:root {
  --navy: #17324d;
  --navy-deep: #10263b;
  --blue: #1768aa;
  --ink: #25313c;
  --muted: #5c6874;
  --line: #d9e0e6;
  --soft: #f4f7f9;
  --blue-soft: #edf4f8;
  --white: #ffffff;
  --sans: "Hiragino Sans", "Yu Gothic", "YuGothic", "Noto Sans JP", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 82px; }
body { margin: 0; background: var(--white); color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.9; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
p, h1, h2, h3, figure, dl, dd { margin-top: 0; }

.site-header { height: 82px; position: sticky; top: 0; z-index: 20; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .97); }
.header-inner { width: min(1200px, calc(100% - 48px)); height: 100%; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
.brand { width: 72px; height: 62px; display: grid; place-items: center; overflow: hidden; }
.brand img { width: 69px; height: 60px; object-fit: contain; mix-blend-mode: multiply; }
.desktop-nav { display: flex; align-items: center; gap: 29px; color: #3d4c5a; font-size: 12px; font-weight: 700; }
.desktop-nav a { padding: 8px 0; border-bottom: 2px solid transparent; }
.desktop-nav a:hover { color: var(--blue); border-color: var(--blue); }
.mobile-nav { display: none; }

.hero { border-bottom: 1px solid var(--line); background: var(--soft); }
.hero-inner { width: min(1120px, calc(100% - 48px)); min-height: 530px; margin: 0 auto; display: grid; grid-template-columns: 1.22fr .78fr; gap: 70px; }
.hero-copy { padding: 82px 0 76px; align-self: center; }
.eyebrow, .section-label { margin: 0 0 22px; color: var(--blue); font-size: 12px; line-height: 1.5; font-weight: 700; letter-spacing: .08em; }
.hero h1 { margin-bottom: 30px; color: var(--navy-deep); font-size: clamp(34px, 3.6vw, 48px); line-height: 1.48; letter-spacing: -.025em; font-weight: 700; }
.hero-description { max-width: 680px; color: #425260; }
.hero-description p { margin-bottom: 13px; line-height: 2; }
.primary-link { width: fit-content; min-width: 238px; min-height: 56px; margin-top: 28px; padding: 0 20px; display: inline-flex; align-items: center; justify-content: space-between; gap: 28px; background: var(--navy); color: #fff; font-size: 14px; font-weight: 700; }
.primary-link:hover { background: var(--blue); }
.hero-photo { height: 330px; margin: 0; align-self: center; overflow: hidden; }
.hero-photo img { width: 100%; height: 100%; object-fit: cover; object-position: center 48%; filter: saturate(.68); }

.section { width: min(1120px, calc(100% - 48px)); margin: 0 auto; padding: 108px 0; }
.section-heading h2, .business-intro h2, .future h2, .company-heading h2 { margin-bottom: 0; color: var(--navy-deep); font-size: clamp(29px, 3vw, 39px); line-height: 1.55; letter-spacing: -.02em; }
.prose { color: #455562; }
.prose p { margin-bottom: 19px; line-height: 2.05; }
.prose p:last-child { margin-bottom: 0; }

.about { display: grid; grid-template-columns: .7fr 1.3fr; gap: 94px; }
.section-heading { align-self: start; }
.about-content { min-width: 0; }
.prose-large { padding-top: 30px; border-top: 2px solid var(--navy); }

.business { background: var(--blue-soft); }
.business-inner { width: min(1200px, calc(100% - 48px)); }
.business-intro { display: grid; grid-template-columns: .72fr 1.28fr; column-gap: 92px; align-items: start; }
.business-intro .section-label { grid-column: 1 / -1; }
.intro-copy { padding-top: 19px; }
.business-grid { margin-top: 62px; border-top: 2px solid var(--navy); }
.business-card { min-height: 0; padding: 31px 0; display: grid; grid-template-columns: 70px 300px 1fr; gap: 28px; align-items: start; border-bottom: 1px solid #c9d6df; }
.card-number { display: block; padding-top: 3px; color: var(--blue); font-size: 12px; font-weight: 700; }
.business-card h3 { margin: 0; color: var(--navy-deep); font-size: 19px; line-height: 1.7; }
.business-card-copy p { margin: 0 0 12px; color: #4c5c69; font-size: 14px; line-height: 2; }
.business-card-copy p:last-child { margin-bottom: 0; }

.products { border-bottom: 1px solid var(--line); }
.products-heading { padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.products-heading .section-label { margin-bottom: 0; }
.product-list { margin-top: 32px; display: grid; grid-template-columns: repeat(auto-fill, minmax(360px, 1fr)); gap: 24px; align-items: start; }
.product-card { padding: 28px; border: 1px solid var(--line); background: #fff; }
.product-card-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; }
.product-card h2 { margin: 0; color: var(--navy-deep); font-size: 24px; line-height: 1.5; }
.product-catch { margin: 10px 0 0; color: var(--navy); font-size: 14px; font-weight: 700; line-height: 1.8; }
.product-card-copy { margin-top: 26px; padding-top: 23px; border-top: 1px solid var(--line); font-size: 14px; }
.service-logo-link { width: 132px; padding: 8px 10px 6px; flex: none; display: block; border: 1px solid var(--line); background: #fff; transition: border-color .2s ease, transform .2s ease; }
.service-logo-link:hover { border-color: var(--blue); transform: translateY(-2px); }
.service-logo-link:focus-visible { outline: 3px solid rgba(23, 104, 170, .28); outline-offset: 3px; }
.service-logo-link img { width: 100%; height: auto; }

