:root {
  --ink: #050505;
  --white: #ffffff;
  --mist: #f7f8fa;
  --silver: #dfe3e7;
  --muted: #60686e;
  --accent: #0068ff;
  --accent-deep: #003da5;
  --pad: clamp(1.3rem, 4.2vw, 5rem);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--ink); }
body { margin: 0; color: var(--ink); background: var(--white); font-family: Helvetica, "Helvetica Neue", Arial, sans-serif; font-size: 16px; line-height: 1.5; text-rendering: optimizeLegibility; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
::selection { color: white; background: var(--accent); }
.skip { position: fixed; top: -5rem; left: 1rem; z-index: 100; padding: .8rem 1rem; color: white; background: black; }
.skip:focus { top: 1rem; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }

.topbar { position: fixed; inset: 0 0 auto; z-index: 50; display: flex; align-items: center; justify-content: space-between; min-height: 4.8rem; padding: 0 var(--pad); border-bottom: 1px solid rgba(7,10,13,.14); background: rgba(255,255,255,.78); backdrop-filter: blur(18px); }
.brand { display: flex; align-items: baseline; gap: .38rem; color: #000; line-height: 1; }
.brand-main { font-size: 1.35rem; font-weight: 800; letter-spacing: -.075em; }
.brand-sub { font-size: .84rem; font-weight: 600; letter-spacing: -.035em; }
.brand-period { color: var(--accent); }
.nav { display: flex; gap: clamp(1.3rem, 3vw, 3.4rem); align-items: center; font-size: .72rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.nav a { padding: .5rem 0; }
.nav-cta { border-bottom: 1px solid var(--ink); }

.hero { min-height: 100svh; display: grid; grid-template-columns: .84fr 1.16fr; padding-top: 4.8rem; background: var(--mist); }
.hero-copy { display: flex; flex-direction: column; justify-content: space-between; padding: clamp(3rem, 7vw, 7rem) var(--pad) 2.2rem; }
.kicker { margin: 0; color: var(--muted); font-size: .72rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.hero h1 { margin: 2.5rem 0; max-width: 7ch; font-size: clamp(4rem, 8.4vw, 8.5rem); font-weight: 400; line-height: .88; letter-spacing: -.075em; }
.hero h1 span { color: var(--accent); }
.hero-lede { max-width: 31rem; margin: 0; color: #3e484d; font-size: clamp(1rem, 1.3vw, 1.25rem); }
.hero-foot { display: flex; justify-content: space-between; align-items: end; gap: 1.5rem; padding-top: 3rem; }
.text-link { display: inline-flex; align-items: center; gap: 1rem; font-size: .72rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.text-link::before { content: ""; width: 2.5rem; height: 1px; background: currentColor; transition: width .25s; }
.text-link:hover::before { width: 4rem; }
.hero-index { color: #899397; font: 600 .7rem/1.2 monospace; letter-spacing: .08em; text-align: right; }

.hero-image { position: relative; min-height: calc(100svh - 4.8rem); overflow: hidden; background: #e4eaec; }
.hero-image img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: center; transform: scale(1.005); }
.hero-image::after { content: ""; position: absolute; inset: 0; box-shadow: inset 0 0 0 1px rgba(7,10,13,.06); pointer-events: none; }
.image-note { position: absolute; right: 1.5rem; bottom: 1.5rem; display: flex; align-items: center; gap: .65rem; padding: .7rem .9rem; background: rgba(255,255,255,.86); backdrop-filter: blur(12px); color: var(--ink); font: 600 .66rem/1 monospace; letter-spacing: .1em; text-transform: uppercase; }
.image-note i { width: .42rem; aspect-ratio: 1; background: var(--accent); border-radius: 50%; }

