diff --git a/server/api/chat_routes.py b/server/api/chat_routes.py
index 25dbc90..8145131 100644
--- a/server/api/chat_routes.py
+++ b/server/api/chat_routes.py
@@ -442,21 +442,16 @@ async def chat_endpoint_handler(body: dict):
                                     # 处理思考过程片段
                                     if reasoning_content:
                                         if not full_reasoning_content:
-                                            # 第一个思考片段，加标题前缀
-                                            delta_str += (
-                                                "> **💭 深度思考过程：**\n> \n> "
-                                            )
+                                            # 第一个思考片段，添加 <think> 开始标签
+                                            delta_str += "<think>"
                                         full_reasoning_content += reasoning_content
-                                        # markdown 引用块内换行需加 >
-                                        delta_str += reasoning_content.replace(
-                                            "\n", "\n> "
-                                        )
+                                        delta_str += reasoning_content
 
                                     # 处理正式回复片段
                                     if content:
                                         if not full_content and full_reasoning_content:
-                                            # 思考结束后首个正式回复，加分隔线
-                                            delta_str += "\n\n---\n\n"
+                                            # 思考结束后首个正式回复，关闭 </think> 标签
+                                            delta_str += "</think>\n\n"
                                         full_content += content
                                         delta_str += content
 
@@ -581,8 +576,7 @@ async def chat_endpoint_handler(body: dict):
                         content = msg_dict.get("content", "")
                         rc = msg_dict.get("reasoning_content", "")
                         if rc:
-                            rc_formatted = rc.replace("\n", "\n> ")
-                            content = f"> **💭 深度思考过程：**\n> \n> {rc_formatted}\n\n---\n\n{content}"
+                            content = f"<think>{rc}</think>\n\n{content}"
                     # 否则尝试从 output.text 获取内容（DashScope特定格式）
                     elif (
                         hasattr(response, "output")
diff --git a/server/utils/glm_adapter.py b/server/utils/glm_adapter.py
index a4270b7..68a614a 100644
--- a/server/utils/glm_adapter.py
+++ b/server/utils/glm_adapter.py
@@ -364,17 +364,16 @@ async def glm_stream_generator(
             # ── 思考过程（reasoning_content）────────────────────────
             if reasoning:
                 if not full_reasoning:
-                    # 首个思考片段：加 Markdown 引用块标题
-                    delta_str += "> **💭 深度思考过程：**\n> \n> "
+                    # 首个思考片段：添加 <think> 开始标签
+                    delta_str += "<think>"
                 full_reasoning += reasoning
-                # 引用块内换行需在每行前加 `> `
-                delta_str += reasoning.replace("\n", "\n> ")
+                delta_str += reasoning
 
             # ── 正式回答（content）──────────────────────────────────
             if text:
                 if not full_content and full_reasoning:
-                    # 思考结束后首次出现正式回答：加分隔线
-                    delta_str += "\n\n---\n\n"
+                    # 思考结束后首次出现正式回答：关闭 </think> 标签
+                    delta_str += "</think>\n\n"
                 full_content += text
                 delta_str += text
 
diff --git a/src/components/message/components/ThinkingNode.vue b/src/components/message/components/ThinkingNode.vue
index 5e7caca..ba6a68f 100644
--- a/src/components/message/components/ThinkingNode.vue
+++ b/src/components/message/components/ThinkingNode.vue
@@ -1,8 +1,9 @@
 <script setup lang="ts">
 import { MarkdownRender } from "markstream-vue";
 import { useClipboard } from "@vueuse/core";
+import { ref, watch } from "vue";
 
