:root {
  --black: #080b0d;
  --graphite: #151a1e;
  --line: rgba(237, 241, 238, 0.15);
  --amber: #ffb000;
  --orange: #f05a28;
  --green: #8ccf72;
  --white: #edf1ee;
  --muted: #9ba39f;
  --page: min(1240px, calc(100vw - 96px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--black); }
body { margin: 0; background: var(--black); color: var(--white); font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }

.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; padding: 12px 18px; background: var(--amber); color: var(--black); }
.skip-link:focus { top: 16px; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 50; height: 88px; padding: 0 4vw; display: flex; align-items: center; justify-content: space-between; gap: 36px; background: linear-gradient(180deg, rgba(8,11,13,.94), rgba(8,11,13,.56) 72%, transparent); }
.brand, .footer-brand { display: flex; align-items: center; gap: 13px; min-width: max-content; }
.brand-mark { width: 47px; height: 47px; fill: none; stroke: var(--amber); stroke-width: 4; stroke-linecap: square; stroke-linejoin: bevel; }
.brand-mark .signal-mark { stroke: var(--orange); stroke-width: 3; }
.brand strong, .footer-brand strong { display: block; font-size: 17px; letter-spacing: .04em; }
.brand small, .footer-brand small { display: block; margin-top: 5px; color: var(--muted); font-size: 11px; letter-spacing: .16em; }
.site-nav { display: flex; align-items: center; gap: clamp(18px, 2.2vw, 38px); font-size: 13px; letter-spacing: .05em; }
.site-nav a { position: relative; padding: 11px 0; color: rgba(237,241,238,.82); }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 2px; height: 1px; background: var(--amber); transition: right .25s ease; }
.site-nav a:hover::after, .site-nav a:focus-visible::after { right: 0; }
.site-nav .nav-contact { color: var(--black); background: var(--amber); padding: 12px 18px; }
.site-nav .nav-contact::after { display: none; }
.menu-toggle { display: none; }

.hero { position: relative; min-height: 920px; height: 100vh; max-height: 1080px; overflow: hidden; display: flex; align-items: center; }
.hero > img { 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(8,11,13,.93) 0%, rgba(8,11,13,.66) 38%, rgba(8,11,13,.05) 70%), linear-gradient(0deg, rgba(8,11,13,.9) 0, transparent 36%); }
.hero-copy { position: relative; z-index: 2; width: var(--page); margin: 60px auto 0; }
.eyebrow { display: flex; align-items: center; gap: 11px; color: var(--amber); font-size: 11px; letter-spacing: .22em; text-transform: uppercase; }
.eyebrow span { width: 31px; height: 1px; background: currentColor; }
.hero h1 { max-width: 760px; margin: 26px 0; font-size: clamp(58px, 6.2vw, 94px); line-height: 1.06; font-weight: 300; letter-spacing: -.04em; }
.hero h1 em { color: var(--amber); font-style: normal; }
.hero-lead { max-width: 600px; margin: 0; color: rgba(237,241,238,.74); font-size: 18px; line-height: 1.9; }
.hero-actions { display: flex; gap: 16px; margin-top: 42px; }
.button { min-height: 48px; padding: 0 25px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid transparent; cursor: pointer; transition: .25s ease; letter-spacing: .06em; }
.button-primary { background: var(--amber); color: var(--black); }
.button-primary:hover, .button-primary:focus-visible { background: #ffc13d; transform: translateY(-2px); }
.button-ghost { border-color: rgba(237,241,238,.35); background: rgba(8,11,13,.18); backdrop-filter: blur(6px); }
.button-ghost:hover, .button-ghost:focus-visible { border-color: var(--amber); color: var(--amber); }
.hero-index { position: absolute; z-index: 2; right: 5vw; bottom: 56px; display: flex; gap: 1px; background: rgba(237,241,238,.13); }
.hero-index div { min-width: 150px; padding: 18px 22px; background: rgba(8,11,13,.78); backdrop-filter: blur(10px); }
.hero-index strong { display: block; font-size: 17px; font-weight: 500; color: var(--amber); }
.hero-index span { display: block; margin-top: 6px; color: var(--muted); font-size: 11px; }
.hero-wave { position: absolute; z-index: 3; left: 0; right: 0; bottom: 26%; width: 100%; height: 90px; overflow: visible; filter: drop-shadow(0 0 10px rgba(255,176,0,.55)); pointer-events: none; }
.hero-wave path { fill: none; stroke: var(--amber); stroke-width: 2; vector-effect: non-scaling-stroke; animation: signalPulse 4.5s ease-in-out infinite; }
@keyframes signalPulse { 0%,100%{opacity:.45} 50%{opacity:1} }

