:root {
  --ink: #191816;
  --ink-soft: #2c2a26;
  --ivory: #f3eee3;
  --ivory-light: #faf6ed;
  --paper: #e7dfd0;
  --red: #bd382b;
  --red-dark: #8f271e;
  --line: rgba(25, 24, 22, .2);
  --pad: clamp(1.25rem, 4vw, 4.75rem);
  --display: "Arial Narrow", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --body: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
section[id] { scroll-margin-top: 68px; }
body {
  margin: 0;
  color: var(--ink);
  background-color: var(--ivory);
  background-image:
    radial-gradient(circle at 18% 22%, rgba(62, 50, 39, .035) 0 1px, transparent 1.2px),
    radial-gradient(circle at 81% 63%, rgba(62, 50, 39, .025) 0 1px, transparent 1.2px);
  background-size: 19px 19px, 23px 23px;
  font-family: var(--body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

button, a { font: inherit; }
a { color: inherit; text-decoration: none; }
button { color: inherit; }
::selection { color: var(--ivory-light); background: var(--red); }
:focus-visible { outline: 2px solid var(--red); outline-offset: 4px; }
.wrap { width: min(100%, 1440px); margin-inline: auto; padding-inline: var(--pad); }
.skip-link {
  position: fixed;
  z-index: 1000;
  top: .75rem;
  left: .75rem;
  transform: translateY(-160%);
  padding: .7rem 1rem;
  color: var(--ivory-light);
  background: var(--ink);
}
.skip-link:focus { transform: translateY(0); }
.meta {
  margin: 0;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .22em;
}

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  display: flex;
  width: 100%;
  height: 82px;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--pad);
  border-bottom: 1px solid rgba(243, 238, 227, .2);
  color: var(--ivory-light);
  transition: background-color .25s ease, color .25s ease, border-color .25s ease, height .25s ease;
}
.site-header.is-scrolled,
.site-header.menu-open {
  height: 68px;
  color: var(--ink);
  background: rgba(243, 238, 227, .94);
  border-color: var(--line);
  backdrop-filter: blur(14px);
}
.brand { display: inline-flex; align-items: center; gap: .8rem; font-weight: 800; letter-spacing: .12em; }
.brand-mark { display: flex; width: 32px; height: 32px; align-items: flex-end; gap: 3px; padding: 6px; border: 1px solid currentColor; }
.brand-mark i { display: block; width: 5px; background: currentColor; }
.brand-mark i:nth-child(1) { height: 45%; }
.brand-mark i:nth-child(2) { height: 100%; background: var(--red); }
.brand-mark i:nth-child(3) { height: 70%; }
.brand-name { font-size: .92rem; }
.desktop-nav { display: flex; align-items: center; gap: clamp(1.4rem, 3vw, 3.25rem); font-size: .82rem; font-weight: 600; }
.desktop-nav > a:not(.nav-cta) { position: relative; padding: .5rem 0; }
.desktop-nav > a:not(.nav-cta)::after { content: ""; position: absolute; bottom: 0; left: 0; width: 100%; height: 1px; background: currentColor; transform: scaleX(0); transform-origin: right; transition: transform .25s ease; }
.desktop-nav > a:hover::after { transform: scaleX(1); transform-origin: left; }
.nav-cta { padding: .65rem 1rem; border: 1px solid currentColor; }
.menu-button, .mobile-nav { display: none; }

