Reapply "codex 试用，美化"

This reverts commit 9acd626e72.

admin/dashboard/templates/index.html

@@ -706,12 +706,27 @@
     .stats-card {
         margin-bottom: 15px;
         height: 120px;
+        position: relative;
+        overflow: hidden;
+        background: #f9fbff;
+        border: 1px solid #d6e6ff;
+        box-shadow: 0 6px 16px rgba(11, 29, 51, 0.06);
+    }
+    .stats-card::before {
+        content: "";
+        position: absolute;
+        left: 0;
+        right: 0;
+        top: 0;
+        height: 2px;
+        background: #5bd3ff;
+        box-shadow: 0 0 10px rgba(91, 211, 255, 0.5);
     }
     
     .chart-container {
         margin-bottom: 20px;
         padding: 10px;
-        background-color: #f9fbff;
+        background-color: #f7faff;
         border-radius: 4px;
         border: 1px solid #d6e6ff;
         box-shadow: 0 6px 16px rgba(11, 29, 51, 0.06);
@@ -787,5 +802,17 @@
         padding: 10px 0;
     }
 
+    /* 首页卡片统一冷色面板感 */
+    .content .el-card {
+        background: #f9fbff;
+        border: 1px solid #d6e6ff;
+        box-shadow: 0 6px 16px rgba(11, 29, 51, 0.06);
+    }
+    .content .el-card__header {
+        background: #f2f7ff;
+        border-bottom: 1px solid #d6e6ff;
+        color: #2a3b55;
+    }
+
 </style>
 {% endblock %}