:root{
  --primary:#1e4b8c;
  --primary-dark:#163a6e;
  --primary-light:#e8eef7;
  --dark:#0f2b5b;
  --white:#fff;
  --gray:#f4f6f9;
  --muted:#6b7a90;
  --text:#1a2537;
  --line:#e5eaf1;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--text);font-family:Inter,Roboto,Arial,"Microsoft YaHei",sans-serif;background:#fff;line-height:1.75}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto}
.container-xl{max-width:1240px;margin:auto;padding:0 24px}

/* ===== Top bar — hidden, header goes to top ===== */
.topbar{display:none}

/* ===== Header — transparent over hero, white bg on scroll ===== */
.site-header{position:absolute;top:0;left:0;right:0;z-index:1000;background:transparent;transition:background .4s cubic-bezier(.4,0,.2,1),box-shadow .4s ease}
.site-header.scrolled{position:fixed;top:0;background:rgba(255,255,255,.97);backdrop-filter:blur(14px);box-shadow:0 2px 24px rgba(15,43,91,.08)}
.header-inner{height:80px;display:flex;align-items:center;gap:28px}
.brand img{height:40px;width:auto;display:block;filter:brightness(0) invert(1);transition:filter .4s ease}
.site-header.scrolled .brand img{filter:none}
.nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;gap:6px;padding:28px 14px;font-size:15px;font-weight:500;color:rgba(255,255,255,.9);white-space:nowrap;transition:color .3s ease;position:relative}
.nav-link:after{content:"";position:absolute;left:14px;right:14px;bottom:20px;height:2px;background:#7eb3e8;border-radius:2px;transform:scaleX(0);transform-origin:left;transition:transform .35s cubic-bezier(.4,0,.2,1)}
.nav-link:hover:after,.nav-item.active>.nav-link:after{transform:scaleX(1)}
.site-header.scrolled .nav-link{color:var(--text)}
.site-header.scrolled .nav-link:after{background:var(--primary)}
.nav-link:hover,.nav-item.active>.nav-link{color:#7eb3e8}
.site-header.scrolled .nav-link:hover{color:var(--primary)}
.dropdown{position:absolute;top:78px;left:0;min-width:220px;background:#fff;border:1px solid var(--line);box-shadow:0 20px 50px rgba(15,43,91,.14);padding:10px;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .25s ease,transform .25s ease,visibility .25s;border-radius:12px}
.nav-item:hover .dropdown{opacity:1;visibility:visible;transform:none;transition-delay:.1s}
.dropdown a{display:block;padding:11px 14px;border-radius:8px;color:#475569;font-size:14px;transition:.15s}
.dropdown a:hover{background:var(--primary-light);color:var(--primary);padding-left:18px}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:10px}
.header-cta{display:inline-flex;align-items:center;gap:8px;background:var(--primary);color:#fff;padding:11px 20px;border-radius:999px;font-size:14px;font-weight:600;white-space:nowrap;transition:.25s;box-shadow:0 8px 24px rgba(30,75,140,.25)}
.header-cta:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 12px 28px rgba(30,75,140,.35)}
.menu-btn{display:none;border:0;background:none;font-size:26px;color:#fff;cursor:pointer}
.site-header.scrolled .menu-btn{color:var(--text)}

/* Language switcher inside header */
.header-actions .lang-switch{display:inline-flex;align-items:center;gap:0;background:rgba(0,0,0,.2);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.2);border-radius:999px;padding:3px;font-size:12px;font-weight:600;transition:.3s}
.site-header.scrolled .header-actions .lang-switch{background:#f0f2f5;border-color:#e5eaf1;backdrop-filter:none}
.header-actions .lang-switch .lang-current,.header-actions .lang-switch a{padding:5px 13px;border-radius:999px;line-height:1;transition:.25s}
.header-actions .lang-switch .lang-current{background:#fff;color:var(--primary);font-weight:700;box-shadow:0 2px 8px rgba(0,0,0,.15)}
.header-actions .lang-switch a{color:rgba(255,255,255,.75)}
.header-actions .lang-switch a:hover{color:#fff}
.site-header.scrolled .header-actions .lang-switch a{color:#8a96a8}
.site-header.scrolled .header-actions .lang-switch a:hover{color:var(--primary)}