.statement { padding: clamp(7rem, 13vw, 14rem) var(--pad); background: white; }
.statement-grid { display: grid; grid-template-columns: .45fr 1.55fr; gap: 3rem; }
.section-label { margin: .55rem 0 0; color: var(--muted); font-size: .7rem; font-weight: 700; letter-spacing: .15em; text-transform: uppercase; }
.statement h2 { margin: 0; max-width: 13ch; font-size: clamp(3.1rem, 7vw, 7rem); font-weight: 400; line-height: .96; letter-spacing: -.065em; }
.statement h2 em { font-style: normal; color: #aeb7bb; }
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: clamp(4rem, 9vw, 8rem); background: var(--silver); border: 1px solid var(--silver); }
.principle { min-height: 18rem; padding: 1.6rem; background: white; transition: background .35s, color .35s; }
.principle:hover { color: white; background: var(--ink); }
.principle small { color: var(--accent); font: 700 .68rem/1 monospace; letter-spacing: .12em; }
.principle h3 { margin: 7rem 0 .7rem; font-size: 1.4rem; font-weight: 500; letter-spacing: -.03em; }
.principle p { margin: 0; color: var(--muted); font-size: .92rem; }
.principle:hover p { color: #aeb8bd; }

.experience { display: grid; grid-template-columns: 1.1fr .9fr; min-height: 90svh; color: white; background: var(--ink); }
.experience-image { position: relative; overflow: hidden; }
.experience-image img { width: 100%; height: 100%; display: block; object-fit: cover; object-position: center; filter: saturate(.66) contrast(1.04); }
.experience-image::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, transparent 55%, var(--ink)); }
.experience-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(4rem, 8vw, 9rem) var(--pad); }
.experience h2 { margin: 2rem 0; max-width: 8ch; font-size: clamp(3.3rem, 6.7vw, 7.3rem); font-weight: 400; line-height: .9; letter-spacing: -.065em; }
.experience p { max-width: 29rem; margin: 0; color: #aab3b7; font-size: 1.05rem; }
.mode-switch { display: flex; gap: .35rem; margin-top: 3.2rem; }
.mode { flex: 1; padding: .95rem 1rem; border: 1px solid #353b3e; color: #909a9f; background: transparent; cursor: pointer; font-size: .7rem; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; transition: .25s; }
.mode[aria-selected="true"] { color: var(--ink); border-color: white; background: white; }
.mode-detail { min-height: 7.5rem; margin-top: 1.5rem; padding-top: 1.5rem; border-top: 1px solid #353b3e; }
.mode-detail strong { display: block; margin-bottom: .5rem; color: white; font-size: 1.15rem; }

.architecture { padding: clamp(6rem, 11vw, 11rem) var(--pad); background: var(--mist); }
.architecture-head { display: flex; justify-content: space-between; align-items: end; gap: 2rem; margin-bottom: 4rem; }
.architecture h2 { margin: 0; max-width: 11ch; font-size: clamp(3rem, 6.3vw, 6.5rem); font-weight: 400; line-height: .95; letter-spacing: -.06em; }
.architecture-head p { max-width: 24rem; margin: 0; color: var(--muted); }
.layers { border-top: 1px solid #bdc5c8; }
.layer { display: grid; grid-template-columns: 5rem .8fr 1.2fr; gap: 2rem; align-items: start; padding: 2rem 0; border-bottom: 1px solid #bdc5c8; }
.layer-num { color: var(--accent); font: 700 .7rem/1.5 monospace; }
.layer h3 { margin: 0; font-size: clamp(1.6rem, 3vw, 2.8rem); font-weight: 400; letter-spacing: -.04em; }
.layer p { max-width: 34rem; margin: .25rem 0 0; color: var(--muted); }

.contact { min-height: 78svh; display: flex; flex-direction: column; justify-content: space-between; padding: clamp(6rem, 11vw, 10rem) var(--pad) 2rem; color: white; background: linear-gradient(135deg, var(--accent) 0%, #0053d7 48%, var(--accent-deep) 100%); }
.contact h2 { margin: 1.5rem 0 2.7rem; max-width: 9ch; font-size: clamp(4rem, 9.8vw, 10rem); font-weight: 400; line-height: .84; letter-spacing: -.075em; }
.contact-link { display: inline-flex; align-items: center; gap: 1rem; padding: 1.05rem 1.2rem; color: var(--ink); background: white; font-size: .72rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.contact-link b { font-size: 1.2rem; font-weight: 400; }
footer { display: flex; justify-content: space-between; gap: 2rem; margin-top: 6rem; padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,.35); font-size: .68rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }

