:root {
  --navy: #0a1937;
  --navy-deep: #050d1f;
  --navy-mid: #122a52;
  --kinari: #f5f3ee;
  --kinari-warm: #ebe6db;
  --gold: #c9a961;
  --gold-deep: #8a6f33;
  --ink: #1a1a1a;
  --ink-soft: #4a4a4a;
  --line: rgba(10, 25, 55, 0.14);
  --line-light: rgba(245, 243, 238, 0.18);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Noto Sans JP", "Hiragino Sans", sans-serif;
  color: var(--ink);
  background: var(--kinari);
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
.skip-link {
  position: fixed; top: 8px; left: 8px; z-index: 1000;
  padding: 10px 14px; background: var(--kinari); color: var(--navy-deep);
  font-weight: 700; transform: translateY(-140%); transition: transform .2s;
}
.skip-link:focus { transform: translateY(0); }
:where(a, button):focus-visible { outline: 3px solid #d7ad4f; outline-offset: 3px; }
.container { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }
.container-narrow { width: min(820px, calc(100% - 48px)); margin-inline: auto; }

/* Header */
header.site-header {
  position: fixed; inset: 0 0 auto; z-index: 100;
  padding: 16px 32px; background: rgba(10, 25, 55, .95);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--line-light);
}
header.site-header .inner {
  max-width: 1400px; margin: 0 auto; display: flex; align-items: center;
  justify-content: space-between; gap: 24px;
}
.logo { display: flex; align-items: center; gap: 12px; color: var(--kinari); }
.logo-mark {
  width: 38px; height: 38px; border: 1.5px solid var(--gold);
  display: grid; place-items: center; color: var(--gold);
  font-family: "Noto Serif JP", serif; font-weight: 700; font-size: 20px;
}
.logo-text { line-height: 1.2; }
.logo-text .ja, .logo-text .en { display: block; }
.logo-text .ja { font-family: "Noto Serif JP", serif; font-size: 16px; font-weight: 600; letter-spacing: .08em; }
.logo-text .en { font-family: "Cormorant Garamond", serif; font-style: italic; font-size: 11px; color: var(--gold); letter-spacing: .12em; }
nav.main-nav { display: flex; gap: 24px; align-items: center; }
nav.main-nav a { color: var(--kinari); font-size: 13px; letter-spacing: .06em; padding: 4px 0; }
nav.main-nav a:hover, nav.main-nav a.current { color: var(--gold); }
.header-cta {
  background: var(--gold); color: var(--navy-deep); padding: 10px 20px;
  font-size: 13px; font-weight: 700; letter-spacing: .06em;
}
.header-cta:hover { background: #e6c046; color: var(--navy-deep); }
.menu-btn { display: none; background: none; border: 0; color: var(--kinari); font-size: 24px; cursor: pointer; }

