diff --git a/css/details.css b/css/details.css
index 81c4fbd..fe5df31 100644
--- a/css/details.css
+++ b/css/details.css
@@ -72,12 +72,13 @@
   height: 8px;
   position: absolute;
   top: 0;
+  z-index: -1;
 }
 .boxbox .admission-box .triangle.triangle-left {
   left: -8px;
 }
 .boxbox .admission-box .triangle.triangle-right {
-  right: -8px;
+  right: -10px;
 }
 .boxbox .admission-box .bj {
   width: 566px;
diff --git a/css/details.less b/css/details.less
index b6de97d..febe4e5 100644
--- a/css/details.less
+++ b/css/details.less
@@ -87,8 +87,9 @@
                 left: -8px;
             }
             &.triangle-right {
-                right: -8px;
+                right: -10px;
             }
+            z-index: -1;
         }
 
         .bj {