:root {
  --ink: #111820;
  --ink-soft: #263746;
  --steel: #506a7e;
  --paper: #f3f3ef;
  --white: #fff;
  --line: rgba(17, 24, 32, .18);
  --orange: #c74412;
  --orange-dark: #9d2f07;
  --green: #3d5e49;
  --max: 1280px;
  --header: 84px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header); }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Segoe UI", "Noto Sans SC", "Microsoft YaHei", sans-serif; line-height: 1.6; }
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid #ff7a3f; outline-offset: 3px; }

.skip-link { position: fixed; left: 16px; top: -80px; z-index: 1000; padding: 12px 18px; background: var(--white); color: var(--ink); text-decoration: none; }
.skip-link:focus { top: 12px; }

.site-header { position: sticky; top: 0; z-index: 50; min-height: var(--header); display: flex; align-items: center; justify-content: space-between; gap: 32px; padding: 0 max(28px, calc((100vw - var(--max)) / 2)); background: rgba(243, 243, 239, .96); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
.brand { display: inline-flex; align-items: center; gap: 13px; min-height: 56px; text-decoration: none; }
.brand-mark { width: 38px; height: 38px; fill: var(--ink-soft); flex: 0 0 auto; }
.brand-mark-accent { fill: var(--orange); }
.brand-copy { display: grid; line-height: 1.25; }
.brand-copy strong { font-size: 16px; letter-spacing: .02em; }
.brand-copy small { margin-top: 4px; color: var(--steel); font-size: 11px; letter-spacing: .24em; }
.site-nav { display: flex; align-items: center; gap: 26px; }
.site-nav a { position: relative; padding: 28px 0; font-size: 13px; font-weight: 650; text-decoration: none; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 19px; height: 2px; background: var(--orange); transition: right .22s ease; }
.site-nav a:hover::after, .site-nav a:focus-visible::after { right: 0; }
.site-nav .nav-contact { min-height: 44px; display: inline-flex; align-items: center; padding: 10px 16px; color: var(--white); background: var(--ink); }
.site-nav .nav-contact::after { display: none; }
.menu-toggle { display: none; }

.hero { position: relative; min-height: calc(100svh - var(--header)); overflow: hidden; color: var(--white); background: var(--ink); isolation: isolate; }
.hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; z-index: -3; }
.hero-shade { position: absolute; inset: 0; z-index: -2; background: linear-gradient(90deg, rgba(9, 14, 20, .96) 0%, rgba(9, 14, 20, .76) 38%, rgba(9, 14, 20, .08) 72%); }
.hero-grid { position: absolute; inset: 0; z-index: -1; opacity: .16; background-image: linear-gradient(rgba(255,255,255,.25) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.25) 1px, transparent 1px); background-size: 80px 80px; }
.hero-content { width: min(680px, calc(100% - 56px)); margin-left: max(28px, calc((100vw - var(--max)) / 2)); padding-top: clamp(100px, 15vh, 170px); }
.eyebrow { display: flex; align-items: center; gap: 18px; margin: 0 0 26px; font-size: 12px; letter-spacing: .2em; }
.eyebrow span { color: #cbd5dc; }
.eyebrow b { padding-left: 18px; border-left: 1px solid var(--orange); }
.hero h1 { margin: 0; font-size: clamp(52px, 6.8vw, 104px); line-height: .98; letter-spacing: -.07em; font-weight: 760; }
.hero-lead { max-width: 550px; margin: 30px 0 0; color: #d8e0e5; font-size: clamp(16px, 1.35vw, 19px); }
.hero-actions { display: flex; gap: 12px; margin-top: 34px; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: 0 22px; border: 1px solid transparent; border-radius: 0; cursor: pointer; font-weight: 700; text-decoration: none; transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--white); background: var(--orange); }
.button-primary:hover { background: var(--orange-dark); }
.button-ghost { color: var(--white); border-color: rgba(255,255,255,.48); background: rgba(0,0,0,.18); }
.button-ghost:hover { border-color: var(--white); background: rgba(0,0,0,.42); }
.hero-facts { position: absolute; right: max(28px, calc((100vw - var(--max)) / 2)); bottom: 42px; display: flex; gap: 1px; }
.hero-facts div { width: 190px; min-height: 88px; display: grid; align-content: center; padding: 14px 18px; background: rgba(8, 14, 20, .74); border-top: 2px solid var(--orange); }
.hero-facts span { font-size: 24px; font-weight: 750; letter-spacing: -.03em; }
.hero-facts small { color: #c7d2d9; font-size: 11px; }
.datum { position: absolute; left: 0; right: 0; pointer-events: none; }
.datum-hero { top: 58%; height: 1px; background: rgba(230, 82, 24, .6); transform: rotate(-1.6deg); transform-origin: left center; }
.datum-hero i { position: absolute; left: 61%; top: -5px; width: 11px; height: 11px; border: 2px solid var(--orange); border-radius: 50%; background: var(--ink); }

