:root{--red:#C8102E;--red2:#9E0C24;--ink:#1A1A1A;--grey:#6B7280;--line:#E6E6E9;--panel:#F5F5F6;--dark:#161618}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:1140px;margin:0 auto;padding:0 24px}
.kicker{color:var(--red);font-weight:700;font-size:13px;letter-spacing:.16em;text-transform:uppercase;margin-bottom:10px}
h1{font-size:clamp(30px,4.6vw,50px);font-weight:800;letter-spacing:-.02em;line-height:1.08}
h2.sec{font-size:clamp(24px,3.2vw,34px);font-weight:800;letter-spacing:-.01em;line-height:1.15}
h3{font-size:18px}
.rule{width:52px;height:4px;background:var(--red);border-radius:2px;margin:14px 0 24px}
section{padding:72px 0}
p.lead{color:var(--grey);font-size:17px;max-width:760px}
.btn{display:inline-block;background:var(--red);color:#fff;font-weight:700;padding:12px 22px;border-radius:8px;font-size:15px;border:0;cursor:pointer;transition:.15s}
.btn:hover{background:var(--red2)}
.btn.ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.7)}
.btn.ghost:hover{background:rgba(255,255,255,.12)}
/* nav */
header.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.93);backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;gap:18px;height:64px}
.logo{font-weight:800;font-size:21px;color:var(--red)}
.logo small{display:block;font-size:9px;letter-spacing:.12em;color:var(--grey);font-weight:600}
nav.links{margin-left:auto;display:flex;gap:22px}
nav.links a{font-size:14.5px;font-weight:600;color:#333}
nav.links a:hover{color:var(--red)}
.toggle{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;font-size:13px;font-weight:700}
.toggle button{border:0;background:#fff;padding:7px 11px;cursor:pointer;color:var(--grey)}
.toggle button.on{background:var(--red);color:#fff}
.nav-cta{display:inline-block}
/* breadcrumb */
.crumb{font-size:13px;color:var(--grey);padding-top:22px}
.crumb a:hover{color:var(--red)}
/* hero (subpage) */
.subhero{background:var(--dark);color:#fff;position:relative;overflow:hidden}
.subhero .wrap{position:relative;z-index:2;padding:64px 24px}
.subhero h1{max-width:18ch}
.subhero p{margin-top:18px;color:#dadade;font-size:18px;max-width:60ch}
.subhero .cta{margin-top:28px;display:flex;gap:12px;flex-wrap:wrap}
.subhero img.side{border-radius:12px;margin-top:26px;max-width:520px;width:100%}
/* home hero */
.hero{position:relative;color:#fff;min-height:86vh;display:flex;align-items:center;background:#111}
.hero img.bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.5}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,10,10,.82),rgba(10,10,10,.35))}
.hero .wrap{position:relative;z-index:2}
.hero h1{font-size:clamp(32px,5.2vw,58px);max-width:15ch;color:#fff}
.hero p.sub{margin-top:18px;font-size:clamp(16px,2vw,21px);color:#e7e7ea;max-width:60ch}
.hero .cta{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}
/* statbar */
.statbar{background:var(--ink);color:#fff}
.statbar .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:28px 24px}
.stat b{display:block;font-size:28px;font-weight:800;color:#fff}
.stat span{color:#b9b9c0;font-size:13px}
/* layout helpers */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center}
.split img{border-radius:12px;width:100%}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:28px}
.grid.cols3{grid-template-columns:repeat(3,1fr)}
.grid.cols2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--panel);border-radius:12px;padding:22px;display:block;color:inherit}
a.card:hover{box-shadow:0 6px 24px rgba(0,0,0,.08);transform:translateY(-2px);transition:.15s}
.card .ic{width:38px;height:38px;margin-bottom:12px}
.card h3{margin-bottom:6px}
.card p{color:var(--grey);font-size:13.5px}
