*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#0b5ed7;--primary-d:#084298;--accent:#00b4d8;--dark:#0a1628;--gray:#64748b;--light:#f5f8fc}
html{scroll-behavior:smooth}
body{font-family:'Segoe UI',system-ui,-apple-system,'Helvetica Neue',Arial,sans-serif;color:#1e293b;line-height:1.7;background:#fff}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
/* header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);box-shadow:0 2px 12px rgba(10,22,40,.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:76px}
.logo img{height:56px;width:auto}
.nav{display:flex;gap:8px;align-items:center}
.nav a{padding:10px 16px;border-radius:8px;font-weight:600;font-size:15px;color:#1e293b;transition:.25s}
.nav a:hover,.nav a.active{color:var(--primary);background:#eef4ff}
.nav .cta{background:var(--primary);color:#fff}
.nav .cta:hover{background:var(--primary-d);color:#fff}
.menu-toggle{display:none;font-size:26px;background:none;border:none;cursor:pointer;color:var(--dark)}
/* hero */
.hero{position:relative;min-height:640px;display:flex;align-items:center;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;animation:zoom 18s ease-in-out infinite alternate}
@keyframes zoom{from{transform:scale(1)}to{transform:scale(1.08)}}
.hero::after{content:'';position:absolute;inset:0;background:linear-gradient(100deg,rgba(6,20,45,.88) 20%,rgba(6,20,45,.45) 70%)}
.hero-content{position:relative;z-index:2;max-width:720px;padding:80px 0}
.hero h1{font-size:clamp(30px,4.5vw,52px);line-height:1.25;margin-bottom:20px;font-weight:800}
.hero p{font-size:clamp(16px,2vw,20px);color:#cbd5e1;margin-bottom:32px}
.btn{display:inline-block;padding:14px 32px;border-radius:10px;font-weight:700;font-size:16px;transition:.25s;cursor:pointer;border:none}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-d);transform:translateY(-2px)}
.btn-outline{border:2px solid rgba(255,255,255,.7);color:#fff;margin-left:12px}
.btn-outline:hover{background:#fff;color:var(--dark)}
/* sections */
.section{padding:80px 0}
.section.alt{background:var(--light)}
.section-title{text-align:center;max-width:760px;margin:0 auto 52px}
.section-title .kicker{color:var(--accent);font-weight:700;text-transform:uppercase;letter-spacing:2px;font-size:13px}
.section-title h2{font-size:clamp(26px,3.4vw,38px);color:var(--dark);margin:10px 0 14px}
.section-title p{color:var(--gray)}
.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:16px;overflow:hidden;box-shadow:0 4px 20px rgba(10,22,40,.08);transition:.3s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-6px);box-shadow:0 14px 34px rgba(11,94,215,.18)}
.card img{height:230px;width:100%;object-fit:cover}
.card-body{padding:22px;flex:1;display:flex;flex-direction:column}
.card-body h3{font-size:18px;color:var(--dark);margin-bottom:10px}
.card-body p{color:var(--gray);font-size:14.5px;flex:1}
.card-body .more{margin-top:14px;color:var(--primary);font-weight:700;font-size:14px}
.feature-icon{width:60px;height:60px;border-radius:14px;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;font-size:28px;margin-bottom:18px;color:#fff}
.stats{background:linear-gradient(120deg,var(--dark),#123a6b);color:#fff;padding:64px 0}
.stats .grid-4{text-align:center}
.stats .num{font-size:40px;font-weight:800;color:var(--accent)}
.stats .lbl{color:#94a3b8;font-size:14px;margin-top:6px}
.page-hero{background:linear-gradient(120deg,var(--dark),#14417c);color:#fff;padding:90px 0;text-align:center}
.page-hero h1{font-size:clamp(28px,4vw,44px)}
.page-hero p{color:#94a3b8;margin-top:10px}
/* timeline */
.timeline{position:relative;max-width:800px;margin:0 auto;padding-left:32px}
.timeline::before{content:'';position:absolute;left:8px;top:6px;bottom:6px;width:3px;background:linear-gradient(var(--primary),var(--accent));border-radius:3px}
.tl-item{position:relative;margin-bottom:28px;padding-left:24px}
.tl-item::before{content:'';position:absolute;left:-31px;top:8px;width:15px;height:15px;border-radius:50%;background:var(--primary);border:3px solid #dbeafe}
.tl-item .t{font-weight:800;color:var(--primary);font-size:17px}
/* faq */
.faq-item{background:#fff;border-radius:12px;margin-bottom:16px;box-shadow:0 2px 12px rgba(10,22,40,.07);overflow:hidden}
.faq-item summary{padding:20px 24px;font-weight:700;cursor:pointer;list-style:none;font-size:16.5px;color:var(--dark);position:relative;padding-right:48px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'+';position:absolute;right:22px;font-size:24px;color:var(--primary)}
.faq-item[open] summary::after{content:'−'}
.faq-item .a{padding:0 24px 20px;color:var(--gray)}
/* product detail */
.pd-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.pd-grid img{border-radius:16px;box-shadow:0 8px 30px rgba(10,22,40,.12);width:100%}
.checklist{list-style:none;margin:18px 0}
.checklist li{padding:8px 0 8px 34px;position:relative;color:#334155}
.checklist li::before{content:'✔';position:absolute;left:0;color:var(--primary);font-weight:700}
.tag{display:inline-block;background:#eef4ff;color:var(--primary);border-radius:20px;padding:5px 14px;font-size:13px;font-weight:600;margin:4px 6px 4px 0}
/* cta */
.cta-band{background:linear-gradient(120deg,var(--primary),var(--accent));color:#fff;padding:70px 0;text-align:center}
.cta-band h2{font-size:clamp(24px,3vw,34px);margin-bottom:12px}
.cta-band .btn{background:#fff;color:var(--primary);margin-top:18px}
/* form */
.form-card{background:#fff;border-radius:18px;box-shadow:0 8px 30px rgba(10,22,40,.1);padding:36px;max-width:640px;margin:0 auto}
.form-group{margin-bottom:18px}
.form-group label{display:block;font-weight:600;margin-bottom:6px;font-size:14.5px;color:var(--dark)}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:12px 14px;border:1.5px solid #dbe2ec;border-radius:10px;font-size:15px;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(11,94,215,.12)}
.form-success{display:none;background:#e8f9ef;border:1.5px solid #34c07c;color:#177a4b;border-radius:12px;padding:18px 20px;margin-top:18px;font-weight:600}
.form-error{display:none;background:#fdeeee;border:1.5px solid #e57373;color:#b23b3b;border-radius:12px;padding:18px 20px;margin-top:18px}
/* footer */
.site-footer{background:var(--dark);color:#94a3b8;padding:64px 0 0;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:40px;padding-bottom:44px}
.site-footer h4{color:#fff;margin-bottom:16px;font-size:16px}
.site-footer a:hover{color:#fff}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:9px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;text-align:center;font-size:13.5px}
/* responsive */
@media(max-width:960px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}.pd-grid{grid-template-columns:1fr}}
@media(max-width:720px){
.menu-toggle{display:block}
.nav{position:fixed;top:76px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 20px 20px;box-shadow:0 12px 24px rgba(10,22,40,.15);display:none}
.nav.open{display:flex}
.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
.hero{min-height:520px}
.btn-outline{margin-left:0;margin-top:12px}
}