:root{
  --navy:#07345a;
  --blue:#2d5f8f;
  --ink:#102640;
  --muted:#5d6f82;
  --line:#dbe5ef;
  --soft:#f4f8fb;
  --gold:#f4c400;
  --green:#5f8f7b;
  --white:#fff;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#fff;color:var(--ink);font-family:Arial,Helvetica,sans-serif;line-height:1.55}
img{max-width:100%;display:block}
a{color:inherit}
.container{width:min(calc(100% - 40px),var(--max));margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{display:flex;align-items:center;text-decoration:none;flex:0 0 auto}
.logo img{width:206px;height:auto}
.nav-links{display:flex;align-items:center;justify-content:flex-end;gap:14px;flex-wrap:wrap}
.nav-links a{font-size:16px;font-weight:700;text-decoration:none;color:var(--blue)}
.nav-links a:hover,.nav-links .active{color:var(--navy)}
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#f7fafc 0%,#fff 52%,#edf4f8 100%);border-bottom:1px solid var(--line)}
.home-hero,.au-hero,.ree-hero,.container-hero,.validation-hero{background-size:cover;background-position:center right}
.home-hero{background-image:linear-gradient(90deg,rgba(247,250,252,.97) 0%,rgba(247,250,252,.9) 42%,rgba(247,250,252,.55) 64%,rgba(247,250,252,.18) 100%),url("hero-main-lab-xrf.png")}
.au-hero{background-image:linear-gradient(90deg,rgba(247,250,252,.97) 0%,rgba(247,250,252,.9) 42%,rgba(247,250,252,.55) 64%,rgba(247,250,252,.18) 100%),url("hero-au-core-xrf.png")}
.ree-hero{background-image:linear-gradient(90deg,rgba(247,250,252,.97) 0%,rgba(247,250,252,.9) 42%,rgba(247,250,252,.55) 64%,rgba(247,250,252,.18) 100%),url("hero-ree-residue-xrf.png")}
.container-hero{background-image:linear-gradient(90deg,rgba(247,250,252,.97) 0%,rgba(247,250,252,.9) 42%,rgba(247,250,252,.55) 64%,rgba(247,250,252,.18) 100%),url("hero-container-lab.png")}
.validation-hero{background-image:linear-gradient(90deg,rgba(247,250,252,.97) 0%,rgba(247,250,252,.9) 42%,rgba(247,250,252,.55) 64%,rgba(247,250,252,.18) 100%),url("hero-validation-lab.png")}
.hero-inner{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(310px,.72fr);gap:38px;align-items:center;min-height:520px;padding:58px 0}
.eyebrow{margin:0 0 14px;color:var(--blue);font-size:13px;font-weight:800;letter-spacing:0;text-transform:uppercase}
h1,h2,h3{color:var(--navy);line-height:1.08}
h1{margin:0;font-size:44px;font-weight:700;letter-spacing:0}
h2{margin:0 0 18px;font-size:32px}
h3{margin:0 0 10px;font-size:21px}
p{color:var(--muted);font-size:17px}
.lead{max-width:760px;margin:20px 0 0;color:#28435d;font-size:21px;line-height:1.55}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:7px;border:1px solid var(--navy);font-weight:800;text-decoration:none}
.btn.primary{background:var(--navy);color:#fff}
.btn.secondary{background:#fff;color:var(--navy)}
.visual-panel{position:relative;display:grid;gap:14px;align-content:center;min-height:300px;border-left:1px solid var(--line);padding-left:30px}
.home-hero .visual-panel,.au-hero .visual-panel,.ree-hero .visual-panel,.container-hero .visual-panel,.validation-hero .visual-panel{border-left:0;padding-left:0;align-content:end}
.lab-card{position:relative;background:rgba(255,255,255,.88);border:1px solid rgba(219,229,239,.72);border-radius:8px;box-shadow:0 16px 36px rgba(18,52,82,.1)}
.lab-card.main{padding:18px 20px;width:min(330px,100%)}
.lab-card.small{width:min(230px,100%);padding:16px;margin-left:auto}
.hero .lab-card.main{background:rgba(255,255,255,.68);backdrop-filter:blur(8px);box-shadow:0 14px 32px rgba(18,52,82,.08)}
.hero .lab-card.main p{font-size:15px;line-height:1.45;margin-bottom:0}
.hero .lab-card.main h3{font-size:18px}
.home-hero .lab-card.main,.au-hero .lab-card.main,.ree-hero .lab-card.main,.container-hero .lab-card.main,.validation-hero .lab-card.main{margin-left:auto}
.home-hero .lab-card.small,.au-hero .lab-card.small,.ree-hero .lab-card.small,.container-hero .lab-card.small,.validation-hero .lab-card.small{display:none}
.chip{display:inline-flex;align-items:center;gap:8px;padding:7px 10px;border-radius:999px;background:#edf5f2;color:#315f4e;font-size:13px;font-weight:800}
.molecule{width:120px;height:86px;margin:8px 0 16px;position:relative}
.node{position:absolute;width:31px;height:31px;border-radius:50%;background:var(--navy)}
.node.n1{left:10px;top:30px}.node.n2{left:54px;top:5px}.node.n3{left:68px;top:55px}
.bond{position:absolute;height:7px;background:var(--navy);border-radius:99px;transform-origin:left center}.bond.b1{left:34px;top:42px;width:45px;transform:rotate(-42deg)}.bond.b2{left:73px;top:34px;width:36px;transform:rotate(82deg)}.bond.b3{left:35px;top:53px;width:48px;transform:rotate(34deg)}
