:root {
  color-scheme: dark;
  --bg: #080b0e;
  --ink: #f0f3f1;
  --muted: #aab5b2;
  --mint: #baffdd;
  --line: #52625e;
  --sans: "Noto Sans CJK JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --gutter: clamp(28px, 4.45vw, 80px);
  --ease: cubic-bezier(.22, 1, .36, 1);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 0; }
body { isolation: isolate; margin: 0; background: var(--bg); color: var(--ink); font: 400 16px/1.9 var(--sans); overflow-x: clip; }
::selection { background: var(--mint); color: var(--bg); }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: 0; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--mint); outline-offset: 7px; }
button:disabled { cursor: default; }
#plexus { position: fixed; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: -1; }
.progress { position: fixed; left: 0; top: 0; height: 2px; background: var(--mint); width: 100%; transform-origin: left; transform: scaleX(0); z-index: 30; pointer-events: none; }
.wrap { max-width: 1760px; padding-inline: var(--gutter); margin-inline: auto; }
.header { height: 104px; display: flex; justify-content: space-between; align-items: center; padding-inline: var(--gutter); position: absolute; top: 0; left: 0; width: 100%; z-index: 10; gap: 30px; }
.wordmark { font: 400 22px/1.3 var(--sans); letter-spacing: .38em; white-space: nowrap; }
.header nav { display: flex; align-items: center; gap: clamp(24px, 3.2vw, 50px); font-size: 13px; letter-spacing: .06em; }
.header nav > a { position: relative; transition: color .25s; }
.header nav > a:not(.nav-contact)::after { content: ""; height: 1px; background: var(--mint); position: absolute; bottom: -6px; left: 0; width: 100%; transform: scaleX(0); transform-origin: left; transition: transform .35s var(--ease); }
.header nav > a:hover { color: var(--mint); }
.header nav > a:hover::after { transform: scaleX(1); }
.nav-contact { padding: 10px 25px; border: 1px solid #a3b3ad; transition: background .25s, color .25s !important; }
.nav-contact:hover { background: var(--mint); color: var(--bg) !important; }
.menu { display: none; }
.hero { min-height: 760px; height: 100svh; max-height: 1180px; position: relative; display: flex; align-items: center; padding-top: 54px; }
.hero-copy { position: relative; padding-bottom: 10px; }
.hero h1 { font: 700 clamp(54px, 6.1vw, 100px)/1.27 var(--sans); letter-spacing: -.055em; margin: 0 0 30px; }
.hero h1 > span { display: block; }
.hero-copy > p { font-size: clamp(15px, 1.25vw, 19px); line-height: 2; letter-spacing: .035em; margin: 0 0 48px; max-width: 660px; text-wrap: pretty; }
.actions { display: flex; align-items: center; gap: 44px; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 38px; min-height: 60px; padding: 13px 0; font-size: 15px; letter-spacing: .08em; border-bottom: 1px solid var(--ink); transition: color .3s, background .3s; }
.button.primary { background: var(--mint); color: var(--bg); border: 1px solid var(--mint); padding-inline: 30px; }
.button.primary:hover { background: #e1ffed; }
.button:not(.primary):hover { color: var(--mint); border-color: var(--mint); }
.arrow { width: 27px; height: 27px; fill: none; stroke: currentColor; stroke-width: 1.25; flex-shrink: 0; transition: transform .45s var(--ease); }
a:hover > .arrow { transform: translate(3px, -3px); }
.hero-bottom { position: absolute; bottom: 30px; left: var(--gutter); right: var(--gutter); display: flex; justify-content: space-between; align-items: center; border-top: 1px solid var(--line); padding-top: 20px; }
.scroll-link { font-size: 9px; letter-spacing: .25em; display: inline-flex; align-items: center; gap: 30px; }
.scroll-stroke { display: inline-block; height: 30px; width: 1px; background: #53625d; position: relative; overflow: hidden; }
.scroll-stroke::after { content: ""; position: absolute; width: 1px; height: 15px; background: var(--mint); top: 0; animation: scroll-cue 2.4s ease-in-out infinite; }
