:root{--bg-dark:#020617;--bg-card:#0f172a;--bg-card-hover:#1e293b;--accent-blue:#3b82f6;--accent-cyan:#06b6d4;--accent-green:#10b981;--text-primary:#f8fafc;--text-secondary:#94a3b8;--text-muted:#94a3b8;--border-color:#334155;--border-hover:#06b6d4}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Inter',sans-serif;background:var(--bg-dark);color:var(--text-primary);line-height:1.6;overflow-x:hidden;contain:style}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.gradient-text{background:linear-gradient(135deg,#3b82f6,#06b6d4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.btn-primary{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,#3b82f6,#06b6d4);color:#fff;padding:14px 28px;border-radius:8px;font-weight:600;transition:all .3s;border:none;cursor:pointer;font-size:15px}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(59,130,246,.4)}
.btn-secondary{display:inline-flex;align-items:center;gap:8px;background:rgba(6,182,212,.12);color:var(--accent-cyan);padding:14px 28px;border-radius:8px;font-weight:500;transition:all .3s;border:1px solid rgba(6,182,212,.3);cursor:pointer;font-size:15px}
.btn-secondary:hover{background:rgba(6,182,212,.22);transform:translateY(-2px)}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section-tag{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:2px;color:var(--accent-cyan);display:block;margin-bottom:12px}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:clamp(28px,4vw,36px);font-weight:700;margin-bottom:12px}
.section-title p{color:var(--text-secondary);max-width:560px;margin:0 auto;font-size:16px}
.fade-in{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease;will-change:opacity,transform}
.fade-in.visible{opacity:1;transform:translateY(0)}
@keyframes fadeFallback{to{opacity:1;transform:translateY(0)}}
.fade-in{animation:fadeFallback .5s ease 3s forwards}

/* Header */
header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(2,6,23,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(51,65,85,.4);transition:all .3s}
.header-content{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;justify-content:space-between;align-items:center;height:72px}
.logo{display:flex;align-items:center;gap:12px;text-decoration:none}
.logo-icon{width:40px;height:40px;background:linear-gradient(135deg,#3b82f6,#06b6d4);border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px;color:#fff}
.logo-text{font-size:22px;font-weight:700;color:var(--text-primary);letter-spacing:2px}
nav{display:flex;align-items:center;gap:4px}
nav a{color:var(--text-secondary);padding:8px 14px;border-radius:6px;font-size:14px;font-weight:500;transition:all .2s}
nav a:hover{color:var(--text-primary);background:rgba(59,130,246,.1)}
.btn-quote{background:linear-gradient(135deg,#3b82f6,#06b6d4)!important;color:#fff!important;padding:10px 20px!important;border-radius:6px;margin-left:8px}
.mobile-toggle{display:none;background:none;border:none;color:var(--text-primary);font-size:24px;cursor:pointer;padding:8px}

/* Hero */
.hero{padding:160px 24px 80px;min-height:85vh;text-align:center;background:linear-gradient(180deg,rgba(59,130,246,.08) 0%,transparent 60%);position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 50% 30%,rgba(59,130,246,.06) 0%,transparent 50%);pointer-events:none}
.hero h1{font-size:clamp(36px,6vw,60px);font-weight:800;margin-bottom:20px;line-height:1.15;letter-spacing:-1px}
.hero h1 span{background:linear-gradient(135deg,#3b82f6,#06b6d4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:18px;color:var(--text-secondary);max-width:640px;margin:0 auto 40px;line-height:1.7}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.hero-stats{display:flex;justify-content:center;gap:48px;margin-top:56px;flex-wrap:wrap}
.stat-item{text-align:center}
.stat-number{font-size:42px;font-weight:800;display:block;margin-bottom:4px;min-height:50px}
.stat-label{font-size:14px;color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;min-height:18px}

