diff --git a/deploy/rust-backend-development.service b/deploy/rust-backend-development.service
index a03af11..20887e7 100644
--- a/deploy/rust-backend-development.service
+++ b/deploy/rust-backend-development.service
@@ -22,7 +22,7 @@ Environment=SSL_KEY_PATH=/etc/ssl/private/private.key
 Environment=SSL_CERT_PATH=/etc/ssl/certs/full_chain.pem
 Environment=RUST_LOG=info,rust_backend=debug
 Environment=APP_VERSION=0.2.0
-Environment=FREE_USER_DATA_LIMIT=100
+Environment=FREE_USER_DATA_LIMIT=50
 Environment=SENTRY_DSN=http://f02c7cce1dc746e2ad41b11397dab0db@127.0.0.1:9000/1
 Environment=APP_BASE_URL=https://dev.xmclassmate.top
 Environment=ALIPAY_APP_ID=2021006148681106
diff --git a/src/handlers/meta.rs b/src/handlers/meta.rs
index 2e9f340..05fd6ee 100644
--- a/src/handlers/meta.rs
+++ b/src/handlers/meta.rs
@@ -6,86 +6,207 @@ const HTML_TEMPLATE: &str = r#"<!DOCTYPE html>
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <title>大气稳定度判定系统</title>
+    <title>大气稳定度判定系统 — 环境监测助手</title>
     <style>
         * { margin: 0; padding: 0; box-sizing: border-box; }
         body {
-            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
-            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
+                         'PingFang SC', 'Microsoft YaHei', sans-serif;
+            background: #f5f7fa;
             min-height: 100vh;
-            display: flex;
-            align-items: center;
-            justify-content: center;
-            padding: 20px;
+            color: #333;
+            line-height: 1.6;
         }
-        .container {
-            background: white;
+
+        /* ===== Header ===== */
+        .hero {
+            background: linear-gradient(135deg, #07c160 0%, #06ad56 50%, #059c4c 100%);
+            padding: 60px 20px;
+            text-align: center;
+            color: #fff;
+        }
+        .hero h1 {
+            font-size: 32px;
+            font-weight: 700;
+            margin-bottom: 12px;
+            letter-spacing: 1px;
+        }
+        .hero p {
+            font-size: 16px;
+            opacity: 0.9;
+            max-width: 500px;
+            margin: 0 auto;
+        }
+
+        /* ===== Content ===== */
+        .content {
+            max-width: 800px;
+            margin: 0 auto;
+            padding: 40px 20px 60px;
+        }
+
+        .section {
+            background: #fff;
             border-radius: 16px;
-            padding: 48px;
-            max-width: 480px;
-            width: 100%;
-            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
+            padding: 32px;
+            margin-bottom: 24px;
+            box-shadow: 0 2px 12px rgba(0,0,0,0.06);
+        }
+        .section h2 {
+            font-size: 22px;
+            color: #333;
+            margin-bottom: 16px;
+            padding-bottom: 12px;
+            border-bottom: 2px solid #07c160;
+        }
+
+        .feature-grid {
+            display: grid;
+            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
+            gap: 16px;
+        }
+        .feature-card {
+            background: #f8f9fa;
+            border-radius: 12px;
+            padding: 20px;
             text-align: center;
         }
-        h1 {
+        .feature-card .icon {
+            font-size: 36px;
+            margin-bottom: 8px;
+        }
+        .feature-card h3 {
+            font-size: 16px;
             color: #333;
-            margin-bottom: 8px;
-            font-size: 28px;
+            margin-bottom: 6px;
         }
-        .subtitle {
-            color: #666;
-            margin-bottom: 32px;
-            font-size: 14px;
-        }
-        .status-box {
-            padding: 24px;
-            border-radius: 12px;
-            margin-bottom: 24px;
-        }
-        .status-ok {
-            background: #d4edda;
-            border: 1px solid #28a745;
-        }
-        .status-error {
-            background: #f8d7da;
-            border: 1px solid #dc3545;
-        }
-        .status-icon {
-            font-size: 48px;
-            margin-bottom: 16px;
-        }
-        .status-text {
-            font-size: 24px;
-            font-weight: bold;
-            margin-bottom: 8px;
-        }
-        .status-ok .status-text { color: #155724; }
-        .status-error .status-text { color: #721c24; }
-        .status-detail {
