/* ARKe v3。動きの層は layout に触らない。動きは data-motion=full|lite のときだけ JS が足す。 */
:root {
  --paper: #F4F4F2; --white: #FFFFFF; --ink: #0E1110; --line: #D2D2CD; --line-w: rgba(255,255,255,.26);
  --m: 64px; --g: 24px; --bar: 64px;
  --en: "ARKe Inter", "ARKe Noto JP", sans-serif;
  --ja: "ARKe Noto JP", "ARKe Inter", sans-serif;
  --e-out: cubic-bezier(.16,1,.3,1);
  --e-io: cubic-bezier(.76,0,.24,1);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: calc(var(--bar) + 32px); }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 1rem/1.85 var(--ja); letter-spacing: .04em; overflow-x: clip; }
h1, h2, h3, h4, p, ul, ol, dl, dd, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
h1, h2, h3 { font-weight: 500; letter-spacing: .02em; font-feature-settings: "palt"; word-break: auto-phrase; text-wrap: balance; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; letter-spacing: inherit; }
img, video { display: block; max-width: 100%; height: auto; }
:focus-visible { outline: 2px solid currentColor; outline-offset: 3px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; z-index: 60; background: var(--white); padding: 8px 16px; }

/* ロゴは紙の上だけに置く。バーは常に紙の色。 */
.bar { position: fixed; z-index: 40; inset: 0 0 auto 0; height: var(--bar); padding: 0 var(--m); display: flex; align-items: center; gap: 32px; background: var(--paper); border-bottom: 1px solid var(--line); view-transition-name: bar; }
.bar__logo { margin-right: auto; display: block; padding: 12px 0; }
.bar__logo img { width: 120px; }
.bar__nav ul { display: flex; gap: 32px; }
.bar__nav a { display: inline-block; padding: 10px 0; min-height: 44px; font: 500 14px/1.6 var(--en); letter-spacing: .04em; text-decoration: none; background: linear-gradient(currentColor, currentColor) left bottom / 0 1px no-repeat; transition: background-size 280ms var(--e-out); }
.bar__nav a:hover, .bar__nav a[aria-current] { background-size: 100% 1px; }
.bar__here { display: none; font: 500 12px/1.4 var(--en); letter-spacing: .06em; }
html:not(.js) .bar__menu { display: none; }
.bar__menu { min-height: 44px; padding: 0 0 0 32px; border-left: 1px solid var(--line); font: 500 14px/1 var(--en); letter-spacing: .04em; }

.menu { width: 100%; max-width: none; height: 100vh; height: 100dvh; max-height: none; margin: 0; border: 0; padding: 0; background: var(--ink); color: var(--white); overscroll-behavior: contain; }
.menu[open] { display: flex; flex-direction: column; animation: menu-in 380ms var(--e-io) both; }
.menu.is-closing { animation: menu-out 280ms var(--e-io) both; }
@keyframes menu-in { from { clip-path: inset(0 0 100% 0); } to { clip-path: inset(0); } }
@keyframes menu-out { to { opacity: 0; } }
.menu::backdrop { background: var(--ink); }
.menu__bar { height: var(--bar); padding: 0 var(--m); display: flex; align-items: center; justify-content: space-between; background: var(--paper); color: var(--ink); flex: none; }
.menu__bar img { width: 120px; }
.menu__bar a { display: block; padding: 12px 0; }
.menu__close { min-height: 44px; font: 500 14px/1 var(--en); letter-spacing: .04em; }
.menu nav { padding: 48px var(--m) 32px; }
.menu li { border-top: 1px solid var(--line-w); max-width: 760px; }
.menu li:last-child { border-bottom: 1px solid var(--line-w); }
.menu nav a { display: block; padding: 12px 0; font: 400 56px/1.25 var(--en); text-decoration: none; letter-spacing: 0; }
.menu nav a[aria-current] { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 8px; }
.menu address { padding: 0 var(--m) 48px; font-style: normal; font-size: 14px; color: var(--line); }
.menu address a { display: inline-block; padding: 12px 0; }

main { padding-top: var(--bar); }
.lb { font: 500 12px/1.4 var(--en); letter-spacing: .06em; }
.lb--w { color: var(--white); }
.lead { font-size: 1.25rem; line-height: 1.9; max-width: 720px; text-wrap: pretty; }
.note { font-size: 15px; line-height: 1.7; margin-top: 24px; max-width: 720px; }
.gen { margin-top: 24px; font-size: 13px; line-height: 1.6; }
.crumb { position: absolute; z-index: 3; left: 0; padding: 20px var(--m) 0; font: 500 12px/1.4 var(--en); letter-spacing: .06em; mix-blend-mode: difference; color: #fff; }
.crumb ol { display: flex; gap: 8px; }
.crumb li + li::before { content: "/"; margin-right: 8px; }
.crumb a { display: inline-block; padding: 14px 10px; margin: -14px -10px; text-decoration: underline; text-underline-offset: 4px; }
.tl { display: inline-flex; align-items: center; gap: 12px; min-height: 44px; margin-top: 32px; font-size: 16px; font-weight: 500; text-decoration: none; background: linear-gradient(currentColor, currentColor) left bottom / 100% 1px no-repeat; }
.tl span { transition: transform 240ms var(--e-out); }
.tl:hover span { transform: translateX(6px); }
.ring { width: 64px; height: 64px; flex: none; border: 1px solid currentColor; border-radius: 50%; display: grid; place-items: center; font-size: 20px; transition: transform 240ms var(--e-out), background-color 240ms var(--e-out), color 240ms var(--e-out); }
a:hover > .ring, a:hover > * > .ring { transform: translateX(8px); }

