diff --git a/admin.php b/admin.php
index 9200c6c..d8b3914 100644
--- a/admin.php
+++ b/admin.php
@@ -80,8 +80,9 @@ $settings = $pdo->query("SELECT setting_key, setting_value FROM settings")->fetc
             border-right: 1px solid var(--border-color);
             padding: 40px 24px; 
             box-shadow: 1px 0 0 rgba(0,0,0,0.02);
+            z-index: 1000;
         }
-        .main { margin-left: 260px; padding: 50px; }
+        .main { margin-left: 260px; padding: 50px; min-height: 100vh; }
         .nav-link { 
             color: #475569; 
             font-weight: 600;
@@ -92,6 +93,7 @@ $settings = $pdo->query("SELECT setting_key, setting_value FROM settings")->fetc
             align-items: center;
             gap: 12px;
             padding: 14px 18px;
+            position: relative;
         }
         .nav-link:hover { background-color: #f1f5f9; color: var(--primary); }
         .nav-link.active { 
@@ -99,6 +101,18 @@ $settings = $pdo->query("SELECT setting_key, setting_value FROM settings")->fetc
             color: white; 
             box-shadow: 0 4px 12px rgba(59, 130, 246, 0.25);
         }
+        .badge-notification {
+            position: absolute;
+            right: 12px;
+            top: 50%;
+            transform: translateY(-50%);
+            background: #ef4444;
+            color: white;
+            font-size: 10px;
+            padding: 2px 6px;
+            border-radius: 10px;
+            display: none;
+        }
         .stat-card { 
             background-color: var(--surface);
             border: 1px solid var(--border-color); 
@@ -120,16 +134,57 @@ $settings = $pdo->query("SELECT setting_key, setting_value FROM settings")->fetc
         .form-control { border: 1.5px solid var(--border-color); border-radius: 12px; padding: 12px 16px; background: #f8fafc; font-weight: 500; }
         .form-control:focus { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.08); }
         
