:root {
  --ink: #0b0d10;
  --paper: #f5f5ef;
  --white: #fff;
  --gray: #70757d;
  --line: #c9cbc7;
  --blue: #2157ff;
  --magenta: #e8488b;
  --yellow: #e5b82d;
  --max: 1540px;
  --pad: clamp(24px, 4.4vw, 72px);
  --display: "Arial Narrow", "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  --body: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--body); font-size: 16px; line-height: 1.65; overflow-x: hidden; }
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
::selection { color: var(--white); background: var(--blue); }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; }
.hero :focus-visible, .dark :focus-visible, .site-header:not(.scrolled):not(.menu-active) :focus-visible, .site-footer :focus-visible { outline-color: var(--yellow); }
.skip-link { position: fixed; z-index: 1000; top: 8px; left: 8px; padding: 10px 14px; background: var(--white); color: var(--ink); transform: translateY(-140%); }
.skip-link:focus { transform: translateY(0); }
.registration-rail { position: fixed; z-index: 50; top: 0; right: 0; bottom: 0; width: 8px; display: grid; grid-template-columns: repeat(4, 1fr); pointer-events: none; }
.registration-rail span { transform-origin: top; transform: scaleY(var(--progress, 0)); transition: transform .16s linear; }
.rail-c { background: var(--blue); }.rail-m { background: var(--magenta); }.rail-y { background: var(--yellow); }.rail-k { background: var(--ink); }
.site-header { position: fixed; z-index: 40; top: 0; left: 0; right: 8px; height: 78px; display: flex; align-items: center; justify-content: space-between; padding: 0 var(--pad); color: var(--white); border-bottom: 1px solid rgba(255,255,255,.25); transition: color .2s, background .2s, border-color .2s; }
.site-header.scrolled, .site-header.menu-active { color: var(--ink); background: rgba(245,245,239,.96); border-color: var(--line); backdrop-filter: blur(12px); }
.site-header.menu-active { backdrop-filter: none; }
.brand { display: flex; gap: 12px; align-items: center; text-decoration: none; min-height: 48px; }
.brand img { width: 46px; height: 46px; }
.brand span { display: grid; line-height: 1.1; }
.brand strong { font-size: 14px; letter-spacing: .08em; }
.brand small { margin-top: 6px; font: 10px var(--mono); letter-spacing: .12em; opacity: .72; }
.site-nav { display: flex; gap: clamp(18px, 2.4vw, 42px); align-items: center; }
.site-nav a { position: relative; text-decoration: none; font-size: 14px; min-height: 44px; display: flex; gap: 7px; align-items: center; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 4px; height: 2px; background: var(--blue); transform: scaleX(0); transform-origin: left; transition: transform .2s; }
.site-nav a:hover::after, .site-nav a.active::after { transform: scaleX(1); }
.site-nav span { font: 10px var(--mono); opacity: .6; }
.site-nav .nav-contact { padding: 0 18px; color: var(--ink); background: var(--white); }
.site-header.scrolled .nav-contact, .site-header.menu-active .nav-contact { color: var(--white); background: var(--ink); }
.menu-toggle { display: none; min-width: 48px; min-height: 48px; color: inherit; background: transparent; border: 0; cursor: pointer; }
.hero { min-height: 100svh; position: relative; color: var(--white); background: var(--ink); overflow: hidden; }
.hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(6,8,10,.95) 0, rgba(6,8,10,.78) 36%, rgba(6,8,10,.12) 66%); }
.hero-copy { position: relative; z-index: 2; min-height: 100svh; display: flex; flex-direction: column; justify-content: flex-end; padding: 116px var(--pad) clamp(46px, 7vh, 88px); max-width: var(--max); margin: 0 auto; }
.eyebrow { display: flex; justify-content: space-between; width: min(720px, 70vw); margin: 0 0 28px; font: 11px var(--mono); letter-spacing: .16em; }
.hero h1 { margin: 0; font: 800 clamp(64px, 10.6vw, 172px)/.82 var(--display); letter-spacing: -.065em; text-transform: uppercase; }
.hero h1 span { display: block; }
.hero h1 span:last-child { margin-left: clamp(24px, 9vw, 150px); color: transparent; -webkit-text-stroke: 1.5px rgba(255,255,255,.85); }