/* Categories */
.categories-section{padding:80px 0;background:var(--bg-dark)}
.categories-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.category-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:16px;padding:28px;transition:all .3s;position:relative;overflow:hidden;min-height:220px}
.category-card:hover{border-color:var(--accent-cyan);transform:translateY(-4px);box-shadow:0 12px 32px rgba(6,182,212,.12)}
.category-icon{width:48px;height:48px;background:linear-gradient(135deg,rgba(59,130,246,.15),rgba(6,182,212,.15));border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.category-icon svg{width:24px;height:24px;color:var(--accent-cyan)}
.category-card h3{font-size:18px;font-weight:600;margin-bottom:4px}
.category-count{font-size:13px;color:var(--accent-cyan);margin-bottom:8px;display:block}
.category-desc{font-size:14px;color:var(--text-secondary);margin-bottom:16px;line-height:1.5}
.category-link{font-size:14px;color:var(--accent-cyan);font-weight:500;display:inline-flex;align-items:center;gap:4px;transition:gap .2s}
.category-card:hover .category-link{gap:8px}

/* Featured Products */
.featured-section{padding:80px 0;background:linear-gradient(180deg,var(--bg-dark),rgba(15,23,42,.5),var(--bg-dark))}
.products-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.product-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:16px;overflow:hidden;transition:all .3s;text-decoration:none;display:block}
.product-card:hover{border-color:var(--accent-cyan);transform:translateY(-4px);box-shadow:0 12px 32px rgba(6,182,212,.12)}
.product-image{height:180px;min-height:180px;background:linear-gradient(135deg,rgba(59,130,246,.08),rgba(6,182,212,.08));display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--border-color)}
.product-image span{font-size:20px;font-weight:700;color:var(--accent-cyan);letter-spacing:1px}
.product-info{padding:20px}
.product-model{font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;margin-bottom:4px}
.product-info h3{font-size:17px;font-weight:600;margin-bottom:8px}
.product-spec{font-size:14px;color:var(--text-secondary);margin-bottom:12px}
.spec-highlight{color:var(--accent-cyan);font-weight:600}
.product-link{font-size:14px;color:var(--accent-cyan);font-weight:500;display:inline-flex;align-items:center;gap:4px}

/* Applications */
.applications-section{padding:80px 0;background:var(--bg-card)}
.applications-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.app-card{background:var(--bg-dark);border:1px solid var(--border-color);border-radius:16px;padding:32px;transition:all .3s}
.app-card:hover{border-color:var(--accent-green);box-shadow:0 8px 24px rgba(16,185,129,.1)}
.app-icon{width:48px;height:48px;background:rgba(16,185,129,.12);border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.app-icon svg{width:24px;height:24px;color:var(--accent-green)}
.app-card h3{font-size:20px;font-weight:600;margin-bottom:8px}
.app-card p{font-size:14px;color:var(--text-secondary);line-height:1.6}

/* Calculators */
.calculators-section{padding:80px 0;background:var(--bg-dark)}
.calc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.calc-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;padding:24px;transition:all .3s;text-decoration:none;display:block}
.calc-card:hover{border-color:var(--accent-cyan);transform:translateY(-2px)}
.calc-icon{width:40px;height:40px;background:rgba(6,182,212,.1);border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:12px}
.calc-icon svg{width:20px;height:20px;color:var(--accent-cyan)}
.calc-card h3{font-size:15px;font-weight:600;margin-bottom:6px;color:var(--text-primary)}
.calc-card p{font-size:13px;color:var(--text-secondary);line-height:1.5;margin-bottom:12px}
.calc-link{font-size:13px;color:var(--accent-cyan);font-weight:500}

/* Trust */
.trust-section{padding:80px 0;background:var(--bg-card);border-top:1px solid var(--border-color);border-bottom:1px solid var(--border-color)}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.trust-item{text-align:center}
.trust-icon{width:56px;height:56px;background:rgba(6,182,212,.12);border-radius:14px;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.trust-icon svg{width:28px;height:28px;color:var(--accent-cyan)}
.trust-item h3{font-size:17px;font-weight:600;margin-bottom:8px}
.trust-item p{font-size:14px;color:var(--text-secondary)}

/* AI Banner */
.ai-banner{padding:80px 24px;text-align:center;background:linear-gradient(135deg,rgba(59,130,246,.1),rgba(6,182,212,.08));position:relative;overflow:hidden}
.ai-banner::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 50% 50%,rgba(6,182,212,.05),transparent 70%);pointer-events:none}
.ai-banner h2{font-size:clamp(28px,4vw,36px);font-weight:700;margin-bottom:16px}
.ai-banner p{font-size:16px;color:var(--text-secondary);max-width:560px;margin:0 auto 32px;line-height:1.7}
.ai-note{font-size:13px;color:var(--text-muted);margin-top:16px}

