:root{--primary:#0b3d66;--accent:#e8641e;--dark:#12283a;--light:#f5f8fb;--text:#33414e}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Segoe UI",Roboto,Arial,sans-serif;color:var(--text);line-height:1.7;background:#fff}
.container{max-width:1160px;margin:0 auto;padding:0 20px}
a{color:var(--primary);text-decoration:none}
img{max-width:100%;height:auto;display:block}
h1,h2,h3{color:var(--dark);line-height:1.3}
.site-header{background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.06);position:sticky;top:0;z-index:50}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;min-height:74px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--dark)}
.brand img{width:44px;height:44px;border-radius:8px;object-fit:cover}
.brand span{font-size:15px;max-width:260px}
.nav{display:flex;gap:26px}
.nav a{font-weight:600;color:var(--dark);padding:6px 0;border-bottom:3px solid transparent}
.nav a:hover{color:var(--accent);border-color:var(--accent)}
.nav-toggle{display:none;background:none;border:none;font-size:26px;cursor:pointer;color:var(--dark)}
.hero{background:linear-gradient(120deg,var(--primary) 0%,#14507f 60%,#1b6aa8 100%);color:#fff;padding:96px 0;text-align:center}
.hero h1{color:#fff;font-size:40px;margin-bottom:16px}
.hero p{max-width:720px;margin:0 auto 30px;font-size:18px;opacity:.92}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:13px 30px;border-radius:6px;font-weight:700;border:none;cursor:pointer;font-size:16px;transition:.2s}
.btn:hover{background:#c9530f}
.btn-outline{background:transparent;border:2px solid #fff;color:#fff}
.btn-outline:hover{background:#fff;color:var(--primary)}
section{padding:70px 0}
.sec-title{text-align:center;margin-bottom:44px;font-size:30px}
.sec-sub{text-align:center;max-width:760px;margin:-30px auto 44px;color:#5b6b7a}
.grid{display:grid;gap:26px}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid #e6edf3;border-radius:10px;overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-5px);box-shadow:0 12px 26px rgba(11,61,102,.13)}
.card img{width:100%;aspect-ratio:400/266;object-fit:cover}
.card-body{padding:18px 20px 22px;flex:1;display:flex;flex-direction:column;gap:8px}
.card-body h3{font-size:17px}
.card-body p{font-size:14px;color:#5b6b7a;flex:1}
.card-body .more{color:var(--accent);font-weight:700;font-size:14px}
.feature{background:var(--light)}
.feature-item{text-align:center;padding:26px 18px;background:#fff;border-radius:10px;border:1px solid #e6edf3}
.feature-item .ic{font-size:34px;color:var(--accent);margin-bottom:10px}
.about-split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.about-split img{border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,.12)}
.page-head{background:linear-gradient(120deg,var(--primary),#1b6aa8);color:#fff;text-align:center;padding:64px 0}
.page-head h1{color:#fff;font-size:34px}
.page-head p{opacity:.9;margin-top:8px}
.cta-band{background:var(--dark);color:#fff;text-align:center;padding:56px 0}
.cta-band h2{color:#fff;margin-bottom:14px}
.video-wrap video{width:100%;border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,.15)}
.faq-item{border:1px solid #e6edf3;border-radius:8px;margin-bottom:14px;overflow:hidden;background:#fff}
.faq-item summary{cursor:pointer;font-weight:700;color:var(--dark);padding:16px 20px;list-style:none;position:relative}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:20px;color:var(--accent);font-size:22px}
.faq-item[open] summary::after{content:"–"}
.faq-item p{padding:0 20px 18px}
.detail{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.detail img{border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,.12)}
.detail h1{font-size:30px;margin-bottom:16px}
.breadcrumb{font-size:13px;padding:16px 0;color:#7a8a99}
.contact-form{background:#fff;border:1px solid #e6edf3;border-radius:10px;padding:30px;max-width:640px;margin:0 auto}
.form-group{margin-bottom:18px}
.form-group label{display:block;font-weight:600;margin-bottom:6px;color:var(--dark)}
.form-group input,.form-group textarea{width:100%;padding:12px 14px;border:1px solid #cdd8e2;border-radius:6px;font-size:15px;font-family:inherit}
.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--accent)}
.form-msg{display:none;margin-top:18px;padding:14px 18px;border-radius:6px;background:#e8f7ee;color:#12703a;font-weight:600}
.form-msg.error{background:#fdeaea;color:#b02a2a}
.contact-info{max-width:640px;margin:0 auto 36px;text-align:center}
footer .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:36px;padding:54px 0 30px;color:#c3cfda}
footer h3{color:#fff;margin-bottom:12px;font-size:17px}
footer a{display:block;color:#c3cfda;margin-bottom:8px}
footer a:hover{color:var(--accent)}
.copyright{text-align:center;padding:18px 0;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:#8fa0b1}
@media(max-width:900px){
 .g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}
 .about-split,.detail{grid-template-columns:1fr}
 footer .footer-grid{grid-template-columns:1fr}
}
@media(max-width:640px){
 .g4,.g3{grid-template-columns:1fr}
 .hero h1{font-size:28px}.hero{padding:64px 0}
 .nav-toggle{display:block}
 .nav{display:none;position:absolute;top:74px;left:0;right:0;background:#fff;flex-direction:column;padding:16px 24px;box-shadow:0 10px 20px rgba(0,0,0,.1)}
 .nav.open{display:flex}
 .sec-title{font-size:24px}
}