/* ===== Design tokens and base ===== */
:root {
  --navy: #142E6E;
  --navy-deep: #0A1D4A;
  --gold: #C89A2B;
  --gold-light: #E0C783;
  --white: #FFFFFF;
  --light: #F7F8FA;
  --text: #222222;
  --sub: #666666;
  --border: #E4E7EC;
  --serif: "Cormorant Garamond", serif;
  --sans: "Noto Sans JP", sans-serif;
  --shadow: 0 12px 36px rgba(20, 46, 110, 0.06);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin: 0; color: var(--text); background: var(--white); font-family: var(--sans); font-size: 16px; line-height: 1.9; -webkit-font-smoothing: antialiased; }
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.container { width: min(1200px, calc(100% - 80px)); margin-inline: auto; }
.section { padding: 120px 0; }
.skip-link { position: fixed; z-index: 9999; top: 8px; left: 8px; padding: 8px 14px; color: #fff; background: var(--navy); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 4px; }

/* ===== Shared typography ===== */
.section-label, .eyebrow { margin: 0 0 22px; color: var(--gold); font-family: var(--serif); font-size: 14px; font-weight: 600; letter-spacing: .22em; line-height: 1.3; }
.section-heading { max-width: 760px; margin-bottom: 64px; }
.section-heading.centered { margin-inline: auto; text-align: center; }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { font-weight: 500; letter-spacing: .03em; line-height: 1.5; }
h2 { margin-bottom: 24px; color: var(--navy-deep); font-size: clamp(32px, 4vw, 50px); }
.heading-line { display: block; white-space: nowrap; }
.keep-together { white-space: nowrap; }
.section-heading > p:last-child { margin: 0; color: var(--sub); }
.lead { color: var(--navy); font-size: 20px; font-weight: 500; line-height: 1.9; }
.advisory-line { display: block; }
.mobile-break { display: none; }

/* ===== Header ===== */
.site-header { position: fixed; z-index: 1000; top: 0; width: 100%; height: 84px; background: rgba(255,255,255,.36); transition: background .3s, box-shadow .3s, backdrop-filter .3s; }
.site-header.is-scrolled, .site-header.menu-active { background: rgba(255,255,255,.96); box-shadow: 0 5px 22px rgba(0,0,0,.06); backdrop-filter: blur(14px); }
.header-inner { display: flex; align-items: center; justify-content: space-between; width: min(1360px, calc(100% - 80px)); height: 100%; margin-inline: auto; }
.brand { display: block; flex: 0 0 auto; width: 330px; height: 76px; overflow: hidden; }
.brand img { width: 100%; height: 100%; object-fit: contain; }
.global-nav { display: flex; align-items: center; gap: 32px; }
.global-nav a { position: relative; color: #24314c; font-family: var(--serif); font-size: 18px; font-weight: 600; letter-spacing: .1em; }
.global-nav a:not(.nav-contact)::after { position: absolute; bottom: -6px; left: 0; width: 0; height: 1px; background: var(--gold); content: ""; transition: width .3s; }
.global-nav a:hover::after { width: 100%; }
.global-nav .nav-contact { padding: 11px 22px; color: #fff; background: var(--navy); transition: background .25s; }
.global-nav .nav-contact:hover { background: var(--navy-deep); }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 9px; border: 0; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; width: 26px; height: 1px; margin: 6px 0; background: var(--navy); transition: transform .3s, opacity .3s; }
.privacy-back { color: var(--navy); font-size: 14px; font-weight: 600; }