-defineProps<{
+const props = defineProps<{
   node: {
     type: "think";
     content: string;
@@ -12,6 +13,21 @@ defineProps<{
 }>();
 
 const { copy } = useClipboard({ legacy: true });
+const collapsed = ref(false);
+
+// 当思考完成时（loading 从 true 变为 false），自动折叠
+watch(
+  () => props.node.loading,
+  (newVal, oldVal) => {
+    if (oldVal === true && newVal === false) {
+      collapsed.value = true;
+    }
+  },
+);
+
+function toggleCollapse() {
+  collapsed.value = !collapsed.value;
+}
 
 async function textCopy(data: any) {
   if (typeof data === "string") {
@@ -22,64 +38,67 @@ async function textCopy(data: any) {
 
 <template>
   <div
-    class="thinking-node p-4 my-4 bg-blue-50 dark:bg-blue-900/40 rounded-md border-l-4 border-blue-400 flex items-start gap-3"
+    class="thinking-node p-4 my-4 bg-blue-50 dark:bg-blue-900/40 rounded-md border-l-4 border-blue-400"
   >
-    <div class="flex-shrink-0 mt-1">
-      <!-- decorative thinking SVG icon -->
-      <div
-        class="w-9 h-9 rounded-full bg-blue-200 dark:bg-blue-700 flex items-center justify-center text-blue-700 dark:text-blue-100"
-      >
+    <!-- 可点击的标题栏 -->
+    <div class="thinking-header" @click="toggleCollapse">
+      <div class="flex-shrink-0">
+        <!-- 思考图标 -->
+        <div
+          class="w-8 h-8 rounded-full bg-blue-200 dark:bg-blue-700 flex items-center justify-center text-blue-700 dark:text-blue-100"
+        >
+          <svg
+            class="w-4 h-4"
+            viewBox="0 0 24 24"
+            fill="none"
+            xmlns="http://www.w3.org/2000/svg"
+            aria-hidden="true"
+          >
+            <path
+              d="M12 3C7.03 3 3 6.58 3 11c0 1.86.66 3.57 1.77 4.98L4 21l5.2-1.9C10.06 19.35 11 19.5 12 19.5c4.97 0 9-3.58 9-8.5S16.97 3 12 3z"
+              stroke="currentColor"
+              stroke-width="0.8"
+              fill="currentColor"
+              opacity="0.9"
+            />
+          </svg>
+        </div>
+      </div>
+      <div class="thinking-title">
+        <strong class="text-sm">💭 深度思考</strong>
+        <!-- 加载动画 -->
+        <span v-if="node.loading" class="thinking-dots visible" aria-hidden="true">
+          <span class="dot dot-1" />
+          <span class="dot dot-2" />
+          <span class="dot dot-3" />
+        </span>
+        <span v-else class="thinking-status text-xs text-slate-500 dark:text-slate-300">
+          已完成
+        </span>
+      </div>
+      <!-- 折叠/展开箭头 -->
+      <div class="collapse-arrow" :class="{ collapsed }">
         <svg
-          class="w-5 h-5"
+          width="16"
+          height="16"
           viewBox="0 0 24 24"
           fill="none"
-          xmlns="http://www.w3.org/2000/svg"
-          aria-hidden="true"
+          stroke="currentColor"
+          stroke-width="2"
+          stroke-linecap="round"
+          stroke-linejoin="round"
         >
-          <path
-            d="M12 3C7.03 3 3 6.58 3 11c0 1.86.66 3.57 1.77 4.98L4 21l5.2-1.9C10.06 19.35 11 19.5 12 19.5c4.97 0 9-3.58 9-8.5S16.97 3 12 3z"
-            stroke="currentColor"
-            stroke-width="0.8"
-            fill="currentColor"
-            opacity="0.9"
-          />
+          <polyline points="6 9 12 15 18 9" />
         </svg>
       </div>
     </div>
-    <div class="flex-1">
-      <div class="flex items-baseline gap-3">
-        <strong class="text-sm">Thinking</strong>
-        <span class="text-xs text-slate-500 dark:text-slate-300"
-          >(assistant)</span
-        >
-        <!-- keep dots in DOM to avoid layout shift; toggle visibility with classes -->
-        <span class="ml-2" aria-hidden="true">
-          <span
-            class="thinking-dots"
-            :class="[node.loading ? 'visible' : 'hidden']"
-            aria-hidden="true"
-          >
-            <span class="dot dot-1" />
-            <span class="dot dot-2" />
-            <span class="dot dot-3" />
-          </span>
-        </span>
-      </div>
+
+    <!-- 可折叠的内容区域 -->
+    <div class="thinking-content" :class="{ collapsed }">
       <div
-        class="mt-1 text-sm leading-relaxed text-slate-800 dark:text-slate-100"
+        class="mt-3 text-sm leading-relaxed text-slate-800 dark:text-slate-100"
       >
-        <!-- sr-only live region only present when loading to announce change -->
-        <span v-if="node.loading" class="sr-only" aria-live="polite"
-          >Thinking…</span
-        >
-        <transition name="fade" mode="out-in">
-          <div
-            key="{{ node.loading ? 'loading' : 'ready' }}"
-            class="content-area"
-          >
-            <MarkdownRender :content="node.content" @copy="textCopy" />
-          </div>
-        </transition>
+        <MarkdownRender :content="node.content" @copy="textCopy" />
       </div>
     </div>
   </div>
@@ -93,33 +112,72 @@ async function textCopy(data: any) {
   color: #e6f0ff;
 }
 
