:root{
  --primary:#0b3d91; --primary-dark:#082d6b; --accent:#e8590c;
  --text:#1f2937; --muted:#6b7280; --bg:#ffffff; --bg-soft:#f4f7fb;
  --border:#e5e9f0; --radius:10px;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Segoe UI',Roboto,Helvetica,Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.65}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--border);box-shadow:0 2px 8px rgba(11,61,145,.05)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--primary);letter-spacing:.5px}
.logo:hover{text-decoration:none}
.main-nav{display:flex;gap:26px}
.main-nav a{color:var(--text);font-weight:500}
.main-nav a:hover{color:var(--primary);text-decoration:none}
.header-right{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;background:none;border:none;font-size:24px;cursor:pointer;color:var(--primary)}

/* Language switcher */
.lang-switcher{position:relative}
.lang-btn{display:flex;align-items:center;gap:6px;background:var(--bg-soft);border:1px solid var(--border);border-radius:20px;padding:6px 14px;font-size:13px;cursor:pointer;color:var(--text)}
.lang-menu{display:none;position:absolute;right:0;top:110%;background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 8px 24px rgba(0,0,0,.12);list-style:none;min-width:170px;overflow:hidden}
.lang-menu.open{display:block}
.lang-menu a{display:block;padding:10px 16px;font-size:14px;color:var(--text)}
.lang-menu a:hover,.lang-menu a.active{background:var(--bg-soft);color:var(--primary);text-decoration:none}

/* Hero */
.hero{background:linear-gradient(120deg,var(--primary-dark),var(--primary) 60%,#1e5cc7);color:#fff;padding:84px 0}
.hero h1{font-size:40px;line-height:1.25;max-width:760px;margin-bottom:18px}
.hero p{font-size:17px;max-width:720px;opacity:.92;margin-bottom:30px}
.btn{display:inline-block;padding:12px 26px;border-radius:6px;font-weight:600;border:none;cursor:pointer;font-size:15px}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#d24e07;text-decoration:none}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.7);margin-left:12px}
.btn-outline:hover{background:rgba(255,255,255,.12);text-decoration:none}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:-40px;position:relative;z-index:2}
.stat-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px 18px;text-align:center;box-shadow:0 6px 18px rgba(11,61,145,.07)}
.stat-card b{display:block;font-size:30px;color:var(--primary)}
.stat-card span{color:var(--muted);font-size:13px}

/* Sections */
.section{padding:64px 0}
.section.soft{background:var(--bg-soft)}
.section-title{font-size:28px;margin-bottom:8px}
.section-sub{color:var(--muted);margin-bottom:34px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:30px}

/* Product grid */
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.product-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:box-shadow .2s,transform .2s;display:flex;flex-direction:column}
.product-card:hover{box-shadow:0 10px 28px rgba(11,61,145,.12);transform:translateY(-3px)}
.product-card .thumb{aspect-ratio:4/3;background:linear-gradient(135deg,#dbe7fb,#f4f7fb);display:flex;align-items:center;justify-content:center}
.product-card .thumb img{width:100%;height:100%;object-fit:cover}
.product-card .body{padding:18px;flex:1;display:flex;flex-direction:column}
.product-card .cat{font-size:12px;color:var(--accent);font-weight:600;text-transform:uppercase;letter-spacing:.5px}
.product-card h3{font-size:17px;margin:6px 0 8px}
.product-card p{font-size:13.5px;color:var(--muted);flex:1}
.product-card .more{margin-top:12px;font-weight:600;font-size:14px}

/* Category filter */
.cat-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.cat-bar a{padding:7px 16px;border:1px solid var(--border);border-radius:20px;font-size:14px;color:var(--text);background:#fff}
.cat-bar a.active,.cat-bar a:hover{background:var(--primary);color:#fff;text-decoration:none;border-color:var(--primary)}

/* Why cards */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.why-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px 22px}
.why-card .num{font-size:26px;font-weight:800;color:var(--accent)}
.why-card h3{font-size:17px;margin:10px 0 8px}
.why-card p{font-size:13.5px;color:var(--muted)}

/* News */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px;display:flex;flex-direction:column}
.news-card time{font-size:12px;color:var(--muted)}
.news-card h3{font-size:16.5px;margin:8px 0}
.news-card p{font-size:13.5px;color:var(--muted);flex:1}
.news-list .news-item{padding:22px 0;border-bottom:1px solid var(--border)}
.news-list .news-item h2{font-size:20px}
.news-list .news-item time{font-size:12.5px;color:var(--muted)}

/* Article */
.article{max-width:820px;margin:0 auto}
.article h1{font-size:30px;margin-bottom:10px}
.article .meta{color:var(--muted);font-size:13px;margin-bottom:26px}
.article .content{font-size:16px}
.article .content img{margin:18px 0}
.article .content h2,.article .content h3{margin:22px 0 10px}

/* Detail */
.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.detail-img{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--bg-soft)}
.spec-table{width:100%;border-collapse:collapse;margin-top:16px;font-size:14px}
.spec-table th,.spec-table td{border:1px solid var(--border);padding:9px 12px;text-align:left}
.spec-table th{background:var(--bg-soft);width:38%}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:44px}
.contact-box{background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius);padding:28px}
.contact-box ul{list-style:none}
.contact-box li{padding:10px 0;border-bottom:1px dashed var(--border);font-size:14.5px}
.contact-box li:last-child{border-bottom:none}
.contact-box li b{display:block;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:14px;font-weight:600;margin-bottom:6px}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:11px 13px;border:1px solid var(--border);border-radius:6px;font-size:14.5px;font-family:inherit}
.form-group textarea{min-height:140px;resize:vertical}
.alert{padding:13px 16px;border-radius:6px;margin-bottom:18px;font-size:14.5px}
.alert-ok{background:#e7f6ec;border:1px solid #b7e3c6;color:#1e7a3c}
.alert-err{background:#fdecec;border:1px solid #f5c2c2;color:#a02222}

/* Footer */
.site-footer{background:#0e2242;color:#c9d6ee;margin-top:70px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1.3fr;gap:40px;padding:52px 0 34px}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:14px}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:8px;font-size:14px}
.site-footer a{color:#c9d6ee}
.site-footer p{font-size:14px;opacity:.85}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:16px 0;font-size:13px;opacity:.7}

.whatsapp-float{position:fixed;right:22px;bottom:22px;width:54px;height:54px;border-radius:50%;background:#25d366;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 18px rgba(0,0,0,.25);z-index:60}
.whatsapp-float:hover{transform:scale(1.06)}

.page-banner{background:linear-gradient(120deg,var(--primary-dark),var(--primary));color:#fff;padding:46px 0}
.page-banner h1{font-size:30px}
.breadcrumb{font-size:13px;opacity:.85;margin-top:6px}

@media(max-width:900px){
  .product-grid,.news-grid{grid-template-columns:repeat(2,1fr)}
  .why-grid,.stats{grid-template-columns:repeat(2,1fr)}
  .detail-grid,.contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero h1{font-size:28px}
  .main-nav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;padding:16px 20px;gap:14px;border-bottom:1px solid var(--border)}
  .main-nav.open{display:flex}
  .nav-toggle{display:block}
}
@media(max-width:560px){
  .product-grid,.news-grid{grid-template-columns:1fr}
}