diff --git a/web/src/components/Sidebar/TopicList.tsx b/web/src/components/Sidebar/TopicList.tsx
index 4145d16..370c0ff 100644
--- a/web/src/components/Sidebar/TopicList.tsx
+++ b/web/src/components/Sidebar/TopicList.tsx
@@ -56,14 +56,14 @@ export function TopicList({
           <button
             onClick={onRefresh}
             disabled={!sessionId}
-            className={`flex items-center gap-1 rounded-lg px-3 py-1.5 text-sm transition-all ${
+            className={`flex items-center gap-1 rounded-lg px-2 py-1 text-xs transition-all ${
               !sessionId
-                ? 'bg-[var(--overlay-subtle)] text-[var(--text-muted)] cursor-not-allowed'
-                : 'bg-[var(--overlay-subtle)] text-[var(--text-secondary)] hover:bg-[var(--overlay-medium)] hover:text-[var(--accent-cyan)] border border-[var(--border-color)]'
+                ? 'text-[var(--text-muted)] cursor-not-allowed'
+                : 'text-[var(--text-secondary)] hover:text-[var(--text-primary)] hover:bg-[var(--overlay-subtle)]'
             }`}
             title="刷新话题列表"
           >
-            <RefreshCw className="h-4 w-4" />
+            <RefreshCw className="h-3.5 w-3.5" />
             刷新
           </button>
         ) : (