:root {
  --ink: #101511;
  --paper: #f3f1eb;
  --lime: #d8f05b;
  --orange: #f26a32;
  --line: rgba(16, 21, 17, 0.15);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }

.site-header {
  position: absolute;
  z-index: 20;
  top: 0;
  left: 0;
  width: 100%;
  height: 92px;
  padding: 0 clamp(24px, 5vw, 80px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: white;
  border-bottom: 1px solid rgba(255,255,255,.18);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 42px; height: 42px; display: grid; place-items: center;
  color: var(--ink); background: var(--lime); font-weight: 900; letter-spacing: -1px;
}
.brand strong { display: block; font-size: 18px; letter-spacing: .08em; }
.brand small { display: block; margin-top: 3px; font-size: 8px; letter-spacing: .18em; opacity: .65; }
.nav { display: flex; align-items: center; gap: clamp(20px, 2.6vw, 42px); font-size: 14px; }
.nav a { opacity: .78; transition: .2s ease; }
.nav a:hover { opacity: 1; }
.nav-cta { padding: 12px 20px; border: 1px solid rgba(255,255,255,.5); }
.menu-button { display: none; }

.hero {
  position: relative; min-height: 790px; height: 94vh; overflow: hidden;
  display: flex; align-items: center; color: white;
  background: #172019 url("/assets/hero.jpg") center/cover no-repeat;
}
.hero-shade {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(8,15,11,.94) 0%, rgba(8,15,11,.72) 46%, rgba(8,15,11,.16) 100%),
    linear-gradient(0deg, rgba(8,15,11,.45), transparent 45%);
}
.hero-content { position: relative; z-index: 2; width: min(820px, 90vw); margin-left: clamp(24px, 9vw, 145px); padding-top: 50px; }
.eyebrow, .section-kicker { font-size: 11px; letter-spacing: .22em; font-weight: 700; }
.eyebrow { display: flex; align-items: center; gap: 12px; color: var(--lime); }
.eyebrow span { width: 34px; height: 1px; background: var(--lime); }
.hero h1 {
  margin: 24px 0; font-size: clamp(58px, 7.8vw, 118px); line-height: .95;
  letter-spacing: -.055em; font-weight: 800;
}
.hero-copy { width: min(580px, 90%); font-size: 18px; line-height: 1.85; color: rgba(255,255,255,.76); }
.hero-actions { display: flex; gap: 12px; margin-top: 38px; }
.button { padding: 17px 24px; font-size: 14px; font-weight: 700; }
.button.primary { background: var(--lime); color: var(--ink); }
.button.primary b { margin-left: 28px; }
.button.ghost { border: 1px solid rgba(255,255,255,.35); }
.hero-card {
  position: absolute; z-index: 3; right: clamp(24px, 5vw, 80px); bottom: 46px;
  width: 260px; padding: 20px 22px; background: rgba(16,21,17,.83); backdrop-filter: blur(12px);
  border-left: 2px solid var(--lime);
}
.hero-card small, .hero-card strong { display: block; margin-left: 20px; }
.hero-card small { opacity: .55; font-size: 11px; margin-bottom: 8px; }
.hero-card strong { font-size: 14px; }
.pulse { position: absolute; top: 22px; width: 8px; height: 8px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 0 5px rgba(216,240,91,.12); }
.hero-index { position: absolute; z-index: 2; right: 20px; top: 45%; display: flex; flex-direction: column; align-items: center; gap: 12px; font-size: 10px; opacity: .7; }
.hero-index div { display: flex; flex-direction: column; gap: 5px; }
.hero-index i { display: block; width: 2px; height: 18px; background: rgba(255,255,255,.4); }
.hero-index i:first-child { background: var(--lime); }

.proof-strip { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); }
.proof-strip div { min-height: 150px; padding: 32px clamp(20px, 3.5vw, 56px); display: flex; flex-direction: column; justify-content: center; border-right: 1px solid var(--line); }
.proof-strip strong { font-size: clamp(30px, 4vw, 58px); letter-spacing: -.05em; }
.proof-strip sup { color: var(--orange); font-size: .5em; }
.proof-strip span { margin-top: 8px; font-size: 12px; opacity: .55; }

