diff --git a/pets-fe/app.json b/pets-fe/app.json
index 7f5a8cc..15629f2 100644
--- a/pets-fe/app.json
+++ b/pets-fe/app.json
@@ -8,7 +8,8 @@
     "pages/community/community",
     "pages/learn/learn",
     "pages/article/article",
-    "pages/profile/profile"
+    "pages/profile/profile",
+    "pages/ai/ai"
   ],
   "window": {
     "navigationStyle": "custom",
@@ -21,11 +22,26 @@
     "selectedColor": "#DD8420",
     "backgroundColor": "#FFFFFF",
     "list": [
-      { "pagePath": "pages/home/home", "text": "首页" },
-      { "pagePath": "pages/plan/plan", "text": "计划" },
-      { "pagePath": "pages/record/record", "text": "记录" },
-      { "pagePath": "pages/report/report", "text": "报告" },
-      { "pagePath": "pages/community/community", "text": "社区" }
+      {
+        "pagePath": "pages/home/home",
+        "text": "首页"
+      },
+      {
+        "pagePath": "pages/plan/plan",
+        "text": "计划"
+      },
+      {
+        "pagePath": "pages/record/record",
+        "text": "记录"
+      },
+      {
+        "pagePath": "pages/report/report",
+        "text": "报告"
+      },
+      {
+        "pagePath": "pages/community/community",
+        "text": "社区"
+      }
     ]
   },
   "sitemapLocation": "sitemap.json",
diff --git a/pets-fe/components/bottom-sheet/bottom-sheet.js b/pets-fe/components/bottom-sheet/bottom-sheet.js
index 6484aa3..1be5ea5 100644
--- a/pets-fe/components/bottom-sheet/bottom-sheet.js
+++ b/pets-fe/components/bottom-sheet/bottom-sheet.js
@@ -8,6 +8,13 @@ function fmtDate(iso) {
   return d.getMonth() + 1 + '月' + d.getDate() + '日';
 }
 
+// n 天后的 YYYY-MM-DD，给提醒类弹层做默认日期
+function daysLater(n) {
+  const d = new Date(Date.now() + n * 86400000);
+  const p = (x) => (x < 10 ? '0' + x : '' + x);
+  return d.getFullYear() + '-' + p(d.getMonth() + 1) + '-' + p(d.getDate());
+}
+
 function ageFromBirthday(bday) {
   if (!bday) return '';
   const b = new Date(bday);
@@ -60,7 +67,7 @@ Component({
     pet: {},
     segSel: {},
     optSel: {},
-    dateVals: { vaccine: '2026-07-21', deworm: '2026-07-15' },
+    dateVals: { vaccine: '', deworm: '' },
     wInput: '',
     wNote: '',
     poopNote: '',
@@ -87,8 +94,6 @@ Component({
     addColor: '',
     addBreed: '',
     commentText: '',
-    aiInput: '',
-    aiMessages: [],
     riskData: null,
     comments: [],
     reminders: [],
@@ -147,6 +152,9 @@ Component({
         patch.wInput = (pet.weight || '').replace('kg', '');
         patch.wNote = '';
       }
+      // 提醒日期给个合理的默认值。原本写死成固定日期，时间一过就成了「提醒昨天」
+      if (type === 'vaccine') patch.dateVals = { ...this.data.dateVals, vaccine: daysLater(30) };
+      if (type === 'deworm') patch.dateVals = { ...this.data.dateVals, deworm: daysLater(90) };
       if (type === 'editPet') {
         // 预填当前宠物档案
         patch.addName = pet.name || '';
@@ -160,15 +168,6 @@ Component({
         };
         patch.optSel = { addStage: Math.max(0, STAGES.indexOf(pet.stage)) };
       }
-      if (type === 'ai') {
-        patch.aiMessages = [
-          {
-            role: 'ai',
-            text: `我是 ${pet.name || '毛孩子'} 的养宠助手。我会优先基于档案、计划和历史记录回答，而不是泛泛聊天。`,
-          },
-        ];
-        patch.aiInput = '';
-      }
       this.setData(patch);
       this.loadSheetData(type);
     },
@@ -190,8 +189,6 @@ Component({
