#key {
  background-image: url("../img/course/key.jpg");
  background-position: 43%;
}

#sec1 {
  padding: 5vw 0 20vw;
  position: relative;
  z-index: 0;
}

#sec1 h2 {
  margin-bottom: 8vw;
}

#sec1 h2 .fz25 {
  display: table;
  margin: 0 auto 2vw;
  position: relative;
}

#sec1 h2 .fz25:after {
  content: '';
  height: 1px;
  background: #3a3c3e;
  position: absolute;
  bottom: 0;
  left: 3vw;
  right: 2vw;
}

@media screen and (min-width: 768px) {
  #sec1 {
    padding: 121px 0 82px;
  }
  #sec1:before {
    content: '';
    width: 119px;
    height: 302px;
    background-image: url("../img/index/sec1_deco2.png");
    background-repeat: no-repeat;
    background-size: 100%;
    position: absolute;
    top: 0;
    right: calc(50% - 536px);
    z-index: -1;
  }
  #sec1 h2 {
    margin: 0 0 49px 12px;
  }
  #sec1 h2 .fz25 {
    margin: 0 auto 5px;
  }
  #sec1 h2 .fz25:after {
    left: 11px;
    right: 12px;
    bottom: 12px;
  }
  #sec1 h2 .fz25 span {
    margin-left: -4px;
  }
  #sec1 .txt {
    text-align: center;
  }
}

.s-title .ttl-bg {
  background: #ededed;
  padding-left: 2.3vw;
  letter-spacing: 0.3em;
}

.s-title .icon {
  margin: 0 -6vw 0 -3vw;
}

@media screen and (min-width: 768px) {
  .s-title .ttl-bg {
    padding: 0 0px 0 11px;
  }
  .s-title .icon {
    margin: 0 -37px 0 -23px;
  }
}

#sec2 {
  padding-bottom: 20vw;
}

#sec2 .note {
  margin: 0 2vw 2vw 0;
}

#sec2 .row1 {
  margin-bottom: 10vw;
}

#sec2 .row1 .img1 {
  margin: 0 0 15vw 4.7vw;
}

#sec2 .row1 .col-text {
  padding: 0 4.7vw;
}

#sec2 .row1 .col-text h2 {
  margin: 0 -2vw 5vw 0;
}

#sec2 .row1 .col-text h2 .s-title {
  margin-top: 4vw;
}

#sec2 .row1 .col-text .price {
  margin-bottom: 8vw;
}

#sec2 .row2 .box {
  background: rgba(255, 255, 255, 0.35);
  padding: 6vw 6vw;
  margin-bottom: 8vw;
}

#sec2 .row2 .box .ttl {
  margin-bottom: 3vw;
}

#sec2 .row2 .box ul {
  line-height: 26px;
}

#sec2 .row2 .img2 {
  width: 76vw;
  margin: 0 auto;
}

@media screen and (min-width: 768px) {
  #sec2 {
    padding-bottom: 115px;
  }
  #sec2 .note {
    margin: 0 13px 32px 0;
  }
  #sec2 .row1 {
    margin-bottom: 0;
  }
  #sec2 .row1 .img1 {
    order: 2;
    width: calc(100% - 550px);
    height: 700px;
    margin: 0;
  }
  #sec2 .row1 .col-text {
    order: 1;
    width: 550px;
    padding: 73px 30px 0 53px;
  }
  #sec2 .row1 .col-text h2 {
    margin: 0 0 20px 0;
  }
  #sec2 .row1 .col-text h2 .eng-ttl {
    margin: 0 0 2px 13px;
  }
  #sec2 .row1 .col-text h2 .m-title {
    margin-left: 15px;
  }
  #sec2 .row1 .col-text h2 .s-title {
    margin-top: 13px;
  }
  #sec2 .row1 .col-text .price {
    margin: 0 25px 56px 0;
  }
  #sec2 .row1 .col-text .box-check {
    margin-left: 43px;
  }
  #sec2 .row2 {
    position: relative;
    z-index: 1;
  }
  #sec2 .row2 .box {
    order: 2;
    width: 500px;
    padding: 31px 20px 38px;
    margin: 52px 10px 0 0;
  }
  #sec2 .row2 .box .ttl {
    margin-bottom: 19px;
  }
  #sec2 .row2 .box ul {
    line-height: 30px;
    margin-left: 42px;
  }
  #sec2 .row2 .img2 {
    order: 1;
    width: 560px;
    margin: -158px 0 0 -120px;
  }
}

