diff --git a/pages/case/archive-detail.vue b/pages/case/archive-detail.vue
index 628ef24..4be1445 100644
--- a/pages/case/archive-detail.vue
+++ b/pages/case/archive-detail.vue
@@ -119,10 +119,10 @@
       />
     </view>
 
-    <view v-if="showBindWechat" class="footer">
-      <button class="bind-btn" @click="bindWechat">
-        <uni-icons type="email" size="18" color="#fff" />
-        <text class="bind-text">关联患者微信</text>
+    <view v-if="showGoChat" class="footer">
+      <button class="bind-btn" @click="goChat">
+        <uni-icons type="chat-filled" size="18" color="#fff" />
+        <text class="bind-text">去聊天</text>
       </button>
     </view>
 
@@ -262,6 +262,7 @@ const archive = ref({
   creator: '',
   createdByDoctor: true,
   hasBindWechat: false,
+  chatGroupId: '',
   notes: '',
   groupIds: []
 });
@@ -283,6 +284,17 @@ function getCorpId() {
   return String(d.corpId || a.corpId || team.corpId || '') || '';
 }
 
+function getCurrentTeamId() {
+  const team = uni.getStorageSync(CURRENT_TEAM_STORAGE_KEY) || {};
+  return String(team?.teamId || team?._id || team?.id || '') || '';
+}
+
+function normalizeGroupId(v) {
+  const s = String(v || '').trim();
+  if (!s) return '';
+  return s.startsWith('GROUP') ? s.slice(5) : s;
+}
+
 function normalizeArchiveFromApi(raw) {
   const r = raw && typeof raw === 'object' ? raw : {};
   const next = {
@@ -302,6 +314,7 @@ function normalizeArchiveFromApi(raw) {
     creator: r.creator || '',
     notes: r.notes || r.remark || '',
     groupIds: Array.isArray(r.groupIds) ? r.groupIds : [],
+    chatGroupId: normalizeGroupId(r.chatGroupId || r.groupId || r.groupID || r.imGroupId || r.imGroupID || r.consultGroupId || ''),
   };
   return next;
 }
@@ -330,6 +343,23 @@ async function fetchArchive() {
     saveToStorage();
     loadTeamMembers();
     await fetchTeamGroups(true);
+    chatGroupId.value = normalizeGroupId(archive.value.chatGroupId || '');
+    if (!chatGroupId.value) {
+      refreshChatRoom();
+    } else {
+      const meta = await getChatRoomMeta(chatGroupId.value);
+      const ok = isChatRoomForArchive(meta, archiveId.value);
+      const currentTeamId = getCurrentTeamId();
+      const metaTeamId = String(meta?.teamId || meta?.team?.teamId || meta?.team?._id || '');
+      if (!ok || (currentTeamId && metaTeamId && metaTeamId !== currentTeamId)) {
+        chatGroupId.value = '';
+        archive.value.chatGroupId = '';
+        refreshChatRoom();
+      } else {
+        archive.value.chatGroupId = chatGroupId.value;
+      }
+    }
+    saveToStorage();
     // 档案信息刷新后，tabs 的位置可能变化，重新测量
     nextTick(() => setTimeout(measureTabsTop, 30));
   } catch (e) {
@@ -473,16 +503,20 @@ onLoad((options) => {
   fromChat.value = options?.fromChat === 'true' || options?.fromChat === true;
 
   const cached = uni.getStorageSync(STORAGE_KEY);
-  if (cached && typeof cached === 'object') {
+  const cachedObj = cached && typeof cached === 'object' ? cached : null;
+  const cachedId = cachedObj ? String(cachedObj._id || cachedObj.id || '') : '';
+  const canUseCached = Boolean(cachedObj && (!cachedId || !archiveId.value || cachedId === archiveId.value));
+  if (canUseCached) {
     archive.value = {
       ...archive.value,
       ...cached,
       groupIds: Array.isArray(cached.groupIds) ? cached.groupIds : archive.value.groupIds
     };
+    chatGroupId.value = normalizeGroupId(archive.value.chatGroupId || '');
   }
 
   if (!archive.value.mobile) {
-    const mobiles = cached && Array.isArray(cached.mobiles) ? cached.mobiles : [];
+    const mobiles = canUseCached && cachedObj && Array.isArray(cachedObj.mobiles) ? cachedObj.mobiles : [];
     if (mobiles.length) archive.value.mobile = String(mobiles[0]);
   }
 