/* 暗い章。JS が無ければ最初から暗い。動く環境では画面に入る時に紙から暗くなる。 */
.dark { background: var(--ink); color: var(--white); }
[data-tone] { transition: background-color 700ms var(--e-io), color 700ms var(--e-io); }
[data-tone].is-paper { background: var(--paper); color: var(--ink); }

/* ヒーロー。文字は常に HTML。地は写真で、WebGL が読めれば上に光を足す。 */
.hero { position: relative; min-height: calc(100vh - var(--bar)); min-height: calc(100svh - var(--bar)); display: flex; align-items: flex-end; overflow: clip; isolation: isolate; }
.hero__ground { display: none; }
.hero__gl { display: block; width: 100%; height: 100%; opacity: 0; transition: opacity 900ms var(--e-out); }
.hero-on .hero__gl { opacity: 1; }
.hero__copy { padding: 64px var(--m) 56px; }
.hero__en { font: 400 clamp(64px, min(15vw, 17vh), 208px)/.96 var(--en); letter-spacing: -.02em; font-feature-settings: normal; }
.ln { display: block; overflow: clip; overflow-clip-margin: .08em; }
.ln > span { display: block; }
.hero__tag { margin-top: 32px; font-size: 28px; word-break: auto-phrase; line-height: 1.45; font-weight: 500; letter-spacing: .02em; }
.hero__lead { margin-top: 12px; font-size: 16px; max-width: 520px; text-wrap: pretty; }
.hero .gen { margin-top: 12px; }

/* 文字だけの大きな章と、広がる映像 */
.mani__text { padding: 160px var(--m) 120px; display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--g); row-gap: 40px; }
.mani__text .lb { grid-column: 1 / span 2; padding-top: 24px; }
.mani h2 { grid-column: 3 / -1; font-size: clamp(48px, 7vw, 104px); line-height: 1.2; }
.mani .lead { grid-column: 7 / -1; }
.film { overflow: clip; }
.film video { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; background: #222; }

/* 工程。写真が順に重なる。JS が無くても sticky だけで成立する。 */
.proc__head { padding: 120px var(--m) 96px; }
.proc__head .lead { max-width: 640px; }
.proc__head h2 { font-size: clamp(40px, 5vw, 72px); line-height: 1.25; margin: 24px 0; }
.pstep { position: relative; display: flow-root; }
.pstep__view { position: sticky; top: var(--bar); height: calc(100vh - var(--bar)); height: calc(100svh - var(--bar)); overflow: clip; background: var(--ink); }
.pstep__img { width: 100%; height: 100%; object-fit: cover; }
.pstep__text { position: relative; z-index: 1; width: min(520px, calc(100% - 2 * var(--m))); margin: -46vh 0 28vh var(--m); padding: 40px; background: var(--paper); }
/* 工程ごとに形を変える。同じカードを繰り返さない。 */
@media (min-width: 768px) {
  .pstep:nth-child(2) .pstep__text { margin-left: auto; margin-right: var(--m); background: none; color: var(--white); padding: 0; margin-top: -70vh; margin-bottom: 52vh; }
  .pstep:nth-child(2) h3 { font-size: clamp(56px, 7vw, 104px); }
  .pstep:nth-child(3) .pstep__text { width: 100%; margin: -30vh 0 12vh; padding: 40px var(--m); display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); column-gap: var(--g); align-items: end; }
  .pstep:nth-child(3) .pstep__no { grid-column: 1 / -1; }
  .pstep:nth-child(3) h3 { margin-bottom: 0; font-size: clamp(48px, 5vw, 72px); }
  .pstep:nth-child(4) .pstep__text { margin-left: auto; margin-right: var(--m); margin-top: -80vh; margin-bottom: 62vh; }
  .pstep:nth-child(5) .pstep__text { background: var(--ink); color: var(--white); margin-left: calc(var(--m) + 12vw); }
}
.pstep__no { font: 500 12px/1.4 var(--en); letter-spacing: .06em; margin-bottom: 20px; }
.pstep h3 { display: flex; align-items: baseline; gap: 16px; font-size: 48px; line-height: 1.2; margin-bottom: 16px; }
.pstep__en { font: 500 12px/1.4 var(--en); letter-spacing: .06em; }

/* 領域。等幅に並べない。 */
.areas { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--g); row-gap: 48px; padding: 0 0 160px; }
.areas__head { grid-column: 1 / -1; padding: 96px var(--m) 40px; display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--g); }
.areas__head .lb { grid-column: 1 / -1; margin-bottom: 24px; }
.areas__head h2 { grid-column: 1 / span 6; font-size: clamp(36px, 4vw, 56px); line-height: 1.3; }
.areas__head .lead, .areas__head .tl { grid-column: 7 / -1; justify-self: start; }
.areas__head .tl { margin-top: 24px; }
.area { overflow: clip; }
.area img { width: 100%; height: auto; }
.area figcaption { padding-top: 12px; font-size: 16px; font-weight: 500; }
.area--a { grid-column: 1 / -1; }
.area--a img { height: min(80vh, 56vw); object-fit: cover; }
.area--a figcaption { padding-left: var(--m); }
.area--b { grid-column: 2 / span 6; }
.area--c { grid-column: 8 / span 5; margin-top: 128px; padding-right: var(--m); }
.areas--sv { padding-top: 96px; }