/* ===== Hero ===== */
.hero{position:relative;overflow:hidden;background:var(--dark);min-height:100vh;display:flex;align-items:center}
.hero-bg{position:absolute;inset:0;background:linear-gradient(100deg,rgba(15,43,91,.88) 0%,rgba(15,43,91,.55) 45%,rgba(15,43,91,.15) 100%);z-index:1}
.hero-art{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.hero-content{position:relative;z-index:2;max-width:1240px;width:100%;margin:auto;padding:140px 24px 120px;color:#fff}
.eyebrow{display:inline-flex;align-items:center;gap:10px;color:#7eb3e8;font-weight:700;letter-spacing:3px;font-size:13px;text-transform:uppercase}
.eyebrow:before{content:"";width:32px;height:2px;background:#7eb3e8}
.hero h1{font-size:clamp(36px,5vw,64px);line-height:1.15;max-width:760px;margin:20px 0 24px;font-weight:800;letter-spacing:-1px}
.hero p{font-size:18px;line-height:1.8;color:rgba(255,255,255,.85);max-width:620px;margin:0 0 36px}
.actions{display:flex;flex-wrap:wrap;gap:14px}

/* ===== Buttons — pill ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border-radius:999px;padding:14px 28px;font-weight:600;border:1px solid transparent;transition:.25s;font-size:15px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 30px rgba(30,75,140,.3)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px)}
.btn-primary .btn-arrow{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:#fff;color:var(--primary);font-size:16px}
.btn-dark-outline{border-color:rgba(255,255,255,.4);color:#fff;background:transparent}
.btn-dark-outline:hover{background:rgba(255,255,255,.1)}
.btn-outline{border-color:#c8d3e0;color:var(--primary);background:#fff}
.btn-outline:hover{border-color:var(--primary);background:var(--primary-light)}

/* ===== Sections ===== */
.section{padding:100px 0}
.section-sm{padding:60px 0}
.section-head{margin-bottom:50px}
.section-kicker{font-size:13px;letter-spacing:3px;font-weight:700;color:var(--primary);text-transform:uppercase}
.section-title{font-size:clamp(30px,3.5vw,46px);line-height:1.2;margin:10px 0 16px;color:var(--text);font-weight:800;letter-spacing:-.5px}
.section-desc{max-width:680px;color:var(--muted);font-size:16px}

/* ===== Grids & Cards ===== */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:.3s;box-shadow:0 4px 20px rgba(15,43,91,.05)}
.card:hover{transform:translateY(-6px);box-shadow:0 24px 50px rgba(15,43,91,.12);border-color:#d0dcec}
.card-media{aspect-ratio:1.3;overflow:hidden;background:var(--gray)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:.5s}
.card:hover .card-media img{transform:scale(1.05)}
.card-body{padding:26px}
.card h3{margin:0 0 10px;font-size:20px;line-height:1.4;color:var(--text)}
.card p{color:var(--muted);font-size:14px;margin:0 0 16px}
.arrow{color:var(--primary);font-weight:700;font-size:14px}

/* ===== Stats ===== */
.stat-strip{background:#fff;padding:80px 0;border-top:1px solid var(--line)}
.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:30px}
.stat{padding:10px 0;border-top:2px solid var(--line)}
.stat strong{display:flex;align-items:baseline;gap:6px;font-size:48px;line-height:1.1;color:var(--text);font-weight:800}
.stat strong span{font-size:16px;color:var(--muted);font-weight:500}
.stat span{display:block;color:var(--muted);font-size:14px;margin-top:8px}

/* ===== Dark section ===== */
.dark-section{background:var(--dark);color:#fff}
.dark-section .section-title{color:#fff}
.dark-section .section-desc{color:#a8b8d0}

