.accordion-box {
  position: relative;
}
.accordion-box label {
  height: 100px;
  cursor: pointer;
  text-align: center;
  font-size: 12px;
  position: absolute;
  bottom: 0;
  width: 100%;

  background: -webkit-linear-gradient(
    top,
    rgba(255, 251, 213, 0) 0%,
    rgba(255, 251, 213, 0.95) 90%
  );
  background: -moz-linear-gradient(
    top,
    rgba(255, 251, 213, 0) 0%,
    rgba(255, 251, 213, 0.95) 90%
  );
  background: -o-linear-gradient(
    top,
    rgba(255, 251, 213, 0) 0%,
    rgba(255, 251, 213, 0.95) 90%
  );
  background: -ms-linear-gradient(
    top,
    rgba(255, 251, 213, 0) 0%,
    rgba(255, 251, 213, 0.95) 90%
  );
  background: linear-gradient(
    to bottom,
    rgba(255, 251, 213, 0) 0%,
    rgba(255, 251, 213, 0.95) 90%
  );
}
.accordion-box input:checked + label {
  background: none; /* 開いた時には背景グラデーションを消す */
}
.accordion-box label:after {
  content: "続きをよむ"; /* ラベルの文字 */
  letter-spacing: 0.05em;
  line-height: 2rem;
  position: absolute;
  bottom: 0px;
  left: 50%;
  -webkit-transform: translate(-50%, 0);
  transform: translate(-50%, 0);
  color: #ff7800;
  background-color: rgba(255, 251, 213, 0.5);
  width: 100%;
}
.accordion-box label:before {
  color: #fff;
  content: "+";
  font-weight: 700;
  position: absolute;
  bottom: 8px;
  left: 50%;
  -webkit-transform: translate(-60px, 0);
  transform: translate(-60px, 0);
  background-color: #ff7800;
  z-index: 1;
  -webkit-border-radius: 100%;
  -moz-border-radius: 100%;
  border-radius: 100%;
  width: 16px;
  height: 16px;
  line-height: 16px;
}
.accordion-box input {
  display: none !important;
}
.accordion-box .accordion-container {
  overflow: hidden;
  height: 160px; /* 開く前に見えている部分の高さ */
  -webkit-transition: all 0.1s;
  -moz-transition: all 0.1s;
  -ms-transition: all 0.1s;
  -o-transition: all 0.1s;
  transition: all 0.1s;
}

.accordion-box input:checked + label:after {
  content: "閉じる";
}
.accordion-box input:checked + label:before {
  color: #fff;
  content: "-";
}
.accordion-box input:checked ~ .accordion-container {
  height: auto;
  padding-bottom: 35px; /* 閉じるボタンのbottomからの位置 */
  -webkit-transition: all 0.1s;
  -moz-transition: all 0.1s;
  -ms-transition: all 0.1s;
  -o-transition: all 0.1s;
  transition: all 0.1s;
}