#sec3 {
  padding-bottom: 20vw;
}

#sec3 .row1 {
  margin-bottom: 10vw;
}

#sec3 .row1 .img1 {
  margin: 0 4.7vw 12vw 0;
}

#sec3 .row1 .col-text {
  padding: 0 4.7vw;
}

#sec3 .row1 .col-text h2 {
  text-align: center;
  margin: 0 -2vw 5vw 0;
}

#sec3 .row1 .col-text h2 .fz28 {
  letter-spacing: 0.4em;
}

#sec3 .row1 .col-text h2 .m-title {
  margin-top: 2vw;
}

#sec3 .row1 .col-text h2 .s-title {
  margin-top: 4vw;
}

#sec3 .row1 .col-text .price {
  margin-bottom: 8vw;
}

#sec3 .row2 .box {
  background: rgba(255, 255, 255, 0.35);
  padding: 6vw;
}

#sec3 .row2 .box .ttl {
  margin-bottom: 3vw;
}

#sec3 .row2 .box ul {
  line-height: 26px;
}

@media screen and (min-width: 768px) {
  #sec3 {
    padding-bottom: 138px;
  }
  #sec3 .row1 {
    margin-bottom: 49px;
  }
  #sec3 .row1 .img1 {
    width: calc(100% - 560px);
    height: 650px;
    margin: 0;
  }
  #sec3 .row1 .col-text {
    width: 560px;
    padding: 88px 20px 0;
  }
  #sec3 .row1 .col-text h2 {
    margin: 0 0 20px 10px;
  }
  #sec3 .row1 .col-text h2 .m-title {
    margin-top: 1px;
  }
  #sec3 .row1 .col-text h2 .s-title {
    margin: 22px 18px 0 0;
  }
  #sec3 .row1 .col-text h2 .s-title .icon {
    margin: 0 -28px 0 -20px;
  }
  #sec3 .row1 .col-text .price {
    margin: 0 36px 43px 0;
  }
  #sec3 .row1 .col-text .txt {
    width: 380px;
    margin: 0 auto;
    padding-left: 3px;
  }
  #sec3 .row2 .box {
    width: 850px;
    margin: 0 auto;
    padding: 33px 40px 45px;
  }
  #sec3 .row2 .box .ttl {
    margin-bottom: 20px;
  }
  #sec3 .row2 .box .list {
    display: flex;
    justify-content: center;
    padding-right: 20px;
  }
  #sec3 .row2 .box ul {
    line-height: 30px;
  }
  #sec3 .row2 .box ul + ul {
    margin-left: 27px;
  }
}

#sec4 {
  position: relative;
  z-index: 0;
  padding-bottom: 20vw;
}

#sec4:before {
  content: '';
  background-image: url("../img/course/sec4_bg.jpg");
  background-size: cover;
  background-position: center top;
  position: absolute;
  left: 0;
  right: 0;
  top: 30vw;
  bottom: 0;
  z-index: -1;
}

#sec4 .row1 {
  padding: 0 4.7vw;
}

#sec4 .row1 .img1 {
  margin-bottom: 5vw;
}
#sec4 .row1 .scene_img {
  margin-bottom: 12vw;
}
#sec4 .row1 .col-text h2 {
  margin: 0 -2vw 5vw 0;
}

#sec4 .row1 .col-text h2 .eng-ttl {
  margin-bottom: 3vw;
}

#sec4 .row1 .col-text h2 .xs-title {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2vw;
  margin-bottom: 5vw;
}

#sec4 .row1 .col-text h2 .s-title1 {
  letter-spacing: 0.4em;
  margin-bottom: 1vw;
}

#sec4 .row1 .col-text h2 .m-title {
  letter-spacing: 0.28em;
  margin-bottom: 5vw;
}

#sec4 .row1 .col-text h2 .s-title2 {
  margin-bottom: 5vw;
}

#sec4 .row1 .col-text h2 .s-title3 {
  text-align: right;
  margin-right: 2vw;
}

#sec4 .row1 .col-text h2 .s-title3 .and {
  margin-right: -5vw;
}

#sec4 .row1 .col-text .price {
  margin-bottom: 8vw;
}

#sec4 .row1 .col-text .box-check {
  margin-bottom: 8vw;
}

#sec4 .row2 .txt {
  margin-bottom: 8vw;
}

#sec4 .row2 .box {
  background: rgba(255, 255, 255, 0.5);
  padding: 6vw;
  margin-bottom: 10vw;
}

#sec4 .row2 .box .ttl {
  margin-bottom: 3vw;
}

#sec4 .row2 .box ul {
  line-height: 26px;
}

#sec4 .row2 .s4-gif {
  width: 60vw;
  margin: 0 auto;
  line-height: 0;
  pointer-events: none;
}