-        .table thead th {
-            background: #f8fafc;
-            border: none;
-            color: var(--text-muted);
-            font-weight: 700;
-            text-transform: uppercase;
-            font-size: 11px;
-            padding: 15px 20px;
-            letter-spacing: 0.5px;
+        /* Chat Workbench Styles */
+        .chat-workbench {
+            height: calc(100vh - 200px);
+            display: flex;
+            background: white;
+            border-radius: 24px;
+            overflow: hidden;
+            border: 1px solid var(--border-color);
         }
+        .user-list {
+            width: 300px;
+            border-right: 1px solid var(--border-color);
+            overflow-y: auto;
+        }
+        .chat-area {
+            flex: 1;
+            display: flex;
+            flex-direction: column;
+            background: #f8fafc;
+        }
+        .user-item {
+            padding: 20px;
+            border-bottom: 1px solid #f1f5f9;
+            cursor: pointer;
+            transition: all 0.2s;
+            position: relative;
+        }
+        .user-item:hover { background: #f8fafc; }
+        .user-item.active { background: #eff6ff; border-left: 4px solid var(--primary); }
+        .user-badge {
+            position: absolute;
+            right: 20px;
+            bottom: 20px;
+            background: #ef4444;
+            color: white;
+            font-size: 10px;
+            padding: 2px 6px;
+            border-radius: 10px;
+        }
+        .chat-messages {
+            flex: 1;
+            padding: 30px;
+            overflow-y: auto;
+            display: flex;
+            flex-direction: column;
+            gap: 15px;
+        }
+        .msg { max-width: 80%; padding: 12px 16px; border-radius: 16px; font-size: 14px; line-height: 1.5; }
+        .msg-user { align-self: flex-start; background: white; border: 1px solid var(--border-color); border-bottom-left-radius: 4px; }
+        .msg-admin { align-self: flex-end; background: var(--primary); color: white; border-bottom-right-radius: 4px; }
+        .chat-input { padding: 20px; background: white; border-top: 1px solid var(--border-color); display: flex; gap: 10px; }
     </style>
 </head>
 <body>
@@ -147,6 +202,10 @@ $settings = $pdo->query("SELECT setting_key, setting_value FROM settings")->fetc
     <nav class="nav flex-column">
         <a class="nav-link <?= $action === 'dashboard' ? 'active' : '' ?>" href="?action=dashboard"><i class="fas fa-chart-line"></i> 数据概览</a>
         <a class="nav-link <?= $action === 'recharges' ? 'active' : '' ?>" href="?action=recharges"><i class="fas fa-wallet"></i> 充值审核</a>
+        <a class="nav-link <?= $action === 'support' ? 'active' : '' ?>" href="?action=support">
+            <i class="fas fa-headset"></i> 客服工作台
+            <span class="badge-notification" id="chatBadge">0</span>
+        </a>
         <a class="nav-link <?= $action === 'settings' ? 'active' : '' ?>" href="?action=settings"><i class="fas fa-cog"></i> 系统设置</a>
         <hr class="text-muted opacity-10 my-4">
         <a class="nav-link" href="dashboard.php" style="color: #64748b;"><i class="fas fa-reply"></i> 返回前台系统</a>
@@ -158,6 +217,7 @@ $settings = $pdo->query("SELECT setting_key, setting_value FROM settings")->fetc
         <h2 class="fw-bold"><?= [
             'dashboard' => '核心数据概览',
             'recharges' => '充值审核中心',
+            'support' => '客服工作台 (Live Chat)',
             'settings' => '系统全局参数配置'
         ][$action] ?></h2>
     </div>
@@ -231,6 +291,115 @@ $settings = $pdo->query("SELECT setting_key, setting_value FROM settings")->fetc
                 </table>
             </div>
         </div>
+    <?php elseif ($action === 'support'): ?>
+        <div class="chat-workbench">
+            <div class="user-list" id="chatUserList">
+                <div class="p-4 text-center text-muted">加载中...</div>
+            </div>
+            <div class="chat-area">
+                <div id="chatMessages" class="chat-messages">
+                    <div class="h-100 d-flex align-items-center justify-content-center text-muted flex-column">
+                        <i class="fas fa-comments fa-3x mb-3 opacity-20"></i>
+                        <p>请在左侧选择一个用户开始对话</p>
+                    </div>
+                </div>
+                <div class="chat-input" id="chatInputArea" style="display: none;">
+                    <input type="text" id="adminMsgInput" class="form-control" placeholder="输入回复内容...">
+                    <button class="btn btn-primary" onclick="sendAdminMessage()"><i class="fas fa-paper-plane"></i></button>
+                </div>
+            </div>
+        </div>
+
+        <script>
+            let activeUserId = null;
+            let lastMessageCount = 0;
+
+            async function loadChatUsers() {
+                try {
+                    const res = await fetch('ajax_handler.php?action=get_chat_users');
+                    const data = await res.json();
+                    if (data.code === 0) {
+                        const list = document.getElementById('chatUserList');
+                        list.innerHTML = '';
+                        data.data.forEach(user => {
+                            const item = document.createElement('div');
+                            item.className = `user-item ${activeUserId == user.id ? 'active' : ''}`;
+                            item.onclick = () => selectUser(user.id, user.username);
+                            item.innerHTML = `
+                                <div class="d-flex justify-content-between align-items-start mb-1">
+                                    <span class="fw-bold text-dark">${user.username}</span>
+                                    <span class="small text-muted" style="font-size: 10px;">${new Date(user.last_time).toLocaleTimeString([], {hour: '2-digit', minute:'2-digit'})}</span>
+                                </div>
+                                <div class="small text-muted text-truncate" style="max-width: 180px;">${user.last_message}</div>
+                                ${user.unread_count > 0 ? `<span class="user-badge">${user.unread_count}</span>` : ''}
+                            `;
+                            list.appendChild(item);
+                        });
+                    }
+                } catch(e) {}
+            }
+
+            async function selectUser(userId, username) {
+                activeUserId = userId;
+                document.getElementById('chatInputArea').style.display = 'flex';
+                loadMessages(true); // force reload
+                loadChatUsers(); // Refresh to clear badge
+            }
+
+            async function loadMessages(force = false) {
+                if (!activeUserId) return;
+                try {
+                    const res = await fetch(`ajax_handler.php?action=get_messages&user_id=${activeUserId}`);
+                    const data = await res.json();
+                    if (data.code === 0) {
+                        if (!force && data.data.length === lastMessageCount) return;
+                        
+                        const box = document.getElementById('chatMessages');
+                        box.innerHTML = '';
+                        data.data.forEach(msg => {
+                            const div = document.createElement('div');
+                            div.className = `msg msg-${msg.sender}`;
+                            div.textContent = msg.message;
+                            box.appendChild(div);
+                        });
+                        box.scrollTop = box.scrollHeight;
+                        lastMessageCount = data.data.length;
+                        
+                        // If it's the support page, we might be marking them as read, so refresh users list
+                        loadChatUsers();
+                        checkNotifications();
+                    }
+                } catch(e) {}
+            }
+
+            async function sendAdminMessage() {
+                const input = document.getElementById('adminMsgInput');
+                const msg = input.value.trim();
+                if (!msg || !activeUserId) return;
+
+                const formData = new FormData();
+                formData.append('message', msg);
+                formData.append('user_id', activeUserId);
+
+                const res = await fetch('ajax_handler.php?action=send_message', {
+                    method: 'POST',
+                    body: formData
+                });
+                const data = await res.json();
+                if (data.code === 0) {
+                    input.value = '';
+                    loadMessages(true);
+                }
+            }
+
+            document.getElementById('adminMsgInput').addEventListener('keypress', (e) => {
+                if(e.key === 'Enter') sendAdminMessage();
+            });
+
+            setInterval(loadChatUsers, 5000);
+            setInterval(() => loadMessages(false), 3000);
+            loadChatUsers();
+        </script>
     <?php elseif ($action === 'settings'): ?>
         <div class="card">
             <form method="POST" action="?action=update_settings">
@@ -277,5 +446,25 @@ $settings = $pdo->query("SELECT setting_key, setting_value FROM settings")->fetc
     <?php endif; ?>
 </div>
 