.section { padding: clamp(80px, 10vw, 148px) max(28px, calc((100vw - var(--max)) / 2)); }
.section-heading { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(300px, .7fr); gap: 10vw; align-items: end; margin-bottom: 58px; }
.section-index { margin: 0 0 20px; color: var(--orange-dark); font-size: 11px; font-weight: 750; letter-spacing: .22em; }
.process .section-index, .contact .section-index { color: #ff9a72; }
.section h2, .application h2, .contact h2 { margin: 0; font-size: clamp(40px, 5vw, 72px); line-height: 1.04; letter-spacing: -.055em; }
.section-heading > p, .quality-intro > p:last-child { max-width: 510px; margin: 0; color: #50606b; font-size: 16px; }

.products { background: var(--paper); }
.product-stage { margin: 0; border-top: 1px solid var(--line); }
.product-stage > img { width: 100%; max-height: 680px; object-fit: cover; object-position: center; background: var(--white); }
.product-rail { display: grid; grid-template-columns: repeat(6, 1fr); border-bottom: 1px solid var(--line); }
.product-rail span { min-height: 82px; display: grid; align-content: center; gap: 8px; padding: 12px 14px; border-right: 1px solid var(--line); font-size: 12px; font-weight: 650; }
.product-rail span:last-child { border-right: 0; }
.product-rail b { color: var(--orange-dark); font-family: ui-monospace, "Cascadia Mono", monospace; font-size: 10px; }
.named-parts { display: grid; grid-template-columns: .4fr 1fr; gap: 32px; padding-top: 30px; }
.named-parts > p { margin: 0; color: var(--steel); font-size: 12px; letter-spacing: .12em; }
.named-parts ul { display: flex; flex-wrap: wrap; gap: 10px 28px; margin: 0; padding: 0; list-style: none; }
.named-parts li { position: relative; padding-left: 15px; font-weight: 650; }
.named-parts li::before { content: ""; position: absolute; left: 0; top: .72em; width: 6px; height: 2px; background: var(--orange); }

.process { color: var(--white); background: var(--ink); }
.section-heading-light > p { color: #aebbc4; }
.process-wide { margin: 0; color: var(--ink); background: var(--white); }
.process-wide img { width: 100%; max-height: 760px; object-fit: cover; }
.process-wide figcaption { display: flex; align-items: center; justify-content: center; gap: 24px; min-height: 70px; padding: 16px; color: var(--ink-soft); font-size: 13px; font-weight: 700; }
.process-wide figcaption i { width: 52px; height: 1px; background: var(--orange); }
.process-transition { display: grid; grid-template-columns: .8fr 1.2fr; min-height: 620px; margin-top: 64px; border-top: 1px solid rgba(255,255,255,.18); }
.transition-copy { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; padding: 48px 9% 48px 0; }
.large-number { color: rgba(255,255,255,.08); font-size: clamp(100px, 14vw, 190px); line-height: .8; font-weight: 800; letter-spacing: -.09em; }
.transition-copy h3 { margin: 10px 0 18px; font-size: clamp(34px, 3.5vw, 54px); line-height: 1.06; letter-spacing: -.05em; }
.transition-copy > p:not(.section-index) { color: #afbbc3; }
.process-transition > img { width: 100%; height: 100%; object-fit: cover; }
.text-link { min-height: 44px; display: inline-flex; gap: 12px; align-items: center; margin-top: 22px; padding-bottom: 6px; border-bottom: 1px solid currentColor; color: inherit; font-weight: 700; text-decoration: none; }

