@charset "utf-8";

:root {
  --ink: #17211d;
  --muted: #5a6862;
  --line: #dce5e0;
  --surface: #ffffff;
  --soft: #f3f7f5;
  --green-900: #0b3b2c;
  --green-800: #104b39;
  --green-700: #155f47;
  --green-600: #1c7458;
  --green-100: #dcece5;
  --accent: #d9a928;
  --max: 1120px;
  --radius: 10px;
  --shadow: 0 18px 48px rgba(11, 59, 44, .09);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: "Helvetica Neue", "Hiragino Kaku Gothic ProN", "Yu Gothic", YuGothic, Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-text-size-adjust: 100%;
}
body.nav-open { overflow: hidden; }
img, svg { max-width: 100%; height: auto; }
a { color: var(--green-700); text-underline-offset: .2em; }
a:hover { color: var(--green-900); }
button, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible { outline: 3px solid rgba(217, 169, 40, .65); outline-offset: 4px; }
h1, h2, h3, p, dl, dd, ol, ul { margin-top: 0; }
h1, h2, h3 { line-height: 1.35; letter-spacing: .02em; }
p:last-child { margin-bottom: 0; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 1000; top: 8px; left: 8px; padding: 10px 14px; background: #fff; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.placeholder { color: #7a5b08; background: #fff4cc; padding: 0 .25em; }

.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.header-inner { width: min(calc(100% - 48px), var(--max)); min-height: 76px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.site-identity { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); text-decoration: none; line-height: 1.2; }
.site-identity strong, .site-identity small { display: block; }
.site-identity strong { font-size: 1rem; }
.site-identity small { margin-top: 4px; color: var(--muted); font-size: .72rem; letter-spacing: .08em; }
.site-monogram { display: grid; place-items: center; width: 42px; height: 42px; background: var(--green-800); color: white; font-weight: 800; letter-spacing: .08em; border-radius: 6px; }
.nav-list { display: flex; align-items: center; gap: 28px; margin: 0; padding: 0; list-style: none; }
.nav-list a { position: relative; display: block; padding: 27px 0 24px; color: var(--muted); text-decoration: none; font-size: .82rem; font-weight: 700; letter-spacing: .12em; }
.nav-list a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 18px; height: 2px; background: var(--green-700); transform: scaleX(0); transition: transform .2s ease; }
.nav-list a:hover, .nav-list a[aria-current="page"] { color: var(--green-800); }
.nav-list a:hover::after, .nav-list a[aria-current="page"]::after { transform: scaleX(1); }
.nav-toggle { display: none; }

.hero { position: relative; overflow: hidden; background: var(--green-900); color: white; }
.hero::before, .hero::after { content: ""; position: absolute; border: 1px solid rgba(255,255,255,.1); border-radius: 50%; }
.hero::before { width: 520px; height: 520px; right: -170px; top: -250px; }
.hero::after { width: 360px; height: 360px; right: 40px; bottom: -240px; }
.hero-inner { position: relative; z-index: 1; width: min(calc(100% - 48px), var(--max)); margin: auto; min-height: 650px; padding: 104px 0; display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr); align-items: center; gap: 72px; }
.eyebrow { margin-bottom: 14px; color: var(--green-600); font-size: .74rem; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.hero .eyebrow, .contact-cta .eyebrow { color: #9ed2bf; }
.hero h1 { margin: 0 0 28px; font-size: clamp(2.65rem, 5vw, 4rem); font-weight: 750; letter-spacing: -.04em; }
.hero-line { display: block; white-space: nowrap; }
.hero-line-accent { color: #b8ddcf; }
.hero-lead { max-width: 720px; margin-bottom: 34px; color: rgba(255,255,255,.82); font-size: 1.08rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 12px 22px; border: 1px solid transparent; border-radius: 6px; font-weight: 700; text-decoration: none; transition: transform .2s ease, background .2s ease, color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: white; color: var(--green-900); }
.button-primary:hover { background: #e7f2ed; color: var(--green-900); }
.button-secondary { border-color: rgba(255,255,255,.45); color: white; }
.button-secondary:hover { background: rgba(255,255,255,.1); color: white; }
.button-light { background: white; color: var(--green-900); }
.profile-panel { padding: 32px; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.18); box-shadow: 0 24px 80px rgba(0,0,0,.12); }
.profile-label { margin-bottom: 42px; color: #9ed2bf; font-size: .72rem; font-weight: 800; letter-spacing: .18em; }
.profile-panel h2 { margin-bottom: 4px; font-size: 2rem; }
.profile-en { color: rgba(255,255,255,.65); }
.profile-panel dl { margin: 32px 0 0; }
.profile-panel dl div { padding: 15px 0; border-top: 1px solid rgba(255,255,255,.14); }
.profile-panel dt { margin-bottom: 4px; color: #9ed2bf; font-size: .7rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.profile-panel dd { margin: 0; color: rgba(255,255,255,.88); font-size: .92rem; }
.profile-panel .placeholder { color: #ffe7a1; background: transparent; padding: 0; }