+<script>
+    async function checkNotifications() {
+        try {
+            const res = await fetch(`ajax_handler.php?action=check_new_messages`);
+            const data = await res.json();
+            if (data.code === 0) {
+                const badge = document.getElementById('chatBadge');
+                if (data.unread_total > 0) {
+                    badge.textContent = data.unread_total;
+                    badge.style.display = 'block';
+                } else {
+                    badge.style.display = 'none';
+                }
+            }
+        } catch(e) {}
+    }
+    setInterval(checkNotifications, 10000);
+    checkNotifications();
+</script>
+
 </body>
 </html>
\ No newline at end of file
diff --git a/ajax_handler.php b/ajax_handler.php
index 459dc77..dd14cad 100644
--- a/ajax_handler.php
+++ b/ajax_handler.php
@@ -61,11 +61,12 @@ switch ($action) {
 
     case 'get_countries':
         $res = $api->getCountries();
-        if ($res['code'] === 0 && isset($res['msg'])) {
-            $res['data'] = $res['msg'];
-            unset($res['msg']);
+        if ($res && (int)$res['code'] === 0) {
+            $data = $res['msg'] ?? $res['data'] ?? [];
+            echo json_encode(['code' => 0, 'data' => $data]);
+        } else {
+            echo json_encode($res ?: ['code' => 500, 'msg' => 'Unknown API error']);
         }
-        echo json_encode($res);
         break;
 
     case 'get_services':
@@ -73,19 +74,17 @@ switch ($action) {
         $service = $_GET['service'] ?? '';
         $res = $api->getServices($country, $service);
         
-        if ($res['code'] === 0 && isset($res['msg'])) {
-            $res['data'] = $res['msg'];
-            unset($res['msg']);
-        }
-
-        if ($res['code'] === 0 && isset($res['data'])) {
-            foreach ($res['data'] as &$item) {
+        if ($res && (int)$res['code'] === 0) {
+            $data = $res['msg'] ?? $res['data'] ?? [];
+            foreach ($data as &$item) {
                 if (isset($item['cost'])) {
-                    $item['cost'] = round($item['cost'] * PRICE_MULTIPLIER, 2);
+                    $item['cost'] = round((float)$item['cost'] * PRICE_MULTIPLIER, 2);
                 }
             }
+            echo json_encode(['code' => 0, 'data' => $data]);
+        } else {
+            echo json_encode($res ?: ['code' => 500, 'msg' => 'Unknown API error']);
         }
-        echo json_encode($res);
         break;
 
     case 'get_number':
@@ -109,7 +108,7 @@ switch ($action) {
         }
 
         $res = $api->getNumber($service_id);
-        if ($res['code'] == 0) {
+        if ($res && (int)$res['code'] === 0) {
             $pdo->beginTransaction();
             try {
                 $stmt = $pdo->prepare("UPDATE users SET balance = balance - ? WHERE id = ?");
@@ -124,7 +123,7 @@ switch ($action) {
                 echo json_encode(['code' => 500, 'msg' => 'Database error: ' . $e->getMessage()]);
             }
         } else {
-            echo json_encode($res);
+            echo json_encode($res ?: ['code' => 500, 'msg' => 'API Error']);
         }
         break;
 
@@ -136,11 +135,11 @@ switch ($action) {
         }
 
         $res = $api->getSms($request_id);
-        if ($res['code'] == 0 && $res['msg'] == 'success') {
+        if ($res && (int)$res['code'] === 0 && ($res['msg'] ?? '') == 'success') {
             $stmt = $pdo->prepare("UPDATE sms_orders SET sms_content = ?, status = 'received' WHERE request_id = ?");
             $stmt->execute([$res['sms_code'], $request_id]);
         }
-        echo json_encode($res);
+        echo json_encode($res ?: ['code' => 500, 'msg' => 'API Error']);
         break;
 
     case 'release_number':
@@ -167,11 +166,11 @@ switch ($action) {
         }
 
         $res = $api->setStatus($request_id, 'reject');
-        if ($res['code'] == 0) {
+        if ($res && (int)$res['code'] === 0) {
             $stmt = $pdo->prepare("UPDATE sms_orders SET status = 'canceled' WHERE request_id = ?");
             $stmt->execute([$request_id]);
         }
-        echo json_encode($res);
+        echo json_encode($res ?: ['code' => 500, 'msg' => 'API Error']);
         break;
 
     case 'get_active_orders':
@@ -243,7 +242,102 @@ switch ($action) {
         }
         break;
 
