:root {
  color-scheme: dark;
  --color-bg: #070d18;
  --color-surface: #101d2e;
  --color-accent: #00c8f8;
  --color-text: #f2f6fc;
  --color-muted: #95a7bb;
  --color-border: #25364a;
  --header-height: 88px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", Meiryo, "Noto Sans CJK JP", "IPAGothic", sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 24px); }
body { margin: 0; background: var(--color-bg); color: var(--color-text); font-family: var(--font); font-size: 16px; line-height: 1.8; -webkit-font-smoothing: antialiased; }
h1, h2, h3, p, ul, dl, dd { margin: 0; }
ul { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
img, svg { display: block; flex-shrink: 0; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 6px; }
section:focus, main:focus { outline: none; }
section:focus-visible { outline: 2px solid var(--color-accent); outline-offset: -3px; }
.container { width: min(1200px, calc(100% - 80px)); margin-inline: auto; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 100; padding: 10px 20px; background: var(--color-text); color: var(--color-bg); transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }
.site-header { position: sticky; top: 0; z-index: 20; background: var(--color-bg); border-bottom: 1px solid var(--color-border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: var(--header-height); gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 14px; min-height: 44px; flex-shrink: 0; }
.brand-type { display: grid; gap: 1px; }
.brand-name { font-size: 16px; font-weight: 600; letter-spacing: .06em; }
.brand-english { color: var(--color-muted); font-size: 10px; font-weight: 500; letter-spacing: .15em; }
.primary-nav { display: flex; align-items: center; gap: 32px; }
.primary-nav a { display: flex; align-items: center; min-height: 44px; font-size: 14px; letter-spacing: .04em; }
.primary-nav a:hover { color: var(--color-accent); }
.menu-toggle { display: flex; align-items: center; gap: 12px; padding: 8px; min-height: 44px; border: 1px solid var(--color-border); background: transparent; cursor: pointer; font-size: 14px; }
.menu-icon { position: relative; width: 18px; height: 12px; border-block: 1px solid currentColor; }
.menu-icon::after { content: ""; position: absolute; left: 0; right: 0; top: 5px; border-top: 1px solid currentColor; }
.menu-toggle[aria-expanded="true"] .menu-icon { border: 0; }
.menu-toggle[aria-expanded="true"] .menu-icon::before,
.menu-toggle[aria-expanded="true"] .menu-icon::after { content: ""; position: absolute; inset: 5px 0 auto; border-top: 1px solid currentColor; transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-icon::after { transform: rotate(-45deg); }

.hero { position: relative; isolation: isolate; overflow: hidden; background: radial-gradient(ellipse at 85% 75%, #0a2538 0%, #081320 32%, var(--color-bg) 66%); }
.hero-inner { position: relative; padding-top: 100px; padding-bottom: 32px; }
.eyebrow { color: var(--color-accent); font-size: 12px; letter-spacing: .16em; font-weight: 500; }
.eyebrow-cross { margin-inline: 7px; }
h1 { margin-top: 30px; font-size: clamp(56px, 5vw, 72px); line-height: 1.36; font-weight: 600; letter-spacing: .025em; }
h1 span { display: block; }
.hero-english { margin-top: 20px; color: #b1cadb; font-size: clamp(20px, 2vw, 26px); letter-spacing: .03em; font-weight: 400; font-style: italic; }
.hero-description { margin-top: 35px; font-size: 18px; line-height: 1.9; letter-spacing: .035em; }
.hero-description span { display: block; }
.hero-foot { margin-top: 88px; display: flex; align-items: center; gap: 22px; color: var(--color-muted); font-size: 10px; letter-spacing: .17em; }
.hero-rule { height: 1px; flex: 1; background: var(--color-border); }
.scroll-line { height: 28px; width: 1px; background: var(--color-accent); }
.hero-art { pointer-events: none; z-index: -1; position: absolute; width: 850px; height: 630px; right: -170px; top: 5px; transform: rotate(-32deg); }
.orbit { position: absolute; border: 1px solid #20718c; border-radius: 50%; }
.orbit-one { inset: 100px -40px; opacity: .55; }
.orbit-two { inset: 165px -90px; border-color: #5fbad1; opacity: .65; }
.orbit-three { inset: 225px -150px; opacity: .35; }
.orbit-point { position: absolute; left: 67px; top: 254px; width: 6px; height: 6px; border-radius: 50%; background: #cef5ff; box-shadow: 0 0 20px 4px #00c8f830; }