/* Page hero */
.page-hero {
  color: var(--kinari); background: var(--navy-deep); padding: 152px 0 84px;
  position: relative; overflow: hidden;
}
.page-hero::after {
  content: ""; position: absolute; width: 460px; height: 460px; right: -120px; top: -180px;
  border: 1px solid rgba(201, 169, 97, .2); border-radius: 50%;
  box-shadow: 0 0 0 80px rgba(201, 169, 97, .035), 0 0 0 160px rgba(201, 169, 97, .025);
}
.breadcrumb { position: relative; z-index: 1; font-size: 12px; color: rgba(245,243,238,.58); margin-bottom: 28px; }
.breadcrumb span { margin: 0 8px; color: rgba(245,243,238,.3); }
.eyebrow {
  position: relative; z-index: 1; color: var(--gold); font-family: "Cormorant Garamond", serif;
  font-style: italic; letter-spacing: .18em; font-size: 14px; text-transform: uppercase;
}
.page-hero h1 {
  position: relative; z-index: 1; font-family: "Noto Serif JP", serif; font-weight: 700;
  font-size: clamp(30px, 5vw, 52px); line-height: 1.45; letter-spacing: .03em;
  max-width: 920px; margin: 16px 0 24px;
}
.page-hero h1 em { color: var(--gold); font-style: normal; }
.hero-lead { position: relative; z-index: 1; max-width: 760px; font-size: 17px; color: rgba(245,243,238,.8); line-height: 2; }
.hero-facts { position: relative; z-index: 1; display: flex; gap: 12px; flex-wrap: wrap; margin-top: 34px; }
.hero-facts span { flex: 0 0 auto; border: 1px solid rgba(245,243,238,.2); padding: 8px 14px; color: rgba(245,243,238,.82); font-size: 13px; }
.page-hero.with-photo { min-height: 700px; display: flex; align-items: center; isolation: isolate; }
.page-hero.with-photo::before {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background: linear-gradient(90deg, rgba(5,13,31,.97) 0%, rgba(5,13,31,.9) 47%, rgba(5,13,31,.3) 76%, rgba(5,13,31,.12) 100%);
}
.page-hero.with-photo::after { z-index: 0; right: -170px; opacity: .75; }
.page-hero-bg { position: absolute; inset: 0; z-index: -1; margin: 0; }
.page-hero-bg img { width: 100%; height: 100%; object-fit: cover; object-position: center 48%; }
.page-hero.with-photo .container { position: relative; z-index: 1; }
.page-hero.with-photo h1 { max-width: 690px; }
.page-hero.with-photo .hero-lead { max-width: 680px; }

/* Main content */
.section { padding: 80px 0; }
.section.alt { background: var(--kinari-warm); }
.section.navy { background: var(--navy); color: var(--kinari); }
.section-head { max-width: 760px; margin-bottom: 38px; }
.section-head h2 {
  font-family: "Noto Serif JP", serif; color: var(--navy); font-size: clamp(26px, 4vw, 38px);
  line-height: 1.5; font-weight: 600; margin: 10px 0 16px;
}
.navy .section-head h2 { color: var(--kinari); }
.section-head p { color: var(--ink-soft); font-size: 15.5px; }
.navy .section-head p { color: rgba(245,243,238,.7); }
.prose { max-width: 820px; }
.prose h2 { font-family: "Noto Serif JP", serif; color: var(--navy); font-size: 28px; margin: 50px 0 18px; line-height: 1.5; }
.prose h3 { font-family: "Noto Serif JP", serif; color: var(--navy-mid); font-size: 20px; margin: 32px 0 12px; }
.prose p { font-size: 16px; margin-bottom: 20px; color: var(--ink-soft); }
.prose strong { color: var(--navy); }
