:root {
  --navy: #071726;
  --deep: #03101b;
  --deep-2: #020b12;
  --sulfur: #f2c318;
  --warm: #f4f1e8;
  --paper: #ebe8df;
  --steel: #8d9aa5;
  --line-dark: rgba(3, 16, 27, .17);
  --line-light: rgba(244, 241, 232, .18);
  --max: 1280px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 82px; }
body { margin: 0; color: var(--deep); background: var(--warm); font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif; line-height: 1.65; }
body.nav-locked { overflow: hidden; }
img { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
address { font-style: normal; }
::selection { color: var(--deep); background: var(--sulfur); }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 999; left: 16px; top: -80px; padding: 12px 18px; color: var(--deep); background: var(--sulfur); transition: top .2s; }
.skip-link:focus { top: 12px; }
:focus-visible { outline: 3px solid var(--sulfur); outline-offset: 4px; }

.site-header { position: fixed; z-index: 80; inset: 0 0 auto; height: 80px; display: flex; align-items: center; justify-content: space-between; padding: 0 max(26px, calc((100vw - var(--max)) / 2)); color: var(--warm); border-bottom: 1px solid rgba(244,241,232,.22); transition: background .25s, height .25s; }
.site-header.scrolled, .site-header.menu-open { height: 70px; background: rgba(3,16,27,.94); backdrop-filter: blur(12px); }
.brand { position: relative; z-index: 3; display: inline-flex; align-items: center; gap: 11px; min-height: 48px; }
.brand-mark { width: 40px; height: 40px; fill: none; stroke: var(--sulfur); stroke-width: 4.6; stroke-linecap: round; stroke-linejoin: round; }
.brand-type { display: grid; line-height: 1.12; }
.brand-type strong { font-size: 18px; letter-spacing: .08em; }
.brand-type small { color: rgba(244,241,232,.62); font-size: 8px; letter-spacing: .19em; }
.site-nav { display: flex; align-items: center; gap: clamp(22px, 2.4vw, 38px); font-size: 13px; letter-spacing: .07em; }
.site-nav a { position: relative; display: grid; place-items: center; min-height: 44px; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 4px; height: 1px; background: var(--sulfur); transition: right .22s; }
.site-nav a:hover::after, .site-nav a:focus-visible::after { right: 0; }
.site-nav .nav-contact { min-width: 102px; padding: 0 17px; color: var(--deep); background: var(--sulfur); }
.site-nav .nav-contact::after { display: none; }
.menu-toggle { display: none; }