         api.getPoster(id).then((p) => this.setData({ poster: p })).catch(() => {});
       } else if (type === 'reportDetail' && id) {
         api.weeklyReport(id).then((r) => this.setData({ reportDetail: r })).catch(() => {});
-      } else if (type === 'ai') {
-        this.loadAIHistory();
       } else if (type === 'pro') {
         api.getPro().then((p) => this.setData({ proInfo: p })).catch(() => {});
       }
@@ -492,10 +489,18 @@ Component({
       const v = this.data.optSel[group];
       return v === undefined ? 0 : v;
     },
+    // 与 optIdx 的区别：没选就是没选，不当成选了第 0 项
+    optPicked(group) {
+      return this.data.optSel[group] !== undefined;
+    },
 
     // 异常观察 → 生成风险评估（真调后端 AI，失败回退）
     onGenRisk() {
       const id = store.currentPetId();
+      if (!this.optPicked('symp')) {
+        wx.showToast({ title: '先选一下发生了什么', icon: 'none' });
+        return;
+      }
       const symptoms = ['呕吐', '拉稀', '精神差', '皮肤红'];
       const durations = ['刚刚', '半天', '1天以上'];
       const spirits = ['正常', '一般', '明显变差'];
@@ -597,13 +602,26 @@ Component({
     },
 
     onSave() {
+      const t = this.data.innerType;
+      if (t === 'cost' && !(parseFloat(this.data.costAmount) > 0)) {
+        wx.showToast({ title: '先填个金额', icon: 'none' });
+        return;
+      }
+      if (t === 'medicine' && !(this.data.medName || '').trim()) {
+        wx.showToast({ title: '先填药品名称', icon: 'none' });
+        return;
+      }
       this.createAndClose(this.buildRecord());
     },
     onSaveWeight() {
-      let w = (this.data.wInput || '').toString().replace(/\s+/g, '');
-      if (!w) w = (this.data.pet.weight || '').replace('kg', '');
-      const num = parseFloat(w) || 0;
-      const weight = w.includes('kg') ? w : w + 'kg';
+      const w = (this.data.wInput || '').toString().replace(/\s+/g, '').replace('kg', '');
+      const num = parseFloat(w);
+      // 原来空值会静默存成「上次的体重」，等于凭空造一条假数据
+      if (!w || !(num > 0)) {
+        wx.showToast({ title: '填一个有效体重', icon: 'none' });
+        return;
+      }
+      const weight = w + 'kg';
       this.createAndClose({ type: 'weight', icon: '⚖️', title: '体重 ' + weight, num_value: num, description: (this.data.wNote || '').trim() });
     },
     onSavePhoto() {
@@ -745,35 +763,5 @@ Component({
       this.close();
     },
 
-    // AI 聊天
-    onAiInput(e) { this.setData({ aiInput: e.detail.value }); },
-    // 拉取历史对话，接在开场白之后；没有历史就保持开场白
-    loadAIHistory() {
-      api
-        .aiMessages('sheet', 30)
-        .then((list) => {
-          if (!list || !list.length) return;
-          const history = list.map((m) => ({ role: m.role === 'user' ? 'user' : 'ai', text: m.text }));
-          this.setData({ aiMessages: this.data.aiMessages.concat(history) });
-        })
-        .catch(() => {});
-    },
-    sendAI(e) {
-      const preset = e.currentTarget.dataset.text;
-      const text = (preset || this.data.aiInput || '').trim();
-      if (!text) return;
-      const msgs = this.data.aiMessages.concat([{ role: 'user', text }]);
-      this.setData({ aiMessages: msgs, aiInput: '' });
-      api
-        .aiChat({ pet_id: store.currentPetId() || null, session: 'sheet', text })
-        .then((res) => {
-          this.setData({ aiMessages: this.data.aiMessages.concat([{ role: 'ai', text: res.reply }]) });