.future { padding: 108px 24px; background: var(--navy); color: #fff; }
.future-inner { width: min(1120px, 100%); margin: 0 auto; }
.future .section-label { color: #acd0e8; }
.future-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 94px; }
.future h2 { color: #fff; }
.future-copy { padding-top: 30px; border-top: 1px solid rgba(255,255,255,.34); color: #e6edf2; }
.future-origin { color: #fff; font-size: 19px; font-weight: 700; }

.company { display: grid; grid-template-columns: .6fr 1.4fr; gap: 100px; }
.company-table { margin: 0; border-top: 2px solid var(--navy); }
.company-table > div { min-height: 80px; padding: 20px 0; display: grid; grid-template-columns: 150px 1fr; align-items: start; border-bottom: 1px solid var(--line); }
.company-table dt { padding-top: 1px; color: #5b6874; font-size: 13px; font-weight: 700; }
.company-table dd { margin: 0; color: #2f3d49; font-size: 15px; line-height: 1.85; }
.officer-list { display: grid; gap: 2px; }
.company-business-list { margin: 0; padding: 0; list-style: none; }
.company-business-list li { position: relative; padding-left: 17px; }
.company-business-list li::before { content: "-"; position: absolute; left: 0; }

.contact { padding: 88px 24px; background: var(--soft); text-align: center; }
.contact-inner { width: min(880px, 100%); margin: 0 auto; }
.contact h2 { margin: 0; color: var(--navy-deep); font-size: 18px; line-height: 1.9; letter-spacing: 0; font-weight: 700; }
.contact h2 + p { margin: 23px 0 0; color: var(--muted); }

footer { padding: 60px max(24px, calc((100% - 1120px) / 2)) 24px; background: #fff; }
.footer-inner { min-height: 180px; display: grid; grid-template-columns: 120px 1fr auto; gap: 58px; align-items: start; }
.footer-brand { width: 98px; }
.footer-brand img { mix-blend-mode: multiply; }
.footer-meta p { margin: 0 0 7px; color: #62707b; font-size: 12px; }
.footer-meta p:first-child { margin-bottom: 11px; color: var(--navy-deep); font-size: 15px; font-weight: 700; }
.footer-links { min-width: 270px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px 30px; font-size: 11px; font-weight: 700; }
.footer-links a:hover { color: var(--blue); }
.photo-credit { margin: 0; padding-top: 18px; border-top: 1px solid var(--line); color: #7c8791; font-size: 9px; text-align: right; }
.photo-credit a { text-decoration: underline; }

@media (max-width: 980px) {
  .desktop-nav { gap: 18px; }
  .hero-inner { gap: 48px; }
  .about, .company, .future-grid { gap: 60px; }
  .business-intro { column-gap: 60px; }
  .business-card { grid-template-columns: 60px 240px 1fr; gap: 24px; }
}

@media (max-width: 760px) {
  html { scroll-padding-top: 74px; }
  body { font-size: 15px; }
  .site-header { height: 74px; }
  .header-inner { width: calc(100% - 36px); }
  .brand { width: 62px; height: 56px; }
  .brand img { width: 60px; height: 54px; }
  .desktop-nav { display: none; }
  .mobile-nav { display: block; position: relative; }
  .mobile-nav summary { list-style: none; cursor: pointer; color: var(--navy); font-size: 12px; font-weight: 700; }
  .mobile-nav summary::-webkit-details-marker { display: none; }
  .mobile-nav nav { width: min(290px, calc(100vw - 36px)); padding: 12px 18px; position: absolute; top: 38px; right: 0; display: grid; background: var(--navy); color: #fff; box-shadow: 0 12px 32px rgba(16, 36, 58, .18); }
  .mobile-nav nav a { padding: 10px 3px; border-bottom: 1px solid rgba(255,255,255,.2); font-size: 12px; }
  .hero-inner { width: 100%; min-height: auto; grid-template-columns: 1fr; }
  .hero-copy { padding: 66px 20px 58px; }
  .hero h1 { font-size: clamp(30px, 8.5vw, 38px); }
  .hero h1 br { display: none; }
  .hero-photo { height: 250px; min-height: 0; margin: 0 20px 44px; }
  .section { width: calc(100% - 40px); padding: 82px 0; }
  .section-heading h2, .business-intro h2, .future h2, .company-heading h2 { font-size: clamp(28px, 8vw, 35px); }
  .about, .business-intro, .future-grid, .company { grid-template-columns: 1fr; }
  .about, .company, .future-grid { gap: 46px; }
  .business-inner { width: calc(100% - 40px); }
  .business-intro .section-label { grid-column: auto; }
  .business-grid { margin-top: 48px; }
  .business-card { padding: 26px 0; grid-template-columns: 42px 1fr; gap: 10px 14px; }
  .business-card-copy { grid-column: 2; }
  .product-list { grid-template-columns: 1fr; }
  .product-card { padding: 22px 20px; }
  .product-card-header { gap: 16px; }
  .product-card h2 { font-size: 21px; }
  .product-catch { font-size: 13px; }
  .service-logo-link { width: 112px; }
  .future { padding: 82px 20px; }
  .company-table > div { padding: 20px 0; grid-template-columns: 108px 1fr; }
  .contact { padding: 74px 20px; }
  footer { padding: 48px 20px 22px; }
  .footer-inner { min-height: 0; grid-template-columns: 82px 1fr; gap: 32px 26px; }
  .footer-brand { width: 78px; }
  .footer-links { grid-column: 1 / -1; min-width: 0; padding: 24px 0 34px; border-top: 1px solid var(--line); }
  .photo-credit { text-align: left; line-height: 1.7; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}