:root{--ink:#07162f;--blue:#0a4b8e;--electric:#1479d5;--red:#dc2b35;--paper:#f4f7fa;--line:#cad4df;--white:#fff}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 'DM Sans',sans-serif}
a{color:inherit;text-decoration:none}
button{font:inherit}
.nav-wrap{height:78px;position:absolute;z-index:10;top:0;left:0;width:100%;display:flex;align-items:center;justify-content:space-between;padding:0 5vw;color:#fff;border-bottom:1px solid #ffffff2c}
.brand{display:flex;align-items:baseline;gap:9px;font:800 1.45rem/1 Manrope,sans-serif;letter-spacing:.05em}
.brand-a{color:var(--red)}
.brand small{font:700 .62rem Manrope,sans-serif;letter-spacing:.2em}
.nav-wrap nav{display:flex;align-items:center;gap:2rem;font-size:.88rem}
.header-actions{display:flex;align-items:center;gap:1.25rem}
.language-switcher{display:flex;align-items:center;border:1px solid #ffffff42;border-radius:2px;overflow:hidden}
.language-switcher button{border:0;border-right:1px solid #ffffff32;background:transparent;color:#c5d2df;padding:.48rem .55rem;min-width:40px;font-size:.7rem;font-weight:700;letter-spacing:.04em;cursor:pointer;transition:.2s}
.language-switcher button:last-child{border-right:0}
.language-switcher button:hover,.language-switcher button.active{background:#fff;color:var(--ink)}
.nav-cta{border:1px solid #ffffff66;padding:.65rem 1rem}
.menu{display:none;background:none;border:0}
.hero{height:min(870px,100vh);min-height:700px;background:#b9d8ee url('assets/hero-lightweight-flight.png') center center/cover no-repeat;color:var(--ink);position:relative;overflow:hidden;padding:146px 5vw 55px;display:grid;grid-template-columns:minmax(360px, .82fr) 1.18fr}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#f6f9fdf7 0%,#f6f9fdeb 34%,#f6f9fd9e 45%,#f6f9fd12 62%,transparent 100%),linear-gradient(180deg,#edf5fb45 0%,transparent 62%,#07162f24 100%)}
.hero-copy{position:relative;z-index:2;grid-column:1;align-self:center;justify-self:start;max-width:610px;padding-bottom:2.5rem}
.eyebrow,.section-tag{text-transform:uppercase;letter-spacing:.2em;font-size:.72rem;font-weight:700}
.eyebrow{display:flex;align-items:center;gap:12px;color:#4f6680}
.eyebrow span{width:24px;height:1px;background:var(--red)}
h1,h2,h3{font-family:Manrope,sans-serif;margin:0;line-height:1.08}
h1{font-size:clamp(3.35rem,5.6vw,6rem);letter-spacing:-.06em;margin:1.8rem 0 1.4rem;max-width:760px}
.lead{font-size:clamp(1.05rem,1.35vw,1.25rem);line-height:1.6;color:#385069;max-width:540px}
.hero-actions{display:flex;align-items:center;gap:2rem;margin-top:2.4rem}
.button{padding:1rem 1.25rem;font-weight:600}
.primary{background:var(--red);color:white}
.primary b{margin-left:25px}
.text-link{font-weight:600;border-bottom:1px solid #173b6055;padding:.8rem 0}
.text-link span{margin-left:18px}
.stat-card{position:absolute;z-index:2;bottom:76px;right:5vw;background:#fffffff0;color:var(--ink);padding:1.15rem 1.4rem;display:flex;flex-direction:column;box-shadow:0 16px 40px #17314a2e;backdrop-filter:blur(12px)}
.stat-card strong{font:800 2.2rem Manrope}
.stat-card span{font-size:.72rem;text-transform:uppercase;letter-spacing:.12em}
.hero-foot{position:absolute;bottom:26px;left:5vw;right:5vw;display:flex;justify-content:space-between;color:#405a73;text-transform:uppercase;letter-spacing:.14em;font-size:.64rem}
.intro,.approach{padding:110px 7vw}
.section-tag{color:var(--blue);margin-bottom:3.5rem}
.section-tag.light{color:#8fc2f2}
.intro-copy{display:grid;grid-template-columns:1.2fr 1fr;gap:8vw}
.intro-copy h2,.approach h2,.cert h2{font-size:clamp(2.6rem,5vw,5.2rem);letter-spacing:-.05em}