/* ABOUT への扉 */
.door { position: relative; display: block; height: 80vh; min-height: 480px; overflow: clip; text-decoration: none; color: var(--white); background: var(--ink); }
.door__media { position: absolute; inset: 0; display: block; }
.door__media img { width: 100%; height: 116%; max-width: none; object-fit: cover; margin-top: -8%; filter: brightness(.62); }
.door__text { position: absolute; inset: auto var(--m) 56px var(--m); display: grid; grid-template-columns: minmax(0, 1fr) auto; column-gap: 32px; align-items: end; }
.door__text .lb { grid-column: 1 / -1; margin-bottom: 16px; display: block; }
.door__h { font-size: clamp(32px, 4.4vw, 64px); line-height: 1.3; font-weight: 500; letter-spacing: .02em; word-break: auto-phrase; text-wrap: balance; }

/* 問い合わせの帯 */
.band { background: var(--ink); color: var(--white); }
.band a { display: flex; align-items: center; gap: 32px; flex-wrap: wrap; padding: 96px var(--m); text-decoration: none; }
.band__en { font: 500 clamp(64px, 10vw, 160px)/1 var(--en); letter-spacing: -.02em; }
.band__ja { font-size: 20px; font-weight: 500; margin-right: auto; }

/* ABOUT */
.abh { padding: 128px var(--m) 96px; }
.abh__en, .cth__en { font: 500 clamp(48px, 12vw, 176px)/1 var(--en); letter-spacing: -.02em; }
.abh h1 { font-size: clamp(28px, 3.4vw, 48px); line-height: 1.35; margin: 40px 0 32px; max-width: 900px; }
.abq { padding: 160px var(--m); display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--g); row-gap: 40px; }
.abq .lb { grid-column: 1 / span 2; padding-top: 16px; }
.abq h2 { grid-column: 3 / -1; font-size: clamp(40px, 5.6vw, 88px); line-height: 1.2; }
.abq .lead { grid-column: 7 / -1; }
.abr { padding: 160px var(--m) 128px; }
.abr h2 { font-size: clamp(32px, 3.6vw, 52px); line-height: 1.3; margin-top: 24px; }
.abr__grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--g); margin-top: 80px; }
.abr__item:nth-child(1) { grid-column: 1 / span 7; }
.abr__item:nth-child(2) { grid-column: 8 / span 5; margin-top: 96px; }
.rule { display: block; height: 1px; background: currentColor; transform-origin: left; margin-bottom: 24px; }
.abr__item h3 { font-size: 40px; line-height: 1.3; margin-bottom: 20px; }
.abr__item p { max-width: 560px; font-size: 18px; }
.abn { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.abn__media { overflow: clip; min-height: 640px; background: var(--ink); }
.abn__media img { width: 100%; height: 116%; object-fit: cover; margin-top: -8%; }
.abn__text { padding: 96px var(--m) 96px 64px; align-self: center; }
.abn__text h2 { font-size: 40px; line-height: 1.3; margin-bottom: 32px; }
.abn__text p + p { margin-top: 20px; }
.abc { padding: 160px var(--m) 128px; }
.abc h2 { font-size: 32px; line-height: 1.4; margin-top: 16px; }
.abc__lead { margin: 16px 0 48px; max-width: 720px; }
.tb > div, .roles > div { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: var(--g); padding: 18px 0; border-top: 1px solid var(--line); }
.tb > div:last-child, .roles > div:last-child { border-bottom: 1px solid var(--line); }
.tb dt, .roles dt { font-weight: 500; }
.tb a { display: inline-block; padding: 10px 0; margin: -10px 0; }
.tb--w > div, .tb--w > div:last-child { border-color: var(--line-w); }

/* SERVICE */
.svh { position: relative; min-height: 100vh; display: flex; align-items: flex-end; overflow: clip; isolation: isolate; }
.svh__media { position: absolute; inset: 0; z-index: -1; }
.svh__media video { width: 100%; height: 100%; object-fit: cover; }
.svh__media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(14,17,16,.82), rgba(14,17,16,.25) 70%); }
.svh__text { padding: 128px var(--m) 56px; }
.svh__en, .wkh__en { font: 500 clamp(48px, 12vw, 176px)/1 var(--en); letter-spacing: -.02em; }
.svh h1 { font-size: clamp(28px, 3vw, 44px); line-height: 1.35; margin: 24px 0; max-width: 900px; }
.svr, .svs { padding: 160px var(--m) 96px; }
.svr h2, .svs h2 { font-size: clamp(32px, 3.6vw, 52px); line-height: 1.3; margin: 24px 0; }
.roles { margin-top: 48px; }
.scope { margin-top: 48px; }
.scope__head { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr) minmax(0, 2fr); column-gap: var(--g); padding-bottom: 16px; }
.scope__head b, .scope__col h4 b { font-size: 20px; font-weight: 500; margin-right: 12px; }
.scope__head i, .scope__col h4 i { font: 500 12px/1.4 var(--en); font-style: normal; letter-spacing: .06em; }
.scope__row { border-top: 1px solid var(--line); }
.scope__row:last-child { border-bottom: 1px solid var(--line); }
.scope__row summary { list-style: none; display: grid; grid-template-columns: minmax(0, 1fr) auto; column-gap: 16px; align-items: center; min-height: 64px; padding: 16px 0; cursor: pointer; }
.scope__row summary::-webkit-details-marker { display: none; }
.scope__ja { font-size: 20px; font-weight: 500; grid-column: 1; }
.scope__en { grid-column: 1; font: 500 12px/1.4 var(--en); letter-spacing: .06em; }
.scope__row summary i { grid-column: 2; grid-row: 1 / span 2; width: 16px; height: 16px; background: linear-gradient(currentColor, currentColor) center/100% 1px no-repeat, linear-gradient(currentColor, currentColor) center/1px 100% no-repeat; transition: transform 240ms var(--e-out); }
.scope__row[open] summary i { transform: rotate(45deg); }
.scope__in { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr) minmax(0, 2fr); column-gap: var(--g); padding-bottom: 32px; }
.scope__note { font-size: 15px; line-height: 1.7; }
.scope__col h4 { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.scope__col li { padding: 4px 0; }
.svp { padding: 160px var(--m); }
.svp h2 { font-size: clamp(32px, 3.6vw, 52px); line-height: 1.3; margin: 24px 0; }
.steps { margin-top: 64px; }
.step { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); column-gap: var(--g); padding: 28px 0; border-top: 1px solid var(--line-w); }
.step:last-child { border-bottom: 1px solid var(--line-w); }
.step h3 { display: flex; align-items: baseline; gap: 16px; font-size: 28px; line-height: 1.3; }
.step__no, .step__en { font: 500 12px/1.4 var(--en); letter-spacing: .06em; }

