:root {
  --color-bg: #0e1119;
  --color-surface: #141927;
  --color-surface-alt: rgba(20, 25, 39, 0.7);
  --color-primary: #3c7bff;
  --color-secondary: #18d3c3;
  --color-text: #f5f7ff;
  --color-muted: rgba(245, 247, 255, 0.72);
  --color-line: rgba(255, 255, 255, 0.1);
  --radius-lg: 24px;
  --radius-md: 16px;
  --max-width: 1180px;
  --shadow: 0 24px 60px rgba(8, 12, 24, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', 'Noto Sans JP', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--color-text);
  background: radial-gradient(circle at top left, rgba(60, 123, 255, 0.18), transparent 55%),
              radial-gradient(circle at bottom right, rgba(24, 211, 195, 0.16), transparent 60%),
              var(--color-bg);
  line-height: 1.6;
}

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

a:hover,
 a:focus {
  color: var(--color-secondary);
}

img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
}

.container {
  width: min(calc(100% - 48px), var(--max-width));
  margin-inline: auto;
}

.section {
  padding-block: clamp(80px, 14vw, 120px);
}

.section-head {
  max-width: 640px;
  margin: 0 auto clamp(48px, 8vw, 64px);
  text-align: center;
}

.section-head h2 {
  margin: 0 0 12px;
  font-size: clamp(2.2rem, 4vw, 2.8rem);
}

.section-head p {
  margin: 0;
  color: var(--color-muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease;
  border: 1px solid transparent;
}

.btn-solid {
  background: linear-gradient(140deg, var(--color-primary), #264cff);
  color: #fff;
  box-shadow: 0 18px 36px rgba(60, 123, 255, 0.4);
}

.btn-solid:hover {
  transform: translateY(-2px);
  box-shadow: 0 26px 46px rgba(60, 123, 255, 0.5);
}

.btn-outline {
  border-color: rgba(255, 255, 255, 0.4);
  color: var(--color-text);
  background: transparent;
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn-ghost {
  border-color: transparent;
  background: rgba(60, 123, 255, 0.12);
}

.btn-ghost:hover {
  background: rgba(60, 123, 255, 0.2);
}

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(22px);
  background: rgba(14, 17, 25, 0.75);
  border-bottom: 1px solid var(--color-line);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--color-text);
}

.logo-mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, rgba(60, 123, 255, 0.95), rgba(24, 211, 195, 0.95));
  border-radius: 16px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.logo-type {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-type strong {
  font-weight: 600;
}

.logo-type small {
  color: var(--color-muted);
  font-size: 0.82rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-weight: 500;
}

.nav a {
  position: relative;
  padding-block: 8px;
}

.nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-secondary);
  transition: width 0.2s ease;
}

.nav a:hover::after {
  width: 100%;
}

.nav-trigger {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.6rem;
}

.hero {
  position: relative;
  padding-top: clamp(120px, 18vw, 180px);
  padding-bottom: clamp(80px, 14vw, 140px);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(60, 123, 255, 0.28), rgba(24, 211, 195, 0.18));
  opacity: 0.6;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(40px, 6vw, 72px);
  align-items: center;
}

.hero-label {
  margin: 0 0 16px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: rgba(245, 247, 255, 0.7);
}

.hero h1 {
  margin: 0 0 18px;
  font-size: clamp(2.8rem, 5vw, 3.8rem);
  line-height: 1.15;
}

.hero-copy {
  color: var(--color-muted);
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 32px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 18px;
  margin: 0;
}

.hero-stats dt {
  font-weight: 600;
}

.hero-stats dd {
  margin: 6px 0 0;
  color: var(--color-muted);
}

.hero-media img {
  box-shadow: var(--shadow);
}

.split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(30px, 6vw, 60px);
  align-items: start;
}

.info-cards {
  display: grid;
  gap: 24px;
  margin-top: 36px;
}

.info-cards article {
  padding: 28px;
  border-radius: var(--radius-md);
  background: rgba(20, 25, 39, 0.8);
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow);
}

.info-cards h3 {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.1rem;
  margin: 0 0 16px;
}

.info-cards ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  color: var(--color-muted);
}

.about-panel {
  padding: 32px;
  background: rgba(20, 25, 39, 0.9);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow);
}

.about-panel h3 {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 0;
}

.about-panel ul {
  list-style: disc;
  padding-left: 20px;
  margin-bottom: 0;
  color: var(--color-muted);
}