.intro-band { min-height: 150px; padding: 36px max(4vw, calc((100vw - 1240px)/2)); display: grid; grid-template-columns: 1fr auto 80px auto 80px auto 80px auto; align-items: center; gap: 12px; border-bottom: 1px solid var(--line); background: #0d1114; }
.intro-band p { max-width: 520px; margin: 0; font-size: 21px; line-height: 1.7; }
.intro-band span { color: var(--muted); font: 10px/1 Arial,sans-serif; letter-spacing: .14em; }
.intro-band i { height: 1px; background: linear-gradient(90deg, var(--amber), rgba(255,176,0,.05)); }

.products { padding: 140px 0 80px; }
.section-heading { width: var(--page); margin: 0 auto 110px; display: grid; grid-template-columns: 1.2fr 1fr; gap: 20px 8vw; align-items: end; }
.section-heading .eyebrow { grid-column: 1 / -1; margin: 0; }
.section-heading h2 { margin: 0; font-size: clamp(44px, 5vw, 78px); font-weight: 300; letter-spacing: -.04em; }
.section-heading > p:last-child { margin: 0; color: var(--muted); line-height: 1.9; }
.product-story { width: var(--page); margin: 0 auto 150px; display: grid; grid-template-columns: minmax(0,1.55fr) minmax(320px,.75fr); align-items: center; gap: 7vw; }
.product-story-right { grid-template-columns: minmax(320px,.75fr) minmax(0,1.55fr); }
.product-visual { position: relative; min-height: 530px; overflow: hidden; }
.product-visual::after { content: ""; position: absolute; inset: auto 0 0; height: 34%; background: linear-gradient(0deg, rgba(8,11,13,.7), transparent); pointer-events: none; }
.product-visual img { width: 100%; height: 100%; min-height: 530px; object-fit: cover; }
.product-copy { position: relative; padding-left: 30px; border-left: 1px solid rgba(255,176,0,.55); }
.product-story-right .product-copy { padding-left: 0; padding-right: 30px; border-left: 0; border-right: 1px solid rgba(255,176,0,.55); text-align: right; }
.story-index { margin: 0 0 20px; color: var(--amber); font: 11px/1 Arial,sans-serif; letter-spacing: .18em; }
.product-copy h3 { margin: 0 0 24px; font-size: clamp(32px, 3.2vw, 51px); line-height: 1.18; font-weight: 400; }
.product-copy > p:not(.story-index) { margin: 0; color: var(--muted); line-height: 2; }
.product-copy a { display: inline-flex; align-items: center; gap: 18px; margin-top: 32px; color: var(--white); font-size: 13px; }
.product-copy a span { color: var(--amber); font-size: 20px; transition: transform .2s ease; }
.product-copy a:hover span { transform: translateX(6px); }