.section { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; padding: 96px 0; }
.section-soft { width: 100%; max-width: none; padding-left: max(24px, calc((100% - var(--max))/2)); padding-right: max(24px, calc((100% - var(--max))/2)); background: var(--soft); }
.section-heading { margin-bottom: 40px; }
.section-heading h2 { margin: 0; font-size: clamp(1.8rem, 4vw, 2.9rem); }
.split-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; }
.text-link { font-weight: 700; text-decoration: none; border-bottom: 1px solid currentColor; }
.news-list { border-top: 1px solid var(--line); }
.news-item { display: grid; grid-template-columns: 110px 110px minmax(0,1fr); align-items: center; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.news-item time { color: var(--muted); font-size: .88rem; font-variant-numeric: tabular-nums; }
.news-item h3 { margin: 0; font-size: 1rem; font-weight: 650; }
.news-item h3 a { color: var(--ink); text-decoration: none; }
.tag { display: inline-flex; width: fit-content; align-items: center; justify-content: center; min-height: 25px; padding: 2px 9px; border: 1px solid #9ab7aa; color: var(--green-700); font-size: .69rem; font-weight: 700; letter-spacing: .05em; }
.tag-plan { border-color: #d9b45c; color: #815f0c; background: #fff7dc; }
.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 20px; }
.feature-card { position: relative; min-height: 330px; padding: 32px; display: flex; flex-direction: column; background: white; border: 1px solid var(--line); }
.feature-card-wide { grid-row: span 2; min-height: 580px; display: flex; flex-direction: column; justify-content: flex-end; background: var(--green-800); color: white; border-color: var(--green-800); }
.feature-card h3 { margin: 0 0 15px; font-size: 1.55rem; }
.feature-card p { color: var(--muted); }
.feature-grid-two .feature-card p { flex: 1; }
.feature-grid-two .feature-card .text-link { width: fit-content; margin-top: 24px; }
.feature-card-wide p { max-width: 520px; color: rgba(255,255,255,.78); }
.feature-card-wide .text-link { width: fit-content; color: white; }
.card-number { display: block; margin-bottom: 64px; color: var(--green-600); font-size: .72rem; font-weight: 800; letter-spacing: .14em; }
.feature-card-wide .card-number { color: #9ed2bf; }
.capability-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.capability-grid article { padding: 32px; }
.capability-grid article + article { border-left: 1px solid var(--line); }
.capability-grid h3 { margin-bottom: 12px; color: var(--green-800); font-size: 1.1rem; }
.capability-grid p { color: var(--muted); }
.contact-cta { width: min(calc(100% - 48px), var(--max)); margin: 0 auto 96px; padding: 52px; display: flex; align-items: center; justify-content: space-between; gap: 32px; background: var(--green-900); color: white; }
.contact-cta h2 { margin-bottom: 12px; font-size: 2rem; }
.contact-cta p { color: rgba(255,255,255,.72); }

