@charset "UTF-8";
html,
body {
  scroll-behavior: smooth;
}

:root {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Yu Gothic", sans-serif;
  font-feature-settings: "palt" 1;
}

@media screen and (min-width: 768px) {
  .pc {
    display: block;
  }
  .sp {
    display: none;
  }
  .container {
    max-width: 1080px;
    margin: 0 auto;
  }
  .container .section-title {
    width: 100%;
    text-align: center;
    font-family: serif;
    position: relative;
    padding-bottom: 24px;
  }
  .container .section-title ::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: calc(50% - 50vw);
    right: 0;
    height: 12px;
    background: linear-gradient(45deg, #003f73 10%, #737eef 100%);
  }
  .container .section-title h1 {
    font-size: 4rem;
    line-height: 1.3em;
    letter-spacing: 0.1em;
  }
  .btn_wrap {
    display: inline-block;
    background: yellow;
    color: #fff;
  }
  .btn_wrap a {
    display: inline-block;
    padding: 1em 3em;
    transition: 0.3s all linear;
  }
  .btn_wrap a:hover {
    background: yellow;
  }
}
/*------------------------------------------
  共通
-------------------------------------------*/
@media screen and (max-width: 767px) {
  .pc {
    display: none !important;
  }
  .sp {
    display: block !important;
  }
  .container {
    width: 100%;
    padding-left: 20px;
    padding-right: 20px;
    box-sizing: border-box;
  }
  .container .section-title {
    text-align: center;
    font-family: serif;
    position: relative;
    padding-bottom: 16px;
  }
  .container .section-title::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(45deg, #003f73 10%, #737eef 100%);
  }
  .container .section-title h1 {
    font-size: 2rem;
    line-height: 1.3em;
    letter-spacing: 0.05em;
  }
}
/*-----------------------------------------------
  ページトップボタン
-----------------------------------------------*/
.back-to-top {
  display: none;
  position: fixed;
  right: 2%;
  bottom: 2%;
  color: rgba(255, 255, 255, 0.8);
  padding: 2rem;
  display: inline-block;
  text-decoration: none;
  border-radius: 50%;
  font-size: 0.9rem;
  line-height: 1em;
}

.back-to-top::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: inline-block;
  width: 70px;
  height: 70px;
  background-color: rgba(255, 255, 255, 0.4);
  border-radius: 50%;
  z-index: -1;
}

/*-------------------------------------
  フッター
--------------------------------------*/
footer {
  background: #000000;
  color: #fff;
  text-align: center;
  font-size: 0.8rem;
  padding: 0.3em;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  pointer-events: none;
}
header .header-inner {
  width: 100%;
  pointer-events: auto;
}
header .header-inner .logo {
  width: 420px;
  padding: 16px 60px 16px 24px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(4px);
  clip-path: polygon(0 0, 100% 0, 82% 100%, 0 100%);
}
header .header-inner .logo img {
  width: 100%;
  height: auto;
  display: block;
}
@media (max-width: 767px) {
  header .header-inner .logo {
    display: none;
  }
}

/* スクロール追従ボタン（画像右端のデザイン） */
.fixed-btn-wrap {
  position: fixed;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s ease;
}
@media (min-width: 768px) {
  .fixed-btn-wrap {
    right: 0;
    top: 20%;
    transform: translateX(100%);
  }
  .fixed-btn-wrap.is-show {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
  }
  .fixed-btn-wrap .fixed-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 36px 12px;
    color: #fff;
    background: linear-gradient(to bottom, transparent 50%, rgba(0, 0, 0, 0.15) 50%), linear-gradient(to top, #002b66 0%, #3e51cd 50%, #6879fa 100%);
    text-decoration: none;
    border: 1.5px solid #fff;
    border-right: none;
    border-radius: 7px 0 0 7px;
    box-shadow: -2px 4px 12px rgba(0, 0, 0, 0.25);
    writing-mode: vertical-rl;
    letter-spacing: 0.15em;
    font-size: 1.1rem;
  }
  .fixed-btn-wrap .fixed-btn:hover {
    filter: brightness(1.15);
  }
}
@media (max-width: 767px) {
  .fixed-btn-wrap {
    left: 0;
    bottom: 0;
    width: 100vw; /* ビューワイドいっぱい */
    padding: 0;
    background: none; /* 周りのグレー背景を解除 */
    backdrop-filter: none;
    box-sizing: border-box;
    transform: translateY(100%);
  }
  .fixed-btn-wrap.is-show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .fixed-btn-wrap .fixed-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100vw;
    padding: 12px 0;
    border-radius: 0;
    box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.3);
    text-decoration: none;
    writing-mode: horizontal-tb;
    letter-spacing: 0.05em;
    background: linear-gradient(to bottom, transparent 50%, rgba(0, 0, 0, 0.15) 50%), linear-gradient(90deg, #002b66 0%, #3e51cd 50%, #6879fa 100%);
  }
  .fixed-btn-wrap .fixed-btn .sp-img {
    width: 200px;
    margin-top: 1.5px;
    margin-left: 5px;
  }
}

