:root {
  --blue: #004b98;
  --blue-2: #0b67bd;
  --navy: #0c2038;
  --navy-2: #132d4c;
  --ink: #142033;
  --muted: #5e6c7c;
  --line: #d9e1ea;
  --pale: #f3f6f9;
  --white: #fff;
  --max: 1180px;
  --shadow: 0 18px 50px rgba(12, 32, 56, .10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.container { width: min(calc(100% - 48px), var(--max)); margin-inline: auto; }
.skip-link { position: fixed; top: -100px; left: 20px; z-index: 1000; padding: 10px 16px; background: white; color: var(--blue); }
.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.97);
  border-bottom: 1px solid rgba(217,225,234,.86);
  transition: box-shadow .2s ease;
}
.site-header.is-scrolled { box-shadow: 0 6px 25px rgba(12,32,56,.08); }
.nav-wrap { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: flex; align-items: center; gap: 12px; min-width: 222px; }
.brand img { width: 55px; height: 41px; object-fit: contain; }
.brand-text { display: grid; gap: 1px; line-height: 1.08; }
.brand-text strong { font-size: 16px; letter-spacing: .05em; }
.brand-text span { color: var(--muted); font-size: 9px; letter-spacing: .12em; }
.site-nav { display: flex; align-items: center; gap: 26px; }
.site-nav a { position: relative; color: #344254; font-size: 15px; white-space: nowrap; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -11px; height: 2px; background: var(--blue); transition: right .2s ease; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--blue); }
.site-nav a:hover::after, .site-nav a[aria-current="page"]::after { right: 0; }
.nav-toggle { display: none; width: 44px; height: 44px; border: 0; background: transparent; color: var(--navy); cursor: pointer; }
.nav-toggle span, .nav-toggle::before, .nav-toggle::after { content: ""; display: block; width: 24px; height: 2px; margin: 5px auto; background: currentColor; transition: .2s ease; }
.nav-toggle[aria-expanded="true"] span { opacity: 0; }
.nav-toggle[aria-expanded="true"]::before { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"]::after { transform: translateY(-7px) rotate(-45deg); }

.hero {
  position: relative;
  min-height: 680px;
  overflow: hidden;
  color: white;
  background: var(--navy);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0 0 0 48%;
  background: linear-gradient(90deg, var(--navy) 0, rgba(12,32,56,.58) 30%, rgba(12,32,56,.18) 100%), url("../images/office-skyline.jpg") center/cover no-repeat;
}
.hero::after { content: ""; position: absolute; inset: 0; opacity: .22; background-image: linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px); background-size: 80px 80px; mask-image: linear-gradient(90deg,#000,transparent 75%); }
.hero-inner { position: relative; z-index: 2; min-height: 680px; display: flex; align-items: center; }
.hero-copy { width: min(680px, 62%); padding: 96px 0 84px; }
.eyebrow { display: inline-flex; align-items: center; gap: 12px; margin-bottom: 24px; color: #8ec6f5; font-size: 13px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 36px; height: 2px; background: currentColor; }
.hero h1 { margin: 0 0 24px; max-width: 650px; font-size: clamp(42px, 5.2vw, 72px); line-height: 1.13; letter-spacing: -.035em; }
.hero-en { margin: 0 0 32px; color: #c7d7e8; font-size: 15px; line-height: 1.55; letter-spacing: .09em; text-transform: uppercase; }
.hero-lead { max-width: 590px; margin: 0 0 36px; color: #e4edf6; font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.btn { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: 10px; padding: 11px 22px; border: 1px solid var(--blue); background: var(--blue); color: white; font-weight: 700; transition: transform .2s ease, background .2s ease, border-color .2s ease; }
.btn:hover { transform: translateY(-2px); background: #075dab; border-color: #075dab; }
.btn-light { background: transparent; border-color: rgba(255,255,255,.55); }
.btn-light:hover { background: white; color: var(--navy); border-color: white; }
.hero-brandline { position: absolute; z-index: 3; right: max(24px, calc((100vw - var(--max))/2)); bottom: 30px; color: rgba(255,255,255,.68); font-size: 12px; font-style: italic; letter-spacing: .08em; }

section { padding: 96px 0; }
.section-pale { background: var(--pale); }
.section-navy { color: white; background: var(--navy); }
.section-head { display: grid; grid-template-columns: .8fr 1.3fr; gap: 72px; align-items: end; margin-bottom: 50px; }
.section-head h2, .page-intro h1 { margin: 0; color: var(--navy); font-size: clamp(34px, 4vw, 52px); line-height: 1.18; letter-spacing: -.025em; }
.section-navy .section-head h2 { color: white; }
.section-head p { margin: 0; color: var(--muted); font-size: 17px; }
.section-navy .section-head p { color: #cbd9e8; }
.kicker { display: block; margin-bottom: 13px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.section-navy .kicker { color: #7ebcf0; }
.display-copy { max-width: 930px; margin: 0; font-size: clamp(25px, 3vw, 40px); line-height: 1.45; font-weight: 600; letter-spacing: -.015em; }
.display-copy em { color: var(--blue); font-style: normal; }

