微调样式

src/pages/common/RtcCallModal/RtcLayout.module.scss

@@ -19,7 +19,7 @@
   display: block;
   position: fixed;
   z-index: 999;
-  bottom: 55px;
+  bottom: 0px;
   left: 0;
   width: 60px;
   height: 60px;