/*!
 * Bootstrap Reboot v4.1.1 (https://getbootstrap.com/)
 * Copyright 2011-2018 The Bootstrap Authors
 * Copyright 2011-2018 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * Forked from Normalize.css, licensed MIT (https://github.com/necolas/normalize.css/blob/master/LICENSE.md)
 */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-family: sans-serif;
  line-height: 1.15;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  -ms-overflow-style: scrollbar;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
article, aside, figcaption, figure, footer, header, hgroup, main, nav, section {
  display: block;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  font-size: 1rem;
  font-weight: 400;
  line-height: 1;
  color: #212529;
  text-align: left;
  background-color: #fff;
}

[tabindex="-1"]:focus {
  outline: 0 !important;
}

hr {
  box-sizing: content-box;
  height: 0;
  overflow: visible;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
}

p {
  margin: 0;
}

abbr[title],
abbr[data-original-title] {
  text-decoration: underline;
  -webkit-text-decoration: underline dotted;
  text-decoration: underline dotted;
  cursor: help;
  border-bottom: 0;
}

address {
  margin-bottom: 1rem;
  font-style: normal;
  line-height: inherit;
}

ol,
ul,
dl {
  margin: 0;
  padding: 0;
}

ol ol,
ul ul,
ol ul,
ul ol {
  margin: 0;
  padding: 0;
}

dt {
  font-weight: 700;
}

dd {
  margin: 0;
  padding: 0;
}

blockquote {
  margin: 0 0 1rem;
}

dfn {
  font-style: italic;
}

b,
strong {
  font-weight: bolder;
}

small {
  font-size: 80%;
}

sub,
sup {
  position: relative;
  font-size: 75%;
  line-height: 0;
  vertical-align: baseline;
}

sub {
  bottom: -0.25em;
}

sup {
  top: -0.5em;
}

a {
  color: #007bff;
  text-decoration: none;
  background-color: transparent;
  -webkit-text-decoration-skip: objects;
}

a:hover {
  color: #0056b3;
  text-decoration: underline;
}

a:not([href]):not([tabindex]) {
  color: inherit;
  text-decoration: none;
}

a:not([href]):not([tabindex]):hover, a:not([href]):not([tabindex]):focus {
  color: inherit;
  text-decoration: none;
}

a:not([href]):not([tabindex]):focus {
  outline: 0;
}

pre,
code,
kbd,
samp {
  font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 1em;
}

pre {
  margin: 0;
  overflow: auto;
  -ms-overflow-style: scrollbar;
}

figure {
  margin: 0;
}

img {
  vertical-align: middle;
  border-style: none;
}

svg:not(:root) {
  overflow: hidden;
  vertical-align: middle;
}

table {
  border-collapse: collapse;
}

caption {
  padding: 0;
  color: #6c757d;
  text-align: left;
  caption-side: bottom;
}

th {
  text-align: inherit;
}

label {
  display: inline-block;
  margin: 0;
}

button {
  border-radius: 0;
}

button:focus {
  outline: 1px dotted;
  outline: 5px auto -webkit-focus-ring-color;
}

input,
button,
select,
optgroup,
textarea {
  margin: 0;
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

button,
input {
  overflow: visible;
}

button,
select {
  text-transform: none;
}

button,
html [type=button],
[type=reset],
[type=submit] {
  -webkit-appearance: button;
}

button::-moz-focus-inner,
[type=button]::-moz-focus-inner,
[type=reset]::-moz-focus-inner,
[type=submit]::-moz-focus-inner {
  padding: 0;
  border-style: none;
}

input[type=radio],
input[type=checkbox] {
  box-sizing: border-box;
  padding: 0;
}

input[type=date],
input[type=time],
input[type=datetime-local],
input[type=month] {
  -webkit-appearance: listbox;
}

textarea {
  overflow: auto;
  resize: vertical;
}

fieldset {
  min-width: 0;
  padding: 0;
  margin: 0;
  border: 0;
}

legend {
  display: block;
  width: 100%;
  max-width: 100%;
  padding: 0;
  margin: 0;
  font-size: 1.5rem;
  line-height: inherit;
  color: inherit;
  white-space: normal;
}

progress {
  vertical-align: baseline;
}

[type=number]::-webkit-inner-spin-button,
[type=number]::-webkit-outer-spin-button {
  height: auto;
}

