:root {
  --ink: #0b0d0e;
  --graphite: #121618;
  --steel: #30373a;
  --paper: #f0f2ef;
  --white: #f7f8f6;
  --muted: #9ba3a3;
  --orange: #ff6422;
  --teal: #43d2c3;
  --line-dark: rgba(255, 255, 255, 0.19);
  --line-light: rgba(11, 13, 14, 0.18);
  --sans: "Microsoft YaHei", "PingFang SC", sans-serif;
  --display: "Bahnschrift SemiCondensed", "Arial Narrow", sans-serif;
  --mono: Consolas, "Courier New", monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--ink); }
body { margin: 0; background: var(--ink); color: var(--white); font-family: var(--sans); overflow-x: hidden; }
body.menu-open { overflow: hidden; }
img { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
::selection { background: var(--orange); color: var(--ink); }

.skip-link { position: fixed; left: 16px; top: -80px; z-index: 200; background: var(--white); color: var(--ink); padding: 12px 18px; }
.skip-link:focus { top: 16px; }
.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; }
.scroll-progress { position: fixed; inset: 0 0 auto; z-index: 160; height: 3px; background: transparent; }
.scroll-progress span { display: block; width: 100%; height: 100%; background: var(--orange); transform: scaleX(0); transform-origin: left; }

.site-header { position: fixed; z-index: 140; top: 0; left: 0; width: 100%; min-height: 84px; display: grid; grid-template-columns: minmax(250px, 1fr) auto minmax(180px, 1fr); align-items: center; gap: 30px; padding: 12px clamp(22px, 4vw, 72px); border-bottom: 1px solid var(--line-dark); transition: background .3s, min-height .3s; }
.site-header.is-scrolled { min-height: 68px; background: rgba(11, 13, 14, .92); backdrop-filter: blur(14px); }
.brand { display: inline-flex; align-items: center; gap: 12px; justify-self: start; }
.brand-mark { width: 44px; height: 44px; fill: none; stroke: var(--white); stroke-width: 4; stroke-linecap: square; stroke-linejoin: miter; flex: none; }
.brand-mark .brand-base { stroke: var(--orange); }
.brand-type { display: grid; line-height: 1; gap: 5px; }
.brand-type strong { font-size: 17px; letter-spacing: .15em; }
.brand-type small { font: 500 9px/1 var(--mono); letter-spacing: .16em; color: #c7ccca; }
.desktop-nav { display: flex; gap: clamp(24px, 3vw, 48px); align-items: center; justify-content: center; }
.desktop-nav a { position: relative; font-size: 13px; letter-spacing: .08em; color: #e2e4e2; }
.desktop-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -11px; height: 2px; background: var(--orange); transition: right .25s; }
.desktop-nav a:hover::after, .desktop-nav a:focus-visible::after { right: 0; }
.header-contact { justify-self: end; font: 500 13px/1 var(--mono); color: var(--white); letter-spacing: .04em; }
.menu-toggle { display: none; justify-self: end; width: 44px; height: 44px; border: 0; background: transparent; padding: 10px; color: inherit; }
.menu-toggle > span:not(.sr-only) { display: block; width: 24px; height: 1px; margin: 7px auto; background: currentColor; transition: transform .25s; }
.menu-toggle[aria-expanded="true"] > span:nth-of-type(2) { transform: translateY(4px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] > span:nth-of-type(3) { transform: translateY(-4px) rotate(-45deg); }
.mobile-menu { position: fixed; z-index: 130; inset: 0; background: var(--ink); display: none; visibility: hidden; opacity: 0; transition: opacity .25s; }
.mobile-menu[aria-hidden="false"] { visibility: visible; opacity: 1; }
.mobile-menu-inner { min-height: 100%; display: flex; flex-direction: column; justify-content: center; padding: 110px 24px 36px; }
.menu-label { font: 400 11px/1 var(--mono); color: var(--orange); text-transform: uppercase; letter-spacing: .14em; margin-bottom: 28px; }
.mobile-menu a { display: flex; gap: 20px; align-items: baseline; border-top: 1px solid var(--line-dark); padding: 14px 0; font-size: clamp(24px, 8vw, 38px); font-weight: 500; }
.mobile-menu a em { font: normal 11px/1 var(--mono); color: var(--orange); }
.mobile-menu .mobile-call { margin-top: 28px; color: var(--teal); font: 500 14px/1.4 var(--mono); }