+    // --- Chat Actions ---
+    case 'send_message':
+        $message = trim($_POST['message'] ?? '');
+        $target_user_id = $_POST['user_id'] ?? $_SESSION['user_id'];
+        
+        if (!$message) {
+            echo json_encode(['code' => 400, 'msg' => 'Message is empty']);
+            break;
+        }
+
+        $sender = 'user';
+        // Check if current user is admin
+        $stmt = $pdo->prepare("SELECT role FROM users WHERE id = ?");
+        $stmt->execute([$_SESSION['user_id']]);
+        $currentUser = $stmt->fetch();
+        if ($currentUser['role'] === 'admin') {
+            $sender = 'admin';
+        }
+
+        $stmt = $pdo->prepare("INSERT INTO support_messages (user_id, sender, message, is_read) VALUES (?, ?, ?, 0)");
+        $stmt->execute([$target_user_id, $sender, $message]);
+        echo json_encode(['code' => 0, 'msg' => 'Sent']);
+        break;
+
+    case 'get_messages':
+        $target_user_id = $_GET['user_id'] ?? $_SESSION['user_id'];
+        
+        // Security: non-admins can only see their own messages
+        $stmt = $pdo->prepare("SELECT role FROM users WHERE id = ?");
+        $stmt->execute([$_SESSION['user_id']]);
+        $currentUser = $stmt->fetch();
+        
+        $isAdmin = ($currentUser['role'] === 'admin');
+        if (!$isAdmin && $target_user_id != $_SESSION['user_id']) {
+            echo json_encode(['code' => 403, 'msg' => 'Forbidden']);
+            break;
+        }
+
+        // Mark as read logic
+        if ($isAdmin && $target_user_id != $_SESSION['user_id']) {
+            // Admin is reading user messages
+            $stmt = $pdo->prepare("UPDATE support_messages SET is_read = 1 WHERE user_id = ? AND sender = 'user'");
+            $stmt->execute([$target_user_id]);
+        } else if (!$isAdmin && $target_user_id == $_SESSION['user_id']) {
+            // User is reading admin messages
+            $stmt = $pdo->prepare("UPDATE support_messages SET is_read = 1 WHERE user_id = ? AND sender = 'admin'");
+            $stmt->execute([$target_user_id]);
+        }
+
+        $stmt = $pdo->prepare("SELECT * FROM support_messages WHERE user_id = ? ORDER BY created_at ASC");
+        $stmt->execute([$target_user_id]);
+        echo json_encode(['code' => 0, 'data' => $stmt->fetchAll()]);
+        break;
+
+    case 'get_chat_users':
+        // Admin only
+        $stmt = $pdo->prepare("SELECT role FROM users WHERE id = ?");
+        $stmt->execute([$_SESSION['user_id']]);
+        $currentUser = $stmt->fetch();
+        if ($currentUser['role'] !== 'admin') {
+            echo json_encode(['code' => 403, 'msg' => 'Forbidden']);
+            break;
+        }
+
+        $stmt = $pdo->query("
+            SELECT u.id, u.username, m.message as last_message, m.created_at as last_time,
+            (SELECT COUNT(*) FROM support_messages WHERE user_id = u.id AND sender = 'user' AND is_read = 0) as unread_count
+            FROM users u
+            JOIN (
+                SELECT user_id, MAX(created_at) as max_time
+                FROM support_messages
+                GROUP BY user_id
+            ) last_msg ON u.id = last_msg.user_id
+            JOIN support_messages m ON m.user_id = u.id AND m.created_at = last_msg.max_time
+            ORDER BY m.created_at DESC
+        ");
+        echo json_encode(['code' => 0, 'data' => $stmt->fetchAll()]);
+        break;
+
+    case 'check_new_messages':
+        // Admin only
+        $stmt = $pdo->prepare("SELECT role FROM users WHERE id = ?");
+        $stmt->execute([$_SESSION['user_id']]);
+        $currentUser = $stmt->fetch();
+        if ($currentUser['role'] !== 'admin') {
+            echo json_encode(['code' => 403, 'msg' => 'Forbidden']);
+            break;
+        }
+
+        $stmt = $pdo->query("SELECT COUNT(*) FROM support_messages WHERE sender = 'user' AND is_read = 0");
+        $count = $stmt->fetchColumn();
+        
+        echo json_encode(['code' => 0, 'unread_total' => $count]);
+        break;
+
     default:
         echo json_encode(['code' => 404, 'msg' => 'Action not found']);
         break;
-}
\ No newline at end of file
+}
diff --git a/api/LocalLubanApi.php b/api/LocalLubanApi.php
index 2cba3bb..9b35885 100644
--- a/api/LocalLubanApi.php
+++ b/api/LocalLubanApi.php
@@ -17,6 +17,9 @@ class LubanSMS {
     }
 
     private function request($endpoint, $params = []) {
+        if (!$this->apikey) {
+            return ['code' => 500, 'msg' => 'API Key not configured'];
+        }
         $params['apikey'] = $this->apikey;
         $url = $this->baseUrl . $endpoint . '?' . http_build_query($params);
         
@@ -24,15 +27,28 @@ class LubanSMS {
         curl_setopt($ch, CURLOPT_URL, $url);
         curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
         curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
+        curl_setopt($ch, CURLOPT_TIMEOUT, 30);
         $response = curl_exec($ch);
+        
+        if ($response === false) {
+            $error = curl_error($ch);
+            curl_close($ch);
+            return ['code' => 500, 'msg' => 'CURL Error: ' . $error];
+        }
+        
         $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
         curl_close($ch);
 
         if ($httpCode !== 200) {
-            return ['code' => 500, 'msg' => 'Network error or server down'];
+            return ['code' => 500, 'msg' => 'API Server returned HTTP ' . $httpCode];
         }
 