[type=search] {
  outline-offset: -2px;
  -webkit-appearance: none;
}

[type=search]::-webkit-search-cancel-button,
[type=search]::-webkit-search-decoration {
  -webkit-appearance: none;
}

::-webkit-file-upload-button {
  font: inherit;
  -webkit-appearance: button;
}

output {
  display: inline-block;
}

summary {
  display: list-item;
  cursor: pointer;
}

template {
  display: none;
}

[hidden] {
  display: none !important;
}

html, body {
  font-size: 15px;
  font-family: "jost", sans-serif;
  font-optical-sizing: auto;
  line-height: 1.5;
  letter-spacing: 0.025em;
  font-feature-settings: "halt";
}

button#play {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 999;
}

#main-visual {
  display: block;
  width: 100%;
  aspect-ratio: 16/9;
}
@media (max-width: 600px) {
  #main-visual {
    aspect-ratio: 9/16;
  }
}
#main-visual video {
  display: block;
  width: 100%;
  height: auto;
}

[data-fadeIn] {
  visibility: hidden;
  opacity: 0;
  transform: translateY(30px);
  transition: 1s transform, 1s opacity;
  transition-timing-function: cubic-bezier(0.22, 0.61, 0.36, 1);
}
[data-fadeIn].active {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}

#contents {
  position: relative;
  width: 100%;
  padding-bottom: 26vw;
  background-image: url(../image/background/background-shadow.webp);
  background-repeat: no-repeat;
  background-size: 100%;
  background-position: center top;
}
@media (max-width: 600px) {
  #contents {
    padding-bottom: 12vw;
    background: none;
  }
}
#contents-wrap {
  position: relative;
  z-index: 1;
  width: 87.5vw;
  margin: 0 auto;
  padding-top: 10vw;
  padding-bottom: 5vw;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.15);
  background-color: #fff;
}
@media (max-width: 600px) {
  #contents-wrap {
    width: 100%;
    margin-top: -4vw;
    padding: 0;
    box-shadow: none;
    background-color: transparent;
  }
}
#contents-images {
  position: absolute;
  z-index: 0;
  top: 0;
  left: 0;
  display: block;
  width: 100%;
  height: 100%;
  opacity: 0.35;
  overflow: hidden;
}
@media (max-width: 600px) {
  #contents-images {
    display: none;
  }
}
#contents-images .contents-image {
  position: absolute;
  top: 0;
}
#contents-images .contents-image img {
  display: block;
  width: 100%;
  height: auto;
}
#contents-images .contents-image.pic-001 {
  left: 0;
  width: 14vw;
  transform: translate(6vw, 11vw);
}
#contents-images .contents-image.pic-002 {
  z-index: 1;
  left: 0;
  width: 29vw;
  transform: translate(22vw, 20vw);
}
#contents-images .contents-image.pic-003 {
  right: 0;
  width: 19vw;
  transform: translate(0, 6vw);
}
#contents-images .contents-image.pic-004 {
  width: 25vw;
  transform: translate(0vw, 28.5vw);
}
#contents-images .contents-image.pic-005 {
  right: 0;
  width: 12.5vw;
  transform: translate(0, 51vw);
}
#contents-images .contents-image.pic-006 {
  right: 0;
  width: 15vw;
  transform: translate(0vw, 76vw);
}
#contents-images .contents-image.pic-007 {
  width: 17.5vw;
  transform: translate(0vw, 81.5vw);
}
#contents-images .contents-image.pic-008 {
  width: 17.5vw;
  transform: translate(0vw, 111.5vw);
}
#contents-images .contents-image.pic-009 {
  right: 0;
  width: 22.5vw;
  transform: translate(0vw, 117vw);
}
#contents-images .contents-image.pic-010 {
  z-index: 1;
  right: 0;
  width: 21.5vw;
  transform: translate(0vw, 149vw);
}
#contents-images .contents-image.pic-011 {
  right: 0;
  width: 14vw;
  transform: translate(-1.5vw, 172vw);
}
#contents-images .contents-image.pic-012 {
  width: 20vw;
  transform: translate(0vw, 156vw);
}
#contents-images .contents-image.pic-013 {
  right: 0;
  width: 29.5vw;
  transform: translate(0vw, 200vw);
}
#contents-images .contents-image.pic-014 {
  width: 5vw;
  transform: translate(0vw, 197vw);
}
#contents-images .contents-image.pic-015 {
  width: 33vw;
  transform: translate(3vw, 211vw);
}
#contents-images .contents-image.pic-016 {
  width: 16vw;
  transform: translate(40.5vw, 225vw);
}
#contents-images .contents-image.cloud-001 {
  width: 31vw;
  transform: translate(53.5vw, 20.5vw);
}
#contents-images .contents-image.cloud-002 {
  right: 0;
  width: 5vw;
  transform: translate(0vw, 43vw);
}
#contents-images .contents-image.cloud-003 {
  width: 29vw;
  transform: translate(0, 67vw);
}
#contents-images .contents-image.cloud-004 {
  right: 0;
  width: 24.5vw;
  transform: translate(0vw, 100.5vw);
}
#contents-images .contents-image.cloud-005 {
  width: 25vw;
  transform: translate(0vw, 138vw);
}
#contents-images .contents-image.cloud-006 {
  width: 13vw;
  transform: translate(0vw, 185.5vw);
}
#contents-images .contents-image.cloud-007 {
  z-index: 1;
  right: 0;
  width: 39vw;
  transform: translate(-12.5vw, 222vw);
}