.hero { position: relative; min-height: 100svh; overflow: hidden; display: flex; align-items: center; padding: 130px clamp(24px, 7.8vw, 150px) 90px; }
.hero-image, .hero-shade, .hero-grid { position: absolute; inset: 0; height: 100%; object-fit: cover; }
.hero-image { object-position: center; }
.hero-shade { background: linear-gradient(90deg, rgba(5, 7, 8, .94) 0%, rgba(5, 7, 8, .76) 34%, rgba(5, 7, 8, .12) 70%, rgba(5, 7, 8, .28) 100%), linear-gradient(0deg, rgba(5,7,8,.65), transparent 45%); }
.hero-grid { opacity: .23; background-image: linear-gradient(var(--line-dark) 1px, transparent 1px), linear-gradient(90deg, var(--line-dark) 1px, transparent 1px); background-size: 100% 22%, 10% 100%; }
.hero-copy { position: relative; z-index: 2; max-width: 780px; }
.hero-kicker, .eyebrow { margin: 0 0 24px; font: 500 11px/1.3 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--orange); }
.hero h1 { margin: 0; font: 600 clamp(68px, 9.4vw, 158px)/.82 var(--display); letter-spacing: -.045em; text-transform: uppercase; }
.hero h1 span { display: block; }
.hero h1 span:last-child { color: transparent; -webkit-text-stroke: 1.5px rgba(247,248,246,.86); }
.hero-intro { width: min(560px, 90%); margin: 34px 0 0; color: #d5d9d6; font-size: clamp(16px, 1.2vw, 20px); line-height: 1.8; }
.hero-actions { display: flex; align-items: center; gap: 28px; margin-top: 36px; }
.action-primary { display: inline-flex; align-items: center; justify-content: space-between; min-width: 210px; padding: 16px 20px; background: var(--orange); color: var(--ink); font-weight: 600; clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px)); }
.action-secondary { border-bottom: 1px solid var(--white); padding: 10px 0; font-size: 14px; }
.hero-scale { position: absolute; z-index: 2; right: clamp(24px, 4vw, 72px); top: 140px; bottom: 110px; width: 72px; border-right: 1px solid rgba(255,255,255,.36); display: flex; flex-direction: column; justify-content: space-between; align-items: flex-end; padding-right: 14px; }
.hero-scale span, .hero-scale b { font: 400 9px/1 var(--mono); color: #cbd0ce; writing-mode: vertical-rl; }
.hero-scale i { display: block; width: 20px; border-top: 1px solid rgba(255,255,255,.45); }
.hero-scale i:nth-of-type(3) { width: 40px; border-color: var(--orange); }
.hero-caption { position: absolute; z-index: 2; bottom: 28px; right: clamp(24px, 4vw, 72px); margin: 0; font: 400 10px/1 var(--mono); letter-spacing: .12em; color: #afb5b2; }

