:root {
  --paper: #f7f6f2;
  --white: #ffffff;
  --ink: #161616;
  --muted: #626262;
  --line: #d5d3cc;
  --blue: #1647ff;
  --red: #ff6a00;
  --soft-blue: #e8edff;
  --max: 1320px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans SC", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.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; left: 12px; top: -64px; z-index: 100; padding: 10px 16px; background: var(--ink); color: var(--white); transition: top .2s; }
.skip-link:focus { top: 12px; }
.page-grid { width: min(calc(100% - 64px), var(--max)); margin-inline: auto; }

.site-header {
  position: sticky; top: 0; z-index: 50; height: 88px;
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center;
  padding: 0 max(32px, calc((100vw - var(--max)) / 2));
  background: rgba(247,246,242,.92); border-bottom: 1px solid var(--ink); backdrop-filter: blur(14px);
}
.brand { display: block; width: max-content; }
.brand-lockup { display: flex; flex-direction: column; align-items: flex-start; gap: 6px; }
.brand-primary { display: inline-flex; align-items: center; }
.brand-word { font-size: 1.48rem; }
.ruxo-wordmark { display: inline-flex; align-items: center; font-family: "Syncopate", Arial, sans-serif; font-weight: 700; line-height: .82; letter-spacing: .045em; transform: scaleX(1.06); transform-origin: left center; }
.ruxo-mark-x { position: relative; align-self: center; width: .72em; height: .82em; margin: 0 .035em 0 .015em; flex: 0 0 .72em; }
.ruxo-stroke { position: absolute; left: 50%; top: 50%; width: .17em; height: 1.02em; border-radius: .025em; transform-origin: center; }
.ruxo-stroke-blue { background: var(--blue); transform: translate(-50%, -50%) rotate(-38deg); }
.ruxo-stroke-brown { background: var(--red); transform: translate(-50%, -50%) rotate(38deg); }
.brand-suffix { margin-left: 11px; font: 700 .58rem/1 "DM Mono", monospace; letter-spacing: .15em; white-space: nowrap; }
.brand-suffix-cn { font-family: "Noto Sans SC", system-ui, sans-serif; font-size: .67rem; letter-spacing: .12em; }
.brand-descriptor { font: 500 .5rem/1 "DM Mono", monospace; letter-spacing: .07em; text-transform: uppercase; white-space: nowrap; }
.main-nav { display: flex; gap: 36px; font-size: .86rem; font-weight: 600; }
.main-nav a { position: relative; }
.main-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -4px; height: 2px; background: var(--red); transition: right .2s; }
.main-nav a:hover::after, .main-nav a:focus-visible::after { right: 0; }
.header-actions { justify-self: end; display: flex; align-items: center; gap: 18px; }
.language-switch { display: flex; align-items: center; border: 1px solid var(--ink); }
.language-switch a { min-width: 34px; height: 36px; display: grid; place-items: center; border-right: 1px solid var(--ink); font: 500 .65rem "DM Mono", monospace; transition: background .2s, color .2s; }
.language-switch a:last-child { border-right: 0; min-width: 42px; }
.language-switch a:hover, .language-switch a:focus-visible, .language-switch a.active { background: var(--blue); color: var(--white); }
.header-cta { display: inline-flex; gap: 24px; align-items: center; padding: 11px 14px; background: var(--ink); color: var(--white); font-size: .8rem; font-weight: 700; }
.header-cta span { color: var(--red); }
.menu-button { display: none; background: none; border: 0; padding: 9px; }