.prose ul { margin: 0 0 24px 1.4em; }
.prose li { margin-bottom: 9px; color: var(--ink-soft); }
.text-link { color: var(--gold-deep); text-decoration: underline; text-underline-offset: 3px; font-weight: 500; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.photo-copy-grid { display: grid; grid-template-columns: 1.04fr .96fr; gap: 52px; align-items: center; }
.content-photo { position: relative; margin: 0; background: var(--navy); overflow: hidden; box-shadow: 18px 18px 0 rgba(201,169,97,.18); }
.content-photo img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.content-photo figcaption {
  position: absolute; left: 18px; right: 18px; bottom: 18px; padding: 12px 14px;
  color: var(--kinari); background: rgba(5,13,31,.88); font-size: 12px; line-height: 1.65;
}
.content-photo figcaption strong { color: #f2d58d; font-weight: 700; }
.card { background: #fff; border: 1px solid var(--line); padding: 28px; }
.card .num { font-family: "Cormorant Garamond", serif; color: var(--gold-deep); font-size: 16px; font-style: italic; }
.card h3 { font-family: "Noto Serif JP", serif; color: var(--navy); font-size: 19px; line-height: 1.55; margin: 10px 0 12px; }
.card p { color: var(--ink-soft); font-size: 14.5px; }
.check-list { list-style: none; display: grid; gap: 12px; margin-top: 28px; }
.check-list li { background: #fff; border: 1px solid var(--line); padding: 15px 18px 15px 46px; position: relative; color: var(--ink-soft); }
.check-list li::before { content: "✓"; position: absolute; left: 18px; color: var(--gold-deep); font-weight: 700; }
.price-panel { background: #fff; border: 1px solid var(--line); padding: 36px; display: grid; grid-template-columns: 1.1fr 1fr; gap: 32px; align-items: center; }
.price-main { font-family: "Noto Serif JP", serif; color: var(--navy); font-size: 21px; }
.price-main strong { display: block; font-size: clamp(38px, 6vw, 58px); line-height: 1.2; color: var(--gold-deep); }
.price-main small, .price-detail { color: var(--ink-soft); font-size: 13px; }
.price-detail ul { padding-left: 1.2em; }
.price-detail li { margin: 6px 0; }
.note-box { background: #fff; border-left: 4px solid var(--gold); padding: 24px 26px; margin-top: 32px; color: var(--ink-soft); }
.button-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 30px; }
.btn-primary, .btn-secondary { display: inline-flex; align-items: center; justify-content: center; padding: 15px 28px; font-weight: 700; font-size: 14px; letter-spacing: .04em; }
.btn-primary { background: var(--gold); color: var(--navy-deep); }
.btn-primary:hover { background: #e6c046; }
.btn-secondary { border: 1px solid var(--line); background: #fff; color: var(--navy); }
.navy .btn-secondary { color: var(--kinari); border-color: rgba(245,243,238,.28); background: transparent; }
.faq-list { display: grid; gap: 14px; }
.faq-item { background: #fff; border: 1px solid var(--line); padding: 24px 26px; }
.faq-item h3 { font-family: "Noto Serif JP", serif; color: var(--navy); font-size: 17px; margin-bottom: 10px; }
.faq-item h3::before { content: "Q."; color: var(--gold-deep); margin-right: 9px; }
.faq-item p { color: var(--ink-soft); font-size: 14.5px; }

