:root {
  --text: #333333;
  --muted: #666666;
  --line: #cccccc;
  --blue: #009cd3;
  --footer: #767671;
  --white: #ffffff;
  --panel: #f7f6f4;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
}

body {
  margin: 0;
  padding: 0;
  background: #ffffff;
  color: var(--text);
  font-family: "游ゴシック Medium", "Yu Gothic Medium", "YuGothic", Meiryo, sans-serif;
  font-size: 15px;
  line-height: 2;
}

img {
  display: block;
  max-width: 100%;
}

ul {
  margin: 0;
  padding: 0;
}

a {
  color: inherit;
}

.top-scene {
  position: relative;
  min-height: 720px;
  overflow: hidden;
  background-image: linear-gradient(rgba(0, 0, 0, 0.30), rgba(0, 0, 0, 0.24)), url("../images/index.jpg");
  background-position: center center;
  background-size: cover;
}

.site-header {
  position: relative;
  z-index: 2;
  width: 960px;
  height: 100px;
  margin: 0 auto;
}

.logo {
  float: left;
  margin-top: 50px;
}

.logo img {
  width: 290px;
  height: auto;
}

.global-nav {
  float: right;
  margin-top: 60px;
}

.global-nav li {
  float: left;
  margin: 0 20px;
  font-family: Bitter, serif;
  font-size: 20px;
  list-style: none;
}

.global-nav li a {
  color: #ffffff;
  text-decoration: none;
}

.global-nav li a:hover,
.global-nav li a:focus-visible {
  border-bottom: 2px solid #ffffff;
  padding-bottom: 3px;
  text-decoration: none;
}

.hero {
  position: relative;
  z-index: 1;
  width: 960px;
  max-width: 95%;
  margin: 0 auto;
  padding: 40px 0 88px;
}

.hero-inner {
  width: 100%;
}

.eyebrow {
  margin: 0 0 18px;
  color: rgba(255, 255, 255, 0.82);
  font-family: Bitter, Georgia, serif;
  font-size: 15px;
  font-weight: 700;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 30px;
  color: #ffffff;
  font-family: Bitter, "游ゴシック Medium", serif;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 1.05;
  letter-spacing: 0;
}

.lead {
  margin-bottom: 34px;
  color: #ffffff;
  font-size: 16px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 40px;
}

.button {
  display: block;
  width: 185px;
  margin-top: 0;
  border: 3px solid var(--blue);
  border-radius: 5px;
  background-color: var(--blue);
  color: #ffffff;
  font-family: Bitter, Georgia, serif;
  font-size: 20px;
  font-weight: 400;
  line-height: 50px;
  text-align: center;
  text-decoration: none;
}

.button:visited {
  color: #ffffff;
}

.button:hover,
.button:focus-visible {
  background-color: transparent;
  color: #ffffff;
  text-decoration: none;
}

.thumbnail-section {
  position: relative;
  z-index: 2;
  overflow: hidden;
  margin-top: 86px;
  padding: 0 0 20px;
  background: transparent;
}

.marquee-shell {
  position: relative;
  display: grid;
  gap: 22px;
  width: 95%;
  margin: 0 auto;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, rgba(0, 0, 0, 0.32) 5%, #000000 13%, #000000 87%, rgba(0, 0, 0, 0.32) 95%, transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0%, rgba(0, 0, 0, 0.32) 5%, #000000 13%, #000000 87%, rgba(0, 0, 0, 0.32) 95%, transparent 100%);
}

.thumbnail-marquee {
  display: flex;
  gap: 18px;
  width: max-content;
  animation: thumbnail-flow 82s linear infinite;
}

.row-two {
  animation-duration: 96s;
}

.thumbnail-track {
  display: flex;
  flex: 0 0 auto;
  gap: 18px;
  padding-right: 18px;
}

.thumbnail-tile {
  display: block;
  flex: 0 0 236px;
  width: 236px;
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 5px;
  background: transparent;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
  text-decoration: none;
  transition: opacity 180ms ease, transform 180ms ease;
}

.thumbnail-tile:hover,
.thumbnail-tile:focus-visible {
  opacity: 0.86;
  transform: translateY(-2px);
}

.thumbnail-tile img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.marquee-fade {
  position: absolute;
  z-index: 2;
  top: 0;
  bottom: 0;
  width: min(16vw, 220px);
  pointer-events: none;
}

.marquee-fade-left {
  left: 0;
  background: linear-gradient(90deg, rgba(23, 28, 28, 0.18) 0%, rgba(23, 28, 28, 0.08) 42%, rgba(23, 28, 28, 0) 100%);
}

.marquee-fade-right {
  right: 0;
  background: linear-gradient(270deg, rgba(23, 28, 28, 0.18) 0%, rgba(23, 28, 28, 0.08) 42%, rgba(23, 28, 28, 0) 100%);
}