.hero { min-height: calc(100vh - 88px); display: grid; grid-template-columns: repeat(12,1fr); column-gap: 24px; padding-top: 34px; padding-bottom: 42px; }
.hero-index { grid-column: 1 / -1; display: flex; justify-content: space-between; align-self: start; padding-bottom: 20px; border-bottom: 1px solid var(--line); color: var(--muted); font: 500 .7rem "DM Mono", monospace; letter-spacing: .08em; }
.hero-copy { grid-column: 1 / 8; align-self: center; padding: 62px 0 44px; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin: 0; font-size: clamp(3.9rem, 7vw, 7.6rem); line-height: .99; letter-spacing: -.065em; font-weight: 900; }
h1 em { color: var(--blue); font-style: normal; }
.hero-copy > p { max-width: 720px; margin: 38px 0 0 8px; font-size: 1.12rem; line-height: 1.85; }
.hero-actions { margin: 36px 0 0 8px; display: flex; align-items: center; gap: 32px; flex-wrap: wrap; }
.button { min-height: 52px; display: inline-flex; align-items: center; justify-content: space-between; gap: 44px; border: 0; padding: 0 22px; font-weight: 700; cursor: pointer; transition: transform .2s, box-shadow .2s; }
.button:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(0,0,0,.14); }
.button-dark { background: var(--ink); color: var(--white); }
.button-dark span { color: var(--red); }
.button-red { width: 100%; background: var(--red); color: var(--white); }
.text-link { padding-bottom: 4px; border-bottom: 1px solid var(--ink); font-weight: 600; }
.text-link span { margin-left: 20px; color: var(--blue); }
.hero-poster { grid-column: 9 / 13; align-self: center; min-height: 500px; position: relative; display: flex; flex-direction: column; justify-content: space-between; padding: 24px; background: var(--blue); color: var(--white); overflow: hidden; }
.poster-top { display: flex; justify-content: space-between; position: relative; z-index: 2; font: 500 .66rem "DM Mono", monospace; letter-spacing: .08em; }
.poster-center { position: relative; z-index: 2; display: grid; align-content: center; margin: auto 0; }
.poster-kicker { margin-bottom: 7px; font: 500 .72rem "DM Mono", monospace; }
.poster-center strong { font-size: clamp(4.2rem, 6vw, 6.8rem); line-height: .76; letter-spacing: -.1em; }
.poster-plus { position: absolute; right: 4px; top: 50%; font-size: 2.4rem; color: var(--red); transform: translateY(-50%); }
.poster-tech { margin-left: 38px; -webkit-text-stroke: 2px var(--white); color: transparent; }
.poster-bottom { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(2,1fr); gap: 5px 12px; font-size: .73rem; }
.poster-dot { position: absolute; width: 160px; height: 160px; right: -65px; top: 78px; border-radius: 50%; background: var(--red); }
.hero-statement { grid-column: 1 / -1; display: grid; grid-template-columns: 2fr 10fr; gap: 24px; align-items: center; padding-top: 24px; border-top: 1px solid var(--ink); }
.hero-statement span { font: .68rem "DM Mono", monospace; color: var(--muted); }
.hero-statement strong { font-size: 1.12rem; }

.ticker { overflow: hidden; background: var(--ink); color: var(--white); padding: 13px 0; white-space: nowrap; }
.ticker div { width: max-content; font: 500 .72rem "DM Mono", monospace; letter-spacing: .1em; animation: ticker 22s linear infinite; }
@keyframes ticker { to { transform: translateX(-50%); } }

.section-tag { display: block; font: 500 .7rem "DM Mono", monospace; letter-spacing: .09em; text-transform: uppercase; }
.manifesto { display: grid; grid-template-columns: 2.3fr .7fr; min-height: 680px; }
.manifesto-main { padding: 86px max(32px, calc((100vw - var(--max)) / 2)); padding-right: 70px; background: var(--blue); color: var(--white); display: flex; flex-direction: column; justify-content: space-between; }
.manifesto-main h2 { max-width: 1120px; font-size: clamp(3.2rem, 5.6vw, 6.2rem); line-height: 1.08; letter-spacing: -.055em; margin: 80px 0 0; }
.manifesto-main em { color: #dce4ff; font-style: normal; }
.manifesto-note { padding: 88px 34px 46px; background: var(--red); color: var(--white); display: flex; flex-direction: column; justify-content: space-between; }
.manifesto-note > span { font: .68rem "DM Mono", monospace; }
.manifesto-note p { margin: 0; font-size: 1.35rem; line-height: 1.55; font-weight: 600; }