/* About */
.profile-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; }
.profile-photo { aspect-ratio: 4/5; overflow: hidden; background: var(--navy); }
.profile-photo img { width: 100%; height: 100%; object-fit: cover; }
.profile-role { display: inline-block; color: var(--gold-deep); font-size: 13px; letter-spacing: .1em; margin-bottom: 12px; }
.profile-copy h2 { font-family: "Noto Serif JP", serif; color: var(--navy); font-size: clamp(27px, 4vw, 40px); line-height: 1.55; margin-bottom: 22px; }
.profile-copy p { color: var(--ink-soft); margin-bottom: 18px; }
.history { display: grid; gap: 0; border-top: 1px solid var(--line); margin-top: 30px; }
.history div { display: grid; grid-template-columns: 150px 1fr; gap: 20px; border-bottom: 1px solid var(--line); padding: 16px 0; }
.history dt { font-weight: 700; color: var(--navy); }
.history dd { color: var(--ink-soft); }
.external-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.external-list a { background: #fff; border: 1px solid var(--line); padding: 18px; color: var(--navy); font-weight: 600; }
.external-list a:hover { border-color: var(--gold); }

/* Case studies */
.case-hero-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 48px; align-items: center; }
.case-shot { background: #fff; padding: 10px; box-shadow: 0 22px 60px rgba(5,13,31,.2); }
.case-shot img { width: 100%; aspect-ratio: 16/10; object-fit: cover; object-position: top; }
.demo-notice { border: 1px solid rgba(201,169,97,.42); color: #f2d58d; padding: 13px 16px; font-size: 13px; margin-top: 24px; }
.case-meta { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); background: #fff; margin-bottom: 40px; }
.case-meta div { padding: 20px; border-right: 1px solid var(--line); }
.case-meta div:last-child { border-right: 0; }
.case-meta dt { font-size: 12px; color: var(--gold-deep); margin-bottom: 4px; }
.case-meta dd { color: var(--navy); font-weight: 600; }
.point-list { counter-reset: point; display: grid; gap: 20px; }
.point { background: #fff; border: 1px solid var(--line); padding: 28px; counter-increment: point; }
.point h3 { font-family: "Noto Serif JP", serif; color: var(--navy); font-size: 20px; margin-bottom: 10px; }
.point h3::before { content: counter(point, decimal-leading-zero); color: var(--gold-deep); margin-right: 12px; font-family: "Cormorant Garamond", serif; font-style: italic; }
.point p { color: var(--ink-soft); font-size: 15px; }
.works-nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.works-nav a { background: #fff; border: 1px solid var(--line); padding: 18px; }
.works-nav strong { display: block; color: var(--navy); font-family: "Noto Serif JP", serif; }
.works-nav span { color: var(--ink-soft); font-size: 12px; }

/* Footer */
footer { background: var(--navy); color: rgba(245,243,238,.78); padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.4fr; gap: 48px; margin-bottom: 50px; }
.footer-brand .logo { margin-bottom: 22px; }
.footer-brand p { font-size: 12px; line-height: 2; color: rgba(245,243,238,.5); }
.footer-col h2 { font-family: "Cormorant Garamond", serif; color: var(--gold); font-size: 14px; letter-spacing: .14em; margin-bottom: 14px; }
.footer-col ul { list-style: none; }
.footer-col li { font-size: 13px; padding: 5px 0; }
.footer-col a:hover { color: var(--gold); }
.footer-info { font-size: 12px; line-height: 1.9; }
.footer-info dt { color: rgba(245,243,238,.4); margin-top: 8px; }
.footer-info dd { color: rgba(245,243,238,.85); }
.footer-bottom { border-top: 1px solid var(--line-light); padding-top: 22px; display: flex; justify-content: space-between; gap: 20px; font-size: 11px; color: rgba(245,243,238,.4); }
.footer-bottom a { margin-left: 16px; }

@media (max-width: 900px) {
  nav.main-nav { display: none; }
  nav.main-nav.open {
    display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--navy-deep); padding: 24px 32px; gap: 18px; border-top: 1px solid var(--line-light);
  }
  .menu-btn { display: block; }
  .grid-3, .works-nav { grid-template-columns: 1fr 1fr; }
  .profile-grid, .case-hero-grid, .photo-copy-grid { grid-template-columns: 1fr; }
  .photo-copy-grid { gap: 34px; }
  .profile-photo { max-height: 520px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  header.site-header { padding: 14px 18px; }
  .container, .container-narrow { width: min(100% - 32px, 1120px); }
  .page-hero { padding: 126px 0 64px; }
  .page-hero.with-photo { min-height: 720px; align-items: end; }
  .page-hero.with-photo::before { background: linear-gradient(180deg, rgba(5,13,31,.18) 0%, rgba(5,13,31,.72) 34%, rgba(5,13,31,.98) 69%); }
  .page-hero-bg img { object-position: 66% center; }
  .hero-lead { font-size: 15px; }
  .section { padding: 58px 0; }
  .grid-3, .grid-2, .works-nav, .external-list, .price-panel { grid-template-columns: 1fr; }
  .card, .point { padding: 22px; }
  .content-photo { box-shadow: 10px 10px 0 rgba(201,169,97,.18); }
  .content-photo figcaption { position: static; }
  .case-meta { grid-template-columns: 1fr; }
  .case-meta div { border-right: 0; border-bottom: 1px solid var(--line); }
  .case-meta div:last-child { border-bottom: 0; }
  .history div { grid-template-columns: 1fr; gap: 4px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; }
  .footer-bottom a { margin: 0 14px 0 0; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}