.contents > article .box {
  margin-top: clamp(3rem, 3.90625vw, 6rem);
}
.contents > article .box.calendar .img_box {
  margin-top: clamp(3rem, 3.90625vw, 4rem);
}
.contents .tab {
  margin-top: clamp(3rem, 3.90625vw, 6rem);
}
.contents .tab_btn {
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 15px;
}
.contents .tab_btn > li {
  width: 105px;
  min-width: 105px;
  height: 27.5px;
  cursor: pointer;
  border-radius: 4px;
  display: flex;
  justify-content: center;
  align-items: center;
  border: solid 1px #dadad9;
  font-size: 1.1rem;
}
@media (min-width: 1024px) {
  .contents .tab_btn > li {
    font-size: 2rem;
    width: 190px;
    min-width: 190px;
    height: 50px;
    border-radius: 7px;
  }
}
.contents .tab_contents {
  position: relative;
}
.contents .tab .library_lst {
  padding-top: clamp(3rem, 3.90625vw, 3.8rem);
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  pointer-events: none;
}
.contents .tab .library_lst > ul {
  margin-top: 30px;
}
@media (min-width: 1024px) {
  .contents .tab .library_lst > ul {
    padding-left: 30px;
  }
}
.contents .tab .library_lst > ul > li {
  position: relative;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  gap: 8px;
  border-bottom: solid 1px #dadad9;
  padding-block: 9px;
  padding-inline: 7px;
}
@media (min-width: 1024px) {
  .contents .tab .library_lst > ul > li {
    padding-block: 14px;
    padding-inline: 15px;
    gap: 15px;
  }
}
.contents .tab .library_lst > ul > li::before {
  content: "";
  display: block;
  background: url(../../../img/icon/pdf_icon.svg) no-repeat;
  background-size: 100%;
  width: 13px;
  height: 16px;
  min-width: 13px;
  min-height: 16px;
  margin-top: 5px;
}
@media (min-width: 1024px) {
  .contents .tab .library_lst > ul > li::before {
    width: 14.5px;
    height: 18px;
    min-width: 14.5px;
    min-height: 18px;
    margin-top: 7px;
  }
}
.contents .tab .library_lst > ul > li a {
  display: block;
  text-decoration: underline;
  color: #38525b;
}
@media (min-width: 1024px) {
  .contents .tab .library_lst > ul > li a:hover {
    text-decoration: none;
  }
}
.contents .tab .library_lst.ll_active {
  position: static;
  opacity: 1;
  pointer-events: all;
}
.briefing {
  margin-top: clamp(3rem, 3.90625vw, 6rem);
}
.briefing > dl dt {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: clamp(5rem, 6.5104166667vw, 7rem);
  border: solid clamp(0.1rem, 0.1302083333vw, 0.2rem) #dadad9;
  font-size: clamp(1.8rem, 2.34375vw, 2.6rem);
  font-weight: bold;
}
.briefing > dl dd {
  margin-top: 28px;
}
@media (min-width: 768px) {
  .briefing > dl dd > p {
    text-align: center;
  }
}
.briefing > dl dd .youtube , .briefing > dl dd .movie_link {
  margin-top: 28px;
  width: min(100%, 800px);
  margin-left: auto;
  margin-right: auto;
}
.briefing > dl dd .youtube iframe {
  aspect-ratio: 80/44.38;
  width: 100% !important;
  height: auto !important;
}
.briefing .btn-lst {
  margin-top: clamp(2.8rem, 3.6458333333vw, 5.5rem);
  width: calc(100% - 30px);
  margin-left: auto;
  margin-right: auto;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 11.5px;
}

.briefing > dl dd + dt{
    margin-top: 50px;
}

.briefing > dl dd .movie_link a{
    transition: 0.7es;
}

.briefing > dl dd .movie_link a:hover{
    opacity: 0.6;
}

@media (min-width: 1024px) {
  .briefing .btn-lst {
    /*gap: 69px;*/
    gap: 35px;
    width: 100%;
    display: flex;
    justify-content: center;
  }
}
.briefing .btn-lst > li {
  width: 100%;
}
@media (min-width: 1024px) {
  .briefing .btn-lst > li {
    width: calc((100% - 69px) / 2);
  }
}
.briefing .btn-lst > li a {
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  font-size: clamp(1.4rem, 1.8229166667vw, 2rem);
  line-height: 1.6;
  letter-spacing: 2.5px;
  padding-inline: 30px;
  padding-block: clamp(1rem, 1.3020833333vw, 1.6rem);
  background-color: #f2fbf5;
  border: solid #dadad9 1px;
  border-radius: 50px;
}
@media (min-width: 1024px) {
  .briefing .btn-lst > li a {
    background-color: #fff;
  }
  .briefing .btn-lst > li a:hover {
    background-color: #f2fbf5;
    transition: 0.3s;
  }
}
div.btn_en_lib {
  margin-top: clamp(1.5rem, 3.90625vw, 3rem);
}
div.btn_en_lib a {
  background-color: #FFF;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  font-size: 1.1rem;
  line-height: 1.6;
  letter-spacing: 2.5px;
  padding-inline: 30px;
  padding-block: clamp(0.5rem, 1.3020833333vw, 0.9rem);
  border: solid #dadad9 1px;
  border-radius: 7px;
}
@media (min-width: 1024px) {
  div.btn_en_lib {
    width: 30%;
  }
  div.btn_en_lib a {
    font-size: 2rem;
  }
  div.btn_en_lib a:hover {
    background-color: #FFF3F3;
  }
}