.intro-copy p{font-size:1.15rem;color:#536274;margin:0;max-width:620px}
.principles{display:grid;grid-template-columns:repeat(3,1fr);margin-top:100px;border-top:1px solid var(--line)}
.principles article{padding:35px 6vw 20px 0;border-right:1px solid var(--line);min-height:210px}
.principles article+article{padding-left:3vw}
.principles b,.solution-no{font-size:.72rem;color:var(--electric)}
.principles h3{font-size:1.25rem;margin:2rem 0 .7rem}
.principles p{color:#687687;margin:0}
.solutions{background:#0a2342;color:#fff;padding:110px 7vw}
.solutions-head{display:flex;justify-content:space-between;align-items:end;margin-bottom:70px}
.solutions-head h2{font-size:clamp(2.8rem,5vw,5.4rem);letter-spacing:-.05em}
.solutions-head p{max-width:400px;color:#aebed0}
.solution{display:grid;grid-template-columns:70px 1fr 140px;gap:1rem;border-top:1px solid #ffffff25;padding:32px 0;align-items:center;transition:.3s}
.solution:last-child{border-bottom:1px solid #ffffff25}
.solution h3{font-size:2rem;margin-bottom:.6rem}
.solution p{color:#b8c7d7;max-width:720px;margin:.4rem 0}
.solution div>span{font-size:.76rem;text-transform:uppercase;letter-spacing:.12em;color:#7095b8}
.solution-icon{font:300 3rem Manrope;text-align:right;color:#79b9f2}
.solution:hover{padding-left:12px;background:#ffffff05}
.approach-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:9vw}
.lead-dark{font-size:1.2rem;color:#526172;max-width:580px}
.steps{display:grid;grid-template-columns:1fr 1fr}
.steps div{padding:28px;border-top:1px solid var(--line);min-height:190px}
.steps div:nth-child(odd){border-right:1px solid var(--line)}
.steps span{color:var(--red);font-size:.72rem}
.steps h3{margin:1.3rem 0 .7rem}
.steps p{color:#687687;margin:0}
.cert{padding:110px 7vw;background:#e7edf3;display:grid;grid-template-columns:.85fr 1.15fr;gap:8vw;align-items:center}
.goodwe{font:800 1.55rem Manrope;color:var(--red);letter-spacing:.05em;margin:0 0 1rem}
.cert-copy>p:not(.goodwe){color:#536274;font-size:1.1rem;max-width:520px}
.validity{border-top:1px solid #bbc8d5;margin-top:2.5rem;padding-top:1rem;display:flex;gap:2rem}
.validity span{font-size:.7rem;letter-spacing:.16em}
.validity strong{font-size:.78rem}
.certificate{position:relative;border:0;background:#fff;padding:18px;box-shadow:0 22px 55px #19334f24;cursor:pointer;transform:rotate(1.5deg);transition:.3s}
.certificate:hover{transform:rotate(0) translateY(-4px)}
.certificate img{width:100%;display:block}
.certificate span{position:absolute;right:18px;bottom:18px;background:var(--ink);color:#fff;padding:.7rem 1rem;font-size:.75rem}
.contact{padding:110px 7vw;background:var(--ink);color:white;display:grid;grid-template-columns:1fr;gap:0}
.contact-main{display:grid;grid-template-columns:1.15fr .85fr;gap:8vw;align-items:end;padding-bottom:65px;border-bottom:1px solid #ffffff20}
.contact h2{font-size:clamp(3.4rem,6vw,6.5rem);letter-spacing:-.06em;margin-bottom:0}
.contact-links{display:flex;flex-direction:column;align-items:flex-start;gap:1.25rem;padding-bottom:.8rem}
.contact-links>a{font-size:1.15rem;border-bottom:1px solid #ffffff50;padding-bottom:.5rem}
.contact-links>a span{margin-left:20px;color:#70b9fa}
.contact-details{display:grid;grid-template-columns:.7fr .8fr .8fr 1.55fr 1.9fr;gap:1.2rem;align-items:start}
.contact-details>div{min-width:0;padding-left:18px;border-left:1px solid #ffffff20}
.contact-details small{display:block;color:#7490aa;letter-spacing:.15em;font-size:.65rem;margin-bottom:.6rem}