.card .more{color:var(--red);font-weight:700;font-size:13px;margin-top:10px;display:inline-block}
.note{margin-top:20px;color:var(--red);font-weight:700}
ul.checks{list-style:none;margin-top:18px;display:grid;gap:12px}
ul.checks li{position:relative;padding-left:28px;color:#333}
ul.checks li::before{content:"";position:absolute;left:0;top:8px;width:12px;height:12px;border-radius:50%;background:var(--red)}
ul.checks li b{color:var(--ink)}
#partners ul.checks li{color:#e8e8ec}
#partners ul.checks li b{color:#fff}
.prose p{margin:14px 0;color:#333}
.prose h2{margin-top:8px}
/* spec table */
table.spec{width:100%;border-collapse:separate;border-spacing:0 8px;margin-top:22px}
table.spec td{background:var(--panel);padding:13px 18px;font-size:15px}
table.spec td:first-child{border-radius:8px 0 0 8px;font-weight:600;width:42%}
table.spec td:last-child{border-radius:0 8px 8px 0;color:#444}
table.spec tr.hd td{background:var(--ink);color:#fff;font-weight:700}
/* FAQ */
.faq{margin-top:22px}
.faq details{background:var(--panel);border-radius:10px;padding:0 20px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:700;padding:16px 0;list-style:none;font-size:15.5px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--red);font-weight:800}
.faq details[open] summary::after{content:"\2013"}
.faq details p{color:var(--grey);padding:0 0 16px;font-size:14.5px}
/* related */
.related .grid{margin-top:0}
/* contact band */
.ctaband{background:var(--dark);color:#fff}
.ctaband .wrap{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.ctaband h2{color:#fff;max-width:22ch}
.ctaband p{color:#cfcfd6;margin-top:8px}
/* contact section (home) */
.contact{background:var(--panel)}
.c-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:46px;margin-top:28px}
form.quote{display:grid;gap:13px}
form.quote input,form.quote textarea{width:100%;padding:13px 15px;border:1px solid var(--line);border-radius:9px;font:inherit;font-size:15px;background:#fff}
form.quote textarea{min-height:120px;resize:vertical}
form.quote .row{display:grid;grid-template-columns:1fr 1fr;gap:13px}
.c-info{background:#fff;border-radius:14px;padding:26px;display:flex;flex-direction:column;gap:13px;align-items:flex-start}
.c-info .qr{width:150px;height:150px;border-radius:10px;border:1px solid var(--line)}
.c-row{display:flex;gap:10px;align-items:center;font-size:15px;font-weight:600}
.c-row svg{width:20px;height:20px;flex:0 0 20px;fill:var(--red)}
.wa{display:inline-flex;gap:9px;align-items:center;background:#25D366;color:#fff;font-weight:700;padding:11px 18px;border-radius:8px}
.muted{color:var(--grey);font-size:13px}
/* footer */
footer{background:var(--ink);color:#b8b8bf;padding:54px 0 30px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
footer .logo{color:#fff;margin-bottom:10px}
footer h4{color:#fff;font-size:13px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:12px}
footer ul{list-style:none;display:grid;gap:8px}
footer ul a{font-size:14px;color:#b8b8bf}
footer ul a:hover{color:#fff}
footer .tag{font-size:13.5px;max-width:34ch;color:#9a9aa2}
.foot-bottom{border-top:1px solid #2a2a2e;margin-top:34px;padding-top:18px;font-size:12.5px;color:#7c7c84;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}
@media(max-width:900px){
 nav.links{display:none}
 .split{grid-template-columns:1fr;gap:28px}
 .grid,.grid.cols3{grid-template-columns:1fr 1fr}
 .statbar .wrap{grid-template-columns:1fr 1fr}
 .c-grid{grid-template-columns:1fr}
 .foot-grid{grid-template-columns:1fr 1fr}
 section{padding:54px 0}
}
@media(max-width:560px){
 .grid,.grid.cols3,.grid.cols2{grid-template-columns:1fr}
 form.quote .row{grid-template-columns:1fr}
 .foot-grid{grid-template-columns:1fr}
 .nav-cta{display:none}
}