-        })
-        .catch(() => {
-          this.setData({
-            aiMessages: this.data.aiMessages.concat([{ role: 'ai', text: '网络异常，请稍后再试。' }]),
-          });
-        });
-    },
   },
 });
diff --git a/pets-fe/components/bottom-sheet/bottom-sheet.wxml b/pets-fe/components/bottom-sheet/bottom-sheet.wxml
index c1f5ee7..49d23cb 100644
--- a/pets-fe/components/bottom-sheet/bottom-sheet.wxml
+++ b/pets-fe/components/bottom-sheet/bottom-sheet.wxml
@@ -33,7 +33,7 @@ module.exports.sel = function (map, key, index, def) {
       </view></view>
       <view class="field"><label>颜色/备注</label>
         <textarea class="textarea" placeholder="颜色、次数、是否带血、是否有异味等" placeholder-class="placeholder" value="{{poopNote}}" bindinput="onPoopNote"></textarea></view>
-      <button class="btn btn-primary btn-block" data-text="排便记录：正常" data-icon="💩" bindtap="onSave">保存记录</button>
+      <button class="btn btn-primary btn-block" bindtap="onSave">保存记录</button>
     </block>
 
     <!-- 记录饮食 -->
@@ -46,7 +46,7 @@ module.exports.sel = function (map, key, index, def) {
         <view class="seg-btn {{u.sel(segSel,'food',1,0)?'selected':''}}" data-group="food" data-index="1" bindtap="onSeg">偏少</view>
         <view class="seg-btn {{u.sel(segSel,'food',2,0)?'selected':''}}" data-group="food" data-index="2" bindtap="onSeg">不吃</view>
       </view></view>
-      <button class="btn btn-primary btn-block" data-text="饮食记录：食欲正常" data-icon="🍽️" bindtap="onSave">保存记录</button>
+      <button class="btn btn-primary btn-block" bindtap="onSave">保存记录</button>
     </block>
 
     <!-- 异常观察 -->
@@ -80,7 +80,7 @@ module.exports.sel = function (map, key, index, def) {
       <view class="sheet-p"><text class="bold">建议：</text>{{riskData ? riskData.suggestion : '继续观察精神、食欲和排便；暂停新食物；记录呕吐或腹泻次数。'}}</view>
       <view class="sheet-p"><text class="bold">建议就医：</text>{{riskData ? riskData.seek_care : '如果持续超过 24 小时，或伴随便血、精神明显变差、频繁呕吐，建议尽快就医。'}}</view>
       <view class="sheet-actions">
-        <button class="btn btn-ghost" data-text="异常观察：风险中" data-icon="🤒" bindtap="onSave">保存记录</button>
+        <button class="btn btn-ghost" bindtap="onSave">保存记录</button>
         <button class="btn btn-primary" data-type="vetSummary" bindtap="goSheet">就医摘要</button>
       </view>
     </block>
@@ -93,7 +93,7 @@ module.exports.sel = function (map, key, index, def) {
 当前体重：{{pet.weight}}
 近期重点：疫苗期、换粮观察、排便记录
 建议携带：排便/呕吐照片、饮食变化、疫苗驱虫记录。</view>
-      <button class="btn btn-primary btn-block" data-text="生成就医前摘要" data-icon="📄" bindtap="onSave">保存摘要</button>
+      <button class="btn btn-primary btn-block" bindtap="onSave">保存摘要</button>
     </block>
 
     <!-- 记录用药 -->
@@ -101,7 +101,7 @@ module.exports.sel = function (map, key, index, def) {
       <view class="sheet-h3">记录用药</view>
       <view class="field"><label>药品名称</label><input class="input" placeholder="例如：体内驱虫药" placeholder-class="placeholder" value="{{medName}}" bindinput="onMedName"/></view>
       <view class="field"><label>剂量/备注</label><input class="input" placeholder="例如：按 2.8kg 剂量" placeholder-class="placeholder" value="{{medDose}}" bindinput="onMedDose"/></view>
-      <button class="btn btn-primary btn-block" data-text="用药记录" data-icon="💊" bindtap="onSave">保存记录</button>
