diff --git a/TUICallKit-Vue3/tongji/pages/weekly.vue b/TUICallKit-Vue3/tongji/pages/weekly.vue
index b92012a8..353204ab 100644
--- a/TUICallKit-Vue3/tongji/pages/weekly.vue
+++ b/TUICallKit-Vue3/tongji/pages/weekly.vue
@@ -193,19 +193,26 @@
             <view class="st-float-close" @click="floatAskClosed = true">
                 <text class="st-float-close-icon">×</text>
             </view>
-            <view class="st-float-inner">
+            <view class="st-float-inner" :class="{ 'is-expanded': dietAiAskExpanded }">
                 <view class="st-float-icon">
                     <TongjiIcon name="sparkles" size="sm" color="#006c49" />
                 </view>
-                <input
+                <textarea
                     class="st-float-input"
-                    type="text"
                     :value="dietAiAskText"
-                    placeholder="长按麦克风说话，或输入文字咨询 AI..."
+                    placeholder="输入或语音咨询 AI…"
                     placeholder-class="st-float-placeholder"
+                    :maxlength="-1"
+                    auto-height
+                    :show-confirm-bar="false"
+                    :disable-default-padding="true"
+                    :cursor-spacing="24"
                     confirm-type="send"
+                    :confirm-hold="false"
                     @input="onDietAiAskInput"
                     @confirm="askDietAiFood"
+                    @focus="onDietAiAskFocus"
+                    @blur="onDietAiAskBlur"
                 />
                 <view
                     class="st-float-mic"
@@ -519,6 +526,19 @@ const {
 /** 底部 AI 浮动卡片是否被用户收起 */
 const floatAskClosed = ref(false)
 
+/** AI 输入框是否聚焦：聚焦时输入框变大 */
+const dietAiAskFocused = ref(false)
+function onDietAiAskFocus() {
+    dietAiAskFocused.value = true
+}
+function onDietAiAskBlur() {
+    dietAiAskFocused.value = false
+}
+/** 聚焦或已有内容时展开为多行输入（内容多则自动增高） */
+const dietAiAskExpanded = computed(
+    () => dietAiAskFocused.value || String(dietAiAskText.value || '').length > 0
+)
+
 /** 键盘高度（px）：录入弹窗据此整体上移，避免输入框被键盘遮挡 */
 const keyboardHeight = ref(0)
 function onKeyboardHeightChange(res) {
diff --git a/TUICallKit-Vue3/tongji/styles/weekly-stitch.scss b/TUICallKit-Vue3/tongji/styles/weekly-stitch.scss
index c7d1160d..f22f33ff 100644
--- a/TUICallKit-Vue3/tongji/styles/weekly-stitch.scss
+++ b/TUICallKit-Vue3/tongji/styles/weekly-stitch.scss
@@ -740,13 +740,22 @@
 .weekly-page .st-float-inner {
     display: flex;
     align-items: center;
-    gap: 24rpx;
-    padding: 16rpx 16rpx 16rpx 40rpx;
+    gap: 16rpx;
+    padding: 16rpx 16rpx 16rpx 28rpx;
     border-radius: 999rpx;
     background: rgba(255, 255, 255, 0.9);
     backdrop-filter: blur(20rpx);
     border: 1rpx solid rgba(0, 108, 73, 0.1);
     box-shadow: var(--st-shadow-float);
+    transition: border-radius 0.22s ease, padding 0.22s ease, border-color 0.22s ease;
+}
+
+/* 聚焦/有内容时展开：底部对齐让输入框向上增高，圆角收敛为圆角矩形 */
+.weekly-page .st-float-inner.is-expanded {
+    align-items: flex-end;
+    border-radius: 32rpx;
+    padding: 18rpx 16rpx 18rpx 32rpx;
+    border-color: rgba(0, 108, 73, 0.28);
 }
 
 .weekly-page .st-float-icon {
@@ -763,15 +772,30 @@
 .weekly-page .st-float-input {
     flex: 1;
     min-width: 0;
-    height: 64rpx;
+    width: 100%;
+    min-height: 64rpx;
+    max-height: 240rpx;
     font-size: 28rpx;
+    line-height: 40rpx;
     color: var(--on-surface);
     background: transparent;
+    padding: 12rpx 0;
+    box-sizing: border-box;
+    transition: min-height 0.2s ease;
+}
+
+/* 聚焦时输入框变大；内容超长时由 auto-height 继续向上增高，超过上限可滚动 */
+.weekly-page .st-float-inner.is-expanded .st-float-input {
+    min-height: 104rpx;
 }
 
 .weekly-page .st-float-placeholder {
     color: rgba(60, 74, 66, 0.6);
-    font-size: 28rpx;
+    font-size: 26rpx;
+    line-height: 40rpx;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
 }
 
 .weekly-page .st-float-mic {