/* ===== Hero ===== */
.hero { position: relative; display: flex; align-items: center; min-height: 100svh; overflow: hidden; padding: 150px 0 110px; background: linear-gradient(120deg, #fff 0%, #fff 55%, #f6f7fa 100%); }
.hero::before { position: absolute; top: 0; left: 0; width: 7px; height: 100%; background: var(--navy); content: ""; }
.hero-inner { position: relative; z-index: 2; margin-top: 50px; }
.hero h1 { max-width: 900px; margin-bottom: 24px; color: var(--navy-deep); font-size: clamp(43px, 6vw, 78px); line-height: 1.5; }
.hero-sub { margin-bottom: 26px; color: var(--gold); font-size: clamp(20px, 2.2vw, 28px); font-weight: 500; letter-spacing: .06em; }
.hero-description { margin-bottom: 38px; color: #50545c; font-size: 17px; }
.hero-actions { display: flex; gap: 16px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-width: 205px; height: 56px; padding: 13px 32px; border: 1px solid var(--navy); border-radius: 7px; font-size: 14px; font-weight: 600; letter-spacing: .06em; transition: color .25s, background .25s, border-color .25s; }
.button-primary { color: #fff; background: var(--navy); }
.button-primary:hover { background: var(--navy-deep); }
.button-outline { color: var(--navy); background: rgba(255,255,255,.75); }
.button-outline:hover { color: #fff; background: var(--navy); }
.hero-mark { position: absolute; z-index: 0; top: 50%; right: -16%; width: 76%; max-width: 1220px; opacity: .05; transform: translateY(-50%); filter: saturate(.8); }
.scroll-cue { position: absolute; z-index: 2; bottom: 22px; left: 50%; display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--navy); font-family: var(--serif); font-size: 11px; letter-spacing: .2em; transform: translateX(-50%); }
.scroll-line { width: 1px; height: 34px; background: linear-gradient(var(--gold) 50%, transparent 50%); background-size: 100% 200%; animation: scrollline 1.8s ease-in-out infinite; }
@keyframes scrollline { 0% { background-position: 0 100%; } 100% { background-position: 0 -100%; } }

/* ===== Challenge ===== */
.challenge { background: var(--light); }
.challenge .section-heading { max-width: 880px; }
.challenge-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.challenge-card { min-height: 280px; padding: 38px; border: 1px solid var(--border); background: #fff; box-shadow: var(--shadow); transition: transform .3s, box-shadow .3s; }
.challenge-card:hover { box-shadow: 0 15px 40px rgba(20,46,110,.08); transform: translateY(-3px); }
.card-number, .method-item > span { color: var(--gold); font-family: var(--serif); font-size: 20px; }
.challenge-card h3 { margin: 30px 0 15px; color: var(--navy); font-size: 23px; font-weight: 500; }
.challenge-card p { margin: 0; color: var(--sub); font-size: 14px; }

/* ===== Why ===== */
.split-layout { display: grid; grid-template-columns: 1.08fr .82fr; align-items: center; gap: 110px; }
.why-copy > p:not(.section-label):not(.lead) { color: var(--sub); }
.process-vertical { position: relative; margin: 0; padding: 0; list-style: none; }
.process-vertical::before { position: absolute; top: 28px; bottom: 28px; left: 25px; width: 1px; background: var(--gold); content: ""; }
.process-vertical li { position: relative; z-index: 1; display: flex; align-items: center; gap: 28px; min-height: 112px; }
.process-vertical li > span { display: grid; flex: 0 0 51px; width: 51px; height: 51px; place-items: center; border: 1px solid var(--gold); border-radius: 50%; color: var(--gold); background: #fff; font-family: var(--serif); }
.process-vertical strong { display: block; color: var(--navy); font-size: 22px; font-weight: 500; }
.process-vertical small { color: var(--sub); }

/* ===== Method ===== */
.method { background: var(--navy-deep); }
.method h2, .method .section-heading > p:last-child { color: #fff; }
.method .section-heading > p:last-child { opacity: .68; }
.method-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.method-item { min-height: 285px; padding: 36px; border-top: 1px solid rgba(255,255,255,.18); border-right: 1px solid rgba(255,255,255,.18); color: #fff; }
.method-item:nth-child(3n) { border-right: 0; }
.method-item:nth-child(n+4) { border-bottom: 1px solid rgba(255,255,255,.18); }
.method-item .en { margin: 30px 0 0; color: rgba(255,255,255,.48); font-family: var(--serif); font-size: 17px; letter-spacing: .1em; }
.method-item h3 { margin: 2px 0 16px; font-size: 23px; font-weight: 500; }
.method-item p:last-child { margin: 0; color: rgba(255,255,255,.68); font-size: 14px; }
.method-item.featured { color: var(--navy-deep); background: var(--gold); }
.method-item.featured > span, .method-item.featured .en, .method-item.featured p:last-child { color: var(--navy-deep); }