#kv {
  width: 100%;
  min-height: 100vh;
  background: url(../images/bg_main.webp);
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center bottom;
  display: flex;
  justify-content: center;
  align-items: center;
  filter: drop-shadow(0 15px 30px #000000);
}
#kv .kv-wrapper {
  max-width: 1200px;
  margin: 0 auto;
}
#kv .kv-wrapper img {
  width: 100%;
  height: auto;
  padding-top: 40px;
}
@media (max-width: 767px) {
  #kv {
    min-height: auto;
    padding: 0 0 0;
    background: linear-gradient(to top, #000000 20%, #fff 20%, #fff 100%);
  }
  #kv .kv-wrapper {
    padding: 0 0;
  }
  #kv .kv-wrapper img {
    padding-top: 20px;
  }
}

#crucible {
  width: 100%;
  background: url(../images/bg_crucible.webp);
  background-size: contain;
  background-repeat: repeat;
}
#crucible .crucible-title {
  width: 100%;
  background: url(../images/bg_crucible-title.webp);
  background-repeat: no-repeat;
  background-size: contain;
  background-position: top center;
}
#crucible .crucible-title .wrapper {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
#crucible .crucible-title .wrapper img {
  width: 65%;
  height: auto;
  margin: 10rem auto 8rem auto;
}
#crucible .crucible-wrap {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  text-align: left;
  font-family: serif;
}
#crucible .crucible-wrap .text-wrap {
  margin: 12rem auto;
}
#crucible .crucible-wrap .text-wrap h1 {
  font-size: 4rem;
  line-height: 1.3em;
  letter-spacing: 0.1em;
  padding-bottom: 1.5rem;
}
#crucible .crucible-wrap .text-wrap p {
  font-size: 1.8rem;
  line-height: 1.8em;
  letter-spacing: 0.2em;
}
#crucible .crucible-wrap {
  background-position: left bottom, right bottom;
  background-repeat: no-repeat, no-repeat;
}
#crucible .crucible01 {
  background-image: url(../images/crucible01_left.webp), url(../images/crucible01_right.webp);
  background-size: 60% auto, 40% auto;
}
#crucible .crucible02 {
  background-image: url(../images/crucible02_left.webp), url(../images/crucible02_right.webp);
  background-position: left bottom 37%, right top 25%;
  background-size: 40% auto, 40% auto;
}
#crucible .crucible03 {
  background-image: url(../images/crucible03_left.webp), url(../images/crucible03_right.webp);
  background-size: 55% auto, 40% auto;
}
#crucible .crucible04 {
  background-image: url(../images/crucible04_left.webp), url(../images/crucible04_right.webp);
  background-position: left bottom, right bottom 10%;
  background-size: 45% auto, 40% auto;
}
#crucible .message {
  width: 100%;
  background: url(../images/bg_crucible02.webp);
  background-size: cover;
  background-position: center bottom;
  background-repeat: no-repeat;
  text-align: center;
  padding: 15rem 0;
}
#crucible .message h1 {
  width: 100%;
  padding-bottom: 3rem;
}
#crucible .message h1 img {
  width: 80%;
  margin: 0 auto;
}
#crucible .message p {
  width: 100%;
}
#crucible .message p img {
  width: 70%;
  margin: 0 auto;
}
@media (max-width: 767px) {
  #crucible {
    background-size: cover;
  }
  #crucible .crucible-title .wrapper img {
    width: 85%;
    margin: 4rem auto;
    padding-left: 1rem;
  }
  #crucible .crucible-wrap .text-wrap {
    margin: 7rem auto;
    padding: 0 20px;
  }
  #crucible .crucible-wrap .text-wrap h1 {
    font-size: 2rem;
    padding-bottom: 1rem;
  }
  #crucible .crucible-wrap .text-wrap p {
    font-size: 1.2rem;
    line-height: 1.6em;
    letter-spacing: 0.1em;
  }
  #crucible .crucible01 {
    background-position: left bottom 0, right top -80%;
    background-size: 80% auto, 60% auto;
  }
  #crucible .crucible02 {
    background-position: left -10% bottom -60%, right top 20%;
    background-size: 70% auto, 75% auto;
  }
  #crucible .crucible03 {
    background-position: left -10% bottom, right top -30%;
    background-size: 80% auto, 60% auto;
  }
  #crucible .crucible04 {
    background-position: left -40% top -30%, right bottom 10%;
    background-size: 80% auto, 60% auto;
  }
  #crucible .message {
    padding: 6rem 0;
  }
  #crucible .message h1 img {
    width: 100%;
  }
  #crucible .message p img {
    width: 85%;
    margin: 0 auto;
  }
}