.hero { position: relative; min-height: 760px; height: 100svh; color: var(--warm); overflow: hidden; background: var(--deep); }
.hero-media, .hero-shade, .hero-grid { position: absolute; inset: 0; height: 100%; object-fit: cover; }
.hero-media { object-position: center; }
.hero-shade { background: linear-gradient(90deg, rgba(2,11,18,.98) 0%, rgba(2,11,18,.88) 33%, rgba(2,11,18,.32) 69%, rgba(2,11,18,.13) 100%); }
.hero-grid { opacity: .22; background-image: linear-gradient(rgba(244,241,232,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(244,241,232,.08) 1px, transparent 1px); background-size: 8.333vw 8.333vw; mask-image: linear-gradient(90deg, #000, transparent 72%); }
.hero-content { position: relative; z-index: 2; width: min(var(--max), calc(100% - 52px)); height: 100%; margin: 0 auto; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; padding-top: 80px; }
.eyebrow, .kicker, .stage-label, .application-index { margin: 0 0 22px; font-family: Consolas, "SFMono-Regular", monospace; font-size: 11px; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; gap: 14px; color: rgba(244,241,232,.72); }
.eyebrow span { color: var(--sulfur); }
.eyebrow::after { content: ""; width: 70px; height: 1px; background: var(--sulfur); }
.hero h1 { max-width: 850px; margin: 0; font-size: clamp(55px, 5.7vw, 92px); line-height: 1.08; letter-spacing: -.055em; font-weight: 800; }
.hero h1 em { color: var(--sulfur); font-style: normal; }
.hero-lede { max-width: 590px; margin: 32px 0 0; color: rgba(244,241,232,.75); font-size: 17px; }
.hero-actions { display: flex; align-items: center; gap: 34px; margin-top: 42px; }
.button { min-height: 50px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid transparent; padding: 0 25px; font-weight: 700; letter-spacing: .04em; cursor: pointer; }
.button-primary { color: var(--deep); background: var(--sulfur); }
.button-primary:hover { background: #ffd62d; }
.text-link, .inline-link { display: inline-flex; align-items: center; gap: 11px; min-height: 44px; font-weight: 700; }
.text-link span, .inline-link span { color: var(--sulfur); transition: transform .2s; }
.text-link:hover span, .inline-link:hover span { transform: translate(4px,-2px); }
.hero-index { position: absolute; z-index: 2; right: max(26px, calc((100vw - var(--max)) / 2)); top: 49%; display: flex; align-items: center; gap: 12px; transform: rotate(90deg) translateX(50%); transform-origin: right center; color: rgba(244,241,232,.42); font: 9px/1 Consolas, monospace; letter-spacing: .18em; }
.hero-index i { width: 38px; height: 1px; background: rgba(244,241,232,.25); }
.scroll-cue { position: absolute; z-index: 2; left: 50%; bottom: 26px; display: flex; align-items: center; gap: 14px; transform: translateX(-50%); color: rgba(244,241,232,.6); font: 10px Consolas, monospace; letter-spacing: .17em; }
.scroll-cue i { width: 1px; height: 46px; background: linear-gradient(var(--sulfur) 50%, rgba(244,241,232,.22) 50%); background-size: 100% 200%; animation: scroll-line 1.8s linear infinite; }
@keyframes scroll-line { to { background-position: 0 -200%; } }

.overview { max-width: var(--max); margin: 0 auto; padding: 120px 0 110px; display: grid; grid-template-columns: 1fr 4fr 5fr; gap: 28px; border-bottom: 1px solid var(--line-dark); }
.section-number { font: 10px Consolas, monospace; letter-spacing: .18em; }
.kicker { color: #58656d; }
.kicker.light { color: var(--sulfur); }
.overview h2, .section-heading h2, .process-head h2, .responsibility h2, .about h2, .contact h2 { margin: 0; font-size: clamp(40px, 4.6vw, 70px); line-height: 1.08; letter-spacing: -.045em; }
.overview-facts { display: grid; grid-template-columns: repeat(3, 1fr); align-self: end; border-top: 2px solid var(--deep); }
.overview-facts div { min-height: 112px; padding: 20px 14px; border-right: 1px solid var(--line-dark); }
.overview-facts span { display: block; color: #59666e; font-size: 11px; }
.overview-facts strong { display: block; margin-top: 17px; font-size: 22px; line-height: 1.1; }
.overview-note { grid-column: 2 / 4; max-width: 820px; margin: 40px 0 0; font-size: 20px; }

