*{margin:0;padding:0;box-sizing:border-box;font-family:Arial,sans-serif;}
body{color:#333;line-height:1.6;background:#fff;}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}
a{text-decoration:none;color:inherit;}

header{background:#1a3a5b;padding:18px 0;position:sticky;top:0;z-index:100;}
.nav{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;}
.logo{display:flex;align-items:center;}
.logo a{display:inline-flex;align-items:center;line-height:0;background:#fff;border-radius:4px;padding:4px 8px;}
.logo img{height:40px;width:auto;display:block;}
.menu a{color:white;margin-left:25px;font-size:15px;display:inline-block;}
.menu a:hover{color:#4d9feb;}

.breadcrumb{padding:18px 0;font-size:14px;color:#666;}
.breadcrumb a{color:#4d9feb;}
.breadcrumb a:hover{text-decoration:underline;}

.product-hero{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;padding:40px 0 60px;}
.product-hero img{width:100%;border-radius:6px;border:1px solid #eee;}
.product-hero h1{font-size:32px;color:#1a3a5b;margin-bottom:15px;}
.product-hero .intro{font-size:16px;color:#555;margin-bottom:25px;}

.btn{display:inline-block;background:#4d9feb;color:white;padding:12px 30px;border-radius:4px;font-size:16px;transition:0.3s;border:none;cursor:pointer;}
.btn:hover{background:#3682c9;}
.btn-outline{background:transparent;border:2px solid #4d9feb;color:#4d9feb;margin-left:12px;}
.btn-outline:hover{background:#4d9feb;color:white;}

.section{padding:60px 0;}
.section-alt{background:#f8f9fa;}
.title{font-size:26px;color:#1a3a5b;margin-bottom:30px;position:relative;padding-bottom:12px;}
.title::after{content:'';width:60px;height:3px;background:#4d9feb;position:absolute;left:0;bottom:0;}

.spec-table,.purchase-table{width:100%;border-collapse:collapse;background:#fff;border:1px solid #e3e8ee;border-radius:6px;overflow:hidden;}
.spec-table th,.spec-table td,.purchase-table th,.purchase-table td{padding:14px 18px;text-align:left;border-bottom:1px solid #eef2f6;font-size:15px;}
.spec-table th,.purchase-table th{background:#f5f8fb;color:#1a3a5b;font-weight:600;width:28%;}
.spec-table tr:last-child td,.purchase-table tr:last-child td{border-bottom:none;}

.use-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;}
.use-item{background:#fff;border:1px solid #eee;border-radius:6px;padding:22px;}
.use-item h3{font-size:17px;color:#1a3a5b;margin-bottom:8px;}
.use-item p{font-size:14px;color:#666;}

.models-table{width:100%;border-collapse:collapse;margin-top:10px;}
.models-table th,.models-table td{padding:12px 16px;border:1px solid #e3e8ee;text-align:left;font-size:14px;}
.models-table th{background:#1a3a5b;color:white;}
.models-table tr:nth-child(even){background:#f9fbfd;}

.purchase-list{list-style:none;}
.purchase-list li{padding:12px 0;border-bottom:1px solid #eef2f6;font-size:15px;color:#555;}
.purchase-list li:last-child{border-bottom:none;}
.purchase-list strong{color:#1a3a5b;}

.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:25px;}
.related-card{border:1px solid #eee;border-radius:6px;overflow:hidden;transition:0.3s;background:#fff;}
.related-card:hover{transform:translateY(-4px);box-shadow:0 8px 15px rgba(0,0,0,0.08);}
.related-card img{width:100%;height:160px;object-fit:cover;}
.related-card-body{padding:18px;}
.related-card-body h3{font-size:16px;color:#1a3a5b;margin-bottom:8px;}
.related-card-body p{font-size:13px;color:#666;margin-bottom:12px;}
.related-card-body .link{color:#4d9feb;font-size:14px;font-weight:bold;}

.cta-box{background:#1a3a5b;color:white;text-align:center;padding:50px 30px;border-radius:6px;margin:20px 0;}
.cta-box h2{font-size:24px;margin-bottom:12px;}
.cta-box p{margin-bottom:25px;opacity:0.9;}

footer{background:#122642;color:#ccc;text-align:center;padding:30px 0 25px;font-size:14px;margin-top:40px;}
footer a{color:#4d9feb;}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 18px;margin-bottom:15px;font-size:13px;}
.footer-links a{color:#4d9feb;}
.footer-links a:hover{text-decoration:underline;}
.social-links{display:flex;justify-content:center;align-items:center;gap:14px;margin:0 0 18px;}
.social-links a{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,0.08);color:#fff;transition:0.25s;}
.social-links a:hover{transform:translateY(-2px);color:#fff;}
.social-links a[aria-label="Facebook"]:hover{background:#1877F2;}
.social-links a[aria-label="Instagram"]:hover{background:#E4405F;}
.social-links a[aria-label="YouTube"]:hover{background:#FF0000;}
.social-links svg{width:20px;height:20px;fill:currentColor;}

.whatsapp-float{position:fixed;right:22px;bottom:28px;z-index:999;display:inline-flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:50%;background:#25D366;color:#fff;box-shadow:0 6px 18px rgba(0,0,0,0.22);transition:transform 0.2s,box-shadow 0.2s;}
.whatsapp-float:hover{transform:translateY(-3px);box-shadow:0 8px 22px rgba(0,0,0,0.28);color:#fff;}
.whatsapp-float svg{width:30px;height:30px;fill:currentColor;}

@media (max-width:768px){
    .product-hero{grid-template-columns:1fr;}
    .menu a{margin-left:15px;}
    .btn-outline{display:inline-block;margin:12px 0 0;}
    .whatsapp-float{right:16px;bottom:20px;width:52px;height:52px;}
}