/* Quote Banner */
.quote-banner{padding:80px 24px;text-align:center;background:linear-gradient(135deg,#3b82f6,#06b6d4);position:relative}
.quote-banner h2{font-size:clamp(28px,4vw,36px);font-weight:700;margin-bottom:24px;color:#fff}
.quote-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.quote-btns .btn-white{background:#fff;color:#3b82f6;padding:14px 28px;border-radius:8px;font-weight:600;transition:all .3s;border:none;cursor:pointer;font-size:15px}
.quote-btns .btn-outline{background:transparent;color:#fff;padding:14px 28px;border-radius:8px;font-weight:500;border:2px solid rgba(255,255,255,.4);transition:all .3s;cursor:pointer;font-size:15px}
.quote-btns .btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.1)}

/* Footer */
footer{background:var(--bg-card);border-top:1px solid var(--border-color);padding:60px 24px 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;max-width:1200px;margin:0 auto}
.footer-brand p{font-size:14px;color:var(--text-muted);margin-top:12px;line-height:1.6}
.footer-email{color:var(--accent-cyan);font-size:14px;margin-top:8px;display:inline-block}
.footer-col h4{font-size:15px;font-weight:600;color:var(--text-primary);margin-bottom:16px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:8px}
.footer-col a{font-size:14px;color:var(--text-muted);transition:color .2s}
.footer-col a:hover{color:var(--accent-cyan)}
.footer-bottom{border-top:1px solid var(--border-color);margin-top:40px;padding-top:24px;max-width:1200px;margin-left:auto;margin-right:auto;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.footer-copy{font-size:13px;color:var(--text-muted)}
.footer-copy a{color:var(--text-muted);transition:color .2s}
.footer-copy a:hover{color:var(--accent-cyan)}
.footer-languages{display:flex;gap:12px;flex-wrap:wrap}
.footer-languages a{font-size:13px;color:var(--text-muted);transition:color .2s}
.footer-languages a:hover{color:var(--accent-cyan)}

.lang-switcher{position:relative;display:inline-block;margin-left:8px}
.lang-switcher-btn{background:rgba(6,182,212,.1);color:#06b6d4;border:1px solid rgba(6,182,212,.3);padding:8px 14px;border-radius:6px;font-size:13px;font-weight:500;cursor:pointer;display:flex;align-items:center;gap:6px;transition:all .2s}
.lang-switcher-btn:hover{background:rgba(6,182,212,.2)}
.lang-switcher-btn svg{width:14px;height:14px}
.lang-dropdown{position:absolute;top:100%;right:0;margin-top:8px;background:#1e293b;border:1px solid #334155;border-radius:8px;padding:6px;min-width:140px;box-shadow:0 8px 24px rgba(0,0,0,.4);z-index:1001;opacity:0;visibility:hidden;transform:translateY(-8px);transition:all .2s}
.lang-switcher:hover .lang-dropdown,.lang-switcher.open .lang-dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.lang-dropdown a{display:flex;align-items:center;gap:8px;padding:8px 12px;border-radius:6px;font-size:14px;color:#94a3b8;transition:all .15s;text-decoration:none}
.lang-dropdown a:hover{background:rgba(6,182,212,.1);color:#06b6d4}
.lang-dropdown a.active{color:#06b6d4;font-weight:600}
.lang-dropdown .flag{font-size:16px}

/* Responsive */
@media(max-width:1024px){
 .categories-grid{grid-template-columns:repeat(2,1fr)}
 .products-grid{grid-template-columns:repeat(2,1fr)}
 .calc-grid{grid-template-columns:repeat(2,1fr)}
 .trust-grid{grid-template-columns:repeat(2,1fr)}
 .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
 nav{display:none;position:fixed;top:72px;left:0;right:0;background:rgba(2,6,23,.98);flex-direction:column;padding:24px;border-bottom:1px solid var(--border-color)}
 nav.open{display:flex}
 .mobile-toggle{display:block}
 .hero{padding:120px 24px 60px}
 .hero-stats{gap:24px}
 .stat-number{font-size:32px}
 .categories-grid,.products-grid,.applications-grid,.calc-grid,.trust-grid{grid-template-columns:1fr}
 .footer-grid{grid-template-columns:1fr}
 .footer-bottom{flex-direction:column;text-align:center}
}