.section { padding: 120px clamp(24px, 8vw, 130px); }
.section-kicker { margin: 0 0 20px; color: var(--orange); }
.section-kicker.light { color: var(--lime); }
.intro { display: grid; grid-template-columns: 1.1fr .8fr; gap: 10vw; }
.intro h2, .section-head h2, .capability h2, .cert-intro h2, .contact h2 {
  margin: 0; font-size: clamp(38px, 5vw, 72px); line-height: 1.13; letter-spacing: -.045em;
}
.intro-copy { padding-top: 35px; }
.intro-copy p { margin: 0 0 22px; font-size: 16px; line-height: 1.9; color: rgba(16,21,17,.66); }
.intro-copy a { display: inline-flex; gap: 28px; margin-top: 10px; padding-bottom: 7px; font-weight: 700; border-bottom: 2px solid var(--ink); }

.solutions { color: white; background: var(--ink); }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 8vw; margin-bottom: 56px; }
.section-head > p { width: 440px; max-width: 40%; margin: 0 0 4px; color: rgba(255,255,255,.58); line-height: 1.8; }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.product-card { position: relative; min-height: 530px; overflow: hidden; background: #263129; }
.product-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .65s ease; filter: saturate(.72); }
.product-card:hover img { transform: scale(1.045); }
.product-overlay { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(6,10,7,.95), rgba(6,10,7,.05) 72%); }
.product-number { position: absolute; top: 22px; left: 24px; font-size: 11px; opacity: .6; }
.product-content { position: absolute; left: 28px; right: 26px; bottom: 30px; }
.product-content small { color: var(--lime); font-size: 10px; letter-spacing: .18em; }
.product-content h3 { margin: 10px 0 12px; font-size: 26px; }
.product-content p { width: 86%; margin: 0; color: rgba(255,255,255,.6); line-height: 1.7; font-size: 13px; }
.round-arrow { position: absolute; right: 0; bottom: 0; width: 42px; height: 42px; display: grid; place-items: center; border-radius: 50%; border: 1px solid rgba(255,255,255,.38); }

.capability { display: grid; grid-template-columns: 1fr 1fr; padding-left: 0; gap: clamp(50px, 8vw, 130px); align-items: center; }
.capability-media { position: relative; height: 680px; }
.capability-media img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.75); }
.media-label { position: absolute; right: -35px; bottom: 50px; padding: 25px 30px; background: var(--lime); }
.media-label span, .media-label strong { display: block; }
.media-label span { font-size: 9px; letter-spacing: .2em; opacity: .55; margin-bottom: 8px; }
.media-label strong { font-size: 16px; }
.process-list { margin-top: 58px; border-top: 1px solid var(--line); }
.process-item { display: grid; grid-template-columns: 60px 1fr; gap: 20px; padding: 23px 0; border-bottom: 1px solid var(--line); }
.process-item > span { color: var(--orange); font-size: 11px; }
.process-item strong { font-size: 17px; }
.process-item p { margin: 6px 0 0; color: rgba(16,21,17,.55); font-size: 13px; }

.certifications { background: #e8e5dc; }
.cert-intro { display: grid; grid-template-columns: 1fr 1.2fr 1fr; gap: 5vw; align-items: end; margin-bottom: 58px; }
.cert-intro .section-kicker { align-self: start; }
.cert-intro p:last-child { margin: 0; color: rgba(16,21,17,.56); line-height: 1.8; font-size: 13px; }
.cert-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.cert-card { min-height: 350px; background: white; display: grid; grid-template-columns: 1fr 46%; overflow: hidden; }
.cert-card > div { padding: 36px; display: flex; flex-direction: column; justify-content: end; }
.cert-card small { font-size: 9px; color: var(--orange); letter-spacing: .18em; }
.cert-card h3 { font-size: 38px; margin: 10px 0; }
.cert-card p { margin: 0; color: rgba(16,21,17,.55); font-size: 13px; }
.cert-card img { width: 100%; height: 100%; object-fit: cover; object-position: center; background: #ddd; }
.mine-safety { margin-top: 18px; padding: 44px; color: white; background: #18221b; }
.mine-safety { display: grid; grid-template-columns: .8fr 1.6fr auto; gap: 5vw; align-items: center; }
.mine-safety h3 { margin: 7px 0 10px; font-size: 28px; }
.mine-safety p { margin: 0; color: rgba(255,255,255,.58); line-height: 1.7; font-size: 12px; }
.model-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.model-list span { padding: 10px 12px; font: 11px Consolas, monospace; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.08); }
.text-button { color: var(--lime); border: 0; background: transparent; cursor: pointer; white-space: nowrap; }

