.enfont {
  font-family: "Lexend", sans-serif;
  font-optical-sizing: auto;
  font-weight: 500;
  font-style: normal;
}

@media screen and (min-width: 769px) {
  section.head_section {
    padding-top: 13.35rem;
    padding-bottom: 13.35rem;
    border-radius: 0 0 8rem 8rem;
    background: url(/files/user/mirai-eye/images/common/qfd_10a_left.png) calc(50% + 40rem) calc(50% - 1rem)/auto 28.4rem no-repeat #FFF3D6;
  }
  section.head_section h1 {
    font-weight: 500;
    font-size: 5.2rem;
    line-height: 1.25;
  }
  section.head_section .sub {
    margin-top: 0.8rem;
    font-weight: 500;
    font-size: 1.6rem;
  }
  section.head_section .tais {
    width: fit-content;
    position: absolute;
    right: 1rem;
    font-size: 1.4rem;
    margin-top: 8rem;
    font-weight: 500;
  }
  section.intro_section {
    background: url(/files/user/mirai-eye/images/common/bg_orange.png) center top/144rem auto no-repeat;
  }
  section.intro_section .deco {
    position: absolute;
    z-index: 1;
  }
  section.intro_section .deco.deco1 {
    width: 8.7rem;
    right: calc(50% + 35.4rem);
    top: -2.1rem;
  }
  section.intro_section .deco.deco2 {
    width: 8.4rem;
    right: calc(50% + 49.7rem);
    bottom: -3.5rem;
  }
  section.intro_section .deco.deco3 {
    width: 13.4rem;
    left: calc(50% + 34.5rem);
    top: -2.1rem;
  }
  section.intro_section .deco.deco4 {
    width: 15rem;
    left: calc(50% + 45.3rem);
    bottom: -3.5rem;
  }
  section.intro_section .intro_ttl {
    width: fit-content;
    margin: 0 auto 4rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.8rem;
    font-weight: 500;
    font-size: 2rem;
  }
  section.intro_section .intro_ttl img {
    width: 28rem;
  }
  section.intro_section .text {
    font-size: 1.8rem;
    line-height: 2;
  }
  section.intro_section .text .row {
    display: block;
  }
  section.intro_section .text .row + .row {
    margin-top: 1.6rem;
  }
  section.features_section .bg_wrap {
    margin: 5.6rem auto 0;
    width: 100%;
    padding: 6.4rem 4rem 4rem;
    background: #fff;
    border-radius: 2.4rem;
  }
  section.features_section .features_wrap {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    background: #FFFBD3;
    border-radius: 2.4rem;
    padding: 3.2rem 2.4rem 2.4rem;
  }
  section.features_section .features_wrap .col {
    width: calc(33.3333333333% - 2.6666666667rem);
  }
  section.features_section .features_wrap .col .pic {
    width: 100%;
    margin: 0 auto 2.4rem;
  }
  section.features_section .features_wrap .col .col_title {
    display: flex;
    width: 100%;
    justify-content: flex-start;
    align-items: center;
    font-weight: 500;
    font-size: 2.4rem;
    line-height: 1.5;
    color: #FF8800;
    padding-bottom: 0.8rem;
    border-bottom: #FF8800 1px solid;
    gap: 1.6rem;
    margin-bottom: 1.6rem;
  }
  section.features_section .features_wrap .col .col_title .label {
    display: flex;
    width: 6.3rem;
    height: 2.9rem;
    border-radius: 0.8rem;
    background: #FF8800;
    color: #fff;
    font-size: 1.4rem;
    justify-content: center;
    align-items: center;
  }
  section.features_section .features_wrap .col .col_text {
    font-weight: 500;
    font-size: 2.2rem;
  }
  section.features_section .features_wrap .col .text {
    margin-top: 1.6rem;
  }
  section.features_section .features_wrap .col .text .note {
    display: block;
    margin-top: 0.4rem;
    font-size: 1.2rem;
  }
  section.features_section .functions_wrap {
    width: 100%;
    margin: 0 auto 0;
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 4rem 0;
    flex-wrap: wrap;
  }
  section.features_section .functions_wrap .col {
    width: 36rem;
