.bottom_ads{display: none;}
.product-nav .nav_download .download-mac{
  display: none;
}
.free_btn{
  min-width: 165px;
  padding: 0 12px;
  box-sizing: border-box;
  height: 48px;
  background: #6F3FC5;
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #fff;
}
.free_btn::before{
  clear: both;
  content: "";
  background: url(/img/article-template/play-icon.svg);
  width: 24px;
  height: 24px;
  margin-right: 6px;
}
.product-nav.online{
  position: fixed;
  top: unset;
  bottom: 0px;
  width: 100%;
}
.feedback_mask{display: none;background: rgba(0,0,0,.19);position: fixed;width: 100%;height: 1000%;top: 0px;left: 0px;z-index: 9999;}
.feedback_mask.active{display: block;}
.feedback{display: block;}