.section-light { background: var(--paper); color: var(--ink); }
.section-index { display: flex; align-items: flex-start; gap: 14px; }
.section-index > span { font: 500 clamp(52px, 6vw, 92px)/.78 var(--display); letter-spacing: -.04em; }
.section-index > p { margin: 0; padding-top: 4px; font: 500 10px/1.5 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.dark-index, .light-index { color: var(--white); }
.profile { position: relative; display: grid; grid-template-columns: .55fr 1.1fr 1.35fr; gap: clamp(30px, 5vw, 90px); padding: clamp(90px, 10vw, 180px) clamp(24px, 5vw, 96px); overflow: hidden; }
.profile-copy { align-self: center; max-width: 660px; }
.profile-copy h2, .equipment-heading h2, .manufacturing-heading h2, .development-heading h2, .contact-heading h2 { margin: 0; font-size: clamp(42px, 5vw, 86px); line-height: 1.06; letter-spacing: -.05em; font-weight: 500; }
.profile-copy .lead { margin: 38px 0 20px; font-size: clamp(20px, 1.7vw, 28px); line-height: 1.6; }
.profile-copy > p:last-child { margin: 0; color: #4e5655; font-size: 15px; line-height: 1.9; }
.profile-media { margin: 0; align-self: end; }
.profile-media img { aspect-ratio: 4 / 5; object-fit: cover; filter: saturate(.82) contrast(1.05); }
.profile-media figcaption, .feature-visual figcaption { display: flex; justify-content: space-between; gap: 20px; padding-top: 12px; border-top: 1px solid var(--ink); font: 500 10px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.profile-line { position: absolute; left: 5vw; right: 5vw; bottom: 48px; border-top: 1px solid var(--line-light); }
.profile-line span { display: block; width: 24%; margin-top: -1px; border-top: 3px solid var(--orange); }

.equipment { padding: clamp(90px, 9vw, 160px) clamp(24px, 5vw, 96px); background: var(--graphite); }
.equipment-heading { display: grid; grid-template-columns: .52fr 2fr; gap: clamp(28px, 7vw, 120px); align-items: end; margin-bottom: clamp(60px, 8vw, 130px); }
.equipment-heading h2 { max-width: 970px; }
.equipment-feature { display: grid; grid-template-columns: minmax(0, 1.75fr) minmax(300px, .72fr); gap: clamp(34px, 5vw, 90px); align-items: center; }
.feature-visual { margin: 0; }
.feature-visual img { aspect-ratio: 16 / 9; object-fit: cover; }
.feature-visual figcaption { border-color: var(--line-dark); color: #bbc1bf; }
.feature-copy { max-width: 500px; }
.feature-number { display: block; margin-bottom: 48px; font: 500 12px/1 var(--mono); letter-spacing: .08em; color: var(--orange); }
.feature-copy h3, .service-copy h3, .inspection-copy h3 { margin: 0; font-size: clamp(36px, 4vw, 68px); line-height: 1.05; letter-spacing: -.04em; font-weight: 500; }
.feature-copy > p:not(.eyebrow), .service-copy > p:not(.eyebrow), .inspection-copy > p { color: #bac0be; line-height: 1.85; font-size: 15px; }
.text-link { display: inline-flex; gap: 30px; align-items: center; margin-top: 18px; padding-bottom: 7px; border-bottom: 1px solid currentColor; font-size: 13px; }
.equipment-directory { margin-top: clamp(80px, 10vw, 160px); border-top: 1px solid var(--line-dark); }
.directory-row { display: grid; grid-template-columns: 80px minmax(220px, 1fr) minmax(220px, 1.2fr) 120px; align-items: center; min-height: 106px; gap: 22px; border-bottom: 1px solid var(--line-dark); transition: background .25s, padding .25s; }
.directory-row:hover { background: rgba(255,255,255,.035); padding-inline: 14px; }
.directory-row em { font: normal 11px/1 var(--mono); color: var(--orange); }
.directory-row strong { font-size: clamp(20px, 2vw, 30px); font-weight: 500; }
.directory-row span, .directory-row b { font: 400 11px/1.4 var(--mono); letter-spacing: .08em; color: #9fa6a4; }
.directory-row b { font-weight: 400; text-align: right; }
.service-vehicle { margin-top: clamp(90px, 12vw, 190px); display: grid; grid-template-columns: minmax(300px, .7fr) minmax(0, 1.55fr); align-items: end; gap: clamp(40px, 7vw, 120px); }
.service-copy { padding-bottom: 20px; }
.service-visual { margin: 0; }
.service-visual img { aspect-ratio: 16 / 9; object-fit: cover; }