/* ===== Service map ===== */
.services { background: var(--light); }
.services .section-heading { max-width: 840px; }
.service-map { position: relative; display: grid; grid-template: repeat(3, auto) / repeat(3, 1fr); gap: 28px 60px; align-items: center; }
.service-map::before, .service-map::after { position: absolute; z-index: 0; background: var(--border); content: ""; }
.service-map::before { top: 50%; left: 16%; width: 68%; height: 1px; }
.service-map::after { top: 18%; left: 50%; width: 1px; height: 64%; }
.service-node { position: relative; z-index: 1; min-height: 176px; padding: 28px; border: 1px solid var(--border); background: #fff; text-align: center; }
.service-node > span, .service-node > small { color: var(--gold); font-family: var(--serif); font-size: 13px; letter-spacing: .12em; }
.service-node h3 { margin: 10px 0 8px; color: var(--navy); font-size: 19px; font-weight: 500; }
.service-node p { margin: 0; color: var(--sub); font-size: 13px; line-height: 1.7; }
.node-governance { grid-area: 1 / 1; }
.node-org { grid-area: 1 / 3; }
.node-center { grid-area: 2 / 2; display: flex; flex-direction: column; justify-content: center; min-height: 210px; border-color: var(--navy); color: #fff; background: var(--navy); box-shadow: 0 14px 35px rgba(20,46,110,.18); }
.node-center h3 { color: #fff; font-size: 27px; }
.node-center p { color: rgba(255,255,255,.78); font-size: 14px; }
.node-meeting { grid-area: 2 / 1; }
.node-management { grid-area: 2 / 3; }
.node-implementation { grid-area: 3 / 2; }

/* ===== Transformation ===== */
.transformation-grid { display: grid; grid-template-columns: 1fr 80px 1fr; max-width: 1000px; margin-inline: auto; }
.transformation .section-heading { max-width: 900px; }
.transformation-grid article { padding: 52px; }
.before { border: 1px solid var(--border); background: #fff; }
.after { color: #fff; background: var(--navy); }
.state-label { margin-bottom: 12px; color: var(--gold); font-family: var(--serif); font-size: 14px; letter-spacing: .2em; }
.transformation-grid h3 { margin-bottom: 30px; font-size: 23px; font-weight: 500; }
.before h3 { color: var(--navy); }
.transformation-grid ul { margin: 0; padding: 0; list-style: none; }
.transformation-grid li { position: relative; padding: 11px 0 11px 22px; border-bottom: 1px solid var(--border); font-size: 14px; }
.after li { border-color: rgba(255,255,255,.17); }
.transformation-grid li::before { position: absolute; top: 21px; left: 2px; width: 7px; height: 1px; background: var(--gold); content: ""; }
.transform-divider { position: relative; display: grid; place-items: center; }
.transform-divider::before { position: absolute; width: 1px; height: 100%; background: var(--gold); content: ""; }
.transform-divider span { position: relative; z-index: 1; padding: 8px; color: var(--gold); background: #fff; font-family: var(--serif); font-size: 12px; letter-spacing: .15em; }

/* ===== Engage ===== */
.engage { background: var(--light); }
.engage-steps { display: grid; grid-template-columns: repeat(5, 1fr); margin: 0; padding: 0; list-style: none; }
.engage-steps li { min-height: 220px; padding: 30px 24px; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); border-left: 1px solid var(--border); background: #fff; }
.engage-steps li:last-child { border-right: 1px solid var(--border); }
.engage-steps span { color: var(--gold); font-family: var(--serif); }
.engage-steps h3 { margin: 40px 0 12px; color: var(--navy); font-size: 17px; font-weight: 500; }
.engage-steps p { margin: 0; color: var(--sub); font-size: 13px; }
.engage-steps .active { color: #fff; border-color: var(--navy); background: var(--navy); transform: translateY(-10px); }
.engage-steps .active h3, .engage-steps .active p { color: #fff; }
.engage-steps .active p { opacity: .72; }
.engage-message { margin: 70px 0 0; color: var(--navy); font-size: clamp(22px, 3vw, 34px); line-height: 1.7; text-align: center; }
.engage-message strong { font-weight: 500; }

/* ===== Founder ===== */
.founder-grid { display: grid; grid-template-columns: .8fr 1.15fr; align-items: start; gap: 90px; }
.profile-visual { text-align: center; }
.profile-frame { display: grid; width: min(100%, 430px); aspect-ratio: 1; margin-inline: auto; place-items: center; background: linear-gradient(145deg, var(--light), #fff); box-shadow: inset 0 0 0 1px var(--border); }
.profile-frame img { width: 76%; max-width: 325px; filter: drop-shadow(0 16px 24px rgba(20,46,110,.1)); }
.profile-visual > p { margin: 20px 0 0; color: var(--gold); font-family: var(--serif); font-size: 13px; letter-spacing: .2em; }
.founder-name { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; margin: 28px 0; padding: 20px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.founder-name small { color: var(--sub); font-size: 13px; }
.founder-name strong { color: var(--navy); font-size: 31px; font-weight: 600; letter-spacing: .05em; }
.founder-bio p { margin: 0 0 18px; color: var(--sub); font-size: 15px; line-height: 1.95; }
.founder-bio p:last-child { margin-bottom: 0; }
.founder-closing { margin: 30px 0 0; padding: 4px 0 4px 18px; border-left: 1px solid var(--gold); color: var(--navy); font-size: 15px; font-weight: 500; line-height: 1.9; }
.profile-career { margin-top: 34px; }
.profile-career h3 { margin: 0 0 12px; color: var(--navy); font-size: 15px; font-weight: 600; letter-spacing: .08em; }
.profile-career ul { margin: 0; padding: 18px 0 0; border-top: 1px solid var(--border); list-style: none; }
.profile-career li { position: relative; margin: 0; padding: 8px 0 8px 18px; color: var(--sub); font-size: 13px; line-height: 1.75; }
.profile-career li::before { position: absolute; top: 19px; left: 1px; width: 7px; height: 1px; background: var(--gold); content: ""; }
.profile-career li span { color: #7a7a7a; font-size: 12px; }

