edit

src/Lib/Input.php

@@ -1022,7 +1022,7 @@ class Input
                 $child_param['name'] = 'child-' . $k;
                 $child_param['option'] = $v;
 
-                $html .= self::select($child_param, $child . '_child ' . $child . '_child_' . $k . '" parent="' . $k . '" style="display:none;margin-top: -35px;margin-left: 47%;"', $hidden);
+                $html .= self::select($child_param, $child . '_child ' . $child . '_child_' . $k . '" parent="' . $k . '" style="display:none;margin-top: -38px;margin-left: 47%;"', $hidden);
             }
         }