.process { color: var(--warm); background: var(--navy); padding: 120px max(26px, calc((100vw - var(--max)) / 2)) 140px; overflow: hidden; }
.process-head { display: grid; grid-template-columns: 2fr 1fr; gap: 80px; padding-bottom: 90px; border-bottom: 1px solid var(--line-light); }
.process-head > p { align-self: end; max-width: 390px; margin: 0; color: rgba(244,241,232,.64); }
.process-flow { position: relative; }
.process-spine { position: absolute; z-index: 2; top: 0; bottom: 0; left: calc(8.333% - 1px); width: 2px; background: rgba(242,195,24,.28); }
.process-spine i { display: block; width: 2px; height: 38%; background: var(--sulfur); }
.flow-stage { position: relative; display: grid; grid-template-columns: 1fr 4fr 6fr; gap: 28px; align-items: center; min-height: 610px; padding: 78px 0; border-bottom: 1px solid var(--line-light); }
.stage-number { position: relative; z-index: 3; align-self: start; width: 44px; height: 44px; display: grid; place-items: center; color: var(--deep); background: var(--sulfur); border-radius: 50%; font: 11px Consolas, monospace; }
.stage-copy { max-width: 420px; }
.stage-copy h3 { margin: 0 0 23px; font-size: clamp(34px, 3.7vw, 58px); line-height: 1.08; letter-spacing: -.04em; }
.stage-copy > p:not(.stage-label) { color: rgba(244,241,232,.66); }
.stage-label { color: var(--sulfur); }
.inline-link { margin-top: 18px; font-size: 13px; }
.stage-visual { margin: 0; align-self: stretch; min-height: 440px; overflow: hidden; position: relative; }
.stage-visual img { height: 100%; object-fit: cover; }
.stage-visual figcaption, .application-image figcaption { position: absolute; right: 14px; bottom: 12px; padding: 6px 9px; color: rgba(244,241,232,.76); background: rgba(3,16,27,.7); font: 9px Consolas, monospace; letter-spacing: .12em; }
.stage-product .stage-visual { grid-column: 3; }
.stage-series { border-bottom: 0; }

.applications { max-width: var(--max); margin: 0 auto; padding: 120px 0 130px; }
.section-heading { display: grid; grid-template-columns: 1fr 5fr 3fr; gap: 28px; align-items: end; margin-bottom: 90px; }
.section-heading > p { max-width: 360px; margin: 0; color: #647078; }
.application-story { display: grid; grid-template-columns: 7fr 4fr; gap: 7.5%; align-items: center; min-height: 620px; border-top: 1px solid var(--line-dark); }
.application-story.reverse { grid-template-columns: 4fr 7fr; }
.application-story.reverse .application-image { order: 2; }
.application-image { position: relative; margin: 0; height: 480px; overflow: hidden; background: var(--deep); }
.application-image img { height: 100%; object-fit: cover; transition: transform .7s cubic-bezier(.2,.7,.2,1); }
.application-image:hover img { transform: scale(1.025); }
.application-copy { padding: 55px 0; }
.application-index { color: #59656d; }
.application-copy h3 { margin: 0 0 25px; font-size: clamp(42px, 5vw, 76px); line-height: .98; letter-spacing: -.05em; }
.application-copy > p:not(.application-index) { max-width: 450px; color: #53616a; }
.material-tag { display: inline-block; margin-top: 28px; padding-top: 8px; border-top: 2px solid var(--sulfur); font: 10px Consolas, monospace; letter-spacing: .16em; }
.application-list { display: grid; grid-template-columns: 1fr 3fr 5fr 1fr; gap: 28px; align-items: center; min-height: 122px; border-top: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.application-list > span { font: 11px Consolas, monospace; color: #5b6770; }
.application-list strong { font-size: 23px; }
.application-list p { color: #5d6870; }
.application-list a { font-weight: 700; }

.responsibility { position: relative; min-height: 820px; display: grid; align-items: center; color: var(--warm); overflow: hidden; background: var(--deep); }
.responsibility-media, .responsibility-overlay { position: absolute; inset: 0; height: 100%; object-fit: cover; }
.responsibility-overlay { background: linear-gradient(90deg, rgba(3,16,27,.97), rgba(3,16,27,.72) 52%, rgba(3,16,27,.16)); }
.responsibility-content { position: relative; z-index: 2; width: min(var(--max), calc(100% - 52px)); margin: 0 auto; }
.responsibility-content .section-number { margin-bottom: 50px; }
.responsibility-content > p:not(.kicker) { max-width: 620px; margin-top: 34px; color: rgba(244,241,232,.72); font-size: 17px; }
.responsibility-lines { width: min(820px, 100%); display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 58px; border-top: 1px solid rgba(244,241,232,.38); }
.responsibility-lines div { position: relative; padding: 25px 18px 18px 0; border-right: 1px solid rgba(244,241,232,.2); }
.responsibility-lines span { display: block; color: var(--sulfur); font: 10px Consolas, monospace; }
.responsibility-lines strong, .responsibility-lines small { display: block; }
.responsibility-lines strong { margin-top: 14px; font-size: 19px; }
.responsibility-lines small { margin-top: 5px; color: rgba(244,241,232,.54); }