.quality { padding-bottom: 0; background: var(--white); }
.quality-intro { max-width: 890px; margin-bottom: 56px; }
.quality-intro h2 { margin-bottom: 25px; }
.quality-split { display: grid; grid-template-columns: 1fr 1fr; margin-left: min(0px, calc((var(--max) - 100vw) / 2)); margin-right: min(0px, calc((var(--max) - 100vw) / 2)); }
.quality-panel { position: relative; min-height: 680px; overflow: hidden; color: var(--ink); background: var(--paper); }
.quality-panel-dark { color: var(--white); background: var(--ink); }
.quality-panel img { width: 100%; height: 100%; object-fit: cover; }
.quality-panel::after { content: ""; position: absolute; inset: 45% 0 0; background: linear-gradient(transparent, rgba(243,243,239,.96)); }
.quality-panel-dark::after { background: linear-gradient(transparent, rgba(9,15,21,.96)); }
.quality-panel > div { position: absolute; z-index: 2; left: 42px; right: 42px; bottom: 34px; }
.quality-panel span { color: #842707; font-family: ui-monospace, "Cascadia Mono", monospace; font-size: 11px; letter-spacing: .16em; }
.quality-panel-dark span { color: #ff9a72; }
.quality-panel h3 { margin: 8px 0; font-size: 34px; }
.quality-panel p { max-width: 420px; margin: 0; }
.data-strip { min-height: 100px; display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-left: min(0px, calc((var(--max) - 100vw) / 2)); margin-right: min(0px, calc((var(--max) - 100vw) / 2)); padding: 20px max(28px, calc((100vw - var(--max)) / 2)); color: var(--white); background: var(--orange); }
.data-strip b { color: var(--white); font-size: 12px; letter-spacing: .16em; }
.data-strip span { font-weight: 700; }

.application { position: relative; min-height: 760px; display: flex; align-items: flex-end; padding: 80px max(28px, calc((100vw - var(--max)) / 2)); overflow: hidden; color: var(--white); background: var(--ink); }
.application > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.application-shade { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(8,14,20,.95), rgba(8,14,20,.1) 70%); }
.application-copy { position: relative; z-index: 1; max-width: 800px; }
.application .section-index { color: #ff9a72; }
.application-copy p:last-child { max-width: 640px; color: #d2dce2; }

.green { display: grid; grid-template-columns: 1.15fr .85fr; gap: 7vw; align-items: center; background: #e7ece8; }
.green-media { position: relative; }
.green-media::before { content: ""; position: absolute; left: -16px; top: -16px; width: 86px; height: 86px; border-left: 2px solid var(--orange); border-top: 2px solid var(--orange); }
.green-media img { width: 100%; min-height: 520px; object-fit: cover; }
.green-year { display: block; margin-bottom: 10px; color: var(--green); font-size: clamp(72px, 9vw, 128px); line-height: .9; font-weight: 760; letter-spacing: -.08em; }
.green-copy h2 { margin-bottom: 24px; font-size: clamp(36px, 4.2vw, 62px); }
.green-copy > p { color: #45564a; }
.green-copy .boundary-note { padding-left: 18px; border-left: 2px solid var(--orange); font-size: 13px; }

.about { display: grid; grid-template-columns: .8fr 1.2fr; gap: 10vw; background: var(--paper); }
.about-heading { position: sticky; top: calc(var(--header) + 30px); align-self: start; }
.timeline { border-top: 1px solid var(--line); }
.timeline-row { display: grid; grid-template-columns: 150px 1fr; gap: 30px; padding: 36px 0; border-bottom: 1px solid var(--line); }
.timeline-row time { color: var(--orange-dark); font-family: ui-monospace, "Cascadia Mono", monospace; font-size: 34px; font-weight: 750; }
.timeline-row p { display: grid; gap: 8px; margin: 0; }
.timeline-row strong { font-size: 20px; }
.timeline-row span { color: #586773; }

