:root {
  --ink: #132e46;
  --muted: #536778;
  --teal: #006e70;
  --line: #dbe5ec;
  --paper: #f4f7fa;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 30px; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif; font-size: 15px; line-height: 1.95; }
a { color: var(--teal); text-underline-offset: 5px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 3px solid #007e88; outline-offset: 5px; }
.skip { position: fixed; top: -100px; left: 12px; padding: 8px 16px; background: white; z-index: 10; }
.skip:focus { top: 10px; }
.header { background: #fff; border-bottom: 1px solid var(--line); }
.header-inner { width: min(1120px, 90%); margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 20px 0; }
.brand { display: flex; flex-direction: column; color: var(--ink); text-decoration: none; line-height: 1.4; }
.brand-mark { font-size: 27px; font-weight: 800; letter-spacing: -.04em; }
.brand-dot { color: var(--teal); }
.brand-school { margin-top: 3px; font-size: 11px; font-weight: 600; letter-spacing: .06em; color: var(--muted); }
nav { display: flex; gap: 28px; }
nav a { display: flex; align-items: center; min-height: 44px; color: var(--ink); text-decoration: none; font-size: 13px; font-weight: 600; }
nav a:hover { color: var(--teal); text-decoration: underline; }
.container { width: min(1040px, 90%); margin: auto; }
.intro { position: relative; isolation: isolate; overflow: hidden; margin: 24px 0 28px; padding: 30px 36px; border: 1px solid #ccdde9; border-radius: 20px; background: linear-gradient(115deg, #eaf3fa 0%, #f0f8f8 65%, #d4eee9 100%); }
.kicker { position: relative; z-index: 1; display: inline-block; margin: 0 0 16px; padding: 5px 12px; border: 1px solid #bfd3df; border-radius: 30px; color: #28566b; background: #ffffffb3; font-size: 12px; font-weight: 600; }
.hero-label { position: relative; z-index: 1; margin: 0 0 8px; font-size: 10px; color: var(--teal); letter-spacing: .16em; font-weight: 700; }
h1 { position: relative; z-index: 1; font-size: clamp(22px, 2.7vw, 30px); line-height: 1.55; letter-spacing: .025em; margin: 0 0 14px; font-weight: 700; }
h1 span { color: var(--teal); }
.hero-description { position: relative; z-index: 1; color: var(--muted); margin: 0 0 18px; font-size: 14px; }
.mobile-break { display: none; }
.primary-button { position: relative; z-index: 1; display: inline-flex; align-items: center; gap: 28px; padding: 10px 18px; border-radius: 8px; background: var(--ink); color: #fff; text-decoration: none; font-size: 13px; font-weight: 600; box-shadow: 0 5px 14px #132e4615; }
.primary-button:hover { background: var(--teal); }
.hero-orbit { position: absolute; z-index: -1; width: 330px; height: 330px; right: -90px; top: 45px; opacity: .45; }
.hero-orbit span { position: absolute; inset: 0; border: 1px solid #7baeb5; border-radius: 50%; transform: rotate(-35deg) scaleX(.45); }
.hero-orbit span:nth-child(2) { transform: rotate(35deg) scaleX(.45); }
.hero-orbit span:nth-child(3) { transform: rotate(90deg) scaleX(.45); }
.hero-orbit i { position: absolute; width: 18px; height: 18px; top: 156px; left: 156px; border-radius: 50%; background: #319a9b; box-shadow: 0 0 0 14px #319a9b12; }
section { margin-bottom: 28px; padding: 36px 40px 40px; background: #fff; border: 1px solid var(--line); border-radius: 16px; }
.section-label { margin: 0 0 8px; color: var(--teal); font-size: 10px; font-weight: 700; letter-spacing: .16em; }
h2 { font-size: 25px; line-height: 1.6; margin: 0 0 22px; letter-spacing: .03em; }
section > p:not(.section-label) { margin: 0 0 20px; }
dl { margin: 0; }
.details { margin-top: 26px; background: #f5f8fb; padding: 6px 24px; border-radius: 10px; }
dl > div { display: grid; grid-template-columns: 110px 1fr; gap: 20px; padding: 16px 0; }
dl > div + div { border-top: 1px solid var(--line); }
dt { font-size: 13px; font-weight: 600; color: var(--muted); }
dd { margin: 0; font-size: 14px; }
.english-name { color: var(--muted); font-size: 12px; margin-left: 12px; }
.sources { margin-top: 24px; }
h3 { font-size: 14px; margin: 0 0 8px; }
