diff --git a/src/components/SubtitlePanel.vue b/src/components/SubtitlePanel.vue
index 13544ef..03447c5 100644
--- a/src/components/SubtitlePanel.vue
+++ b/src/components/SubtitlePanel.vue
@@ -135,39 +135,12 @@
             <div
               class="bubble-text"
               :class="{
-                collapsed: isCollapsed(msg.id) && isLongText(msg.content),
                 'text-user': msg.role === 'user',
                 'text-ai': msg.role === 'ai',
               }"
-              :ref="(el) => setMsgRef(msg.id, el)"
             >
               {{ msg.content }}
             </div>
-            <button
-              v-if="isLongText(msg.content)"
-              class="expand-btn"
-              @click="toggleCollapse(msg.id)"
-            >
-              {{ isCollapsed(msg.id) ? "展开全部" : "收起" }}
-              <svg
-                viewBox="0 0 24 24"
-                width="12"
-                height="12"
-                fill="none"
-                stroke="currentColor"
-                stroke-width="2.5"
-                stroke-linecap="round"
-                stroke-linejoin="round"
-                :style="{
-                  transform: isCollapsed(msg.id)
-                    ? 'rotate(0deg)'
-                    : 'rotate(180deg)',
-                  transition: 'transform 0.2s',
-                }"
-              >
-                <polyline points="6 9 12 15 18 9" />
-              </svg>
-            </button>
           </div>
         </div>
       </div>
@@ -202,76 +175,14 @@
           class="merged-bubble"
         >
           <div v-if="pair.user" class="merged-user-section">
-            <div
-              class="merged-text text-user"
-              :class="{
-                collapsed:
-                  isCollapsed(pair.user.id) && isLongText(pair.user.content),
-              }"
-            >
+            <div class="merged-text text-user">
               {{ pair.user.content }}
             </div>
-            <button
-              v-if="isLongText(pair.user.content)"
-              class="expand-btn"
-              @click="toggleCollapse(pair.user.id)"
-            >
-              {{ isCollapsed(pair.user.id) ? "展开全部" : "收起" }}
-              <svg
-                viewBox="0 0 24 24"
-                width="12"
-                height="12"
-                fill="none"
-                stroke="currentColor"
-                stroke-width="2.5"
-                stroke-linecap="round"
-                stroke-linejoin="round"
-                :style="{
-                  transform: isCollapsed(pair.user.id)
-                    ? 'rotate(0deg)'
-                    : 'rotate(180deg)',
-                  transition: 'transform 0.2s',
-                }"
-              >
-                <polyline points="6 9 12 15 18 9" />
-              </svg>
-            </button>
           </div>
           <div v-if="pair.ai" class="merged-ai-section">
-            <div
-              class="merged-text text-ai"
-              :class="{
-                collapsed:
-                  isCollapsed(pair.ai.id) && isLongText(pair.ai.content),
-              }"
-            >
+            <div class="merged-text text-ai">
               {{ pair.ai.content }}
             </div>
-            <button
-              v-if="isLongText(pair.ai.content)"
-              class="expand-btn"
-              @click="toggleCollapse(pair.ai.id)"
-            >
-              {{ isCollapsed(pair.ai.id) ? "展开全部" : "收起" }}
-              <svg
-                viewBox="0 0 24 24"
-                width="12"
-                height="12"
-                fill="none"
-                stroke="currentColor"
-                stroke-width="2.5"
-                stroke-linecap="round"
-                stroke-linejoin="round"
-                :style="{
-                  transform: isCollapsed(pair.ai.id)
-                    ? 'rotate(0deg)'
-                    : 'rotate(180deg)',
-                  transition: 'transform 0.2s',
-                }"
-              >
-                <polyline points="6 9 12 15 18 9" />
-              </svg>
-            </button>
           </div>
         </div>
       </div>
@@ -391,29 +302,6 @@ const scrollAIToBottom = () => {
   }
 };
 
