#main a.newsletter-header__link:link, 
#main a.newsletter-header__link:visited
 {
    color:#111111;
    border-bottom-color:#111111;
}

.content {
    min-height: 80vh;
}

/* 全体のスタイル */
.accordion {
    width: 100%;
    margin-block: 1rem 3rem;
}

/* ヘッダー（ボタン）のスタイル */
.accordion-header{
    width: 100%;
    padding: 1rem;
    text-align: left;
    border: 1px solid #f0f0f0;
    background-color: transparent;
    outline: none;
    cursor: pointer;
    transition: .4s;
    font-weight: bold;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.accordion-header::before, 
.accordion-header::after{
    content: '';
    width: .8rem;
    height: 2px;
    position: absolute;
    right: 1rem;
    background-color: #333333;
    transition: transform .4s, opacity .4s;
}
.accordion-header::after{
    transform: rotate(-90deg);
}

.accordion-header.active::after{
    transform: rotate(0deg);
    opacity: 0;
}

.accordion-header.active{
    border-color: #333333;
} 
.accordion-header:hover {
    border-color: #1f8349;
}

/* コンテンツのスタイル */
.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, margin-bottom .3s;
}

.active + .accordion-content {
  margin-bottom: 2rem;
}


/*
 * Laboratory Files
 */

.newsletter-list{
    position: relative;
    min-height: 484px;
}

.newsletter-item{
    width: 48%;
}

.newsletter__pdf-link::after {
    content: '';
}

.newsletter-thumb{
    display: block;
    position: absolute;
    width: 48%;
    right: 0;
    top:0;
    overflow: hidden;
    border: 1px solid #aaaaaa;

    opacity: 0;
    z-index: -1;

    transition: opacity .4s;
}
.newsletter__pdf-link:hover + .newsletter-thumb{
    opacity: 1;
    z-index: 1;
}