*{box-sizing:border-box;margin:0;padding:0}
:root{--navy:#071a2b;--blue:#16a8e8;--cyan:#38c9ef;--green:#39c48b;--text:#112536;--muted:#667785;--soft:#f3f8fb;--white:#fff;--border:#dce8ee}
html{scroll-behavior:smooth}
body{font-family:Inter,Arial,sans-serif;color:var(--text);background:#fff;line-height:1.65}
h1,h2,h3,h4{font-family:Manrope,Inter,sans-serif;line-height:1.12}
a{text-decoration:none;color:inherit}
.container{width:min(1180px,92%);margin:auto}
.site-header{height:78px;position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(20,50,70,.08)}
.nav-wrap{height:100%;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;font-family:Manrope;font-size:22px;font-weight:800;letter-spacing:-.7px}
.brand>span:last-child>span{color:var(--blue)}
.brand-mark{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,#0879c9,#28cbe5);font-size:18px}
.nav{display:flex;align-items:center;gap:27px;font-size:13px;font-weight:600;color:#314653}
.nav a{transition:.2s}.nav a:hover{color:var(--blue)}
.nav-cta{padding:11px 19px;border-radius:25px;background:var(--navy);color:#fff!important}
.menu-toggle{display:none;border:0;background:none}
.hero{height:760px;position:relative;display:flex;align-items:center;color:#fff;overflow:hidden}
.hero-image{position:absolute;inset:0;background-image:url('https://images.unsplash.com/photo-1497435334941-8c899ee9e8e9?auto=format&fit=crop&w=2200&q=85');background-size:cover;background-position:center}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(4,20,34,.93) 0%,rgba(4,20,34,.72) 48%,rgba(4,20,34,.25) 100%)}
.hero-content{position:relative;padding-top:75px;max-width:1180px}
.eyebrow{color:#0796d5;font-size:11px;letter-spacing:2.2px;font-weight:800;margin-bottom:17px}
.eyebrow.light{color:#6edcff}
.hero h1{font-size:clamp(46px,6vw,78px);max-width:850px;letter-spacing:-3.5px;margin-bottom:24px}
.hero h1 span,h2 span{color:var(--cyan)}
.hero p{max-width:630px;font-size:18px;color:#d7e5eb;margin-bottom:34px}
.hero-actions{display:flex;gap:13px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:12px;padding:14px 22px;border-radius:30px;font-size:13px;font-weight:700;transition:.25s;border:1px solid transparent}
.btn-primary{background:linear-gradient(135deg,#0aa3e4,#36c7df);color:#fff;box-shadow:0 12px 30px rgba(0,160,220,.22)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 35px rgba(0,160,220,.3)}
.btn-ghost{border-color:rgba(255,255,255,.3);color:#fff;background:rgba(255,255,255,.06)}
.btn-ghost:hover{background:rgba(255,255,255,.13)}
.hero-stats{display:flex;gap:50px;margin-top:75px}.hero-stats div{display:flex;flex-direction:column}.hero-stats strong{font:700 24px Manrope}.hero-stats small{color:#b7cad4;font-size:11px;margin-top:3px}
.trust-strip{background:var(--navy);color:#91a9b7}.trust-inner{display:flex;justify-content:space-between;gap:20px;padding:18px 0;font-size:9px;font-weight:700;letter-spacing:1.6px}
.section{padding:105px 0}.soft{background:var(--soft)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:75px;align-items:center}
h2{font-size:clamp(35px,4vw,53px);letter-spacing:-2px;margin-bottom:22px}.lead{font-size:18px;color:#506471;margin-bottom:18px}.two-col p:not(.lead){color:var(--muted);max-width:570px}
.text-link{display:inline-flex;gap:9px;color:#078fce;font-weight:700;font-size:13px;margin-top:28px}
.photo-card{min-height:500px;border-radius:30px;position:relative;overflow:hidden;background-size:cover;background-position:center}
.about-photo{background-image:url('https://images.unsplash.com/photo-1500534623283-312aade485b7?auto=format&fit=crop&w=1200&q=85')}
.about-photo:after,.product-photo:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(3,22,35,.6))}
.floating-card{position:absolute;z-index:2;bottom:25px;left:25px;right:25px;padding:18px 20px;background:rgba(255,255,255,.94);color:var(--text);border-radius:17px;font-size:12px;box-shadow:0 15px 35px rgba(0,0,0,.15)}