.intelligence { position: relative; min-height: min(970px, 100svh); display: flex; align-items: stretch; overflow: hidden; }
.intelligence-image, .intelligence-overlay { position: absolute; inset: 0; height: 100%; object-fit: cover; }
.intelligence-overlay { background: linear-gradient(90deg, rgba(6,8,9,.94) 0%, rgba(6,8,9,.75) 46%, rgba(6,8,9,.2) 76%), linear-gradient(0deg, rgba(6,8,9,.7), transparent 55%); }
.intelligence-copy { position: relative; z-index: 2; width: 100%; display: grid; grid-template-columns: .5fr 1.15fr .85fr; align-items: center; gap: clamp(30px, 5vw, 90px); padding: 110px clamp(24px, 5vw, 96px); }
.intelligence-title h2 { margin: 0; font-size: clamp(56px, 7vw, 112px); line-height: .98; letter-spacing: -.05em; font-weight: 500; }
.intelligence-note { align-self: end; max-width: 480px; padding: 24px 0; border-top: 1px solid var(--teal); }
.intelligence-note > p { margin: 0; color: #d0d5d3; line-height: 1.85; font-size: 15px; }
.tech-points { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 28px; }
.tech-points span { font: 500 10px/1 var(--mono); letter-spacing: .1em; color: var(--teal); }

.manufacturing { padding: clamp(90px, 10vw, 180px) clamp(24px, 5vw, 96px); }
.manufacturing-heading { display: grid; grid-template-columns: .5fr 1.1fr .7fr; align-items: end; gap: clamp(30px, 6vw, 100px); margin-bottom: clamp(60px, 7vw, 120px); }
.manufacturing-heading > p { margin: 0 0 8px; color: #4d5554; line-height: 1.8; }
.factory-panorama { margin: 0; }
.factory-panorama img { aspect-ratio: 16 / 8.2; object-fit: cover; }
.factory-panorama figcaption { display: flex; justify-content: space-between; gap: 20px; border-bottom: 1px solid var(--ink); padding: 14px 0; }
.factory-panorama figcaption span { font: 500 10px/1 var(--mono); letter-spacing: .08em; }
.factory-panorama figcaption strong { font-size: 14px; font-weight: 500; }
.manufacturing-flow { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 46px 0; color: #414746; font: 500 11px/1.4 var(--mono); }
.manufacturing-flow i { flex: 1; border-top: 1px solid var(--line-light); position: relative; }
.manufacturing-flow i::after { content: ""; position: absolute; right: 0; top: -3px; width: 5px; height: 5px; border-top: 1px solid var(--ink); border-right: 1px solid var(--ink); transform: rotate(45deg); }
.inspection { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(40px, 8vw, 130px); align-items: center; padding-top: clamp(70px, 8vw, 130px); }
.inspection-copy h3 { font-size: clamp(34px, 4vw, 62px); }
.inspection-copy > p { color: #4d5554; }
.inspection-visual { margin: 0; }
.inspection-visual img { aspect-ratio: 3 / 2; object-fit: cover; }

.development { position: relative; min-height: 970px; overflow: hidden; display: flex; align-items: flex-end; }
.development-image, .development-shade { position: absolute; inset: 0; height: 100%; object-fit: cover; }
.development-shade { background: linear-gradient(90deg, rgba(5,8,8,.9), rgba(5,8,8,.3) 64%), linear-gradient(0deg, rgba(5,8,8,.92) 0%, transparent 60%); }
.development-content { position: relative; z-index: 2; width: 100%; padding: 110px clamp(24px, 5vw, 96px) 80px; }
.development-heading { display: grid; grid-template-columns: .5fr 1.5fr; gap: clamp(28px, 7vw, 120px); align-items: end; margin-bottom: 90px; }
.timeline { list-style: none; margin: 0; padding: 0; border-top: 1px solid rgba(255,255,255,.5); display: grid; grid-template-columns: repeat(3, 1fr); }
.timeline li { position: relative; min-height: 190px; padding: 28px clamp(18px, 3vw, 46px) 0 0; border-right: 1px solid var(--line-dark); }
.timeline li::before { content: ""; position: absolute; top: -5px; left: 0; width: 9px; height: 9px; border-radius: 50%; background: var(--orange); }
.timeline time { display: block; font: 500 clamp(36px, 4vw, 62px)/1 var(--display); color: var(--teal); }
.timeline p { max-width: 390px; color: #d7dbd9; line-height: 1.75; font-size: 14px; }