.hero-bottom { display: grid; grid-template-columns: minmax(260px, 550px) auto; align-items: end; gap: 36px; margin-top: clamp(32px, 5vh, 64px); }
.hero-bottom p { margin: 0; font-size: clamp(16px, 1.35vw, 20px); color: rgba(255,255,255,.82); }
.text-link { min-height: 44px; display: inline-flex; gap: 36px; align-items: center; justify-content: space-between; padding-bottom: 8px; border-bottom: 2px solid currentColor; font-weight: 650; text-decoration: none; white-space: nowrap; }
.text-link span { font-size: 22px; }
.text-link:hover span { transform: translate(3px,3px); }
.hero-index { position: absolute; right: 34px; bottom: 50px; z-index: 2; display: grid; font: 11px var(--mono); text-align: center; }
.hero-index b { padding-bottom: 44px; border-bottom: 1px solid rgba(255,255,255,.5); }
.hero-index span { padding-top: 8px; opacity: .5; }
.section { max-width: var(--max); margin: 0 auto; padding: clamp(92px, 10vw, 168px) var(--pad); }
.section-index { display: flex; gap: 22px; align-items: baseline; padding-top: 12px; border-top: 2px solid currentColor; font: 11px var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.section-index p { margin: 0; }
.section-index span { color: var(--blue); }
.kicker { margin: 0 0 20px; color: var(--blue); font: 11px var(--mono); letter-spacing: .16em; }
h2 { margin: 0; font: 700 clamp(38px, 5.2vw, 80px)/1.04 var(--display); letter-spacing: -.045em; }
.intro { display: grid; grid-template-columns: 160px minmax(0, 1fr); gap: 54px clamp(36px, 7vw, 118px); }
.intro-main h2 { max-width: 1120px; }
.intro-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; margin: 58px 0 72px; max-width: 980px; }
.intro-columns p { margin: 0; color: #41464d; }
.intro-figure { grid-column: 2; }
.media-frame { margin: 0; }
.media-frame img { width: 100%; aspect-ratio: 16/8.4; object-fit: cover; }
.media-frame figcaption, .material-panorama figcaption { display: flex; justify-content: space-between; padding-top: 12px; border-top: 1px solid currentColor; font: 11px var(--mono); letter-spacing: .08em; }
.dark { max-width: none; color: var(--white); background: var(--ink); }
.dark > * { max-width: calc(var(--max) - 2 * var(--pad)); margin-left: auto; margin-right: auto; }
.dark .kicker, .dark .section-index span, .application-list article > span { color: #7698ff; }
.directions { display: grid; grid-template-columns: 160px minmax(0, 1fr); gap: 54px clamp(36px, 7vw, 118px); }
.directions .section-index { margin: 0; }
.directions-head { margin: 0; }
.directions-head h2 { max-width: 1050px; }
.pouch-stage { grid-column: 2; display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr); gap: clamp(32px, 5vw, 76px); margin: 70px 0 0; align-items: start; }
.pouch-stage .media-frame img { aspect-ratio: 1.3/1; }
.application-list { border-top: 1px solid rgba(255,255,255,.45); }
.application-list article { position: relative; padding: 24px 0 30px 44px; border-bottom: 1px solid rgba(255,255,255,.28); }
.application-list article > span { position: absolute; left: 0; top: 28px; font: 10px var(--mono); color: var(--blue); }
.application-list h3 { margin: 0 0 8px; font-size: 22px; }
.application-list p { margin: 0; color: rgba(255,255,255,.7); }
.boundary-note { grid-column: 2; margin: 28px 0 0; padding-top: 16px; border-top: 1px solid var(--yellow); color: rgba(255,255,255,.68); font-size: 13px; }
.process { display: grid; grid-template-columns: 160px minmax(0, 1fr); gap: 54px clamp(36px, 7vw, 118px); }
.process-title h2 { max-width: 1050px; }
.process-flow { grid-column: 2; margin-top: 76px; border-top: 1px solid var(--line); }
.process-row { display: grid; grid-template-columns: minmax(280px, .68fr) minmax(0, 1.32fr); gap: 50px; padding: 52px 0; border-bottom: 1px solid var(--line); align-items: center; }
.process-row.reverse { grid-template-columns: minmax(0, 1.32fr) minmax(280px, .68fr); }
.process-row.reverse .process-copy { order: 2; }
.process-copy > span { font: 10px var(--mono); color: var(--blue); }
.process-copy h3 { margin: 16px 0; font: 700 clamp(30px, 3vw, 50px)/1 var(--display); }