/* WORKS */
.wkh { position: relative; min-height: calc(100vh - var(--bar)); min-height: calc(100svh - var(--bar)); display: flex; align-items: flex-end; overflow: clip; isolation: isolate; }
.wkh__media { position: absolute; inset: 0; z-index: -1; }
.wkh__media video { width: 100%; height: 100%; object-fit: cover; }
.wkh__media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(14,17,16,.78), rgba(14,17,16,.1) 60%); }
.wkh__text { padding: 128px var(--m) 56px; }
.wkh h1 { font-size: clamp(32px, 4vw, 64px); line-height: 1.3; margin-top: 16px; }

/* CONTACT */
.cth { padding: 128px var(--m) 96px; }
.cth h1 { font-size: clamp(28px, 3.4vw, 48px); line-height: 1.35; margin: 32px 0 24px; }
.cta { display: inline-flex; align-items: center; gap: 24px; margin: 48px 0 16px; font-size: 24px; font-weight: 500; text-decoration: none; }
.cth__reply { font-size: 16px; }
.ctl { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.ctl__media { overflow: clip; min-height: 560px; background: var(--ink); }
.ctl__media img { width: 100%; height: 116%; object-fit: cover; margin-top: -8%; }
.ctl__body { padding: 96px var(--m); align-self: center; }
.ctl__body h2 { font-size: 40px; line-height: 1.3; margin-bottom: 40px; }
.check { counter-reset: c; }
.check li { counter-increment: c; display: grid; grid-template-columns: 48px minmax(0, 1fr); padding: 14px 0; border-top: 1px solid var(--line); }
.check li:last-child { border-bottom: 1px solid var(--line); }
.check li::before { content: counter(c); font: 500 14px/1.85 var(--en); }
.cta2 { padding: 96px var(--m); }

.foot { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--g); row-gap: 32px; padding: 64px var(--m) 32px; font-size: 14px; line-height: 1.7; }
.foot__l { grid-column: 1 / span 4; }
.foot__l img { width: 120px; }
.foot__tag { margin-top: 12px; }
.foot nav { grid-column: 5 / span 3; }
.foot nav a { display: inline-block; padding: 10px 0; min-height: 44px; font: 500 14px/1.6 var(--en); letter-spacing: .04em; text-decoration: none; }
.foot nav a:hover { text-decoration: underline; text-underline-offset: 6px; }
.foot__r { grid-column: 8 / span 5; }
.foot__r p + p { margin-top: 8px; }
.foot__r a { display: inline-block; padding: 8px 0; margin: -8px 0; }
.foot__band { grid-column: 1 / -1; font-size: 12px; }

/* ページ遷移。ここにだけ面の演出を置く。効かないブラウザでは普通の遷移になる。opt-in は CSS の到着を待たないよう head の style に置く。 */
@media (prefers-reduced-motion: no-preference) {
  ::view-transition { background: var(--ink); }
  ::view-transition-old(root) { animation: vt-old 520ms var(--e-io) both; }
  ::view-transition-new(root) { animation: vt-new 720ms var(--e-io) both; }
  ::view-transition-group(bar) { animation: none; z-index: 5; }
}
@keyframes vt-old { to { transform: translateY(-8vh); opacity: .25; } }
@keyframes vt-new { from { clip-path: inset(100% 0 0 0); } to { clip-path: inset(0); } }

