:root {
  --navy: #003d6b;
  --navy-deep: #062a46;
  --blue: #0d6ea8;
  --yellow: #ffd400;
  --gold-text: #8a6b00;
  --cyan: #24a7d9;
  --ink: #061f33;
  --muted: #20384b;
  --line: #dce5ec;
  --paper: #f6f8fa;
  --white: #ffffff;
  --shadow: 0 22px 55px rgba(5, 35, 57, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, system-ui, sans-serif;
  font-size: 18px;
  line-height: 1.76;
}

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

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--yellow);
  outline-offset: 4px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 90px;
  padding: 12px clamp(18px, 5vw, 72px);
  color: var(--navy-deep);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(220, 229, 236, 0.9);
  backdrop-filter: blur(14px);
}

/* ── ブランドロゴ：アイコン ＋ 縦線 ＋ テキスト ── */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
  text-decoration: none;
}

.brand img {
  width: auto;
  height: 70px;
  object-fit: contain;
  flex-shrink: 0;
  padding: 0;
  background: transparent;
  border-radius: 0;
  box-shadow: none;
}

.brand-divider {
  display: block;
  width: 1px;
  height: 44px;
  background: #c0cdd6;
  flex-shrink: 0;
}

.brand-text {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  align-items: flex-start;
}

.brand-en {
  display: block;
  color: #8fa0ad;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1;
  white-space: nowrap;
}

.brand-ja {
  display: block;
  color: var(--navy-deep);
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.3;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 30px);
  font-size: 1rem;
  font-weight: 800;
  white-space: nowrap;
}

.site-nav a {
  color: var(--navy-deep);
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

.site-nav a:hover {
  color: var(--blue);
  text-decoration: underline;
}

.site-nav a[aria-current="page"] {
  color: var(--blue);
}

.hero {
  position: relative;
  min-height: auto;
  display: flex;
  align-items: flex-end;
  padding: clamp(86px, 13vw, 150px) clamp(18px, 6vw, 90px) clamp(50px, 8vw, 82px);
  color: var(--white);
  background: var(--navy-deep);
  overflow: hidden;
}

.hero-slideshow,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-shade {
  z-index: 1;
  background:
    linear-gradient(90deg, rgba(6, 42, 70, 0.88), rgba(6, 42, 70, 0.64) 48%, rgba(6, 42, 70, 0.2)),
    linear-gradient(0deg, rgba(6, 42, 70, 0.78), rgba(6, 42, 70, 0.08) 56%);
}

.slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.04);
  animation: heroSlide 24s infinite;
}

.slide-2 {
  animation-delay: 6s;
}

.slide-3 {
  animation-delay: 12s;
}

.slide-4 {
  animation-delay: 18s;
}

@keyframes heroSlide {
  0%,
  20% {
    opacity: 1;
  }

  25%,
  100% {
    opacity: 0;
  }
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(1040px, 100%);
  max-width: 1040px;
}

.logo-lockup {
  display: inline-grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  justify-items: center;
  gap: clamp(16px, 3vw, 30px);
  width: min(600px, 100%);
  padding: clamp(12px, 2.4vw, 20px) clamp(16px, 3vw, 28px);
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.logo-lockup span {
  color: #5f6972;
  font-size: clamp(1.35rem, 2.8vw, 2.2rem);
  font-weight: 700;
}

.logo-lockup img {
  width: auto;
  object-fit: contain;
}

.logo-tmf {
  justify-self: end;
  height: clamp(36px, 5.5vw, 58px);
  max-width: 180px;
}

.logo-saga {
  justify-self: start;
  height: clamp(36px, 5vw, 54px);
  max-width: 180px;
}

.hero-logo {
  margin-bottom: 26px;
}

.kicker {
  margin: 0 0 10px;
  color: var(--gold-text);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p,
li,
span {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  max-width: 1040px;
  font-size: clamp(2.25rem, 3.35vw, 3.4rem);
  line-height: 1.18;
  letter-spacing: 0;
}

h1 span {
  display: block;
}

.hero-content p:not(.kicker) {
  max-width: 720px;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(1.05rem, 1.6vw, 1.18rem);
}

.hero .kicker,
.page-hero .kicker {
  color: var(--yellow);
}

.partner .kicker {
  color: var(--gold-text);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 9px 18px;
  border: 2px solid rgba(255, 255, 255, 0.52);
  border-radius: 8px;
  font-weight: 900;
}

.button.primary {
  color: var(--navy-deep);
  background: var(--yellow);
  border-color: var(--yellow);
}

.button.secondary {
  color: var(--white);
  background: rgba(255, 255, 255, 0.06);
}

.overview,
.research,
.news,
.partner,
.members,
.contact {
  padding: clamp(44px, 7vw, 82px) clamp(18px, 6vw, 90px);
}

