diff --git a/src/views/caseDetail.vue b/src/views/caseDetail.vue
index d143387..e223fbe 100644
--- a/src/views/caseDetail.vue
+++ b/src/views/caseDetail.vue
@@ -306,6 +306,8 @@ const onChange=(newIndex)=>{
 
 <style lang='scss' scoped>
 .casemain.on{
+   position: relative;
+   z-index:-1;
   opacity: 1;
 }
 .main {