@keyframes scroll-cue { 0% { transform: translateY(-18px); } 65%, 100% { transform: translateY(34px); } }
.motion { display: inline-flex; align-items: center; gap: 15px; font-size: 10px; letter-spacing: .04em; padding: 0; min-height: 44px; }
.motion-icon { display: grid; place-items: center; border: 1px solid #b7c3be; width: 38px; height: 38px; border-radius: 50%; transition: background .2s; }
.motion-icon::before { content: ""; display: block; width: 7px; height: 12px; border-left: 1px solid; border-right: 1px solid; }
.motion[aria-pressed="true"] .motion-icon::before { width: 0; height: 0; border: 5px solid transparent; border-left: 8px solid currentColor; margin-left: 6px; }
.motion:hover .motion-icon { background: #baffdd18; }
.motion[hidden] { display: none; }
body.motion-paused .scroll-stroke::after { animation-play-state: paused; }
h2 { font: 700 clamp(44px, 5.1vw, 80px)/1.35 var(--sans); letter-spacing: -.055em; margin: 0; }
.accent { color: var(--mint); }
.business { padding-block: 130px 70px; }
.philosophy-intro { display: grid; grid-template-columns: .95fr 1.05fr; gap: 55px; align-items: center; margin-bottom: 80px; }
.philosophy-intro h2 { font-size: clamp(54px, 7.8vw, 120px); line-height: 1.15; }
.intro { font-size: clamp(16px, 1.35vw, 21px); line-height: 2.2; letter-spacing: .04em; margin: 0; text-wrap: pretty; }
.services { scroll-margin-top: 100px; }
.service { border-top: 1px solid var(--line); }
.service:last-child { border-bottom: 1px solid var(--line); }
.service summary { list-style: none; cursor: pointer; display: grid; grid-template-columns: 155px 1fr 1.4fr 36px; gap: 36px; align-items: center; min-height: 170px; transition: background .3s; }
.service summary::-webkit-details-marker { display: none; }
.service summary:hover, .service[open] summary { background: #baffdd05; }
.number { font: 200 80px/1 Arial, sans-serif; color: var(--mint); border-right: 1px solid var(--line); letter-spacing: -.06em; }
.service h3 { font: 600 clamp(22px, 2.1vw, 33px)/1.5 var(--sans); letter-spacing: -.035em; margin: 0; }
.service summary p { font-size: clamp(13px, 1.1vw, 17px); line-height: 2; margin: 0; color: #d4ded9; }
.service summary p br { display: none; }
.service .arrow { width: 34px; height: 34px; }
.service[open] .arrow { transform: rotate(90deg); }
.service-detail { margin: 0 70px 40px 191px; color: var(--muted); max-width: 800px; font-size: 15px; line-height: 2.1; padding-top: 4px; animation: detail-in .4s var(--ease); }
@keyframes detail-in { from { opacity: 0; transform: translateY(-5px); } to { opacity: 1; transform: none; } }
.service-detail a { color: var(--mint); display: block; width: fit-content; margin-top: 16px; border-bottom: 1px solid #baffdd60; }
.project { padding-block: 110px 140px; }
.section-label { display: flex; gap: 26px; align-items: center; font-size: 12px; letter-spacing: .35em; margin-bottom: 50px; }
.section-label > span { width: 44px; height: 1px; background: var(--line); order: 1; }
.project-layout { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 72px; }
.project-number { font: 700 clamp(140px, 22vw, 340px)/.95 Arial, sans-serif; letter-spacing: -.085em; color: transparent; -webkit-text-stroke: 1px var(--mint); user-select: none; transform: translateX(-.02em); }
.project-copy h2 { font-size: clamp(23px, 2.45vw, 36px); letter-spacing: -.035em; margin-bottom: 25px; }
.project-copy p { font-size: 16px; line-height: 2.1; margin: 0 0 30px; color: #d7dfda; }
.text-link { display: inline-flex; align-items: center; justify-content: space-between; gap: 60px; font-size: 20px; letter-spacing: .1em; padding-bottom: 10px; border-bottom: 1px solid var(--ink); transition: color .25s; }
.text-link:hover { color: var(--mint); }
