:root{--primary:#0052CC;--primary-dark:#003D99;--primary-light:#E8F0FE;--accent:#00B8D9;--accent2:#36B37E;--dark:#172B4D;--gray:#5E6C84;--light:#F4F7FF;--white:#FFFFFF;--shadow:0 4px 24px rgba(0,82,204,.1);--shadow-lg:0 12px 48px rgba(0,82,204,.15)}
    *{margin:0;padding:0;box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{font-family:'Inter',sans-serif;color:var(--dark);line-height:1.7;overflow-x:hidden}
    h1,h2,h3{font-family:'Merriweather',serif;line-height:1.3}
    a{text-decoration:none;color:inherit}
    #navbar{position:fixed;top:0;width:100%;z-index:1000;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid #E8EFF9;transition:all .3s}
    #navbar.scrolled{box-shadow:var(--shadow)}
    .nav-inner{max-width:1280px;margin:0 auto;padding:0 32px;display:flex;align-items:center;justify-content:space-between;height:72px}
    .nav-logo{display:flex;align-items:center;gap:10px}
    .nav-logo-icon{width:40px;height:40px;background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:10px;display:flex;align-items:center;justify-content:center;color:white;font-weight:900;font-size:18px;flex-shrink:0}
    .nav-logo-text{font-size:20px;font-weight:800;color:var(--primary);letter-spacing:-.5px}
    .nav-logo-text span{color:var(--accent)}
    .nav-links{display:flex;gap:6px;list-style:none;align-items:center}
    .nav-links a{color:var(--gray);font-size:14px;font-weight:500;padding:8px 14px;border-radius:8px;transition:all .2s;display:block}
    .nav-links a:hover,.nav-links a.active{color:var(--primary);background:var(--primary-light)}
    .nav-cta{background:var(--primary)!important;color:white!important;border-radius:8px!important}
    .nav-cta:hover{background:var(--primary-dark)!important}
    .nav-toggle{display:none;background:none;border:none;font-size:24px;color:var(--primary);cursor:pointer}
    .page-hero{padding:120px 32px 60px;background:linear-gradient(160deg,#E8F0FE,#F4F7FF);border-bottom:1px solid #E8EFF9}
    .page-hero-inner{max-width:1280px;margin:0 auto}
    .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--gray);margin-bottom:16px}
    .breadcrumb a{color:var(--primary);font-weight:500}
    .breadcrumb i{font-size:10px}
    .page-hero h1{font-size:clamp(28px,4vw,48px);color:var(--dark);margin-bottom:12px}
    .page-hero p{font-size:16px;color:var(--gray);max-width:600px}
    .section{padding:80px 32px}
    .container{max-width:1280px;margin:0 auto}
    .section-label{display:inline-flex;align-items:center;gap:6px;background:var(--primary-light);color:var(--primary);font-size:11px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;padding:6px 14px;border-radius:100px;margin-bottom:14px}
    .section-title{font-size:clamp(24px,3.5vw,38px);color:var(--dark);margin-bottom:12px}
    .section-sub{font-size:16px;color:var(--gray);max-width:640px;margin-bottom:48px}
    .products-main{display:grid;grid-template-columns:260px 1fr;gap:48px;align-items:start}
    .filter-sidebar{background:white;border-radius:20px;padding:28px;box-shadow:var(--shadow);border:1px solid #E8EFF9;position:sticky;top:90px}
    .filter-sidebar h3{font-family:'Inter',sans-serif;font-size:15px;font-weight:700;margin-bottom:20px;padding-bottom:12px;border-bottom:2px solid var(--primary-light)}
    .filter-group{margin-bottom:20px}
    .filter-group h4{font-size:13px;font-weight:700;color:var(--dark);margin-bottom:10px}
    .filter-item{display:flex;align-items:center;gap:8px;padding:6px 0;cursor:pointer;font-size:13px;color:var(--gray);transition:color .2s}
    .filter-item:hover,.filter-item.active{color:var(--primary);font-weight:600}
    .filter-sidebar a.bbt-filter-cat,.filter-sidebar button.bbt-filter-cat{width:100%;text-align:left;background:none;border:none;cursor:pointer;font:inherit;padding:6px 0;display:flex;align-items:center;justify-content:space-between;gap:8px;color:var(--gray);transition:color .2s}
    .filter-sidebar a.bbt-filter-cat:hover,.filter-sidebar a.bbt-filter-cat.active,.filter-sidebar button.bbt-filter-cat:hover,.filter-sidebar button.bbt-filter-cat.active{color:var(--primary);font-weight:600}