.section { padding-block: 88px; border-top: 1px solid var(--color-border); }
.section-label { display: flex; align-items: baseline; gap: 18px; margin-bottom: 40px; }
.section-number { color: var(--color-accent); font-size: 12px; font-variant-numeric: tabular-nums; letter-spacing: .06em; }
.section-label h2 { display: flex; align-items: baseline; flex-wrap: wrap; gap: 18px; font-size: 24px; line-height: 1.5; font-weight: 500; letter-spacing: .08em; }
.section-label h2 span { color: var(--color-muted); font-size: 12px; font-weight: 400; letter-spacing: .1em; }
.philosophy-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.philosophy-statement { font-size: clamp(26px, 2.5vw, 34px); line-height: 1.8; font-weight: 500; letter-spacing: .025em; }
.philosophy-statement span { display: block; }
.philosophy-copy { border-left: 1px solid var(--color-border); padding-left: 40px; }
.philosophy-copy p + p { margin-top: 20px; }
.business { background: #0a1422; }
.business-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.business-card { min-width: 0; padding: 30px 26px 34px; border: 1px solid #2a4258; border-radius: 8px; background: var(--color-surface); }
.card-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 38px; }
.business-icon { stroke: var(--color-accent); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; width: 38px; height: 38px; }
.card-index { color: var(--color-muted); font-size: 10px; letter-spacing: .12em; }
.business-card h3 { font-size: 20px; line-height: 1.5; font-weight: 500; letter-spacing: -.015em; overflow-wrap: anywhere; }
.business-card p { margin-top: 20px; font-size: 16px; line-height: 1.9; }
.technology-tags { display: flex; flex-wrap: wrap; gap: 14px; }
.technology-tags li { border: 1px solid #42556a; border-radius: 100px; padding: 10px 24px; font-size: 16px; line-height: 1.6; max-width: 100%; overflow-wrap: anywhere; }
.company-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 56px; }
.company-grid .section-label { align-self: start; }
.company-grid h2 { display: grid; gap: 8px; }
.company-details { border-top: 1px solid #42556a; min-width: 0; }
.company-details > div { display: grid; grid-template-columns: 155px minmax(0, 1fr); border-bottom: 1px solid var(--color-border); }
.company-details dt, .company-details dd { padding: 21px 14px; overflow-wrap: anywhere; }
.company-details dt { color: var(--color-muted); }
.company-details .pending { color: #bdc9d6; }
.site-footer { border-top: 1px solid var(--color-border); padding-block: 32px; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.footer-brand { gap: 12px; font-size: 14px; }
.site-footer small { font-size: 12px; color: var(--color-muted); }

.error-page { min-height: 100svh; display: flex; flex-direction: column; }
.error-main { flex: 1; display: grid; align-content: center; padding-block: 100px; }
.error-main h1 { font-size: clamp(28px, 5vw, 52px); margin-block: 24px; }
.error-main p { color: var(--color-muted); }
.error-main .error-code { color: var(--color-accent); font-size: 14px; letter-spacing: .15em; }
.back-link { display: inline-flex; justify-self: start; align-items: center; min-height: 44px; margin-top: 32px; color: var(--color-text); text-decoration: underline; text-decoration-color: var(--color-accent); text-underline-offset: 8px; }

@media (max-width: 1023px) {
  :root { --header-height: 80px; }
  .site-header:not(.menu-ready) { position: static; }
  .header-inner { flex-wrap: wrap; gap: 0 16px; padding-block: 14px; }
  .primary-nav { width: 100%; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px 20px; padding-top: 16px; }
  .primary-nav a { padding: 8px 0; }
  .menu-toggle { margin-left: auto; }
  .menu-ready .primary-nav { position: absolute; top: 100%; left: 0; right: 0; width: auto; padding: 20px 40px; border-bottom: 1px solid var(--color-border); background: var(--color-bg); max-height: calc(100dvh - var(--header-height)); overflow-y: auto; }
  .hero-inner { padding-top: 80px; }
  .hero-art { opacity: .55; right: -350px; }
  .philosophy-grid, .business-grid, .company-grid { grid-template-columns: 1fr; gap: 32px; }
  .philosophy-copy { padding-left: 0; border-left: 0; max-width: 720px; }
  .business-card { padding: 28px; }
  .card-top { margin-bottom: 24px; }
  .company-grid .section-label { margin-bottom: 8px; }
  .company-grid h2 { display: flex; gap: 18px; }
}

@media (max-width: 767px) {
  :root { --header-height: 76px; }
  .container { width: calc(100% - 40px); }
  .brand { gap: 9px; }
  .brand img { width: 35px; height: auto; }
  .brand-name { font-size: 14px; letter-spacing: .015em; }
  .brand-english { font-size: 9px; letter-spacing: .08em; }
  .menu-toggle { font-size: 12px; gap: 8px; padding-inline: 7px; }
  .menu-ready .primary-nav { padding: 16px 20px; }
  .hero-inner { padding-top: 64px; padding-bottom: 24px; }
  .eyebrow { font-size: 10px; letter-spacing: .09em; }
  .eyebrow-cross { margin-inline: 3px; }
  h1 { margin-top: 28px; font-size: clamp(36px, 10vw, 44px); line-height: 1.5; letter-spacing: .02em; }
  .hero-english { font-size: 18px; letter-spacing: .01em; margin-top: 16px; }
  .hero-description { font-size: 16px; margin-top: 28px; letter-spacing: .02em; }
  .hero-art { width: 660px; height: 480px; top: 105px; right: -400px; opacity: .4; }
  .hero-foot { margin-top: 60px; gap: 14px; font-size: 9px; letter-spacing: .08em; }
  .section { padding-block: 56px; }
  .section-label { gap: 12px; margin-bottom: 30px; }
  .section-label h2 { font-size: 21px; gap: 12px; }
  .section-label h2 span { font-size: 11px; }
  .philosophy-statement { font-size: clamp(23px, 5.9vw, 28px); letter-spacing: 0; }
  .philosophy-grid { gap: 26px; }
  .business-grid { gap: 16px; }
  .business-card { padding: 25px 22px 28px; }
  .business-card h3 { font-size: 20px; }
  .business-card p { margin-top: 16px; }
  .technology-tags { gap: 10px; }
  .technology-tags li { padding: 9px 16px; font-size: 15px; }
  .company-details > div { grid-template-columns: 100px minmax(0, 1fr); }
  .company-details dt, .company-details dd { padding: 18px 6px; font-size: 16px; }
  .footer-inner { align-items: flex-start; flex-direction: column; gap: 16px; }
  .site-footer { padding-block: 26px; }
}

@media (max-width: 359px) {
  .header-inner { gap: 8px; }
  .menu-toggle { margin-left: 0; }
  .brand-name { font-size: 13px; }
  .company-details > div { grid-template-columns: 1fr; }
  .company-details dt { padding-bottom: 0; }
  .company-details dd { padding-top: 8px; }
  .hero-foot { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}