@media (max-width: 1099px) {
  :root { --m: 40px; }
  .mani .lb, .abq .lb, .mani h2, .abq h2, .mani .lead, .abq .lead { grid-column: 1 / -1; }
  .areas__head h2, .areas__head .lead, .areas__head .tl { grid-column: 1 / -1; }
  .areas__head .lead { margin-top: 24px; }
  .abn, .ctl { grid-template-columns: minmax(0, 1fr); }
  .abn__media, .ctl__media { min-height: 0; aspect-ratio: 3 / 2; }
  .abn__text { padding: 64px var(--m); }
  .scope__head { grid-template-columns: minmax(0, 1fr); display: none; }
  .scope__in { grid-template-columns: minmax(0, 1fr); row-gap: 16px; }
  .scope__col h4 { position: static; width: auto; height: auto; overflow: visible; clip-path: none; margin-bottom: 4px; }
  .bar__nav ul { gap: 24px; }
}
@media (max-width: 767px) {
  :root { --m: 20px; --g: 12px; --bar: 56px; }
  .bar { gap: 12px; }
  .bar__logo img, .menu__bar img { width: 96px; }
  .bar__nav { display: none; }
  .bar__here { display: block; }
  .bar__menu { border-left: 0; padding: 0 0 0 16px; min-width: 44px; }
  .menu nav { padding-top: 32px; }
  .menu nav a { font-size: 32px; }
  .lead { font-size: 16px; }
  .hero__copy { padding: 48px var(--m) 32px; }
  .hero__en { font-size: min(20vw, 96px); }
  .hero__tag { font-size: clamp(19px, 5.6vw, 22px); margin-top: 24px; }
  .mani__text { padding: 96px var(--m) 64px; }
  .proc__head { padding: 72px var(--m) 56px; }
  .pstep__text { width: calc(100% - 2 * var(--m)); margin: -40vh var(--m) 24vh; padding: 24px; }
  .pstep h3 { font-size: 32px; }
  .areas { padding-bottom: 96px; row-gap: 32px; }
  .areas__head { padding: 96px var(--m) 32px; }
  .area--a img { height: 70vw; }
  .area--b { grid-column: 1 / span 11; }
  .area--c { grid-column: 3 / -1; margin-top: 0; padding-right: 0; }
  .area--b figcaption { padding-left: var(--m); }
  .door { height: 70vh; min-height: 400px; }
  .door__text { inset: auto var(--m) 32px var(--m); }
  .band a { padding: 64px var(--m); gap: 16px; }
  .band__en { width: 100%; font-size: min(17vw, 64px); }
  .band__ja { font-size: 16px; }
  .ring { width: 48px; height: 48px; }
  .abh, .cth { padding: 96px var(--m) 56px; }
  .abq, .svp { padding: 96px var(--m); }
  .abr, .abc, .svr, .svs { padding: 96px var(--m) 64px; }
  .abr__item:nth-child(1), .abr__item:nth-child(2) { grid-column: 1 / -1; margin-top: 0; }
  .abr__grid { margin-top: 48px; row-gap: 48px; }
  .abn__text, .ctl__body { padding: 56px var(--m); }
  .abn__text h2, .ctl__body h2 { font-size: 28px; }
  .tb > div, .roles > div { grid-template-columns: 1fr; gap: 2px; padding: 12px 0; }
  .step { grid-template-columns: minmax(0, 1fr); row-gap: 8px; }
  .svh, .wkh { min-height: calc(100svh - var(--bar)); }
  .svh__text, .wkh__text { padding: 96px var(--m) 32px; }
  .cta { font-size: 18px; gap: 16px; }
  .cta2 { padding: 64px var(--m); }
  .foot { display: block; padding: 48px var(--m) 32px; }
  .foot > * + * { margin-top: 24px; }
  html:not(.js) .bar { position: static; height: auto; flex-wrap: wrap; padding-top: 8px; padding-bottom: 8px; }
  html:not(.js) .bar__nav { display: block; width: 100%; }
  html:not(.js) .bar__nav ul { flex-wrap: wrap; gap: 0 16px; }
  html:not(.js) .bar__here { display: none; }
  html:not(.js) main { padding-top: 0; }
}
@media (max-height: 680px) and (min-width: 768px) {
  .hero__tag { font-size: 22px; margin-top: 16px; }
  .hero__copy { padding-top: 24px; padding-bottom: 24px; }
  .hero__lead { margin-top: 6px; }
}
@media print {
  .bar__menu, .hero__gl, .menu { display: none !important; }
  .bar { position: static; }
  main { padding-top: 0; }
  .pstep__view { position: static; height: auto; }
  .pstep__text { margin: 0 0 24px; }
  .dark { background: none; color: var(--ink); }
  .scope__in { display: grid !important; }
}

