.l-sitemap{
  max-width: 120rem;
  margin-inline: auto;
}
h3::after{
  border:none;
  width: auto;
}
.o-m1 {
font-family: "Zen Maru Gothic", "Noto Sans JP", "游ゴシック Medium", "Yu Gothic Medium", 游ゴシック, "Yu Gothic", 游ゴシック体, YuGothic, "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", メイリオ, Meiryo, Osaka, sans-serif;
display: grid;
grid-template-columns: repeat(4, 1fr);
gap: 15px 35px;
padding: 70px 0 0;
}
@media only screen and (max-width: 736px) {
.o-m1 {
  gap: 5px 25px;
  grid-template-columns: repeat(2, 1fr);
  padding: 40px 8vw 0;
}
}
.o-m1__item {
position: relative;
border-top: 1px solid #cccccc;
}
.o-m1__link {
font-weight: bold;
display: block;
padding: 15px 23% 10px 0;
line-height: 1.5;
width: 100%;
height: 100%;
}
@media only screen and (max-width: 736px) {
.o-m1__link {
  font-size: 13px;
  padding: 20px 10% 10px 0;
}
}
.o-m1__link::after {
content: "";
width: 5px;
height: 5px;
border-top: solid 1px #415457;
border-right: solid 1px #415457;
position: absolute;
position: absolute;
top: 50%;
right: 0;
transform: translateY(-50%) rotate(135deg);
}

.sitemap-list a{
  text-decoration: underline;
}
.sitemap-heading{
  background: #258386;
  padding: 0.3em 1em;
  line-height: 1.4;
  font-size: 28px;
  color: #fff;
  font-weight: 500;
  @media screen and (max-width: 768px) {
    font-size: 20px;
  }
}
.sitemap-heading a{
  color: #fff;
}
.p-sitemap_item{
  display: inline-block;
  width: 48%;
  margin-right: 1.5%;
  @media screen and (max-width: 768px) {
    width: 100%;
  }
}
#o-contents05 .p-sitemap_item{
  margin-right: 0;
}
.p-sitemap_item a{
  text-decoration: underline;
}
.sitemap-item a{
  text-decoration: underline;
}
.p-sitemap_lead{
  padding-bottom: 10px;
  border-bottom: 1px solid #258386;
  font-size: 20px;
  @media screen and (max-width: 768px) {
    font-size: 18px;
  }
}
.p-sitemap_archive{
  text-decoration: underline;
  margin-bottom: 32px;
  display: block;
}
.o-heading__item-lead{
  margin-bottom: 32px;
}
/* ===== sitemap accordion ===== */
/* 初期は閉じる */
.sitemap-list {
display: none;
}
/* 見出し */
.sitemap-heading {
position: relative;
padding-right: 32px;
}
/* ＋ */
.p-sitemap_lead{
position: relative;
}
.p-sitemap_lead::after {
content: "+";
position: absolute;
right: 4%;
top: 50%;
transform: translateY(-50%);
font-size: 22px;
color: #000;
}
/* 開いた状態 */
.sitemap.is-open .sitemap-list {
display: block;
}
.sitemap.is-open .p-sitemap_lead::after {
content: "―";
}