    border-left: #DEDEDE 1px solid;
    padding: 0;
  }
  section.features_section .functions_wrap .col:nth-child(3n+1) {
    border-left: none;
  }
  section.features_section .functions_wrap .col .col_title {
    text-align: center;
    font-weight: 500;
    font-size: 2.4rem;
    margin-bottom: 2.4rem;
  }
  section.features_section .functions_wrap .col .pic {
    margin: 0 auto 2.4rem;
  }
  section.features_section .functions_wrap .col .pic.pic_w {
    padding: 0 2.4rem;
  }
  section.features_section .functions_wrap .col .text {
    padding: 0 2.4rem;
  }
  section.features_section .functions_wrap .col .note {
    display: block;
    font-size: 1.4rem;
    margin-top: 0.4rem;
  }
  section.features_section .scene {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin: 8rem auto 0;
    flex-wrap: wrap;
    text-align: center;
  }
  section.features_section .scene h3 {
    width: 100%;
    font-weight: 500;
    font-size: 2.8rem;
    line-height: 1.25;
    margin-bottom: 2.4rem;
  }
  section.features_section .scene .text {
    margin-bottom: 4rem;
    width: 100%;
    font-size: 1.8rem;
  }
  section.features_section .scene .col {
    width: 18rem;
  }
  section.features_section .scene .col .pic {
    width: 100%;
    border-radius: 50%;
    background: #fff;
  }
  section.features_section .scene .col .col_text {
    margin-top: 1.6rem;
    font-weight: 500;
    font-size: 1.8rem;
    width: 120%;
    left: -10%;
    white-space: nowrap;
  }
  section.flow_section {
    background: url(/files/user/mirai-eye/images/common/bg_orange.png) center top/144rem auto no-repeat;
    padding: 8rem;
  }
  section.flow_section .flow_wrap {
    margin: 5.6rem auto 0;
  }
  section.flow_section .flow_wrap .row {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  section.flow_section .flow_wrap .row .pic:after {
    content: "";
    display: block;
    float: none;
    clear: both;
  }
  section.flow_section .flow_wrap .row .pic {
    width: 50%;
  }
  section.flow_section .flow_wrap .row .pic img {
    width: 116%;
  }
  section.flow_section .flow_wrap .row .texts {
    width: calc(50% - 8rem);
  }
  section.flow_section .flow_wrap .row .texts:before {
    content: "";
    display: block;
    position: absolute;
    z-index: -1;
    width: 32rem;
    height: 23.8rem;
    background: url(/files/user/mirai-eye/images/common/bg_brush.png) center/contain no-repeat;
    left: -10rem;
    top: -8rem;
  }
  section.flow_section .flow_wrap .row .texts .row_title {
    font-weight: 500;
    font-size: 4.8rem;
    line-height: 1.25;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 1.6rem;
    margin-bottom: 2.4rem;
  }
  section.flow_section .flow_wrap .row .texts .row_title .num {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 5.4rem;
    aspect-ratio: 1;
    border-radius: 2.7rem;
    background: #F6AB00;
    color: #fff;
    font-family: "Lexend", sans-serif;
    font-optical-sizing: auto;
    font-weight: 500;
    font-style: normal;
    font-size: 2.8rem;
  }
  section.flow_section .flow_wrap .row .texts .row_text {
    color: #FF8800;
    margin-bottom: 1.6rem;
    font-weight: 500;
    font-size: 2.4rem;
    letter-spacing: 0.07em;
  }
  section.flow_section .flow_wrap .row .texts ul {
    margin-top: 2.4rem;
    display: flex;
    width: 100%;
    justify-content: flex-start;
    align-items: center;
    gap: 1.6rem;
  }
  section.flow_section .flow_wrap .row .texts ul li {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    width: fit-content;
    font-weight: 500;
    font-size: 1.6rem;
    padding-left: 2.4rem;
    background: url(/files/user/mirai-eye/images/common/icon_check.svg) left center/2rem auto no-repeat;