.hero { display: grid; min-height: 100svh; grid-template-columns: minmax(0, .94fr) minmax(0, 1.06fr); background: var(--ink); }
.hero-copy { position: relative; display: flex; min-height: 760px; flex-direction: column; justify-content: center; padding: 130px var(--pad) 80px; color: var(--ivory-light); }
.hero-copy::after { content: ""; position: absolute; top: 82px; right: 0; bottom: 0; width: 1px; background: rgba(243, 238, 227, .18); }
.hero-copy h1 { margin: 1.8rem 0 2rem; font-family: var(--display); font-size: clamp(3.25rem, 5.2vw, 6.2rem); font-stretch: condensed; font-weight: 900; letter-spacing: -.075em; line-height: .96; }
.hero-copy h1 em { color: var(--red); font-style: normal; }
.hero-intro { max-width: 34rem; margin: 0; color: rgba(250, 246, 237, .68); font-size: clamp(.98rem, 1.35vw, 1.15rem); }
.hero-actions { display: flex; align-items: center; gap: 2rem; margin-top: 2.8rem; }
.button { display: inline-flex; min-height: 54px; align-items: center; justify-content: space-between; gap: 2.5rem; padding: .8rem 1.15rem; font-size: .86rem; font-weight: 700; transition: transform .25s ease, background-color .25s ease, color .25s ease; }
.button:hover { transform: translateY(-3px); }
.button-primary { min-width: 174px; color: var(--ivory-light); background: var(--red); }
.button-primary:hover { background: #d04434; }
.text-link { display: inline-flex; align-items: center; gap: .9rem; padding: .7rem 0; border-bottom: 1px solid rgba(250, 246, 237, .32); color: rgba(250, 246, 237, .8); font-size: .82rem; }
.hero-index { position: absolute; bottom: 2.4rem; left: var(--pad); color: rgba(250, 246, 237, .34); font-size: .68rem; letter-spacing: .18em; }
.hero-visual { position: relative; min-height: 760px; overflow: hidden; background: #b6362a; }
.hero-visual::before { content: ""; position: absolute; inset: 0; opacity: .3; background: repeating-linear-gradient(90deg, transparent 0, transparent calc(25% - 1px), rgba(255,255,255,.13) 25%); }
.hero-art { position: absolute; inset: 8% 4% 3%; width: 92%; height: 89%; }
.visual-caption { position: absolute; z-index: 2; top: 110px; left: 3.5rem; color: var(--ivory-light); }
.visual-note { position: absolute; z-index: 2; right: 2.5rem; bottom: 2.4rem; display: flex; gap: 1rem; color: rgba(250, 246, 237, .7); font-size: .68rem; letter-spacing: .12em; writing-mode: vertical-rl; }

.manifesto { overflow: hidden; border-bottom: 1px solid var(--line); }
.marquee { padding: 1rem 0; overflow: hidden; border-bottom: 1px solid var(--line); white-space: nowrap; }
.marquee-track { display: flex; width: max-content; align-items: center; animation: drift 32s linear infinite; }
.marquee span { padding-inline: 2rem; font-family: var(--display); font-size: clamp(1.4rem, 2.5vw, 2.5rem); font-weight: 900; letter-spacing: -.04em; }
.marquee i { width: 8px; height: 8px; border-radius: 50%; background: var(--red); }
@keyframes drift { to { transform: translateX(-50%); } }
.manifesto-grid { display: grid; min-height: 570px; grid-template-columns: .7fr 2.2fr .8fr; align-items: start; gap: clamp(2rem, 5vw, 5rem); padding-top: 8rem; padding-bottom: 8rem; }
.section-no { padding-top: .55rem; }
blockquote { margin: 0; font-family: var(--display); font-size: clamp(2.35rem, 4.4vw, 5.3rem); font-weight: 900; letter-spacing: -.065em; line-height: 1.18; }
blockquote span, .section-heading h2 span, .story-copy h2 span { color: var(--red); }
.side-copy { max-width: 19rem; margin: 0; padding-left: 1.3rem; border-left: 2px solid var(--red); color: rgba(25, 24, 22, .72); font-size: .9rem; }

