#social {
  position: absolute;
  left: 0px;
  top: 260px;
  width: 60px;
  height: 320px;
  z-index: 999;
}
#social .social_item {
  display: inline-block;
}
#social .social_item:hover {
  background-repeat: no-repeat;
  background-position: 0 top;
  transition-duration: 0.6s;
  opacity: 1;
}
#social .social_item a {
  width: 40px;
  height: 40px;
  transition-duration: 0.6s;
  opacity: 1;
  display: block;
  text-decoration: none;
  background-color: #ddd;
  color: #666;
  font-size: 16px;
  text-align: center;
  margin: 2px 0;
  line-height: 40px;
}
#social .social_item a:hover {
  background-repeat: no-repeat;
  background-position: 0 top;
  transition-duration: 0.3s;
  opacity: 1;
  color: #354bcc;
}
@media (max-width: 1090px) {
  #social {
    display: none;
  }
}