.philosophy {
  background: rgba(14, 17, 25, 0.65);
}

.pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.pillars article {
  padding: 32px;
  border-radius: var(--radius-lg);
  background: rgba(20, 25, 39, 0.75);
  border: 1px solid var(--color-line);
  text-align: center;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.pillars i {
  font-size: 2rem;
  color: var(--color-secondary);
  margin-bottom: 16px;
}

.pillars h3 {
  margin: 0 0 12px;
}

.pillars p {
  color: var(--color-muted);
  margin: 0;
}

.domains {
  background: rgba(10, 14, 26, 0.85);
}

.domain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 22px;
}

.domain-grid article {
  padding: 24px;
  border-radius: var(--radius-md);
  background: rgba(20, 25, 39, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.domain-grid article:hover {
  transform: translateY(-6px);
  border-color: rgba(24, 211, 195, 0.6);
}

.domain-grid i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  margin-bottom: 14px;
  background: rgba(60, 123, 255, 0.2);
  color: var(--color-primary);
  font-size: 1.2rem;
}

.domain-grid h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
}

.domain-grid p {
  margin: 0;
  color: var(--color-muted);
}

.timeline {
  background: rgba(14, 17, 25, 0.65);
}

.timeline-list {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: 580px;
  display: grid;
  gap: 20px;
}

.timeline-list li {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 18px;
  padding: 20px 26px;
  background: rgba(20, 25, 39, 0.82);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow);
}

.timeline-list .year {
  font-weight: 600;
  color: var(--color-secondary);
}

.timeline-list .event {
  color: var(--color-text);
}

.highlight {
  background: rgba(8, 12, 26, 0.9);
}

.highlight-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: clamp(32px, 6vw, 60px);
  align-items: center;
}

.highlight-grid figure img {
  box-shadow: var(--shadow);
}

.highlight-grid h2 {
  margin: 0 0 16px;
  font-size: clamp(2.2rem, 4vw, 2.8rem);
}

.highlight-grid p {
  color: var(--color-muted);
  margin-bottom: 24px;
}

.recruit {
  background: rgba(14, 17, 25, 0.65);
}

.recruit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.recruit-grid article {
  padding: 28px;
  border-radius: var(--radius-md);
  background: rgba(20, 25, 39, 0.78);
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow);
}

.recruit-grid h3 {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 14px;
}

.recruit-grid ul {
  margin: 0;
  padding-left: 18px;
  color: var(--color-muted);
  display: grid;
  gap: 10px;
}

.recruit-grid p {
  margin: 0 0 14px;
  color: var(--color-muted);
}

.recruit-cta {
  text-align: center;
  margin-top: 48px;
  color: var(--color-muted);
}

.partners {
  background: rgba(8, 12, 22, 0.9);
}

.partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.partner-grid article {
  padding: 28px;
  border-radius: var(--radius-md);
  background: rgba(20, 25, 39, 0.78);
  border: 1px solid var(--color-line);
  text-align: center;
  box-shadow: var(--shadow);
}

.partner-grid i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 20px;
  background: rgba(24, 211, 195, 0.15);
  color: var(--color-secondary);
  font-size: 1.6rem;
  margin-bottom: 16px;
}

.partner-grid h3 {
  margin: 0 0 12px;
}

.partner-grid p {
  margin: 0;
  color: var(--color-muted);
}

.partners-cta {
  text-align: center;
  margin-top: 36px;
}

.contact {
  background: rgba(14, 17, 25, 0.65);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: clamp(30px, 5vw, 56px);
  align-items: center;
}

.contact-grid h2 {
  margin: 0 0 16px;
}

.contact-grid p {
  color: var(--color-muted);
  margin-bottom: 24px;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 14px;
  color: var(--color-muted);
}

.contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.contact-list i {
  color: var(--color-secondary);
  margin-top: 4px;
}

.footer {
  padding: 40px 0;
  text-align: center;
  color: rgba(245, 247, 255, 0.6);
  background: rgba(6, 8, 16, 0.95);
  border-top: 1px solid var(--color-line);
}

.footer .credit {
  font-size: 0.82rem;
  margin: 8px 0 0;
}

.fade-in {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.in-view {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .nav {
    position: absolute;
    top: 76px;
    right: 24px;
    flex-direction: column;
    background: rgba(14, 17, 25, 0.95);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    overflow: hidden;
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.25s ease;
  }

  .nav a {
    padding: 14px 24px;
    width: 220px;
  }

  .nav.open {
    transform: scaleY(1);
  }

  .nav-trigger {
    display: inline-flex;
  }

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

  .hero-media img {
    opacity: 0.9;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(calc(100% - 32px), var(--max-width));
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .timeline-list li {
    grid-template-columns: 1fr;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-actions {
    gap: 12px;
  }
}