#t2d3model {
  width: 100%;
  padding: 10rem 0 5rem;
  background: url(../images/bg_t2d3model.webp) no-repeat right bottom;
  background-size: contain;
}
#t2d3model .container {
  max-width: 980px;
  margin: 0 auto;
}
#t2d3model .container .wrapper {
  width: 100%;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 5rem;
}
#t2d3model .container .wrapper p {
  font-family: serif;
  font-size: 2.8rem;
  line-height: 1.8em;
  letter-spacing: 0.1em;
}
#t2d3model .container .wrapper img {
  width: 260px;
  height: auto;
  margin-top: -50px;
}
#t2d3model .container .explanation-wrap {
  width: 100%;
  position: relative;
  padding-bottom: 12rem;
}
#t2d3model .container .explanation-wrap .equation {
  display: inline-block;
  background: linear-gradient(to right, #737eef 20%, #0e1b2e 100%);
  color: #fff;
  font-size: 1.7rem;
  padding: 0.5em 1.5em;
  letter-spacing: 0.15em;
  margin-top: 2rem;
  position: relative;
  z-index: 2;
}
#t2d3model .container .explanation-wrap .equation span {
  color: #00ffff;
}
#t2d3model .container .explanation-wrap .add {
  line-height: 2em;
  padding-top: 2em;
  position: relative;
  z-index: 2;
}
#t2d3model .container .explanation-wrap .graph {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 800px;
  height: auto;
  z-index: 1;
}
@media (max-width: 767px) {
  #t2d3model {
    background: url(../images/bg_t2d3model_sp.webp) no-repeat left bottom;
    background-size: 100vw 45vh;
    padding: 5rem 0 2rem;
  }
  #t2d3model .container .wrapper {
    flex-direction: column;
    padding-top: 2rem;
    text-align: center;
  }
  #t2d3model .container .wrapper p {
    text-align: left;
    font-size: 1.4rem;
    line-height: 1.6em;
  }
  #t2d3model .container .wrapper img {
    width: 180px;
    margin-top: 20px;
  }
  #t2d3model .container .explanation-wrap {
    padding-bottom: 0;
    position: relative;
  }
  #t2d3model .container .explanation-wrap .equation {
    font-size: 1.4rem;
    padding: 0.5em 1em;
    line-height: 1.5em;
    width: 100%;
    text-align: center;
  }
  #t2d3model .container .explanation-wrap .add {
    position: absolute;
    top: 9rem;
    font-size: 0.9rem;
    line-height: 1.8em;
    padding-top: 2.5em;
  }
  #t2d3model .container .explanation-wrap .graph {
    position: relative;
    width: 103%;
    margin-top: 20px;
  }
}

#flow {
  width: 100%;
  padding: 10rem 0 0;
  background-image: linear-gradient(to top, transparent 35%, #fff 35%), linear-gradient(#1e345c 0%, #0e1b2e 70%, #0d1a2c 100%);
}
#flow .container {
  max-width: 900px;
  margin: 0 auto;
}
#flow .container .img-list {
  width: 100%;
  padding-top: 6rem;
}
#flow .container .img-list figure {
  width: 100%;
  margin: 0 auto;
  display: flex;
  justify-content: center;
}
#flow .container .img-list figure img {
  width: 100%;
  margin-bottom: 4rem;
  filter: drop-shadow(0 2px 4px rgba(15, 23, 42, 0.6)) drop-shadow(0 8px 16px rgba(15, 23, 42, 0.6));
}
#flow .container .img-list figure .card {
  width: 110%;
}
#flow .components {
  background: #fff;
  padding: 3rem 0;
}
#flow .components h3 {
  display: inline-block;
  width: 100%;
  text-align: center;
  font-family: serif;
  font-size: 1.1rem;
  padding: 0.5rem 1rem;
  border: 1px solid #000;
  border-radius: 100px;
}
#flow .components p {
  font-size: 1.2rem;
  line-height: 5em;
  font-weight: 500;
  text-align: center;
}
#flow .components figure {
  width: 100%;
}
#flow .components figure img {
  width: 100%;
}
@media (max-width: 767px) {
  #flow {
    padding: 5rem 0 0;
    background-image: linear-gradient(to top, transparent 60%, #fff 60%), linear-gradient(#1e345c 0%, #0e1b2e 70%, #0d1a2c 100%);
  }
  #flow .container .img-list {
    padding-top: 3rem;
  }
  #flow .container .img-list figure img {
    margin-bottom: 2rem;
  }
  #flow .container .img-list figure .card {
    width: 100%;
  }
  #flow .components {
    padding: 2rem 0;
  }
  #flow .components h3 {
    font-size: 0.95rem;
  }
  #flow .components p {
    font-size: 1.2rem;
    line-height: 4em;
  }
}