.industry-band { height: 88px; display: flex; align-items: center; justify-content: center; gap: 28px; overflow: hidden; color: rgba(255,255,255,.32); background: #0d120e; }
.industry-band p { font-weight: 800; font-size: 13px; letter-spacing: .12em; white-space: nowrap; }
.industry-band i { width: 5px; height: 5px; border-radius: 50%; background: var(--lime); }

.contact { padding: 120px clamp(24px, 8vw, 130px); display: grid; grid-template-columns: 1.3fr .8fr; gap: 8vw; color: white; background: var(--orange); }
.contact .section-kicker { color: var(--ink); opacity: .65; }
.contact-panel { border-top: 1px solid rgba(255,255,255,.35); }
.contact-panel > * { position: relative; display: block; padding: 22px 40px 22px 0; border-bottom: 1px solid rgba(255,255,255,.35); }
.contact-panel small, .contact-panel strong { display: block; }
.contact-panel small { margin-bottom: 8px; color: rgba(255,255,255,.65); }
.contact-panel strong { font-size: 16px; }
.contact-panel span { position: absolute; right: 4px; top: 36px; font-size: 20px; }

footer { padding: 45px clamp(24px, 5vw, 80px); display: grid; grid-template-columns: 1fr 1fr auto; gap: 30px; align-items: center; color: white; background: var(--ink); }
.footer-brand { grid-row: span 2; }
footer p, footer > small { margin: 0; font-size: 11px; opacity: .5; }
footer > div { display: flex; gap: 25px; font-size: 12px; }

@media (max-width: 980px) {
  .site-header { height: 76px; }
  .menu-button { display: flex; flex-direction: column; gap: 6px; border: 0; background: transparent; }
  .menu-button i { display: block; width: 28px; height: 1px; background: white; }
  .nav { position: absolute; top: 76px; left: 0; right: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 20px 24px 28px; background: rgba(9,14,10,.98); }
  .nav.open { display: flex; }
  .nav a { padding: 14px 0; }
  .nav-cta { border: 0; }
  .hero { min-height: 720px; }
  .hero-content { margin-left: 24px; }
  .hero-card, .hero-index { display: none; }
  .proof-strip { grid-template-columns: repeat(2, 1fr); }
  .proof-strip div:nth-child(2) { border-right: 0; }
  .intro, .capability, .contact { grid-template-columns: 1fr; }
  .section { padding: 85px 24px; }
  .intro { gap: 30px; }
  .section-head { align-items: start; flex-direction: column; }
  .section-head > p { width: auto; max-width: none; }
  .product-grid { grid-template-columns: 1fr; }
  .product-card { min-height: 450px; }
  .capability { padding-left: 24px; }
  .capability-media { height: 520px; }
  .media-label { right: 0; }
  .cert-intro { grid-template-columns: 1fr; }
  .cert-cards { grid-template-columns: 1fr; }
  .mine-safety { grid-template-columns: 1fr; }
  footer { grid-template-columns: 1fr; }
  .footer-brand { grid-row: auto; }
}

@media (max-width: 600px) {
  .hero { height: 94svh; }
  .hero h1 { font-size: 54px; }
  .hero-copy { font-size: 15px; }
  .hero-actions { flex-direction: column; align-items: stretch; width: 100%; }
  .button { text-align: center; }
  .proof-strip div { min-height: 120px; padding: 24px 18px; }
  .proof-strip strong { font-size: 34px; }
  .capability-media { height: 400px; }
  .cert-card { grid-template-columns: 1fr 45%; min-height: 280px; }
  .cert-card > div { padding: 22px; }
  .cert-card h3 { font-size: 26px; }
  .mine-safety { padding: 28px 20px; }
  .model-list { grid-template-columns: repeat(2, 1fr); }
  .industry-band { justify-content: flex-start; padding-left: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}