update css

index.md

@@ -10,12 +10,11 @@ order: 1
     .index-box-container {
         display: flex;
         flex-wrap: wrap;
+        justify-content: space-around;
     }
 
     .index-box {
         width: 38%;
-        margin-right: 4%;
-
         padding: 10px 20px 0px 20px;
 
         border: solid 2px #efefef;