+      <button class="btn btn-primary btn-block" bindtap="onSave">保存记录</button>
     </block>
 
     <!-- 记一笔消费 -->
@@ -114,7 +114,7 @@ module.exports.sel = function (map, key, index, def) {
         <view class="seg-btn {{u.sel(segSel,'cost',2,0)?'selected':''}}" data-group="cost" data-index="2" bindtap="onSeg">用品</view>
       </view></view>
       <view class="field"><label>备注</label><input class="input" placeholder="例如：幼猫粮" placeholder-class="placeholder" value="{{costNote}}" bindinput="onCostNote"/></view>
-      <button class="btn btn-primary btn-block" data-text="消费记录：¥168" data-icon="💰" bindtap="onSave">保存记录</button>
+      <button class="btn btn-primary btn-block" bindtap="onSave">保存记录</button>
     </block>
 
     <!-- 疫苗提醒 -->
@@ -125,7 +125,7 @@ module.exports.sel = function (map, key, index, def) {
         <picker mode="date" value="{{dateVals.vaccine}}" data-key="vaccine" bindchange="onDate">
           <view class="picker-box">{{dateVals.vaccine}}</view>
         </picker></view>
-      <button class="btn btn-primary btn-block" data-text="疫苗提醒：7月21日" data-icon="💉" bindtap="onSave">保存提醒</button>
+      <button class="btn btn-primary btn-block" bindtap="onSave">保存提醒</button>
     </block>
 
     <!-- 驱虫提醒 -->
@@ -136,7 +136,7 @@ module.exports.sel = function (map, key, index, def) {
         <picker mode="date" value="{{dateVals.deworm}}" data-key="deworm" bindchange="onDate">
           <view class="picker-box">{{dateVals.deworm}}</view>
         </picker></view>
-      <button class="btn btn-primary btn-block" data-text="驱虫提醒：7月15日" data-icon="🛡️" bindtap="onSave">保存提醒</button>
+      <button class="btn btn-primary btn-block" bindtap="onSave">保存提醒</button>
     </block>
 
     <!-- 成长照片 -->
@@ -146,7 +146,7 @@ module.exports.sel = function (map, key, index, def) {
       <view class="poster" style="margin-bottom:28rpx">
         <view class="poster-avatar">{{pet.emoji}}</view>
         <view class="bold" style="font-size:30rpx">{{pet.name}} 的成长照片</view>
-        <view class="muted" style="font-size:24rpx;margin-top:12rpx">模拟上传预览</view>
+        <view class="muted" style="font-size:24rpx;margin-top:12rpx">支持 jpg / png，单张不超过 10MB</view>
       </view>
       <button class="btn btn-primary btn-block" bindtap="onSavePhoto">选择图片上传</button>
     </block>
@@ -184,24 +184,6 @@ module.exports.sel = function (map, key, index, def) {
     </block>
 
     <!-- 任务详情 -->
-    <!-- 问问 AI -->
-    <block wx:elif="{{innerType === 'ai'}}">
-      <view class="sheet-h3">问问 AI</view>
-      <scroll-view class="plan-chat" scroll-y="true" enhanced="{{true}}" show-scrollbar="{{false}}" style="max-height:660rpx" scroll-into-view="ai-bottom">
-        <view wx:for="{{aiMessages}}" wx:key="index" class="msg {{item.role}}">{{item.text}}</view>
-        <view id="ai-bottom"></view>
-      </scroll-view>
-      <view class="mini-options">
-        <view class="option" data-text="猫咪今天吐了一次怎么办？" bindtap="sendAI">猫咪吐了一次</view>
-        <view class="option" data-text="幼猫多久驱虫一次？" bindtap="sendAI">多久驱虫</view>
-        <view class="option" data-text="换粮后软便怎么办？" bindtap="sendAI">换粮软便</view>
-      </view>
-      <view class="ai-input-row">
-        <input class="input" placeholder="描述一下问题..." placeholder-class="placeholder"