.contact-details strong,.contact-details a,.contact-details address{font-style:normal;font-weight:500;color:#e6edf4}
.contact-details strong span{display:block;color:#91a7bb;font-size:.82rem;margin-top:.25rem}
footer{background:#040e1e;color:#8495a6;padding:30px 5vw;display:flex;justify-content:space-between;align-items:center;font-size:.72rem;border-top:1px solid #ffffff16}
.foot-brand{color:white}
.foot-brand+p{text-transform:uppercase;letter-spacing:.13em}
dialog{border:0;padding:15px;max-width:min(92vw,1100px);background:#fff;box-shadow:0 20px 80px #0009}
dialog::backdrop{background:#020815dd}
dialog img{max-width:100%;display:block}
dialog button{position:absolute;right:22px;top:20px;width:42px;height:42px;border:0;background:var(--ink);color:#fff;font-size:1.7rem;cursor:pointer}
.reveal{opacity:0;transform:translateY(18px);transition:.7s ease}
.reveal.visible{opacity:1;transform:none}
@media(max-width:1050px){.nav-wrap nav{gap:1rem;font-size:.78rem}.header-actions{gap:.8rem}.language-switcher button{min-width:36px;padding:.45rem .42rem}}
@media(max-width:800px){.nav-wrap{height:68px}
.nav-wrap nav{display:none;position:absolute;top:68px;left:0;width:100%;background:var(--ink);padding:1.5rem 5vw;flex-direction:column;align-items:flex-start}
.nav-wrap nav.open{display:flex}
.header-actions{margin-left:auto}
.language-switcher button{min-width:38px;padding:.48rem .45rem}
.menu{display:flex;flex-direction:column;gap:7px;padding:10px}
.menu span{display:block;width:25px;height:1px;background:white}
.hero{height:auto;min-height:810px;grid-template-columns:1fr;padding:116px 6vw 128px;background-position:64% center;color:#fff}
.hero::before{background:linear-gradient(180deg,#07162fbd 0%,#07162f75 42%,#07162f38 58%,#07162fe8 100%),linear-gradient(90deg,#07162f8f 0%,transparent 86%)}
.hero-copy{z-index:3}
.hero-copy{grid-column:1;justify-self:start;align-self:end;max-width:560px;padding:1.35rem 1.25rem 1.5rem;background:#07162fb3;backdrop-filter:blur(9px);border:1px solid #ffffff24}
.hero .eyebrow{color:#c2d6e8}
.hero .lead{color:#d7e2ec}
.hero .text-link{border-bottom-color:#ffffff66}
h1{font-size:clamp(3.2rem,15vw,4.8rem)}
.stat-card{bottom:35px;right:6vw;padding:.85rem 1rem}
.hero-foot{display:none}
.intro,.solutions,.approach,.cert,.contact{padding:80px 6vw}
.intro-copy,.approach-grid,.cert,.contact{grid-template-columns:1fr}
.intro-copy{gap:2rem}
.principles{grid-template-columns:1fr;margin-top:65px}
.principles article,.principles article+article{padding:28px 0;border-right:0;border-bottom:1px solid var(--line);min-height:0}
.solutions-head{display:block}
.solution{grid-template-columns:40px 1fr}
.solution-icon{display:none}
.steps{margin-top:3rem}
.steps div{padding:20px 15px}
.certificate{margin-top:20px}
.contact-details{margin-top:3rem}
.contact h2{font-size:3.5rem}
footer{align-items:flex-start;gap:1.5rem;flex-direction:column}
.foot-brand+p{display:none}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}
.reveal{opacity:1;transform:none;transition:none}
}

/* Product systems */
.products{padding:110px 7vw;background:#fff}
.products-head,.projects-head,.references-head{display:flex;justify-content:space-between;align-items:end;gap:5vw;margin-bottom:60px}
.products-head h2,.projects h2{font-size:clamp(2.6rem,4.7vw,5rem);letter-spacing:-.05em}
.products-head>p,.projects-head>p,.references-head>p{max-width:470px;color:#5c6b7b}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.product-card{background:#f7f9fb;padding:36px;min-height:510px;display:flex;flex-direction:column}