.fact-strip { padding: 0; border-bottom: 1px solid var(--line); background: white; }
.facts { display: grid; grid-template-columns: repeat(4,1fr); }
.fact { min-height: 150px; padding: 34px 28px; border-right: 1px solid var(--line); }
.fact:first-child { border-left: 1px solid var(--line); }
.fact strong { display: block; color: var(--blue); font-size: 35px; line-height: 1.2; font-weight: 750; }
.fact span { display: block; margin-top: 10px; color: var(--muted); font-size: 14px; }

.service-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.service-card { position: relative; min-height: 280px; padding: 34px; overflow: hidden; border: 1px solid var(--line); background: white; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.service-card:hover { transform: translateY(-4px); border-color: #a9c5df; box-shadow: var(--shadow); }
.card-no { display: inline-grid; width: 38px; height: 38px; place-items: center; margin-bottom: 42px; border-radius: 50%; color: var(--blue); background: #e8f2fb; font-size: 12px; font-weight: 800; }
.service-card h3 { margin: 0 0 12px; color: var(--navy); font-size: 23px; }
.service-card p { margin: 0; color: var(--muted); }
.text-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 24px; color: var(--blue); font-weight: 700; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }

.split-feature { display: grid; grid-template-columns: 1fr 1fr; min-height: 570px; }
.feature-photo { min-height: 520px; background: center/cover no-repeat; }
.feature-photo.domestic { background-image: url("../images/office-domestic.jpg"); }
.feature-photo.overseas { background-image: url("../images/office-window.jpg"); }
.feature-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(44px,7vw,100px); background: var(--navy); color: white; }
.feature-copy.blue { background: var(--blue); }
.feature-copy h2 { margin: 0 0 22px; font-size: clamp(34px,4vw,55px); line-height: 1.15; }
.feature-copy p { margin: 0 0 26px; color: #d6e2ed; font-size: 17px; }
.feature-copy ul { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 24px; margin: 0; padding: 0; list-style: none; }
.feature-copy li { position: relative; padding-left: 16px; color: #eef5fb; font-size: 14px; }
.feature-copy li::before { content: ""; position: absolute; left: 0; top: .72em; width: 5px; height: 5px; background: #77bdf3; }

.method-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; border-top: 1px solid #36506e; border-bottom: 1px solid #36506e; }
.method { padding: 42px 30px; border-right: 1px solid #36506e; }
.method:last-child { border-right: 0; }
.method b { color: #77bdf3; font-size: 13px; letter-spacing: .14em; }
.method h3 { margin: 18px 0 9px; font-size: 21px; }
.method p { margin: 0; color: #b9cadd; font-size: 14px; }

.case-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.case-card { padding: 38px; border-top: 4px solid var(--blue); background: white; box-shadow: var(--shadow); }
.case-card .case-type { color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .14em; }
.case-card h3 { margin: 12px 0 16px; font-size: 28px; color: var(--navy); }
.case-card p { margin: 0; color: var(--muted); }
.case-points { display: grid; gap: 10px; margin: 22px 0 0; padding: 20px 0 0; border-top: 1px solid var(--line); list-style: none; }
.case-points li { padding-left: 18px; position: relative; }
.case-points li::before { content: ""; position: absolute; left: 0; top: .72em; width: 6px; height: 6px; background: var(--blue); }

.cta { padding: 72px 0; background: var(--blue); color: white; }
.cta-inner { display: flex; justify-content: space-between; align-items: center; gap: 36px; }
.cta h2 { margin: 0 0 8px; font-size: clamp(30px,4vw,46px); line-height: 1.2; }
.cta p { margin: 0; color: #d9ebfa; }
.cta .btn { color: var(--navy); background: white; border-color: white; flex: 0 0 auto; }

.page-hero { position: relative; padding: 118px 0 92px; overflow: hidden; color: white; background: var(--navy); }
.page-hero::after { content: ""; position: absolute; width: 480px; height: 480px; right: -130px; top: -230px; border: 1px solid rgba(255,255,255,.13); transform: rotate(45deg); box-shadow: 0 0 0 90px rgba(255,255,255,.025), 0 0 0 180px rgba(255,255,255,.02); }
.page-hero .container { position: relative; z-index: 2; }
.page-hero .kicker { color: #8ec6f5; }
.page-hero h1 { max-width: 820px; margin: 0 0 20px; font-size: clamp(42px,5vw,65px); line-height: 1.15; }
.page-hero p { max-width: 720px; margin: 0; color: #c8d8e8; font-size: 18px; }
.breadcrumbs { margin-top: 35px; color: #91a5ba; font-size: 13px; }
.breadcrumbs a { color: white; }

