/*==================================
  Top
==================================*/
main {
  overflow: hidden;
  padding-top: 0;
  padding-bottom: 0;
}

body {
  position: relative;
}
body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: calc(50% - 40px);
  background: url("../images/top/key_deco.png") no-repeat top right/960px auto;
  height: 1032px;
  min-width: 660px;
}

#key {
  position: relative;
  padding: 131px 0 0;
  z-index: 2;
}
#key .key-ttl {
  position: absolute;
  z-index: 4;
  top: 192px;
  left: 109px;
  width: 452px;
}
@media screen and (max-width: 1400px) {
  #key .key-ttl {
    width: 32.3vw;
    left: 7.8vw;
  }
}
#key .group-img {
  position: relative;
}
#key .group-img .images .img {
  overflow: hidden;
  border-radius: 48px;
  transition: 0.5s all cubic-bezier(0, 0, 0.2, 1);
  opacity: 0;
  transform: scale(0.5);
}
#key .group-img .images.is-active .img {
  opacity: 1;
  transform: scale(1);
}
#key .group-img .images01 {
  display: flex;
  justify-content: space-between;
}
#key .group-img .images01 .left {
  width: 368px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin: 0 0 0 -236px;
}
#key .group-img .images01 .left .img1 {
  height: 358px;
}
#key .group-img .images01 .left .img2 {
  height: 231px;
}
@media screen and (max-width: 1400px) {
  #key .group-img .images01 .left {
    width: 26.3vw;
    margin: 0 0 0 -17vw;
  }
  #key .group-img .images01 .left .img1, #key .group-img .images01 .left .img2 {
    height: 100%;
  }
}
#key .group-img .images01 .right {
  width: calc(100% - 601px + 107px);
  margin: 0 -107px 0 0;
  display: grid;
  gap: 24px;
}
#key .group-img .images01 .right .images-top {
  grid-row: 1/1;
  grid-column: 1/4;
}
#key .group-img .images01 .right .images-top .img3 {
  height: 613px;
}
#key .group-img .images01 .right .images-top .img3 img {
  object-position: top center;
}
#key .group-img .images01 .right .images-bottom {
  display: flex;
  flex-direction: column-reverse;
  gap: 24px;
  grid-row: 1/1;
  grid-column: 4/6;
}
#key .group-img .images01 .right .images-bottom .img4 {
  height: 223px;
}
#key .group-img .images01 .right .images-bottom .img4 img {
  object-position: top center;
}
#key .group-img .images01 .right .images-bottom .img5 {
  height: 366px;
}
@media screen and (max-width: 1400px) {
  #key .group-img .images01 .right {
    width: calc(100% - 43vw + 7.65vw);
    margin-right: -7.65vw;
  }
  #key .group-img .images01 .right .images-top .img3 {
    height: 100%;
  }
  #key .group-img .images01 .right .images-bottom .img5 {
    height: 63%;
  }
  #key .group-img .images01 .right .images-bottom .img4 {
    height: 37%;
  }
}
#key .group-img .images02 {
  position: absolute;
  z-index: 1;
  top: 0;
  left: 0;
  width: 100%;
  bottom: 0;
  display: flex;
  justify-content: space-between;
}
#key .group-img .images02 .left {
  width: 368px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin: 0 0 0 -236px;
}
#key .group-img .images02 .left .img1 {
  height: 358px;
}
#key .group-img .images02 .left .img2 {
  height: 231px;
}
@media screen and (max-width: 1400px) {
  #key .group-img .images02 .left {
    width: 26.3vw;
    margin: 0 0 0 -17vw;
  }
  #key .group-img .images02 .left .img1, #key .group-img .images02 .left .img2 {
    height: 100%;
  }
}
#key .group-img .images02 .right {
  width: calc(100% - 601px + 107px);
  margin: 0 -107px 0 0;
  display: grid;
  gap: 24px;
}
#key .group-img .images02 .right .img5 {
  grid-row: 1/1;
  grid-column: 2/6;
  height: 613px;
}
#key .group-img .images02 .right .img5 img {
  object-position: top center;
}
#key .group-img .images02 .right .images-left {
  display: flex;
  flex-direction: column;
  gap: 24px;
  grid-row: 1/1;
  grid-column: 1/2;
}
#key .group-img .images02 .right .images-left .img3 {
  height: 223px;
}
#key .group-img .images02 .right .images-left .img4 {
  height: 366px;
}
@media screen and (max-width: 1400px) {
  #key .group-img .images02 .right {
    width: calc(100% - 43vw + 7.65vw);
    margin-right: -7.65vw;
  }
  #key .group-img .images02 .right .img5 {
    height: 100%;
  }
  #key .group-img .images02 .right .images-left .img3 {
    height: 63%;
  }
  #key .group-img .images02 .right .images-left .img4 {
    height: 37%;
  }
}