  }
  section.flow_section .flow_wrap .row + .row {
    margin-top: 8rem;
  }
  section.flow_section .flow_wrap .row:nth-child(odd) {
    flex-direction: row-reverse;
  }
  section.flow_section .flow_wrap .row:nth-child(even) .pic img {
    float: right;
  }
  section.lrn_section .inner_wrap {
    background: #E8F3FF;
    border-radius: 2.4rem;
    padding: 8rem 8rem;
  }
  section.lrn_section .lrn_title {
    margin-top: 4rem;
    font-size: 2.8rem;
    margin-bottom: 4rem;
  }
  section.lrn_section .lrn_title small {
    margin-bottom: 2.4rem;
  }
  section.lrn_section .lrn_title .logo_wrap {
    display: flex;
    width: 100%;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-bottom: 1.6rem;
  }
  section.lrn_section .lrn_title .logo_wrap img {
    display: block;
  }
  section.lrn_section .lrn_title .logo_wrap img:first-child {
    width: 19rem;
  }
  section.lrn_section .lrn_title .logo_wrap img:last-child {
    width: 32rem;
  }
  section.lrn_section .lrn_title .logo_wrap .x {
    display: block;
    width: 3rem;
    height: 3rem;
  }
  section.lrn_section .lrn_title .logo_wrap .x:before, section.lrn_section .lrn_title .logo_wrap .x:after {
    content: "";
    display: block;
    position: absolute;
    width: 4rem;
    height: 2px;
    background: #000;
    left: 50%;
    top: 50%;
    transform-origin: center;
    transform: translate(-50%, -50%) rotate(45deg);
  }
  section.lrn_section .lrn_title .logo_wrap .x:after {
    transform: translate(-50%, -50%) rotate(-45deg);
  }
  section.lrn_section .whats_wrap {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-direction: row-reverse;
  }
  section.lrn_section .whats_wrap .pic {
    width: 50rem;
  }
  section.lrn_section .whats_wrap .pic a {
    transition: opacity 0.2s ease;
  }
  section.lrn_section .whats_wrap .pic a:hover {
    opacity: 0.6;
  }
  section.lrn_section .whats_wrap .pic a {
    display: block;
    width: fit-content;
    margin: 2.4rem auto 0;
    color: #0080B7;
    font-size: 1.4rem;
    text-decoration: underline;
  }
  section.lrn_section .whats_wrap .texts {
    width: 50rem;
  }
  section.lrn_section .whats_wrap .texts h4 {
    margin-bottom: 1.6rem;
    color: #0080B7;
    font-weight: 500;
    font-size: 2.4rem;
  }
  section.lrn_section .whats_wrap .texts .btn {
    margin: 4rem 0 0;
    background-color: #0080B7;
    border-color: #0080B7;
  }
  section.lrn_section .whats_wrap .texts .btn .icon:before {
    background: url(/files/user/mirai-eye/images/common/icon_blank_life.svg) center/1.6rem auto no-repeat #fff;
  }
  section.lrn_section .whats_wrap .texts .btn .icon:after {
    background: url(/files/user/mirai-eye/images/common/icon_blank_wh.svg) center/1.6rem auto no-repeat #0080B7;
  }
  section.lrn_section .whats_wrap .texts .btn:hover {
    background-color: #fff;
    color: #0080B7;
  }
  section.lrn_section .devices {
    border-radius: 4rem;
    background: #fff;
    width: 100%;
    margin: 4rem auto 0;
    padding: 2.4rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    align-items: flex-start;
    text-align: center;
    gap: 1.6rem;
  }
  section.lrn_section .devices h4 {
    width: 100%;
    font-weight: 500;
    color: #0080B7;
    font-size: 3.2rem;
    line-height: 1.25;
  }
  section.lrn_section .devices .text {
    width: 100%;
    margin: -0.8rem auto 0.8rem;
    font-weight: 500;
  }
  section.lrn_section .devices .col {
    width: 12.8rem;
  }
  section.lrn_section .devices .col p {
    margin-top: 1.6rem;
    font-size: 1.4rem;
    padding-bottom: 1rem;
  }
  section.video_section .video_wrap {
    margin: 5.6rem auto 0;
    width: 80rem;
    height: 48rem;
    overflow: hidden;
  }