#lead {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin: 0;
  padding: 6vw 12.5%;
}
@media (max-width: 600px) {
  #lead {
    padding: 15vw 7.5vw 18vw 7.5vw;
    background-image: url(../image/background/cloud-001_sp.webp);
    background-repeat: no-repeat;
    background-size: 35vw;
    background-position: right bottom;
  }
}
#lead .button {
  width: 100%;
  margin-bottom: 3vw;
}
#lead .button a {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 450px;
  height: 3.75vw;
  margin: 0 auto;
  font-size: 1.25vw;
  font-family: sans-serif;
  font-weight: 700;
  color: #fff;
  transition: 0.4s opacity;
  border-radius: 999px;
  background-color: #14254D;
}
@media (max-width: 600px) {
  #lead .button a {
    height: clamp(45px, 15px + 6.5217391304vw, 60px);
    font-size: clamp(14px, 8px + 1.3043478261vw, 17px);
  }
}
#lead .button a:hover {
  opacity: 0.6;
  text-decoration: none;
}
#lead p {
  display: inline-block;
  width: auto;
  font-size: 1.05vw;
}
@media (max-width: 600px) {
  #lead p {
    font-size: clamp(16px, 0px + 3.4782608696vw, 24px);
  }
  #lead p br {
    display: none;
  }
}