-        return json_decode($response, true);
+        $decoded = json_decode($response, true);
+        if (json_last_error() !== JSON_ERROR_NONE) {
+            return ['code' => 500, 'msg' => 'Invalid JSON from API'];
+        }
+
+        return $decoded;
     }
 
     public function getBalance() {
@@ -67,4 +83,4 @@ class LubanSMS {
             'status' => $status
         ]);
     }
-}
+}
\ No newline at end of file
diff --git a/dashboard.php b/dashboard.php
index 5d4980c..f926439 100644
--- a/dashboard.php
+++ b/dashboard.php
@@ -376,9 +376,18 @@ $notice_text = $settings['notice_text'] ?? '欢迎使用全球接码平台！';
     });
 
     async function loadCountries() {
-        const res = await fetch(`${apiHandler}?action=get_countries`);
-        const data = await res.json();
-        if (data.code === 0) { allCountries = data.data; renderCountries(); }
+        try {
+            const res = await fetch(`${apiHandler}?action=get_countries`);
+            const data = await res.json();
+            if (data.code === 0) { 
+                allCountries = Array.isArray(data.data) ? data.data : []; 
+                renderCountries(); 
+            } else {
+                document.getElementById('countriesList').innerHTML = '<div class="p-3 text-center text-muted small">加载国家列表失败</div>';
+            }
+        } catch (e) {
+            document.getElementById('countriesList').innerHTML = '<div class="p-3 text-center text-muted small">连接服务器失败</div>';
+        }
     }
 
     function toggleDropdown(id) {
@@ -387,20 +396,36 @@ $notice_text = $settings['notice_text'] ?? '欢迎使用全球接码平台！';
         hideAllDropdowns();
         if (!show) {
             d.classList.add('show');
-            setTimeout(() => d.querySelector('input').focus(), 50);
+            const input = d.querySelector('input');
+            if (input) setTimeout(() => input.focus(), 50);
         }
     }
     function hideAllDropdowns() { document.querySelectorAll('.dropdown-menu-custom').forEach(d => d.classList.remove('show')); }
 
     function renderCountries(filter = '') {
         const container = document.getElementById('countriesList');
+        if (!container) return;
         container.innerHTML = '';
-        const filtered = filter ? allCountries.filter(c => c.name_zh.includes(filter) || c.name_en.toLowerCase().includes(filter.toLowerCase())) : allCountries;
         
+        if (!Array.isArray(allCountries) || allCountries.length === 0) {
+            container.innerHTML = '<div class="p-3 text-center text-muted small">暂无可用国家</div>';
+            return;
+        }
+
+        const filtered = filter ? allCountries.filter(c => 
+            (c.name_zh && c.name_zh.includes(filter)) || 
+            (c.name_en && c.name_en.toLowerCase().includes(filter.toLowerCase()))
+        ) : allCountries;
+        
+        if (filtered.length === 0) {
+            container.innerHTML = '<div class="p-3 text-center text-muted small">未找到匹配国家</div>';
+            return;
+        }
+
         filtered.slice(0, 100).forEach(c => {
             const div = document.createElement('div');
             div.className = 'list-item';
-            div.innerHTML = `<div><span class="fw-bold">${c.name_zh}</span><span class="text-muted ms-2 small">${c.name_en}</span></div><i class="fas fa-chevron-right small opacity-25"></i>`;
+            div.innerHTML = `<div><span class="fw-bold">${c.name_zh || '未知'}</span><span class="text-muted ms-2 small">${c.name_en || ''}</span></div><i class="fas fa-chevron-right small opacity-25"></i>`;
             div.onclick = () => { selectCountry(c); };
             container.appendChild(div);
         });
@@ -408,7 +433,14 @@ $notice_text = $settings['notice_text'] ?? '欢迎使用全球接码平台！';
 
     function renderServices(services) {
         const container = document.getElementById('servicesList');
+        if (!container) return;
         container.innerHTML = '';
+        
+        if (!Array.isArray(services) || services.length === 0) {
+            container.innerHTML = '<div class="p-3 text-center text-muted small">暂无项目</div>';
+            return;
+        }
+
         services.forEach(s => {
             const div = document.createElement('div');
             div.className = 'list-item';
@@ -425,14 +457,22 @@ $notice_text = $settings['notice_text'] ?? '欢迎使用全球接码平台！';
         if (searchTimeout) clearTimeout(searchTimeout);
         if (!q) { renderServices(popularServices); return; }
         searchTimeout = setTimeout(async () => {
-            const res = await fetch(`${apiHandler}?action=get_services&service=${encodeURIComponent(q)}`);
-            const data = await res.json();
-            if (data.code === 0) {
-                const unique = [];
-                const map = new Map();
-                data.data.forEach(i => { if(!map.has(i.service_name)){ map.set(i.service_name, true); unique.push({name: i.service_name}); } });
-                renderServices(unique);
-            }
+            try {
+                const res = await fetch(`${apiHandler}?action=get_services&service=${encodeURIComponent(q)}`);
+                const data = await res.json();
+                if (data.code === 0) {
+                    const unique = [];
+                    const map = new Map();
+                    const services = Array.isArray(data.data) ? data.data : [];
+                    services.forEach(i => { 
+                        if(i.service_name && !map.has(i.service_name)){ 
+                            map.set(i.service_name, true); 
+                            unique.push({name: i.service_name}); 
+                        } 
+                    });
+                    renderServices(unique);
+                }
+            } catch (e) {}
         }, 300);
     }
 
