diff --git a/2020-Silk-Reroad/yousan.css b/2020-Silk-Reroad/yousan.css
index 7ee8e36..045d32d 100644
--- a/2020-Silk-Reroad/yousan.css
+++ b/2020-Silk-Reroad/yousan.css
@@ -26,34 +26,39 @@
 }
 
 .center {
-  position: absolute;
-  bottom: 0%;
-  left: 50%;
-  transform: translateX(-50%);
-  -webkit-transform: translateX(-50%);
-  -ms-transform: translateX(-50%);
-  width: 800px;
-  height: 800px;
+ position: absolute;
+    bottom: 0%;
+    left: 50%;
+    transform: translateX(-50%);
+    -webkit-transform: translateX(-50%);
+    -ms-transform: translateX(-50%);
+    width: 800px;
+    height: 800px;
+    z-index: 1;
 }
 
 .inner {
-  text-align: center;
-  width: 80%;
-  padding: 10px;
-  border: 1px solid black;
-  background-color: rgba(255, 210, 111, 0.5);
-  margin: 0 auto;
-  position: absolute;
-  bottom: 5%;
-  left: 50%;
-  transform: translateX(-50%);
-  -webkit-transform: translateX(-50%);
-  -ms-transform: translateX(-50%);
-}
+ text-align: center;
+    width: 80%;
+    padding: 10px;
+    border: 1px solid black;
+    background-color: rgba(255, 210, 111, 0.5);
+    margin: 0 auto;
+    position: absolute;
+    bottom: 20%;
+    left: 50%;
+    transform: translateX(-50%);
+    -webkit-transform: translateX(-50%);
+    -ms-transform: translateX(-50%);}
 
 .box {
-    width:1000px; height:1000px;margin:5px; padding:10px;
-    border:1px solid black;background-color:lightgray;}
+   width: 100%;
+    height: 700px;
+    margin-top: 100px;
+    padding: 10px;
+    border: 1px solid black;
+    background-color: lightgray;
+    z-index: 0;}