:root {
  --navy: #102b43;
  --navy-2: #173d5c;
  --blue: #1169a3;
  --sky: #8fd1ff;
  --ink: #10283d;
  --muted: #607080;
  --line: #d7e0e7;
  --soft: #f2f5f7;
  --white: #fff;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: #fff; font-family: "Noto Sans JP", "Yu Gothic", "Hiragino Kaku Gothic ProN", system-ui, sans-serif; line-height: 1.75; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
.container { width: min(calc(100% - 48px), var(--max)); margin-inline: auto; }
.narrow { max-width: 980px; }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 999; padding: 10px 16px; background: #fff; color: var(--navy); box-shadow: 0 3px 20px #0002; }
.skip-link:focus { top: 12px; }

.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.96); border-bottom: 1px solid rgba(16,43,67,.12); backdrop-filter: blur(12px); }
.header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .03em; }
.brand-mark { position: relative; width: 24px; height: 24px; border: 2px solid currentColor; display: inline-grid; place-items: center; }
.brand-mark i { width: 7px; height: 7px; border-radius: 50%; background: var(--sky); }
.desktop-nav { display: flex; align-items: center; gap: 28px; font-size: .875rem; font-weight: 700; }
.desktop-nav a:not(.nav-cta):hover { color: var(--blue); }
.nav-cta { padding: 11px 18px; background: var(--navy); color: #fff; }
.nav-cta:hover { background: var(--blue); }
.menu-button, .mobile-nav { display: none; }

.hero { background: var(--navy); color: #fff; padding: 76px 0 0; }
.hero-grid { display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: clamp(40px, 7vw, 92px); }
.eyebrow { margin: 0 0 12px; color: var(--blue); font-size: .75rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow.light { color: var(--sky); }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { margin: 0 0 22px; font-size: clamp(2.55rem, 5.2vw, 4.8rem); line-height: 1.16; letter-spacing: -.035em; }
.hero-lead { margin: 0; max-width: 570px; color: #d4e2ee; font-size: 1rem; }
.hero-actions { display: flex; align-items: center; gap: 26px; margin-top: 30px; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; border: 0; padding: 12px 24px; font-weight: 800; cursor: pointer; transition: transform .2s, background .2s, color .2s; }
.button:hover { transform: translateY(-2px); }
.button-white { background: #fff; color: var(--navy); }
.button-white:hover { background: var(--sky); }
.button-primary { background: var(--blue); color: #fff; }
.button-primary:hover { background: var(--navy-2); }
.text-link { font-size: .875rem; font-weight: 800; }
.light-link { color: #fff; border-bottom: 1px solid #ffffff77; }
.hero-note { margin: 14px 0 0; color: #9fb3c3; font-size: .77rem; }
.hero-visual { margin: 0; }
.hero-visual img { width: 100%; height: 410px; object-fit: cover; box-shadow: 22px 22px 0 #0b2236; }
.hero-visual figcaption { margin-top: 13px; color: #9fb3c3; font-size: .75rem; }
.hero-links { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 70px; border-top: 1px solid #ffffff24; }
.hero-links a { padding: 22px 18px; border-right: 1px solid #ffffff24; font-size: .83rem; font-weight: 700; }
.hero-links a:first-child { border-left: 1px solid #ffffff24; }
.hero-links span { color: var(--sky); margin-right: 10px; font-size: .7rem; }
.hero-links a:hover { background: #ffffff0b; }

.section { padding: clamp(76px, 9vw, 124px) 0; }
.section-tint { background: var(--soft); }
.section-heading { max-width: 760px; margin-bottom: 42px; }
h2 { margin: 0 0 15px; font-size: clamp(1.8rem, 3.7vw, 3.1rem); line-height: 1.35; letter-spacing: -.035em; }
.section-heading > p:last-child { margin: 0; color: var(--muted); }

.intro { padding-bottom: 45px; }
.challenge-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 46px; list-style: none; padding: 0; margin: 34px 0 0; border-top: 1px solid var(--line); }
.challenge-list li { display: flex; align-items: center; gap: 14px; padding: 18px 6px; border-bottom: 1px solid var(--line); font-size: .95rem; }
.challenge-list span { color: var(--blue); font-size: .75rem; font-weight: 800; }

.capabilities { padding-top: 65px; }
.capability-grid { display: grid; grid-template-columns: repeat(3,1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.capability-card { padding: 34px 32px 34px 0; }
.capability-card + .capability-card { padding-left: 32px; border-left: 1px solid var(--line); }
.card-number { color: var(--sky); font-size: 1.8rem; font-weight: 300; }
.capability-card h3 { margin: 10px 0; font-size: 1.05rem; }
.capability-card p { min-height: 76px; margin: 0 0 20px; color: var(--muted); font-size: .9rem; }
.capability-card a { color: var(--blue); font-size: .78rem; font-weight: 800; }
.spec-table-wrap { margin-top: 54px; }
.spec-table-wrap h3 { font-size: 1rem; }
.spec-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.spec-table th, .spec-table td { padding: 15px 18px; border-bottom: 1px solid var(--line); text-align: left; }
.spec-table th { width: 22%; background: #edf1f4; font-weight: 800; }

