.main_content {
  width: 72rem;
}

article {
  background: var(--color-gray-l);
  padding: 3.2rem;
  box-sizing: border-box;
  margin-bottom: 4.8rem;
}
article h2 {
  border-bottom: 1px solid var(--color-bk);
  margin-bottom: 2.4rem;
  font-size: clamp(3.2rem, 1rem + 4vw, 4rem);
}
article p:not(:last-child) {
  margin-bottom: 1.6rem;
}
article ul,
article ol {
  padding: clamp(2.4rem, 3vw, 3.2rem);
  background: var(--color-w);
  margin: 2.4rem 0;
}
article ul li,
article ol li {
  border-top: 1px dashed var(--color-gray);
  border-bottom: 1px dashed var(--color-gray);
  padding: 0.4rem 0.8rem 0.4rem 2.4rem;
  margin-top: -1px;
  text-indent: -0.8em;
}
article ul li::before,
article ol li::before {
  content: "";
  display: inline-block;
  height: 0.8rem;
  width: 0.8rem;
  background: var(--color-primary-light);
  border-radius: 50%;
  margin-right: 0.4rem;
  margin-bottom: 0.2rem;
}

.post_arw ul {
  display: flex;
  justify-content: center;
  gap: 4rem;
}
@media (max-width: 520px) {
  .post_arw ul {
    flex-direction: column;
    align-items: center;
    gap: 1.6rem;
  }
}
.post_arw .btn_link a.prev-link.b::before, .post_arw .btn_link a.next-link.b::before {
  border: 1px solid var(--color-primary);
  background: var(--color-w);
}
.post_arw .btn_link a.prev-link.b::after, .post_arw .btn_link a.next-link.b::after {
  border-color: var(--color-primary);
}
.post_arw .btn_link a.prev-link.b::after {
  transform: rotate(135deg);
  left: 0.3em;
}