.contact { padding: clamp(90px, 10vw, 180px) clamp(24px, 5vw, 96px) 100px; background: #e4e7e3; color: var(--ink); }
.contact-heading { display: grid; grid-template-columns: .5fr 1.5fr; gap: clamp(30px, 7vw, 120px); margin-bottom: clamp(80px, 9vw, 150px); }
.contact-layout { display: grid; grid-template-columns: .95fr 1.05fr; gap: clamp(50px, 10vw, 170px); align-items: start; }
.contact-details { margin: 0; font-style: normal; }
.contact-details > div { display: grid; grid-template-columns: 150px 1fr; gap: 24px; padding: 22px 0; border-top: 1px solid var(--line-light); }
.contact-details span, .contact-details > div > span { font: 500 10px/1.5 var(--mono); letter-spacing: .08em; color: #5b6361; }
.contact-details a, .contact-details p { margin: 0; font-size: clamp(17px, 1.5vw, 23px); line-height: 1.5; }
.official-link { display: inline-flex; justify-content: space-between; gap: 50px; margin-top: 38px; padding: 15px 0; border-bottom: 1px solid var(--ink); font-size: 13px !important; }
.inquiry-form { border-top: 3px solid var(--orange); }
.form-row { display: grid; grid-template-columns: 150px 1fr; align-items: start; gap: 22px; padding: 24px 0; border-bottom: 1px solid var(--line-light); }
.form-row label { padding-top: 6px; font: 500 10px/1.5 var(--mono); letter-spacing: .08em; color: #5b6361; }
.form-row input, .form-row textarea { width: 100%; padding: 4px 0; border: 0; outline: 0; resize: vertical; background: transparent; color: var(--ink); border-bottom: 1px solid transparent; }
.form-row input:focus, .form-row textarea:focus { border-color: var(--orange); }
.inquiry-form button { width: 100%; display: flex; justify-content: space-between; margin-top: 28px; padding: 18px 22px; border: 0; background: var(--ink); color: var(--white); cursor: pointer; clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px)); }
.form-status { min-height: 24px; margin: 16px 0 0; color: #4c5654; font-size: 13px; }

.site-footer { min-height: 120px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 30px; padding: 24px clamp(24px, 5vw, 96px); border-top: 1px solid var(--line-dark); background: var(--ink); }
.footer-brand { display: flex; align-items: center; gap: 14px; }
.footer-brand strong { font-size: 13px; letter-spacing: .06em; }
.footer-brand .brand-mark { width: 38px; height: 38px; }
.site-footer > p { margin: 0; font-size: 11px; color: #8f9694; }
.site-footer > a { justify-self: end; font: 500 11px/1 var(--mono); }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .75s ease, transform .75s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1120px) {
  .site-header { grid-template-columns: 1fr auto; }
  .desktop-nav, .header-contact { display: none; }
  .menu-toggle, .mobile-menu { display: block; }
  .profile { grid-template-columns: .35fr 1fr; }
  .profile-media { grid-column: 2; }
  .profile-media img { aspect-ratio: 16 / 10; }
  .equipment-feature { grid-template-columns: 1.4fr .7fr; }
  .intelligence-copy { grid-template-columns: .35fr 1fr; }
  .intelligence-note { grid-column: 2; align-self: start; }
  .manufacturing-heading { grid-template-columns: .35fr 1fr; }
  .manufacturing-heading > p { grid-column: 2; }
}