.difference { display: grid; grid-template-columns: repeat(12,1fr); column-gap: 24px; padding-top: 140px; padding-bottom: 140px; }
.section-title { grid-column: 1 / 6; }
.section-title h2, .services-head h2, .method-title h2, .work-head h2, .fit-title h2, .contact-copy h2 { margin: 22px 0 0; font-size: clamp(3rem, 5vw, 5.3rem); line-height: 1.1; letter-spacing: -.055em; }
.method-title h2 { font-size: clamp(2.9rem, 4.5vw, 4.8rem); line-height: 1.12; }
.difference-copy { grid-column: 7 / 13; padding-top: 42px; }
.difference-copy .lead { font-size: 1.08rem; }
.difference-copy blockquote { margin: 32px 0; padding: 22px 0 22px 28px; border-left: 6px solid var(--red); font-size: clamp(1.75rem, 3vw, 3rem); line-height: 1.35; font-weight: 800; letter-spacing: -.04em; }
.difference-copy > p:last-child { color: var(--muted); }
.difference-path { grid-column: 1 / -1; margin-top: 90px; display: grid; grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr; align-items: center; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.difference-path div { min-height: 150px; display: flex; flex-direction: column; justify-content: center; }
.difference-path span { color: var(--blue); font: 500 .7rem "DM Mono", monospace; }
.difference-path b { font-size: 1.1rem; margin: 10px 0 2px; }
.difference-path small { color: var(--muted); font: .66rem "DM Mono", monospace; }
.difference-path i { color: var(--red); font-style: normal; font-size: 1.5rem; }

.services { padding-top: 130px; background: var(--white); border-top: 1px solid var(--ink); }
.services-head { display: grid; grid-template-columns: repeat(12,1fr); gap: 24px; padding-bottom: 80px; }
.services-head .section-tag { grid-column: 1 / 4; }
.services-head h2 { grid-column: 4 / 9; margin-top: 0; }
.services-head > p { grid-column: 10 / 13; color: var(--muted); align-self: end; margin: 0; }
.service-list { border-top: 1px solid var(--ink); }
.service-item { display: grid; grid-template-columns: minmax(60px, .5fr) 1.7fr 2fr 1.5fr; gap: 28px; padding: 46px max(32px, calc((100vw - var(--max)) / 2)); border-bottom: 1px solid var(--ink); transition: background .25s, color .25s; }
.service-item:hover { background: var(--soft-blue); }
.service-number { color: var(--blue); font: 500 .75rem "DM Mono", monospace; }
.service-name > span { color: var(--red); font: 500 .66rem "DM Mono", monospace; }
.service-name h3 { margin: 10px 0 0; font-size: 1.7rem; line-height: 1.3; letter-spacing: -.035em; }
.service-item > p { margin: 0; color: var(--muted); }
.service-item ul { list-style: none; padding: 0; margin: 0; font-size: .82rem; display: grid; gap: 8px; }
.service-item li::before { content: "＋"; color: var(--blue); margin-right: 7px; }

.method { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; padding-top: 150px; padding-bottom: 150px; }
.method-title { position: sticky; top: 130px; align-self: start; }
.method-list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--ink); }
.method-list li { display: grid; grid-template-columns: 65px 1fr; gap: 22px; padding: 30px 0 34px; border-bottom: 1px solid var(--ink); }
.method-list li > b { color: var(--blue); font: .75rem "DM Mono", monospace; padding-top: 7px; }
.method-list span { color: var(--red); font: .65rem "DM Mono", monospace; }
.method-list h3 { margin: 5px 0 7px; font-size: 1.45rem; }
.method-list p { margin: 0; color: var(--muted); }

.work { padding-top: 135px; padding-bottom: 140px; background: var(--soft-blue); }
.work-head { display: grid; grid-template-columns: repeat(12,1fr); gap: 24px; padding-bottom: 80px; }
.work-head .section-tag { grid-column: 1 / 4; }
.work-head h2 { grid-column: 4 / 13; margin-top: 0; }
.work-head em { color: var(--blue); font-style: normal; }
.case-study { background: var(--white); border: 1px solid var(--ink); }
.case-meta { min-height: 62px; padding: 0 24px; display: grid; grid-template-columns: 1fr 2fr 1fr; align-items: center; border-bottom: 1px solid var(--ink); font: .65rem "DM Mono", monospace; }
.case-meta span:nth-child(2) { text-align: center; }
.case-meta span:last-child { text-align: right; }
.case-problem, .case-idea { display: grid; grid-template-columns: 1fr 3fr; padding: 50px 24px; border-bottom: 1px solid var(--ink); }
.case-problem > span, .case-idea > span { font: .65rem "DM Mono", monospace; color: var(--red); }
.case-problem p { max-width: 850px; margin: 0; font-size: 1.15rem; }
.case-idea { background: var(--blue); color: var(--white); }
.case-idea h3 { margin: 0; font-size: clamp(2.2rem, 4vw, 4.2rem); line-height: 1.15; letter-spacing: -.055em; }
.case-system { display: grid; grid-template-columns: repeat(5,1fr); border-bottom: 1px solid var(--ink); }
.case-system div { min-height: 170px; padding: 22px; border-right: 1px solid var(--ink); display: flex; flex-direction: column; justify-content: flex-end; }
.case-system div:last-child { border-right: 0; }
.case-system b { color: var(--blue); font: .72rem "DM Mono", monospace; margin-bottom: auto; }
.case-system span { font-weight: 700; }
.case-system small { color: var(--muted); margin-top: 4px; }
.case-result { display: grid; grid-template-columns: repeat(3,1fr) 1.25fr; align-items: stretch; }
.case-result div { min-height: 150px; display: flex; flex-direction: column; justify-content: center; align-items: center; border-right: 1px solid var(--ink); }
.case-result strong { font-size: 2.7rem; line-height: 1; letter-spacing: -.06em; }
.case-result span { color: var(--muted); font-size: .76rem; }
.case-result a { display: grid; place-items: center; background: var(--red); color: var(--white); font-weight: 700; }