@@ -440,7 +480,8 @@ $notice_text = $settings['notice_text'] ?? '欢迎使用全球接码平台！';
         currentCountry = c;
         const l = document.getElementById('countryLabel');
         l.textContent = c.name_zh;
-        l.classList.replace('placeholder', 'val');
+        l.classList.remove('placeholder');
+        l.classList.add('val');
         hideAllDropdowns();
         loadQuotation();
     }
@@ -449,7 +490,8 @@ $notice_text = $settings['notice_text'] ?? '欢迎使用全球接码平台！';
         currentService = s;
         const l = document.getElementById('serviceLabel');
         l.textContent = s.name;
-        l.classList.replace('placeholder', 'val');
+        l.classList.remove('placeholder');
+        l.classList.add('val');
         hideAllDropdowns();
         loadQuotation();
     }
@@ -466,8 +508,9 @@ $notice_text = $settings['notice_text'] ?? '欢迎使用全球接码平台！';
             const data = await res.json();
             if (data.code === 0) {
                 body.innerHTML = '';
-                if (!data.data.length) { body.innerHTML = '<div class="p-5 text-center text-muted"><i class="fas fa-exclamation-circle fa-2x mb-3 opacity-25"></i><div>该地区暂无此服务，请尝试其他国家</div></div>'; return; }
-                data.data.forEach(s => {
+                const services = Array.isArray(data.data) ? data.data : [];
+                if (!services.length) { body.innerHTML = '<div class="p-5 text-center text-muted"><i class="fas fa-exclamation-circle fa-2x mb-3 opacity-25"></i><div>该地区暂无此服务，请尝试其他国家</div></div>'; return; }
+                services.forEach(s => {
                     const item = document.createElement('div');
                     item.className = 'quotation-item';
                     const isPop = popularServices.some(ps => ps.name === s.service_name);
@@ -490,6 +533,8 @@ $notice_text = $settings['notice_text'] ?? '欢迎使用全球接码平台！';
                     body.appendChild(item);
                 });
                 document.getElementById('lastUpdated').textContent = 'UPDATED: ' + new Date().toLocaleTimeString();
+            } else {
+                body.innerHTML = `<div class="p-5 text-center text-danger">加载行情失败: ${data.msg || '未知错误'}</div>`;
             }
         } catch (e) { body.innerHTML = '<div class="p-5 text-center text-danger">行情数据连接失败</div>'; }
     }
@@ -509,63 +554,70 @@ $notice_text = $settings['notice_text'] ?? '欢迎使用全球接码平台！';
     }
 
     async function updateBalance() {
-        const res = await fetch(`${apiHandler}?action=get_balance`);
-        const data = await res.json();
-        if (data.code === 0) document.getElementById('userBalance').textContent = '$' + data.balance;
+        try {
+            const res = await fetch(`${apiHandler}?action=get_balance`);
+            const data = await res.json();
+            if (data.code === 0) document.getElementById('userBalance').textContent = '$' + data.balance;
+        } catch (e) {}
     }
 
     async function loadActiveOrders() {
-        const res = await fetch(`${apiHandler}?action=get_active_orders`);
-        const data = await res.json();
-        const body = document.getElementById('activeTasksBody');
-        const section = document.getElementById('activeTasksSection');
-        
-        Object.values(activeTimers).forEach(t => clearInterval(t));
-        activeTimers = {};
+        try {
+            const res = await fetch(`${apiHandler}?action=get_active_orders`);
+            const data = await res.json();
+            const body = document.getElementById('activeTasksBody');
+            const section = document.getElementById('activeTasksSection');
+            
+            Object.values(activeTimers).forEach(t => clearInterval(t));
+            activeTimers = {};
 