/* ===== v4: 図面の気配（決定 §1-16〜1-18）。写真と動画は使わない。暗い面は CONTACT 帯とメニューだけ。 ===== */
:root { --hair: #B4B4AE; --grid: #E6E6E1; --mute: #6F6F6A; --mono: Consolas, "SFMono-Regular", Menlo, monospace; }
.sym { font: 500 12px/1.4 var(--mono); letter-spacing: .06em; color: var(--mute); }
.dark { background: var(--paper); color: var(--ink); }
.hero { align-items: stretch; display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--g); padding: 0 var(--m); }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -2; background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px); background-size: 80px 80px; background-position: 0 100%; -webkit-mask-image: radial-gradient(120% 90% at 0% 100%, #000 20%, transparent 70%); mask-image: radial-gradient(120% 90% at 0% 100%, #000 20%, transparent 70%); }
.hero-on .hero::before { display: none; }
.hero__fx { position: absolute; inset: 0; z-index: -1; width: 100%; height: 100%; pointer-events: none; }
.axis { position: absolute; top: 12px; bottom: 0; left: calc(var(--m) - var(--g) / 2 + (100% - 2 * var(--m) + var(--g)) * var(--col) / 12); width: 0; z-index: -1; }
.axis svg { position: absolute; top: 0; left: -14px; width: 28px; height: 100%; overflow: visible; }
.axis text, .layers text.s { font: 500 11px var(--mono); fill: var(--mute); }
.hero__copy { grid-column: 1 / 9; align-self: end; padding: 64px 0 72px; }
.hero__en { font-weight: 600; font-size: clamp(64px, min(10.8vw, 16vh), 180px); line-height: .9; }
.hscope { grid-column: 9 / 13; align-self: end; margin: 0 0 72px 12px; border-top: 1px solid var(--ink); font-size: 14px; }
.hscope div { display: grid; grid-template-columns: 72px 1fr; padding: 12px 0; border-bottom: 1px solid var(--line); }
.hscope dt { font-size: 12px; color: var(--mute); padding-top: 2px; }
.hscope dd { margin: 0; line-height: 1.7; }
.sheetno { position: absolute; right: var(--m); bottom: 24px; margin: 0; }
.abh, .cth, .wk4 { position: relative; }
.abh .sheetno, .cth .sheetno, .wk4 .sheetno { top: 24px; bottom: auto; }
.mani { border-top: 1px solid var(--line); }
.layers { margin: 0 var(--m) 120px; }
.layers svg { display: block; width: 100%; height: auto; overflow: visible; }
.layers text, .range text, .pframe text { font: 400 13px var(--ja); fill: var(--ink); }
.range text.g { fill: var(--mute); font-size: 12px; }
.layers figcaption { margin-top: 12px; font-size: 12px; color: var(--mute); }
.proc { border-top: 1px solid var(--line); padding-bottom: 120px; }
.proc__head { padding: 120px var(--m) 0; }
.legend { list-style: none; display: flex; flex-wrap: wrap; gap: 12px 32px; margin: 40px 0 24px; padding: 0; font-size: 12px; }
.proc .legend, .gantt { margin-left: var(--m); margin-right: var(--m); }
.legend li { display: flex; align-items: center; gap: 10px; }
.gantt { list-style: none; padding: 0; border-top: 1px solid var(--ink); }
.gantt__row { display: grid; grid-template-columns: 220px minmax(0, 1fr) 340px; column-gap: var(--g); align-items: center; min-height: 104px; border-bottom: 1px solid var(--line); }
.gantt__name { display: grid; grid-template-columns: 40px 1fr; margin: 0; font-weight: 600; }
.gantt__name .no { grid-row: span 2; }
.gantt__name .ja { font-size: 20px; line-height: 1.3; }
.gantt__name .en { font: 500 12px var(--en); letter-spacing: .12em; }
.gantt__track { position: relative; height: 104px; }
.gantt__bar { position: absolute; top: 47px; height: 10px; overflow: visible; }
.gantt__sup { position: absolute; top: 34px; border-top: 1px solid var(--ink); }
.gantt__sup span { position: absolute; right: 0; top: -24px; font-size: 12px; white-space: nowrap; }
.gantt__body { margin: 0; padding: 16px 0; font-size: 14px; }
.areas4 { padding: 120px var(--m); border-top: 1px solid var(--line); display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--g); row-gap: 48px; }
.areas4 header { grid-column: 1 / 8; }
.areas4--sv { padding-top: 0; border-top: 0; }
.cells { grid-column: 1 / -1; list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--ink); }
.cells > li { position: relative; display: grid; gap: 4px; padding: 28px 24px 96px; border-right: 1px solid var(--line); }
.cells > li:first-child { padding-left: 0; }
.cells > li:last-child { border-right: 0; }
.cells__ja { font-size: 24px; font-weight: 600; }
.cells__en { font: 500 12px var(--en); letter-spacing: .12em; color: var(--mute); }
.door { height: auto; min-height: 0; background: var(--paper); color: var(--ink); border-top: 1px solid var(--line); }
.door__cut { position: relative; display: block; height: 40px; margin: 64px var(--m) 0; }
.door__cut svg { width: 100%; height: 100%; display: block; }
.door__cut .sym { position: absolute; top: 20px; transform: translateY(-50%); background: var(--paper); padding: 0 8px; }
.door__cut .sym:first-of-type { left: 0; }
.door__cut .sym:last-of-type { right: 0; }
.door__text { position: relative; inset: auto; padding: 48px var(--m) 120px; }
.abq, .svp, .cta2 { background: var(--paper); color: var(--ink); border-top: 1px solid var(--line); }
.range, .pframe { margin: 0; align-self: center; }
.range svg, .pframe svg { width: 100%; height: auto; display: block; }
.wk4 { min-height: 70vh; padding: 160px var(--m) 120px; background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px); background-size: 80px 80px; }
.wk4 h1 { font-size: clamp(36px, 4.4vw, 64px); margin-top: 16px; }
.foot__rev { grid-column: 1 / -1; margin: 0; }
@media (max-width: 1099px) {
  .gantt__row { grid-template-columns: 180px minmax(0, 1fr); }
  .gantt__body { grid-column: 1 / -1; padding-top: 0; }
}
@media (max-width: 767px) {
  .hero__copy, .hscope { grid-column: 1 / -1; }
  .hero__copy { padding-bottom: 32px; }
  .hscope { margin: 0 0 64px; }
  .axis:nth-of-type(2) { display: none; }
  .layers { margin-bottom: 72px; }
  .layers text { font-size: 26px; }
  .layers text.s { font-size: 22px; }
  .proc__head { padding-top: 72px; }
  .gantt__row { grid-template-columns: 1fr; row-gap: 4px; padding: 16px 0; }
  .gantt__track { height: 48px; }
  .gantt__bar { top: 19px; }
  .gantt__sup { top: 10px; }
  .areas4 { padding: 72px var(--m); grid-template-columns: 1fr; }
  .areas4 header { grid-column: 1 / -1; }
  .cells { grid-template-columns: 1fr; }
  .cells > li { padding: 20px 0 32px; border-right: 0; border-bottom: 1px solid var(--line); }
  .door__cut { margin-top: 40px; }
  .door__text { padding-bottom: 72px; }
  .wk4 { padding: 96px var(--m) 72px; background-size: 60px 60px; }
}
@media print { .hero__fx, .axis { display: none; } }
.areas4 h2, .proc__head h2 { font-size: clamp(36px, 4.4vw, 64px); line-height: 1.25; }
.areas4 .lead { margin-top: 24px; max-width: 640px; }
.pframe svg, .range svg { overflow: visible; }
/* GPT 審美（11/06）: 右の範囲表を強める、領域の区画に扱う案件の種類を置く */
.hscope { font-size: 15px; }
@media (min-width: 768px) { .hscope { margin-bottom: 18vh; } .cells > li { padding-bottom: 48px; } }
.hscope dt { font-size: 12px; }
.cells__tags { list-style: none; margin: 24px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.cells__tags li { font-size: 13px; padding: 4px 12px; border: 1px solid var(--line); border-radius: 999px; }
.gantt__body { font-size: 15px; }
/* editor（11/06）: 範囲図の注記、SERVICE の工程表 */
.range figcaption { margin-top: 12px; font-size: 13px; color: var(--mute); text-align: center; }
.svp .legend, .svp .gantt { margin-left: 0; margin-right: 0; }
.hscope div { grid-template-columns: 88px 1fr; }
/* tester（11/06）: 図の文字は 12px 以上、320px の重なり、静止時の方眼、補助線の太さ */
.axis text, .layers text.s { font-size: 12px; }
.layers .layers__tall { display: none; }
.layers text { font-size: 16px; }
.layers__tall text { font-size: 26px; }
.range text { font-size: 15px; }
.range text.g { font-size: 14px; }
.pframe text { font-size: 15px; }
.gantt__sup { border-top-width: 2px; }
.hero::before { background-image: linear-gradient(#DADAD4 1px, transparent 1px), linear-gradient(90deg, #DADAD4 1px, transparent 1px); -webkit-mask-image: radial-gradient(140% 110% at 0% 100%, #000 30%, transparent 80%); mask-image: radial-gradient(140% 110% at 0% 100%, #000 30%, transparent 80%); }
@media (max-width: 1023px) { .layers .layers__wide { display: none; } .layers .layers__tall { display: block; } .range { padding: 0 var(--m); } }
@media (max-width: 767px) {
  .range text { font-size: 26px; }
  .range text.g { font-size: 24px; }
  .pframe text { font-size: 28px; }
  .gantt__track { height: 64px; }
  .gantt__sup { top: 34px; }
  .gantt__sup span { right: auto; left: 0; top: -26px; }
  .gantt__bar { top: 44px; }
  .band__en { font-size: clamp(48px, 15vw, 64px); }
}
.layers .layers__wide text.s { font-size: 16px; }
@media (max-width: 767px) { .range text, .range text.g { font-size: 28px; } }