#why {
  width: 100%;
  padding: 8rem 0 5rem;
}
#why .container {
  max-width: 980px;
}
#why .container .title-line {
  font-family: serif;
  font-size: 1.6rem;
  line-height: 5em;
  letter-spacing: 0.1em;
  text-align: center;
}
#why .container .scene-list {
  width: 100%;
}
#why .container .scene-list .scene-wrap {
  width: 100%;
  margin: 0 auto;
}
#why .container .scene-list .scene-wrap .banner {
  margin-top: 3rem;
  position: relative;
  width: 100%;
  padding: 40px 0;
  background: radial-gradient(circle at center, #f5f5f7 0%, #e2e2e8 100%);
  overflow: hidden;
}
#why .container .scene-list .scene-wrap .banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 35%;
  height: 100%;
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  z-index: 1;
}
#why .container .scene-list .scene-wrap .banner.banner01::before {
  background-image: url(../images/why01.webp);
}
#why .container .scene-list .scene-wrap .banner.banner02::before {
  background-image: url(../images/why02.webp);
}
#why .container .scene-list .scene-wrap .banner.banner03::before {
  background-image: url(../images/why03.webp);
}
#why .container .scene-list .scene-wrap .banner.banner04::before {
  background-image: url(../images/why04.webp);
}
#why .container .scene-list .scene-wrap .banner .banner-row {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: flex-start;
  width: 100%;
}
#why .container .scene-list .scene-wrap .banner .banner-row .col-left {
  width: 35%;
  flex-shrink: 0;
  position: relative;
}
#why .container .scene-list .scene-wrap .banner .banner-row .col-right {
  flex: 1;
  padding-left: 20px;
}
#why .container .scene-list .scene-wrap .banner .row-top {
  margin-bottom: 24px;
}
#why .container .scene-list .scene-wrap .banner .row-top .col-right {
  font-family: serif;
  padding-bottom: 18px;
  letter-spacing: 0.05em;
}
#why .container .scene-list .scene-wrap .banner .row-top .col-right h2 {
  font-size: 2rem;
  line-height: 1.3em;
  border-bottom: 1px solid #737eef;
  padding-bottom: 0.5em;
  margin-bottom: 0.5em;
}
#why .container .scene-list .scene-wrap .banner .row-top .col-right .catch {
  font-size: 1.3rem;
  text-align: left;
}
#why .container .scene-list .scene-wrap .banner .row-bottom .col-left .scene-badge {
  margin-top: 14px;
  position: absolute;
  left: -20px;
  top: 50%;
  transform: translateY(-50%);
  width: calc(100% + 20px);
  height: 35px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 35px;
  background: #0f1056;
  color: #fff;
  letter-spacing: 0.1em;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 50%, calc(100% - 16px) 100%, 0 100%);
}
#why .container .scene-list .scene-wrap .banner .row-bottom .col-right .scene {
  color: #120e6a;
}
#why .container .scene-list .scene-wrap .banner .row-bottom .col-right .scene li:first-child {
  font-size: 1.6rem;
  font-family: serif;
}
#why .container .scene-list .scene-wrap .banner .row-bottom .col-right .scene li:first-child .material-symbols-outlined {
  width: 1.5rem;
  margin-right: 0.3rem;
  position: relative;
  top: 3px;
}
#why .container .scene-list .scene-wrap .banner .row-bottom .col-right .scene li:nth-child(2) {
  font-size: 1.05rem;
  line-height: 1.4em;
  padding-top: 0.8em;
  letter-spacing: 0.05em;
}
@media (max-width: 767px) {
  #why {
    padding: 4rem 0 3rem;
  }
  #why .container .title-line {
    font-size: 1.1rem;
    line-height: 3em;
  }
  #why .container .scene-list .scene-wrap .banner {
    padding: 0 0 20px; /* ★親要素（.banner）の左右パディングを0にする */
    margin-top: 2rem;
    overflow: hidden; /* ★はみ出た部分を綺麗にカット */
  }
  #why .container .scene-list .scene-wrap .banner::before {
    content: "";
    width: 100%;
    height: 70px;
    position: relative;
    display: block;
    margin-bottom: 1.5rem;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: right center;
    clip-path: none;
  }
  #why .container .scene-list .scene-wrap .banner .banner-row {
    flex-direction: column;
  }
  #why .container .scene-list .scene-wrap .banner .banner-row .col-left {
    width: 100%;
  }
  #why .container .scene-list .scene-wrap .banner .banner-row .col-right {
    padding-left: 1rem;
    padding-right: 1rem;
    width: 100%;
  }
  #why .container .scene-list .scene-wrap .banner .row-top {
    margin-bottom: 16px;
  }
  #why .container .scene-list .scene-wrap .banner .row-top .col-right h2 {
    display: inline-block;
    width: 100%;
    font-size: 1.6rem;
    line-height: 1.4em;
  }
  #why .container .scene-list .scene-wrap .banner .row-top .col-right .catch {
    font-size: 1.2rem;
    line-height: 1.4em;
  }
  #why .container .scene-list .scene-wrap .banner .row-bottom .col-left .scene-badge {
    position: relative;
    top: 0;
    transform: none;
    width: 90%;
    height: 30px;
    margin: 0 0 12px 0;
    padding-right: 15px;
    padding-left: 2.5rem;
    font-size: 0.8rem;
    justify-content: flex-start;
  }
  #why .container .scene-list .scene-wrap .banner .row-bottom .col-right .scene li:first-child {
    font-size: 1.2rem;
  }
  #why .container .scene-list .scene-wrap .banner .row-bottom .col-right .scene li:nth-child(2) {
    font-size: 0.95rem;
  }
}