-// ===== 长文本折叠/展开 =====
-const COLLAPSE_THRESHOLD = 120; // 超过120字符视为长文本
-const collapsedIds = ref<Set<string>>(new Set());
-const msgRefs = new Map<string, HTMLElement>();
-
-const isLongText = (text: string): boolean => text.length > COLLAPSE_THRESHOLD;
-
-const isCollapsed = (id: string): boolean => collapsedIds.value.has(id);
-
-const toggleCollapse = (id: string) => {
-  if (collapsedIds.value.has(id)) {
-    collapsedIds.value.delete(id);
-  } else {
-    collapsedIds.value.add(id);
-  }
-  // 触发响应式更新
-  collapsedIds.value = new Set(collapsedIds.value);
-};
-
-const setMsgRef = (id: string, el: any) => {
-  if (el) msgRefs.set(id, el as HTMLElement);
-};
-
 // ===== 下拉框 =====
 const modeOptions = [
   { value: "ai-only" as SubtitleMode, label: "AI字幕", icon: "💬" },
@@ -532,21 +420,10 @@ watch(
   },
 );
 
-// 消息变化时：自动滚动到底部 + 新消息默认折叠
+// 消息变化时：自动滚动到底部
 watch(
   () => props.messages.length,
-  (newLen, oldLen) => {
-    // 新增的消息默认折叠
-    if (newLen > (oldLen ?? 0)) {
-      for (let i = oldLen ?? 0; i < newLen; i++) {
-        const msg = props.messages[i];
-        if (msg && isLongText(msg.content)) {
-          collapsedIds.value.add(msg.id);
-        }
-      }
-      collapsedIds.value = new Set(collapsedIds.value);
-    }
-
+  () => {
     nextTick(() => {
       scrollToBottom();
     });
@@ -861,45 +738,6 @@ const scrollToBottom = () => {
     color: #ffffff;
     text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
   }
-
-  &.collapsed {
-    max-height: 4.8em;
-    position: relative;
-
-    &::after {
-      content: "";
-      position: absolute;
-      bottom: 0;
-      left: 0;
-      right: 0;
-      height: 2em;
-      background: linear-gradient(transparent, rgba(10, 14, 30, 0.5));
-      pointer-events: none;
-      border-radius: 0 0 8px 8px;
-    }
-  }
-}
-
-/* ===== 展开/收起按钮 ===== */
-.expand-btn {
-  display: inline-flex;
-  align-items: center;
-  gap: 4px;
-  margin-top: 6px;
-  padding: 3px 10px;
-  background: rgba(255, 255, 255, 0.06);
-  border: 1px solid rgba(255, 255, 255, 0.1);
-  border-radius: 6px;
-  color: rgba(255, 255, 255, 0.55);
-  font-size: 11px;
-  cursor: pointer;
-  transition: all 0.2s;
-
-  &:hover {
-    background: rgba(255, 255, 255, 0.1);
-    color: rgba(255, 255, 255, 0.8);
-    border-color: rgba(255, 255, 255, 0.2);
-  }
 }
 
 /* ===== 模式3：合并气泡 ===== */
@@ -946,22 +784,6 @@ const scrollToBottom = () => {
     color: #ffffff;
     text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
   }
-
-  &.collapsed {
-    max-height: 4.8em;
-    position: relative;
-
-    &::after {
-      content: "";
-      position: absolute;
-      bottom: 0;
-      left: 0;
-      right: 0;
-      height: 2em;
-      background: linear-gradient(transparent, rgba(10, 14, 30, 0.5));
-      pointer-events: none;
-    }
-  }
 }
 
 /* ===== 1440×2560 分辨率专用样式 ===== */
@@ -991,12 +813,6 @@ const scrollToBottom = () => {
     font-weight: 500;
   }
 
-  /* 三级辅助：展开按钮 */
-  .expand-btn {
-    font-size: 17px;
-    padding: 6px 18px;
-  }
-
   /* 字幕容器：背景与边框适配大字号 */
   .ai-subtitle-bar {
     padding: 18px 24px;
@@ -1076,16 +892,5 @@ const scrollToBottom = () => {
   .bubble-text {
     font-size: 28px !important;
   }
-
-  /* 折叠高度适配（按新字号比例） */
-  .bubble-text.collapsed,
-  .merged-text.collapsed {
-    max-height: 6em;
-  }
-
-  .bubble-text.collapsed::after,
-  .merged-text.collapsed::after {
-    height: 3em;
-  }
 }
 </style>