.signal-chain { padding: 130px max(4vw, calc((100vw - 1240px)/2)); display: grid; grid-template-columns: .8fr 1.2fr; gap: 9vw; background: var(--white); color: var(--black); }
.signal-chain .eyebrow { color: #b45309; }
.chain-intro h2 { margin: 28px 0 0; font-size: clamp(42px, 5vw, 70px); line-height: 1.15; font-weight: 300; letter-spacing: -.04em; }
.chain-steps { position: relative; }
.chain-steps::before { content: ""; position: absolute; left: 23px; top: 25px; bottom: 25px; width: 1px; background: linear-gradient(var(--amber), var(--orange)); }
.chain-steps div { position: relative; padding: 0 0 42px 78px; }
.chain-steps div:last-child { padding-bottom: 0; }
.chain-steps b { position: absolute; left: 0; top: 0; width: 48px; height: 48px; display: grid; place-items: center; background: var(--black); color: var(--amber); font: 11px Arial,sans-serif; }
.chain-steps h3 { margin: 0 0 8px; font-size: 25px; font-weight: 500; }
.chain-steps p { margin: 0; color: #525a56; line-height: 1.8; }

.applications { position: relative; min-height: 760px; display: flex; align-items: center; overflow: hidden; }
.applications > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.applications-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(8,11,13,.94) 0%, rgba(8,11,13,.74) 42%, rgba(8,11,13,.05) 80%), linear-gradient(0deg, rgba(8,11,13,.78), transparent 42%); }
.applications-copy { position: relative; z-index: 2; width: min(570px, 42vw); margin-left: max(4vw, calc((100vw - 1240px)/2)); }
.applications-copy h2 { margin: 25px 0; font-size: clamp(45px,5vw,75px); font-weight: 300; letter-spacing: -.04em; }
.applications-copy > p:last-child { color: rgba(237,241,238,.72); line-height: 2; }
.application-list { position: absolute; z-index: 2; left: max(4vw, calc((100vw - 1240px)/2)); right: max(4vw, calc((100vw - 1240px)/2)); bottom: 38px; display: flex; justify-content: space-between; padding-top: 20px; border-top: 1px solid rgba(237,241,238,.3); }
.application-list span { color: rgba(237,241,238,.75); font-size: 13px; }

.manufacturing { width: var(--page); margin: 0 auto; padding: 150px 0; display: grid; grid-template-columns: 1.35fr .85fr; gap: 8vw; align-items: center; }
.manufacturing-image { min-height: 650px; }
.manufacturing-image img { width: 100%; height: 100%; min-height: 650px; object-fit: cover; }
.manufacturing-copy h2 { margin: 28px 0; font-size: clamp(40px,4.6vw,68px); font-weight: 300; line-height: 1.16; letter-spacing: -.04em; }
.manufacturing-copy > p:not(.eyebrow) { color: var(--muted); line-height: 2; }
.manufacturing-copy ol { margin: 50px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.manufacturing-copy li { display: grid; grid-template-columns: 120px 1fr; gap: 20px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.manufacturing-copy li strong { color: var(--amber); font: 11px Arial,sans-serif; letter-spacing: .12em; }
.manufacturing-copy li span { color: rgba(237,241,238,.78); }

.development { position: relative; min-height: 780px; display: flex; align-items: center; overflow: hidden; }
.development > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.development::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(8,11,13,.9), rgba(8,11,13,.55) 52%, rgba(8,11,13,.08)), linear-gradient(0deg, rgba(8,11,13,.62), transparent); }
.development-copy { position: relative; z-index: 2; width: min(620px, 47vw); margin-left: max(4vw, calc((100vw - 1240px)/2)); }
.development-copy .eyebrow { color: var(--green); }
.development-copy h2 { margin: 28px 0; font-size: clamp(45px,5vw,76px); font-weight: 300; line-height: 1.15; letter-spacing: -.04em; }
.development-copy > p:last-child { max-width: 560px; color: rgba(237,241,238,.73); line-height: 2; }
.development-year { position: absolute; z-index: 2; right: max(4vw, calc((100vw - 1240px)/2)); bottom: 60px; text-align: right; }
.development-year b { display: block; color: var(--green); font: 300 clamp(58px,7vw,110px)/.8 Arial,sans-serif; }
.development-year span { display: block; margin-top: 18px; letter-spacing: .1em; }

