:root {
  --color-bg: #0f172a;
  --color-surface: rgba(15, 23, 42, 0.85);
  --color-card: #ffffff;
  --color-accent: #2563eb;
  --color-accent-dark: #1d4ed8;
  --color-secondary: #f97316;
  --color-text: #0f172a;
  --color-text-light: #64748b;
  --color-border: rgba(148, 163, 184, 0.25);
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --shadow-soft: 0 18px 50px rgba(15, 23, 42, 0.16);
  --shadow-card: 0 8px 30px rgba(15, 23, 42, 0.12);
  --transition-base: 0.3s ease;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", "Microsoft JhengHei", sans-serif;
  color: var(--color-text);
  background: linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);
  line-height: 1.6;
}

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

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

a:hover {
  text-decoration: none;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.section {
  padding: 96px 0;
}

.section-inner {
  display: grid;
  gap: 48px;
}

.section-heading {
  display: grid;
  gap: 12px;
  max-width: 640px;
}

.section-heading h2 {
  font-size: clamp(2rem, 3vw, 2.6rem);
  margin: 0;
  color: var(--color-bg);
}

.section-heading p {
  margin: 0;
  color: var(--color-text-light);
  font-size: 1.05rem;
}

.section-eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-secondary);
  font-weight: 600;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 16px;
  background: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  z-index: 999;
  transition: transform var(--transition-base);
}

.skip-link:focus {
  top: 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(18px);
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid var(--color-border);
}

.site-header.scrolled {
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 32px;
}

.branding {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  color: var(--color-bg);
}

.logo-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-accent) 0%, #60a5fa 100%);
  color: #fff;
  font-weight: 700;
}

.brand-name {
  font-size: 1rem;
  display: block;
}

.brand-sub {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

.main-nav {
  display: flex;
  gap: 24px;
  font-size: 0.95rem;
  align-items: center;
}

.nav-link {
  position: relative;
  padding: 8px 0;
  color: var(--color-text-light);
  transition: color var(--transition-base);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link:focus {
  color: var(--color-accent);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  border: none;
  background: var(--color-accent);
  color: #fff;
  border-radius: 12px;
  padding: 10px 14px;
  font-size: 1.2rem;
  cursor: pointer;
}

.hero {
  position: relative;
  padding: 140px 0 120px;
  color: #fff;
  background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.55), rgba(15, 23, 42, 0.9)), url("../images/hero.jpg") center/cover no-repeat;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.65) 0%, rgba(15, 23, 42, 0.88) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
  max-width: 640px;
}

.hero-eyebrow {
  font-size: 0.95rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.75);
}

.hero-title {
  margin: 0;
  font-size: clamp(2.6rem, 4vw, 3.3rem);
  line-height: 1.1;
}

.hero-subtitle {
  margin: 0;
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.85);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 600;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  cursor: pointer;
  border: none;
}

.btn.primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, #3b82f6 100%);
  color: #fff;
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.35);
}

.btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 32px rgba(37, 99, 235, 0.4);
}

.btn.secondary {
  background: rgba(37, 99, 235, 0.12);
  color: var(--color-accent);
  border: 1px solid rgba(37, 99, 235, 0.4);
}

.btn.ghost {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.btn.ghost:hover,
.btn.secondary:hover {
  transform: translateY(-2px);
}

.hero-metrics {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.metric {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 18px 22px;
  border-radius: var(--radius-md);
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.metric-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: rgba(37, 99, 235, 0.35);
  font-size: 1.3rem;
}

.metric-value {
  margin: 0;
  font-weight: 600;
  font-size: 1.2rem;
}

.metric-label {
  margin: 0;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9rem;
}

.about {
  background: #ffffff;
}

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

.about-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  display: grid;
  gap: 20px;
}

.about-card h3 {
  margin: 0;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-bg);
}

.about-card dt {
  font-weight: 600;
  color: var(--color-text);
}

.about-card dd {
  margin: 4px 0 12px;
  color: var(--color-text-light);
}

.icon-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

.icon-list li {
  display: flex;
  gap: 12px;
  color: var(--color-text-light);
}

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

.icon-list.compact li {
  align-items: center;
}

.card-grid {
  display: grid;
  gap: 24px;
}

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

.service-card {
  background: #fff;
  padding: 28px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  box-shadow: var(--shadow-card);
  display: grid;
  gap: 18px;
  transition: transform var(--transition-base), border var(--transition-base), box-shadow var(--transition-base);
}

.service-card i {
  font-size: 1.7rem;
  color: var(--color-accent);
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: rgba(37, 99, 235, 0.25);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.14);
}