@media (max-width: 760px) {
  .site-header { min-height: 68px; padding: 8px 18px; }
  .brand-type strong { font-size: 14px; }
  .brand-type small { font-size: 7px; }
  .brand-mark { width: 40px; height: 40px; }
  .hero { min-height: 820px; padding: 120px 20px 90px; align-items: flex-end; }
  .hero-image { object-position: 66% center; }
  .hero-shade { background: linear-gradient(0deg, rgba(5,7,8,.97) 0%, rgba(5,7,8,.7) 57%, rgba(5,7,8,.25) 100%); }
  .hero h1 { font-size: clamp(66px, 21vw, 104px); }
  .hero-intro { width: 100%; font-size: 15px; line-height: 1.7; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 10px; }
  .action-primary { min-width: 100%; }
  .action-secondary { align-self: flex-start; }
  .hero-scale { display: none; }
  .hero-caption { left: 20px; right: auto; }
  .profile, .equipment-heading, .equipment-feature, .service-vehicle, .intelligence-copy, .manufacturing-heading, .inspection, .development-heading, .contact-heading, .contact-layout { grid-template-columns: 1fr; }
  .profile { gap: 46px; padding: 90px 20px 110px; }
  .profile-media, .intelligence-note, .manufacturing-heading > p { grid-column: auto; }
  .profile-copy .lead { margin-top: 28px; font-size: 19px; }
  .profile-media img { aspect-ratio: 4 / 5; }
  .profile-line { left: 20px; right: 20px; }
  .equipment { padding: 90px 20px; }
  .equipment-heading { gap: 42px; margin-bottom: 60px; }
  .equipment-feature { gap: 42px; }
  .feature-copy { order: -1; }
  .feature-number { margin-bottom: 28px; }
  .equipment-directory { margin-top: 90px; }
  .directory-row { grid-template-columns: 42px 1fr; gap: 10px 14px; padding: 18px 0; }
  .directory-row span { grid-column: 2; }
  .directory-row b { display: none; }
  .service-vehicle { margin-top: 100px; gap: 38px; }
  .intelligence { min-height: 900px; }
  .intelligence-image { object-position: 45% center; }
  .intelligence-overlay { background: linear-gradient(0deg, rgba(6,8,9,.96), rgba(6,8,9,.55) 68%, rgba(6,8,9,.28)); }
  .intelligence-copy { align-content: end; gap: 40px; padding: 100px 20px 70px; }
  .intelligence-note { padding-bottom: 0; }
  .manufacturing { padding: 90px 20px; }
  .factory-panorama img { aspect-ratio: 4 / 5; }
  .factory-panorama figcaption { align-items: flex-start; flex-direction: column; }
  .manufacturing-flow { display: grid; grid-template-columns: 1fr auto 1fr; gap: 14px; padding: 40px 0; }
  .manufacturing-flow i { width: 26px; }
  .inspection { padding-top: 80px; }
  .inspection-visual img { aspect-ratio: 4 / 5; }
  .development { min-height: 920px; }
  .development-image { object-position: 42% center; }
  .development-content { padding: 100px 20px 50px; }
  .development-heading { gap: 44px; margin-bottom: 60px; }
  .timeline { grid-template-columns: 1fr; }
  .timeline li { min-height: auto; padding: 24px 0 28px; border-right: 0; border-bottom: 1px solid var(--line-dark); }
  .contact { padding: 90px 20px 70px; }
  .contact-heading { gap: 42px; margin-bottom: 70px; }
  .contact-layout { gap: 80px; }
  .contact-details > div, .form-row { grid-template-columns: 1fr; gap: 8px; }
  .site-footer { grid-template-columns: 1fr; gap: 20px; padding: 36px 20px; }
  .site-footer > a { justify-self: start; }
}

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