.article-news {
  max-width: 72rem;
  margin: 0 auto;
  position: relative;
  padding: 15vh 2rem;
}
@media only screen and (max-width: 1023px) {
  .article-news {
    padding-top: 10vw;
    padding-bottom: 10vw;
  }
}
@media only screen and (max-width: 1023px) and (max-width: 767px) {
  .article-news {
    padding-left: 5%;
    padding-right: 5%;
  }
}

.article-news-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  padding-bottom: 5vh;
}
@media only screen and (max-width: 1023px) {
  .article-news-header {
    padding-bottom: 5vw;
  }
}
.article-news-header-ttl {
  font-family: "Noto Serif JP", serif;
  font-size: 2.8rem;
  width: 100%;
}
@media only screen and (max-width: 767px) {
  .article-news-header-ttl {
    font-size: 1.8rem;
    line-height: 1.3;
  }
}
.article-news-header-time {
  width: 100%;
  text-align: right;
  font-family: "Playfair Display", serif;
  font-size: 1.5rem;
  color: rgba(13, 30, 46, 0.8);
}
@media only screen and (max-width: 767px) {
  .article-news-header-time {
    font-size: 1.3rem;
  }
}
.article-news-fig {
  margin-bottom: 3vh;
}
.article-news-inner p {
  font-size: 1.5rem;
  line-height: 1.8;
  padding-bottom: 1.5em;
}
@media only screen and (max-width: 767px) {
  .article-news-inner p {
    font-size: 1.3rem;
    padding-bottom: 1em;
  }
}

.div-news {
  max-width: 100rem;
  margin: 0 auto;
  position: relative;
  display: flex;
  justify-content: space-between;
  padding: 15vh 3%;
}
@media only screen and (max-width: 1023px) {
  .div-news {
    padding-top: 10vw;
    padding-bottom: 10vw;
  }
}
@media only screen and (max-width: 1023px) and (max-width: 767px) {
  .div-news {
    padding-left: 5%;
    padding-right: 5%;
    flex-direction: column;
  }
}

.div-news .nav-year {
  width: 24rem;
  flex-shrink: 0;
  padding: 2rem;
  background: rgba(243, 244, 244, 0.5);
  position: relative;
}
@media only screen and (max-width: 1023px) {
  .div-news .nav-year {
    width: 18rem;
  }
}
@media only screen and (max-width: 1023px) and (max-width: 767px) {
  .div-news .nav-year {
    width: 100%;
    margin-top: 3rem;
  }
}

.div-news .nav-year:before {
  content: "Archive";
  position: absolute;
  right: 1rem;
  top: -.5em;
  line-height: 1;
  font-size: 1.4rem;
  font-family: "Playfair Display", serif;
  opacity: 0.5;
  font-style: italic;
}
.div-news .nav-year ul li {
  font-family: "Playfair Display", serif;
  border-bottom: .1rem solid #fff;
}
.div-news .nav-year ul li:nth-last-of-type(1) {
  border-bottom: none;
}
.div-news .nav-year ul li a {
  height: 5rem;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 0 2rem;
  font-size: 1.8rem;
}
@media only screen and (max-width: 767px) {
  .div-news .nav-year ul li a {
    font-size: 1.5rem;
  }
}
.div-news .nav-year ul li a:hover {
  background: #fff;
}
.div-news .nav-year ul li a:before {
  content: "\e5cc";
  font-family: 'Material Icons';
  color: #c30d23;
  font-size: 1.2rem;
  margin-top: 0.5rem;
}
@media only screen and (max-width: 767px) {
  .div-news .nav-year ul li a:before {
    font-size: 1.1rem;
  }
}
.div-news-inner {
  padding-right: 2rem;
  width: 100%;
}
.div-news-inner-ttl {
  font-family: "Playfair Display", serif;
  font-size: 4.8rem;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 6vh;
  text-align: center;
}
@media only screen and (max-width: 1023px) {
  .div-news-inner-ttl {
    margin-bottom: 6vw;
  }
}
@media only screen and (max-width: 1023px) and (max-width: 767px) {
  .div-news-inner-ttl {
    font-size: 3rem;
  }
}

.div-news-inner-ttl:before, .div-news-inner-ttl:after {
  content: "";
  width: 4rem;
  height: .1rem;
  background: #0d1e2e;
  opacity: 0.3;
  margin: 1.5rem 1.5rem 0 1.5rem;
}
@media only screen and (max-width: 767px) {
  .div-news-inner-ttl:before, .div-news-inner-ttl:after {
    width: 2rem;
    margin: 1rem 1rem 0;
  }
}
.div-news-inner dl {
  border-top: 0.1rem solid #f3f4f4;
  font-family: "Noto Serif JP", serif;
}
.div-news-inner dl div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem;
  border-bottom: 0.1rem solid #f3f4f4;
  position: relative;
}
.div-news-inner dl div a {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 10;
  cursor: pointer;
}
.div-news-inner dl div:hover {
  background: rgba(243, 244, 244, 0.5);
}
@media only screen and (max-width: 767px) {
  .div-news-inner dl div {
    flex-direction: column;
    padding: 1rem;
  }
}
.div-news-inner dl dd {
  width: 100%;
  font-size: 1.6rem;
  padding-left: 1.5rem;
  display: flex;
  justify-content: flex-start;
  align-items: center;
}
@media only screen and (max-width: 1023px) and (max-width: 767px) {
  .div-news-inner dl dd {
    padding: 0;
    font-size: 1.2rem;
  }
}

.div-news-inner dl dt {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  position: relative;
  font-size: 1.6rem;
  font-family: "Playfair Display", serif;
  font-weight: 400;
}
@media only screen and (max-width: 767px) {
  .div-news-inner dl dt {
    width: 100%;
    font-size: 1.4rem;
    margin-bottom: .3rem;
  }
}
.div-news-inner dl dt span {
  border-radius: 10rem;
  font-size: 1rem;
  width: 7rem;
  height: 1.8rem;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: 700;
  margin-left: 1.5rem;
  font-family: "Inter", "Noto Sans JP", sans-serif;
}
.div-news-inner dl dt span.cat_news {
  background: #c30d23;
  color: #fff;
}
.div-news-inner dl dt span.cat_seminar {
  background: #f3f4f4;
}