.product-card.feature{background:var(--ink);color:#fff}
.product-top{display:flex;justify-content:space-between;gap:1rem;font-size:.7rem;letter-spacing:.12em;color:#66809b}
.product-top strong{color:var(--red)}
.product-card h3{font-size:2.2rem;margin:3rem 0 1.2rem}
.product-card p{color:#5d6b7b}
.product-card.feature p{color:#b9c7d5}
.product-card ul{list-style:none;padding:0;margin:1rem 0 2.2rem;border-top:1px solid #cfd8e1}
.product-card.feature ul{border-color:#ffffff2d}
.product-card li{padding:.65rem 0;border-bottom:1px solid #cfd8e1;font-size:.85rem}
.product-card.feature li{border-color:#ffffff2d}
.product-card>a{margin-top:auto;font-weight:700;font-size:.8rem;color:var(--blue)}
.product-card.feature>a{color:#89c7ff}

/* Project experience */
.projects{padding:110px 7vw;background:#081a33;color:#fff}
.projects .projects-head>p,.projects .references-head>p{color:#b1c2d3}
.project-kicker{font-size:.7rem;letter-spacing:.18em;color:#78bffc;font-weight:700;margin:0 0 .8rem}
.luban-projects{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.project-card{background:#102a49;overflow:hidden}
.project-card img{width:100%;height:300px;object-fit:cover;display:block}
.concept-image{position:relative}
.concept-image small{position:absolute;left:14px;bottom:14px;background:#07162fdd;color:#fff;padding:.4rem .6rem;font-size:.58rem;letter-spacing:.14em}
.project-copy{padding:28px}
.project-copy span,.reference-card span{font-size:.68rem;letter-spacing:.15em;color:#7db7ea}
.project-copy h3{font-size:clamp(1.6rem,2.5vw,2.5rem);margin:.8rem 0}
.project-copy p{color:#b5c4d4;max-width:700px}
.project-copy b{font-size:.68rem;letter-spacing:.14em;color:#fff}
.references-head{margin-top:100px}
.reference-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.reference-card{position:relative;min-height:330px;overflow:hidden;background:#0f2a4b}
.reference-card img{width:100%;height:100%;position:absolute;inset:0;object-fit:cover;transition:.5s}
.reference-card:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 22%,#061426ec 100%)}
.reference-card>div{position:relative;z-index:1;padding:210px 28px 25px}
.reference-card h3{font-size:1.55rem;margin:.55rem 0}
.reference-card p{font-size:.72rem;letter-spacing:.14em;margin:0;color:#cad7e5}
.reference-card:hover img{transform:scale(1.025)}

/* Direct contact and website QR */
.contact-links>a{display:block;width:max-content;max-width:100%}
.contact-links .whatsapp{color:#8ee5b2}
.contact-side{display:grid;grid-template-columns:1fr 145px;gap:2rem;align-items:start;padding-top:42px}
.qr-card{background:#fff;padding:10px;color:var(--ink);text-align:center}
.qr-card img{width:100%;display:block}
.qr-card span{font-size:.62rem;letter-spacing:.08em;text-transform:uppercase}

@media(max-width:800px){
  .intro,.solutions,.products,.approach,.projects,.cert,.contact{padding:80px 6vw}
  .products-head,.projects-head,.references-head{display:block}
  .product-grid,.luban-projects,.reference-grid{grid-template-columns:1fr}
  .product-card{min-height:0}
  .project-card img{height:270px}
  .contact-main{grid-template-columns:1fr;gap:2.5rem;padding-bottom:45px}
  .contact-links{padding-bottom:0}
  .contact-side{grid-template-columns:1fr;padding-top:30px}
  .contact-details{grid-template-columns:1fr;gap:0;margin-top:0}
  .contact-details>div{display:grid;grid-template-columns:92px 1fr;gap:1rem;padding:14px 0;border-left:0;border-bottom:1px solid #ffffff18}
  .contact-details small{margin:0}
  .contact-details strong span{display:inline;margin:0 0 0 .35rem}
  .qr-card{width:150px}
}