.overview {
  display: grid;
  grid-template-columns: minmax(200px, 0.65fr) minmax(320px, 1.35fr);
  gap: clamp(28px, 6vw, 84px);
  background: var(--white);
}

.section-title h2 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(1.85rem, 3.6vw, 2.9rem);
  line-height: 1.2;
  letter-spacing: 0;
}

.section-title.compact h2 {
  font-size: clamp(1.7rem, 3vw, 2.35rem);
}

.lead {
  display: grid;
  gap: 16px;
  color: var(--muted);
  font-size: 1.12rem;
  font-weight: 500;
}

.lead p,
.contact p {
  margin: 0;
}

.mission {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
}

.mission article {
  min-height: 220px;
  padding: clamp(22px, 3.2vw, 34px);
  background: var(--paper);
}

.mission span {
  display: inline-block;
  margin-bottom: 24px;
  color: var(--blue);
  font-size: 0.9rem;
  font-weight: 900;
}

h3 {
  margin: 0;
  color: var(--navy-deep);
  font-size: clamp(1.2rem, 2.1vw, 1.55rem);
  line-height: 1.35;
  letter-spacing: 0;
}

.mission p,
.feature p,
.publication li,
.partner p,
.member-list p,
address span {
  color: var(--muted);
}

.research {
  background: var(--white);
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.feature,
.publication {
  padding: clamp(20px, 3.2vw, 30px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 16px 34px rgba(5, 35, 57, 0.08);
}

.feature {
  border-top: 6px solid var(--cyan);
}

.publication {
  grid-column: 1 / -1;
  border-top: 6px solid var(--yellow);
}

.publication ul {
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
  padding-left: 1.2em;
}

.section-link {
  margin: 28px 0 0;
}

.section-link a {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  padding: 9px 18px;
  color: var(--navy);
  border: 2px solid var(--navy);
  border-radius: 8px;
  font-weight: 900;
}

.news {
  display: grid;
  grid-template-columns: minmax(240px, 0.55fr) minmax(320px, 1.45fr);
  gap: clamp(28px, 6vw, 80px);
  background: #eaf2f7;
}

.news-list {
  display: grid;
  border-top: 1px solid #c9d9e4;
}

.news-list article {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid #c9d9e4;
}

.news-list time {
  color: var(--navy);
  font-weight: 900;
}

.news-list p {
  margin: 0;
  color: var(--ink);
  font-size: 1.06rem;
  font-weight: 500;
}

.partner {
  display: block;
  background: var(--white);
  color: var(--ink);
}

.partner-main {
  display: flex;
  flex-direction: column;
  gap: clamp(28px, 4vw, 48px);
  width: 100%;
}

.partner-header {
  border-bottom: 1px solid var(--line);
  padding-bottom: clamp(20px, 3vw, 32px);
}

.partner-body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(24px, 5vw, 60px);
}

.partner-tmf {
  padding-top: clamp(20px, 3vw, 32px);
  border-top: 1px solid var(--line);
}

.partner-tmf-card {
  padding: clamp(20px, 3.2vw, 30px);
  background: var(--paper);
  border-left: 5px solid var(--yellow);
  border-radius: 0 8px 8px 0;
  display: inline-flex;
  flex-direction: column;
  gap: 14px;
  max-width: 100%;
}

.partner-tmf-card-header {
  display: flex;
  align-items: center;
  gap: 20px;
}

.partner-tmf-card h3 {
  margin: 0;
  color: var(--navy-deep);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
}

.partner-tmf-card p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  font-weight: 500;
}

.member-list-simple {
  display: grid;
  gap: 10px;
  margin: 8px 0 0;
  padding-left: 1.2em;
  list-style: disc;
}

.member-list-simple li {
  color: var(--muted);
  font-size: 1rem;
  font-weight: 500;
}

.partner-col {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.partner-activity-title {
  margin: 0 0 16px;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--navy-deep);
}

.partner-logo-only {
  display: flex;
  align-items: flex-start;
  padding-top: 4px;
}

.partner-logo-only img {
  height: clamp(36px, 5vw, 56px);
  width: auto;
}

.partner h3 {
  margin: 24px 0 10px;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--navy-deep);
}

.partner ul {
  margin: 12px 0 0;
  padding-left: 1.4em;
  display: grid;
  gap: 8px;
}

.partner ul li {
  color: var(--muted);
  font-size: 1rem;
}

.partner-logo-lockup {
  width: min(360px, 100%);
  max-width: 100%;
  gap: 12px;
  padding: 14px 16px;
}

.partner-logo-lockup .logo-tmf {
  height: clamp(34px, 4vw, 48px);
  max-width: 145px;
}

.partner-logo-lockup .logo-saga {
  height: clamp(36px, 4.4vw, 52px);
  max-width: 165px;
}