.reveal { opacity: 0; transform: translateY(1.8rem); transition: opacity .75s ease, transform .75s cubic-bezier(.22,1,.36,1); }
.reveal.visible { opacity: 1; transform: none; }
@media (max-width: 840px) {
  .nav a:not(.nav-cta) { display: none; }
  .hero { grid-template-columns: 1fr; }
  .hero-copy { min-height: 65svh; }
  .hero-image { min-height: 72svh; }
  .statement-grid, .experience { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; }
  .principle { min-height: 14rem; }
  .principle h3 { margin-top: 4rem; }
  .experience-image { min-height: 70svh; }
  .experience-image::after { background: linear-gradient(0deg, var(--ink), transparent 38%); }
  .architecture-head { display: grid; }
  .layer { grid-template-columns: 3rem 1fr; }
  .layer p { grid-column: 2; }
  footer { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .001ms !important; animation-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* Japanese edition: shared palette and original photography. */
body { font-family: Helvetica, "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif; line-height: 1.9; overflow-wrap: break-word; }
h1, h2, h3, h4, p { overflow-wrap: anywhere; }
section[id], main[id] { scroll-margin-top: 6rem; }
.topbar { gap: 2rem; }
.brand { flex-shrink: 0; }
.nav { margin-left: auto; gap: clamp(1rem, 2.1vw, 2.4rem); }
.language { font-size: .68rem; font-weight: 700; letter-spacing: .12em; padding-left: 1.2rem; border-left: 1px solid var(--silver); }
.hero { grid-template-columns: 1fr 1fr; min-height: min(920px, 100svh); }
.hero-copy { padding-top: clamp(4rem, 7vw, 7rem); }
.hero h1 { max-width: none; font-size: clamp(3.2rem, 5.7vw, 6.8rem); line-height: .98; margin: 2rem 0; letter-spacing: -.065em; }
.hero-subtitle { font-size: clamp(1rem, 1.4vw, 1.35rem); font-weight: 600; line-height: 1.7; margin: 0 0 1.2rem; letter-spacing: .015em; }
.hero-lede { font-size: .95rem; line-height: 2; }
.hero-image { min-height: 46rem; }
.hero-image img { position: absolute; inset: 0; }
.hero-foot { flex-wrap: wrap; }
.hero-index { line-height: 1.6; }
.section-pad { padding: clamp(5rem, 9vw, 9rem) var(--pad); }
.section-shell, .section-heading { display: grid; grid-template-columns: .45fr 1.55fr; gap: 3rem; }
.section-heading > *, .section-shell > *, .layer > *, .editorial-block > *, .robot-feature > *, .contact-grid > * { min-width: 0; }
.intro { padding: 5rem var(--pad); border-bottom: 1px solid var(--silver); }
.prose { max-width: 48rem; color: #4b545a; font-size: 1rem; line-height: 2.05; }
.prose p { margin: 0 0 1.25rem; }
.prose p:last-child { margin-bottom: 0; }
.intro-lead { color: var(--ink); font-size: clamp(1.35rem, 2.4vw, 2.3rem); font-weight: 500; line-height: 1.7; }
.display { font-size: clamp(2.8rem, 5.7vw, 6.2rem); font-weight: 400; line-height: 1.03; letter-spacing: -.06em; margin: 0; }
.display span { color: var(--accent); }
.subtitle { font-size: clamp(1.1rem, 1.7vw, 1.55rem); font-weight: 500; line-height: 1.8; margin: 2rem 0 0; }
.section-body { margin: 2.8rem 0 0 calc((100% - 3rem) * .225 + 3rem); }
.architecture-block { margin-top: 5rem; }
.eyebrow { font-size: .74rem; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; margin: 0 0 1.5rem; }
.layer { grid-template-columns: 3rem 1fr 1.2fr; gap: 2rem; padding: 2rem 0; }
.layer h4 { margin: 0; font-size: clamp(1.3rem, 2.6vw, 2.2rem); font-weight: 400; letter-spacing: -.035em; line-height: 1.2; }