.process-copy p { margin: 0; max-width: 430px; color: #51555b; }
.process-row figure { margin: 0; overflow: hidden; }
.process-row img { width: 100%; aspect-ratio: 3/1.62; object-fit: cover; transition: transform .6s cubic-bezier(.2,.7,.2,1); }
.process-row:hover img { transform: scale(1.02); }
.inspection-band { grid-column: 1 / -1; display: grid; grid-template-columns: 1.35fr .65fr; margin-top: 92px; background: var(--blue); color: var(--white); }
.inspection-band figure { margin: 0; }
.inspection-band img { width: 100%; height: 100%; min-height: 460px; object-fit: cover; }
.inspection-band > div { padding: clamp(36px, 5vw, 72px); display: flex; flex-direction: column; justify-content: end; }
.inspection-band .kicker { color: var(--white); opacity: .7; }
.inspection-band h3 { margin: 0 0 20px; font: 700 clamp(40px, 4vw, 64px)/1 var(--display); }
.inspection-band p { margin: 0; color: rgba(255,255,255,.8); }
.project { display: block; padding-left: var(--pad); padding-right: var(--pad); }
.project-grid { display: grid; grid-template-columns: minmax(320px, .82fr) minmax(420px, 1.18fr); gap: clamp(60px, 10vw, 170px); margin-top: 76px; }
.project-title { margin: 0; }
.timeline { margin: 0; }
.timeline > div { display: grid; grid-template-columns: 100px 1fr; gap: 24px; padding: 0 0 38px; position: relative; }
.timeline > div::before { content: ""; position: absolute; left: 5px; top: 24px; bottom: 0; width: 1px; background: rgba(255,255,255,.28); }
.timeline > div::after { content: ""; position: absolute; left: 0; top: 7px; width: 11px; height: 11px; background: var(--blue); }
.timeline .future::after { background: var(--yellow); }
.timeline time { padding-left: 24px; font: 11px var(--mono); color: rgba(255,255,255,.62); }
.timeline p { margin: 0; display: grid; gap: 5px; }
.timeline strong { font-size: 18px; }
.timeline span { color: rgba(255,255,255,.62); }
.material-panorama { max-width: calc(var(--max) - 2 * var(--pad)); margin: 92px auto 0; }
.material-panorama img { width: 100%; max-height: 680px; object-fit: cover; }
.contact { display: grid; grid-template-columns: 160px minmax(320px, .8fr) minmax(400px, 1.2fr); gap: 54px clamp(36px, 6vw, 90px); }
.contact-copy h2 { margin-bottom: 32px; }
.contact-copy > p:not(.kicker) { color: #50555b; max-width: 620px; }
address { margin-top: 48px; padding-top: 18px; border-top: 1px solid var(--line); font-style: normal; }
address span { display: block; margin-bottom: 8px; font: 10px var(--mono); color: var(--blue); }
.contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 32px 24px; align-content: start; }
.contact-form label { display: grid; gap: 10px; }
.contact-form label span { font: 11px var(--mono); letter-spacing: .08em; }
.contact-form input, .contact-form textarea { width: 100%; padding: 13px 0; border: 0; border-bottom: 2px solid var(--ink); border-radius: 0; background: transparent; color: var(--ink); outline: 0; }
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--blue); box-shadow: 0 3px 0 var(--blue); }
.contact-form [aria-invalid="true"] { border-color: #b00020; }
.contact-form .full { grid-column: 1 / -1; }
.form-action { display: grid; grid-template-columns: max-content 1fr; gap: 22px; align-items: center; }
.form-action button { min-height: 52px; padding: 0 24px; color: var(--white); background: var(--ink); border: 2px solid var(--ink); cursor: pointer; font-weight: 700; }
.form-action button:hover { color: var(--ink); background: transparent; }
.form-status { margin: 0; min-height: 26px; font-size: 14px; color: #34383e; }
.site-footer { max-width: none; padding: 58px var(--pad) 26px; color: var(--white); background: var(--ink); display: grid; grid-template-columns: 1.3fr .7fr 1fr; gap: 48px; }
.footer-brand { display: flex; align-items: center; gap: 18px; }
.footer-brand p { display: grid; margin: 0; }
.footer-brand span { margin-top: 6px; font: 9px var(--mono); letter-spacing: .08em; color: rgba(255,255,255,.55); }
.footer-links { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 20px; align-content: center; }