@@ -512,12 +546,14 @@ onReady(() => {
 
 onShow(() => {
   const cached = uni.getStorageSync(STORAGE_KEY);
-  if (cached && typeof cached === 'object') {
+  const cachedId = cached && typeof cached === 'object' ? String(cached._id || cached.id || '') : '';
+  if (cached && typeof cached === 'object' && (!cachedId || !archiveId.value || cachedId === archiveId.value)) {
     archive.value = {
       ...archive.value,
       ...cached,
       groupIds: Array.isArray(cached.groupIds) ? cached.groupIds : archive.value.groupIds,
     };
+    chatGroupId.value = normalizeGroupId(archive.value.chatGroupId || '');
   }
   setTimeout(measureTabsTop, 30);
   fetchArchive();
@@ -560,8 +596,10 @@ const createText = computed(() => {
   return '';
 });
 
-const showBindWechat = computed(() => Boolean(archive.value.createdByDoctor && !archive.value.hasBindWechat));
-const floatingBottom = computed(() => (showBindWechat.value ? 90 : 16));
+const chatGroupId = ref('');
+const currentChatGroupId = computed(() => normalizeGroupId(chatGroupId.value || ''));
+const showGoChat = computed(() => Boolean(currentChatGroupId.value));
+const floatingBottom = computed(() => (showGoChat.value ? 90 : 16));
 
 // const contactTitle = computed(() => (archive.value.mobile ? '联系方式' : '添加联系电话'));
 // const notesTitle = computed(() => (archive.value.notes ? '备注' : '添加备注'));
@@ -575,10 +613,140 @@ const goEdit = () => {
   uni.navigateTo({ url: `/pages/case/archive-edit?archiveId=${encodeURIComponent(archiveId.value || '')}` });
 };
 
-const bindWechat = () => {
-  uni.showToast({ title: '关联患者微信功能待接入', icon: 'none' });
+const goChat = async () => {
+  let gid = normalizeGroupId(currentChatGroupId.value || '');
+  if (!gid) {
+    await refreshChatRoom();
+    gid = normalizeGroupId(currentChatGroupId.value || '');
+  }
+  if (!gid) {
+    toast('暂无可进入的会话');
+    return;
+  }
+
+  const meta = await getChatRoomMeta(gid);
+  const ok = isChatRoomForArchive(meta, archiveId.value);
+  const currentTeamId = getCurrentTeamId();
+  const metaTeamId = String(meta?.teamId || meta?.team?.teamId || meta?.team?._id || '');
+  if (!ok || (currentTeamId && metaTeamId && metaTeamId !== currentTeamId)) {
+    chatGroupId.value = '';
+    archive.value.chatGroupId = '';
+    saveToStorage();
+    await refreshChatRoom();
+    gid = normalizeGroupId(currentChatGroupId.value || '');
+  }
+  if (!gid) {
+    toast('暂无可进入的会话');
+    return;
+  }
+
+  const conversationID = `GROUP${gid}`;
+  uni.navigateTo({
+    url: `/pages/message/index?conversationID=${encodeURIComponent(conversationID)}&groupID=${encodeURIComponent(gid)}&fromCase=true`,
+  });
 };
 
