.sidebar {
  position: relative;
  height: 100%;
}
@media (min-width: 992px) {
  .sidebar::before {
    content: "";
    position: absolute;
    top: 0;
    left: calc(-12.5% - 2.2rem);
    width: 0.1rem;
    height: 100%;
    background-color: rgba(216, 216, 216, 0.5);
  }
}
@media (min-width: 576px) and (max-width: 991px) {
  .sidebar__post-box {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
  }
}
.sidebar__post-item {
  color: #005285;
}
@media (min-width: 576px) and (max-width: 991px) {
  .sidebar__post-item {
    flex: 1 1 45%;
  }
}
.sidebar__post-item:not(:last-child) {
  margin-bottom: 1.5rem;
}
@media (min-width: 1600px) {
  .sidebar__post-item:not(:last-child) {
    margin-bottom: 2rem;
  }
}
.sidebar__post-image a {
  display: flex;
}
.sidebar__post-title {
  font-size: 1.6rem;
  line-height: 1.1;
}
@media (min-width: 1600px) {
  .sidebar__post-title {
    font-size: 1.8rem;
  }
}
.sidebar__post-date {
  font-size: 1.4rem;
}
@media (min-width: 1600px) {
  .sidebar__post-date {
    font-size: 1.6rem;
  }
}
.sidebar__promotion {
  margin-top: 3rem;
}
@media (min-width: 1600px) {
  .sidebar__promotion {
    margin-top: 5rem;
  }
}
@media (min-width: 992px) {
  .sidebar__promotion.sticky {
    position: fixed;
    top: 10rem;
    max-width: 23.6666666667rem;
    z-index: 0;
  }
}
@media (min-width: 1200px) {
  .sidebar__promotion.sticky {
    max-width: 28.6666666667rem;
  }
}
@media (min-width: 1440px) {
  .sidebar__promotion.sticky {
    max-width: 33.1111111111rem;
  }
}
@media (min-width: 1600px) {
  .sidebar__promotion.sticky {
    max-width: 39.7777777778rem;
  }
}
@media (min-width: 1920px) {
  .sidebar__promotion.sticky {
    max-width: 42.5555555556rem;
  }
}