#contact {
  width: 100%;
  padding: 5rem 0 3rem;
  background: url(../images/bg_contact.webp);
  background-repeat: no-repeat;
  background-position: center bottom;
  background-size: 100vw;
}
#contact .container {
  width: 100%;
}
#contact .container h1 {
  width: 100%;
  text-align: center;
  padding-bottom: 3rem;
}
#contact .container h1 .lastmessage {
  width: 80%;
  margin: 0 auto;
}
#contact .container .btn-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  width: 100%;
  margin: 0 auto;
}
#contact .container .btn-wrap .monitor {
  width: 40%;
}
#contact .container .btn-wrap .monitor img {
  width: 100%;
  height: auto;
  display: block;
}
#contact .container .btn-wrap .btn {
  width: 45%;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 22px 32px;
  border-radius: 12px;
  border: 2px solid #ffffff;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  text-decoration: none;
  transition: filter 0.3s ease;
  background: linear-gradient(to bottom, transparent 50%, rgba(0, 0, 0, 0.15) 50%), linear-gradient(90deg, #002b66 0%, #3e51cd 50%, #6879fa 100%);
}
#contact .container .btn-wrap .btn img {
  width: 100%;
  max-width: 280px;
  height: auto;
  display: block;
}
#contact .container .btn-wrap .btn {
  /* ホバー時はカラー（明度）のみを素早く明るく変更 */
}
#contact .container .btn-wrap .btn:hover {
  filter: brightness(1.2);
}
#contact .container .btn-wrap {
  /* スマホ対応 */
}
@media (max-width: 768px) {
  #contact .container .btn-wrap {
    flex-direction: column;
    gap: 20px;
  }
  #contact .container .btn-wrap .monitor,
  #contact .container .btn-wrap .btn {
    width: 100%;
    max-width: 100%;
  }
}
@media (max-width: 767px) {
  #contact {
    padding: 2rem 0 4rem;
  }
  #contact .container h1 {
    padding-bottom: 1.5rem;
  }
  #contact .container h1 .lastmessage {
    width: 95%;
    margin: 0 auto;
  }
  #contact .container .btn-wrap {
    flex-direction: column;
    gap: 20px;
  }
  #contact .container .btn-wrap .monitor {
    width: 90%;
  }
  #contact .container .btn-wrap .btn {
    display: none;
  }
}