.blog_nav {
  border-bottom: 1px solid #b9b9b9;
}
.blog_nav .nav .nav_list {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem 5.4rem;
}
.blog_nav .nav .nav_item {
  position: relative;
  display: block;
  cursor: pointer;
  transition: all 0.3s;
  text-transform: uppercase;
  font-weight: 500;
  color: #121212;
  padding: 3.6rem 0 3.2rem;
  margin-bottom: -1px;
}
.blog_nav .nav .nav_item::after {
  position: absolute;
  width: 2.7rem;
  height: 0.4rem;
  left: 50%;
  bottom: 0;
  content: '';
  background-color: var(--primary);
  transition: all 0.3s;
  opacity: 0;
  transform: translateX(-50%);
}
.blog_nav .nav .nav_item:hover::after,
.blog_nav .nav .nav_item.active::after {
  opacity: 1;
}
.blog_main {
  padding: 9.5rem 0 12.2rem;
}
.blog_main .list ul {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 5.9rem 2.2%;
}
.blog_main nav.navigation {
  margin-top: 12.8rem;
}
.blog_list .active .info {
  border-bottom-color: var(--primary);
}
.blog_list a {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.blog_list a:hover img {
  transform: scale(1.03);
}
.blog_list .img {
  padding-bottom: 56.69456067%;
}
.blog_list .info {
  flex: 1;
  max-width: 44.7rem;
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid #b9b9b9;
  transition: all 0.3s;
  padding: 3rem 0 2.6rem;
}
.blog_list .info .title {
  font-size: 2.4rem;
  line-height: 3rem;
  font-weight: 600;
  color: #121212;
  max-width: 42.1rem;
  overflow: hidden;
  text-overflow: ellipsis;
  -webkit-line-clamp: 2;
  display: -webkit-box;
  -webkit-box-orient: vertical;
}
.blog_list .info .desc {
  line-height: 2.4rem;
  color: var(--text);
  margin-top: 1.8rem;
  margin-bottom: auto;
  hyphens: auto;
  overflow: hidden;
  text-overflow: ellipsis;
  -webkit-line-clamp: 2;
  display: -webkit-box;
  -webkit-box-orient: vertical;
}
.blog_list .info .date {
  display: grid;
  grid-template-columns: 1fr 1.8rem;
  align-items: end;
  color: var(--text);
  gap: 2rem;
  margin-top: 2.5rem;
}
.blog_list .info .date::after {
  display: block;
  padding-bottom: 100%;
  content: '';
  background: url("../img/nav-r.png") no-repeat center right / contain;
  margin-bottom: -1px;
}
.papers_main {
  padding: 11.3rem 0 8.1rem;
}
.papers_main .head h2 {
  font-size: 4.6rem;
}
.papers_main .list {
  margin-top: 7.1rem;
}
.papers_main .list ul {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.8rem 1.73333333%;
}
.paper_list a {
  display: flex;
  flex-direction: column;
  height: 100%;
  border-radius: 1rem;
  border: 1px solid #e9eef3;
  background-color: #f9fafc;
  transition: all 0.3s;
  padding: 5.9701493% 7.3270014% 4.4776119% 7.5983718%;
}
.paper_list a:hover {
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.05);
}
.paper_list .title {
  font-size: 2.4rem;
  line-height: 3rem;
  font-weight: 600;
  color: #121212;
  overflow: hidden;
  text-overflow: ellipsis;
  -webkit-line-clamp: 1;
  display: -webkit-box;
  -webkit-box-orient: vertical;
}
.paper_list .desc {
  line-height: 2.4rem;
  color: var(--text);
  max-width: 57.5rem;
  margin-top: 1.2rem;
  margin-bottom: auto;
  hyphens: auto;
  overflow: hidden;
  text-overflow: ellipsis;
  -webkit-line-clamp: 2;
  display: -webkit-box;
  -webkit-box-orient: vertical;
}
.paper_list .date {
  display: grid;
  grid-template-columns: 1fr 1.8rem;
  align-items: end;
  color: var(--text);
  gap: 2rem;
  margin-top: 3rem;
}
.paper_list .date::after {
  display: block;
  padding-bottom: 100%;
  content: '';
  background: url("../img/nav-r.png") no-repeat center right / contain;
  margin-bottom: -1px;
}
@media screen and (min-width: 769px) and (max-width: 896px) {
  .blog_main .list ul {
    grid-template-columns: 1fr 1fr;
  }
  .papers_main .head h2 {
    font-size: 4rem;
  }
}
@media screen and (max-width: 768px) {
  .blog_nav .nav .nav_list {
    width: calc(100% + 40px);
    margin: 0 -20px 0;
    padding: 0 20px;
    overflow-x: auto;
    flex-wrap: nowrap;
    gap: 22px;
  }
  .blog_nav .nav .nav_list::-webkit-scrollbar {
    display: none;
  }
  .blog_nav .nav .nav_item {
    padding: 14px 0;
    margin-bottom: 0;
    white-space: nowrap;
  }
  .blog_nav .nav .nav_item::after {
    height: 2px;
    width: 20px;
  }
  .blog_main,
  .papers_main {
    padding: 50px 0;
  }
  .blog_main .list ul,
  .papers_main .list ul {
    grid-template-columns: repeat(auto-fill, minmax(min(250px, 100%), 1fr));
    gap: 30px 20px;
  }
  .papers_main .head h2 {
    font-size: 22px;
  }
  .papers_main .list {
    margin-top: 30px;
  }
  .blog_list .info {
    padding: 14px 0;
  }
  .blog_list .info .title {
    font-size: 18px;
    line-height: 1.5;
  }
  .blog_list .info .desc {
    line-height: 1.5;
    margin-top: 10px;
  }
  .blog_list .info .date {
    grid-template-columns: 1fr 14px;
    gap: 14px;
    margin-top: 20px;
  }
  .blog_list .info .date::after {
    margin: 0;
  }
  .paper_list a {
    padding: 20px;
  }
  .paper_list .title {
    font-size: 18px;
    line-height: 1.5;
  }
  .paper_list .desc {
    line-height: 1.5;
    margin-top: 10px;
  }
  .paper_list .date {
    grid-template-columns: 1fr 14px;
    gap: 14px;
    margin-top: 20px;
  }
  .paper_list .date::after {
    margin: 0;
  }
}