:root {
  --paper: #f3f1eb;
  --paper-soft: #ebe8df;
  --ink: #242521;
  --muted: #67685f;
  --olive: #777a62;
  --olive-dark: #5d604c;
  --line: rgba(36, 37, 33, .18);
  --max: 1180px;
  --header: 68px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header); }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", YuGothic, "Noto Sans JP", sans-serif; font-size: 16px; line-height: 1.95; letter-spacing: .035em; line-break: strict; }
a { color: inherit; }
p, h1, h2, h3, blockquote { margin-top: 0; }
p { text-wrap: pretty; }
.nowrap { white-space: nowrap; }
.mobile-only { display: none; }
.skip-link { position: fixed; z-index: 100; top: -100px; left: 1rem; padding: .7rem 1rem; background: var(--ink); color: white; }
.skip-link:focus { top: 1rem; }
.section-pad { padding-left: max(24px, calc((100vw - var(--max)) / 2)); padding-right: max(24px, calc((100vw - var(--max)) / 2)); }

.site-header { position: fixed; z-index: 50; top: 0; left: 0; width: 100%; height: var(--header); display: flex; align-items: center; justify-content: space-between; padding: 0 max(20px, calc((100vw - var(--max)) / 2)); background: rgba(243,241,235,.92); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
.brand { display: inline-flex; align-items: center; gap: .7rem; text-decoration: none; font-weight: 700; letter-spacing: .08em; }
.brand-mark { display: grid; place-items: center; width: 30px; height: 30px; color: var(--paper); background: var(--ink); font-family: Georgia, serif; font-size: 1.1rem; }
.global-nav { display: flex; align-items: center; gap: 2rem; font-size: .85rem; font-weight: 600; }
.global-nav a { text-decoration: none; }
.global-nav a:hover, .global-nav a:focus-visible { color: var(--olive-dark); }
.nav-cta { padding: .55rem 1rem; border: 1px solid var(--ink); }
.menu-button { display: none; }

.hero { min-height: 100svh; padding-top: calc(var(--header) + 10vh); padding-bottom: 8vh; display: grid; grid-template-columns: 1fr minmax(280px, .45fr); grid-template-rows: auto 1fr auto; gap: 1.5rem 4rem; border-bottom: 1px solid var(--line); }
.hero-index { grid-column: 1 / -1; align-self: start; color: var(--olive-dark); font-family: Georgia, serif; font-size: .72rem; letter-spacing: .18em; }
.hero h1 { align-self: center; font-family: "Yu Mincho", YuMincho, "Hiragino Mincho ProN", serif; font-size: clamp(3.3rem, 5.2vw, 5.5rem); font-weight: 500; line-height: 1.3; letter-spacing: -.055em; text-wrap: balance; font-kerning: normal; }
.hero-line { display: block; }
.hero-line + .hero-line { margin-top: .04em; }
.hero-copy { align-self: end; padding-bottom: 5vh; }
.hero-copy p { color: var(--muted); }
.hero-copy .lead { margin-top: 2.5rem; color: var(--ink); font-size: clamp(1.2rem, 2vw, 1.6rem); font-weight: 600; line-height: 1.7; }
.hero-copy em { color: var(--olive-dark); font-style: normal; border-bottom: 2px solid var(--olive); }
.scroll-cue { grid-column: 1 / -1; display: flex; justify-content: space-between; padding-top: 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .75rem; text-decoration: none; letter-spacing: .12em; }

.section { padding-top: clamp(90px, 12vw, 170px); padding-bottom: clamp(90px, 12vw, 170px); border-bottom: 1px solid var(--line); }
.eyebrow { margin-bottom: clamp(2.5rem, 6vw, 5rem); color: var(--olive-dark); font-size: .78rem; font-weight: 700; letter-spacing: .13em; }
.eyebrow::before { content: "—"; margin-right: .7rem; }
.two-column { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(300px, .75fr); gap: clamp(3rem, 9vw, 9rem); }
h2 { margin-bottom: 0; font-family: "Yu Mincho", YuMincho, "Hiragino Mincho ProN", serif; font-size: clamp(2.1rem, 4.3vw, 4.1rem); font-weight: 500; line-height: 1.45; letter-spacing: -.035em; text-wrap: balance; font-kerning: normal; }
.prose p { margin-bottom: 2rem; }
.prose p:last-child { margin-bottom: 0; }
.strong-copy { font-size: 1.12rem; font-weight: 700; }
.statement { margin: clamp(5rem, 12vw, 11rem) 0 0 auto; max-width: 900px; font-family: "Yu Mincho", YuMincho, serif; font-size: clamp(2.6rem, 6vw, 6rem); line-height: 1.42; letter-spacing: -.045em; }
.soft-section { background: var(--paper-soft); }