-        if (data.code === 0 && data.data.length > 0) {
-            section.style.display = 'block';
-            body.innerHTML = '';
-            data.data.forEach(o => {
-                const exp = new Date(o.expire_at.replace(/-/g, "/")).getTime();
-                let tl = Math.floor((exp - new Date().getTime())/1000);
-                const row = document.createElement('tr');
-                row.innerHTML = `
-                    <td class="ps-4 py-4">
-                        <div class="fw-bold text-dark">${o.service_name}</div>
-                        <div class="small text-muted">${o.country_name}</div>
-                    </td>
-                    <td class="fw-bold text-primary fs-5" style="letter-spacing: 1px;">${o.number}</td>
-                    <td id="sms-${o.request_id}">
-                        ${o.status === 'received' ? `<span class="sms-badge">${o.sms_content}</span>` : `
-                        <div class="d-flex align-items-center gap-3 text-primary">
-                            <div class="spinner-grow spinner-grow-sm" style="animation-duration: 1.5s;"></div>
-                            <span class="fw-bold small" style="letter-spacing: 0.5px;">等待验证码...</span>
-                        </div>`}
-                    </td>
-                    <td><span class="badge bg-light text-dark border p-2 px-3 fw-bold" id="timer-${o.request_id}">${formatTime(tl)}</span></td>
-                    <td class="text-end pe-4">
-                        <button class="btn btn-sm btn-outline-danger fw-bold px-3 py-2 rounded-3" onclick="releaseNumber('${o.request_id}')">释放号码</button>
-                    </td>
-                `;
-                body.appendChild(row);
-                if (o.status !== 'received') { startPolling(o.request_id); startTimer(o.request_id, tl); }
-            });
-        } else { section.style.display = 'none'; }
+            if (data.code === 0 && Array.isArray(data.data) && data.data.length > 0) {
+                section.style.display = 'block';
+                body.innerHTML = '';
+                data.data.forEach(o => {
+                    const exp = new Date(o.expire_at.replace(/-/g, "/")).getTime();
+                    let tl = Math.floor((exp - new Date().getTime())/1000);
+                    const row = document.createElement('tr');
+                    row.innerHTML = `
+                        <td class="ps-4 py-4">
+                            <div class="fw-bold text-dark">${o.service_name}</div>
+                            <div class="small text-muted">${o.country_name}</div>
+                        </td>
+                        <td class="fw-bold text-primary fs-5" style="letter-spacing: 1px;">${o.number}</td>
+                        <td id="sms-${o.request_id}">
+                            ${o.status === 'received' ? `<span class="sms-badge">${o.sms_content}</span>` : `
+                            <div class="d-flex align-items-center gap-3 text-primary">
+                                <div class="spinner-grow spinner-grow-sm" style="animation-duration: 1.5s;"></div>
+                                <span class="fw-bold small" style="letter-spacing: 0.5px;">等待验证码...</span>
+                            </div>`}
+                        </td>
+                        <td><span class="badge bg-light text-dark border p-2 px-3 fw-bold" id="timer-${o.request_id}">${formatTime(tl)}</span></td>
+                        <td class="text-end pe-4">
+                            <button class="btn btn-sm btn-outline-danger fw-bold px-3 py-2 rounded-3" onclick="releaseNumber('${o.request_id}')">释放号码</button>
+                        </td>
+                    `;
+                    body.appendChild(row);
+                    if (o.status !== 'received') { startPolling(o.request_id); startTimer(o.request_id, tl); }
+                });
+            } else { section.style.display = 'none'; }
+        } catch (e) {}
     }
 
     function startPolling(rid) {
         if (activePolls[rid]) return;
         activePolls[rid] = setInterval(async () => {
-            const res = await fetch(`${apiHandler}?action=check_sms&request_id=${rid}`);
-            const data = await res.json();
-            if (data.code === 0 && data.msg === 'success') {
-                const el = document.getElementById(`sms-${rid}`);
-                if (el) el.innerHTML = `<span class="sms-badge">${data.sms_code}</span>`;
-                clearInterval(activePolls[rid]); delete activePolls[rid]; showSmsModal(data.sms_code);
-            } else if (data.code === 400) {
-                clearInterval(activePolls[rid]); delete activePolls[rid]; loadActiveOrders();
-            }
+            try {
+                const res = await fetch(`${apiHandler}?action=check_sms&request_id=${rid}`);
+                const data = await res.json();
+                if (data.code === 0 && (data.msg === 'success' || data.sms_code)) {
+                    const el = document.getElementById(`sms-${rid}`);
+                    if (el) el.innerHTML = `<span class="sms-badge">${data.sms_code}</span>`;
+                    clearInterval(activePolls[rid]); delete activePolls[rid]; showSmsModal(data.sms_code);
+                } else if (data.code === 400 || (data.code !== 0 && data.code !== 500)) {
+                    // Stop polling on permanent errors (but not network errors)
+                    clearInterval(activePolls[rid]); delete activePolls[rid]; loadActiveOrders();
+                }
+            } catch (e) {}
         }, 5000);
     }
 
@@ -580,9 +632,11 @@ $notice_text = $settings['notice_text'] ?? '欢迎使用全球接码平台！';
 
     async function releaseNumber(id) {
         if (!confirm('确定释放此号码？如果是已产生费用的任务，释放可能不会退费。')) return;
-        const res = await fetch(`${apiHandler}?action=release_number&request_id=${id}`);
-        const data = await res.json();
-        if (data.code === 0) { loadActiveOrders(); updateBalance(); } else { alert(data.msg); }
+        try {
+            const res = await fetch(`${apiHandler}?action=release_number&request_id=${id}`);
+            const data = await res.json();
+            if (data.code === 0) { loadActiveOrders(); updateBalance(); } else { alert(data.msg); }
+        } catch (e) { alert('连接服务器失败'); }
     }
 
     function formatTime(s) {
@@ -600,4 +654,4 @@ $notice_text = $settings['notice_text'] ?? '欢迎使用全球接码平台！';
     }
 </script>
 </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/support.php b/support.php
index e7c7223..447b144 100644
--- a/support.php
+++ b/support.php
@@ -13,15 +13,7 @@ $stmt = $pdo->prepare("SELECT username, balance FROM users WHERE id = ?");
 $stmt->execute([$user_id]);
 $user = $stmt->fetch();
 