.works-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.work-card { background: #fff; box-shadow: 0 12px 35px rgba(24,55,78,.08); }
.work-image { height: 228px; overflow: hidden; background: #dce2e7; }
.work-image img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.work-card:hover .work-image img { transform: scale(1.04); }
.crop-a img { object-position: 70% 58%; }
.crop-b img { object-position: 48% 35%; filter: saturate(.55) brightness(1.15); }
.crop-c img { object-position: 82% 70%; filter: contrast(.86) brightness(1.1); }
.work-body { padding: 24px; }
.work-body > span { color: var(--blue); font-size: .7rem; font-weight: 800; letter-spacing: .08em; }
.work-body h3 { margin: 7px 0 15px; font-size: 1.08rem; }
.work-body dl { display: grid; grid-template-columns: 72px 1fr; margin: 0; font-size: .78rem; }
.work-body dt, .work-body dd { margin: 0; padding: 6px 0; border-top: 1px solid var(--line); }
.work-body dt { color: var(--muted); }
.center { text-align: center; margin-top: 40px; }

.value-list { list-style: none; padding: 0; margin: 0; }
.value-list li { display: grid; grid-template-columns: 85px 1fr; gap: 18px; padding: 25px 0; border-top: 1px solid var(--line); }
.value-list li:last-child { border-bottom: 1px solid var(--line); }
.value-list > li > span { color: var(--sky); font-size: 2rem; font-weight: 300; }
.value-list h3 { margin: 0 0 6px; font-size: 1.05rem; }
.value-list p { margin: 0; max-width: 800px; color: var(--muted); font-size: .9rem; }

.facility-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 62px; align-items: end; }
.facility-image { width: 100%; aspect-ratio: 1.45; object-fit: cover; margin-top: 28px; }
.facility-copy h3 { margin: 0 0 14px; font-size: 1.05rem; }
.facility-copy h3:not(:first-child) { margin-top: 38px; }
.facility-copy p { color: var(--muted); font-size: .9rem; }
.equipment-list { margin: 0; border-top: 1px solid var(--line); }
.equipment-list div { display: flex; justify-content: space-between; gap: 24px; padding: 13px 0; border-bottom: 1px solid var(--line); font-size: .85rem; }
.equipment-list dd { margin: 0; color: var(--muted); }

.process-grid { display: grid; grid-template-columns: repeat(5,1fr); list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.process-grid li { position: relative; padding: 28px 24px 0 0; }
.process-grid li + li { padding-left: 24px; border-left: 1px solid var(--line); }
.process-grid span { color: var(--sky); font-size: 1.45rem; }
.process-grid h3 { margin: 8px 0; font-size: .95rem; }
.process-grid p { margin: 0; color: var(--muted); font-size: .78rem; }

.company { padding-top: 65px; }
.company-table { margin-top: 32px; }
.faq-list { background: #fff; border: 1px solid var(--line); }
.faq-list details + details { border-top: 1px solid var(--line); }
.faq-list summary { position: relative; cursor: pointer; list-style: none; padding: 22px 58px 22px 52px; font-weight: 800; }
.faq-list summary::before { content: "Q"; position: absolute; left: 22px; color: var(--blue); }
.faq-list summary::after { content: "+"; position: absolute; right: 24px; color: var(--blue); font-size: 1.25rem; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: 0; padding: 0 52px 22px; color: var(--muted); font-size: .9rem; }

.contact-grid { display: grid; grid-template-columns: 340px 1fr; gap: 72px; align-items: start; }
.contact-aside { position: sticky; top: 110px; }
.contact-aside h2 { font-size: clamp(1.75rem, 3vw, 2.55rem); }
.contact-aside > p:not(.eyebrow), .contact-aside li { color: var(--muted); font-size: .88rem; }
.contact-aside ul { padding-left: 20px; }
.contact-form { padding: 30px; background: var(--soft); border: 1px solid #e2e8ed; }
.form-notice { margin: -8px 0 22px; padding: 10px 12px; color: #5a6470; background: #fff; border-left: 3px solid var(--sky); font-size: .77rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.contact-form label { display: block; margin-bottom: 18px; font-size: .82rem; font-weight: 800; }
.contact-form em { color: #b14132; font-size: .7rem; font-style: normal; }
.contact-form input:not([type="checkbox"]), .contact-form textarea { display: block; width: 100%; margin-top: 7px; padding: 12px 13px; color: var(--ink); background: #fff; border: 1px solid #cfd8df; border-radius: 0; outline: 0; }
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px #1169a31c; }
.contact-form textarea { resize: vertical; min-height: 150px; }
.check { display: flex !important; align-items: center; gap: 9px; font-weight: 500 !important; }
.check input { width: 18px; height: 18px; accent-color: var(--blue); }
.contact-form .button { width: 100%; }
.form-status { min-height: 1.5em; margin: 12px 0 0; color: var(--blue); font-size: .82rem; font-weight: 700; }