/* v4 社名の由来（ABOUT #origin） */
.org { padding: 160px var(--m); display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--g); row-gap: 48px; background: var(--paper); color: var(--ink); border-top: 1px solid var(--line); }
.org .lb { grid-column: 1 / span 2; padding-top: 16px; }
.org h2 { grid-column: 3 / -1; font-size: clamp(40px, 5.6vw, 88px); line-height: 1.2; }
.org__text { grid-column: 7 / -1; }
.org__text p { margin: 0 0 1.6em; line-height: 2; }
.org__text p:last-child { margin-bottom: 0; }
.org__fig { grid-column: 1 / -1; margin: 32px 0 0; display: grid; grid-template-columns: 1fr 1fr; column-gap: var(--g); row-gap: 24px; }
.org__fig svg { width: 100%; height: auto; display: block; overflow: visible; }
.org__fig text { font: 400 20px var(--ja); fill: var(--ink); }
.org__fig text.g { fill: var(--mute); }
.org__fig figcaption { grid-column: 1 / -1; font-size: 13px; color: var(--mute); }
.mani .tl { margin-top: 32px; }
@media (max-width: 1023px) {
  .org { padding: 96px var(--m); }
  .org .lb, .org h2, .org__text { grid-column: 1 / -1; }
  .org__fig { grid-template-columns: 1fr; }
  .org__fig text { font-size: 24px; }
}

/* v6（§1-27）見出しの3種別: キャッチ／説明（.h-ex）／業務情報（.h-biz）。差は寸法と余白だけ */
.hero__ja { font-size: clamp(44px, 6.4vw, 104px); line-height: 1.2; font-weight: 600; letter-spacing: .01em; word-break: auto-phrase; text-wrap: balance; max-width: 12em; }
.hero__copy .hero__lead { margin-top: 32px; font-size: 17px; max-width: 560px; }
.h-ex { font-size: clamp(28px, 3vw, 44px) !important; line-height: 1.35 !important; font-weight: 500; }
.h-biz { font-size: 24px !important; line-height: 1.4 !important; font-weight: 500; }
.abh--catch h1 { font-size: clamp(36px, 4.4vw, 64px); line-height: 1.25; font-weight: 600; }
.abh--catch .lead + .lead { margin-top: 1em; }
.abr__item h3 { font-size: 32px; }
.cells__t { margin: 16px 0 0; font-size: 15px; line-height: 1.8; }
.door__note { display: block; margin-top: 12px; font-size: 16px; line-height: 1.7; color: var(--ink); }
.grp { padding: 96px var(--m); display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--g); border-top: 1px solid var(--line); background: var(--paper); }
.grp h2 { grid-column: 1 / span 5; }
.grp__body { grid-column: 7 / -1; font-size: 15px; line-height: 1.9; }
.grp__body p { margin: 0 0 24px; }
.grp__body p:last-child { margin: 24px 0 0; }
.tb--grp dt { font: 500 14px var(--en); letter-spacing: .06em; }
.tb--grp .is-self dd { font-weight: 600; }
.tb__note { display: block; margin-top: 6px; font-size: 13px; color: var(--mute); line-height: 1.7; }
.org--v6 { padding: 96px var(--m); }
.org--v6 h2 { grid-column: 1 / span 5; }
.org--v6 .org__text { grid-column: 7 / -1; }
.org--v6 .org__fig { grid-column: 7 / -1; max-width: 720px; margin-top: 8px; }
.org--v6 .org__fig text { font-size: 22px; }
.foot__grp { margin-top: 8px; font-size: 12px; }
.foot__grp a { color: inherit; }
.wk4 h1 { font-size: clamp(28px, 3.4vw, 48px); }
.wk4__links { display: flex; flex-wrap: wrap; gap: 8px 32px; margin-top: 16px; }
.areas4 > header .h-ex { margin-bottom: 8px; }
@media (max-width: 1023px) {
  .hero__ja { font-size: clamp(36px, 10vw, 56px); }
  .h-ex { font-size: 26px !important; }
  .h-biz { font-size: 22px !important; }
  .abh--catch h1 { font-size: 32px; }
  .grp h2, .grp__body, .org--v6 h2, .org--v6 .org__text, .org--v6 .org__fig { grid-column: 1 / -1; }
  .grp h2 { margin-bottom: 24px; }
  .org--v6 .org__fig text { font-size: 26px; }
  .abr__item h3 { font-size: 26px; }
}
.door__text .door__h { grid-column: 1; font-size: clamp(28px, 3vw, 44px); }
.door__text .door__note { grid-column: 1; max-width: 40em; }
.door__text > .ring { grid-column: 2; grid-row: 2 / span 2; align-self: end; }
.abr > header .lead { margin-top: 24px; }

