diff --git a/token-meter/token-meter.css b/token-meter/token-meter.css
index 6cfd3ae..2bf7191 100644
--- a/token-meter/token-meter.css
+++ b/token-meter/token-meter.css
@@ -140,4 +140,7 @@ body.dragging-side .sidebar,body.dragging-side .main{transition:none}
   .app.collapsed .sidebar{transform:translateX(-100%)}
   .app.collapsed .main{margin-left:0}
   .app.collapsed .side-toggle{left:14px;transform:rotate(180deg)}
+  /* 收起后展开按钮平移到最左并悬浮在 topbar 上方：给 topbar 左侧留出按钮占位（14px 偏移 + 28px 宽 + 间距），避免标题被挡住 */
+  .app.collapsed .topbar{padding-left:54px}
+  .topbar{transition:padding-left .3s}
 }
\ No newline at end of file