section {
  margin-top: 12vw;
}
@media (max-width: 600px) {
  section {
    margin-top: 0;
    background-repeat: no-repeat;
  }
  section:nth-of-type(1) {
    padding-bottom: 20vw;
    background-image: url(../image/background/cloud-002_sp.webp);
    background-size: 70vw;
    background-position: right bottom 3vw;
  }
  section:nth-of-type(2) {
    padding-bottom: 25vw;
    background-image: url(../image/background/cloud-003_sp.webp);
    background-size: 50vw;
    background-position: right 25vw bottom;
  }
  section:nth-of-type(3) {
    margin-top: -5vw;
    padding-bottom: 20vw;
    background-image: url(../image/background/cloud-004_sp.webp);
    background-size: 45vw;
    background-position: right bottom;
  }
  section.book {
    background-image: none;
  }
}
section:first-of-type {
  margin-top: 0;
}
section .contents {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  flex-wrap: wrap;
  width: 100%;
  color: #000;
  transition: 0.4s opacity;
}
section .contents:hover {
  text-decoration: none;
  opacity: 0.7;
}
section .contents-image {
  width: 62.5%;
}
@media (max-width: 600px) {
  section .contents-image {
    order: -1 !important;
    width: 100% !important;
    margin-bottom: 10vw;
  }
}
section .contents-image picture {
  display: flex;
  width: 100%;
}
section .contents-image picture img {
  width: 100%;
  height: auto;
}
section .contents-text {
  position: relative;
  width: 37.5%;
  padding: 0 4vw;
}
@media (max-width: 600px) {
  section .contents-text {
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 10.5vw;
    padding: 0 7.5vw;
  }
}
section .contents-text::before {
  content: "";
  position: absolute;
  z-index: 1;
  top: -10vw;
  right: 2.5vw;
  display: block;
  width: 2.5vw;
  height: auto;
  aspect-ratio: 13/95;
  background-image: url(../image/decoration-001.webp);
  background-size: contain;
  background-position: center top;
  background-repeat: no-repeat;
}
@media (max-width: 600px) {
  section .contents-text::before {
    right: 0;
    width: 6vw;
  }
}
section .contents-text .tag {
  margin-bottom: 2vw;
}
@media (max-width: 600px) {
  section .contents-text .tag {
    margin-bottom: 5vw;
  }
}
section .contents-text .tag img {
  width: auto;
  height: 2vw;
}
@media (max-width: 600px) {
  section .contents-text .tag img {
    height: 5vw;
  }
}
section .contents-text h2 {
  position: relative;
  display: block;
  width: 100%;
  padding-bottom: 0.5em;
  font-size: 2.5vw;
  font-weight: 600;
  line-height: 1.35;
}
@media (max-width: 600px) {
  section .contents-text h2 {
    font-size: clamp(32px, 0px + 7.3913043478vw, 51px);
    text-decoration-thickness: clamp(7px, 1px + 1.3043478261vw, 10px);
    text-underline-offset: clamp(6px, 0px + 1.3043478261vw, 9px);
  }
}
section .contents-text h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  display: block;
  width: 1.25em;
  height: 0.2em;
  background: linear-gradient(90deg, #e8546b 0%, #f6c8dd 100%);
}
section .contents-text p {
  display: block;
  margin-top: 2vw;
  font-size: 1.4vw;
  font-weight: 600;
  line-height: 1.35;
}
@media (max-width: 600px) {
  section .contents-text p {
    margin-top: 8.5vw;
    font-size: clamp(18px, 0px + 3.9130434783vw, 27px);
  }
}
section .contents-sub {
  display: flex;
  justify-content: flex-end;
  align-items: stretch;
  width: 100%;
  margin-top: -6.5vw;
}
@media (max-width: 600px) {
  section .contents-sub {
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    flex-wrap: wrap;
    width: 100%;
    margin: 0 auto;
    padding: 0 7.5vw;
  }
}
section .contents-sub--image {
  width: 37.5%;
  padding: 0 4vw;
}
@media (max-width: 600px) {
  section .contents-sub--image {
    order: -1;
    width: 100% !important;
    margin-bottom: 5vw;
    padding: 0 !important;
  }
}
section .contents-sub--image picture {
  display: flex;
  width: 100%;
}
section .contents-sub--image picture img {
  width: 100%;
  height: auto;
}
section .contents-sub--image > p {
  margin-top: 0.5em;
  font-size: clamp(10px, -2px + 1vw, 12px);
  font-family: sans-serif;
  text-align: right;
}
section .contents-sub--text {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  order: -1;
  width: 62.5%;
  padding-top: 8.5vw;
  padding-left: 5.5vw;
}
@media (max-width: 600px) {
  section .contents-sub--text {
    width: 100% !important;
    padding: 0 !important;
  }
}
section .contents-sub--text p {
  width: 100%;
  font-size: 1.05vw;
}
@media (max-width: 600px) {
  section .contents-sub--text p {
    font-size: clamp(16px, 0px + 3.4782608696vw, 24px);
  }
}
section:nth-of-type(2) .contents-image {
  order: 1;
}
section:nth-of-type(2) .contents-sub {
  order: 2;
}
section:nth-of-type(2) .contents-sub--image p {
  text-align: left;
}
section:nth-of-type(2) .contents-sub--text {
  order: 1;
  padding-left: 0;
  padding-right: 5.5vw;
}