.story-section { display: grid; min-height: 760px; grid-template-columns: 1fr 1fr; border-bottom: 1px solid var(--line); }
.story-dark { color: var(--ivory-light); background: var(--ink); }
.story-light { background: var(--ivory-light); }
.story-copy { display: flex; flex-direction: column; justify-content: space-between; padding: clamp(5rem, 9vw, 9rem) var(--pad); }
.story-copy h2 { margin: 1.5rem 0 0; font-family: var(--display); font-size: clamp(2.5rem, 4.7vw, 5.7rem); font-weight: 900; letter-spacing: -.07em; line-height: 1.05; }
.story-bottom > p { max-width: 33rem; margin: 0 0 2rem; opacity: .68; }
.tag-list { display: flex; flex-wrap: wrap; gap: .65rem; margin: 0; padding: 0; list-style: none; }
.tag-list li { padding: .55rem .8rem; border: 1px solid currentColor; font-size: .72rem; opacity: .8; }
.story-visual { position: relative; min-height: 700px; overflow: hidden; }
.brand-system { border-left: 1px solid rgba(243, 238, 227, .18); background-color: #24221f; background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px); background-size: 12.5% 12.5%; }
.orbit { position: absolute; top: 50%; left: 50%; border: 1px solid rgba(243, 238, 227, .28); border-radius: 50%; transform: translate(-50%, -50%); }
.orbit-one { width: 62%; aspect-ratio: 1; }
.orbit-two { width: 85%; aspect-ratio: 1; border-style: dashed; }
.core-disc { position: absolute; top: 50%; left: 50%; display: grid; width: min(30vw, 330px); aspect-ratio: 1; place-items: center; border-radius: 50%; background: var(--red); box-shadow: 0 0 0 18px rgba(189, 56, 43, .13); transform: translate(-50%, -50%); }
.core-disc span { font-family: var(--display); font-size: clamp(5rem, 10vw, 10rem); font-weight: 900; }
.specimen { position: absolute; width: 72px; height: 108px; border: 1px solid rgba(243,238,227,.46); background: var(--ink); box-shadow: 12px 12px 0 rgba(189,56,43,.45); }
.specimen::before { content: ""; position: absolute; inset: 12px; border-top: 12px solid var(--ivory); border-bottom: 1px solid var(--ivory); opacity: .62; }
.specimen-a { top: 15%; left: 12%; transform: rotate(-8deg); }
.specimen-b { right: 12%; bottom: 12%; transform: rotate(10deg); }
.measure-line { position: absolute; height: 1px; background: rgba(243,238,227,.35); }
.measure-one { top: 25%; right: 0; width: 29%; }
.measure-two { bottom: 23%; left: 0; width: 25%; }
.diagram-label { position: absolute; font-size: .68rem; letter-spacing: .25em; opacity: .58; }
.label-a { top: 20%; right: 8%; }
.label-b { bottom: 13%; left: 11%; }
.label-c { top: 51%; right: 9%; }
.operation-board { order: 0; min-height: 700px; border-right: 1px solid var(--line); background: #e3d8c6; }
.operation-board::after { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 75% 10%, rgba(255,255,255,.7), transparent 35%); pointer-events: none; }
.board-head { position: absolute; top: 9%; left: 9%; display: flex; gap: 8px; }
.board-head span { width: 8px; height: 8px; border-radius: 50%; background: var(--ink); opacity: .35; }
.board-head span:first-child { background: var(--red); opacity: 1; }
.board-grid { position: absolute; inset: 16% 9% 12%; display: grid; grid-template-columns: repeat(4,1fr); grid-template-rows: repeat(3,1fr); border-top: 1px solid rgba(25,24,22,.15); border-left: 1px solid rgba(25,24,22,.15); }
.board-grid i { border-right: 1px solid rgba(25,24,22,.15); border-bottom: 1px solid rgba(25,24,22,.15); }
.chart-line { position: absolute; z-index: 2; right: 7%; bottom: 18%; left: 7%; color: var(--red); }
.chart-line svg { width: 100%; height: 170px; overflow: visible; }
.board-card { position: absolute; z-index: 3; width: 152px; height: 194px; padding: 22px; background: var(--ivory-light); box-shadow: 14px 18px 50px rgba(25,24,22,.14); transform: rotate(-3deg); }
.board-card span { display: block; width: 52px; height: 52px; margin-bottom: 38px; border-radius: 50%; background: var(--red); }
.board-card i { display: block; height: 3px; margin-top: 14px; background: var(--ink); opacity: .65; }
.board-card i:last-child { width: 60%; }
.card-one { top: 17%; left: 14%; }
.card-two { top: 30%; right: 13%; transform: rotate(5deg) scale(.8); }
.card-two span { border-radius: 0; background: var(--ink); }

.services { padding-top: clamp(6rem, 10vw, 10rem); padding-bottom: clamp(6rem, 10vw, 10rem); }
.section-heading { display: grid; grid-template-columns: 2fr .7fr; gap: 3rem; align-items: end; margin-bottom: 6rem; }
.section-heading h2 { margin: 1.5rem 0 0; font-family: var(--display); font-size: clamp(2.65rem, 5.2vw, 6.1rem); font-weight: 900; letter-spacing: -.075em; line-height: 1; }
.section-heading > p { max-width: 25rem; margin: 0 0 .5rem; padding-left: 1.3rem; border-left: 2px solid var(--red); color: rgba(25,24,22,.65); }
.service-list { border-top: 1px solid var(--ink); }
.service-item { position: relative; display: grid; min-height: 180px; grid-template-columns: .4fr 1.8fr .5fr; align-items: center; gap: 2rem; border-bottom: 1px solid var(--line); transition: padding .28s ease, color .28s ease, background-color .28s ease; }
.service-item::before { content: ""; position: absolute; inset: 0; z-index: -1; background: var(--ink); transform: scaleY(0); transform-origin: bottom; transition: transform .3s ease; }
.service-item:hover { padding-inline: 1.5rem; color: var(--ivory-light); }
.service-item:hover::before { transform: scaleY(1); }
.service-number { align-self: start; padding-top: 2.6rem; font-size: .68rem; font-weight: 700; letter-spacing: .18em; }
.service-item h3 { margin: 0 0 .4rem; font-family: var(--display); font-size: clamp(1.8rem, 3vw, 3.2rem); letter-spacing: -.05em; }
.service-item p { max-width: 38rem; margin: 0; opacity: .62; }
.service-symbol { justify-self: end; font-family: serif; font-size: clamp(3rem, 6vw, 6.4rem); font-weight: 900; color: var(--red); opacity: .72; }

