diff --git a/src/pages/TaskAssistant.tsx b/src/pages/TaskAssistant.tsx
index 45f2c22..3de904f 100644
--- a/src/pages/TaskAssistant.tsx
+++ b/src/pages/TaskAssistant.tsx
@@ -207,8 +207,8 @@ function ChatPage() {
                 style={{ backgroundColor: msg.role === 'user' ? token.colorPrimary : token.colorSuccess, flexShrink: 0 }} />
               <div style={{ maxWidth: '75%', minWidth: 0 }}>
                 {/* Thinking — auto expand during streaming */}
-                {msg.thinking && (
-                  <Collapse size="small" ghost defaultActiveKey={msg.streaming ? ['thinking'] : []} items={[{
+                {msg.thinking && msg.thinking !== msg.content && (
+                  <Collapse size="small" ghost defaultActiveKey={[]} items={[{
                     key: 'thinking', label: <Text style={{ fontSize: 12, color: token.colorTextSecondary }}><BulbOutlined /> 思考过程{msg.streaming ? <LoadingOutlined style={{ marginLeft: 6, fontSize: 11 }} spin /> : null}</Text>,
                     children: <div style={{ fontSize: 13, color: token.colorTextSecondary, whiteSpace: 'pre-wrap', lineHeight: 1.7, maxHeight: 200, overflowY: 'auto', padding: '4px 0' }}>{msg.thinking}</div>,
                   }]} style={{ marginBottom: 8, background: 'transparent' }} />