:root {
  --red: #2f79b7;
  --dark: #071b31;
  --navy: #0a2747;
  --gold: #b8d8ff;
  --ivory: #edf5ff;
  --lavender: #1c5f98;
  --peach: #75a9d8;
  --white: #ffffff;
  --line: rgba(7,27,49,.14);
  --header-height: 63px;
  --ease: cubic-bezier(.22,1,.36,1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
.section,
.sub-hero,
.site-footer {
  scroll-margin-top: 86px;
}
body {
  margin: 0;
  font-family: "Hiragino Sans", "Yu Gothic", "YuGothic", "Noto Sans JP", sans-serif;
  color: var(--dark);
  background: var(--ivory);
  overflow-x: hidden;
  letter-spacing: .02em;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: .012;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 42px;
  color: var(--white);
  text-shadow: 0 1px 18px rgba(0,0,0,.26);
  background: rgba(5, 24, 45, .88);
  border-bottom: 1px solid rgba(255,255,255,.14);
  box-shadow: 0 14px 34px rgba(2,14,28,.22);
  backdrop-filter: blur(18px);
}
.logo {
  font-family: Georgia, serif;
  letter-spacing: .16em;
  font-size: 14px;
  font-weight: 600;
}
.site-header nav {
  display: flex;
  gap: 28px;
  font-size: 12px;
  letter-spacing: .2em;
}
.site-header nav a { position: relative; }
.site-header nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width .35s var(--ease);
}
.site-header nav a:hover::after { width: 100%; }
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  gap: 5px;
  flex-direction: column;
  border: 1px solid rgba(255,255,255,.42);
  background: rgba(7,27,49,.24);
  color: var(--white);
  padding: 0;
  cursor: pointer;
  backdrop-filter: blur(16px);
}
.menu-toggle span {
  display: block;
  width: 18px;
  height: 1px;
  background: currentColor;
  transition: transform .35s var(--ease), opacity .35s var(--ease);
}
.site-header.is-menu-open .menu-toggle span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.site-header.is-menu-open .menu-toggle span:nth-child(2) {
  opacity: 0;
}
.site-header.is-menu-open .menu-toggle span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.sub-hero {
  min-height: calc(78svh - var(--header-height));
  margin-top: var(--header-height);
  position: relative;
  display: grid;
  align-items: end;
  padding: 88px 7vw 70px;
  color: var(--white);
  overflow: hidden;
  background:
    radial-gradient(circle at 16% 16%, rgba(92,164,224,.3), transparent 24%),
    linear-gradient(145deg, #0e3156 0%, #155d91 54%, #06182c 100%);
}
.sub-hero__image {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: var(--hero-position, center);
}
.sub-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    radial-gradient(circle at 16% 16%, rgba(92,164,224,.3), transparent 24%),
    linear-gradient(90deg, rgba(4,19,36,.66), rgba(16,82,130,.1) 48%, rgba(3,15,29,.46));
  pointer-events: none;
}
.sub-hero::after {
  content: none;
}
.sub-hero__inner {
  position: relative;
  z-index: 2;
  max-width: 860px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--gold);
  letter-spacing: .28em;
  font-size: 12px;
  margin-bottom: 26px;
}
.eyebrow::before {
  content: "";
  width: 44px;
  height: 1px;
  background: currentColor;
}
.page-title {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(54px, 8vw, 118px);
  line-height: .88;
  letter-spacing: -.015em;
  font-weight: 400;
  text-transform: uppercase;
}
.lead {
  max-width: 720px;
  margin: 28px 0 0;
  color: rgba(255,255,255,.88);
  font-size: clamp(15px, 1.4vw, 19px);
  line-height: 2;
}

.ticker {
  display: flex;
  gap: 32px;
  align-items: center;
  height: 66px;
  background: #f7fbff;
  color: var(--dark);
  overflow: hidden;
  white-space: nowrap;
  font-family: Georgia, serif;
  font-size: 24px;
  letter-spacing: .08em;
  border-top: 1px solid rgba(7,27,49,.08);
  border-bottom: 1px solid rgba(7,27,49,.08);
}
.ticker__inner {
  display: flex;
  gap: 32px;
  animation: ticker 25s linear infinite;
}
@keyframes ticker {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.section {
  padding: 100px 7vw;
}
.section--gradient {
  background:
    radial-gradient(circle at 12% 0%, rgba(93,172,232,.22), transparent 30%),
    linear-gradient(145deg, #08213d 0%, #0f4d78 56%, #06182c 100%);
  color: var(--white);
}
.section--light {
  background: var(--white);
}
.section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 42px;
  margin-bottom: 54px;
  align-items: end;
}
.section-title {
  margin: 0;
  font-family: Georgia, serif;
  font-size: clamp(42px, 5.6vw, 86px);
  line-height: .9;
  letter-spacing: .02em;
  font-weight: 400;
}
.section-desc {
  margin: 0;
  line-height: 2;
  color: #555;
  max-width: 760px;
}
.section--gradient .section-desc { color: rgba(255,255,255,.78); }