#about {
  position: relative;
  z-index: 3;
}
#about .set1 {
  position: relative;
  padding: 119px 0 0;
}
#about .set1 .deco {
  position: absolute;
  top: 69px;
  width: 432px;
  left: calc(50% + 289px);
}
@media screen and (max-width: 1000px) {
  #about .set1 .deco {
    left: calc(50% + 150px);
  }
}
#about .set1 .flex {
  display: flex;
  justify-content: space-between;
  flex-direction: row-reverse;
  align-items: flex-start;
}
#about .set1 .flex .group-img {
  width: 620px;
  max-width: calc(100% - 517px);
  position: relative;
}
#about .set1 .flex .group-img .img {
  overflow: hidden;
  border-radius: 60px;
}
#about .set1 .flex .group-img .deco2 {
  position: absolute;
  width: 144px;
  left: -81px;
  bottom: -40px;
}
#about .set1 .flex .group-content {
  width: 440px;
  margin: 70px 0 0;
}
#about .set1 .flex .group-content .txt {
  width: 416px;
  max-width: 100%;
  margin: 30px 0 0 0;
  text-align: justify;
}
@media screen and (max-width: 1000px) {
  #about .set1 .flex .group-img {
    max-width: 53%;
  }
  #about .set1 .flex .group-content {
    max-width: 42%;
  }
  #about .set1 .flex .group-content .ttl-common {
    font-size: 22px;
  }
}
#about .set2 {
  margin: 134px 0 0;
  padding: 0 0 188px;
  background: url("../images/top/lesson_bg_top.png") no-repeat bottom center/100% auto;
}
@media screen and (max-width: 1400px) {
  #about .set2 {
    background-size: auto;
  }
}
#about .set2 .list {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 50px 31px;
}
#about .set2 .list .item {
  width: 358px;
  max-width: calc((100% - 62px) / 3);
  background: #fff;
  position: relative;
  padding: 65px 0 52px;
  text-align: center;
  border-radius: 68px;
}
#about .set2 .list .item .icon1 {
  position: absolute;
  left: 0;
  right: 0;
  margin: 0 auto;
  width: 130px;
  top: -24px;
}
#about .set2 .list .item .icon2 {
  position: absolute;
  left: 0;
  right: 0;
  margin: 0 auto;
  width: 64px;
  top: -28px;
}
#about .set2 .list .item .icon3 {
  position: absolute;
  left: 0;
  right: 0;
  margin: 0 auto;
  width: 96px;
  top: -30px;
}
#about .set2 .list .item .txt {
  min-height: 57.6px;
  margin: 20px 10px 35px;
}
#about .set2 .list .item .btn-link {
  margin: 0 auto;
}
@media screen and (max-width: 900px) {
  #about .set2 .list {
    column-gap: 20px;
  }
  #about .set2 .list .item {
    border-radius: 34px;
    max-width: calc((100% - 40px) / 3);
  }
  #about .set2 .list .item .txt {
    font-size: 14px;
  }
  #about .set2 .list .item .btn-link {
    max-width: calc(100% - 20px);
  }
}