@media screen and (min-width: 768px) {
  #sec4 {
    padding-bottom: 132px;
  }
  #sec4:before {
    top: 33px;
  }
  #sec4 .row1 {
    padding: 0;
    margin-bottom: 410px;
  }
  #sec4 .row1 .inner {
    max-width: 1416px;
    width: 100%;
    margin: 0 auto;
  }
  #sec4 .row1 .img1 {
    order: 2;
    max-width: 713px;
    width: calc(100% - 640px);
    height: 1010px;
    margin-bottom: 0;
  }
  #sec4 .row1 .col-text {
    order: 1;
    width: 592px;
    margin-top: 264px;
  }
  #sec4 .row1 .col-text h2 {
    margin: 0 0 21px 0;
  }
  #sec4 .row1 .col-text h2 .eng-ttl {
    margin-bottom: 11px;
  }
  #sec4 .row1 .col-text h2 .xs-title {
    text-underline-offset: 9px;
    margin-bottom: 2px;
  }
  #sec4 .row1 .col-text h2 .s-title1 {
    margin-bottom: -6px;
  }
  #sec4 .row1 .col-text h2 .m-title {
    letter-spacing: 0.4em;
    margin-bottom: 0px;
  }
  #sec4 .row1 .col-text h2 .s-title2 {
    margin: 0 0 1px -14px;
  }
  #sec4 .row1 .col-text h2 .s-title3 {
    width: 505px;
    margin-right: 0;
  }
  #sec4 .row1 .col-text h2 .s-title3 .and {
    margin-right: -25px;
  }
  #sec4 .row1 .col-text .price {
    width: 511px;
    margin-bottom: 40px;
  }
  #sec4 .row1 .col-text .box-check {
    margin: 0 0 0 -5px;
    max-width: 521px;
    padding: 34px 10px 36px 39px;
    display: flex;
  }
  #sec4 .row1 .col-text .box-check ul + ul {
    margin-left: 38px;
  }

  #sec4 .scene_img{
    position: absolute;
    top: -410px;
    right: 10px;
  }
  #sec4 .row2 {
    position: relative;
    padding-top: 99px;
  }
  #sec4 .row2 .txt {
    width: 614px;
    margin: 0 auto 70px;
    text-align: center;
  }
  #sec4 .row2 .box {
    width: 850px;
    padding: 33px 20px 45px;
    margin: 0 auto;
  }
  #sec4 .row2 .box .ttl {
    margin-bottom: 20px;
  }
  #sec4 .row2 .box .list {
    display: flex;
    justify-content: center;
    padding-left: 29px;
  }
  #sec4 .row2 .box ul {
    line-height: 30px;
  }
  #sec4 .row2 .box ul + ul {
    margin-left: 18px;
  }
  #sec4 .row2 .s4-gif {
    width: 371px;
    margin: 0;
    position: absolute;
    left: -27px;
    top: -681px;
  }
}

#sec5 {
  padding: 20vw 0;
}

#sec5 h2 {
  margin-bottom: 10vw;
}

#sec5 h2 .eng-ttl {
  margin-bottom: 2vw;
}

#sec5 .row {
  margin-bottom: 10vw;
  padding: 0 4.7vw;
}

#sec5 .row .img {
  margin-bottom: 8vw;
}

#sec5 .row .time {
  display: table;
  background: #404658;
  color: #fff;
  font-size: 4vw;
  letter-spacing: 0.3em;
  line-height: 1.2;
  padding: 2vw 3vw 2vw 5vw;
  margin-bottom: 3vw;
}

#sec5 .row dl {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 6vw;
}

#sec5 .row dl dt {
  letter-spacing: 0.3em;
}

#sec5 .row .txt {
  margin-bottom: 8vw;
}

#sec5 .row .box {
  background: rgba(255, 255, 255, 0.35);
  padding: 6vw;
}

#sec5 .row .box .ttl {
  margin-bottom: 3vw;
}

#sec5 .row .box ul {
  line-height: 26px;
}

@media screen and (min-width: 768px) {
  #sec5 {
    padding: 137px 0 93px;
  }
  #sec5 h2 {
    margin: 0 0 96px 13px;
  }
  #sec5 h2 .eng-ttl {
    margin: 0 11px 20px 0;
  }
  #sec5 .row {
    margin-bottom: 48px;
    padding: 0;
  }
  #sec5 .row .inner {
    max-width: 1500px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
  }
  #sec5 .row .img {
    max-width: 854px;
    width: calc(100% - 546px);
    height: 664px;
    margin: 0;
    position: relative;
    z-index: 1;
  }
  #sec5 .row .col-text {
    width: 546px;
    float: right;
    padding: 61px 0 0 75px;
  }
  #sec5 .row .time {
    font-size: 20px;
    padding: 11px 24px 15px 31px;
    margin: 0 0 9px -31px;
  }
  #sec5 .row dl {
    width: 424px;
    margin-bottom: 18px;
  }
  #sec5 .row dl .price {
    padding-bottom: 15px;
  }
  #sec5 .row .txt {
    width: 417px;
    text-align: left;
    margin: 0 0 55px 0px;
  }
  #sec5 .row .box {
    background: transparent;
    padding: 33px 26px 35px 0;
    position: relative;
    z-index: 0;
  }
  #sec5 .row .box:before {
    content: '';
    width: 1034px;
    background: rgba(255, 255, 255, 0.35);
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: -1;
  }
  #sec5 .row .box .ttl {
    margin-bottom: 20px;
  }
  #sec5 .row .box ul {
    line-height: 30px;
    margin-left: 0px;
  }
  #sec5 .row2 .txt {
    margin-bottom: 85px;
  }
}

