修复某些不支持grid的机型显示错误

pages/index/index.wxss

@@ -161,19 +161,24 @@ page {
   width: 100%;
   height: 100%;
   background: #fff;
-  display: grid;
+  display: inline-block;
-  grid-template-columns: repeat(4, 1fr);
   align-content: center;
-  grid-row-gap: 10%;
   box-sizing: border-box;
-  padding: 0 20rpx;
+  /* padding: 0 20rpx; */
+  padding-bottom: 20rpx;
 }
 
 .sudoku .item {
-  display: flex;
+  /* display: flex;
   flex-direction: column;
   align-items: center;
+  justify-content: center; */
+  display: inline-flex;
+  flex-direction: column;
   justify-content: center;
+  align-items: center;
+  width: 25%;
+  margin-top: 20rpx;
 }
 
 .sudoku .item image {