.fact-section { background: var(--olive); color: var(--paper); }
.fact-section .eyebrow { color: #eceadf; }
.comparison-heading { align-items: end; }
.fact-section .comparison-heading > p { color: #eae8dd; }
.comparison-flow { display: grid; grid-template-columns: 1fr auto 1fr; gap: clamp(1.5rem, 4vw, 4rem); align-items: stretch; margin-top: 2rem; }
.comparison-side { padding: clamp(1.5rem, 3vw, 3rem); border: 1px solid rgba(243,241,235,.22); }
.comparison-side--focus { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.comparison-label { margin-bottom: 2rem; color: #bdbdb4; font-size: .78rem; font-weight: 700; letter-spacing: .1em; }
.comparison-side--focus .comparison-label { color: var(--olive-dark); }
.comparison-number { display: flex; align-items: baseline; gap: 1rem; margin-bottom: 2rem; font-family: Georgia, serif; font-size: clamp(4rem, 8vw, 7.5rem); line-height: 1; }
.comparison-number small { font-family: "Yu Gothic", YuGothic, sans-serif; font-size: .13em; font-weight: 700; letter-spacing: .06em; }
.scope-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: .7rem; margin: 0; padding: 0; list-style: none; color: #d1d1c8; font-size: .86rem; }
.scope-list li { padding-top: .6rem; border-top: 1px solid rgba(243,241,235,.18); }
.comparison-result { margin-bottom: 0; color: var(--muted); }
.comparison-arrow { align-self: center; color: #b4b49b; font-family: Georgia, serif; font-size: 1.7rem; }
.fact-metrics { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: clamp(3rem, 7vw, 6rem); border-top: 1px solid rgba(243,241,235,.35); border-bottom: 1px solid rgba(243,241,235,.35); }
.fact-metrics div { padding: 1.6rem 1.5rem; border-right: 1px solid rgba(243,241,235,.2); }
.fact-metrics div:last-child { border-right: 0; }
.fact-metrics span, .fact-metrics strong { display: block; }
.fact-metrics span { margin-bottom: .55rem; color: #a9a9a0; font-size: .74rem; }
.fact-metrics strong { font-size: clamp(1rem, 2vw, 1.35rem); }
.fact-caption { max-width: 760px; margin: 1.4rem 0 0 auto; color: #96968f; font-size: .72rem; }

.cost-section { background: var(--paper-soft); }
.cost-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin: 0; padding: 1px; background: var(--line); list-style: none; }
.cost-list li { display: grid; grid-template-columns: 48px 1fr; gap: 1rem; padding: clamp(1.5rem, 3vw, 2.7rem); background: var(--paper-soft); }
.cost-list li > span { color: var(--olive-dark); font-family: Georgia, serif; font-size: .78rem; }
.cost-list h3 { margin-bottom: .8rem; font-family: "Yu Mincho", YuMincho, serif; font-size: clamp(1.25rem, 2vw, 1.65rem); font-weight: 500; line-height: 1.55; }
.cost-list p { margin-bottom: 0; color: var(--muted); }
.design-policy { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin-top: 3rem; background: var(--line); border: 1px solid var(--line); }
.design-policy > div { padding: clamp(1.5rem, 3vw, 2.5rem); background: var(--paper); }
.design-policy span { display: block; margin-bottom: .8rem; color: var(--olive-dark); font-size: .76rem; font-weight: 700; }
.design-policy p { margin-bottom: 0; }
.cost-tip { max-width: 640px; margin: 2.4rem 0 0; padding: 1rem 1.3rem; background: var(--paper); border-left: 2px solid var(--olive-dark); color: var(--ink); font-size: .86rem; line-height: 1.75; }
.cost-caution { max-width: 800px; margin: 1.6rem 0 0 auto; padding-left: 1.4rem; border-left: 2px solid var(--olive); color: var(--muted); font-size: .86rem; }

.note { display: grid; grid-template-columns: .35fr 1fr; gap: 3rem; padding-top: clamp(55px, 7vw, 90px); padding-bottom: clamp(55px, 7vw, 90px); background: var(--olive); color: #f7f5ef; }
.note-label { font-family: Georgia, serif; font-size: .75rem; letter-spacing: .18em; }
.note > div { max-width: 740px; }
.note p { margin-bottom: 1.5rem; color: rgba(255,255,255,.84); }
.note .note-lead { color: white; font-family: "Yu Mincho", YuMincho, serif; font-size: clamp(1.5rem, 3vw, 2.4rem); line-height: 1.65; }