.fit { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; padding-top: 150px; padding-bottom: 150px; }
.fit-list { border-top: 1px solid var(--ink); }
.fit-list > div { display: grid; grid-template-columns: 58px 1.1fr 1fr; gap: 18px; padding: 28px 0; border-bottom: 1px solid var(--ink); }
.fit-list span { color: var(--blue); font: .72rem "DM Mono", monospace; padding-top: 7px; }
.fit-list h3 { margin: 0; font-size: 1.2rem; }
.fit-list p { margin: 0; color: var(--muted); }

.contact { background: var(--blue); color: var(--white); }
.contact-inner { display: grid; grid-template-columns: 1.2fr .8fr; gap: 110px; padding-top: 130px; padding-bottom: 130px; }
.contact-copy .section-tag { color: #cdd8ff; }
.contact-card { background: var(--white); color: var(--ink); padding: 36px; align-self: end; }
.contact-email { position: relative; display: grid; gap: 5px; margin: -8px 0 30px; padding: 0 42px 25px 0; border-bottom: 1px solid var(--ink); }
.contact-email span { color: var(--red); font: 500 .65rem "DM Mono", monospace; letter-spacing: .08em; }
.contact-email strong { font-size: clamp(1.3rem, 2vw, 1.8rem); line-height: 1.25; letter-spacing: -.035em; overflow-wrap: anywhere; }
.contact-email i { position: absolute; right: 0; bottom: 24px; color: var(--blue); font-style: normal; font-size: 1.3rem; }
.contact-card > p:first-child { font-weight: 700; }
.contact-card ul { list-style: none; padding: 20px 0; margin: 24px 0 30px; border-block: 1px solid var(--line); display: grid; gap: 11px; }
.contact-card li::before { content: "→"; color: var(--red); margin-right: 10px; }
.copy-note { margin: 13px 0 0; color: var(--muted); font-size: .76rem; text-align: center; }