.floating-card strong{display:block;font-size:16px;margin-top:3px}.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--green);margin-right:8px}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:50px;margin-bottom:45px}.section-head h2{max-width:650px}.section-head>p{max-width:380px;color:var(--muted);font-size:14px}
.solution-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:17px}.solution-card{background:#fff;border:1px solid var(--border);padding:30px 25px;border-radius:22px;min-height:285px;transition:.3s}.solution-card:hover{transform:translateY(-7px);box-shadow:0 20px 45px rgba(12,49,70,.1)}.icon{width:46px;height:46px;border-radius:14px;background:#e9f8fd;color:#058dcc;display:grid;place-items:center;font-weight:800;font-size:13px;margin-bottom:30px}.solution-card h3{font-size:21px;margin-bottom:12px}.solution-card p{font-size:13px;color:var(--muted);margin-bottom:22px}.solution-card span{font-size:10px;line-height:1.6;color:#168cb9;font-weight:700}
.dark-section{background:var(--navy);color:#fff}.product-layout{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:center}.product-photo{background-image:url('https://images.unsplash.com/photo-1518770660439-4636190af475?auto=format&fit=crop&w=1300&q=85');min-height:560px}.product-badge{position:absolute;z-index:2;top:25px;left:25px;padding:9px 14px;border-radius:20px;background:rgba(255,255,255,.12);backdrop-filter:blur(10px);font-size:11px;letter-spacing:1px}.product-copy>p{color:#aebfc8;max-width:520px;margin-bottom:35px}.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:38px}.spec-grid div{border-top:1px solid rgba(255,255,255,.12);padding-top:13px}.spec-grid strong{color:var(--cyan);font-size:11px;margin-right:10px}.spec-grid span{font-size:12px;color:#c4d1d7}
.application-grid{display:grid;grid-template-columns:1.35fr .65fr .65fr;grid-template-rows:270px 270px;gap:15px}.application-card{border-radius:23px;overflow:hidden;position:relative;background-size:cover;background-position:center;display:flex;align-items:end;color:#fff}.application-card:before{content:"";position:absolute;inset:0;background:linear-gradient(transparent 25%,rgba(3,18,29,.85))}.application-card>div{position:relative;padding:25px}.application-card small{font-size:10px;color:#7fdbf5;font-weight:800}.application-card h3{font-size:25px;margin:7px 0}.application-card p{font-size:11px;color:#d4e0e5;max-width:310px}.city{grid-row:span 2;background-image:url('https://images.unsplash.com/photo-1477959858617-67f85cf4f1df?auto=format&fit=crop&w=1300&q=85')}.industry{background-image:url('https://images.unsplash.com/photo-1581092160607-ee22621dd758?auto=format&fit=crop&w=900&q=85')}.campus{background-image:url('https://images.unsplash.com/photo-1564981797816-1043664bf78d?auto=format&fit=crop&w=900&q=85')}.residential{grid-column:2/4;background-image:url('https://images.unsplash.com/photo-1449824913935-59a10b8d2000?auto=format&fit=crop&w=1100&q=85')}
.center-head{text-align:center;max-width:680px;margin:0 auto 65px}.center-head p{color:var(--muted);font-size:14px}
.tech-flow{display:grid;grid-template-columns:1fr auto 1fr auto 1fr auto 1fr;align-items:center}.tech-step{text-align:center}.step-no{width:58px;height:58px;margin:0 auto 20px;border-radius:50%;display:grid;place-items:center;background:#fff;border:1px solid #cfe7ef;color:#0797d3;font-weight:800;font-size:12px}.tech-step h3{font-size:20px;margin-bottom:9px}.tech-step p{font-size:12px;color:var(--muted);max-width:190px;margin:auto}.flow-line{height:1px;width:65px;background:#cfe1e8}