.about { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: 2fr 9fr; gap: 28px; padding: 130px 0; }
.about-side { padding-top: 9px; }
.about-side .kicker { margin-top: 60px; writing-mode: vertical-rl; }
.about-main { padding-left: 7%; border-left: 1px solid var(--line-dark); }
.about-lead { max-width: 960px; margin: 40px 0 70px; font-size: clamp(24px, 2.4vw, 38px); line-height: 1.45; }
.about-detail { display: grid; grid-template-columns: 1fr 1.6fr; gap: 9%; border-top: 2px solid var(--deep); padding-top: 28px; }
.about-detail > p { margin: 0; color: #606c73; }
.about-detail dl { margin: 0; }
.about-detail dl div { display: grid; grid-template-columns: 130px 1fr; gap: 20px; padding: 15px 0; border-bottom: 1px solid var(--line-dark); }
.about-detail dt { color: #5a666e; font-size: 12px; }
.about-detail dd { margin: 0; font-weight: 700; }

.contact { display: grid; grid-template-columns: 1fr 1fr; min-height: 900px; color: var(--warm); background: var(--deep); }
.contact-visual { position: relative; overflow: hidden; }
.contact-visual::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(3,16,27,.7), transparent 60%); }
.contact-visual img { height: 100%; object-fit: cover; }
.contact-visual-label { position: absolute; z-index: 2; left: 40px; bottom: 36px; display: flex; gap: 18px; font: 10px Consolas, monospace; letter-spacing: .16em; }
.contact-visual-label span { color: var(--sulfur); }
.contact-panel { padding: 90px clamp(28px, 5vw, 90px); }
.contact-panel > p:not(.kicker) { max-width: 650px; color: rgba(244,241,232,.65); }
.contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 25px 20px; margin-top: 48px; }
.contact-form label { display: grid; gap: 8px; }
.contact-form label span { color: rgba(244,241,232,.63); font-size: 11px; }
.contact-form input, .contact-form textarea { width: 100%; color: var(--warm); background: transparent; border: 0; border-bottom: 1px solid rgba(244,241,232,.34); border-radius: 0; padding: 10px 2px; resize: vertical; }
.contact-form input:focus, .contact-form textarea:focus { outline: 0; border-bottom-color: var(--sulfur); }
.form-wide { grid-column: 1 / -1; }
.form-action { display: flex; align-items: center; gap: 20px; }
.form-status { margin: 0; color: var(--sulfur); font-size: 12px; }
.direct-contact { margin-top: 60px; border-top: 1px solid rgba(244,241,232,.25); }
.direct-contact > div { display: grid; grid-template-columns: 100px 1fr; gap: 20px; padding: 15px 0; border-bottom: 1px solid rgba(244,241,232,.15); }
.direct-contact span { color: rgba(244,241,232,.58); font-size: 11px; }
.direct-contact a:hover { color: var(--sulfur); }