.partner h2 {
  margin: 0;
  font-size: clamp(1.55rem, 3.1vw, 2.5rem);
  line-height: 1.25;
  letter-spacing: 0;
  color: var(--navy);
}

.partner p:not(.kicker) {
  margin: 18px 0 0;
  color: var(--muted);
  font-weight: 500;
}

.members {
  display: grid;
  grid-template-columns: minmax(220px, 0.45fr) minmax(320px, 1.55fr);
  gap: clamp(24px, 6vw, 72px);
  background: var(--white);
}

.member-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.member-list p {
  margin: 0;
  padding: 14px 18px;
  border-left: 5px solid var(--yellow);
  background: var(--paper);
  border-radius: 0 8px 8px 0;
  font-weight: 800;
}

.contact {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(320px, 1.2fr);
  gap: clamp(28px, 6vw, 82px);
  color: var(--white);
  background: var(--navy-deep);
}

.contact h2 {
  margin: 0 0 16px;
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  letter-spacing: 0;
}

.contact p {
  color: rgba(255, 255, 255, 0.82);
}

address {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: clamp(22px, 4vw, 34px);
  font-style: normal;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
}

address span {
  color: rgba(255, 255, 255, 0.84);
}

.site-footer {
  padding: 24px clamp(18px, 6vw, 90px);
  color: var(--muted);
  background: var(--white);
  border-top: 1px solid var(--line);
}

.page-hero {
  padding: clamp(54px, 8vw, 92px) clamp(18px, 6vw, 90px);
  color: var(--white);
  background: var(--navy-deep);
  border-bottom: 7px solid var(--yellow);
}

.page-hero h1 {
  max-width: 980px;
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4rem);
}

.page-hero p:not(.kicker) {
  max-width: 820px;
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: 1.08rem;
}

.content-page {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  padding: clamp(34px, 6vw, 70px) clamp(18px, 6vw, 90px);
  background: var(--white);
}

.content-page section {
  max-width: 1100px;
  width: 100%;
  padding: clamp(20px, 3.2vw, 30px);
  border: 1px solid var(--line);
  border-left: 5px solid var(--cyan);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 14px 32px rgba(5, 35, 57, 0.07);
}

.content-page h2 {
  margin: 0 0 16px;
  color: var(--navy);
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  line-height: 1.3;
}

.content-page h3 {
  margin: 24px 0 10px;
  font-size: clamp(1.12rem, 2vw, 1.35rem);
}

.content-page p,
.content-page li,
.link-list strong,
.news-list p,
.mission p,
.feature p,
.publication li,
.member-list p {
  color: var(--ink);
  font-size: 1.06rem;
  font-weight: 500;
}

address span {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.06rem;
  font-weight: 500;
}

.content-page p {
  margin: 0 0 12px;
}

.content-page a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.record-list,
.content-page ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 1.35em;
}

.record-list li,
.content-page li {
  color: var(--muted);
}

.link-list {
  padding-left: 0;
  list-style: none;
}

.link-list li {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.link-list li:first-child {
  padding-top: 0;
}

.link-list strong {
  color: var(--ink);
}

.link-list a {
  word-break: break-all;
}

@media (max-width: 900px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .site-nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 3px;
  }

  .hero,
  .overview,
  .news,
  .contact {
    grid-template-columns: 1fr;
  }

  .partner-body {
    grid-template-columns: 1fr;
  }

  .partner-tmf {
    flex-direction: column;
  }

  .hero {
    min-height: auto;
  }

  .mission,
  .research-grid,
  .member-list {
    grid-template-columns: 1fr;
  }

  .news-list article {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}

@media (max-width: 560px) {
  .brand img {
    width: 54px;
    height: 54px;
  }

  .brand-divider {
    height: 28px;
  }

  .brand span {
    font-size: 0.82rem;
    white-space: normal;
  }

  .site-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 14px;
    overflow: visible;
    white-space: normal;
  }

  .site-nav a {
    min-height: 30px;
  }

  .hero::before {
    display: none;
  }

  .hero-actions {
    flex-direction: column;
  }

  .logo-lockup {
    width: 100%;
    justify-content: center;
    gap: 10px;
    padding: 12px;
  }

  .logo-tmf {
    height: 36px;
    max-width: 120px;
  }

  .logo-saga {
    height: 36px;
    max-width: 120px;
  }

  h1 {
    font-size: clamp(2rem, 9vw, 3rem);
  }

  h1 span {
    display: inline;
  }

  .button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .slide {
    opacity: 1;
    animation: none;
  }

  .slide:not(.slide-1) {
    display: none;
  }
}

.under-construction {
  color: #8fa0ad;
  font-style: italic;
  font-size: 0.95rem;
  margin: 0;
}