/* 事例記事用サイドバー */
.l-sidebar--case {
  position: relative;
    padding: 2em 0;
}
@media (max-width: 768px) {
  .l-sidebar--case {
    display: none;
  }
}

.case-sidebar__toc-wrapper {
  position: sticky;
  top: 100px;
  background: #fff;
  border: 1px solid #e5e5e5;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 20px;
}

/* 目次 */
.case-sidebar__toc {
  padding: 20px;
  border-bottom: 1px solid #e5e5e5;
}

.case-sidebar__toc-title {
  font-size: 16px;
  font-weight: bold;
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid #1e9b50;
}

.case-sidebar__toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.case-sidebar__toc-item {
  margin-bottom: 8px;
}

.case-sidebar__toc-link {
  display: block;
  padding: 8px 12px;
  color: #333;
  text-decoration: none;
  font-size: 14px;
  border-left: 3px solid transparent;
  transition: all 0.3s ease;
}

.case-sidebar__toc-link:hover {
  background: #f5f5f5;
  border-left-color: #1e9b50;
  color: #1e9b50;
}

.case-sidebar__toc-link.-active {
  background: #e9ffee;
  border-left-color: #1e9b50;
  color: #1e9b50;
  font-weight: bold;
}

/* CTA */
.case-sidebar__cta {
  padding: 20px;
}

.case-sidebar__button {
  display: block;
  width: 100%;
  padding: 16px 24px;
  background: #1e9b50;
  color: #fff;
  text-align: center;
  text-decoration: none;
  font-weight: bold;
  font-size: 16px;
  border-radius: 4px;
  transition: all 0.3s ease;
}

.case-sidebar__button:hover {
  background: #167a3f;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(30, 155, 80, 0.3);
  color: #fff;
}

.case-sidebar__link {
  margin-top: 12px;
  text-align: center;
}

.case-sidebar__link a {
  color: #1e9b50;
  text-decoration: none;
  font-size: 14px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}

.case-sidebar__link a:hover {
  border-bottom-color: #1e9b50;
}

/* レスポンシブ */
@media (max-width: 768px) {
  .case-sidebar__toc-wrapper {
    position: static;
    margin-bottom: 20px;
  }
}
<div class="case-sidebar__link">
    <a href="/download">まずは無料で資料ダウンロード</a>
</div>
<a href="/contact" class="case-sidebar__button">お問い合わせ</a>
<style>
	.case-sidebar__link{
		    font-weight: bold;
    text-align: center;
    padding: 14px;
    border-radius: 3px;
    background: #fcd44a;
    color: #333;
    text-decoration: none;
    margin-bottom: 5px;
	}
	.case-sidebar__link a{
            color: #333;
            text-decoration: none;
        }
	.case-sidebar__button{
		text-align: center;
		text-decoration: underline;
        background: none;
        padding: 0;
        color: #1d8de3;
        font-size: 13px;
	}
</style>