.two-col { display: grid; grid-template-columns: .8fr 1.25fr; gap: 90px; align-items: start; }
.two-col h2 { margin: 0; color: var(--navy); font-size: clamp(34px,4vw,50px); line-height: 1.2; }
.prose { color: var(--muted); font-size: 17px; }
.prose p:first-child { margin-top: 0; }
.prose strong { color: var(--ink); }
.quote-block { margin: 30px 0 0; padding: 28px 30px; border-left: 4px solid var(--blue); background: var(--pale); color: var(--navy); font-size: 20px; font-weight: 650; }

.vision-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.vision-card { padding: 34px; color: white; background: var(--navy); }
.vision-card:nth-child(2) { background: var(--blue); }
.vision-card .kicker { color: #89c5f5; }
.vision-card h3 { margin: 22px 0 10px; font-size: 25px; }
.vision-card p { margin: 0; color: #d5e2ee; }

.timeline { display: grid; grid-template-columns: repeat(4,1fr); border-top: 2px solid var(--blue); }
.timeline-item { position: relative; padding: 32px 30px 36px 0; }
.timeline-item::before { content: ""; position: absolute; top: -7px; left: 0; width: 12px; height: 12px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 6px white; }
.timeline-item strong { color: var(--blue); font-size: 28px; }
.timeline-item p { margin: 8px 0 0; color: var(--muted); }

.credential-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.credential { padding: 36px; border: 1px solid #2b4562; background: #122a47; }
.credential strong { display: block; color: #8cc9fb; font-size: 46px; line-height: 1; }
.credential span { display: block; margin-top: 14px; color: white; font-size: 17px; }
.credential small { display: block; margin-top: 8px; color: #aebfd0; }
.team-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.team-card { padding: 30px; border: 1px solid var(--line); background: white; }
.team-card h3 { margin: 0 0 4px; color: var(--navy); font-size: 21px; }
.team-card .role { margin: 0 0 16px; color: var(--blue); font-size: 13px; font-weight: 700; }
.team-card p { margin: 0; color: var(--muted); font-size: 14px; }

.detail-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.detail-card { padding: 38px; border: 1px solid var(--line); background: white; }
.detail-card h2, .detail-card h3 { margin: 0 0 18px; color: var(--navy); }
.detail-card h2 { font-size: 30px; }
.detail-card ul { margin: 0; padding: 0; list-style: none; columns: 2; column-gap: 30px; }
.detail-card li { position: relative; break-inside: avoid; margin-bottom: 10px; padding-left: 16px; color: var(--muted); }
.detail-card li::before { content: ""; position: absolute; left: 0; top: .72em; width: 5px; height: 5px; background: var(--blue); }
.detail-card.wide { grid-column: 1 / -1; }

.steps { display: grid; gap: 1px; background: var(--line); }
.step { display: grid; grid-template-columns: 70px .6fr 1.4fr; gap: 26px; align-items: start; padding: 32px; background: white; }
.step-no { color: var(--blue); font-size: 28px; font-weight: 800; }
.step h3 { margin: 3px 0 0; color: var(--navy); font-size: 21px; }
.step p { margin: 0; color: var(--muted); }

.contact-layout { display: grid; grid-template-columns: 1fr .9fr; gap: 56px; align-items: stretch; }
.contact-card { padding: 44px; background: var(--navy); color: white; }
.contact-card h2 { margin: 0 0 36px; font-size: 33px; }
.contact-item { padding: 22px 0; border-top: 1px solid #314a66; }
.contact-item small { display: block; margin-bottom: 8px; color: #8ebfe8; font-size: 11px; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.contact-item p, .contact-item address { margin: 0; color: #e4ecf4; font-style: normal; }
.contact-item a { color: white; text-decoration: underline; text-underline-offset: 4px; }
.contact-photo { min-height: 520px; object-fit: cover; width: 100%; height: 100%; }
.notice { padding: 22px 24px; border: 1px solid #cddbea; background: #f4f8fc; color: #42556b; }

.legal { max-width: 850px; }
.legal h2 { margin: 42px 0 10px; color: var(--navy); font-size: 25px; }
.legal p, .legal li { color: var(--muted); }
.legal a { color: var(--blue); text-decoration: underline; }

