<div class="contents">text</div>
<div class="cp_snslink10">
  <div class="cp_link_list">
  <input type="checkbox" id="cp_toggle" />
  <label for="cp_toggle" class="share"></label>
  <ul class="cp_link">
  <li class="twitter"><a href="#" title="Twitter"></a></li>
  <li class="facebook"><a href="#" title="Facebook"></a></li>
  <li class="instagram"><a href="#" title="Instagram"></a></li>
  </ul>
  </div>
</div>

body {
/*設置する親要素ページ全体ならbodyなど*/
  position: relative;
  height: 100vh;
  margin: 0;
  padding: 0;
}
.contents {
/*サンプルはfixedの確認のためにheight指定しています。*/
  height: 2000px;
}
.cp_snslink10 {
  position: fixed;
  top: 4%;
  left: 1%;
  display: block;
  margin: 0;
  transform: translateY(-50%);
  width: 40%;
}
.cp_snslink10 .cp_link_list{
  position: relative;
  perspective: 1000px;
}
.cp_snslink10 .cp_link_list input{
  display: none;
}
/*シェアボタン*/
.cp_snslink10 .cp_link_list label.share {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 50px;
  height: 50px;
  background: #4DB6AC;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s;
}
.cp_snslink10 .cp_link_list label.share::before{
  position: absolute;
  content: '';
  background-image: url(https://copypet.jp/demo/sns/share_icon_white.svg);
  background-size: contain;
  background-repeat: no-repeat;
  width: 25px;
  height: 25px;
}
/*各種SNSリンク*/
.cp_snslink10 .cp_link_list .cp_link li {
  position: absolute;
  top: 0;/*最初の位置*/
  left: 0;
  opacity: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  list-style: none;
  margin: 0 0 10px 0;
  padding: 0;
  width: 50px;
  height: 50px;
  background: #F48FB1;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.5s;
  z-index: -1;
}
/*SNS各種ロゴ*/
.cp_snslink10 .cp_link .facebook::before,
.cp_snslink10 .cp_link .twitter::before,
.cp_snslink10 .cp_link .instagram::before {
  position: absolute;
  content: '';
  background-size: contain;
  background-repeat: no-repeat;
  width: 25px;
  height: 25px;
}
/*facebook*/
.cp_snslink10 .cp_link .facebook::before {
  background-image: url(facebook_logo_secondary.svg);
}
/*twitter*/
.cp_snslink10 .cp_link .twitter::before {
  background-image: url(x-logo.svg);
}
/*instagram*/
.cp_snslink10 .cp_link .instagram::before {
  background-image: url(instagram_glyph_white.svg);
}
/* hover時の動きの設定 */
.cp_snslink10 .cp_link_list .cp_link li a {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  transition: all 0.3s;
}
.cp_snslink10 .cp_link_list .cp_link li:hover a {
  background: #42A5F5;
}
/* シェアボタンクリック時の動きの設定 */
.cp_snslink10 .cp_link_list input:checked ~ label {
  background: #EC407A;
}
.cp_snslink10 .cp_link_list input:checked ~ .cp_link li{
  opacity: 1;
  transform: translateY(0) rotate(360deg);
  transition: all 0.3s;
}
.cp_snslink10 .cp_link_list input:checked ~ .cp_link li.twitter{
  left: 60px;
  transition-delay: 0;
  z-index: 4;
}
.cp_snslink10 .cp_link_list input:checked ~ .cp_link li.facebook{
  left: 120px;
  transition-delay: 0.3s;
  z-index: 3;
}
.cp_snslink10 .cp_link_list input:checked ~ .cp_link li.instagram{
  left: 180px;
  transition-delay: .6s;
  z-index: 2;
}