.panel-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(47,121,183,.26);
  border: 1px solid rgba(47,121,183,.26);
}
.panel {
  background: rgba(255,255,255,.74);
  padding: 42px;
}
.panel h3 {
  margin: 0 0 18px;
  font-size: clamp(24px, 3vw, 34px);
}
.panel p,
.panel li {
  color: #5c5358;
  line-height: 2;
}
.panel ul {
  margin: 0;
  padding-left: 1.2em;
}
.panel--dark {
  background: rgba(255,255,255,.9);
  box-shadow: 0 18px 50px rgba(7,27,49,.08);
}
.panel--dark h3 {
  color: var(--dark);
}
.panel--dark p,
.panel--dark li { color: #463d45; }
.panel--dark .timeline div {
  border-bottom-color: rgba(7,27,49,.16);
}

.news-list {
  border-top: 1px solid rgba(255,255,255,.45);
}
.news-tabs {
  display: flex;
  gap: 12px;
  margin: -18px 0 34px;
  overflow-x: auto;
  padding-bottom: 4px;
}
.news-tabs button {
  min-width: 94px;
  border: 1px solid rgba(255,255,255,.42);
  background: rgba(255,255,255,.12);
  color: var(--white);
  padding: 12px 18px;
  font-family: Georgia, serif;
  font-size: 12px;
  letter-spacing: .16em;
  cursor: pointer;
  transition: background .28s var(--ease), color .28s var(--ease), border-color .28s var(--ease);
}
.news-tabs button.is-active {
  background: var(--white);
  color: var(--dark);
  border-color: var(--white);
}
.news-list.is-loading::after {
  content: "LOADING";
  display: block;
  padding: 28px 0 0;
  color: rgba(255,255,255,.72);
  font-family: Georgia, serif;
  font-size: 12px;
  letter-spacing: .22em;
}
.news-item {
  display: grid;
  grid-template-columns: 170px 120px 1fr 80px;
  gap: 24px;
  align-items: center;
  padding: 30px 0;
  border-bottom: 1px solid rgba(255,255,255,.36);
  transition: padding-left .35s var(--ease), color .35s var(--ease), opacity .55s var(--ease), transform .55s var(--ease);
}
.news-item.is-added {
  opacity: 0;
  transform: translateY(22px);
}
.news-item.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.news-item:hover {
  padding-left: 18px;
  color: var(--gold);
}
.date { font-family: Georgia, serif; font-size: 18px; }
.tag {
  font-size: 11px;
  letter-spacing: .16em;
  font-family: Georgia, serif;
  font-style: italic;
}
.news-title {
  font-family: Georgia, "Hiragino Mincho ProN", serif;
  font-size: clamp(17px, 1.7vw, 24px);
  line-height: 1.55;
  letter-spacing: .05em;
}
.arrow {
  justify-self: end;
  font-family: Georgia, serif;
  font-size: 22px;
}

.profile-layout {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 7vw;
  align-items: start;
}
.profile-photo {
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: #ddd;
}
.profile-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}
.timeline {
  display: grid;
  gap: 14px;
}
.timeline div {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  color: #554b52;
  line-height: 1.8;
}
.timeline time {
  font-family: Georgia, serif;
  color: var(--red);
}

.member-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 54px;
}
.member-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-weight: 700;
  line-height: 1.6;
}
.sponsor-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 24px;
}
.sponsor-card {
  min-height: 86px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  background: rgba(255,255,255,.78);
  border: 1px solid rgba(7,27,49,.08);
}
.sponsor-card img {
  width: 100%;
  max-height: 54px;
  object-fit: contain;
}
.sponsor-card--small img { max-width: 150px; }

.join-panel {
  display: grid;
  grid-template-columns: .82fr 1.18fr;
  gap: 48px;
  align-items: start;
  border: 1px solid rgba(7,27,49,.14);
  background: rgba(255,255,255,.58);
  padding: clamp(28px, 4vw, 52px);
}
.join-copy {
  display: grid;
  gap: 28px;
}
.join-copy p {
  margin: 0;
  color: #4f5964;
  line-height: 2;
}
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.download-card {
  min-height: 154px;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(7,27,49,.16);
  background:
    linear-gradient(180deg, rgba(255,255,255,.88), rgba(237,245,255,.72));
  padding: 20px;
  transition: transform .35s var(--ease), border-color .35s var(--ease), box-shadow .35s var(--ease);
}
.download-card:hover {
  transform: translateY(-6px);
  border-color: rgba(47,121,183,.42);
  box-shadow: 0 18px 42px rgba(7,27,49,.12);
}
.download-card span {
  color: var(--red);
  font-family: Georgia, serif;
  font-size: 11px;
  font-style: italic;
  letter-spacing: .18em;
}
.download-card strong {
  margin-top: 20px;
  color: var(--dark);
  font-family: Georgia, "Hiragino Mincho ProN", serif;
  font-size: clamp(19px, 1.75vw, 25px);
  line-height: 1.25;
}
.download-card em {
  margin-top: 12px;
  color: #4f5964;
  font-size: 13px;
  line-height: 1.6;
  font-style: normal;
}
.download-card small {
  margin-top: auto;
  padding-top: 18px;
  color: #6a7581;
  font-size: 12px;
  letter-spacing: .08em;
}