.site-footer { padding: 58px 0 20px; color: #d7e2ea; background: var(--navy); }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 80px; padding-bottom: 48px; }
.footer-brand { color: #fff; }
.footer-grid p { color: #9fb3c3; font-size: .78rem; }
.footer-grid nav { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 44px; font-size: .78rem; }
.footer-grid nav a:hover { color: var(--sky); }
.copyright { display: flex; justify-content: space-between; align-items: center; padding-top: 18px; color: #8fa4b5; border-top: 1px solid #ffffff1f; font-size: .72rem; }

@media (max-width: 820px) {
  .container { width: min(calc(100% - 36px), var(--max)); }
  .desktop-nav { display: none; }
  .menu-button { display: grid; gap: 5px; width: 44px; height: 44px; place-content: center; padding: 0; border: 0; color: var(--navy); background: transparent; }
  .menu-button span { width: 22px; height: 2px; background: currentColor; transition: transform .2s, opacity .2s; }
  .menu-button[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .menu-button[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .mobile-nav { display: grid; padding: 6px 18px 18px; background: #fff; border-top: 1px solid var(--line); }
  .mobile-nav[hidden] { display: none; }
  .mobile-nav a { padding: 13px 8px; border-bottom: 1px solid var(--line); font-weight: 700; }
  .hero { padding-top: 54px; }
  .hero-grid, .facility-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero-copy { max-width: 620px; }
  .hero-visual { margin-top: 12px; }
  .hero-visual img { height: min(55vw, 420px); box-shadow: 14px 14px 0 #0b2236; }
  .hero-links { margin-top: 48px; }
  .capability-grid, .works-grid { grid-template-columns: 1fr; }
  .capability-card, .capability-card + .capability-card { padding: 28px 0; border-left: 0; border-bottom: 1px solid var(--line); }
  .capability-card:last-child { border-bottom: 0; }
  .capability-card p { min-height: auto; }
  .works-grid { max-width: 560px; margin-inline: auto; }
  .work-image { height: 270px; }
  .facility-grid { gap: 34px; }
  .process-grid { grid-template-columns: 1fr 1fr; border: 0; }
  .process-grid li, .process-grid li + li { padding: 22px 20px 22px 0; border-top: 1px solid var(--line); border-left: 0; }
  .process-grid li:nth-child(even) { padding-left: 20px; border-left: 1px solid var(--line); }
  .contact-grid { gap: 30px; }
  .contact-aside { position: static; }
}

@media (max-width: 560px) {
  .container { width: min(calc(100% - 30px), var(--max)); }
  .header-inner { min-height: 62px; }
  .brand { font-size: .9rem; }
  .brand-mark { width: 21px; height: 21px; }
  .hero { padding-top: 42px; }
  h1 { font-size: clamp(2.25rem, 12vw, 3.2rem); }
  .hero-lead { font-size: .92rem; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 14px; }
  .hero-actions .text-link { align-self: flex-start; }
  .hero-visual img { height: 260px; }
  .hero-links { grid-template-columns: 1fr; }
  .hero-links a, .hero-links a:first-child { padding: 15px 6px; border: 0; border-top: 1px solid #ffffff24; }
  .challenge-list { grid-template-columns: 1fr; gap: 0; }
  .section { padding: 70px 0; }
  .intro { padding-bottom: 30px; }
  .capabilities, .company { padding-top: 48px; }
  .section-heading { margin-bottom: 30px; }
  .spec-table th, .spec-table td { padding: 12px 10px; font-size: .78rem; }
  .spec-table th { width: 30%; }
  .work-image { height: 220px; }
  .value-list li { grid-template-columns: 52px 1fr; gap: 10px; }
  .value-list > li > span { font-size: 1.45rem; }
  .process-grid { grid-template-columns: 1fr; }
  .process-grid li:nth-child(even), .process-grid li + li { padding-left: 0; border-left: 0; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .contact-form { padding: 22px 18px; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .footer-grid nav { grid-template-columns: 1fr 1fr; gap: 10px 20px; }
  .copyright { gap: 20px; align-items: flex-start; }
}

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