#lesson {
  position: relative;
  z-index: 4;
  margin: -15px 0;
  padding: 0 0 80px;
  background: #0057d6;
}
#lesson .wrap {
  position: relative;
}
#lesson .deco {
  position: absolute;
  top: 0;
  left: 254px;
  width: 151px;
}
#lesson .group-ttl {
  margin: 0 0 45px;
}
#lesson .group-ttl .ttl-en, #lesson .group-ttl .ttl-common {
  color: #fff;
}
#lesson .group-ttl .ttl-common {
  margin: 7px 0 0;
}
#lesson .lesson-js {
  position: relative;
}
#lesson .lesson-js .lesson-item {
  width: 306px;
  margin: 0 40px 0 0;
}
#lesson .lesson-js .lesson-item a {
  background: #fef9e2;
  border-radius: 28px;
  display: block;
  text-decoration: none;
  padding: 32px 32px 28px;
  color: #021211;
}
#lesson .lesson-js .lesson-item a .img {
  overflow: hidden;
  border-radius: 28px;
}
#lesson .lesson-js .lesson-item a .img img {
  transition: all 0.5s;
}
#lesson .lesson-js .lesson-item a:hover .img {
  opacity: 0.8;
}
#lesson .lesson-js .lesson-item a:hover .img img {
  transform: scale(1.1);
}
#lesson .lesson-js .lesson-item a .time {
  font-weight: 700;
  font-size: 14px;
  line-height: 1.5;
  margin: 15px 0;
  letter-spacing: 0.08em;
  word-break: break-all;
  overflow-wrap: break-word;
}
#lesson .lesson-js .lesson-item a .title {
  letter-spacing: 0.08em;
  font-weight: 700;
  word-break: break-all;
  overflow-wrap: break-word;
}
#lesson .lesson-js .lesson-item a .tag {
  margin: 15px 0 0;
}
#lesson .lesson-js .lesson-item a .tag span {
  display: inline-block;
  font-size: 12px;
  line-height: 1.5;
  padding: 8px 20px;
  letter-spacing: 0.08em;
  border-radius: 17px;
}
#lesson .lesson-js .lesson-item a .tag.cl1 span {
  background-color: #faadad;
}
#lesson .lesson-js .lesson-item a .tag.cl2 span {
  background-color: #fe9c33;
}
#lesson .lesson-js .lesson-item a .tag.cl3 span {
  background-color: #77e459;
}
#lesson .lesson-js .lesson-item a .tag.cl4 span {
  background-color: #ffd428;
}
#lesson .lesson-js .swiper-button-next, #lesson .lesson-js .swiper-button-prev {
  width: 40px;
  cursor: pointer;
  position: absolute;
  bottom: -80px;
  transform: none;
  top: auto;
  margin: 0;
  height: 40px;
  line-height: 0;
}
#lesson .lesson-js .swiper-button-next[aria-disabled=true], #lesson .lesson-js .swiper-button-prev[aria-disabled=true] {
  opacity: 0.5;
  cursor: context-menu;
}
#lesson .lesson-js .swiper-button-next span, #lesson .lesson-js .swiper-button-prev span {
  width: 100%;
  height: 40px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #fff;
  line-height: 0;
}
#lesson .lesson-js .swiper-button-next span img, #lesson .lesson-js .swiper-button-prev span img {
  width: 12px;
}
#lesson .lesson-js .swiper-button-next:after, #lesson .lesson-js .swiper-button-prev:after {
  display: none;
}
#lesson .lesson-js .swiper-button-next:hover, #lesson .lesson-js .swiper-button-prev:hover {
  opacity: 0.8;
}
#lesson .lesson-js .swiper-button-next:hover[aria-disabled=true], #lesson .lesson-js .swiper-button-prev:hover[aria-disabled=true] {
  opacity: 0.5;
}
#lesson .lesson-js .swiper-button-next {
  left: 48px;
}
#lesson .lesson-js .swiper-button-prev {
  left: 0;
}
#lesson .lesson-js .swiper-pagination {
  position: absolute;
  bottom: -64px;
  top: auto;
  left: 120px;
  display: flex;
  gap: 8px;
}
#lesson .lesson-js .swiper-pagination .swiper-pagination-bullet {
  margin: 0;
  width: 8px;
  height: 8px;
  box-sizing: border-box;
  border: 1px solid #fff;
  background: transparent;
  opacity: 1;
}
#lesson .lesson-js .swiper-pagination .swiper-pagination-bullet.swiper-pagination-bullet-active {
  background: #fff;
}
#lesson .lesson-js .swiper-pagination .swiper-pagination-bullet:hover {
  opacity: 0.8;
}
#lesson .btn-link {
  position: absolute;
  top: 22px;
  right: 0;
  width: 222px;
}
#lesson .btn-link a {
  font-size: 16px;
  padding: 16.5px 20px 16.5px 0;
}
#lesson .btn-link a::before {
  right: 10px;
}
#lesson .btn-link a:after {
  right: 20px;
}

#news {
  padding: 150px 0 22vw;
  position: relative;
  background: url("../images/top/lesson_bg_bottom.png") no-repeat top center/100% auto;
}
@media screen and (max-width: 1400px) {
  #news {
    background-size: auto;
    padding-bottom: 97px;
  }
}
#news .deco {
  position: absolute;
  z-index: 2;
  top: 16px;
  left: calc(50% + 307px);
  width: 141px;
}
#news .deco2 {
  position: absolute;
  z-index: 2;
  top: 119px;
  right: calc(50% + 159px);
  width: 100px;
}
#news .wrap {
  width: 960px;
}
#news .group-ttl {
  text-align: center;
  margin: 0 0 60px;
}
#news .btn-link {
  width: 230px;
  margin: 64px auto 0;
}