.foo-menu {
  position: relative;
  z-index: 1000 !important;

}
.menu-active {
  .am-flexbox-dir-column .am-flexbox-item{
    min-width:auto!important;
  }
}
.menu-mask {
  content: ' ';
  position: absolute;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: #000;
  opacity: 0.4;
  z-index: 79;
}