.contact { display: grid; grid-template-columns: .9fr 1.1fr; min-height: 760px; color: var(--white); background: var(--ink); }
.contact-details { padding: clamp(70px, 8vw, 120px) 7vw max(70px, 8vw); }
.contact-details > p:not(.section-index) { color: #b7c3cb; }
.contact address { margin-top: 48px; font-style: normal; }
.contact address div { display: grid; grid-template-columns: 90px 1fr; gap: 20px; padding: 18px 0; border-top: 1px solid rgba(255,255,255,.17); }
.contact address span { color: #8fa0ab; font-size: 12px; letter-spacing: .12em; }
.contact address p { margin: 0; overflow-wrap: anywhere; }
.contact address a { min-height: 44px; display: inline-flex; align-items: center; text-decoration-color: rgba(255,255,255,.4); text-underline-offset: 3px; }
.inquiry-form { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-content: center; padding: clamp(70px, 8vw, 120px) 7vw; color: var(--ink); background: var(--white); }
.form-heading { grid-column: 1 / -1; margin-bottom: 20px; }
.form-heading span { color: var(--orange-dark); font-size: 11px; font-weight: 750; letter-spacing: .2em; }
.form-heading h3 { margin: 6px 0 0; font-size: 36px; letter-spacing: -.04em; }
.inquiry-form label { display: grid; gap: 8px; }
.inquiry-form label > span { font-size: 12px; font-weight: 700; letter-spacing: .06em; }
.inquiry-form label b { color: var(--orange-dark); }
.inquiry-form input, .inquiry-form select, .inquiry-form textarea { width: 100%; border: 0; border-bottom: 1px solid #9ba6ad; border-radius: 0; padding: 12px 4px; color: var(--ink); background: transparent; }
.inquiry-form textarea { border: 1px solid #9ba6ad; padding: 12px; resize: vertical; }
.form-wide { grid-column: 1 / -1; }
.form-submit { justify-self: start; }
.form-status { align-self: center; margin: 0; color: #9b2c09; font-size: 13px; font-weight: 700; }

.site-footer { min-height: 150px; display: grid; grid-template-columns: 1fr auto auto; gap: 34px; align-items: center; padding: 32px max(28px, calc((100vw - var(--max)) / 2)); color: #d5dde2; background: #080d12; border-top: 1px solid rgba(255,255,255,.1); }
.footer-brand { display: flex; align-items: center; gap: 14px; }
.footer-brand .brand-mark { fill: #d5dde2; }
.footer-brand p { display: grid; margin: 0; }
.footer-brand span { color: #81919c; font-size: 11px; letter-spacing: .16em; }
.creative-note, .copyright { margin: 0; color: #82919a; font-size: 11px; }

@media (max-width: 1080px) {
  .site-nav { gap: 16px; }
  .site-nav a { font-size: 12px; }
  .hero-facts { right: 28px; }
  .product-rail { grid-template-columns: repeat(3, 1fr); }
  .product-rail span:nth-child(3) { border-right: 0; }
  .product-rail span:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
  .green { grid-template-columns: 1fr; }
  .green-media img { min-height: 420px; }
}

