<div class="cp_ipselect07">
  <input type="radio" name="option">
  <i class="toggle cp_sl07_arrowdown"></i>
  <i class="toggle cp_sl07_arrowup"></i>
  <span class="cp_sl07_selectlabel">Choose</span>
  <label class="option">
  <input type="radio" name="option">
  <span class="cp_sl07_title">cat</span>
  </label>
  <label class="option">
  <input type="radio" name="option">
  <span class="cp_sl07_title">dog</span>
  </label>
  <label class="option">
  <input type="radio" name="option">
  <span class="cp_sl07_title">rabbit</span>
  </label>
  <label class="option">
  <input type="radio" name="option">
  <span class="cp_sl07_title">squirrel</span>
  </label>
</div>

.cp_ipselect07 {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  margin: 2em auto;
}
/*ラジオボタンの制御*/
.cp_ipselect07 > input {
  position: absolute;
  z-index: 1;
  top: 0;
  left: 0;
  display: block;
  width: 100%;
  height: 56px;
  cursor: pointer;
  opacity: 0;
}
.cp_ipselect07 label.option input {
  display: none;
}
.cp_ipselect07 > i.toggle {
  position: absolute;
  z-index: 4;
  top: 1.6em;
  right: 1.5em;
  color: #ffffff;
}
/*プルダウンの三角を設定*/
.cp_ipselect07 .cp_sl07_arrowup:before {
  position: absolute;
  top: 0;
  right: 0;
  content: '';
  width: 16px;
  height: 8px;
  background: #ffffff;
  clip-path: polygon(0 100%, 100% 100%, 50% 0);
  transition: all 250ms cubic-bezier(.4,.25,.3,1);
}
.cp_ipselect07 .cp_sl07_arrowdown:before {
  position: absolute;
  top: 0;
  right: 0;
  content: '';
  width: 16px;
  height: 8px;
  background: #ffffff;
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  transition: all 250ms cubic-bezier(.4,.25,.3,1);
}

.cp_ipselect07 .cp_sl07_title,
.cp_ipselect07 .cp_sl07_selectlabel {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  cursor: pointer;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  background: #da3c41;
}
/*ラジオボタンにチェックが入っていない時の処理*/
.cp_ipselect07 > input:not(:checked) {
  z-index: 4;
}
.cp_ipselect07 > input:not(:checked) ~ label.option > span.cp_sl07_title {
  display: none;
}
.cp_ipselect07 > input:not(:checked) ~ i.toggle.cp_sl07_arrowup {
  display: none;
}
.cp_ipselect07 > input:not(:checked) ~ i.toggle.cp_sl07_arrowdown {
  display: block;
}
/*ラジオボタンにチェックが入った時の処理*/
.cp_ipselect07 > input:checked ~ i.toggle.cp_sl07_arrowdown {
  display: none;
}
.cp_ipselect07 > input:checked ~ i.toggle.cp_sl07_arrowup {
  display: block;
}
.cp_ipselect07 > input:checked div.options label.option .cp_sl07_title {
  display: none !important;
}
.cp_ipselect07 label.option input:checked ~ span.cp_sl07_title {
  position: absolute;
  z-index: 3;
  top: 0;
  display: flex;
  align-items: center;
  width: 100%;
  height: 56px;
  color: inherit;
  border-top: 0;
  background: #1b2538;
}
/*セレクト内テキストの設定*/
.cp_ipselect07 > span.cp_sl07_selectlabel,
.cp_ipselect07 label.option {
  display: flex;
  align-items: center;
  width: 100%;
  height: 56px;
  color: #ffffff;
  border-top: 0;
  transition: all 1s ease-out;
}
.cp_ipselect07 > span.cp_sl07_selectlabel {
  padding-left: 1em;
}
.cp_ipselect07 label.option span.cp_sl07_title {
  position: relative;
  display: flex;
  align-items: center;
  padding-left: 2em;
  height: 56px;
  z-index: 2;
  transition: 0.3s ease-out;
}
.cp_ipselect07 label.option span.cp_sl07_title:hover {
  color: #ffffff;
  background: #1b2538;
}