.page-header { background: var(--soft); border-bottom: 1px solid var(--line); }
.page-header-inner { width: min(calc(100% - 48px), var(--max)); margin: auto; padding: 82px 0 76px; }
.page-header h1 { margin: 0 0 16px; font-size: clamp(2.8rem, 7vw, 5.4rem); letter-spacing: -.04em; }
.page-header p:last-child { max-width: 720px; color: var(--muted); font-size: 1.05rem; }
.research-header { background: var(--green-900); color: white; }
.research-header .eyebrow { color: #9ed2bf; }
.research-header p:last-child { color: rgba(255,255,255,.72); }

.profile-section { display: grid; grid-template-columns: 320px 1fr; gap: 72px; align-items: center; }
.portrait-placeholder { aspect-ratio: 4 / 5; display: grid; place-content: center; text-align: center; background: var(--green-100); border: 1px solid #c4d9d0; color: var(--green-800); }
.portrait-placeholder span { font-size: 4rem; font-weight: 800; letter-spacing: .08em; }
.portrait-placeholder p { margin: 16px 0 0; font-size: .78rem; letter-spacing: .08em; }
.profile-content h2 { margin: 0 0 26px; font-size: 2.5rem; }
.profile-content h2 small { display: block; margin-top: 8px; color: var(--muted); font-size: .85rem; font-weight: 500; letter-spacing: .08em; }
.lead { font-size: 1.12rem; font-weight: 600; }
.definition-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); border-top: 1px solid var(--line); }
.definition-grid div { display: grid; grid-template-columns: 145px 1fr; gap: 20px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.definition-grid div:nth-child(odd) { padding-right: 32px; }
.definition-grid div:nth-child(even) { padding-left: 32px; border-left: 1px solid var(--line); }
.definition-grid dt { color: var(--green-700); font-size: .74rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.definition-grid dd { margin: 0; }
.skill-groups { display: grid; gap: 18px; }
.skill-groups article { display: grid; grid-template-columns: 190px 1fr; align-items: start; gap: 24px; padding: 24px 0; border-top: 1px solid var(--line); }
.skill-groups article:last-child { border-bottom: 1px solid var(--line); }
.skill-groups h3 { margin: 4px 0 0; font-size: 1rem; }
.chip-list { display: flex; flex-wrap: wrap; gap: 8px; }
.chip-list span { display: inline-flex; padding: 6px 11px; background: var(--soft); border: 1px solid var(--line); color: var(--green-800); font-size: .78rem; font-weight: 650; }
.timeline { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.timeline li { display: grid; grid-template-columns: 150px 1fr; gap: 34px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.timeline time { color: var(--green-700); font-weight: 800; font-variant-numeric: tabular-nums; }
.timeline h3 { margin-bottom: 6px; }
.timeline p { color: var(--muted); }

.news-archive { border-top: 1px solid var(--line); }
.archive-item { display: grid; grid-template-columns: 220px 1fr; gap: 50px; padding: 42px 0; border-bottom: 1px solid var(--line); scroll-margin-top: 100px; }
.archive-meta { display: flex; flex-wrap: wrap; align-content: flex-start; gap: 8px; }
.archive-meta time { flex-basis: 100%; margin-bottom: 8px; color: var(--muted); font-variant-numeric: tabular-nums; }
.archive-item h3 { margin-bottom: 14px; font-size: 1.35rem; }
.archive-item p { color: var(--muted); }
.note { padding: 12px 15px; background: var(--soft); border-left: 3px solid var(--green-600); font-size: .88rem; }