.secondary-link { display: block; width: fit-content; color: var(--muted); font-size: 13px; letter-spacing: .08em; margin-top: 26px; padding-bottom: 6px; border-bottom: 1px solid #52625e; }
.secondary-link:hover { color: var(--mint); }
.contact { padding-block: 80px 65px; position: relative; }
.contact::before { content: ""; position: absolute; top: 0; left: var(--gutter); right: var(--gutter); height: 1px; background: var(--line); }
.contact-intro { display: grid; grid-template-columns: 1.1fr 1fr; gap: 45px; align-items: end; margin-bottom: 50px; }
.contact h2 { font-size: clamp(48px, 5.7vw, 90px); }
.contact p { font-size: 17px; line-height: 2; margin: 0 0 9px; color: #d7dfda; text-wrap: pretty; }
.email { display: inline-flex; max-width: 100%; gap: 35px; align-items: center; font: 300 clamp(28px, 4.9vw, 76px)/1.4 Arial, sans-serif; letter-spacing: -.04em; border-bottom: 1px solid var(--ink); padding-bottom: 12px; transition: color .3s; }
.email .arrow { width: 52px; height: 52px; stroke-width: .8; }
.email:hover { color: var(--mint); }
.copy { display: block; width: fit-content; padding: 13px 0 5px; font-size: 12px; letter-spacing: .06em; border-bottom: 1px solid var(--line); margin-top: 5px; }
.copy:hover { color: var(--mint); }
.copy-status { display: block; color: var(--mint); font-size: 12px; min-height: 28px; margin-top: 10px; }
.about { display: grid; grid-template-columns: .7fr 1.7fr; gap: 40px; align-items: center; padding-block: 42px; position: relative; }
.about::before { content: ""; position: absolute; top: 0; left: var(--gutter); right: var(--gutter); height: 1px; background: var(--line); }
.about h2 { font: 400 15px/1.8 var(--sans); letter-spacing: .15em; }
.about dl { display: grid; grid-template-columns: .45fr 1.7fr; gap: 30px; font-size: 12px; margin: 0; }
.about dl > div { border-left: 1px solid var(--line); padding-left: 30px; }
.about dl > div:last-child { grid-column: 2; border: 0; padding-left: 30px; margin-top: -17px; }
.about dt { color: var(--muted); font-size: 11px; }
.about dd { margin: 4px 0 0; }
.about dl > div:last-child dt { display: none; }
.footer { padding-block: 32px; position: relative; display: flex; justify-content: space-between; gap: 35px; align-items: center; }
.footer::before { content: ""; position: absolute; top: 0; left: var(--gutter); right: var(--gutter); height: 1px; background: var(--line); }
.footer .wordmark { font-size: 13px; }
.footer p { font-size: 10px; color: var(--muted); margin: 10px 0 0; }
.footer small, .back-top { font-size: 10px; letter-spacing: .06em; color: var(--muted); }
.footer small { margin-left: auto; order: 1; }
.back-top { order: 2; border-left: 1px solid var(--line); padding-left: 35px; }
.skip { position: fixed; top: 12px; left: 12px; z-index: 50; background: var(--mint); color: var(--bg); padding: 10px 18px; transform: translateY(-180%); }
.skip:focus { transform: none; }
.enhanced .reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.enhanced .reveal.visible { opacity: 1; transform: none; }
@media (min-width: 1760px) { .header { padding-inline: max(80px, calc((100vw - 1600px)/2)); } }
@media (max-width: 1100px) {
  .header nav { gap: 22px; }
  .wordmark { font-size: 18px; letter-spacing: .3em; }
  .hero h1 { font-size: clamp(50px, 6.4vw, 70px); }
  .hero-copy > p { max-width: 540px; font-size: 16px; }
  .service summary { grid-template-columns: 100px 1fr 1.15fr 28px; gap: 25px; }
  .number { font-size: 65px; }
  .service-detail { margin-left: 125px; }
  .philosophy-intro { gap: 35px; }
  .project-layout { gap: 45px; }
  .project-copy p { font-size: 14px; }
  .contact-intro { grid-template-columns: 1fr; gap: 25px; }
  .about { grid-template-columns: .65fr 1.7fr; gap: 20px; }
  .about dl { gap: 18px; }
  .about dl > div { padding-left: 18px; }
  .about dl > div:last-child { padding-left: 18px; }
}
@media (max-width: 760px) {
  :root { --gutter: 24px; }
  html { scroll-padding-top: 0; }
