调整智能AI助手新的UI界面

sikey-hmd-business/sikey-hmd-business-biz/src/main/resources/templates/index.html

@@ -13,7 +13,7 @@
 
         body {
             font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
-            background: url('/images/ai-background.png') no-repeat center center;
+            background: url('/images/ai-background.png') no-repeat center;
             margin: 0;
             line-height: 1.6;
             position: relative; /* 为绝对定位子元素提供参照 */