-/* Animated dots for thinking state */
+/* 标题栏 */
+.thinking-header {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  cursor: pointer;
+  user-select: none;
+}
+
+.thinking-title {
+  flex: 1;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.thinking-status {
+  font-style: italic;
+}
+
+/* 折叠箭头 */
+.collapse-arrow {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 24px;
+  height: 24px;
+  color: #64748b;
+  transition: transform 0.25s ease;
+  border-radius: 4px;
+}
+.collapse-arrow:hover {
+  background: rgba(0, 0, 0, 0.06);
+}
+.dark .collapse-arrow:hover {
+  background: rgba(255, 255, 255, 0.08);
+}
+.collapse-arrow.collapsed {
+  transform: rotate(-90deg);
+}
+
+/* 可折叠内容 */
+.thinking-content {
+  max-height: 2000px;
+  overflow: hidden;
+  transition: max-height 0.35s ease, opacity 0.25s ease;
+  opacity: 1;
+}
+.thinking-content.collapsed {
+  max-height: 0;
+  opacity: 0;
+}
+
+/* 加载动画 */
 .thinking-dots {
   display: inline-flex;
   align-items: center;
   gap: 6px;
-  width: 36px;
-  justify-content: flex-start;
-  height: 12px; /* reserve vertical space so toggling doesn't collapse layout */
-  transition:
-    opacity 160ms linear,
-    transform 160ms linear;
-  opacity: 0;
+  height: 12px;
 }
 .thinking-dots .dot {
   width: 6px;
   height: 6px;
   border-radius: 9999px;
-  background: #1e3a8a; /* blue-800 */
+  background: #1e3a8a;
   opacity: 0.25;
-  transform: translateY(0);
-}
-.thinking-dots.visible {
-  opacity: 1;
-}
-.thinking-dots.hidden {
-  opacity: 0;
-  transform: translateY(0);
 }
 .thinking-dots.visible .dot-1 {
   animation: think-bounce 1s infinite ease-in-out;
@@ -150,33 +208,4 @@ async function textCopy(data: any) {
     opacity: 1;
   }
 }
-
-/* ensure content area doesn't shift when dots appear */
-.content-area {
-  min-height: 1.25rem;
-}
-.partial-content,
-.full-content {
-  transition: opacity 140ms ease;
-}
-.partial-content {
-  opacity: 0.9;
-}
-.full-content {
-  opacity: 1;
-}
-
-/* Vue transition classes for fade */
-.fade-enter-from,
-.fade-leave-to {
-  opacity: 0;
-}
-.fade-enter-active,
-.fade-leave-active {
-  transition: opacity 160ms ease;
-}
-.fade-enter-to,
-.fade-leave-from {
-  opacity: 1;
-}
 </style>