/* ===== Why choose us ===== */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature{padding:36px 30px;border-radius:18px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;transition:.3s}
.feature:hover{transform:translateY(-4px);box-shadow:0 20px 40px rgba(30,75,140,.3)}
.feature-icon{width:52px;height:52px;border-radius:14px;background:rgba(255,255,255,.15);display:grid;place-items:center;font-size:22px;margin-bottom:18px}
.feature h3{margin:0 0 10px;font-size:19px}
.feature p{margin:0;color:rgba(255,255,255,.8);font-size:14px;line-height:1.7}

/* ===== Process ===== */
.process{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.process-item{text-align:center;padding:24px 12px;border:1px solid var(--line);border-radius:14px;background:#fff;transition:.25s}
.process-item:hover{border-color:var(--primary);box-shadow:0 8px 24px rgba(30,75,140,.1)}
.process-num{width:44px;height:44px;border-radius:50%;margin:0 auto 12px;background:var(--primary-light);color:var(--primary);display:grid;place-items:center;font-weight:800}
.process-item strong{font-size:14px;color:var(--text)}

/* ===== CTA ===== */
.cta{background:linear-gradient(120deg,var(--dark),var(--primary));color:#fff;border-radius:24px;padding:60px;display:flex;align-items:center;justify-content:space-between;gap:30px}
.cta h2{font-size:32px;line-height:1.3;margin:0 0 10px}
.cta p{color:rgba(255,255,255,.8);margin:0}

/* ===== Inner page hero ===== */
.inner-hero{min-height:480px;display:flex;align-items:center;background:var(--dark);position:relative;overflow:hidden}
.inner-hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.5}
.inner-hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(15,43,91,.9),rgba(15,43,91,.4))}
.inner-content{position:relative;z-index:2;color:#fff;padding:110px 0 70px}
.inner-content h1{font-size:clamp(32px,4vw,50px);margin:0 0 12px;font-weight:800}
.inner-content p{color:rgba(255,255,255,.75);margin:0}
.breadcrumb{padding:20px 0;color:var(--muted);font-size:13px}
.breadcrumb a:hover{color:var(--primary)}

/* ===== Sidebar ===== */
.layout{display:grid;grid-template-columns:250px 1fr;gap:40px}
.side{border:1px solid var(--line);border-radius:16px;padding:14px;height:max-content;position:sticky;top:100px}
.side-title{font-weight:800;padding:14px;border-bottom:1px solid var(--line);color:var(--text)}
.side a{display:block;padding:11px 14px;border-radius:10px;color:#475569;font-size:14px;transition:.15s}
.side a:hover,.side a.active{background:var(--primary-light);color:var(--primary);font-weight:600}

/* ===== Products ===== */
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.product-meta{display:flex;gap:8px;flex-wrap:wrap;color:var(--muted);font-size:12px}
.tag{padding:4px 10px;background:var(--primary-light);color:var(--primary);border-radius:99px}
.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:50px}
.gallery-main{border:1px solid var(--line);border-radius:20px;background:var(--gray);overflow:hidden}
.gallery-main img{width:100%;display:block}
.detail-title{font-size:36px;line-height:1.2;margin:0 0 16px}
.lead{font-size:17px;color:#475569}
.specs{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line);margin:28px 0}
.spec{padding:14px 0;border-bottom:1px solid var(--line)}
.spec b{display:block;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.8px}

/* ===== Content ===== */
.content{color:#334155;font-size:16px}
.content h2{font-size:28px;margin:36px 0 14px;color:var(--text)}
.content h3{font-size:21px;margin:28px 0 10px}
.content p{margin:0 0 15px}
.content ul{padding-left:22px}
.content table{width:100%;border-collapse:collapse;margin:22px 0}
.content th,.content td{border:1px solid var(--line);padding:12px;text-align:left}
.content th{background:var(--gray)}

/* ===== News ===== */
.news-list{display:grid;gap:20px}
.news-item{display:grid;grid-template-columns:240px 1fr;gap:24px;padding:20px;border:1px solid var(--line);border-radius:16px;transition:.25s}
.news-item:hover{box-shadow:0 12px 30px rgba(15,43,91,.08);border-color:#d0dcec}
.news-item img{width:240px;height:150px;object-fit:cover;border-radius:12px}
.news-date{color:var(--muted);font-size:12px}
.news-item h3{margin:6px 0 8px;font-size:20px}

