#special-block {
  background: #ffffff url(../images/aaa.png) no-repeat center;
  display: inline-block;
  width: 51px;
  height: 50px;
  position: relative;
}
#special-block:before {
  content: 'Версия для слабовидящих';
  display: none;
  position:absolute;
  background-color: #dee4f3;
  top:50px;
  color:#051945;
  font-size:14px;
  padding:10px;
  right:0;
  z-index:9999;
  border: solid 1px #d2d7e2;
  text-align: center;
}
#special-block:hover {
  background-color: #dee4f3;
}
#special-block:hover:before {
  display: block;
}

#special-normal-block {
  width: 929px;
  display: block;
  margin: 0 auto;
  position: fixed;
  top: 40px;
  z-index: 1;
  text-align: center;
  font-size: 1.2em;
  padding:5px 0;
  text-decoration: underline;
  color:#000;
  margin-left: 47px;
}