.section-heading { display: grid; grid-template-columns: 1fr .5fr; gap: 4rem; align-items: end; margin-bottom: clamp(3rem, 7vw, 6rem); }
.section-heading .eyebrow { margin-bottom: 2rem; }
.section-heading > p { color: var(--muted); }
.service-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--ink); }
.service-list li { display: grid; grid-template-columns: 70px minmax(230px, .7fr) 1fr; gap: 2rem; padding: 2.7rem 0; border-bottom: 1px solid var(--line); }
.service-no { color: var(--olive-dark); font-family: Georgia, serif; font-size: .85rem; }
.service-list h3 { margin-bottom: .3rem; font-family: "Yu Mincho", YuMincho, serif; font-size: clamp(1.45rem, 2.4vw, 2rem); font-weight: 500; line-height: 1.5; }
.service-list p { margin-bottom: 0; }
.service-meta { color: var(--olive-dark); font-size: .76rem; font-weight: 600; line-height: 1.6; }
.future-links { display: grid; grid-template-columns: 1.2fr repeat(3, 1fr); gap: 1rem; margin-top: 4rem; padding-top: 1.4rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .75rem; }
.future-links p { margin: 0; }
.future-links span { color: var(--ink); }
.future-links small { display: block; color: var(--olive-dark); }

.dark-section { background: var(--ink); color: var(--paper); }
.dark-section .eyebrow { color: #b4b49b; }
.dark-section .prose { color: #cecec5; }
.dark-section .experience { color: var(--paper); font-family: "Yu Mincho", YuMincho, serif; font-size: clamp(1.15rem, 2vw, 1.45rem); }

.philosophy h2 { max-width: 900px; }
.philosophy-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: clamp(4rem, 8vw, 7rem); background: var(--line); border: 1px solid var(--line); }
.philosophy-grid p { margin: 0; padding: clamp(1.5rem, 3vw, 3rem); background: var(--paper); }
blockquote { margin: clamp(5rem, 11vw, 10rem) 0 0; font-family: "Yu Mincho", YuMincho, serif; font-size: clamp(2.2rem, 5vw, 5rem); line-height: 1.45; letter-spacing: -.04em; }
blockquote span { display: block; margin-top: 1.5rem; color: var(--muted); font-family: inherit; font-size: .35em; letter-spacing: .02em; }

.contact { padding-top: clamp(90px, 12vw, 170px); padding-bottom: clamp(90px, 12vw, 170px); background: var(--olive-dark); color: #f6f4ed; }
.contact .eyebrow { color: #d2d0bf; }
.contact-grid { display: grid; grid-template-columns: 1.1fr .65fr; gap: clamp(3rem, 8vw, 8rem); }
.contact h2 { margin-bottom: 3rem; }
.contact-lead { margin-top: 2.5rem; font-weight: 700; }
.contact-card { align-self: start; padding: clamp(1.5rem, 3vw, 2.5rem); background: var(--paper); color: var(--ink); }
.contact-card-title { font-family: "Yu Mincho", YuMincho, serif; font-size: 1.55rem; }
.contact-card > p:nth-child(2) { color: var(--muted); font-size: .82rem; }
.line-button { display: flex; align-items: center; justify-content: space-between; margin-top: 1.5rem; padding: 1rem 1.15rem; background: #06c755; color: white; font-weight: 700; text-decoration: none; transition: background-color .2s, transform .2s; }
.line-button:hover, .line-button:focus-visible { background: #05ad4a; transform: translateY(-1px); }
.line-qr { display: grid; grid-template-columns: 92px 1fr; gap: 1rem; align-items: center; margin-top: 1.4rem; }
.line-qr img { display: block; width: 92px; height: 92px; }
.line-qr p { margin: 0; color: var(--muted); font-size: .75rem; line-height: 1.7; }
.contact-card dl { margin: 2rem 0 0; }
.contact-card dl > div { display: grid; grid-template-columns: 70px 1fr; gap: 1rem; padding: 1.2rem 0; border-top: 1px solid var(--line); }
.contact-card dt { color: var(--olive-dark); font-family: Georgia, serif; font-size: .75rem; letter-spacing: .1em; }
.contact-card dd { margin: 0; line-height: 1.65; }
.contact-link { text-decoration-color: var(--olive); text-underline-offset: .2em; }
.contact-link:hover, .contact-link:focus-visible { color: var(--olive-dark); }
.contact-card small { color: var(--muted); }