+const isRefreshingChatRoom = ref(false);
+let lastRefreshChatRoomAt = 0;
+
+function isChatRoomForArchive(meta, customerId) {
+  const cid = String(meta?.customerId || '');
+  const pid = String(meta?.patientId || '');
+  const id = String(customerId || '');
+  if (!meta || !id) return false;
+  return (cid && cid === id) || (pid && pid === id);
+}
+
+async function getChatRoomMeta(groupId) {
+  const gid = normalizeGroupId(groupId || '');
+  if (!gid) return null;
+  try {
+    const res = await api('getGroupListByGroupId', { groupId: gid }, false);
+    if (!res?.success || !res?.data) return null;
+    return res.data;
+  } catch (e) {
+    return null;
+  }
+}
+
+function parseAnyTimeMs(v) {
+  if (v === null || v === undefined) return 0;
+  if (typeof v === 'number') return v;
+  const s = String(v).trim();
+  if (!s) return 0;
+  if (/^\d{10,13}$/.test(s)) return Number(s.length === 10 ? `${s}000` : s);
+  const d = dayjs(s);
+  return d.isValid() ? d.valueOf() : 0;
+}
+
+async function refreshChatRoom() {
+  const customerId = String(archiveId.value || '');
+  if (!customerId) return;
+  if (isRefreshingChatRoom.value) return;
+  const now = Date.now();
+  if (now - lastRefreshChatRoomAt < 5000) return;
+  lastRefreshChatRoomAt = now;
+
+  isRefreshingChatRoom.value = true;
+  try {
+    const corpId = getCorpId();
+    const teamId = getCurrentTeamId();
+
+    const baseQuery = {
+      corpId,
+      customerId,
+      page: 1,
+      pageSize: 50,
+    };
+
+    const queryWithTeam = teamId ? { ...baseQuery, teamId } : baseQuery;
+    let detailRes = await api('getGroupList', queryWithTeam, false);
+    let details = Array.isArray(detailRes?.data?.list) ? detailRes.data.list : [];
+
+    if (!details.length && teamId) {
+      detailRes = await api('getGroupList', baseQuery, false);
+      details = Array.isArray(detailRes?.data?.list) ? detailRes.data.list : [];
+    }
+
+    if (!detailRes?.success || !details.length) {
+      chatGroupId.value = '';
+      archive.value.chatGroupId = '';
+      return;
+    }
+
+    const currentTeamId = getCurrentTeamId();
+    const detailsForCurrentTeam = currentTeamId
+      ? details.filter((g) => String(g?.teamId || g?.team?._id || g?.team?.teamId || '') === currentTeamId)
+      : [];
+    const candidates = detailsForCurrentTeam.length ? detailsForCurrentTeam : details;
+
+    const statusRank = (s) => (s === 'processing' ? 3 : s === 'pending' ? 2 : 1);
+    candidates.sort((a, b) => {
+      const ra = statusRank(String(a?.orderStatus || ''));
+      const rb = statusRank(String(b?.orderStatus || ''));
+      if (rb !== ra) return rb - ra;
+      const ta = parseAnyTimeMs(a?.updatedAt) || parseAnyTimeMs(a?.createdAt);
+      const tb = parseAnyTimeMs(b?.updatedAt) || parseAnyTimeMs(b?.createdAt);
+      return tb - ta;
+    });
+
+    const best = candidates[0] || {};
+    const gid = normalizeGroupId(best.groupId || best.groupID || best.group_id || '');
+    if (gid) {
+      chatGroupId.value = String(gid);
+      archive.value.chatGroupId = chatGroupId.value;
+      saveToStorage();
+    } else {
+      chatGroupId.value = '';
+      archive.value.chatGroupId = '';
+    }
+  } catch (e) {
+    // ignore
+  } finally {
+    isRefreshingChatRoom.value = false;
+  }
+}
+
 const makeCall = () => {
   if (archive.value.mobile) {
     uni.makePhoneCall({ phoneNumber: archive.value.mobile });
diff --git a/pages/home/message-home.vue b/pages/home/message-home.vue
index 654726d..48566e9 100644
--- a/pages/home/message-home.vue
+++ b/pages/home/message-home.vue
@@ -467,11 +467,11 @@
 			console.log("已清空本地未读数:", conversation.name);
 		}
 
