.s{
  text-decoration: none;
  position: relative;
}

.s-balloon {
  /*表示位置*/
  position: absolute;
  top: 0px;
  left: 280px;

/*  top: -30px;*/
/*  left: -15px;*/

  /*非表示*/
  display: none;
  opacity: 0;

  /*表示スタイル*/
  padding: 5px;
  border-radius: 5px;
  font-size: 80%;
  font-weight: normal;
  color: white;
  background-color: gray;
  /*影*/
  box-shadow: 0px 1px 2px 0px rgba(0, 0, 0, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    inset 1px 0 0 rgba(255, 255, 255, 0.3),
    inset -1px 0 0 rgba(255, 255, 255, 0.3),
    inset 0 -1px 0 rgba(255, 255, 255, 0.2);

  /*アニメーションを指定します*/
/*  animation-duration: 0.3s;
  animation-name: show-balloon;*/
}

.s:hover .s-balloon {
 
  /*表示*/
  display: inline-block;
  opacity: 1;
/*  top: -40px;*/
}

/*.s-balloon::before {
  content: "";
  position: absolute;
  top: 97%;
  left: 20px;
  border: 6px solid transparent;
  border-top: 6px solid blue;
}*/

/*@keyframes show-balloon {
  0% {
    display: none;
    opacity: 0;
    top: -30px;
  }
  1% {
    display: inline-block;
    opacity: 0;
    top: -30px;
  }
  100% {
    display: inline-block;
    opacity: 1;
    top: -40px;
  }
}*/