diff --git a/web/src/components/MatchGround.vue b/web/src/components/MatchGround.vue
index 2dbfde6..f4a9ab0 100644
--- a/web/src/components/MatchGround.vue
+++ b/web/src/components/MatchGround.vue
@@ -104,7 +104,7 @@ div.user-select-bot {
     width: 60vw;
     height: 70vh;
     /* 背景色: rgba 加上透明通道 */
-    background: rgba(70, 70, 70, 0.5);
+    /* background: rgba(70, 70, 70, 0.5); */
     /* 距上边距40px,左右居中 */
     margin: 40px auto;
 }