工单 #8：优化界面布局，将按钮和难度选择移至画布下方

style.css

@@ -48,8 +48,13 @@ main {
     text-align: center;
 }
 
-.game-controls {
+.game-info {
     margin-bottom: 20px;
+}
+
+.game-controls {
+    margin-top: 20px;
+    margin-bottom: 15px;
     display: flex;
     justify-content: center;
     gap: 10px;
@@ -122,11 +127,7 @@ main {
 }
 
 .game-info {
-    text-align: left;
-    background: #f8f9fa;
-    padding: 15px;
-    border-radius: 8px;
-    border-left: 4px solid #764ba2;
+    margin-top: 20px;
 }
 
 .game-info h3 {
@@ -137,6 +138,8 @@ main {
 .game-info ul {
     list-style: none;
     padding-left: 0;
+    display: inline-block;
+    text-align: left;
 }
 
 .game-info li {