.layer h4 small { display: block; font-size: .8rem; letter-spacing: .025em; margin-top: .8rem; color: var(--muted); }
.layer p { font-size: .95rem; line-height: 1.9; }
.platform-close { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; margin-top: 4rem; align-items: center; }
.platform-close h3 { margin: 0; color: var(--accent); font-size: clamp(2rem, 4vw, 4rem); line-height: 1.05; font-weight: 400; letter-spacing: -.05em; }
.robotics { background: var(--ink); color: white; }
.robotics .section-label { color: #aab4bc; }
.robotics .prose { color: #b8c0c5; }
.robot-feature { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid #303538; }
.robot-photo { position: relative; margin: 0; align-self: start; }
.robot-photo img { display: block; width: 100%; height: auto; }
.robot-photo figcaption { position: absolute; left: 1.5rem; bottom: 1.5rem; background: rgba(5,5,5,.75); padding: .5rem .8rem; font: .65rem/1.5 monospace; letter-spacing: .06em; }
.robot-copy { padding: clamp(2rem, 5vw, 5rem) var(--pad); }
.robot-copy h3 { margin: 1.5rem 0 2rem; font-size: clamp(2.3rem, 4.2vw, 4.5rem); font-weight: 400; line-height: 1.02; letter-spacing: -.05em; }
.robot-copy h4 { margin: 0 0 1.5rem; font-size: 1.15rem; font-weight: 500; line-height: 1.8; }
.robot-copy .prose { font-size: .94rem; }
.feature-label { margin: 2.5rem 0 .75rem; font-size: .75rem; font-weight: 500; color: #b8c0c5; }
.feature-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid #353b3e; }
.feature-list li { display: flex; justify-content: space-between; gap: 1rem; padding: .7rem 0; border-bottom: 1px solid #353b3e; font-size: .8rem; }
.feature-list li span:last-child { color: #b8c0c5; text-align: right; }
.robot-note { margin: 1.5rem 0 0; font-size: .85rem; color: #b8c0c5; }
.robot-motto { font-size: clamp(1.2rem, 2vw, 1.8rem); letter-spacing: -.03em; margin: 2rem 0 0; }
.companion .robot-photo { grid-column: 2; grid-row: 1; }
.companion .robot-copy { grid-column: 1; grid-row: 1; }
.signalx { background: var(--mist); }
.editorial-block { display: grid; grid-template-columns: 1fr 1.4fr; gap: 4rem; padding-top: 3rem; margin-top: 4rem; border-top: 1px solid #cdd3d8; }
.editorial-block h3 { font-size: clamp(1.8rem, 3.2vw, 3rem); font-weight: 400; letter-spacing: -.04em; line-height: 1.1; margin: 0; }
.engine { margin-top: 5rem; }
.engine-steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid #bdc5c8; border-bottom: 1px solid #bdc5c8; }
.engine-steps li { padding: 1.6rem 1.5rem 2rem; border-right: 1px solid #bdc5c8; }
.engine-steps li:first-child { padding-left: 0; }
.engine-steps li:last-child { border-right: 0; }
.engine-steps h4 { font-size: clamp(1.2rem, 2.2vw, 2rem); margin: 2rem 0 .5rem; font-weight: 400; letter-spacing: -.04em; line-height: 1.2; }
.engine-steps p { margin: .8rem 0 0; font-size: .86rem; color: var(--muted); }
.engine-steps .step-label { color: var(--ink); font-weight: 500; }
.emphasis { color: var(--ink); font-size: 1.35rem; padding-top: 1rem; }
.vision { background: #eceff2; }
.vision-belief { border-left: 2px solid var(--accent); padding-left: 1.5rem; margin: 2.5rem 0; color: var(--ink); font-size: 1.1rem; }
.vision-motto { font-size: clamp(2.4rem, 4.5vw, 4.5rem); line-height: 1.05; letter-spacing: -.05em; color: var(--accent); padding-top: 2rem; padding-bottom: 1rem; }
.contact { min-height: auto; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.contact h2 { font-size: clamp(4rem, 8vw, 8rem); max-width: none; line-height: .92; }