.about { width: var(--page); margin: 0 auto; padding: 150px 0; display: grid; grid-template-columns: 1fr 1fr; gap: 10vw; border-bottom: 1px solid var(--line); }
.about-title h2 { margin: 28px 0 0; font-size: clamp(45px,5vw,74px); font-weight: 300; line-height: 1.15; letter-spacing: -.04em; }
.about-copy { padding-top: 58px; }
.about-copy p { margin: 0 0 28px; color: var(--muted); font-size: 18px; line-height: 2; }

.contact { width: var(--page); margin: 0 auto; padding: 140px 0; display: grid; grid-template-columns: .8fr 1.2fr; gap: 9vw; }
.contact-details h2 { margin: 28px 0 54px; font-size: clamp(44px,5vw,72px); line-height: 1.15; font-weight: 300; letter-spacing: -.04em; }
.contact-details dl { margin: 0; }
.contact-details dl div { padding: 20px 0; border-top: 1px solid var(--line); }
.contact-details dt { color: var(--muted); font-size: 12px; }
.contact-details dd { margin: 8px 0 0; line-height: 1.65; }
.contact-details dd a { color: var(--amber); font-size: 22px; }
.contact-form { padding-top: 54px; }
.contact-form label { display: block; color: var(--muted); font-size: 12px; letter-spacing: .04em; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; margin-top: 10px; padding: 16px 0; color: var(--white); border: 0; border-bottom: 1px solid rgba(237,241,238,.28); border-radius: 0; outline: 0; background: transparent; resize: vertical; }
.contact-form select { color-scheme: dark; }
.contact-form textarea { min-height: 140px; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { border-bottom-color: var(--amber); }
.contact-form > label { margin: 30px 0; }
.contact-form .button { margin-top: 10px; }
.form-status { min-height: 28px; margin: 18px 0 0; color: var(--amber); line-height: 1.7; }

.site-footer { min-height: 210px; padding: 58px max(4vw, calc((100vw - 1240px)/2)); display: grid; grid-template-columns: 1.2fr 1fr auto; align-items: center; gap: 5vw; background: #050708; border-top: 1px solid rgba(237,241,238,.1); }
.footer-links { display: grid; grid-template-columns: 1fr 1fr; gap: 15px 40px; color: var(--muted); font-size: 12px; }
.footer-links a:hover { color: var(--amber); }
.visual-note { margin: 0; color: #666d69; font-size: 11px; white-space: nowrap; }