/* ===== Company, Contact, Footer ===== */
.company { background: var(--light); }
.company-grid { display: grid; grid-template-columns: .62fr 1.38fr; gap: 70px; }
.company-list { margin: 0; border-top: 1px solid var(--border); }
.company-list > div { display: grid; grid-template-columns: 145px 1fr; gap: 30px; padding: 26px 0; border-bottom: 1px solid var(--border); }
.company-list dt { color: var(--navy); font-size: 14px; font-weight: 700; letter-spacing: .04em; }
.company-list dd { margin: 0; line-height: 1.95; }
.company-kana { display: block; margin-top: 3px; color: var(--sub); font-size: 13px; }
.company-list a { color: var(--navy); text-decoration: underline; text-underline-offset: 4px; }
.contact { padding: 130px 0; color: #fff; background: var(--navy); text-align: center; }
.contact h2 { margin-bottom: 30px; color: #fff; font-size: clamp(32px, 4.6vw, 56px); }
.contact-intro { margin: 0 0 14px; color: var(--gold-light); font-size: clamp(20px, 2.2vw, 27px); font-weight: 500; letter-spacing: .08em; }
.contact-inner .contact-copy { margin-bottom: 48px; color: rgba(255,255,255,.78); font-size: 16px; line-height: 2; }
.section-label.light { color: var(--gold-light); }
.button-gold { min-width: 244px; height: 64px; padding-inline: 42px; border-color: #D4A83C; color: var(--navy-deep); background: var(--gold); box-shadow: 0 10px 24px rgba(4,15,44,.2); font-weight: 700; }
.button-gold:hover { border-color: #DCB653; background: #D7AA3C; }
.contact-inner > small { display: block; margin-top: 20px; color: rgba(255,255,255,.55); }
.site-footer { padding: 70px 0 24px; color: rgba(255,255,255,.67); background: #071330; }
.footer-main { display: flex; align-items: flex-start; justify-content: space-between; padding-bottom: 50px; }
.footer-logo-wrap { width: 250px; height: 76px; overflow: hidden; background: #fff; }
.footer-logo-wrap img { width: 100%; height: 100%; object-fit: contain; }
.footer-brand p { margin: 0; }
.footer-brand .footer-company { margin-top: 21px; color: rgba(255,255,255,.9); font-size: 14px; font-weight: 500; }
.footer-brand .footer-kana { margin-top: 2px; color: rgba(255,255,255,.56); font-size: 12px; letter-spacing: .05em; }
.footer-brand .footer-tagline { margin-top: 11px; font-size: 13px; }
.footer-links { display: flex; flex-direction: column; align-items: flex-end; gap: 9px; font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.11); font-family: var(--serif); font-size: 12px; letter-spacing: .08em; }
.footer-bottom p { margin: 0; }
.compact-footer { padding-top: 22px; }

/* ===== Privacy ===== */
.privacy-page { padding: 160px 0 120px; }
.privacy-container { max-width: 900px; }
.privacy-page h1 { margin-bottom: 32px; color: var(--navy-deep); font-size: clamp(36px, 5vw, 58px); }
.privacy-intro { margin-bottom: 70px; color: var(--sub); }
.privacy-page section { padding: 30px 0; border-top: 1px solid var(--border); }
.privacy-page section h2 { margin-bottom: 12px; font-size: 21px; }
.privacy-page section p { margin: 0; color: var(--sub); }
.privacy-page a { color: var(--navy); text-decoration: underline; }
.privacy-date { margin-top: 50px; text-align: right; }