.contact .kicker { color: #e0eaff; }
.contact .prose { color: white; }
.disclaimer { margin: 5rem 0 0; max-width: 65rem; color: #e0eaff; font-size: .78rem; line-height: 1.9; }
footer { margin-top: 2.5rem; font-size: .65rem; align-items: baseline; }
.reveal { opacity: 1; transform: none; }
.will-reveal { opacity: 0; transform: translateY(1.5rem); transition: opacity .7s ease, transform .7s ease; }
.will-reveal.visible { opacity: 1; transform: none; }
@media (min-width: 1600px) { .section-pad, .intro { padding-left: max(var(--pad), calc((100vw - 1440px) / 2)); padding-right: max(var(--pad), calc((100vw - 1440px) / 2)); } }
@media (max-width: 1000px) {
  .topbar { gap: 1rem; }
  .hero-index { display: none; }
  .section-shell, .section-heading { grid-template-columns: 1fr; gap: 1.8rem; }
  .section-body { margin-left: 0; }
  .robot-copy { padding: 2.5rem 1.6rem; }
  .feature-list li { flex-direction: column; gap: .1rem; }
  .feature-list li span:last-child { text-align: left; }
}
@media (max-width: 700px) {
  .topbar { min-height: 4.5rem; }
  .nav a:not(.nav-cta) { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 4.5rem; }
  .hero-copy { padding-top: 3rem; }
  .hero h1 { font-size: clamp(3.2rem, 11vw, 4.8rem); }
  .hero-image { min-height: 0; aspect-ratio: 1; }
  .hero-foot { padding-top: 2rem; }
  .hero-index { display: block; }
  .display { font-size: clamp(2.4rem, 8.2vw, 3.5rem); }
  .intro { padding-top: 3.5rem; padding-bottom: 3.5rem; }
  .prose { font-size: .94rem; }
  .layer { grid-template-columns: 1.7rem 1fr; gap: .75rem 1rem; }
  .layer p { grid-column: 2; }
  .platform-close, .editorial-block, .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
  .robot-feature { grid-template-columns: 1fr; }
  .companion .robot-photo, .companion .robot-copy { grid-column: auto; grid-row: auto; }
  .robot-copy { padding: 3rem var(--pad) 4rem; }
  .robot-copy h3 { font-size: 3rem; }
  .feature-list li { flex-direction: row; }
  .feature-list li span:last-child { text-align: right; }
  .engine-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .engine-steps li { padding: 1.3rem 1rem; }
  .engine-steps li:nth-child(2) { border-right: 0; }
  .engine-steps li:nth-child(n+3) { border-top: 1px solid #bdc5c8; }
  .engine-steps li:nth-child(3) { padding-left: 0; }
  .engine-steps h4 { font-size: 1.35rem; }
  .contact { padding-top: 5rem; }
  .contact-grid { gap: 3rem; }
  footer { flex-direction: column; gap: 1rem; }
}
@media (prefers-reduced-motion: reduce) { .will-reveal { opacity: 1; transform: none; } }

/* Shared language navigation; plain links also work when opened as local files. */
.language { display: flex; align-items: center; gap: .45rem; flex-shrink: 0; }
.language a { display: inline-flex; align-items: center; justify-content: center; min-width: 1.8rem; min-height: 2.75rem; color: var(--muted); }
.language a[aria-current="page"] { color: var(--accent); text-decoration: underline; text-underline-offset: .4rem; }
.language a:hover { color: var(--accent); }
.language-divider { color: #bdc5c8; }
html[lang="en"] .prose { line-height: 1.85; }
html[lang="en"] .feature-list li span:only-child { color: inherit; text-align: left; }
@media (max-width: 700px) {
  .topbar { gap: .65rem; }
  .language { padding-left: .55rem; gap: .15rem; }
  .nav { font-size: .65rem; }
}