@media (max-width: 820px) {
  :root { --header: 72px; }
  .site-header { padding: 0 20px; backdrop-filter: none; }
  .brand-copy strong { font-size: 14px; }
  .brand-copy small { letter-spacing: .14em; }
  .menu-toggle { position: relative; z-index: 70; min-width: 74px; min-height: 48px; display: inline-flex; align-items: center; justify-content: flex-end; gap: 10px; padding: 0; border: 0; color: var(--ink); background: transparent; cursor: pointer; }
  .menu-toggle-label { font-size: 12px; font-weight: 750; }
  .menu-toggle-icon { position: relative; width: 22px; height: 18px; }
  .menu-toggle-icon i { position: absolute; left: 0; width: 22px; height: 2px; background: currentColor; transition: transform .2s ease, top .2s ease; }
  .menu-toggle-icon i:first-child { top: 4px; }
  .menu-toggle-icon i:last-child { top: 12px; }
  .menu-toggle[aria-expanded="true"] { color: var(--white); }
  .menu-toggle[aria-expanded="true"] .menu-toggle-icon i:first-child { top: 8px; transform: rotate(45deg); }
  .menu-toggle[aria-expanded="true"] .menu-toggle-icon i:last-child { top: 8px; transform: rotate(-45deg); }
  .site-nav { position: fixed; inset: 0; z-index: 60; display: flex; flex-direction: column; align-items: flex-start; justify-content: flex-start; gap: 0; padding: 94px 28px 36px; overflow-y: auto; color: var(--white); background: rgba(10, 16, 22, .985); visibility: hidden; opacity: 0; pointer-events: none; transition: opacity .2s ease, visibility .2s ease; }
  .site-nav.is-open { visibility: visible; opacity: 1; pointer-events: auto; }
  .site-nav a { width: 100%; padding: 11px 0; border-bottom: 1px solid rgba(255,255,255,.16); font-size: 24px; }
  .site-nav a::after { display: none; }
  .site-nav .nav-contact { margin-top: 22px; padding: 14px 18px; color: var(--white); background: var(--orange); border: 0; font-size: 16px; }
  .hero { min-height: 780px; }
  .hero-image { object-position: 67% center; }
  .hero-shade { background: linear-gradient(90deg, rgba(9,14,20,.94), rgba(9,14,20,.48)); }
  .hero-content { margin-left: 28px; padding-top: 110px; }
  .hero h1 { font-size: clamp(48px, 12vw, 76px); }
  .hero-facts { left: 28px; right: auto; bottom: 28px; }
  .hero-facts div { width: min(40vw, 170px); }
  .section-heading { grid-template-columns: 1fr; gap: 28px; }
  .process-transition { grid-template-columns: 1fr; }
  .transition-copy { padding-right: 0; }
  .process-transition > img { min-height: 500px; }
  .quality-split { grid-template-columns: 1fr; }
  .quality-panel { min-height: 620px; }
  .data-strip { flex-wrap: wrap; justify-content: flex-start; }
  .data-strip b { width: 100%; }
  .application { min-height: 660px; }
  .about { grid-template-columns: 1fr; }
  .about-heading { position: static; }
  .contact { grid-template-columns: 1fr; }
  .site-footer { grid-template-columns: 1fr; gap: 14px; }
}

@media (max-width: 540px) {
  .brand-mark { width: 32px; height: 32px; }
  .brand-copy strong { max-width: 190px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .brand-copy small { display: none; }
  .hero { min-height: 760px; }
  .hero-content { width: calc(100% - 40px); margin-left: 20px; padding-top: 90px; }
  .eyebrow { gap: 10px; }
  .hero h1 { font-size: clamp(46px, 13vw, 62px); }
  .hero-lead { font-size: 15px; }
  .hero-actions { align-items: stretch; flex-direction: column; width: min(290px, 100%); }
  .hero-facts { left: 20px; bottom: 20px; }
  .hero-facts div { width: calc((100vw - 40px) / 2); padding: 12px; }
  .section { padding-left: 20px; padding-right: 20px; }
  .section h2, .application h2, .contact h2 { font-size: 40px; }
  .product-rail { grid-template-columns: 1fr 1fr; }
  .product-rail span, .product-rail span:nth-child(3) { min-height: 70px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .product-rail span:nth-child(even) { border-right: 0; }
  .named-parts { grid-template-columns: 1fr; }
  .process-wide figcaption { flex-wrap: wrap; gap: 8px 14px; justify-content: flex-start; padding: 18px; }
  .process-wide figcaption i { width: 18px; }
  .process-transition > img { min-height: 360px; }
  .quality { padding-left: 0; padding-right: 0; }
  .quality-intro { padding: 0 20px; }
  .quality-panel { min-height: 520px; }
  .quality-panel > div { left: 20px; right: 20px; bottom: 22px; }
  .data-strip { margin: 0; padding: 20px; gap: 12px 20px; }
  .application { min-height: 580px; padding: 60px 20px; }
  .application > img { object-position: 60% center; }
  .green-media img { min-height: 300px; }
  .timeline-row { grid-template-columns: 88px 1fr; gap: 18px; }
  .timeline-row time { font-size: 25px; }
  .contact-details, .inquiry-form { padding: 68px 20px; }
  .inquiry-form { grid-template-columns: 1fr; }
  .form-heading, .form-wide { grid-column: auto; }
  .form-status { grid-column: 1; }
  .site-footer { padding: 34px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}