.book {
  padding: 4.5vw 0;
  background-color: #E7E9ED;
}
@media (max-width: 600px) {
  .book {
    padding: 90px 0;
  }
}
.book-contents {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: 50vw;
  margin: 0 auto;
  padding-left: 2.5vw;
  padding-right: 2.5vw;
}
@media (max-width: 600px) {
  .book-contents {
    flex-direction: column;
    width: 65vw;
    max-width: 400px;
    padding-left: 3.5vw;
    padding-right: 3.5vw;
  }
}
.book-contents--image {
  flex: 1;
}
@media (max-width: 600px) {
  .book-contents--image {
    padding-left: 5vw;
    padding-right: 5vw;
  }
}
.book-contents--image picture {
  display: flex;
  box-shadow: 10px 10px 20px rgba(0, 0, 0, 0.15);
}
.book-contents--image picture img {
  width: 100%;
  height: auto;
}
.book-contents--image h2 {
  display: none;
}
@media (max-width: 600px) {
  .book-contents--image h2 {
    display: block;
    width: 100%;
    max-width: 180px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 3vw;
  }
  .book-contents--image h2 img {
    width: 100%;
    height: auto;
  }
}
.book-contents--text {
  flex: 1;
  margin-left: 4.5vw;
}
@media (max-width: 600px) {
  .book-contents--text {
    width: 100%;
    margin: 7.5vw 0 0 0;
  }
}
.book-contents--text h2 {
  width: 100%;
  margin-bottom: 4.5vw;
}
@media (max-width: 600px) {
  .book-contents--text h2 {
    display: none;
  }
}
.book-contents--text h2 img {
  display: block;
  width: 80%;
  height: auto;
  margin: 0 auto;
}
.book-contents--text .buttons {
  display: flex;
  flex-direction: column;
  gap: 2vw 0;
}
@media (max-width: 600px) {
  .book-contents--text .buttons {
    width: 100%;
    gap: 3.5vw 0;
  }
}
.book-contents--text .buttons a {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 3.75vw;
  font-size: 1.25vw;
  font-family: sans-serif;
  font-weight: 700;
  color: #fff;
  transition: 0.4s opacity;
  border-radius: 999px;
  background-color: #14254D;
}
@media (max-width: 600px) {
  .book-contents--text .buttons a {
    height: clamp(45px, 15px + 6.5217391304vw, 60px);
    font-size: clamp(14px, 8px + 1.3043478261vw, 17px);
  }
}
.book-contents--text .buttons a:hover {
  opacity: 0.6;
  text-decoration: none;
}

header {
  width: 100%;
  height: 100px;
  background-color: #14254D;
}
@media (max-width: 768px) {
  header {
    height: 60px;
  }
}
header .header-wrap {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: 1600px;
  height: 100%;
  margin-left: auto;
  margin-right: auto;
  padding: 0 3.5%;
}
header .header-wrap * img {
  width: 100%;
  height: auto;
}
header .header-wrap .parents {
  width: 200px;
}
@media (max-width: 768px) {
  header .header-wrap .parents {
    width: 120px;
  }
}
header .header-wrap h1 {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 220px;
  transform: translate(-50%, -50%);
}
@media (max-width: 768px) {
  header .header-wrap h1 {
    position: static;
    width: 80px;
    transform: translate(0, 0);
  }
}
header .header-wrap h1 picture {
  display: flex;
}
header .header-wrap h1 picture img {
  width: 100%;
  height: auto;
}

.tu-logo {
  width: 100%;
  margin-top: 3vw;
}
@media (max-width: 768px) {
  .tu-logo {
    margin-top: 15vw;
  }
}
.tu-logo a {
  display: block;
  width: 100%;
  max-width: 234px;
  margin: 0 auto;
  transition: 0.4s opacity;
}
.tu-logo a img {
  display: block;
  width: 100%;
}
.tu-logo a:hover {
  opacity: 0.5;
}

footer {
  width: 100%;
  margin-top: 3vw;
  border-top: 1px solid #dddddd;
}
@media (max-width: 768px) {
  footer {
    margin-top: 15vw;
  }
}
footer .social {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  width: 100%;
  margin: 0;
  padding-top: 40px;
  padding-bottom: 40px;
}
footer .social--item {
  width: 38px;
}
footer .social--item img {
  width: 100%;
}
footer .copyrights {
  width: 100%;
  margin: 0;
  padding: 32px 5%;
  color: #fff;
  background-color: #14244d;
}
footer .copyrights p {
  font-size: 0.75em;
  text-align: center;
}
footer .copyrights p br {
  display: none;
}
@media (max-width: 768px) {
  footer .copyrights p br {
    display: block;
  }
}