.callout {
  padding: 36px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08) 0%, rgba(59, 130, 246, 0.18) 100%);
  border: 1px solid rgba(37, 99, 235, 0.25);
  display: grid;
  gap: 16px;
  align-items: start;
}

.split {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 41, 59, 0.95) 100%), url("../images/hero.jpg") center/cover no-repeat;
  color: #fff;
  position: relative;
}

.split::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(15, 23, 42, 0.9) 30%, rgba(15, 23, 42, 0.75) 100%);
}

.split-inner {
  position: relative;
  z-index: 1;
  gap: 40px;
  align-items: start;
}

.split .section-heading h2,
.split .section-heading p {
  color: #fff;
}

.split .section-eyebrow {
  color: rgba(249, 115, 22, 0.85);
}

.split-text {
  display: grid;
  gap: 24px;
  flex: 1;
}

.split-panel {
  background: rgba(15, 23, 42, 0.75);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(148, 163, 184, 0.25);
  padding: 32px;
  display: grid;
  gap: 24px;
  box-shadow: var(--shadow-soft);
}

.pill-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 14px;
}

.pill-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
}

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

.stat-group {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
}

.stat {
  display: grid;
  gap: 4px;
  text-align: center;
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 700;
}

.stat-label {
  font-size: 0.85rem;
  color: rgba(226, 232, 240, 0.8);
}

.panel-note {
  margin: 0;
  font-size: 0.85rem;
  color: rgba(226, 232, 240, 0.7);
}

.timeline {
  background: #f1f5f9;
}

.timeline-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 40px;
  position: relative;
}

.timeline-list::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: rgba(148, 163, 184, 0.4);
}

.timeline-item {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding-left: 48px;
  position: relative;
}

.timeline-dot {
  position: absolute;
  left: 12px;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--color-accent);
}

.timeline-year {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-accent);
}

.timeline-content {
  background: #fff;
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.3);
  box-shadow: var(--shadow-card);
  display: grid;
  gap: 12px;
}

.timeline-content h3 {
  margin: 0;
}

.careers {
  background: #fff;
}

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

.career-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-card);
  display: grid;
  gap: 16px;
}

.career-card h3 {
  margin: 0;
  display: flex;
  gap: 12px;
  align-items: center;
  color: var(--color-bg);
}

.career-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--color-text-light);
  display: grid;
  gap: 8px;
}

.career-cta {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08) 0%, rgba(59, 130, 246, 0.18) 100%);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.partners {
  background: #f8fafc;
}

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

.partner-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  display: grid;
  gap: 16px;
}

.partner-card i {
  font-size: 1.6rem;
  color: var(--color-accent);
}

.partner-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--color-text-light);
  display: grid;
  gap: 8px;
}

.contact {
  background: #fff;
}

.contact-inner {
  display: grid;
  gap: 36px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: stretch;
}

.contact-details {
  display: grid;
  gap: 24px;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 16px;
}

.contact-list li {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 16px;
  color: var(--color-text-light);
}

.contact-list i {
  color: var(--color-accent);
  font-size: 1.1rem;
  padding-top: 4px;
}

.contact-card {
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.08) 0%, rgba(59, 130, 246, 0.18) 100%);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid rgba(37, 99, 235, 0.2);
  box-shadow: var(--shadow-card);
  display: grid;
  gap: 18px;
}

.site-footer {
  background: #0f172a;
  color: rgba(248, 250, 252, 0.85);
  padding: 36px 0;
}

.footer-inner {
  width: min(1100px, 92vw);
  margin: 0 auto;
  display: flex;
  gap: 28px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.footer-links,
.footer-contact {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 0.9rem;
}

.footer-contact i {
  margin-right: 6px;
}

.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: rgba(15, 23, 42, 0.85);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.25);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.to-top:hover {
  transform: translateY(-3px);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s ease, transform 0.8s ease;
  transition-delay: var(--delay, 0s);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 960px) {
  .main-nav {
    position: fixed;
    inset: 72px 16px auto;
    display: grid;
    gap: 16px;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-soft);
    transform: translateY(-20px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base), transform var(--transition-base);
  }

  .site-header.nav-open .main-nav {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

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

  .header-inner {
    gap: 16px;
  }
}

@media (max-width: 768px) {
  .hero {
    padding: 120px 0 80px;
  }

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

  .timeline-list::before {
    left: 10px;
  }

  .timeline-item {
    padding-left: 36px;
  }

  .timeline-dot {
    left: 2px;
  }

  .career-cta {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 540px) {
  .hero-title {
    font-size: 2.2rem;
  }

  .section {
    padding: 72px 0;
  }

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

  .partner-actions,
  .career-grid,
  .about-grid,
  .services-grid {
    grid-template-columns: 1fr;
  }
}