refactor:删除css空规则

src/views/BattleRanking.vue

@@ -1922,9 +1922,7 @@ onUnmounted(() => {
   gap: 15px;
 }
 
-.total-score-content {
+/* 移除空的total-score-content规则集以避免SCSS警告 */
-  
-}
 
 .total-score-item {
   display: flex;