-               value="{{aiInput}}" bindinput="onAiInput" confirm-type="send" bindconfirm="sendAI"/>
-        <button class="btn btn-primary ai-send" bindtap="sendAI">发</button>
-      </view>
-    </block>
 
     <!-- 成长海报 -->
     <block wx:elif="{{innerType === 'poster'}}">
diff --git a/pets-fe/components/nav-bar/nav-bar.wxss b/pets-fe/components/nav-bar/nav-bar.wxss
index 7ca13bc..b6fc5ec 100644
--- a/pets-fe/components/nav-bar/nav-bar.wxss
+++ b/pets-fe/components/nav-bar/nav-bar.wxss
@@ -1,19 +1,33 @@
 :host{display:block}
+
+/* 原来是一整条半透明色块，底边和页面渐变硬碰硬，屏幕上横着一道接缝。
+   改成上实下虚的渐变，并且用同一条 mask 把毛玻璃也一起淡出——
+   只淡化背景色而不淡化 blur 的话，接缝会从「色差」变成「糊边」，一样难看。 */
 .nav-wrap{
   position:fixed;top:0;left:0;right:0;z-index:100;
-  background:rgba(248,246,242,.82);
-  backdrop-filter:blur(28rpx);
-  -webkit-backdrop-filter:blur(28rpx);
+  background:linear-gradient(180deg,
+    rgba(250,247,242,.94) 0%,
+    rgba(250,247,242,.88) 58%,
+    rgba(250,247,242,0) 100%);
+  backdrop-filter:blur(20rpx);
+  -webkit-backdrop-filter:blur(20rpx);
+  -webkit-mask-image:linear-gradient(180deg,#000 0%,#000 62%,transparent 100%);
+  mask-image:linear-gradient(180deg,#000 0%,#000 62%,transparent 100%);
 }
 .nav-inner{
   position:relative;display:flex;align-items:center;justify-content:center;
 }
 .nav-title{
-  font-size:var(--fs-lg);font-weight:var(--fw-b);color:var(--text);
-  max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
+  font-size:var(--fs-md);font-weight:var(--fw-b);color:var(--text);
+  letter-spacing:.5rpx;
+  max-width:56%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
 }
+/* 返回键做成有边界的圆形，和右上角胶囊在视觉上对称 */
 .nav-back{
-  position:absolute;left:20rpx;top:50%;transform:translateY(-50%);
-  width:64rpx;height:64rpx;display:flex;align-items:center;justify-content:center;
-  color:var(--text);
+  position:absolute;left:var(--sp-3);top:50%;transform:translateY(-50%);
+  width:60rpx;height:60rpx;border-radius:50%;
+  display:flex;align-items:center;justify-content:center;
+  color:var(--text);background:rgba(255,255,255,.72);
+  box-shadow:0 4rpx 12rpx rgba(70,48,25,.06);
 }
+.nav-back:active{background:rgba(255,255,255,.95)}
diff --git a/pets-fe/pages/ai/ai.js b/pets-fe/pages/ai/ai.js
new file mode 100644
index 0000000..b2a28bd
--- /dev/null
+++ b/pets-fe/pages/ai/ai.js
@@ -0,0 +1,107 @@
+const store = require('../../utils/store.js');
+const api = require('../../utils/api.js');
+const { toastErr } = require('../../utils/ui.js');
+
+const SESSION = 'chat';
+const PRESETS = ['猫咪今天吐了一次怎么办？', '幼猫多久驱虫一次？', '换粮后软便怎么办？', '疫苗打完要注意什么？'];
+
+// 打字机：每帧吐几个字。太快没效果，太慢让人等，30ms/2 字接近正常朗读速度。
+const TYPE_STEP = 2;
+const TYPE_INTERVAL = 30;
+
+Page({
+  data: {
+    pet: {},
+    messages: [],
+    input: '',
+    presets: PRESETS,
+    sending: false,
+    loaded: false,
+  },
+  onLoad() {
+    this._unsub = store.subscribe((pet) => this.setData({ pet }));
+    store
+      .ready()
+      .then(() => {
+        this.setData({ pet: store.getPet() });
+        this.loadHistory();
+      })
+      .catch((e) => toastErr(e));
+  },
+  onUnload() {
+    if (this._unsub) this._unsub();
+    this.stopTyping();
+  },
+
+  loadHistory() {
+    const opening = {
+      role: 'ai',
+      text: '我是' + (store.getPet().name || '毛孩子') + '的养宠助手。我会优先根据档案、计划和历史记录回答，而不是泛泛聊天。',