.process { padding: clamp(6rem, 10vw, 10rem) 0; color: var(--ivory-light); background: var(--red-dark); }
.process-inner { display: grid; grid-template-columns: .85fr 1.3fr; gap: clamp(4rem, 10vw, 10rem); }
.process-intro { position: sticky; top: 130px; align-self: start; }
.process-intro h2 { margin: 1.7rem 0; font-family: var(--display); font-size: clamp(3.25rem, 6vw, 7rem); font-weight: 900; letter-spacing: -.075em; line-height: .94; }
.process-intro > p:last-child { max-width: 24rem; color: rgba(250,246,237,.68); }
.process-list { margin: 0; padding: 0; border-top: 1px solid rgba(250,246,237,.4); list-style: none; }
.process-list li { display: grid; grid-template-columns: .28fr 1fr; gap: 2rem; padding: 2.8rem 0 3.5rem; border-bottom: 1px solid rgba(250,246,237,.24); }
.process-list li > span { padding-top: .5rem; color: rgba(250,246,237,.5); font-size: .68rem; letter-spacing: .2em; }
.process-list h3 { margin: 0 0 .55rem; font-family: var(--display); font-size: clamp(2rem, 3.2vw, 3.8rem); letter-spacing: -.05em; }
.process-list p { max-width: 33rem; margin: 0; color: rgba(250,246,237,.68); }

.closing { position: relative; min-height: 790px; overflow: hidden; color: var(--ivory-light); background: var(--ink); }
.closing::before { content: ""; position: absolute; inset: 0; opacity: .15; background-image: linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px); background-size: 8vw 8vw; }
.closing-shape { position: absolute; top: 50%; right: -8vw; width: min(46vw, 650px); aspect-ratio: 1; border: clamp(45px, 7vw, 100px) solid var(--red); border-radius: 50%; transform: translateY(-50%); }
.closing-shape::before { content: ""; position: absolute; inset: 18%; border: 1px solid var(--ivory-light); border-radius: 50%; opacity: .35; }
.closing-content { position: relative; z-index: 2; display: flex; min-height: 790px; flex-direction: column; align-items: flex-start; justify-content: center; }
.closing h2 { margin: 1.6rem 0 2rem; font-family: var(--display); font-size: clamp(3.2rem, 7vw, 8rem); font-weight: 900; letter-spacing: -.08em; line-height: .92; }
.closing h2 span { color: var(--red); }
.closing-content > p:not(.meta) { max-width: 34rem; margin: 0 0 2.3rem; color: rgba(250,246,237,.67); }
.button-light { min-width: 174px; color: var(--ink); background: var(--ivory-light); }
.button-light:hover { color: var(--ivory-light); background: var(--red); }
.closing-word { position: absolute; right: var(--pad); bottom: -5vw; font-family: var(--display); font-size: clamp(8rem, 19vw, 20rem); font-weight: 900; letter-spacing: -.1em; opacity: .035; white-space: nowrap; }

.reveal { opacity: 1; transform: none; }
.js-enabled .reveal { opacity: 0; transform: translateY(24px); transition: opacity .75s cubic-bezier(.2,.7,.2,1), transform .75s cubic-bezier(.2,.7,.2,1); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.hero .reveal:nth-child(2) { transition-delay: .08s; }
.hero .reveal:nth-child(3) { transition-delay: .16s; }
.hero .reveal:nth-child(4) { transition-delay: .24s; }