/* ===== Contact ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.contact-card{padding:32px;border:1px solid var(--line);border-radius:18px}
.contact-line{padding:16px 0;border-bottom:1px dashed var(--line)}
.contact-line:last-child{border-bottom:0}
.form-control{width:100%;border:1px solid #c8d3e0;border-radius:10px;padding:14px 16px;font:inherit;outline:none;transition:.2s}
.form-control:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(30,75,140,.1)}
label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:var(--text)}
.form-group{margin-bottom:18px}

/* ===== Footer ===== */
.footer{background:var(--dark);color:#a8b8d0;padding-top:70px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:50px}
.footer h4{color:#fff;margin:0 0 16px;font-size:16px}
.footer p,.footer li{font-size:13px}
.footer ul{list-style:none;padding:0;margin:0}
.footer li{margin:9px 0}
.footer a:hover{color:#fff}
.footer-brand img{height:44px;filter:brightness(0) invert(1);margin-bottom:14px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;font-size:12px}

/* ===== Floating ===== */
.floating{position:fixed;right:24px;bottom:28px;z-index:900}
.floating a{display:flex;align-items:center;gap:8px;background:var(--primary);color:#fff;padding:14px 20px;border-radius:999px;box-shadow:0 12px 30px rgba(30,75,140,.35);font-size:14px;font-weight:600}
.mobile-bottom{display:none}
.searchbox{display:flex;gap:10px;margin-bottom:30px}
.empty{padding:60px 20px;text-align:center;border:1px dashed #c8d3e0;border-radius:16px;color:var(--muted)}

/* ===== Language switcher ===== */
.lang-switch{display:inline-flex;align-items:center;gap:0;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);border-radius:999px;padding:3px;font-size:12px;font-weight:600}
.lang-switch .lang-current,.lang-switch a{padding:5px 14px;border-radius:999px;line-height:1;color:#fff;transition:.2s}
.lang-switch .lang-current{background:#fff;color:var(--primary)}
.lang-switch a{color:rgba(255,255,255,.85)}
.lang-switch a:hover{color:#fff;background:rgba(255,255,255,.15)}

/* ===== 404 ===== */
.page-404{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;overflow:hidden;background:radial-gradient(1200px 600px at 70% 20%,var(--primary) 0%,var(--dark) 60%)}
.page-404 .grid-bg{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:48px 48px;mask-image:radial-gradient(ellipse at center,#000 30%,transparent 75%)}
.page-404-inner{position:relative;z-index:2;text-align:center;max-width:640px;padding:120px 24px}
.page-404 .code{font-size:clamp(100px,18vw,180px);font-weight:900;line-height:1;background:linear-gradient(180deg,#fff 30%,rgba(255,255,255,.25));-webkit-background-clip:text;background-clip:text;color:transparent;letter-spacing:-6px;margin:0 0 10px}
.page-404 h1{color:#fff;font-size:clamp(26px,3.5vw,38px);margin:0 0 14px;font-weight:800}
.page-404 p{color:rgba(255,255,255,.7);font-size:16px;line-height:1.8;margin:0 auto 30px;max-width:460px}
.page-404 .actions{justify-content:center}