@keyframes thumbnail-flow {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

.quick-links {
  width: min(960px, calc(100% - 48px));
  margin: 0 auto;
  padding: 52px 0 80px;
  border-top: 1px solid var(--line);
}

.section-heading h2 {
  margin-bottom: 24px;
  border-bottom: 1px solid var(--line);
  font-family: Bitter, "游ゴシック Medium", serif;
  font-size: 36px;
  line-height: 1.5;
}

.quick-links .eyebrow {
  color: var(--blue);
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.link-grid a {
  display: block;
  min-height: 118px;
  padding: 18px 0 16px;
  border-top: 4px solid #9cb4a4;
  color: var(--muted);
  text-decoration: none;
}

.link-grid a:hover,
.link-grid a:focus-visible {
  color: var(--blue);
  text-decoration: none;
}

.link-grid span {
  display: block;
  margin-bottom: 6px;
  color: var(--text);
  font-family: Bitter, Georgia, serif;
  font-size: 24px;
  font-weight: 700;
}

.site-footer {
  padding: 20px 0;
  background-color: var(--footer);
  color: #ffffff;
  text-align: center;
}

.site-footer small {
  font-size: 12px;
}

@media screen and (max-width: 960px) {
  .hero,
  .quick-links {
    width: 95%;
  }

  .site-header {
    width: auto;
    height: auto;
    margin: 0 15px;
    padding-top: 45px;
  }

  .logo {
    float: none;
    margin-top: 0;
    text-align: center;
  }

  .logo img {
    margin: 0 auto;
  }

  .global-nav {
    float: none;
    margin-top: 20px;
    text-align: center;
  }

  .global-nav li {
    display: inline;
    float: none;
    margin: 0 12px;
  }

  .hero {
    padding-top: 36px;
  }

  .thumbnail-tile {
    flex-basis: 210px;
    width: 210px;
  }

  .link-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media screen and (max-width: 600px) {
  body {
    font-size: 3.5vw;
  }

  .top-scene {
    min-height: 680px;
    background-image: linear-gradient(rgba(0, 0, 0, 0.34), rgba(0, 0, 0, 0.28)), url("../images/bg-index-sp.jpg");
  }

  .site-header {
    width: auto;
    height: auto;
    margin: 0 5%;
    padding-top: 0;
  }

  .logo {
    float: none;
    margin-top: 45px;
    text-align: center;
  }

  .logo img {
    width: 65%;
    max-width: 290px;
    margin: 0 auto;
  }

  .global-nav {
    float: none;
    margin-top: 20px;
    text-align: center;
  }

  .global-nav li {
    display: inline;
    float: none;
    margin: 0 5px;
    font-size: 4.3vw;
  }

  .hero {
    padding: 34px 0 68px;
  }

  h1 {
    font-size: 9vw;
    margin-bottom: 28px;
  }

  .lead {
    font-size: 3.8vw;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
    width: 185px;
    margin-right: auto;
    margin-left: auto;
  }

  .thumbnail-section {
    margin-top: 70px;
    padding: 0 0 18px;
  }

  .thumbnail-marquee {
    animation-duration: 68s;
  }

  .row-two {
    animation-duration: 78s;
  }

  .thumbnail-tile {
    flex-basis: 184px;
    width: 184px;
  }

  .section-heading h2 {
    font-size: 7.2vw;
  }

  .link-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }

  .thumbnail-marquee {
    width: auto;
    overflow-x: auto;
    animation: none;
    scroll-snap-type: x proximity;
  }

  .thumbnail-track[aria-hidden="true"] {
    display: none;
  }

  .thumbnail-tile {
    scroll-snap-align: start;
  }

  .marquee-fade {
    display: none;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #ffffff;
    --muted: #d8dde2;
    --line: #3a3f47;
    --footer: #2e3138;
    --panel: #2e3138;
  }

  body {
    background: #21242a;
    color: #ffffff;
  }

  .quick-links {
    background: #21242a;
  }

  .thumbnail-section {
    background: transparent;
  }

  .thumbnail-tile {
    background: transparent;
    border-color: rgba(255, 255, 255, 0.12);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.34);
  }

  .marquee-fade-left {
    background: linear-gradient(90deg, rgba(23, 28, 28, 0.18) 0%, rgba(23, 28, 28, 0.08) 42%, rgba(23, 28, 28, 0) 100%);
  }

  .marquee-fade-right {
    background: linear-gradient(270deg, rgba(23, 28, 28, 0.18) 0%, rgba(23, 28, 28, 0.08) 42%, rgba(23, 28, 28, 0) 100%);
  }

  .quick-links {
    border-top-color: #3a3f47;
  }

  .section-heading h2 {
    border-bottom-color: #3a3f47;
  }

  .link-grid a {
    color: #d8dde2;
    border-top-color: #9cb4a4;
  }

  .link-grid span {
    color: #ffffff;
  }

  .site-footer {
    background-color: #2e3138;
  }
}