.site-footer { display: grid; grid-template-columns: 1fr 1fr 1.3fr; gap: 30px; align-items: center; min-height: 150px; padding: 35px max(26px, calc((100vw - var(--max)) / 2)); color: rgba(244,241,232,.72); background: var(--deep-2); border-top: 1px solid rgba(244,241,232,.14); }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand .brand-mark { width: 34px; height: 34px; }
.footer-nav, .footer-meta { display: flex; gap: 25px; font-size: 11px; }
.footer-nav a:hover { color: var(--sulfur); }
.footer-meta { justify-content: flex-end; color: rgba(244,241,232,.58); }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity .75s ease, transform .75s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 1100px) {
  :root { --max: calc(100vw - 56px); }
  .overview { grid-template-columns: 1fr 5fr; }
  .overview-facts { grid-column: 2; margin-top: 40px; }
  .overview-note { grid-column: 2; }
  .flow-stage { grid-template-columns: 1fr 4fr 5fr; }
  .section-heading { grid-template-columns: 1fr 5fr; }
  .section-heading > p { grid-column: 2; margin-top: 25px; }
  .application-story { min-height: 550px; }
  .application-image { height: 410px; }
  .contact { grid-template-columns: 42% 58%; }
}

@media (max-width: 820px) {
  :root { --max: calc(100vw - 40px); }
  html { scroll-padding-top: 70px; }
  .site-header { height: 70px; padding: 0 20px; }
  .site-header.menu-open { background: transparent; border-bottom-color: transparent; backdrop-filter: none; }
  .brand-type strong { font-size: 16px; }
  .menu-toggle { position: relative; z-index: 3; width: 48px; height: 48px; display: grid; place-content: center; gap: 7px; color: var(--warm); background: transparent; border: 0; cursor: pointer; }
  .menu-toggle span:not(.sr-only) { display: block; width: 25px; height: 2px; background: currentColor; transition: transform .2s; }
  .menu-open .menu-toggle span:nth-last-child(2) { transform: translateY(4.5px) rotate(45deg); }
  .menu-open .menu-toggle span:last-child { transform: translateY(-4.5px) rotate(-45deg); }
  .site-nav { position: fixed; inset: 0; z-index: 2; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: 5px; padding: 100px 28px 40px; color: var(--warm); background: var(--deep); transform: translateX(100%); visibility: hidden; transition: transform .25s, visibility .25s; }
  .menu-open .site-nav { transform: translateX(0); visibility: visible; }
  .site-nav a { width: 100%; justify-items: start; min-height: 58px; font-size: 22px; border-bottom: 1px solid rgba(244,241,232,.15); }
  .site-nav .nav-contact { width: auto; min-width: 170px; margin-top: 22px; padding: 0 20px; font-size: 15px; border-bottom: 0; }
  .hero { min-height: 720px; }
  .hero-content { width: var(--max); }
  .hero-shade { background: linear-gradient(90deg, rgba(2,11,18,.96), rgba(2,11,18,.66) 80%, rgba(2,11,18,.46)); }
  .hero h1 { font-size: clamp(46px, 9vw, 68px); }
  .hero-index { display: none; }
  .overview { padding: 90px 0; grid-template-columns: 1fr; }
  .overview-copy, .overview-facts, .overview-note { grid-column: 1; }
  .overview-facts { margin-top: 25px; }
  .overview-note { margin-top: 18px; font-size: 17px; }
  .process { padding-top: 90px; padding-bottom: 95px; }
  .process-head { grid-template-columns: 1fr; gap: 30px; padding-bottom: 60px; }
  .process-flow { margin-top: 0; }
  .process-spine { left: 21px; }
  .flow-stage { grid-template-columns: 58px 1fr; min-height: 0; gap: 18px; padding: 65px 0; }
  .stage-number { grid-column: 1; }
  .stage-copy { grid-column: 2; }
  .stage-visual, .stage-product .stage-visual { grid-column: 2; width: 100%; min-height: 0; height: 360px; margin-top: 20px; }
  .applications { padding: 90px 0; }
  .section-heading { grid-template-columns: 1fr; margin-bottom: 60px; }
  .section-heading > p { grid-column: 1; }
  .application-story, .application-story.reverse { grid-template-columns: 1fr; gap: 0; padding: 55px 0; }
  .application-story.reverse .application-image { order: 0; }
  .application-image { height: min(58vw, 460px); }
  .application-copy { padding-bottom: 0; }
  .application-list { grid-template-columns: 54px 1fr; gap: 8px 20px; padding: 24px 0; }
  .application-list p, .application-list a { grid-column: 2; margin: 0; }
  .responsibility { min-height: 760px; }
  .responsibility-content { width: var(--max); }
  .responsibility-overlay { background: rgba(3,16,27,.78); }
  .responsibility-lines { grid-template-columns: 1fr; }
  .responsibility-lines div { display: grid; grid-template-columns: 45px 1fr; padding: 16px 0; border-bottom: 1px solid rgba(244,241,232,.18); border-right: 0; }
  .responsibility-lines strong { margin: 0; }
  .responsibility-lines small { grid-column: 2; }
  .about { grid-template-columns: 1fr; padding: 90px 0; }
  .about-side .kicker { margin-top: 18px; writing-mode: initial; }
  .about-main { padding: 0; border-left: 0; }
  .about-detail { grid-template-columns: 1fr; gap: 40px; }
  .contact { grid-template-columns: 1fr; }
  .contact-visual { height: 520px; }
  .contact-panel { padding: 75px 28px; }
  .site-footer { grid-template-columns: 1fr; padding-top: 45px; padding-bottom: 45px; }
  .footer-meta { justify-content: flex-start; }
}