/* ===== Hero slider ===== */
.hero-slider{min-height:100vh;display:block;position:relative;overflow:hidden}
.hero-slider .hero-slide{position:absolute;inset:0;width:100%;height:100%;display:flex;align-items:center;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .8s ease,visibility .8s ease}
.hero-slider .hero-slide.is-active{opacity:1;visibility:visible;pointer-events:auto}
.hero-slider .hero-art{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center center;transform:scale(1.05);transition:transform 7s ease;z-index:0}
.hero-slider .hero-slide.is-active .hero-art{transform:scale(1)}
.hero-slider .hero-bg{position:absolute;inset:0;background:linear-gradient(100deg,rgba(15,43,91,.88) 0%,rgba(15,43,91,.6) 45%,rgba(15,43,91,.2) 100%);z-index:1}
.hero-slider .hero-content{z-index:2}
.hero-slider .hero-slide.is-active .hero-content{animation:heroIn .9s ease both}
@keyframes heroIn{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:none}}
.hero-slider .eyebrow{color:#7eb3e8}
.hero-slider h1{text-shadow:0 4px 30px rgba(0,0,0,.3)}
.hero-slider p{color:rgba(255,255,255,.85)}
.hero-slider .hero-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:5;width:52px;height:52px;border:1px solid rgba(255,255,255,.3);background:rgba(15,43,91,.3);color:#fff;border-radius:50%;font-size:30px;line-height:1;cursor:pointer;backdrop-filter:blur(8px);transition:.25s}
.hero-slider .hero-arrow:hover{background:var(--primary);border-color:var(--primary)}
.hero-slider .hero-prev{left:28px}
.hero-slider .hero-next{right:28px}
.hero-slider .hero-dots{position:absolute;left:60px;bottom:40px;z-index:6;display:flex;gap:10px}
.hero-slider .hero-dot{width:32px;height:4px;border:0;border-radius:99px;background:rgba(255,255,255,.4);padding:0;cursor:pointer;transition:.25s}
.hero-slider .hero-dot.is-active{background:#fff;width:48px}

/* ===== Responsive ===== */
@media(max-width:1100px){
  .nav{gap:0}
  .nav-link{padding:28px 9px}
  .nav-link:after{left:9px;right:9px;bottom:22px}
  .header-cta{padding:10px 16px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(3,1fr);gap:20px}
  .footer-grid{grid-template-columns:2fr 1fr 1fr}
}
@media(max-width:900px){
  .site-header{top:36px}
  .header-inner{height:68px;gap:16px}
  .brand img{height:32px}
  .menu-btn{display:block;order:3}
  .header-actions{order:2;margin-left:0}
  .header-cta{display:none}
  .nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:10px 18px;flex-direction:column;align-items:stretch;box-shadow:0 15px 30px rgba(15,43,91,.1)}
  .nav.open{display:flex}
  .nav-item{width:100%}
  .nav-link{padding:13px 5px;color:var(--text)}
  .nav-link:after{display:none}
  .dropdown{position:static;display:none;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;padding:0 0 6px 14px}
  .nav-item.open .dropdown{display:block}
  .hero{min-height:640px}
  .hero-slider{min-height:640px}
  .hero-content{padding:120px 24px 100px}
  .layout{grid-template-columns:1fr}
  .side{position:static}
  .product-detail,.contact-grid{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .process{grid-template-columns:repeat(3,1fr)}
  .stat strong{font-size:36px}
  .hero-slider .hero-dots{left:24px;bottom:24px}
  .hero-slider .hero-arrow{width:40px;height:40px;font-size:24px}
  .hero-slider .hero-prev{left:12px}
  .hero-slider .hero-next{right:12px}
}
@media(max-width:600px){
  .topbar .inner{min-height:34px}
  .topbar .tagline{display:none}
  .container-xl{padding:0 18px}
  .section{padding:64px 0}
  .section-head{display:block;margin-bottom:30px}
  .grid-3,.grid-4,.product-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat strong{font-size:32px}
  .feature-grid{grid-template-columns:1fr}
  .process{grid-template-columns:repeat(2,1fr)}
  .cta{padding:36px 24px;display:block}
  .cta .actions{margin-top:20px}
  .news-item{grid-template-columns:1fr}
  .news-item img{width:100%;height:auto}
  .detail-title{font-size:28px}
  .specs{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
  .floating{bottom:80px;right:14px}
  .mobile-bottom{display:grid;grid-template-columns:1fr 1fr;position:fixed;bottom:0;left:0;right:0;z-index:950;background:#fff;border-top:1px solid var(--line);box-shadow:0 -8px 25px rgba(15,43,91,.08)}
  .mobile-bottom a{padding:12px;text-align:center;font-size:13px;font-weight:600}
  .mobile-bottom a:first-child{color:var(--primary);border-right:1px solid var(--line)}
  .inner-hero{min-height:280px}
  .inner-content{padding-top:60px}
  .page-404{min-height:100vh}
}