.metric{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--navy);color:#fff}
.metric div{padding:22px;border-right:1px solid rgba(255,255,255,.15)}.metric div:last-child{border-right:0}
.metric strong{display:block;color:var(--gold);font-size:28px;line-height:1}.metric span{display:block;margin-top:6px;color:rgba(255,255,255,.82);font-size:14px}
.section{padding:68px 0}.section.soft{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:28px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid.two{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:24px;box-shadow:0 10px 26px rgba(9,32,66,.05)}
.card p{margin:0}.card h3+p{margin-top:0}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.step{background:#fff;border:1px solid var(--line);border-radius:8px;padding:20px}
.num{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--navy);color:#fff;font-weight:800;margin-bottom:14px}
.note{padding:18px 20px;background:#fff;border-left:4px solid var(--gold);border-top:1px solid var(--line);border-right:1px solid var(--line);border-bottom:1px solid var(--line);border-radius:6px;color:#28435d}
.split{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}
.chart-wrap{background:#fff;border:1px solid var(--line);border-radius:8px;padding:22px;box-shadow:0 10px 26px rgba(9,32,66,.05)}
.chart{width:100%;height:auto;display:block}
.legend{display:flex;flex-wrap:wrap;gap:14px;margin-top:12px;color:var(--muted);font-size:14px}
.key{display:inline-flex;align-items:center;gap:7px}.swatch{width:18px;height:3px;background:var(--navy);border-radius:2px}.swatch.gold{background:var(--gold)}
.contact-panel,.hero .lab-card.main.contact-panel{background:rgba(7,52,90,.96);color:#fff;backdrop-filter:none;box-shadow:0 18px 45px rgba(18,52,82,.16)}
.contact-panel h2,.contact-panel h3,.hero .lab-card.main.contact-panel h2,.hero .lab-card.main.contact-panel h3{color:#fff}
.contact-panel p,.hero .lab-card.main.contact-panel p{color:rgba(255,255,255,.82)}
.contact-list{display:grid;gap:12px}.contact-list div{border:1px solid rgba(255,255,255,.18);border-radius:7px;padding:15px 16px;background:rgba(255,255,255,.06)}.contact-list strong{display:block;color:var(--gold);margin-bottom:4px}.contact-list a,.contact-list span{color:#fff;text-decoration:none}
.footer{padding:32px 0;border-top:1px solid var(--line);color:var(--muted);font-size:14px}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}.footer img{width:160px}
@media(max-width:920px){
  .nav{align-items:flex-start;flex-direction:column;padding:12px 0}.nav-links{justify-content:flex-start}
  .hero-inner,.split,.grid,.grid.two{grid-template-columns:1fr}.hero-inner{min-height:0;padding:52px 0}.visual-panel{min-height:310px;border-left:0;padding-left:0}
  .steps{grid-template-columns:repeat(2,1fr)}.metric{grid-template-columns:repeat(2,1fr)}
  .home-hero,.au-hero,.ree-hero,.container-hero,.validation-hero{background-position:center right}
  h1{font-size:36px}h2{font-size:29px}
}
@media(max-width:560px){
  .container{width:min(calc(100% - 28px),var(--max))}.logo img{width:178px}.nav-links{gap:11px 14px}.nav-links a{font-size:14px}
  .home-hero{background-image:linear-gradient(180deg,rgba(247,250,252,.98) 0%,rgba(247,250,252,.92) 56%,rgba(247,250,252,.72) 100%),url("hero-main-lab-xrf.png");background-position:center bottom}
  .au-hero{background-image:linear-gradient(180deg,rgba(247,250,252,.98) 0%,rgba(247,250,252,.92) 56%,rgba(247,250,252,.72) 100%),url("hero-au-core-xrf.png");background-position:center bottom}
  .ree-hero{background-image:linear-gradient(180deg,rgba(247,250,252,.98) 0%,rgba(247,250,252,.92) 56%,rgba(247,250,252,.72) 100%),url("hero-ree-residue-xrf.png");background-position:center bottom}
  .container-hero{background-image:linear-gradient(180deg,rgba(247,250,252,.98) 0%,rgba(247,250,252,.92) 56%,rgba(247,250,252,.72) 100%),url("hero-container-lab.png");background-position:center bottom}
  .validation-hero{background-image:linear-gradient(180deg,rgba(247,250,252,.98) 0%,rgba(247,250,252,.92) 56%,rgba(247,250,252,.72) 100%),url("hero-validation-lab.png");background-position:center bottom}
  .actions{flex-direction:column}.btn{width:100%}.steps,.metric{grid-template-columns:1fr}.lab-card.main{width:100%}.lab-card.small{margin-left:0;width:100%}.visual-panel{min-height:0}.hero-inner{gap:26px}
  h1{font-size:30px}h2{font-size:26px}.lead{font-size:18px}
}