-if ($_SERVER['REQUEST_METHOD'] === 'POST' && !empty($_POST['message'])) {
-    $msg = trim($_POST['message']);
-    $stmt = $pdo->prepare("INSERT INTO support_messages (user_id, sender, message) VALUES (?, 'user', ?)");
-    $stmt->execute([$user_id, $msg]);
-}
-
-$stmt = $pdo->prepare("SELECT * FROM support_messages WHERE user_id = ? ORDER BY created_at ASC");
-$stmt->execute([$user_id]);
-$messages = $stmt->fetchAll();
+// Messages will be loaded via AJAX
 ?>
 <!DOCTYPE html>
 <html lang="zh-CN">
@@ -137,16 +129,11 @@ $messages = $stmt->fetchAll();
             <div class="message message-admin">
                 <div class="message-content">您好，<?= htmlspecialchars($user['username']) ?>！我是您的专属技术支持。如果您遇到任何关于充值未到账、号码收不到码或其他系统问题，请随时在这里留言，我们会尽快回复您。</div>
             </div>
-            <?php foreach ($messages as $msg): ?>
-                <div class="message <?= $msg['sender'] === 'user' ? 'message-user' : 'message-admin' ?>">
-                    <div class="message-content"><?= htmlspecialchars($msg['message']) ?></div>
-                    <div class="small text-muted mt-2 px-1" style="font-size: 10px; font-weight: 600;"><?= date('H:i', strtotime($msg['created_at'])) ?></div>
-                </div>
-            <?php endforeach; ?>
+            <!-- Messages loaded via JS -->
         </div>
         <div class="chat-footer">
-            <form method="POST" class="d-flex gap-3">
-                <input type="text" name="message" class="form-control" placeholder="在此输入您的问题或反馈..." required autocomplete="off">
+            <form id="chatForm" class="d-flex gap-3">
+                <input type="text" id="msgInput" class="form-control" placeholder="在此输入您的问题或反馈..." required autocomplete="off">
                 <button type="submit" class="btn btn-send"><i class="fas fa-paper-plane"></i></button>
             </form>
         </div>
@@ -155,13 +142,70 @@ $messages = $stmt->fetchAll();
 
 <script>
     const chatBody = document.getElementById('chatBody');
-    chatBody.scrollTop = chatBody.scrollHeight;
-    
-    document.querySelector('form').addEventListener('submit', function() {
-        setTimeout(() => {
-            chatBody.scrollTop = chatBody.scrollHeight;
-        }, 100);
+    const chatForm = document.getElementById('chatForm');
+    const msgInput = document.getElementById('msgInput');
+    let lastMsgCount = 0;
+
+    async function loadMessages() {
+        try {
+            const res = await fetch('ajax_handler.php?action=get_messages');
+            const data = await res.json();
+            if (data.code === 0) {
+                if (data.data.length === lastMsgCount) return;
+                
+                // Keep the first welcome message
+                const welcomeMsg = chatBody.firstElementChild.outerHTML;
+                chatBody.innerHTML = welcomeMsg;
+                
+                data.data.forEach(msg => {
+                    const div = document.createElement('div');
+                    div.className = `message ${msg.sender === 'user' ? 'message-user' : 'message-admin'}`;
+                    div.innerHTML = `
+                        <div class="message-content">${escapeHtml(msg.message)}</div>
+                        <div class="small text-muted mt-2 px-1" style="font-size: 10px; font-weight: 600;">${new Date(msg.created_at).toLocaleTimeString([], {hour: '2-digit', minute:'2-digit'})}</div>
+                    `;
+                    chatBody.appendChild(div);
+                });
+                
+                lastMsgCount = data.data.length;
+                chatBody.scrollTop = chatBody.scrollHeight;
+            }
+        } catch (e) {
+            console.error('Failed to load messages');
+        }
+    }
+
+    chatForm.addEventListener('submit', async (e) => {
+        e.preventDefault();
+        const msg = msgInput.value.trim();
+        if (!msg) return;
+
+        const formData = new FormData();
+        formData.append('message', msg);
+
+        try {
+            const res = await fetch('ajax_handler.php?action=send_message', {
+                method: 'POST',
+                body: formData
+            });
+            const data = await res.json();
+            if (data.code === 0) {
+                msgInput.value = '';
+                loadMessages();
+            }
+        } catch (e) {
+            alert('发送失败，请检查网络');
+        }
     });
+
+    function escapeHtml(text) {
+        const div = document.createElement('div');
+        div.textContent = text;
+        return div.innerHTML;
+    }
+
+    setInterval(loadMessages, 3000);
+    loadMessages();
 </script>
 <style>
 @keyframes pulse {