  section.video_section iframe {
    display: block;
    width: auto;
    height: auto;
    min-width: 100%;
    min-height: 100%;
    border: 0;
    object-fit: cover;
  }
  .back_top {
    padding: 8rem;
  }
  .back_top .btn {
    background-color: #F6AB00;
    border-color: #F6AB00;
  }
  .back_top .btn .arrow:before {
    filter: brightness(1.2);
  }
  .back_top .btn .arrow:after {
    background-color: #F6AB00;
  }
  .back_top .btn:hover {
    background-color: #fff;
    color: #F6AB00;
  }
}
@media screen and (max-width: 768px) {
  section.head_section {
    padding-top: 4rem;
    padding-bottom: 29.4rem;
    border-radius: 0 0 4rem 4rem;
    background: url(/files/user/mirai-eye/images/common/qfd_10a_left.png) center calc(100% - 9rem)/auto 20rem no-repeat #FFF3D6;
  }
  section.head_section h1 {
    font-weight: 500;
    font-size: 4rem;
    line-height: 1.25;
  }
  section.head_section .sub {
    margin-top: 0.8rem;
    font-weight: 500;
    font-size: 1.4rem;
  }
  section.head_section .tais {
    width: fit-content;
    position: absolute;
    right: 0;
    font-size: 1rem;
    margin-top: 21rem;
    font-weight: 500;
  }
  section.intro_section {
    background: url(/files/user/mirai-eye/images/common/bg_orange_sp.png) center top/100% auto no-repeat;
    padding: 8rem 0;
  }
  section.intro_section .deco {
    position: absolute;
    z-index: 1;
  }
  section.intro_section .deco.deco1 {
    width: 4.12rem;
    right: calc(50% + 10.2rem);
    top: -5rem;
  }
  section.intro_section .deco.deco2 {
    width: 4rem;
    left: calc(50% + 10.3rem);
    top: -5rem;
  }
  section.intro_section .deco.deco3 {
    width: 6.4rem;
    right: calc(50% + 5.4rem);
    bottom: -3.6rem;
  }
  section.intro_section .deco.deco4 {
    width: 7.2rem;
    left: calc(50% + 4.7rem);
    bottom: -4.3rem;
  }
  section.intro_section .intro_ttl {
    width: fit-content;
    margin: 0 auto 2.4rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.8rem;
    font-weight: 500;
    font-size: 2rem;
  }
  section.intro_section .intro_ttl img {
    width: 28rem;
  }
  section.intro_section .text {
    line-height: 2;
    text-align: left;
  }
  section.intro_section .text .row {
    display: block;
  }
  section.intro_section .text .row + .row {
    margin-top: 1.6rem;
  }
  section.features_section .bg_wrap {
    margin: 4rem auto 0;
    width: 100%;
    padding: 4rem 2.4rem;
    background: #fff;
    border-radius: 2.4rem;
  }
  section.features_section .features_wrap {
    background: #FFFBD3;
    border-radius: 2.4rem;
    padding: 2.4rem 1.6rem 1.6rem;
  }
  section.features_section .features_wrap .col {
    margin: 0 auto;
  }
  section.features_section .features_wrap .col .pic {
    width: 100%;
    margin: 0 auto 1.6rem;
  }
  section.features_section .features_wrap .col .col_title {
    display: flex;
    width: 100%;
    justify-content: flex-start;
    align-items: center;
    font-weight: 500;
    font-size: 2rem;
    color: #FF8800;
    padding-bottom: 0.8rem;
    border-bottom: #FF8800 1px solid;
    gap: 0.8rem;
    margin-bottom: 0.8rem;
  }
  section.features_section .features_wrap .col .col_title .label {
    display: flex;
    width: 5.6rem;
    height: 2.6rem;
    border-radius: 0.8rem;
    background: #FF8800;
    color: #fff;
    font-size: 1.2rem;
    justify-content: center;
    align-items: center;
  }
  section.features_section .features_wrap .col .col_text {
    font-weight: 500;
    font-size: 2rem;
  }
  section.features_section .features_wrap .col .text {
    margin-top: 0.8rem;
  }
  section.features_section .features_wrap .col .text .note {
    display: block;
    margin-top: 0.4rem;
    font-size: 1.2rem;