@media (max-width: 520px) {
  :root { --max: calc(100vw - 32px); }
  .brand-mark { width: 34px; height: 34px; }
  .hero { min-height: 690px; }
  .hero-media { object-position: 58% center; }
  .hero-shade { background: rgba(2,11,18,.76); }
  .hero-content { padding-top: 65px; }
  .eyebrow { font-size: 9px; gap: 9px; }
  .eyebrow::after { width: 28px; }
  .hero h1 { font-size: clamp(40px, 12vw, 55px); line-height: 1.12; }
  .hero-lede { margin-top: 25px; font-size: 15px; }
  .hero-actions { width: 100%; display: grid; gap: 14px; margin-top: 30px; }
  .button { width: 100%; min-height: 52px; }
  .text-link { justify-content: center; }
  .scroll-cue { display: none; }
  .overview { padding: 75px 0; }
  .overview h2, .section-heading h2, .process-head h2, .responsibility h2, .about h2, .contact h2 { font-size: 38px; }
  .overview-facts { grid-template-columns: 1fr; }
  .overview-facts div { min-height: 82px; display: flex; align-items: center; justify-content: space-between; border-right: 0; border-bottom: 1px solid var(--line-dark); }
  .overview-facts strong { margin: 0; font-size: 19px; }
  .process { padding-left: 16px; padding-right: 16px; }
  .flow-stage { grid-template-columns: 48px minmax(0,1fr); gap: 10px; }
  .process-spine { left: 20px; }
  .stage-number { width: 42px; height: 42px; }
  .stage-copy h3 { font-size: 34px; }
  .stage-visual, .stage-product .stage-visual { height: 230px; }
  .stage-visual figcaption, .application-image figcaption { font-size: 8px; }
  .application-image { height: 250px; }
  .application-copy h3 { font-size: 43px; }
  .responsibility { min-height: 820px; }
  .responsibility-content .section-number { margin-bottom: 30px; }
  .responsibility-content > p:not(.kicker) { font-size: 15px; }
  .about-lead { margin: 28px 0 50px; font-size: 22px; }
  .about-detail dl div { grid-template-columns: 1fr; gap: 5px; }
  .contact-visual { height: 310px; }
  .contact-visual-label { left: 20px; bottom: 20px; }
  .contact-panel { padding: 65px 20px; }
  .contact-form { grid-template-columns: 1fr; }
  .form-wide { grid-column: 1; }
  .form-action { align-items: stretch; flex-direction: column; }
  .direct-contact > div { grid-template-columns: 70px 1fr; }
  .direct-contact a, .direct-contact address { overflow-wrap: anywhere; }
  .footer-nav, .footer-meta { flex-direction: column; gap: 10px; }
}

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