.article {
  max-width: 980px;
  margin: 0 auto;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
  color: var(--red);
  font-family: Georgia, serif;
  letter-spacing: .08em;
}
.article h2 {
  margin: 0 0 24px;
  font-family: Georgia, "Hiragino Mincho ProN", serif;
  font-size: clamp(34px, 5vw, 68px);
  line-height: 1.15;
}
.article p {
  line-height: 2.1;
  color: #51484f;
}
.article-body {
  display: grid;
  gap: 18px;
}
.article-body[hidden],
.article-links[hidden] {
  display: none;
}
.article-body p {
  margin: 0;
}
.article-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.article-links a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  border: 1px solid rgba(7,27,49,.22);
  border-radius: 999px;
  padding: 0 18px;
  color: var(--dark);
  font-size: 12px;
  letter-spacing: .08em;
  transition: transform .35s var(--ease), border-color .35s var(--ease), background .35s var(--ease);
}
.article-links a:hover {
  transform: translateY(-3px);
  border-color: rgba(47,121,183,.46);
  background: rgba(255,255,255,.72);
}
.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-top: 58px;
  border-top: 1px solid var(--line);
  padding-top: 24px;
}

.contact-form {
  display: grid;
  gap: 18px;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid rgba(7,27,49,.18);
  background: rgba(255,255,255,.78);
  padding: 16px 18px;
  font: inherit;
  color: var(--dark);
}
.contact-form textarea {
  min-height: 180px;
  resize: vertical;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  min-width: 160px;
  height: 52px;
  border: 1px solid rgba(7,27,49,.32);
  border-radius: 999px;
  padding: 0 28px;
  font-size: 12px;
  letter-spacing: .15em;
  transition: transform .35s var(--ease), background .35s var(--ease), color .35s var(--ease);
}
.btn:hover { transform: translateY(-3px); }
.btn--primary {
  color: var(--white);
  background: var(--dark);
  border-color: var(--dark);
}

.site-footer {
  background: var(--white);
  padding: 70px 7vw 34px;
}
.footer-main {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 50px;
}
.footer-logo {
  font-family: Georgia, serif;
  font-size: clamp(36px, 7vw, 108px);
  line-height: .9;
  letter-spacing: -.05em;
}
.footer-links {
  display: grid;
  gap: 12px;
  font-size: 13px;
  letter-spacing: .12em;
}
.social-links {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: flex-end;
}
.social-links a {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(7,27,49,.24);
  border-radius: 50%;
  color: var(--dark);
  background: rgba(255,255,255,.72);
  transition: transform .3s var(--ease), background .3s var(--ease), color .3s var(--ease);
}
.social-links a:hover {
  transform: translateY(-3px);
  background: var(--dark);
  color: var(--white);
}
.social-icon {
  width: 18px;
  height: 18px;
  display: block;
  fill: currentColor;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}
.copyright {
  margin-top: 24px;
  color: #777;
  font-size: 12px;
}

@media (max-width: 900px) {
  :root { --header-height: 81px; }
  .site-header { padding: 18px 20px; }
  .menu-toggle { display: flex; }
  .site-header nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 20px;
    right: 20px;
    display: grid;
    gap: 0;
    padding: 10px 0;
    background: rgba(7,27,49,.92);
    border: 1px solid rgba(255,255,255,.22);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity .28s var(--ease), transform .28s var(--ease);
    backdrop-filter: blur(18px);
  }
  .site-header.is-menu-open nav {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
  .site-header nav a {
    padding: 16px 18px;
  }
  .site-header nav a::after { display: none; }
  .sub-hero {
    min-height: calc(100svh - var(--header-height));
    padding: 84px 24px 54px;
    background:
      linear-gradient(145deg, #0e3156 0%, #155d91 54%, #06182c 100%);
  }
  .sub-hero__image {
    object-fit: cover;
    object-position: var(--hero-mobile-position, var(--hero-position, center top));
  }
  .sub-hero::before {
    background-image:
      linear-gradient(90deg, rgba(4,19,36,.66), rgba(16,82,130,.12) 48%, rgba(3,15,29,.48));
  }
  .sub-hero::after {
    content: none;
  }
  .page-title { font-size: 54px; }
  .lead { font-size: 15px; line-height: 1.9; }
  .section { padding: 82px 24px; }
  .section-head,
  .panel-grid,
  .profile-layout,
  .member-columns,
  .join-panel,
  .download-grid {
    grid-template-columns: 1fr;
  }
  .footer-main {
    display: grid;
    grid-template-columns: 1fr;
  }
  .news-item {
    grid-template-columns: 1fr 72px;
    gap: 12px;
  }
  .news-item .date,
  .news-item .tag,
  .news-item .news-title { grid-column: 1 / 2; }
  .news-item .arrow { grid-column: 2 / 3; grid-row: 1 / 4; }
  .sponsor-grid { grid-template-columns: 1fr; }
  .timeline div { grid-template-columns: 1fr; gap: 4px; }
  .article-nav { flex-direction: column; }
  .social-links { justify-content: flex-start; }
}