  }
  section.features_section .features_wrap .col + .col {
    margin-top: 2.4rem;
  }
  section.features_section .functions_wrap {
    width: 100%;
    margin: 0 auto 0;
    padding: 0 1.6rem;
  }
  section.features_section .functions_wrap .col {
    padding: 0 0 1.6rem;
    margin: 0 auto;
  }
  section.features_section .functions_wrap .col:nth-child(n+2) {
    border-top: #DEDEDE 1px solid;
    padding-top: 1.6rem;
  }
  section.features_section .functions_wrap .col .col_title {
    text-align: center;
    font-weight: 500;
    font-size: 2rem;
    margin-bottom: 1.6rem;
  }
  section.features_section .functions_wrap .col .pic {
    margin: 0 auto 1.6rem;
  }
  section.features_section .functions_wrap .col .pic:not(.pic_w) img {
    width: 120%;
    left: 50%;
    transform: translateX(-50%);
  }
  section.features_section .functions_wrap .col .text {
    font-size: 1.2rem;
  }
  section.features_section .functions_wrap .col .note {
    display: block;
    font-size: 1.2rem;
    margin-top: 0.4rem;
  }
  section.features_section .scene {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    margin: 4rem auto 0;
    flex-wrap: wrap;
    text-align: center;
    gap: 2.4rem;
  }
  section.features_section .scene h3 {
    width: 100%;
    font-weight: 500;
    font-size: 2.4rem;
    margin-bottom: -0.8rem;
  }
  section.features_section .scene .text {
    width: 100%;
  }
  section.features_section .scene .col {
    width: 16.3rem;
  }
  section.features_section .scene .col .pic {
    width: 100%;
    border-radius: 50%;
    background: #fff;
  }
  section.features_section .scene .col .col_text {
    margin-top: 1.6rem;
    font-weight: 500;
    font-size: 1.6rem;
  }
  section.flow_section {
    background: url(/files/user/mirai-eye/images/common/bg_orange_sp.png) center top/100% auto no-repeat;
  }
  section.flow_section .flow_wrap {
    margin: 4rem auto 0;
  }
  section.flow_section .flow_wrap .row .pic {
    margin: 0 auto 2.4rem;
  }
  section.flow_section .flow_wrap .row .texts:before {
    content: "";
    display: block;
    position: absolute;
    z-index: -1;
    width: 24rem;
    height: 17.9rem;
    background: url(/files/user/mirai-eye/images/common/bg_brush.png) center/contain no-repeat;
    left: -8rem;
    top: -6rem;
  }
  section.flow_section .flow_wrap .row .texts .row_title {
    font-weight: 500;
    font-size: 2.8rem;
    line-height: 1.25;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 1.6rem;
    margin-bottom: 1.6rem;
  }
  section.flow_section .flow_wrap .row .texts .row_title .num {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 4rem;
    aspect-ratio: 1;
    border-radius: 2rem;
    background: #F6AB00;
    color: #fff;
    font-family: "Lexend", sans-serif;
    font-optical-sizing: auto;
    font-weight: 500;
    font-style: normal;
    font-size: 2rem;
  }
  section.flow_section .flow_wrap .row .texts .row_text {
    color: #FF8800;
    margin-bottom: 1.6rem;
    font-weight: 500;
    font-size: 1.8rem;
  }
  section.flow_section .flow_wrap .row .texts ul {
    margin-top: 1.6rem;
    display: flex;
    width: 100%;
    justify-content: flex-start;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.8rem 1.6rem;
  }
  section.flow_section .flow_wrap .row .texts ul li {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    width: fit-content;
    font-weight: 500;
    font-size: 1.4rem;
    padding-left: 2.4rem;
    background: url(/files/user/mirai-eye/images/common/icon_check.svg) left center/2rem auto no-repeat;
  }
  section.flow_section .flow_wrap .row + .row {
    margin-top: 5.6rem;
  }
  section.lrn_section .inner_wrap {
    background: #E8F3FF;
