yoho tip zindex

@@ -9,6 +9,10 @@ $basicBtnC:#eb0313;
     overflow: hidden;
     background-color: #f0f0f0;
 
+    .yoho-tip {
+        z-index: 4;
+    }
+
     .page-block {
         background-color: #fff;
         box-sizing: border-box;