:root{--primary:#0b3c5d;--accent:#d9822b;--dark:#1d2733;--light:#f5f7fa;--text:#333;--radius:10px}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;color:var(--text);line-height:1.7;background:#fff}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.container{max-width:1150px;margin:0 auto;padding:0 20px}
header{background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.08);position:sticky;top:0;z-index:100}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:12px}
.logo img{width:48px;height:48px;border-radius:8px}
.logo .name{font-weight:700;color:var(--primary);font-size:1.05rem;line-height:1.2}
nav ul{display:flex;list-style:none;gap:6px}
nav a{padding:10px 14px;border-radius:6px;font-weight:500;color:var(--dark);transition:.2s}
nav a:hover,nav a.active{background:var(--light);color:var(--primary)}
nav a.cta-nav{background:var(--accent);color:#fff}
nav a.cta-nav:hover{background:#c06f1c}
.menu-btn{display:none;background:none;border:none;font-size:1.6rem;cursor:pointer;color:var(--primary)}
.hero{position:relative;background:linear-gradient(rgba(11,60,93,.85),rgba(11,60,93,.85)),url('/img/w1.jpg') center/cover;color:#fff;text-align:center;padding:110px 20px}
.hero h1{font-size:2.6rem;max-width:900px;margin:0 auto 18px}
.hero p{font-size:1.15rem;max-width:760px;margin:0 auto 34px;opacity:.92}
.btn{display:inline-block;padding:14px 34px;border-radius:50px;font-weight:600;transition:.25s;cursor:pointer;border:none;font-size:1rem}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#c06f1c;transform:translateY(-2px)}
.btn-outline{border:2px solid #fff;color:#fff;margin-left:12px}
.btn-outline:hover{background:#fff;color:var(--primary)}
section{padding:70px 0}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:2rem;color:var(--primary);position:relative;display:inline-block;padding-bottom:14px}
.section-title h2::after{content:'';position:absolute;left:50%;transform:translateX(-50%);bottom:0;width:64px;height:4px;background:var(--accent);border-radius:2px}
.section-title p{color:#666;margin-top:12px;max-width:720px;margin-left:auto;margin-right:auto}
.grid{display:grid;gap:28px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:0 4px 18px rgba(0,0,0,.08);transition:.3s;display:block}
.card:hover{transform:translateY(-6px);box-shadow:0 12px 28px rgba(0,0,0,.14)}
.card img{width:100%;height:220px;object-fit:cover}
.card-body{padding:20px}
.card-body h3{color:var(--primary);font-size:1.1rem;margin-bottom:8px}
.card-body p{font-size:.92rem;color:#666}
.feature{text-align:center;padding:28px 20px;background:var(--light);border-radius:var(--radius)}
.feature .icon{font-size:2.2rem;margin-bottom:12px}
.feature h3{color:var(--primary);margin-bottom:8px;font-size:1.05rem}
.feature p{font-size:.9rem;color:#666}
.stats{background:var(--primary);color:#fff}
.stats .grid-4{gap:16px}
.stat{text-align:center;padding:12px}
.stat .num{font-size:2.2rem;font-weight:700;color:var(--accent)}
.stat .lbl{font-size:.9rem;opacity:.9}
.page-hero{background:linear-gradient(rgba(11,60,93,.88),rgba(11,60,93,.88)),url('/img/w2.jpg') center/cover;color:#fff;text-align:center;padding:70px 20px}
.page-hero h1{font-size:2.2rem}
.breadcrumb{font-size:.9rem;margin-top:10px;opacity:.85}
.breadcrumb a{color:var(--accent)}
.about-img img{border-radius:var(--radius);box-shadow:0 8px 24px rgba(0,0,0,.12);width:100%}
.about-text h2{color:var(--primary);margin-bottom:18px;font-size:1.7rem}
.about-text p{margin-bottom:14px;color:#555;text-align:justify}
.product-detail{display:grid;grid-template-columns:1fr 1.2fr;gap:44px;align-items:start}
.product-detail .img-box{border-radius:var(--radius);overflow:hidden;box-shadow:0 8px 24px rgba(0,0,0,.12)}
.product-detail h1{color:var(--primary);font-size:1.9rem;margin-bottom:16px}
.product-detail .desc p{margin-bottom:14px;color:#555;text-align:justify}
.spec{background:var(--light);border-radius:var(--radius);padding:20px;margin-top:18px}
.spec h3{color:var(--primary);margin-bottom:10px;font-size:1.05rem}
.spec ul{list-style:none}
.spec li{padding:7px 0;border-bottom:1px solid #e3e8ee;font-size:.93rem}
.spec li:last-child{border-bottom:none}
.spec li strong{color:var(--primary)}
.faq-item{background:var(--light);border-radius:var(--radius);margin-bottom:14px;overflow:hidden}
.faq-item summary{padding:18px 22px;font-weight:600;color:var(--primary);cursor:pointer;list-style:none;position:relative}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'+';position:absolute;right:20px;font-size:1.4rem;color:var(--accent)}
.faq-item[open] summary::after{content:'–'}
.faq-item .answer{padding:0 22px 18px;color:#555;font-size:.95rem}
.contact-wrap{display:grid;grid-template-columns:1fr 1.3fr;gap:44px}
.contact-info h3{color:var(--primary);margin-bottom:14px}
.contact-info p{margin-bottom:10px;color:#555}
.contact-info .info-line{display:flex;gap:10px;margin-bottom:16px;align-items:flex-start}
.contact-info .info-line .ic{font-size:1.2rem}
.form-group{margin-bottom:18px}
.form-group label{display:block;font-weight:600;margin-bottom:6px;color:var(--dark);font-size:.92rem}
.form-group input,.form-group textarea{width:100%;padding:12px 14px;border:1px solid #d5dbe2;border-radius:8px;font-size:.95rem;font-family:inherit;transition:.2s}
.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(11,60,93,.12)}
.form-status{display:none;margin-top:18px;padding:16px;background:#e6f7ec;border:1px solid #b7e4c7;color:#1b7a43;border-radius:8px;font-weight:600}
.form-status.error{background:#fdecea;border-color:#f5c6cb;color:#b02a37}
.cta-band{background:linear-gradient(135deg,var(--primary),#14507a);color:#fff;text-align:center;padding:64px 20px}
.cta-band h2{font-size:1.9rem;margin-bottom:14px}
.cta-band p{max-width:640px;margin:0 auto 28px;opacity:.9}
footer{background:var(--dark);color:#c8cfd6;padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;padding-bottom:40px}
.footer-grid h4{color:#fff;margin-bottom:16px;font-size:1rem}
.footer-grid ul{list-style:none}
.footer-grid li{margin-bottom:9px;font-size:.92rem}
.footer-grid a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);text-align:center;padding:18px 0;font-size:.85rem}
.video-box{max-width:820px;margin:0 auto;border-radius:var(--radius);overflow:hidden;box-shadow:0 8px 24px rgba(0,0,0,.15)}
.video-box video{width:100%;display:block}
@media(max-width:900px){
.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
.product-detail,.contact-wrap{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr 1fr}
.hero h1{font-size:2rem}
}
@media(max-width:640px){
.menu-btn{display:block}
nav{position:absolute;top:72px;left:0;right:0;background:#fff;box-shadow:0 8px 16px rgba(0,0,0,.1);display:none}
nav.open{display:block}
nav ul{flex-direction:column;padding:12px}
.grid-3,.grid-4,.grid-2{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr}
.hero{padding:80px 20px}
.hero .btn-outline{margin-left:0;margin-top:12px}
section{padding:50px 0}
}