diff --git a/pages-game/game/minesweeper/index.vue b/pages-game/game/minesweeper/index.vue
index 6963962..70e6479 100644
--- a/pages-game/game/minesweeper/index.vue
+++ b/pages-game/game/minesweeper/index.vue
@@ -46,16 +46,24 @@
       <view 
         class="btn-primary" 
         :class="{ disabled: ticketCount <= 0 || entering }"
-        @tap="enterGame"
+        @tap="enterGame('minesweeper')"
       >
         <text class="enter-btn-text">{{ entering ? '正在进入...' : (ticketCount > 0 ? '立即开局' : '资格不足') }}</text>
       </view>
+
+      <view 
+        class="btn-free" 
+        :class="{ disabled: entering }"
+        @tap="enterGame('minesweeper_free')"
+      >
+        <text class="free-btn-text">🍭 免费试玩 (正式场获胜有奖)</text>
+      </view>
+
       <view 
         class="btn-secondary" 
-        style="margin-top: 24rpx; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: 55rpx; height: 110rpx; display: flex; align-items: center; justify-content: center;"
         @tap="goRoomList"
       >
-        <text style="color: #94a3b8; font-size: 32rpx; font-weight: 600;">📡 对战列表 / 围观</text>
+        <text class="secondary-btn-text">📡 对战列表 / 围观</text>
       </view>
     </view>
   </view>
@@ -98,8 +106,10 @@ export default {
         this.loading = false
       }
     },
-    async enterGame() {
-      if (this.ticketCount <= 0 || this.entering) return
+    async enterGame(code) {
+      const targetCode = code || this.gameCode
+      if (targetCode !== 'minesweeper_free' && this.ticketCount <= 0) return
+      if (this.entering) return
       
       this.entering = true
       try {
@@ -107,7 +117,7 @@ export default {
           url: '/api/app/games/enter',
           method: 'POST',
           data: {
-            game_code: this.gameCode
+            game_code: targetCode
           }
         })
         
@@ -310,10 +320,57 @@ export default {
   &.disabled {
     background: $text-disabled;
     box-shadow: none;
+    opacity: 0.6;
     pointer-events: none;
   }
 }
 
+.btn-free {
+  margin-top: 24rpx;
+  height: 110rpx;
+  width: 100%;
+  border-radius: 55rpx;
+  background: rgba($brand-primary, 0.15);
+  border: 1px solid rgba($brand-primary, 0.3);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  transition: all 0.2s;
+
+  &:active {
+    transform: scale(0.98);
+    background: rgba($brand-primary, 0.25);
+  }
+
+  &.disabled {
+    opacity: 0.5;
+    pointer-events: none;
+  }
+}
+
+.free-btn-text {
+  color: $brand-primary;
+  font-size: 32rpx;
+  font-weight: 700;
+}
+
+.btn-secondary {
+  margin-top: 24rpx;
+  background: rgba(255,255,255,0.05);
+  border: 1px solid rgba(255,255,255,0.1);
+  border-radius: 55rpx;
+  height: 110rpx;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.secondary-btn-text {
+  color: #94a3b8;
+  font-size: 32rpx;
+  font-weight: 600;
+}
+
 .enter-btn-text {
   font-size: 36rpx;
   letter-spacing: 2rpx;
diff --git a/utils/nakamaManager.js b/utils/nakamaManager.js
index b6f2456..9fd7484 100644
--- a/utils/nakamaManager.js
+++ b/utils/nakamaManager.js
@@ -118,7 +118,12 @@ class NakamaManager {
                         // 这里不自动连接，由业务层在适当时机调用 connect()
                         resolve(this.session);
                     } else {
-                        reject(new Error('Authentication failed: ' + JSON.stringify(res.data)));
+                        // 检查是否收到 HTML 响应（通常意味着跳转或安全拦截）
+                        if (typeof res.data === 'string' && (res.data.trim().toLowerCase().startsWith('<!doctype') || res.data.trim().toLowerCase().startsWith('<html'))) {
+                            reject(new Error('游戏服务器地址配置错误或被拦截 (收到 HTML 响应)。请在后台管理检查游戏服务器地址设置。'));
+                        } else {
+                            reject(new Error('Authentication failed: ' + JSON.stringify(res.data)));
+                        }
                     }
                 },
                 fail: (err) => {
diff --git a/utils/request.js b/utils/request.js
index e726740..0dce64b 100644
--- a/utils/request.js
+++ b/utils/request.js
@@ -11,10 +11,10 @@ function handleAuthExpired() {
     content: '账号登录已过期，请重新登录',
     showCancel: true,
     success: (res) => {
-		if (res.cancel) {
-					console.log('用户点击取消');
-					return
-				}
+      if (res.cancel) {
+        console.log('用户点击取消');
+        return
+      }
       authModalShown = false
       uni.navigateTo({ url: '/pages/login/index' })
     }
@@ -85,17 +85,26 @@ export function redeemProductByPoints(user_id, product_id, quantity) {
   })
 }
 
+let cachedSystemInfo = null
+
+function getSystemInfo() {
+  if (cachedSystemInfo) return cachedSystemInfo
+  try {
+    cachedSystemInfo = uni.getSystemInfoSync()
+    return cachedSystemInfo
+  } catch (_) {
+    return {}
+  }
+}
+
 function getLanguage() {
-  try { return (uni.getSystemInfoSync().language || 'zh-CN') } catch (_) { return 'zh-CN' }
+  return getSystemInfo().language || 'zh-CN'
 }
 
 function getPlatform() {
-  try {
-    // 简单判断当前运行平台
-    if (typeof wx !== 'undefined') return 'mp-weixin'
-    const info = uni.getSystemInfoSync()
-    return info.platform || 'unknown'
-  } catch (_) { return 'unknown' }
+  // 简单判断当前运行平台
+  if (typeof wx !== 'undefined') return 'mp-weixin'
+  return getSystemInfo().platform || 'unknown'
 }
 
 function getDeviceId() {
@@ -110,7 +119,7 @@ function getDeviceId() {
 }
 
 function buildDefaultHeaders() {
-  const info = uni.getSystemInfoSync()
+  const info = getSystemInfo()
   const lang = info.language || 'zh-CN'
   const platform = info.platform || 'unknown'
   const brand = info.brand || ''
@@ -120,7 +129,7 @@ function buildDefaultHeaders() {
   const screen = `${info.screenWidth}x${info.screenHeight}`
   const pixelRatio = info.pixelRatio || 1
   const windowSize = `${info.windowWidth}x${info.windowHeight}`
-  return {
+  const headers = {
     'Accept': 'application/json',
     'content-type': 'application/json',
     'X-Requested-With': 'XMLHttpRequest',
@@ -135,7 +144,12 @@ function buildDefaultHeaders() {
     'X-Screen': screen,
     'X-Pixel-Ratio': pixelRatio,
     'X-Window': windowSize,
-    'Cache-Control': 'no-cache',
-    'User-Agent': `UniApp/${platform} (${brand} ${model}; ${osName} ${osVersion}) MiniProgram`
+    'Cache-Control': 'no-cache'
   }
+  // 小程序环境禁止设置 User-Agent
+  // #ifndef MP
+  headers['User-Agent'] = `UniApp/${platform} (${brand} ${model}; ${osName} ${osVersion})`
+  // #endif
+
+  return headers
 }