.gallery-grid{display:grid;grid-template-columns:1.3fr .7fr .7fr;grid-template-rows:240px 240px;gap:15px}.gallery-item{border-radius:20px;background-size:cover;background-position:center;position:relative;overflow:hidden;display:flex;align-items:end}.gallery-item:after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 45%,rgba(0,0,0,.65))}.gallery-item span{position:relative;z-index:2;color:#fff;font-size:11px;font-weight:700;padding:20px}.g1{grid-row:span 2;background-image:url('https://images.unsplash.com/photo-1531058020387-3be344556be6?auto=format&fit=crop&w=1200&q=85')}.g2{background-image:url('https://images.unsplash.com/photo-1497366754035-f200968a6e72?auto=format&fit=crop&w=900&q=85')}.g3{background-image:url('https://images.unsplash.com/photo-1518770660439-4636190af475?auto=format&fit=crop&w=900&q=85')}.g4{background-image:url('https://images.unsplash.com/photo-1441974231531-c6227db76b6e?auto=format&fit=crop&w=900&q=85')}.g5{background-image:url('https://images.unsplash.com/photo-1551288049-bebda4e38f71?auto=format&fit=crop&w=900&q=85')}
.cta-section{min-height:500px;position:relative;color:#fff;display:flex;align-items:center;overflow:hidden}.cta-bg{position:absolute;inset:0;background-image:linear-gradient(90deg,rgba(4,23,38,.94),rgba(4,23,38,.6)),url('https://images.unsplash.com/photo-1470252649378-9c29740c9fa8?auto=format&fit=crop&w=2200&q=85');background-size:cover;background-position:center}.cta-content{position:relative}.cta-content h2{font-size:clamp(42px,5vw,65px);max-width:720px}.cta-content p{color:#c5d4db;max-width:560px;margin-bottom:28px}
.footer{background:#061522;color:#a6b9c3;padding:65px 0 20px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:40px;padding-bottom:55px}.footer-brand{color:#fff;margin-bottom:17px}.footer-grid>div>p{font-size:12px;max-width:300px}.footer h4{color:#fff;font-size:12px;margin-bottom:17px}.footer-grid a:not(.brand){display:block;font-size:11px;margin:9px 0;color:#91a7b2}.footer-grid a:hover{color:#52d0f0}.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:20px;display:flex;justify-content:space-between;font-size:9px;color:#6e8793}
@media(max-width:900px){.nav{display:none;position:absolute;top:78px;left:4%;right:4%;background:#fff;padding:20px;border-radius:18px;box-shadow:0 20px 45px rgba(0,0,0,.12);flex-direction:column;align-items:stretch}.nav.open{display:flex}.menu-toggle{display:flex;flex-direction:column;gap:5px}.menu-toggle span{width:24px;height:2px;background:var(--navy)}.solution-grid{grid-template-columns:1fr 1fr}.two-col,.product-layout{grid-template-columns:1fr;gap:40px}.about-photo,.product-photo{min-height:400px}.application-grid{grid-template-columns:1fr 1fr;grid-template-rows:250px 250px}.city{grid-row:auto}.residential{grid-column:auto}.tech-flow{grid-template-columns:1fr 1fr;gap:35px}.flow-line{display:none}.gallery-grid{grid-template-columns:1fr 1fr;grid-template-rows:220px 220px 220px}.g1{grid-row:span 2}.footer-grid{grid-template-columns:1.5fr 1fr 1fr}}
@media(max-width:600px){.site-header{height:68px}.nav{top:68px}.hero{height:720px}.hero h1{letter-spacing:-2px}.hero p{font-size:15px}.hero-stats{gap:20px;margin-top:50px}.hero-stats small{font-size:9px}.trust-inner{overflow:hidden;white-space:nowrap;gap:30px}.section{padding:75px 0}.section-head{display:block}.section-head>p{margin-top:18px}.solution-grid{grid-template-columns:1fr}.application-grid,.gallery-grid{grid-template-columns:1fr;grid-template-rows:240px}.g1{grid-row:auto}.gallery-item{min-height:220px}.tech-flow{grid-template-columns:1fr}.spec-grid{gap:18px}.footer-grid{grid-template-columns:1fr 1fr}.footer-bottom{display:block}.footer-bottom span{display:block;margin:5px 0}.hero-actions .btn{width:100%;justify-content:center}}

.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.show{opacity:1;transform:none}

/* Official SENSurAir logo */
.brand-logo{display:flex;align-items:center}
.brand-logo img{display:block;width:205px;height:auto;max-height:52px;object-fit:contain}
.footer-brand img{width:190px;max-height:55px}
@media(max-width:600px){.brand-logo img{width:170px;max-height:45px}.footer-brand img{width:175px}}