@media (min-width: 801px) {
  .line-button { display: none; }
}

.site-footer { display: grid; grid-template-columns: 1fr auto; gap: 1rem; align-items: end; padding-top: 4rem; padding-bottom: 3rem; background: var(--ink); color: var(--paper); }
.site-footer p { margin: 0; color: #a7a79f; font-size: .78rem; }
.ai-summary { max-width: 640px; margin-top: 1.2rem !important; line-height: 1.75; }
.last-updated { margin-top: .8rem !important; }
.footer-brand { grid-row: 1 / 3; align-self: start; }
.footer-brand .brand-mark { background: var(--paper); color: var(--ink); }
.copyright { text-align: right; }

@media (max-width: 800px) {
  :root { --header: 62px; }
  body { line-height: 1.9; letter-spacing: .02em; }
  .mobile-only { display: block; }
  .section-pad { padding-left: 22px; padding-right: 22px; }
  .site-header { padding: 0 18px; }
  .brand { font-size: .9rem; }
  .brand-mark { width: 27px; height: 27px; }
  .menu-button { display: flex; align-items: center; gap: .65rem; border: 0; padding: .7rem 0; background: transparent; color: var(--ink); font: inherit; font-size: .72rem; }
  .menu-icon, .menu-icon::before { display: block; width: 20px; height: 1px; background: currentColor; transition: transform .2s; }
  .menu-icon { position: relative; }
  .menu-icon::before { content: ""; position: absolute; top: -6px; }
  .menu-button[aria-expanded="true"] .menu-icon { transform: rotate(45deg); }
  .menu-button[aria-expanded="true"] .menu-icon::before { top: 0; transform: rotate(90deg); }
  .global-nav { position: fixed; inset: var(--header) 0 auto; display: none; align-items: stretch; gap: 0; padding: 1rem 20px 1.5rem; background: var(--paper); border-bottom: 1px solid var(--line); }
  .global-nav.is-open { display: grid; }
  .global-nav a { padding: .85rem 0; border-bottom: 1px solid var(--line); }
  .global-nav .nav-cta { margin-top: .8rem; padding: .75rem 1rem; border: 1px solid var(--ink); text-align: center; }
  .hero { display: flex; flex-direction: column; min-height: 100svh; padding-top: calc(var(--header) + 7vh); padding-bottom: 4vh; }
  .hero h1 { margin: auto 0 2.4rem; font-size: clamp(2rem, 8.6vw, 3rem); line-height: 1.42; letter-spacing: -.04em; }
  .hero-copy { padding: 0 0 3vh; }
  .hero-copy p { font-size: .92rem; }
  .hero-copy .lead { font-size: 1.15rem; }
  .two-column, .section-heading, .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
  h2 { font-size: clamp(1.9rem, 8.4vw, 2.75rem); line-height: 1.52; letter-spacing: -.03em; }
  .statement { font-size: clamp(2.1rem, 9.4vw, 3.4rem); line-height: 1.5; }
  .note { grid-template-columns: 1fr; gap: 2rem; }
  .section-heading { margin-bottom: 3rem; }
  .section-heading > p { margin-bottom: 0; }
  .service-list li { grid-template-columns: 42px 1fr; gap: 1.2rem; padding: 2.2rem 0; }
  .service-list li > p { grid-column: 2; }
  .future-links { grid-template-columns: 1fr; gap: 1rem; }
  .future-links p { margin-bottom: .5rem; }
  .future-links span { padding-top: .8rem; border-top: 1px solid var(--line); }
  .comparison-flow { grid-template-columns: 1fr; gap: 1rem; }
  .comparison-arrow { justify-self: center; transform: rotate(90deg); }
  .comparison-number { font-size: 4.8rem; }
  .fact-metrics { grid-template-columns: 1fr; }
  .fact-metrics div { display: grid; grid-template-columns: 1fr auto; align-items: baseline; gap: 1rem; padding: 1.15rem 0; border-right: 0; border-bottom: 1px solid rgba(243,241,235,.2); }
  .fact-metrics div:last-child { border-bottom: 0; }
  .fact-metrics span { margin-bottom: 0; }
  .fact-metrics strong { text-align: right; }
  .cost-list, .design-policy { grid-template-columns: 1fr; }
  .cost-list li { grid-template-columns: 35px 1fr; padding: 1.6rem 1.3rem; }
  .cost-caution { margin-top: 2rem; }
  .philosophy-grid { grid-template-columns: 1fr; }
  blockquote { font-size: clamp(2.2rem, 10vw, 3.8rem); }
  blockquote span { font-size: .4em; }
  .site-footer { grid-template-columns: 1fr; }
  .line-button { display: flex; }
  .line-qr { display: none; }
  .footer-brand { grid-row: auto; margin-bottom: 2rem; }
  .copyright { text-align: left; }
}

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