内容 WebView 左侧预留，避免挡住侧边栏
         // Global sidebar collapsed width (dp); content WebViews reserve it on the
         // left to avoid covering the sidebar