  .header { height: 84px; gap: 15px; }
  .wordmark { font-size: 15px; letter-spacing: .28em; }
  .menu { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; font-size: 11px; letter-spacing: .06em; padding: 8px 0 8px 12px; }
  .menu span { font-size: 20px; transition: transform .3s; }
  .menu[aria-expanded="true"] span { transform: rotate(45deg); }
  .header nav { display: none; position: absolute; top: 75px; left: 16px; right: 16px; background: #0b1113f5; backdrop-filter: blur(18px); border: 1px solid #42534b; padding: 24px; flex-direction: column; align-items: stretch; gap: 0; }
  .header nav.open { display: flex; }
  .header nav a { min-height: 48px; display: flex; align-items: center; font-size: 14px; }
  .nav-contact { justify-content: center; margin-top: 12px; }
  .hero { min-height: 740px; max-height: 960px; padding-top: 94px; align-items: center; }
  .hero-copy { padding: 0 0 70px; width: 100%; }
  .hero h1 { font-size: clamp(34px, 8.6vw, 62px); line-height: 1.45; letter-spacing: -.055em; margin-bottom: 27px; }
  .hero-copy > p { font-size: 13px; line-height: 2.2; max-width: 290px; margin-bottom: 34px; letter-spacing: .02em; }
  .actions { gap: 26px; flex-wrap: wrap; }
  .button { min-height: 50px; font-size: 12px; gap: 25px; }
  .button.primary { padding: 12px 22px; }
  .button .arrow { width: 21px; height: 21px; }
  .hero-bottom { bottom: 23px; padding-top: 17px; }
  .scroll-link { font-size: 7px; gap: 12px; letter-spacing: .15em; }
  .scroll-stroke { height: 23px; }
  .motion { font-size: 9px; gap: 8px; }
  .motion-icon { width: 30px; height: 30px; }
  .business { padding-block: 80px 35px; }
  .philosophy-intro { grid-template-columns: 1fr; gap: 35px; margin-bottom: 45px; }
  .philosophy-intro h2 { font-size: clamp(46px, 12vw, 70px); }
  .intro { font-size: 14px; line-height: 2.1; }
  .service summary { grid-template-columns: 54px 1fr 23px; gap: 14px; min-height: 152px; padding-block: 24px; }
  .number { font-size: 42px; align-self: start; grid-row: span 2; }
  .service h3 { font-size: clamp(17px, 4.4vw, 24px); align-self: center; }
  .service summary p { font-size: 12px; grid-column: 2; grid-row: 2; line-height: 1.9; }
  .service .arrow { grid-column: 3; grid-row: 1 / span 2; width: 24px; height: 24px; }
  .service-detail { font-size: 13px; margin: 0 8px 28px 68px; }
  .project { padding-block: 70px 80px; }
  .section-label { font-size: 10px; margin-bottom: 34px; gap: 20px; }
  .project-layout { grid-template-columns: 1fr; gap: 40px; }
  .project-number { font-size: clamp(115px, 31.5vw, 230px); }
  .project-copy h2 { font-size: clamp(20px, 5.4vw, 30px); }
  .project-copy p { font-size: 13px; }
  .text-link { font-size: 17px; }
  .secondary-link { font-size: 12px; }
  .contact { padding-block: 65px 32px; }
  .contact-intro { gap: 28px; margin-bottom: 34px; }
  .contact h2 { font-size: clamp(36px, 9.8vw, 58px); }
  .contact p { font-size: 13px; }
  .email { font-size: clamp(19px, 5.5vw, 39px); gap: 14px; letter-spacing: -.045em; padding-bottom: 10px; }
  .email .arrow { width: 25px; height: 25px; stroke-width: 1.2; }
  .copy { font-size: 11px; min-height: 44px; }
  .about { grid-template-columns: 1fr; gap: 25px; padding-block: 30px; }
  .about h2 { font-size: 13px; }
  .about dl { grid-template-columns: 1fr; gap: 20px; }
  .about dl > div { display: grid; grid-template-columns: 75px 1fr; border: 0; padding: 0; }
  .about dl > div:last-child { grid-column: 1; padding: 0; margin: 0; }
  .about dl > div:last-child dt { display: block; }
  .about dd { margin: 0; }
  .footer { gap: 24px; padding-block: 28px; flex-wrap: wrap; }
  .footer .wordmark { font-size: 12px; }
  .footer p { font-size: 9px; }
  .footer small { width: 100%; margin: 0; order: 3; }
  .back-top { border: 0; padding: 0; margin-left: auto; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .enhanced .reveal { opacity: 1; transform: none; }
}