-            color: #495057;
-            font-size: 14px;
-        }
-        .version {
+        .feature-card p {
+            font-size: 13px;
             color: #999;
-            font-size: 12px;
+        }
+
+        /* ===== Status Badge ===== */
+        .status-row {
+            display: flex;
+            align-items: center;
+            gap: 12px;
+            flex-wrap: wrap;
+        }
+        .status-badge {
+            display: inline-flex;
+            align-items: center;
+            gap: 6px;
+            padding: 6px 16px;
+            border-radius: 20px;
+            font-size: 14px;
+            font-weight: 500;
+        }
+        .status-ok { background: #e8f5e9; color: #2e7d32; }
+        .status-error { background: #fbe9e7; color: #c62828; }
+
+        .stat-item {
+            display: inline-flex;
+            align-items: center;
+            gap: 4px;
+            font-size: 14px;
+            color: #666;
+            margin-right: 20px;
+        }
+
+        /* ===== Footer ===== */
+        .footer {
+            text-align: center;
+            padding: 32px 20px;
+            color: #999;
+            font-size: 13px;
+        }
+
+        /* ===== Responsive ===== */
+        @media (max-width: 480px) {
+            .hero { padding: 40px 16px; }
+            .hero h1 { font-size: 26px; }
+            .section { padding: 24px 16px; }
+            .feature-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
+            .feature-card { padding: 16px; }
         }
     </style>
 </head>
 <body>
-    <div class="container">
-        <h1>大气稳定度判定系统</h1>
-        <p class="subtitle">后端服务状态</p>
 
-        <div class="status-box {status_class}">
-            <div class="status-icon">{status_icon}</div>
-            <div class="status-text">{status_text}</div>
-            <div class="status-detail">
-                <div>数据库: {database}</div>
+    <!-- Hero -->
+    <div class="hero">
+        <h1>🌤 大气稳定度判定</h1>
+        <p>环境监测领域的专业计算工具，快速判定大气稳定度等级，判断无组织排放监测适宜性</p>
+    </div>
+
+    <!-- Content -->
+    <div class="content">
+
+        <!-- Features -->
+        <div class="section">
+            <h2>功能介绍</h2>
+            <div class="feature-grid">
+                <div class="feature-card">
+                    <div class="icon">☀️</div>
+                    <h3>太阳高度角</h3>
+                    <p>自动计算太阳倾角与高度角</p>
+                </div>
+                <div class="feature-card">
+                    <div class="icon">☁️</div>
+                    <h3>云量计算</h3>
+                    <p>云量指数与太阳辐射等级</p>
+                </div>
+                <div class="feature-card">
+                    <div class="icon">💨</div>
+                    <h3>风速风向</h3>
+                    <p>地面风速推算与风向适宜度</p>
+                </div>
+                <div class="feature-card">
+                    <div class="icon">📊</div>
+                    <h3>稳定度判定</h3>
+                    <p>输出 A-F 稳定度等级与建议</p>
+                </div>
+                <div class="feature-card">
+                    <div class="icon">📋</div>
+                    <h3>数据管理</h3>
+                    <p>保存、查看、导出检测记录</p>
+                </div>
+                <div class="feature-card">
+                    <div class="icon">💳</div>
+                    <h3>会员服务</h3>
+                    <p>无限存储，随时续费</p>
+                </div>
             </div>
         </div>
 
-        <div class="version">v{version}</div>
+        <!-- Service Status -->
+        <div class="section">
+            <h2>服务状态</h2>
+            <div class="status-row">
+                <span class="status-badge {status_class}">{status_icon} {status_text}</span>
+                <span class="stat-item">📦 v{version}</span>
+                <span class="stat-item">🗄️ 数据库: {database}</span>
+            </div>
+        </div>
+
+        <!-- Access -->
+        <div class="section">
+            <h2>访问方式</h2>
+            <p style="margin-bottom:12px; color:#666; font-size:15px;">
+                请在微信中搜索「大气稳定度判定」小程序，或扫描下方二维码打开。
+            </p>
+            <p style="color:#999; font-size:13px;">
+                本页面为后端服务状态页，小程序功能请通过微信客户端访问。
+            </p>
+        </div>
+
     </div>
+
+    <div class="footer">
+        <p>大气稳定度判定系统 · v{version}</p>
+        <p style="margin-top:4px;">如有问题请联系客服</p>
+    </div>
+
 </body>
 </html>"#;
 