.research-article { scroll-margin-top: 90px; }
.research-title { max-width: 900px; margin-bottom: 64px; }
.research-title h2 { margin: 0 0 24px; font-size: clamp(2rem, 5vw, 3.7rem); letter-spacing: -.025em; }
.research-summary { margin-bottom: 26px; color: var(--muted); font-size: 1.1rem; }
.research-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 80px; align-items: start; }
.research-main section { padding: 0 0 48px; }
.research-main section + section { padding-top: 48px; border-top: 1px solid var(--line); }
.research-main h3 { margin-bottom: 20px; font-size: 1.45rem; }
.research-main p { color: var(--muted); }
.process-flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr; align-items: center; gap: 10px; margin: 28px 0; }
.process-flow div { min-height: 152px; padding: 20px 16px; display: flex; flex-direction: column; justify-content: center; background: var(--soft); border-top: 3px solid var(--green-600); }
.process-flow span { color: var(--green-600); font-size: .68rem; font-weight: 800; }
.process-flow strong { margin: 6px 0; }
.process-flow small { color: var(--muted); line-height: 1.55; }
.process-flow i { color: var(--green-600); font-style: normal; }
.detail-list { margin: 26px 0 0; padding-left: 1.3em; }
.detail-list li { margin: 10px 0; color: var(--muted); }
.detail-list strong { color: var(--ink); }
.research-sidebar { position: sticky; top: 108px; border-top: 3px solid var(--green-700); }
.research-sidebar section { padding: 22px 0; border-bottom: 1px solid var(--line); }
.research-sidebar h3 { margin-bottom: 8px; color: var(--green-700); font-size: .76rem; letter-spacing: .08em; text-transform: uppercase; }
.research-sidebar p { color: var(--muted); font-size: .9rem; }
.future-card h3 { margin: 16px 0 0; font-size: 1.7rem; }
.future-card p { color: var(--muted); }

.link-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.link-card { min-height: 112px; padding: 20px; display: grid; grid-template-columns: 54px 1fr auto; align-items: center; gap: 18px; color: var(--ink); border: 1px solid var(--line); text-decoration: none; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.link-card:hover { color: var(--ink); transform: translateY(-3px); box-shadow: var(--shadow); border-color: #a9c5b9; }
.link-icon { width: 50px; height: 50px; display: grid; place-items: center; background: var(--green-800); color: white; font-size: .72rem; font-weight: 800; }
.link-card strong, .link-card small { display: block; }
.link-card small { margin-top: 4px; color: var(--muted); }
.link-grid-single { max-width: 720px; }
.placeholder-card { border-style: dashed; }
.contact-card { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; padding: 40px; border: 1px solid var(--line); }
.contact-card h3 { margin-bottom: 10px; color: var(--green-700); font-size: .8rem; letter-spacing: .08em; text-transform: uppercase; }
.contact-address { width: fit-content; margin-bottom: 12px; font-size: 1.45rem; font-weight: 750; }
.email-protected { margin-bottom: 14px; }
.email-reveal { min-height: 44px; padding: 10px 16px; border: 1px solid var(--green-700); background: #fff; color: var(--green-800); font: inherit; font-weight: 700; cursor: pointer; }
.email-reveal:hover { background: var(--green-100); }
.email-reveal:focus-visible { outline: 3px solid #f1c75b; outline-offset: 3px; }
.email-link { color: var(--green-700); text-underline-offset: .18em; overflow-wrap: anywhere; }
.email-noscript { margin: 0 0 12px; font-size: .9rem; }
.contact-card p { color: var(--muted); }
.privacy-note { padding-left: 48px; border-left: 1px solid var(--line); }

.site-footer { padding: 52px 0; background: #0d1914; color: white; }
.footer-inner { width: min(calc(100% - 48px), var(--max)); margin: auto; display: flex; justify-content: space-between; gap: 48px; }
.site-footer strong { display: block; margin-bottom: 8px; }
.site-footer p { margin: 4px 0; color: rgba(255,255,255,.6); font-size: .78rem; }
.site-footer .placeholder { color: #f4d67e; background: transparent; padding: 0; }
.footer-meta { text-align: right; }
.template-credit a { color: rgba(255,255,255,.48); }
.page-top { position: fixed; right: 22px; bottom: 22px; z-index: 90; width: 46px; height: 46px; border: 0; background: var(--green-800); color: white; cursor: pointer; opacity: 0; pointer-events: none; transform: translateY(8px); transition: .2s ease; }
.page-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }

@media (max-width: 900px) {
  .header-inner { min-height: 68px; }
  .nav-toggle { display: grid; gap: 5px; width: 46px; height: 46px; place-content: center; border: 1px solid var(--line); background: white; cursor: pointer; }
  .nav-toggle span:not(.sr-only) { display: block; width: 22px; height: 2px; background: var(--green-800); transition: transform .2s ease, opacity .2s ease; }
  .nav-toggle[aria-expanded="true"] span:nth-of-type(2) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-of-type(3) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-of-type(4) { transform: translateY(-7px) rotate(-45deg); }
  .nav-list { position: fixed; inset: 68px 0 auto; display: none; padding: 18px 24px 28px; background: white; border-bottom: 1px solid var(--line); box-shadow: 0 20px 40px rgba(11,59,44,.08); }
  .nav-list.is-open { display: block; }
  .nav-list a { padding: 14px 4px; border-bottom: 1px solid var(--line); }
  .nav-list a::after { display: none; }
  .hero-inner { grid-template-columns: 1fr; min-height: auto; padding: 76px 0; gap: 48px; }
  .profile-panel { max-width: 560px; }
  .profile-section { grid-template-columns: 240px 1fr; gap: 42px; }
  .research-layout { grid-template-columns: 1fr; gap: 20px; }
  .research-sidebar { position: static; display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; border-top: 0; }
  .research-sidebar section { border-top: 3px solid var(--green-700); }
  .process-flow { grid-template-columns: repeat(2,1fr); }
  .process-flow i { display: none; }
}

@media (max-width: 680px) {
  body { font-size: 16px; line-height: 1.75; }
  .header-inner, .hero-inner, .section, .page-header-inner, .contact-cta, .footer-inner { width: min(calc(100% - 32px), var(--max)); }
  .site-identity small { display: none; }
  .hero { text-align: left; }
  .hero h1 { font-size: clamp(2rem, 9vw, 2.4rem); }
  .hero-line { white-space: nowrap; }
  .hero-actions .button { width: 100%; }
  .profile-panel { padding: 24px; }
  .section { padding-top: 68px; padding-bottom: 68px; }
  .section-soft { padding-left: 16px; padding-right: 16px; }
  .split-heading { align-items: start; }
  .news-item { grid-template-columns: 100px 1fr; gap: 8px 14px; }
  .news-item h3 { grid-column: 1 / -1; }
  .feature-grid, .capability-grid, .definition-grid, .link-grid, .contact-card { grid-template-columns: 1fr; }
  .feature-card-wide { grid-row: auto; min-height: 420px; }
  .capability-grid article + article { border-left: 0; border-top: 1px solid var(--line); }
  .contact-cta { margin-bottom: 68px; padding: 34px 24px; flex-direction: column; align-items: start; }
  .profile-section { grid-template-columns: 1fr; gap: 36px; }
  .portrait-placeholder { max-width: 320px; }
  .definition-grid div, .definition-grid div:nth-child(odd), .definition-grid div:nth-child(even) { grid-template-columns: 120px 1fr; padding: 20px 0; border-left: 0; }
  .skill-groups article { grid-template-columns: 1fr; gap: 12px; }
  .timeline li { grid-template-columns: 1fr; gap: 8px; }
  .archive-item { grid-template-columns: 1fr; gap: 18px; }
  .research-title h2 br { display: none; }
  .research-sidebar { grid-template-columns: 1fr; }
  .process-flow { grid-template-columns: 1fr; }
  .future-card { gap: 24px; padding: 28px 22px; }
  .contact-card { gap: 30px; padding: 28px 22px; }
  .privacy-note { padding: 28px 0 0; border-left: 0; border-top: 1px solid var(--line); }
  .contact-address { font-size: 1.05rem; }
  .footer-inner { flex-direction: column; }
  .footer-meta { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}