@media (max-width: 1100px) {
  :root { --page: min(100% - 64px, 900px); }
  .site-header { height: 78px; }
  .menu-toggle { position: relative; z-index: 61; width: 44px; height: 44px; display: grid; place-content: center; gap: 5px; border: 0; background: transparent; cursor: pointer; }
  .menu-toggle span { width: 24px; height: 1px; background: var(--white); transition: .25s ease; }
  .menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
  .site-nav { position: fixed; z-index: 60; inset: 0; padding: 110px 8vw 50px; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: 8px; background: rgba(8,11,13,.98); opacity: 0; visibility: hidden; transform: translateY(-20px); transition: .3s ease; }
  .site-nav.open { opacity: 1; visibility: visible; transform: none; }
  .site-nav a { width: 100%; padding: 16px 0; font-size: 21px; border-bottom: 1px solid var(--line); }
  .site-nav .nav-contact { width: auto; margin-top: 18px; padding: 13px 20px; font-size: 15px; border: 0; }
  body.menu-open { overflow: hidden; }
  .hero { min-height: 820px; }
  .hero-index { left: 32px; right: 32px; bottom: 38px; }
  .hero-index div { flex: 1; min-width: 0; }
  .intro-band { grid-template-columns: 1fr; gap: 18px; }
  .intro-band span, .intro-band i { display: none; }
  .section-heading { grid-template-columns: 1fr; }
  .product-story, .product-story-right { grid-template-columns: 1fr; gap: 38px; }
  .product-story-right .product-copy { order: 2; text-align: left; padding: 0 0 0 30px; border: 0; border-left: 1px solid rgba(255,176,0,.55); }
  .signal-chain { grid-template-columns: 1fr; }
  .applications-copy, .development-copy { width: 62vw; }
  .manufacturing { grid-template-columns: 1fr; }
  .manufacturing-image { min-height: 520px; }
  .manufacturing-image img { min-height: 520px; }
  .contact { grid-template-columns: 1fr; }
  .contact-form { padding-top: 0; }
  .site-footer { grid-template-columns: 1fr 1fr; }
  .visual-note { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  :root { --page: calc(100% - 36px); }
  .site-header { height: 68px; padding: 0 18px; background: rgba(8,11,13,.9); }
  .brand-mark { width: 39px; height: 39px; }
  .brand strong { max-width: 210px; font-size: 13px; }
  .brand small { display: none; }
  .hero { min-height: 760px; height: 100svh; max-height: 900px; align-items: flex-start; }
  .hero > img { object-position: 62% center; }
  .hero-shade { background: linear-gradient(90deg, rgba(8,11,13,.92), rgba(8,11,13,.28)), linear-gradient(0deg, rgba(8,11,13,.92) 0, rgba(8,11,13,.12) 58%); }
  .hero-copy { margin-top: 150px; }
  .hero h1 { margin: 20px 0; font-size: clamp(46px, 14vw, 61px); }
  .hero-lead { max-width: 92%; font-size: 15px; line-height: 1.8; }
  .hero-actions { flex-direction: column; align-items: flex-start; gap: 10px; margin-top: 30px; }
  .button { min-height: 46px; }
  .hero-index { left: 18px; right: 18px; bottom: 22px; }
  .hero-index div { padding: 12px 10px; }
  .hero-index strong { font-size: 13px; }
  .hero-index span { font-size: 9px; }
  .hero-wave { bottom: 29%; }
  .intro-band { min-height: 110px; padding: 28px 18px; }
  .intro-band p { font-size: 16px; }
  .products { padding: 95px 0 20px; }
  .section-heading { margin-bottom: 65px; }
  .section-heading h2 { font-size: 42px; }
  .product-story { margin-bottom: 92px; }
  .product-visual, .product-visual img { min-height: 350px; }
  .product-copy h3 { font-size: 34px; }
  .signal-chain { padding: 90px 18px; }
  .chain-intro h2 { font-size: 40px; }
  .applications { min-height: 760px; align-items: flex-start; }
  .applications > img { object-position: 62% center; }
  .applications-overlay { background: linear-gradient(180deg, rgba(8,11,13,.95), rgba(8,11,13,.48) 64%, rgba(8,11,13,.88)); }
  .applications-copy { width: calc(100% - 36px); margin: 90px 18px 0; }
  .applications-copy h2 { font-size: 42px; }
  .application-list { left: 18px; right: 18px; bottom: 28px; flex-wrap: wrap; justify-content: flex-start; gap: 16px 24px; }
  .manufacturing { padding: 90px 0; }
  .manufacturing-image, .manufacturing-image img { min-height: 380px; }
  .manufacturing-copy h2 { font-size: 41px; }
  .manufacturing-copy li { grid-template-columns: 94px 1fr; }
  .development { min-height: 760px; align-items: flex-start; }
  .development > img { object-position: 48% center; }
  .development::after { background: linear-gradient(180deg, rgba(8,11,13,.93), rgba(8,11,13,.3) 58%, rgba(8,11,13,.86)); }
  .development-copy { width: calc(100% - 36px); margin: 92px 18px 0; }
  .development-copy h2 { font-size: 42px; }
  .development-year { right: 18px; bottom: 38px; }
  .about { padding: 90px 0; grid-template-columns: 1fr; gap: 30px; }
  .about-title h2 { font-size: 42px; }
  .about-copy { padding-top: 0; }
  .about-copy p { font-size: 16px; }
  .contact { padding: 90px 0; }
  .contact-details h2 { font-size: 42px; }
  .field-row { grid-template-columns: 1fr; gap: 28px; }
  .site-footer { padding: 46px 18px; grid-template-columns: 1fr; }
  .footer-links { margin-top: 10px; }
  .visual-note { grid-column: auto; }
}

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