.error-page { min-height: calc(100vh - 78px); display: grid; place-items: center; padding: 70px 24px; color: white; text-align: center; background: var(--navy); }
.error-code { margin: 0; color: #68b3ef; font-size: clamp(100px,20vw,220px); line-height: .86; letter-spacing: -.08em; }
.error-page h1 { margin: 28px 0 10px; font-size: 35px; }
.error-page p { margin: 0 0 28px; color: #bbcbdb; }

.site-footer { color: #b6c4d3; background: #09192c; }
.footer-main { display: grid; grid-template-columns: 1.2fr .8fr .9fr; gap: 60px; padding: 64px 0 50px; }
.footer-brand h2 { margin: 0 0 8px; color: white; font-size: 24px; }
.footer-brand p { max-width: 360px; margin: 0; color: #9fb0c2; }
.footer-col h3 { margin: 0 0 17px; color: white; font-size: 15px; }
.footer-col a { display: block; width: fit-content; margin: 8px 0; color: #b6c4d3; }
.footer-col a:hover { color: white; }
.footer-col address { margin: 0; color: #b6c4d3; font-style: normal; }
.footer-bottom { border-top: 1px solid #24374d; }
.footer-bottom-inner { min-height: 70px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 26px; font-size: 14px; }
.footer-legal { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-legal a { color: #d7e2ed; text-decoration: underline; text-underline-offset: 3px; }
.footer-legal .icp { color: white; font-weight: 650; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .55s ease, transform .55s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 980px) {
  .nav-toggle { display: block; }
  .site-nav { position: absolute; inset: 78px 0 auto; display: none; padding: 18px 24px 26px; border-top: 1px solid var(--line); background: white; box-shadow: 0 18px 30px rgba(12,32,56,.12); }
  .site-nav.is-open { display: grid; }
  .site-nav a { padding: 10px 0; }
  .site-nav a::after { bottom: 2px; }
  .hero::before { inset: 0; opacity: .44; }
  .hero-copy { width: 82%; }
  .facts { grid-template-columns: repeat(2,1fr); }
  .fact:nth-child(3) { border-left: 1px solid var(--line); }
  .service-grid, .team-grid { grid-template-columns: repeat(2,1fr); }
  .section-head, .two-col { grid-template-columns: 1fr; gap: 28px; }
  .split-feature { grid-template-columns: 1fr; }
  .feature-photo { min-height: 420px; }
  .feature-copy { min-height: 490px; }
  .timeline { grid-template-columns: repeat(2,1fr); }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 700px) {
  .container { width: min(calc(100% - 34px), var(--max)); }
  .nav-wrap { min-height: 70px; }
  .site-nav { inset-block-start: 70px; }
  .brand { min-width: 0; }
  .brand img { width: 47px; height: 35px; }
  .brand-text strong { font-size: 14px; }
  .brand-text span { font-size: 8px; }
  .hero, .hero-inner { min-height: 650px; }
  .hero-copy { width: 100%; padding: 82px 0 110px; }
  .hero h1 { font-size: clamp(38px,11vw,54px); }
  .hero-en { font-size: 12px; }
  .hero-lead { font-size: 16px; }
  .hero-brandline { left: 17px; right: 17px; bottom: 24px; }
  section { padding: 72px 0; }
  .section-head { margin-bottom: 34px; }
  .facts, .service-grid, .case-grid, .vision-grid, .credential-grid, .team-grid, .detail-grid { grid-template-columns: 1fr; }
  .fact { min-height: auto; border-left: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .service-card { min-height: 0; }
  .card-no { margin-bottom: 30px; }
  .feature-photo { min-height: 310px; }
  .feature-copy { min-height: 0; padding: 54px 24px; }
  .feature-copy ul { grid-template-columns: 1fr; }
  .method-grid { grid-template-columns: 1fr; }
  .method { border-right: 0; border-bottom: 1px solid #36506e; }
  .method:last-child { border-bottom: 0; }
  .cta-inner { align-items: flex-start; flex-direction: column; }
  .page-hero { padding: 90px 0 70px; }
  .timeline { grid-template-columns: 1fr; }
  .detail-card.wide { grid-column: auto; }
  .detail-card ul { columns: 1; }
  .step { grid-template-columns: 54px 1fr; gap: 12px; }
  .step p { grid-column: 2; }
  .contact-layout { grid-template-columns: 1fr; gap: 24px; }
  .contact-card { padding: 30px 24px; }
  .contact-photo { min-height: 330px; }
  .footer-main { grid-template-columns: 1fr; gap: 34px; }
  .footer-brand { grid-column: auto; }
  .footer-bottom-inner { align-items: flex-start; flex-direction: column; padding: 22px 0 26px; }
  .footer-legal { flex-direction: column; gap: 8px; }
  .footer-legal .icp { font-size: 15px; }
}