优化行情首页卡片样式

pages/marketSituation/marketOverview.vue

@@ -642,8 +642,7 @@ watch(headerHeight, (newHeight) => {
   margin: 0;
   box-sizing: border-box;
   width: 100%;
-  padding: 30rpx 20rpx;
-  gap: 20rpx;
+  padding: 30rpx 0;
 }
 
 .card_item {
@@ -657,7 +656,7 @@ watch(headerHeight, (newHeight) => {
 @media (max-width: 600rpx) {
   .cards_grid {
     grid-template-columns: repeat(2, 1fr);
-    padding: 30rpx 20rpx;
+    padding: 30rpx 0;
   }
 }
 
@@ -665,7 +664,7 @@ watch(headerHeight, (newHeight) => {
 @media (max-width: 400rpx) {
   .cards_grid {
     grid-template-columns: 1fr;
-    padding: 30rpx 20rpx;
+    padding: 30rpx 0;
   }
 }