:root {
  --bg: #f6f9fb;
  --text: #0f172a;
  --muted: #5f6c7b;
  --primary: #1f6feb;
  --primary-dark: #1b50b3;
  --accent: #12b3b3;
  --card-bg: #ffffff;
  --border: #d5dfe9;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Noto Sans JP', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

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

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

.container {
  width: min(1180px, 90vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(246, 249, 251, 0.85);
  border-bottom: 1px solid rgba(213, 223, 233, 0.7);
}

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

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 0;
  gap: 1rem;
}

.brand {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand__mark {
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: 0.08em;
}

.brand__tag {
  font-size: 0.75rem;
  color: var(--muted);
}

.nav {
  display: flex;
  gap: 1.5rem;
  font-size: 0.95rem;
  color: var(--muted);
}

.nav a:hover {
  color: var(--primary);
}

.nav a.is-active {
  color: var(--primary);
  font-weight: 600;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.8rem;
  border-radius: 999px;
  border: none;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(31, 111, 235, 0.25);
  background: var(--primary-dark);
}

.btn--ghost {
  background: transparent;
  border: 1px solid rgba(15, 23, 42, 0.2);
  color: var(--text);
  box-shadow: none;
}

.hero {
  padding: 6rem 0 4rem;
  background: radial-gradient(circle at 10% 20%, rgba(18, 179, 179, 0.2), transparent 55%),
    radial-gradient(circle at 90% 10%, rgba(31, 111, 235, 0.25), transparent 45%);
}

.hero .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 3rem;
  align-items: center;
}

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

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.hero p {
  color: var(--muted);
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.hero__card {
  background: var(--card-bg);
  border-radius: 1.5rem;
  padding: 2rem;
  box-shadow: 0 25px 40px rgba(15, 23, 42, 0.08);
}

.metrics {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.metrics__value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
}

.metrics__label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
}

.section {
  padding: 5rem 0;
}

.section--soft {
  background: #ffffff;
}

.section--accent {
  background: #0f172a;
  color: #f8fbff;
}

.section--accent .section__lead {
  color: rgba(248, 251, 255, 0.8);
}

.section--accent .card {
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.section--timeline {
  background: linear-gradient(135deg, #f0f4ff, #f5f8fb);
}

.section--cta {
  background: #0f172a;
  color: white;
}

.section--cta .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  align-items: center;
}

.section h2 {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  margin-top: 0.5rem;
}

.section__lead {
  max-width: 720px;
  margin-top: 1rem;
  color: var(--muted);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 3rem;
  align-items: start;
}

.stats {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.stats strong {
  display: block;
  font-size: 1.8rem;
  color: var(--primary);
}

.stats__label {
  font-size: 0.85rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.list {
  padding-left: 1.2rem;
  color: var(--muted);
}

.list li + li {
  margin-top: 0.4rem;
}

.mission-card {
  background: var(--card-bg);
  border-radius: 1.2rem;
  padding: 2rem;
  border: 1px solid var(--border);
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.05);
}

.mission-card h3 {
  margin-top: 0;
}

.company-card {
  background: radial-gradient(circle at 10% 10%, rgba(31, 111, 235, 0.15), rgba(255, 255, 255, 0.95));
  border-radius: 1.5rem;
  padding: 2.3rem;
  border: 1px solid rgba(31, 111, 235, 0.15);
  box-shadow: 0 25px 50px rgba(15, 23, 42, 0.08);
}

.company-card dl {
  margin: 0;
}

.company-card dt {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  margin-top: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.company-card dd {
  margin: 0.2rem 0 0;
  font-size: 1rem;
}

.company-card a {
  color: var(--primary);
  font-weight: 600;
}

.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.25rem 0;
}

.pill {
  padding: 0.35rem 1rem;
  border-radius: 999px;
  background: rgba(31, 111, 235, 0.1);
  color: var(--primary);
  font-size: 0.85rem;
}

.note {
  color: var(--muted);
  font-size: 0.9rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.card {
  padding: 1.8rem;
  border-radius: 1.2rem;
  background: var(--card-bg);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.platform-grid h4 {
  margin-bottom: 0.5rem;
}

.solutions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.solution {
  background: var(--card-bg);
  border-radius: 1.2rem;
  padding: 1.8rem;
  border: 1px solid var(--border);
  min-height: 100%;
}

.timeline {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.timeline__item {
  background: #fff;
  border-radius: 1rem;
  padding: 1.5rem;
  border: 1px solid var(--border);
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.08);
}

.timeline__year {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
}

.section--timeline .timeline__item {
  background: rgba(255, 255, 255, 0.8);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.team-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 1.2rem;
  padding: 1.8rem;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.05);
  min-height: 100%;
}

.news-list {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

.news-item {
  background: var(--card-bg);
  border-radius: 1rem;
  padding: 1.5rem;
  border: 1px solid var(--border);
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.05);
}

.news-item__date {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--muted);
}

.news-btn {
  margin-top: 2rem;
}

.recruit-cta {
  margin-top: 2.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  background: rgba(31, 111, 235, 0.08);
  border-radius: 1rem;
  padding: 1.8rem;
}

.section--cta p {
  color: rgba(255, 255, 255, 0.85);
}

.contact-form {
  background: rgba(15, 18, 35, 0.6);
  padding: 2rem;
  border-radius: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-form label {
  display: flex;
  flex-direction: column;
  font-weight: 500;
  gap: 0.35rem;
}

.contact-form input,
.contact-form textarea {
  border-radius: 0.6rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  padding: 0.9rem 1rem;
  font-size: 1rem;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.site-footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
  background: #fff;
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.2rem;
  color: var(--primary);
  font-weight: 600;
}

@media (max-width: 768px) {
  .site-header .container {
    flex-wrap: wrap;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
    flex-wrap: wrap;
  }

  .metrics {
    flex-direction: column;
    gap: 1rem;
  }

  .contact-form {
    padding: 1.5rem;
  }
}