.accordion-content {
    max-height: 0;
    transition: 0.4s ease;
    transform: scaleY(0);
    transform-origin: top;
}

.accordion-content.open {
  transform: scaleY(1)
}

.accordion-btn {
  display: block;
    width: auto;
    background: unset;
    border: unset;
    cursor: pointer;
    outline: none;
    transition: background 0.3s;
}

.accordion-btn::before{
  content: "詳しく見てみる";
}

.accordion-btn.active::before{
  content: "閉じる";
}