+    };
+    api
+      .aiMessages(SESSION, 50)
+      .then((list) => {
+        const history = (list || []).map((m) => ({ role: m.role === 'user' ? 'user' : 'ai', text: m.text }));
+        this.setData({ messages: [opening].concat(history), loaded: true }, () => this.scrollToBottom());
+      })
+      .catch(() => this.setData({ messages: [opening], loaded: true }));
+  },
+
+  onInput(e) {
+    this.setData({ input: e.detail.value });
+  },
+
+  onSend(e) {
+    const preset = e.currentTarget && e.currentTarget.dataset.text;
+    const text = (preset || this.data.input || '').trim();
+    if (!text || this.data.sending) return;
+
+    // 先把用户消息和一个空的 AI 气泡放上去，AI 气泡随后逐字填充
+    const messages = this.data.messages.concat([
+      { role: 'user', text },
+      { role: 'ai', text: '', pending: true },
+    ]);
+    this.setData({ messages, input: '', sending: true }, () => this.scrollToBottom());
+
+    api
+      .aiChat({ pet_id: store.currentPetId() || null, session: SESSION, text })
+      .then((res) => this.typewrite(res.reply || '（没有返回内容）'))
+      .catch((e) => this.typewrite(e.message || '网络异常，请稍后再试。'));
+  },
+
+  // 逐字把回复填进最后一个气泡
+  typewrite(full) {
+    this.stopTyping();
+    const idx = this.data.messages.length - 1;
+    let n = 0;
+    this._timer = setInterval(() => {
+      n = Math.min(full.length, n + TYPE_STEP);
+      this.setData({ [`messages[${idx}].text`]: full.slice(0, n) });
+      if (n % 20 === 0) this.scrollToBottom();
+      if (n >= full.length) {
+        this.stopTyping();
+        this.setData({ [`messages[${idx}].pending`]: false, sending: false }, () => this.scrollToBottom());
+      }
+    }, TYPE_INTERVAL);
+  },
+  stopTyping() {
+    if (this._timer) {
+      clearInterval(this._timer);
+      this._timer = null;
+    }
+  },
+  // 打字过程中点一下可以跳过，不用干等
+  onSkip() {
+    if (!this.data.sending) return;
+    this.stopTyping();
+    this.setData({ sending: false });
+  },
+
+  scrollToBottom() {
+    this.setData({ scrollInto: 'chat-bottom' });
+  },
+
+  onShareAppMessage() {
+    return { title: '肉垫计划 · AI 养宠助手', path: '/pages/ai/ai' };
+  },
+});
diff --git a/pets-fe/pages/ai/ai.json b/pets-fe/pages/ai/ai.json
new file mode 100644
index 0000000..6594cd8
--- /dev/null
+++ b/pets-fe/pages/ai/ai.json
@@ -0,0 +1,6 @@
+{
+  "usingComponents": {
+    "nav-bar": "/components/nav-bar/nav-bar",
+    "pt-icon": "/components/pt-icon/index"
+  }
+}
diff --git a/pets-fe/pages/ai/ai.wxml b/pets-fe/pages/ai/ai.wxml
new file mode 100644
index 0000000..e444230
--- /dev/null
+++ b/pets-fe/pages/ai/ai.wxml
@@ -0,0 +1,28 @@
+<nav-bar title="AI 养宠助手" show-back="{{true}}"></nav-bar>
+
+<scroll-view class="chat-scroll" scroll-y="{{true}}" enhanced="{{true}}" show-scrollbar="{{false}}"
+             scroll-into-view="{{scrollInto}}" scroll-with-animation="{{true}}" bindtap="onSkip">
+  <view class="chat-body">
+    <view wx:for="{{messages}}" wx:key="index" class="row row-{{item.role}}">
+      <view wx:if="{{item.role === 'ai'}}" class="ai-avatar"><pt-icon name="ai" size="{{34}}"></pt-icon></view>
+      <view class="bubble bubble-{{item.role}}">
+        <text>{{item.text}}</text><text wx:if="{{item.pending}}" class="caret">▌</text>
+      </view>
+    </view>