/* ===== Scroll reveal ===== */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .75s ease, transform .75s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 960px) {
  .container, .header-inner { width: min(100% - 48px, 1200px); }
  .global-nav { gap: 18px; }
  .global-nav a { font-size: 16px; }
  .brand { width: 250px; }
  .split-layout, .founder-grid { gap: 60px; }
  .service-map { gap: 24px; }
  .engage-steps { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .engage-steps li, .engage-steps li:last-child { border: 1px solid var(--border); }
  .engage-steps .active { transform: none; }
  .company-grid { gap: 55px; }
}

@media (max-width: 767px) {
  .container, .header-inner { width: calc(100% - 48px); }
  .section { padding: 72px 0; }
  .desktop-only { display: none; }
  .mobile-break { display: initial; }
  .section-heading { margin-bottom: 42px; }
  h2 { font-size: 32px; }
  .lead { font-size: 18px; }
  .advisory-line { display: inline; }

  .site-header { height: 70px; }
  .brand { width: 210px; height: 58px; }
  .menu-toggle { display: block; }
  .menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .global-nav { position: fixed; top: 70px; right: 0; bottom: 0; left: 0; display: flex; flex-direction: column; align-items: stretch; gap: 0; padding: 28px 24px; visibility: hidden; background: rgba(255,255,255,.98); opacity: 0; transform: translateY(-10px); transition: opacity .25s, transform .25s, visibility .25s; }
  .global-nav.is-open { visibility: visible; opacity: 1; transform: none; }
  .global-nav a { padding: 16px 4px; border-bottom: 1px solid var(--border); font-size: 20px; }
  .global-nav .nav-contact { margin-top: 22px; padding: 14px; text-align: center; }

  .hero { min-height: 100svh; padding: 126px 0 88px; }
  .hero::before { width: 4px; }
  .hero-inner { margin-top: 28px; }
  .hero h1 { font-size: clamp(37px, 11vw, 52px); line-height: 1.48; }
  .hero-sub { font-size: 19px; }
  .hero-description { font-size: 15px; line-height: 1.85; }
  .hero-actions { flex-direction: column; max-width: 280px; }
  .hero-mark { top: 28%; right: -50%; width: 138%; }
  .scroll-cue { display: none; }

  .challenge-grid, .split-layout, .method-grid, .founder-grid, .company-grid { grid-template-columns: 1fr; }
  .challenge-grid { gap: 16px; }
  .challenge-card { min-height: 0; padding: 30px; }
  .split-layout { gap: 45px; }
  .process-vertical li { min-height: 96px; }
  .method-grid { gap: 0; }
  .method-item, .method-item:nth-child(3n), .method-item:nth-child(n+4) { min-height: 0; padding: 30px 4px; border-right: 0; border-bottom: 0; }
  .method-item.featured { margin-inline: -24px; padding-inline: 24px; }

  .service-map { display: grid; grid-template: none / 1fr; gap: 14px; }
  .service-map::before, .service-map::after { display: none; }
  .service-node, .node-governance, .node-org, .node-center, .node-meeting, .node-management, .node-implementation { grid-area: auto; min-height: 0; padding: 26px; }
  .node-center { grid-row: 1; min-height: 170px; }

  .transformation-grid { grid-template-columns: 1fr; }
  .transformation-grid article { padding: 34px 26px; }
  .transform-divider { height: 64px; }
  .transform-divider::before { width: 1px; height: 100%; }
  .transform-divider span { padding: 6px 10px; }

  .engage-steps { grid-template-columns: 1fr; gap: 10px; }
  .engage-steps li { min-height: 0; padding: 24px; }
  .engage-steps h3 { margin: 16px 0 6px; }
  .engage-message { margin-top: 48px; text-align: left; }

  .founder-grid { gap: 48px; }
  .profile-frame { max-width: 380px; }
  .founder-name { flex-wrap: wrap; }
  .company-grid { gap: 20px; }
  .heading-line { white-space: normal; text-wrap: balance; }
  .keep-together { display: inline-block; }
  .company-list > div { grid-template-columns: 1fr; gap: 7px; padding: 22px 0; }
  .company-list dd { line-height: 1.9; }
  .button-gold { width: min(100%, 320px); min-height: 64px; }

  .contact { padding: 82px 0; }
  .challenge h2 { letter-spacing: .015em; }
  .contact h2 { font-size: 30px; letter-spacing: .02em; }
  .footer-main { flex-direction: column; gap: 35px; }
  .footer-links { align-items: flex-start; }
  .footer-bottom { flex-direction: column; gap: 8px; }
  .privacy-page { padding: 120px 0 72px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}