    border-radius: 4rem;
    padding: 4rem 2.4rem;
  }
  section.lrn_section .lrn_title {
    margin-top: 2.4rem;
    font-size: 2rem;
    margin-bottom: 2.4rem;
  }
  section.lrn_section .lrn_title small {
    margin-bottom: 1.6rem;
  }
  section.lrn_section .lrn_title .logo_wrap {
    display: flex;
    width: 100%;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.8rem;
  }
  section.lrn_section .lrn_title .logo_wrap img {
    display: block;
  }
  section.lrn_section .lrn_title .logo_wrap img:first-child {
    width: 9.9rem;
  }
  section.lrn_section .lrn_title .logo_wrap img:last-child {
    width: 16.65rem;
  }
  section.lrn_section .lrn_title .logo_wrap .x {
    display: block;
    width: 1.5rem;
    height: 1.5rem;
  }
  section.lrn_section .lrn_title .logo_wrap .x:before, section.lrn_section .lrn_title .logo_wrap .x:after {
    content: "";
    display: block;
    position: absolute;
    width: 2rem;
    height: 1px;
    background: #000;
    left: 50%;
    top: 50%;
    transform-origin: center;
    transform: translate(-50%, -50%) rotate(45deg);
  }
  section.lrn_section .lrn_title .logo_wrap .x:after {
    transform: translate(-50%, -50%) rotate(-45deg);
  }
  section.lrn_section .whats_wrap .pic a {
    transition: opacity 0.2s ease;
  }
  section.lrn_section .whats_wrap .pic a:hover {
    opacity: 0.6;
  }
  section.lrn_section .whats_wrap .pic a {
    display: block;
    width: fit-content;
    margin: 1.6rem auto 0;
    color: #0080B7;
    font-size: 1.2rem;
    text-decoration: underline;
  }
  section.lrn_section .whats_wrap .texts {
    margin-top: 2.4rem;
  }
  section.lrn_section .whats_wrap .texts h4 {
    margin-bottom: 1.6rem;
    color: #0080B7;
    font-weight: 500;
    font-size: 1.8rem;
  }
  section.lrn_section .whats_wrap .texts .btn {
    margin: 2.4rem auto 0;
    background-color: #0080B7;
    border-color: #0080B7;
  }
  section.lrn_section .whats_wrap .texts .btn .icon:before {
    background: url(/files/user/mirai-eye/images/common/icon_blank_life.svg) center/1.6rem auto no-repeat #fff;
  }
  section.lrn_section .devices {
    border-radius: 4rem;
    background: #fff;
    width: 100%;
    margin: 4rem auto 0;
    padding: 2.4rem 1.6rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    align-items: flex-start;
    text-align: center;
    gap: 1.6rem 0.8rem;
  }
  section.lrn_section .devices h4 {
    width: 100%;
    font-weight: 500;
    color: #0080B7;
    font-size: 2rem;
  }
  section.lrn_section .devices .text {
    width: 100%;
    margin: -0.8rem auto 0.8rem;
    font-weight: 500;
  }
  section.lrn_section .devices .col {
    width: 8.4rem;
    width: calc(33.3333333333% - 0.5333333333rem);
  }
}
@media screen and (max-width: 768px) and (min-width: 480px) {
  section.lrn_section .devices .col {
    width: calc(25% - 0.6rem);
  }
}
@media screen and (max-width: 768px) and (min-width: 664px) {
  section.lrn_section .devices .col {
    width: calc(20% - 0.64rem);
  }
}
@media screen and (max-width: 768px) {
  section.lrn_section .devices .col p {
    margin-top: 1.6rem;
    font-size: 1rem;
  }
  section.video_section .video_wrap {
    margin: 4rem auto 0;
    width: 100%;
    height: calc((100vw - 4rem) * 48 / 80);
    overflow: hidden;
  }
  section.video_section iframe {
    display: block;
    width: auto;
    height: auto;
    min-width: 100%;
    min-height: 100%;
    border: 0;
    object-fit: cover;
  }
  .back_top {
    padding: 6.4rem 0 10.4rem;
  }
  .back_top .btn {
    background-color: #F6AB00;
    border-color: #F6AB00;
  }
  .back_top .btn .arrow:before {
    background-color: #F6AB00;
  }
  .back_top .btn .arrow:after {
    filter: brightness(1.2);
  }
}