+    <view id="chat-bottom" class="chat-bottom"></view>
+  </view>
+</scroll-view>
+
+<view class="dock">
+  <scroll-view wx:if="{{!sending}}" class="presets" scroll-x="{{true}}" enhanced="{{true}}" show-scrollbar="{{false}}">
+    <view wx:for="{{presets}}" wx:key="*this" class="preset" data-text="{{item}}" bindtap="onSend">{{item}}</view>
+  </scroll-view>
+  <view class="input-row">
+    <input class="input" placeholder="描述一下 {{pet.name || '毛孩子'}} 的情况…" placeholder-class="placeholder"
+           value="{{input}}" bindinput="onInput" confirm-type="send" bindconfirm="onSend"
+           adjust-position="{{true}}" cursor-spacing="20"/>
+    <view class="send {{input ? 'on' : ''}}" bindtap="onSend">
+      <pt-icon name="{{sending ? 'clock' : 'next'}}" size="{{34}}"></pt-icon>
+    </view>
+  </view>
+</view>
diff --git a/pets-fe/pages/ai/ai.wxss b/pets-fe/pages/ai/ai.wxss
new file mode 100644
index 0000000..c06e288
--- /dev/null
+++ b/pets-fe/pages/ai/ai.wxss
@@ -0,0 +1,43 @@
+/* 整页聊天：上面滚动区自适应，下面输入区固定，中间不留空 */
+.chat-scroll{flex:1;min-height:0}
+.chat-body{padding:var(--sp-3) var(--pad-x) var(--sp-5)}
+.chat-bottom{height:1rpx}
+
+.row{display:flex;align-items:flex-start;gap:var(--sp-2);margin-bottom:var(--sp-4)}
+.row-user{justify-content:flex-end}
+.ai-avatar{
+  width:60rpx;height:60rpx;border-radius:var(--r-sm);flex:none;margin-top:4rpx;
+  display:flex;align-items:center;justify-content:center;
+  background:var(--cta);color:#fff;
+}
+.bubble{
+  max-width:76%;border-radius:var(--r-md);padding:var(--sp-3) var(--sp-4);
+  font-size:var(--fs-md);line-height:1.62;word-break:break-word;
+}
+.bubble-ai{background:#fff;box-shadow:var(--sd-1);border-top-left-radius:var(--r-xs)}
+.bubble-user{background:var(--primary-soft);color:var(--primary-ink);border-top-right-radius:var(--r-xs)}
+/* 打字光标 */
+.caret{color:var(--primary);animation:blink .9s steps(1) infinite}
+@keyframes blink{50%{opacity:0}}
+
+/* 底部输入区 */
+.dock{
+  flex:none;background:rgba(255,255,255,.94);
+  backdrop-filter:blur(28rpx);-webkit-backdrop-filter:blur(28rpx);
+  border-top:1rpx solid var(--line);
+  padding:var(--sp-3) var(--pad-x) calc(var(--sp-3) + env(safe-area-inset-bottom));
+}
+.presets{white-space:nowrap;margin-bottom:var(--sp-3)}
+.preset{
+  display:inline-block;height:var(--h-sm);line-height:var(--h-sm);padding:0 var(--sp-4);
+  margin-right:var(--sp-2);border-radius:var(--r-full);border:1rpx solid var(--line);
+  background:#fff;color:var(--text-2);font-size:var(--fs-sm);
+}
+.input-row{display:flex;align-items:center;gap:var(--sp-3)}
+.input-row .input{flex:1;background:var(--surface-2)}
+.send{
+  width:88rpx;height:88rpx;border-radius:var(--r-md);flex:none;
+  display:flex;align-items:center;justify-content:center;
+  background:var(--line);color:#fff;transition:.16s ease;
+}
+.send.on{background:var(--cta)}
diff --git a/pets-fe/pages/community/community.js b/pets-fe/pages/community/community.js
index 65bc7b9..b2c994d 100644
--- a/pets-fe/pages/community/community.js
+++ b/pets-fe/pages/community/community.js
@@ -102,7 +102,7 @@ Page({
     wx.navigateTo({ url: '/pages/learn/learn' });
   },
   onFab() {
-    this.setData({ sheetType: 'ai', sheetPostId: '', sheetShow: true });
+    wx.navigateTo({ url: '/pages/ai/ai' });
   },
   // 长按自己的帖子可删除
   onLongPressPost(e) {