@media (max-width: 1040px) {
  .hero-copy h1 { font-size: clamp(3rem, 6vw, 5rem); }
  .manifesto-grid { grid-template-columns: .55fr 2fr; }
  .side-copy { grid-column: 2; max-width: 36rem; }
  .story-section { min-height: 680px; }
  .story-copy, .story-visual { min-height: 640px; }
  .section-heading { grid-template-columns: 1fr; }
  .section-heading > p { max-width: 36rem; }
}

@media (max-width: 760px) {
  :root { --pad: 1.25rem; }
  .site-header { height: 66px; }
  .site-header.is-scrolled, .site-header.menu-open { height: 66px; }
  .desktop-nav { display: none; }
  .menu-button { display: inline-flex; align-items: center; gap: .7rem; padding: .5rem 0; border: 0; background: transparent; cursor: pointer; }
  .menu-label { font-size: .76rem; font-weight: 700; }
  .menu-icon { position: relative; display: block; width: 24px; height: 15px; }
  .menu-icon i { position: absolute; right: 0; width: 24px; height: 1px; background: currentColor; transition: top .25s ease, transform .25s ease; }
  .menu-icon i:first-child { top: 3px; }
  .menu-icon i:last-child { top: 11px; }
  .menu-open .menu-icon i:first-child { top: 7px; transform: rotate(45deg); }
  .menu-open .menu-icon i:last-child { top: 7px; transform: rotate(-45deg); }
  .mobile-nav { position: fixed; top: 66px; right: 0; left: 0; display: flex; flex-direction: column; padding: 1.5rem var(--pad) 2rem; border-bottom: 1px solid var(--line); color: var(--ink); background: var(--ivory); }
  .mobile-nav[hidden] { display: none; }
  .mobile-nav a { display: flex; align-items: center; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--line); font-size: 1.15rem; font-weight: 700; }
  .mobile-nav a span { font-size: .62rem; opacity: .5; }
  .hero { min-height: auto; grid-template-columns: 1fr; }
  .hero-copy { min-height: 660px; padding-top: 118px; padding-bottom: 72px; }
  .hero-copy::after { display: none; }
  .hero-copy h1 { font-size: clamp(3rem, 14vw, 5.2rem); }
  .hero-intro { max-width: 29rem; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 1rem; }
  .hero-visual { min-height: 590px; }
  .visual-caption { top: 2rem; left: var(--pad); }
  .hero-art { inset: 7% -10% 0; width: 120%; height: 93%; }
  .visual-note { right: 1rem; bottom: 1.5rem; }
  .manifesto-grid { min-height: auto; grid-template-columns: 1fr; gap: 2.5rem; padding-top: 5rem; padding-bottom: 5rem; }
  .side-copy { grid-column: auto; }
  .story-section { grid-template-columns: 1fr; }
  .story-copy { min-height: 650px; padding-top: 5rem; padding-bottom: 4rem; }
  .story-visual { min-height: 560px; }
  .brand-system { border-top: 1px solid rgba(243,238,227,.18); border-left: 0; }
  .operation-board { order: 2; min-height: 550px; border-top: 1px solid var(--line); border-right: 0; }
  .core-disc { width: 52vw; }
  .section-heading { margin-bottom: 3.5rem; }
  .services { padding-block: 5.5rem; }
  .service-item { grid-template-columns: .22fr 1fr; gap: 1rem; padding: 1.8rem 0; }
  .service-item:hover { padding-inline: .65rem; }
  .service-number { padding-top: .55rem; }
  .service-symbol { display: none; }
  .process-inner { grid-template-columns: 1fr; gap: 3rem; }
  .process-intro { position: static; }
  .closing { min-height: 680px; }
  .closing-content { min-height: 680px; }
  .closing-shape { top: auto; right: -35vw; bottom: -8vw; width: 86vw; transform: none; opacity: .65; }
}

@media (max-width: 420px) {
  .brand-name { font-size: .82rem; }
  .hero-copy { min-height: 620px; }
  .hero-copy h1 { font-size: 2.9rem; }
  .button { width: 100%; }
  .hero-visual { min-height: 500px; }
  .story-copy { min-height: 600px; }
  .story-visual { min-height: 480px; }
  .board-card { width: 124px; height: 164px; }
  .board-card span { width: 42px; height: 42px; margin-bottom: 29px; }
  .service-item { grid-template-columns: 1fr; }
  .service-number { padding: 0; }
  .process-list li { grid-template-columns: .18fr 1fr; gap: 1rem; }
}

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