.site-footer { min-height: 130px; display: grid; grid-template-columns: 1fr 1fr 1fr; align-items: center; }
.footer-brand .ruxo-wordmark { font-size: 1.65rem; }
.site-footer > p { margin: 0; text-align: center; font: .67rem "DM Mono", monospace; }
.site-footer > div:last-child { display: flex; justify-content: flex-end; gap: 26px; font-size: .78rem; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .75s ease, transform .75s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 1000px) {
  .site-header { grid-template-columns: 1fr auto auto; }
  .header-cta { display: none; }
  .header-actions { margin-left: auto; }
  .menu-button { display: grid; gap: 6px; }
  .menu-button span:not(.sr-only) { width: 25px; height: 2px; background: var(--ink); }
  .main-nav { position: absolute; left: 0; right: 0; top: 88px; display: none; flex-direction: column; gap: 0; padding: 16px 32px 26px; background: var(--paper); border-bottom: 1px solid var(--ink); }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 0; }
  .hero-copy { grid-column: 1 / 9; }
  .hero-poster { grid-column: 9 / 13; min-height: 430px; }
  .poster-center strong { font-size: 4rem; }
  .manifesto { grid-template-columns: 1fr; }
  .manifesto-note { min-height: 300px; }
  .service-item { grid-template-columns: 55px 1.2fr 1.5fr; }
  .service-item ul { grid-column: 2 / -1; padding-top: 10px; grid-template-columns: repeat(3,1fr); }
  .method, .fit, .contact-inner { grid-template-columns: 1fr; gap: 60px; }
  .method-title { position: static; }
  .fit-list > div { grid-template-columns: 55px 1fr 1fr; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .page-grid { width: min(calc(100% - 32px), var(--max)); }
  .site-header { height: 72px; padding: 0 16px; }
  .language-switch a { min-width: 31px; height: 32px; }
  .language-switch a:last-child { min-width: 38px; }
  .brand-descriptor { display: none; }
  .main-nav { top: 72px; padding-inline: 16px; }
  .hero { display: block; min-height: auto; padding: 20px 0 28px; }
  .hero-index { margin-bottom: 52px; }
  .hero-copy { padding: 0 0 55px; }
  h1 { font-size: clamp(3.6rem, 18vw, 5.4rem); line-height: 1.02; }
  .hero-copy > p, .hero-actions { margin-left: 0; }
  .hero-poster { min-height: 450px; margin-bottom: 28px; }
  .poster-center strong { font-size: 5.2rem; }
  .hero-statement { grid-template-columns: 1fr; gap: 8px; padding-top: 20px; }
  .manifesto-main { min-height: 580px; padding: 65px 16px; }
  .manifesto-main h2 { font-size: clamp(2.9rem, 13vw, 4.6rem); line-height: 1.1; }
  .manifesto-note { padding: 50px 22px; }
  .difference, .method, .fit { display: block; padding-top: 90px; padding-bottom: 90px; }
  .difference-copy { padding-top: 55px; }
  .difference-path { grid-template-columns: 1fr; margin-top: 60px; }
  .difference-path div { min-height: 105px; border-bottom: 1px solid var(--line); }
  .difference-path i { display: none; }
  .services { padding-top: 90px; }
  .services-head { display: block; padding-bottom: 55px; }
  .services-head h2 { margin-top: 18px; }
  .services-head > p { margin-top: 28px; }
  .service-item { grid-template-columns: 40px 1fr; gap: 14px; padding: 32px 16px; }
  .service-item > p, .service-item ul { grid-column: 2; }
  .service-item ul { grid-template-columns: 1fr; }
  .method-title, .fit-title { margin-bottom: 55px; }
  .work { padding-top: 90px; padding-bottom: 90px; }
  .work-head { display: block; padding-bottom: 50px; }
  .work-head h2 { margin-top: 18px; }
  .case-meta { grid-template-columns: 1fr; gap: 6px; padding: 18px; }
  .case-meta span:nth-child(2), .case-meta span:last-child { text-align: left; }
  .case-problem, .case-idea { grid-template-columns: 1fr; gap: 24px; padding: 34px 20px; }
  .case-system { grid-template-columns: 1fr; }
  .case-system div { min-height: 120px; border-right: 0; border-bottom: 1px solid var(--ink); }
  .case-system div:last-child { border-bottom: 0; }
  .case-result { grid-template-columns: repeat(3,1fr); }
  .case-result div { min-height: 110px; }
  .case-result a { grid-column: 1 / -1; min-height: 80px; }
  .fit-list > div { grid-template-columns: 40px 1fr; gap: 12px; }
  .fit-list p { grid-column: 2; }
  .contact-inner { padding-top: 90px; padding-bottom: 90px; }
  .contact-card { padding: 28px 20px; }
  .site-footer { grid-template-columns: 1fr; gap: 14px; padding: 34px 0; }
  .site-footer > p { text-align: left; }
  .site-footer > div:last-child { justify-content: flex-start; flex-wrap: wrap; }
}

@media (max-width: 390px) {
  .brand-word { font-size: 1.16rem; }
  .brand-suffix { margin-left: 7px; font-size: .48rem; }
  .brand-suffix-cn { font-size: .56rem; }
  .language-switch a { min-width: 27px; }
  .language-switch a:last-child { min-width: 34px; }
  .menu-button { padding-inline: 7px; }
}

html[lang^="ja"] body { font-family: "Noto Sans JP", system-ui, sans-serif; }
html[lang^="en"] body { font-family: Arial, Helvetica, sans-serif; }
html[lang^="en"] h1,
html[lang^="en"] .manifesto-main h2,
html[lang^="en"] .section-title h2,
html[lang^="en"] .services-head h2,
html[lang^="en"] .method-title h2,
html[lang^="en"] .work-head h2,
html[lang^="en"] .fit-title h2,
html[lang^="en"] .contact-copy h2 { letter-spacing: -.065em; }

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