/* v7（§1-31 GPT の文章をそのまま使う） */
.hero__eyebrow { font: 500 13px var(--en); letter-spacing: .14em; margin-bottom: 24px; }
.hero__ja { max-width: none; }
.hero__copy .hero__lead p, .mani .lead p, .role7__body p, .ct7__body p { margin: 0; }
.hero__copy .hero__lead { max-width: 640px; line-height: 1.9; }
.mani .lead { line-height: 2; }
.cells--v6 .cells__en { order: -1; margin-bottom: 8px; }
.cells--v6 .cells__ja { font-size: 20px; }
.role7, .ct7 { padding: 120px var(--m); display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--g); row-gap: 24px; border-top: 1px solid var(--line); background: var(--paper); }
.role7 .lb, .ct7 .lb { grid-column: 1 / -1; }
.role7 h2, .ct7 h2 { grid-column: 1 / span 6; }
.role7__body, .ct7__body { grid-column: 7 / -1; font-size: 16px; line-height: 2; align-self: end; }
.ct7 .cta { grid-column: 7 / -1; justify-self: start; margin-top: 16px; }
@media (max-width: 1023px) {
  .role7, .ct7 { padding: 80px var(--m); }
  .role7 h2, .ct7 h2, .role7__body, .ct7__body, .ct7 .cta { grid-column: 1 / -1; }
}

/* ABOUT の箱舟（WebGL、§1-36）。WebGL が動いたら線画を出し、動かなければ SVG の断面を出す */
.org--v6 .ark { grid-column: 1 / -1; margin: 48px 0 0; }
.ark__stage { position: relative; width: 100%; aspect-ratio: 2.4 / 1; display: none; touch-action: pan-y; cursor: grab; }
.ark__stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.ark__lab { pointer-events: none; }
.ark.is-gl .ark__stage { display: block; }
.ark.is-gl .ark__fallback { display: none; }
.ark figcaption { margin-top: 12px; font-size: 13px; color: var(--mute); }
.ark:not(.is-gl) > figcaption { display: none; }
.ark__fallback .org__fig { max-width: 720px; }
@media (max-width: 767px) { .ark__stage { aspect-ratio: 1.5 / 1; } }

/* v8 生成の写真と動画（§1-35）。彩度を落として白地に馴染ませ、方眼は上に重ねる */
.hero__vid { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; filter: saturate(.45) contrast(.94) brightness(1.03); opacity: .7; z-index: 0; }
.hero__veil { position: absolute; inset: 0; z-index: 0; background: linear-gradient(90deg, rgba(243,243,240,.92) 0%, rgba(243,243,240,.7) 38%, rgba(243,243,240,.12) 70%, rgba(243,243,240,0) 100%); pointer-events: none; }
.hero__note { position: absolute; right: var(--m); top: 72px; z-index: 2; font: 500 11px var(--en); letter-spacing: .12em; color: var(--mute); }
.hero__copy, .hscope { position: relative; z-index: 1; }
.hero .hero__fx, .hero .sheetno, .hero .axis { z-index: 1; }
.hero .hero__fx { position: absolute; }
.gimg { margin: 0; position: relative; }
.gimg img { display: block; width: 100%; height: auto; filter: saturate(.4) contrast(.95); }
.gimg figcaption { margin-top: 8px; font: 500 10px var(--en); letter-spacing: .12em; color: var(--mute); }
.gimg--cell { margin-bottom: 20px; }
.gimg--cell img { aspect-ratio: 4 / 3; object-fit: cover; }
.abimg { padding: 0 var(--m) 96px; background: var(--paper); }
.gimg--wide img { aspect-ratio: 3 / 2; object-fit: cover; }
@media (min-width: 1024px) { .abimg .gimg { width: 58%; margin-left: auto; } }
@media (max-width: 1023px) { .hero__veil { background: linear-gradient(0deg, rgba(243,243,240,.94) 0%, rgba(243,243,240,.75) 45%, rgba(243,243,240,.2) 100%); } .hero__note { top: 64px; } }
.foot__photo { grid-column: 1 / -1; margin-top: 16px; font-size: 12px; color: var(--mute); }
.hero__note, .gimg figcaption { font-size: 12px; letter-spacing: .06em; }
.hero__note { top: auto; bottom: 20px; right: auto; left: var(--m); } @media (min-width: 1024px) { .hero__note { left: auto; right: calc(var(--m) + 120px); } }

@media print { .crumb { mix-blend-mode: normal; color: #0E1110; } }
.hero__copy .hero__lead p { word-break: keep-all; overflow-wrap: anywhere; }