.footer-links a { min-height: 44px; display: flex; align-items: center; text-decoration: none; font-size: 13px; }
.footer-notes { font-size: 12px; color: rgba(255,255,255,.56); }
.footer-notes p { margin: 0 0 7px; }
.copyright { grid-column: 1 / -1; margin: 24px 0 0; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.2); font: 10px var(--mono); color: rgba(255,255,255,.62); }
[data-reveal] { opacity: 0; transform: translateY(12px); transition: opacity .36s ease, transform .36s ease; }
[data-reveal].revealed { opacity: 1; transform: none; }
@media (max-width: 980px) {
  .site-header { height: 70px; }
  .menu-toggle { display: grid; place-content: center; gap: 7px; }
  .menu-icon, .menu-icon::after { display: block; width: 26px; height: 2px; background: currentColor; transition: transform .2s; content: ""; }
  .menu-icon::after { transform: translateY(7px); }
  .menu-label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .menu-toggle[aria-expanded="true"] .menu-icon { transform: translateY(4px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] .menu-icon::after { transform: rotate(-90deg); }
  .site-nav { display: none; position: fixed; inset: 70px 8px 0 0; padding: 50px var(--pad); color: var(--ink); background: var(--paper); flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav.open { display: flex; }
  .site-nav a { min-height: 70px; border-bottom: 1px solid var(--line); font-size: 20px; }
  .site-nav .nav-contact { margin-top: 28px; justify-content: center; min-height: 56px; color: var(--white); background: var(--ink); }
  .intro, .directions, .process { grid-template-columns: 110px minmax(0,1fr); gap: 44px 34px; }
  .pouch-stage { grid-template-columns: 1fr; }
  .application-list { display: grid; grid-template-columns: repeat(3,1fr); }
  .application-list article { padding-right: 14px; }
  .process-row, .process-row.reverse { grid-template-columns: 1fr; }
  .process-row.reverse .process-copy { order: 0; }
  .inspection-band { grid-template-columns: 1fr; }
  .project-grid { grid-template-columns: 1fr; }
  .contact { grid-template-columns: 110px 1fr; }
  .contact-form { grid-column: 2; }
  .site-footer { grid-template-columns: 1fr 1fr; }
  .footer-notes { grid-column: 1 / -1; }
}
@media (max-width: 640px) {
  :root { --pad: 20px; }
  .registration-rail { width: 5px; }
  .site-header { right: 5px; }
  .brand strong { font-size: 12px; }
  .brand small { display: none; }
  .hero-copy { padding-top: 98px; }
  .hero-shade { background: linear-gradient(180deg, rgba(6,8,10,.16), rgba(6,8,10,.92) 68%); }
  .hero-image { object-position: 62% center; }
  .eyebrow { width: 100%; }
  .eyebrow span:last-child { display: none; }
  .hero h1 { font-size: clamp(58px, 18vw, 82px); }
  .hero h1 span:last-child { margin-left: 0; }
  .hero-bottom { grid-template-columns: 1fr; gap: 24px; }
  .hero-index { display: none; }
  .section { padding-top: 88px; padding-bottom: 88px; }
  .intro, .directions, .process, .contact { display: block; }
  .section-index { margin-bottom: 42px !important; }
  h2 { font-size: clamp(38px, 12vw, 56px); }
  .intro-columns { grid-template-columns: 1fr; gap: 18px; margin: 38px 0 50px; }
  .intro-figure, .pouch-stage, .boundary-note, .process-flow { grid-column: auto; }
  .media-frame img { aspect-ratio: 4/3; }
  .application-list { grid-template-columns: 1fr; }
  .process-flow { margin-top: 46px; }
  .process-row, .process-row.reverse { padding: 36px 0; gap: 24px; }
  .process-row img { aspect-ratio: 4/3; }
  .inspection-band { margin-top: 58px; }
  .inspection-band img { min-height: 300px; }
  .project-grid { margin-top: 50px; }
  .timeline > div { grid-template-columns: 86px 1fr; gap: 14px; }
  .material-panorama { margin-top: 54px; }
  .contact-form { margin-top: 54px; grid-template-columns: 1fr; }
  .contact-form label, .contact-form .full { grid-column: 1; }
  .form-action { grid-template-columns: 1fr; }
  .form-action button { width: 100%; }
  .site-footer { grid-template-columns: 1fr; gap: 30px; }
  .footer-notes, .copyright { grid-column: 1; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
}