.cp_box2 {
  width: auto;
  margin: 30px auto;
}
.cp_box2 input {
  display: none;
}
/*続きを読むボタン*/
.cp_box2 label {
  font-weight: bold;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 80%;
  margin: auto;
  padding: 0.3em 1em;
  cursor: pointer;
  transition: all 0.3s;
  text-align: center;
  color: #333333;
  border: 2px solid #333333;
  border-radius: 3px;
}
/*＋マーク*/
.cp_box2 label::after {
  position: absolute;
  content: '';
  right: 16px;
  width: 16px;
  height: 16px;
  background: #333333;
  clip-path: polygon(0 40%, 40% 40%, 40% 0, 60% 0, 60% 40%, 100% 40%, 100% 60%, 60% 60%, 60% 100%, 40% 100%, 40% 60%, 0 60%);
}
.cp_box2 label:hover::after {
  color: #ffffff;
}
/*hover*/
.cp_box2 label:hover {
  transition: all 0.3s;
  color: #ffffff;
  background: #333333;
}
.cp_box2 label:hover::after {
  background: #ffffff;
}
/*-マーク*/
.cp_box2 input:checked ~ label::after {
  background: #333333;
  clip-path: polygon(0 40%, 100% 40%, 100% 60%, 0 60%);
}
/*hover*/
.cp_box2 input:checked ~ label:hover::after {
  background: #ffffff;
}
.cp_box2 div.cp_container2 {
  position: relative;
  z-index: 10;
  overflow: hidden;
  height: 0;
  margin-top: -1px;
}
.cp_box2 input:checked ~ div.cp_container2 {
  transition: height 0.5s ease-in-out;
}
/* 高さを設定 */
.cp_box2 input:checked ~ div.cp_container2 {
  height: auto;
}