:root{--navy:#06172b;--navy2:#0a2745;--blue:#47c9ff;--ink:#11283d;--muted:#607281;--line:#dae5ec;--soft:#f2f7fa;--white:#fff;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font:16px/1.65 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:#fff}a{color:inherit;text-decoration:none}.wrap{width:min(calc(100% - 40px),var(--max));margin:auto}header{position:absolute;z-index:10;inset:0 0 auto;border-bottom:1px solid #ffffff24}nav{height:94px;display:flex;align-items:center;justify-content:space-between;color:#fff}.logo{width:226px;display:block}.navlinks{display:flex;align-items:center;gap:27px;color:#d9e7f1;font-size:.9rem}.navlinks a:hover,.lang button:hover{color:var(--blue)}.lang{display:flex;align-items:center;gap:6px;border-left:1px solid #ffffff35;padding-left:20px}.lang button{border:0;background:none;color:#a7bbc9;padding:3px;cursor:pointer;font:inherit}.lang button.active{color:#fff;font-weight:800}.hero,.subhero{position:relative;color:#fff;background:linear-gradient(90deg,#031426fa 0%,#031426df 43%,#03142638 78%),url('assets/optiva-hero.png') center/cover no-repeat}.hero{min-height:740px;display:flex;align-items:center}.subhero{min-height:520px;display:flex;align-items:flex-end}.subhero.fss{background-image:linear-gradient(90deg,#031426fa 0%,#031426e8 42%,#03142642 78%),url("assets/hero-fss.png")}.subhero.als{background-image:linear-gradient(90deg,#031426fa 0%,#031426e8 42%,#03142642 78%),url("assets/hero-als.png")}.hero-copy{max-width:740px;padding-top:70px;position:relative}.subhero .hero-copy{padding:170px 0 82px}.eyebrow,.kicker{display:block;color:var(--blue);font-size:.76rem;font-weight:800;letter-spacing:.17em;text-transform:uppercase}.hero h1,.subhero h1{font-size:clamp(2.65rem,6vw,5.4rem);line-height:1;letter-spacing:-.055em;margin:20px 0 24px}.subhero h1{font-size:clamp(2.5rem,5vw,4.6rem);max-width:900px}.hero h1 span{color:var(--blue)}.hero p,.subhero p{color:#d0e0ea;font-size:1.15rem;max-width:700px;margin:0 0 32px}.btn{display:inline-flex;align-items:center;gap:12px;background:var(--blue);color:var(--navy);padding:14px 21px;border-radius:3px;font-weight:800}.btn:after{content:'→';font-size:1.2em}.btn:hover{background:#8addff}section{padding:96px 0}.section-head{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;margin-bottom:50px}.section-head h2,.content h2,.cta h2{font-size:clamp(2rem,4vw,3.3rem);line-height:1.08;letter-spacing:-.045em;margin:10px 0 0}.section-head p,.lead{color:var(--muted);font-size:1.06rem;margin:0;max-width:690px}.challenge,.applications,.process{background:var(--soft)}.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.card{background:#fff;border:1px solid var(--line);padding:30px 25px;min-height:230px}.card:hover{transform:translateY(-3px);border-color:#9bddf8;box-shadow:0 14px 36px #0a244110}.num{color:#159ad2;font-size:.76rem;font-weight:800}.card h3{line-height:1.28;margin:30px 0 10px}.card p{color:var(--muted);font-size:.93rem;margin:0}.solutions{background:var(--navy);color:#fff}.solutions .section-head p{color:#b8cad7}.solution-list{border-top:1px solid #29435b}.solution{display:grid;grid-template-columns:58px 1fr 1.15fr 34px;gap:28px;align-items:center;padding:27px 4px;border-bottom:1px solid #29435b}.solution.link:hover{background:#ffffff05}.solution .n,.solution .arrow{color:var(--blue)}.solution h3,.solution p{margin:0}.solution p{color:#b8cad7;font-size:.92rem}.solution .arrow{font-size:1.35rem}.solution.muted .arrow{opacity:.25}.value-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}.value{background:#fff;padding:28px 22px}.icon{width:38px;height:38px;border:1px solid #9cddf7;border-radius:50%;display:grid;place-items:center;color:#159ad2;font-weight:800}.value b{display:block;line-height:1.25;margin:18px 0 9px}.value p{color:var(--muted);font-size:.89rem;margin:0}.app-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.app{min-height:285px;color:#fff;padding:23px;display:flex;flex-direction:column;justify-content:flex-end;background-position:center;background-size:cover;position:relative;overflow:hidden}.app:after{content:'';position:absolute;inset:0;background:linear-gradient(transparent 15%,#031426e8)}.app>*{position:relative;z-index:1}.app small{color:var(--blue);font-weight:800}.app h3{font-size:1.1rem;line-height:1.25;margin:7px 0}.app.geo{background-image:url('assets/industry-geothermal.png')}.app.oil{background-image:url('assets/industry-oil-gas.png')}.app.mine{background-image:url('assets/industry-mining.png')}.app.sea{background-image:url('assets/industry-maritime.png')}.app.plant{background-image:url('assets/industry-industrial.png')}.content-grid{display:grid;grid-template-columns:.72fr 1.28fr;gap:90px}.content h2{margin-top:0}.content p{color:var(--muted)}.points{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:28px}.point{padding:23px;border:1px solid var(--line);background:#fff}.point b{display:block;margin-bottom:5px}.point span{font-size:.91rem;color:var(--muted)}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin-top:38px}.step{background:#fff;border-top:3px solid var(--blue);padding:25px}.step small{color:#159ad2;font-weight:800}.step h3{margin:14px 0 8px}.step p{margin:0;color:var(--muted);font-size:.92rem}.note{margin-top:28px;border-left:3px solid var(--blue);padding:12px 20px;color:var(--muted)}.cta{background:linear-gradient(135deg,#071a31,#0c365b);color:#fff}.cta-inner{display:flex;justify-content:space-between;align-items:center;gap:50px}.cta h2{max-width:680px;margin:10px 0 18px}.cta p{color:#c0d1dd;max-width:700px}.contacts{display:flex;gap:28px;flex-wrap:wrap;margin-top:25px}.contact small{display:block;color:#7fa2ba;text-transform:uppercase;letter-spacing:.12em;font-size:.7rem;font-weight:800}.contact span,.contact a{font-weight:650}.address{max-width:440px}footer{background:#04111f;color:#8fa5b5;padding:43px 0}.foot{display:flex;justify-content:space-between;align-items:flex-end;gap:30px}.foot .logo{width:245px}.legal{text-align:right;font-size:.81rem}.legal p{margin:3px 0}.back{display:inline-block;margin-bottom:22px;color:var(--blue);font-weight:700}.tagrow{display:flex;gap:9px;flex-wrap:wrap;margin-top:25px}.tag{border:1px solid var(--line);padding:8px 12px;color:var(--muted);font-size:.87rem}
@media(max-width:900px){.navlinks>a{display:none}.navlinks{gap:10px}.lang{padding-left:12px}.section-head,.content-grid{grid-template-columns:1fr;gap:24px}.grid4{grid-template-columns:1fr 1fr}.solution{grid-template-columns:40px 1fr 24px}.solution p{grid-column:2/4}.value-grid,.app-grid,.steps{grid-template-columns:1fr 1fr}.cta-inner,.foot{align-items:flex-start;flex-direction:column}.legal{text-align:left}}@media(max-width:560px){.wrap{width:min(calc(100% - 28px),var(--max))}nav{height:80px}.logo{width:176px}.hero{min-height:660px}.hero h1{font-size:2.7rem}section{padding:70px 0}.grid4,.value-grid,.app-grid,.points,.steps{grid-template-columns:1fr}.solution{gap:12px}.app{min-height:250px}.subhero{min-height:480px}.subhero .hero-copy{padding:145px 0 65px}}