.wf-product {
    max-width: 1440px;
    width: 100%;
    margin: 0 auto;
}
.wfbtn {
  position: relative;
  cursor: pointer;
  overflow: hidden; /* Скрываем выходящий за края блик */
  transition: all 0.3s;
}

/* Создаем блик через псевдоэлемент */
.wfbtn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%; /* Начинаем за кнопкой */
  width: 50%;
  height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255,255,255,0.4), transparent);
  transform: skewX(-25deg);
  transition: 0.5s;
}

/* Анимация при наведении */
.wfbtn:hover::before {
  left: 150%; /* Двигаем через кнопку */
}

.wf-header.fixed {
	position: fixed;
	top: 0;
    left: 0;
    right: 0;
}

#backtotop {
  display: inline-block;
  background-color: #d7d7d7;
  width: 50px;
  height: 50px;
  text-align: center;
  border-radius: 3px;
  position: fixed;
  bottom: 30px;
  right: 30px;
  transition: background-color .3s, 
    opacity .5s, visibility .5s;
  opacity: 0;
  visibility: hidden;
  z-index: 1000;
}
/*#backtotop::after {
  content: "\f077";
  font-family: FontAwesome;
  font-weight: normal;
  font-style: normal;
  font-size: 2em;
  line-height: 50px;
  color: #fff;
}*/
#backtotop:hover {
  cursor: pointer;
  background-color: #333;
}
#backtotop:active {
  background-color: #333;
}
#backtotop.show {
  opacity: 1;
  visibility: visible;
}