#sec6 {
  padding: 0 0 20vw;
  background-image: url("../img/course/sec6_bg.png");
  background-repeat: no-repeat;
  background-size: 200%;
  background-position: center bottom;
}

#sec6 h2 {
  margin-bottom: 10vw;
}

#sec6 h2 .eng-ttl {
  margin-bottom: 2vw;
}

#sec6 .box {
  background: rgba(255, 255, 255, 0.35);
  margin-bottom: 5vw;
  padding: 8vw 6vw;
}

#sec6 .box .col-left {
  border-bottom: 1px solid rgba(0, 0, 0, 0.3);
  padding-bottom: 5vw;
  margin-bottom: 5vw;
}

#sec6 .box dl {
  text-align: center;
  padding-bottom: 4vw;
  margin-bottom: 5vw;
  border-bottom: 1px solid rgba(0, 0, 0, 0.3);
}

#sec6 .box dl .db.fz28 {
  letter-spacing: 0.4em;
}

#sec6 .box dl .s-title {
  font-size: 4vw;
}

#sec6 .box dl .s-title .icon {
  margin: 0 -2vw 0 -1vw;
}

#sec6 .box dl .fz20 {
  font-size: 4vw;
  line-height: 1;
}

#sec6 .box dl dt {
  margin-bottom: 4vw;
}

#sec6 .box .check-list {
  display: table;
  margin: 0 auto;
}

#sec6 .box .list .ttl {
  text-align: center;
  margin-bottom: 3vw;
}

#sec6 .box .list ul {
  line-height: 26px;
}

#sec6 .banner {
  margin-top: 15vw;
}

#sec6 .banner a {
  position: relative;
}

#sec6 .banner a .ttl {
  line-height: 10vw;
  letter-spacing: 0.36em;
  position: absolute;
  bottom: 3vw;
  left: 4vw;
  z-index: 1;
}

#sec6 .banner a .ttl img {
  width: 3vw;
  margin: -1vw 0 0 2vw;
}

#sec6 .banner a .img {
  height: 60vw;
}

@media screen and (min-width: 768px) {
  #sec6 {
    padding-bottom: 150px;
    background-size: 100%;
  }
  #sec6 h2 {
    margin: 0 0 58px 11px;
  }
  #sec6 h2 .eng-ttl {
    margin: 0 11px 20px 0;
  }
  #sec6 .box {
    width: 1080px;
    background: rgba(255, 255, 255, 0.35);
    margin: 0 -40px 30px;
    padding: 64px 40px 54px;
    display: flex;
    justify-content: space-between;
    align-items: start;
    position: relative;
  }
  #sec6 .box:before {
    content: '';
    width: 1px;
    background: rgba(0, 0, 0, 0.3);
    position: absolute;
    left: 474px;
    top: 62px;
    bottom: 47px;
  }
  #sec6 .box .col-left {
    width: 434px;
    border-bottom: none;
    padding: 0 25px 0px 0;
    margin: 0;
  }
  #sec6 .box dl {
    padding-bottom: 33px;
    margin-bottom: 20px;
    margin: -10px 47px 30px;
  }
  #sec6 .box dl .icon2 {
    margin: 10px 14px 8px 0;
  }
  #sec6 .box dl .db.fz28 {
    line-height: 40px;
  }
  #sec6 .box dl dt {
    margin-bottom: 16px;
  }
  #sec6 .box dl dd {
    padding-right: 14px;
  }
  #sec6 .box .check-list {
    width: 217px;
    white-space: nowrap;
  }
  #sec6 .box .list {
    width: 499px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  #sec6 .box .list .ttl {
    text-align: left;
    margin: 0 0 21px 4px;
  }
  #sec6 .box .list ul {
    line-height: 30px;
  }
  #sec6 .banner {
    margin-top: 150px;
  }
  #sec6 .banner a .ttl {
    line-height: 60px;
    bottom: 29px;
    left: 38px;
  }
  #sec6 .banner a .ttl img {
    width: 13px;
    margin: -5px 0 0 13px;
    transition: 0.3s all ease;
  }
  #sec6 .banner a .img {
    height: 470px;
  }
  #sec6 .banner a:hover img {
    opacity: 1 !important;
  }
  #sec6 .banner a:hover .ttl img {
    transform: translateX(10px);
  }
}