-		// 跳转到聊天页面
-		uni.navigateTo({
-			url: `/pages/message/index?conversationID=${conversation.conversationID}&groupID=${conversation.groupID}`,
-		});
-	};
+		// 跳转到聊天页面
+		uni.navigateTo({
+			url: `/pages/message/index?conversationID=${encodeURIComponent(conversation.conversationID)}&groupID=${encodeURIComponent(conversation.groupID)}`,
+		});
+	};
 
 	// 加载更多
 	const handleLoadMore = () => {
@@ -693,4 +693,4 @@
 		font-size: 24rpx;
 		color: #999;
 	}
-</style>
\ No newline at end of file
+</style>
diff --git a/pages/message/index.vue b/pages/message/index.vue
index 2dcb4b8..8fe4adf 100644
--- a/pages/message/index.vue
+++ b/pages/message/index.vue
@@ -358,23 +358,35 @@ function getBubbleClass(message) {
   return message.flow === "out" ? "user-bubble" : "doctor-bubble";
 }
 
-// 页面加载
-onLoad((options) => {
-  groupId.value = options.groupID || "";
-  messageList.value = [];
-  isLoading.value = false;
-  if (options.conversationID) {
-    chatInfo.value.conversationID = options.conversationID;
-    timChatManager.setConversationID(options.conversationID);
-    console.log("设置当前会话ID:", options.conversationID);
-  }
-  if (options.userID) {
-    chatInfo.value.userID = options.userID;
-  }
-
-  checkLoginAndInitTIM();
-  updateNavigationTitle();
-});
+// 页面加载
+onLoad((options) => {
+  const decodeQueryValue = (v) => {
+    const s = typeof v === "string" ? v : String(v || "");
+    if (!s) return "";
+    try {
+      return decodeURIComponent(s);
+    } catch (e) {
+      return s;
+    }
+  };
+
+  const rawGroupId = decodeQueryValue(options.groupID || "");
+  groupId.value = rawGroupId.startsWith("GROUP") ? rawGroupId.replace(/^GROUP/, "") : rawGroupId;
+  messageList.value = [];
+  isLoading.value = false;
+  if (options.conversationID) {
+    const cid = decodeQueryValue(options.conversationID);
+    chatInfo.value.conversationID = cid;
+    timChatManager.setConversationID(cid);
+    console.log("设置当前会话ID:", cid);
+  }
+  if (options.userID) {
+    chatInfo.value.userID = decodeQueryValue(options.userID);
+  }
+
+  checkLoginAndInitTIM();
+  updateNavigationTitle();
+});
 
 // 检查登录状态并初始化IM
 const checkLoginAndInitTIM = async () => {
diff --git a/pages/message/message.vue b/pages/message/message.vue
index 6309e1a..6a0eb3f 100644
--- a/pages/message/message.vue
+++ b/pages/message/message.vue
@@ -467,11 +467,11 @@
 			console.log("已清空本地未读数:", conversation.name);
 		}
 
-		// 跳转到聊天页面
-		uni.navigateTo({
-			url: `/pages/message/index?conversationID=${conversation.conversationID}&groupID=${conversation.groupID}`,
-		});
-	};
+		// 跳转到聊天页面
+		uni.navigateTo({
+			url: `/pages/message/index?conversationID=${encodeURIComponent(conversation.conversationID)}&groupID=${encodeURIComponent(conversation.groupID)}`,
+		});
+	};
 
 	// 加载更多
 	const handleLoadMore = () => {
@@ -693,4 +693,4 @@
 		font-size: 24rpx;
 		color: #999;
 	}
-</style>
\ No newline at end of file
+</style>