diff --git a/pets-fe/pages/home/home.js b/pets-fe/pages/home/home.js
index 22f96a7..488a97d 100644
--- a/pets-fe/pages/home/home.js
+++ b/pets-fe/pages/home/home.js
@@ -189,7 +189,7 @@ Page({
     this.openSheetType('editPet');
   },
   onFab() {
-    this.openSheetType('ai');
+    wx.navigateTo({ url: '/pages/ai/ai' });
   },
   goProfile() {
     wx.navigateTo({ url: '/pages/profile/profile' });
diff --git a/pets-fe/pages/home/home.wxml b/pets-fe/pages/home/home.wxml
index 4f2ff22..6aa8c07 100644
--- a/pets-fe/pages/home/home.wxml
+++ b/pets-fe/pages/home/home.wxml
@@ -79,7 +79,7 @@
       <view class="sh-title">AI 今日建议</view>
     </view>
     <view class="ai-text">{{summary.advice || '正在生成今日建议…'}}</view>
-    <view class="btn btn-dark btn-block ai-cta" data-type="ai" bindtap="openSheet">
+    <view class="btn btn-dark btn-block ai-cta" bindtap="onFab">
       <pt-icon name="ai" size="{{32}}"></pt-icon>问问 AI 养宠助手
     </view>
   </view>
diff --git a/pets-fe/pages/learn/learn.js b/pets-fe/pages/learn/learn.js
index fc92938..ddec272 100644
--- a/pets-fe/pages/learn/learn.js
+++ b/pets-fe/pages/learn/learn.js
@@ -35,7 +35,7 @@ Page({
     this.setData({ sheetShow: false });
   },
   onFab() {
-    this.setData({ sheetType: 'ai', sheetShow: true });
+    wx.navigateTo({ url: '/pages/ai/ai' });
   },
   onShareAppMessage() {
     return { title: '新手养宠知识合集', path: '/pages/learn/learn' };
diff --git a/pets-fe/pages/plan/plan.js b/pets-fe/pages/plan/plan.js
index 111159b..528b853 100644
--- a/pets-fe/pages/plan/plan.js
+++ b/pets-fe/pages/plan/plan.js
@@ -178,7 +178,7 @@ Page({
     this.setData({ sheetType: 'addPet', sheetShow: true });
   },
   onFab() {
-    this.setData({ sheetType: 'ai', sheetShow: true });
+    wx.navigateTo({ url: '/pages/ai/ai' });
   },
   onShareAppMessage() {
     return { title: '我给毛孩子做了份养护计划', path: '/pages/plan/plan' };
diff --git a/pets-fe/pages/profile/profile.js b/pets-fe/pages/profile/profile.js
index 167b9e0..7f6d451 100644
--- a/pets-fe/pages/profile/profile.js
+++ b/pets-fe/pages/profile/profile.js
@@ -68,7 +68,7 @@ Page({
     this.loadSummary();
   },
   onFab() {
-    this.setData({ sheetType: 'ai', sheetShow: true });
+    wx.navigateTo({ url: '/pages/ai/ai' });
   },
   onShareAppMessage() {
     return { title: '肉垫计划 · 新手养宠助手', path: '/pages/home/home' };
diff --git a/pets-fe/pages/record/record.js b/pets-fe/pages/record/record.js
index 6adc7a2..7a7beef 100644
--- a/pets-fe/pages/record/record.js
+++ b/pets-fe/pages/record/record.js
@@ -245,7 +245,7 @@ Page({
     this.openSheetType('addPet');
   },
   onFab() {
-    this.openSheetType('ai');
+    wx.navigateTo({ url: '/pages/ai/ai' });
   },
   onShareAppMessage() {
     return { title: '用肉垫计划记录毛孩子的成长', path: '/pages/record/record' };
diff --git a/pets-fe/pages/report/report.js b/pets-fe/pages/report/report.js
index c064f85..f8eeb97 100644
--- a/pets-fe/pages/report/report.js
+++ b/pets-fe/pages/report/report.js
@@ -59,7 +59,7 @@ Page({
     this.setData({ sheetType: 'addPet', sheetShow: true });
   },
   onFab() {
-    this.setData({ sheetType: 'ai', sheetShow: true });
+    wx.navigateTo({ url: '/pages/ai/ai' });
   },
   onShareAppMessage() {
     return { title: '看看我家毛孩子的成长报告', path: '/pages/report/report' };