    .filter-item span.count{margin-left:auto;font-size:11px;background:var(--light);padding:2px 8px;border-radius:100px;color:var(--gray)}
    .products-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
    .product-card{background:white;border-radius:20px;overflow:hidden;box-shadow:var(--shadow);border:1px solid #E8EFF9;transition:all .3s;display:flex;flex-direction:column}
    .product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
    .product-img{height:200px;background:linear-gradient(135deg,#E8F0FE,#D0E9FF);display:flex;align-items:center;justify-content:center;font-size:52px;color:var(--primary);position:relative;flex-shrink:0}
    .product-img::after{content:'';position:absolute;bottom:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--primary),var(--accent))}
    .product-badge{position:absolute;top:12px;left:12px;background:var(--primary);color:white;font-size:10px;font-weight:700;padding:3px 10px;border-radius:100px;text-transform:uppercase;letter-spacing:.5px}
    .product-badge.popular{background:#F59E0B}
    .product-body{padding:24px;display:flex;flex-direction:column;flex:1}
    .product-body h3{font-family:'Inter',sans-serif;font-size:16px;font-weight:700;margin-bottom:8px;color:var(--dark)}
    .product-body p{font-size:13px;color:var(--gray);margin-bottom:14px;flex:1;line-height:1.6}
    .product-applications{margin-bottom:16px}
    .product-applications span{background:var(--light);font-size:10px;color:var(--gray);padding:3px 9px;border-radius:5px;font-weight:500;margin-right:5px;margin-bottom:5px;display:inline-block}
    .product-link{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-size:13px;font-weight:700;transition:gap .2s}
    .product-link:hover{gap:10px}
    .cta-section{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:white;padding:80px 32px;text-align:center;position:relative;overflow:hidden}
    .cta-section::before{content:'';position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E")}
    .cta-inner{max-width:640px;margin:0 auto;position:relative;z-index:1}
    .cta-inner h2{font-size:clamp(24px,3.5vw,40px);margin-bottom:16px}
    .cta-inner p{font-size:16px;opacity:.8;margin-bottom:32px}
    .cta-inner .btn{display:inline-flex;align-items:center;gap:8px;background:white;color:var(--primary);padding:14px 28px;border-radius:10px;font-weight:700;font-size:15px;transition:all .2s}
    .cta-inner .btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.2)}
    footer{background:#0D1B2A;color:rgba(255,255,255,.5);padding:60px 32px 28px}
    .footer-inner{max-width:1280px;margin:0 auto}
    .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:44px}
    .footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:14px}
    .footer-logo-icon{width:34px;height:34px;background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:8px;display:flex;align-items:center;justify-content:center;color:white;font-weight:900;font-size:14px}
    .footer-logo-text{font-size:17px;font-weight:800;color:white}
    .footer-brand p{font-size:13px;line-height:1.7;max-width:260px}
    .footer-col h4{color:white;font-size:12px;font-weight:700;margin-bottom:14px;text-transform:uppercase;letter-spacing:1px}
    .footer-col ul{list-style:none;display:flex;flex-direction:column;gap:9px}
    .footer-col ul li a{color:rgba(255,255,255,.4);font-size:13px;transition:color .2s}
    .footer-col ul li a:hover{color:white}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.07);padding-top:20px;display:flex;justify-content:space-between;font-size:12px;align-items:center}
    .footer-bottom a{color:rgba(255,255,255,.3);text-decoration:none}
    .footer-bottom a:hover{color:rgba(255,255,255,.7)}
    @media(max-width:968px){
      .products-main{grid-template-columns:1fr}
      .filter-sidebar{position:static}
      .footer-grid{grid-template-columns:1fr 1fr}
      .nav-links{display:none;position:absolute;top:72px;left:0;right:0;background:white;flex-direction:column;padding:16px;box-shadow:var(--shadow);border-radius:0 0 16px 16px}
      .nav-links.active{display:flex}
      .nav-toggle{display:block}
    }