.sources ul { display: flex; flex-wrap: wrap; gap: 10px 24px; list-style: none; margin: 0; padding: 0; }
.sources li { font-size: 13px; }
.note { color: var(--muted); font-size: 12px; }
.education-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin: 26px 0 30px; }
.education-card { padding: 22px 18px; background: #f0f6fb; border-radius: 10px; border-top: 3px solid #337aa3; }
.education-card:nth-child(2) { background: #edf7f7; border-color: #168c91; }
.education-card:nth-child(3) { background: #f0f7f1; border-color: #408453; }
.card-number { display: block; margin-bottom: 14px; color: var(--muted); font-size: 11px; letter-spacing: .1em; }
.education-card h3 { font-size: 15px; line-height: 1.7; }
.education-card p { margin: 0; color: var(--muted); font-size: 12px; }
.partnership { margin: 0 0 22px; padding: 22px; border: 1px solid var(--line); border-radius: 12px; }
.partnership figcaption { font-size: 14px; font-weight: 600; margin-bottom: 20px; }
.structure-link { display: block; border-radius: 4px; }
.structure-link img { display: block; width: 100%; height: auto; }
.partnership .note { margin: 16px 0 0; text-align: right; }
.members-table-container { margin: 26px 0; overflow-x: auto; }
.members-table-container:focus-visible { outline: 3px solid #007e88; outline-offset: 5px; }
.members-table { width: 100%; min-width: 620px; border-collapse: collapse; line-height: 1.7; font-size: 14px; }
.members-table caption { margin-bottom: 16px; font-size: 1.4rem; font-weight: bold; text-align: left; }
.members-table th, .members-table td { border: 1px solid var(--line); padding: 12px 16px; text-align: left; vertical-align: top; }
.members-table thead th { background: #234b70; color: #fff; }
.members-table tbody th { background: #fff; white-space: nowrap; }
.members-table .materials th, .members-table .materials td { background: #eef7ef; }
.members-table .computing th, .members-table .computing td { background: #eef4fc; }
.news-item { display: grid; grid-template-columns: 150px 1fr; align-items: baseline; gap: 20px; padding: 20px 0 4px; border-top: 1px solid var(--line); }
.news-item time { color: var(--muted); font-size: 13px; }
.news-item p { margin: 0; font-size: 14px; }
.news-item a { color: var(--ink); }
footer { padding: 12px 0 36px; display: flex; align-items: center; justify-content: space-between; gap: 16px; color: var(--muted); font-size: 12px; }
.home-button { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 44px; padding: 8px 16px; border: 1px solid #c3d4dc; border-radius: 8px; font-size: 12px; font-weight: 600; text-decoration: none; background: white; }
.home-button:hover { border-color: var(--teal); }
@media (max-width: 760px) {
  .header-inner { flex-direction: column; align-items: flex-start; gap: 12px; padding: 16px 0 10px; }
  nav { width: 100%; gap: 0; }
  nav a { justify-content: center; flex: 1; font-size: 12px; }
  nav a + a { border-left: 1px solid var(--line); }
  .intro { margin: 20px 0; padding: 24px; border-radius: 14px; }
  h1 { font-size: clamp(21px, 4vw, 27px); }
  .hero-orbit { right: -170px; opacity: .25; }
  section { padding: 28px 24px; }
  .education-cards { grid-template-columns: 1fr; gap: 12px; }
  .education-card { position: relative; padding: 18px 20px 18px 55px; }
  .card-number { position: absolute; left: 18px; top: 22px; }
  .education-card br { display: none; }
  .partnership { padding: 14px; }
  .news-item { grid-template-columns: 1fr; gap: 6px; }
}
@media (max-width: 480px) {
  body { font-size: 14px; }
  .kicker { font-size: 10px; margin-bottom: 14px; padding: 4px 9px; }
  .hero-label { font-size: 9px; letter-spacing: .1em; }
  h1 { font-size: 21px; letter-spacing: 0; }
  .hero-description { font-size: 13px; }
  .mobile-break { display: inline; }
  h2 { font-size: 21px; }
  section { padding: 26px 18px; }
  .details { padding: 4px 16px; }
  dl > div { grid-template-columns: 1fr; gap: 4px; padding: 14px 0; }
  .english-name { display: inline-block; margin-left: 8px; }
  .partnership { padding: 10px; }
  footer { flex-direction: column; gap: 16px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }