:root{
  --navy:#0d1b3e;
  --navy-2:#132550;
  --red:#d4141e;
  --red-dk:#a80f18;
  --white:#ffffff;
  --paper:#f4f5f8;
  --ink:#11172b;
  --muted:#5d6478;
  --line:#dfe2ea;
  --shadow:0 1px 2px rgba(13,27,62,.06),0 8px 24px rgba(13,27,62,.08);
  --shadow-lg:0 24px 60px rgba(13,27,62,.18);
  --r:14px;
  --max:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Helvetica Neue",Helvetica,Arial,system-ui,sans-serif;
  color:var(--ink);background:var(--white);line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
h1,h2,h3,h4{line-height:1.15;letter-spacing:-.02em;font-weight:800}
a{color:inherit;text-decoration:none}

/* ---------- Logo ---------- */
.logo{display:block}

/* ---------- Header ---------- */
header{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;gap:28px;height:86px}
.brandmark{display:flex;align-items:center;gap:12px;margin-inline-end:auto}
.brandmark img.logo{width:220px;height:auto;display:block}
.nav ul{display:flex;gap:26px;list-style:none;font-size:14.5px;font-weight:600;letter-spacing:.01em}
.nav ul a{color:var(--navy);opacity:.82;transition:opacity .18s}
.nav ul a:hover{opacity:1;color:var(--red)}
.btn{
  display:inline-flex;align-items:center;gap:8px;border:0;cursor:pointer;
  padding:13px 24px;border-radius:999px;font-weight:800;font-size:14.5px;
  letter-spacing:.02em;transition:transform .16s,box-shadow .16s,background .16s;
}
.btn-red{background:var(--red);color:#fff;box-shadow:0 6px 18px rgba(212,20,30,.28)}
.btn-red:hover{background:var(--red-dk);transform:translateY(-1px)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy-2);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--navy);border:2px solid rgba(13,27,62,.18)}
.btn-ghost:hover{border-color:var(--navy)}
.burger{display:none;background:none;border:0;cursor:pointer;padding:8px}
.burger span{display:block;width:24px;height:2.5px;background:var(--navy);border-radius:2px;margin:5px 0}

/* ---------- Hero ---------- */
.hero{
  position:relative;color:#fff;overflow:hidden;
  background:
    radial-gradient(1100px 520px at 80% -10%,rgba(212,20,30,.42),transparent 60%),
    linear-gradient(160deg,#0b1734 0%,#12234c 55%,#0b1734 100%);
}
.grid-bg{
  position:absolute;inset:0;opacity:.16;
  background-image:linear-gradient(rgba(255,255,255,.5) 2px,transparent 2px),
                   linear-gradient(90deg,rgba(255,255,255,.5) 2px,transparent 2px);
  background-size:86px 86px;
  transform:skewY(-4deg) scale(1.25);
}
.hero-in{position:relative;padding:104px 0 112px;max-width:820px}
.eyebrow{
  display:inline-flex;align-items:center;gap:13px;font-size:clamp(14.5px,1.6vw,19px);font-weight:900;
  letter-spacing:.18em;text-transform:uppercase;color:#fff;
  background:rgba(212,20,30,.46);border:2px solid rgba(255,255,255,.42);
  padding:14px 28px;border-radius:999px;margin-bottom:30px;
  box-shadow:0 8px 26px rgba(212,20,30,.32);
}
.dot{width:9px;height:9px;border-radius:50%;background:var(--red);box-shadow:0 0 0 5px rgba(212,20,30,.34)}
.hero h1{font-size:clamp(38px,5.6vw,68px);margin-bottom:22px}
.hero h1 em{font-style:normal;color:#ff5a63}
.hero p{font-size:clamp(16.5px,1.9vw,20px);color:#c9d2e6;max-width:640px;margin-bottom:36px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:56px}
.hero .btn-ghost{color:#fff;border-color:rgba(255,255,255,.3)}
.hero .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.stats{display:flex;gap:52px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.16);padding-top:32px}
.stat b{display:block;font-size:clamp(26px,3.4vw,38px);font-weight:800;letter-spacing:-.03em}
.stat span{font-size:13px;color:#9fb0d0;text-transform:uppercase;letter-spacing:.1em;font-weight:600}

/* ---------- Marquee ---------- */
.marquee{background:var(--navy);border-top:3px solid var(--red);overflow:hidden;padding:16px 0}
.marquee-track{display:flex;gap:56px;white-space:nowrap;animation:slide 26s linear infinite;width:max-content}
.marquee-track span{color:rgba(255,255,255,.62);font-weight:800;font-size:15px;letter-spacing:.18em;text-transform:uppercase}
@keyframes slide{to{transform:translateX(-50%)}}

/* ---------- Sections ---------- */
section{padding:96px 0}
.alt{background:var(--paper)}
.head{max-width:720px;margin-bottom:52px}
.kicker{
  font-size:12px;font-weight:800;letter-spacing:.18em;text-transform:uppercase;
  color:var(--red);margin-bottom:14px;display:flex;align-items:center;gap:10px;
}
.kicker::before{content:"";width:30px;height:3px;background:var(--red);border-radius:2px}
.head h2{font-size:clamp(28px,3.9vw,44px);margin-bottom:16px}
.head p{color:var(--muted);font-size:17px}

/* ---------- Categories ---------- */
.cats{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}
.cat{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px;
  box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s,border-color .2s;
  position:relative;overflow:hidden;
}
.cat::after{
  content:"";position:absolute;inset:0 auto 0 0;width:4px;background:var(--red);
  transform:scaleY(0);transform-origin:top;transition:transform .24s;
}
.cat:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#cfd5e4}
.cat:hover::after{transform:scaleY(1)}
.cat-top{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.ico{
  flex:0 0 46px;height:46px;border-radius:11px;background:var(--navy);
  display:grid;place-items:center;color:#fff;
}
.ico svg{width:24px;height:24px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.cat h3{font-size:18.5px}
.cat .num{
  margin-inline-start:auto;font-size:12px;font-weight:800;color:#aab2c6;letter-spacing:.08em;
}
.cat ul{list-style:none;display:flex;flex-wrap:wrap;gap:7px;margin-top:4px}
.cat li{
  font-size:12.8px;font-weight:600;color:#41506e;background:#f1f3f8;
  border:1px solid #e4e8f1;padding:5px 11px;border-radius:999px;
}

/* ---------- Brands ---------- */
.brands{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:18px}
.brand{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:30px 22px;text-align:center;transition:transform .2s,box-shadow .2s;
}
.brand:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.brand b{display:block;font-size:19px;letter-spacing:-.01em;margin-bottom:5px}
.brand span{font-size:13px;color:var(--muted)}

/* ---------- Why ---------- */
.why{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:26px}
.why-item{padding:30px;background:#fff;border-radius:var(--r);border:1px solid var(--line)}
.why-item .n{
  width:42px;height:42px;border-radius:10px;background:var(--red);color:#fff;
  display:grid;place-items:center;font-weight:800;margin-bottom:16px;
}
.why-item h3{font-size:18px;margin-bottom:9px}
.why-item p{color:var(--muted);font-size:15px}

/* ---------- About ---------- */
.about{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.about p{color:var(--muted);font-size:16.5px;margin-bottom:16px}
.panel{
  background:var(--navy);color:#fff;border-radius:20px;padding:38px;position:relative;overflow:hidden;
}
.panel .grid-bg{opacity:.1}
.panel h3{position:relative;font-size:21px;margin-bottom:22px}
.panel ul{position:relative;list-style:none;display:grid;gap:14px}
.panel li{display:flex;gap:12px;font-size:15px;color:#cfd8ec}
.check{flex:0 0 20px;height:20px;border-radius:50%;background:var(--red);display:grid;place-items:center;margin-top:2px}
.check svg{width:11px;height:11px;stroke:#fff;stroke-width:3;fill:none}

/* ---------- CTA ---------- */
.cta{
  background:linear-gradient(135deg,var(--red) 0%,var(--red-dk) 100%);
  color:#fff;text-align:center;position:relative;overflow:hidden;
}
.cta .grid-bg{opacity:.13}
.cta h2{position:relative;font-size:clamp(28px,4vw,44px);margin-bottom:16px}
.cta p{position:relative;font-size:18px;opacity:.92;max-width:560px;margin:0 auto 32px}
.cta .btn{position:relative;background:#fff;color:var(--red-dk)}
.cta .btn:hover{background:#0d1b3e;color:#fff}

/* ---------- Contact ---------- */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:52px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;font-weight:700;margin-bottom:7px;color:var(--navy)}
.field input,.field select,.field textarea{
  width:100%;padding:13px 15px;border:1.5px solid var(--line);border-radius:10px;
  font-family:inherit;font-size:15px;background:#fff;transition:border-color .18s,box-shadow .18s;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--navy);box-shadow:0 0 0 4px rgba(13,27,62,.08);
}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.info-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;
  display:flex;gap:16px;margin-bottom:14px;
}
.info-card .ico{background:#f1f3f8;color:var(--navy)}
.info-card h4{font-size:15px;margin-bottom:3px}
.info-card p{color:var(--muted);font-size:14.5px}
.note{font-size:13px;color:var(--muted);margin-top:10px}

/* ---------- Footer ---------- */
footer{background:var(--navy);color:#fff;padding:64px 0 26px}
.f-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;margin-bottom:44px}
footer img.logo{width:320px;max-width:100%;height:auto;margin-bottom:22px}
footer p{color:#9fb0d0;font-size:14.5px}
footer h5{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:#fff;margin-bottom:16px}
footer ul{list-style:none;display:grid;gap:10px}
footer ul a{color:#9fb0d0;font-size:14.5px;transition:color .18s}
footer ul a:hover{color:#fff}
.f-bot{
  border-top:1px solid rgba(255,255,255,.14);padding-top:24px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#8494b4;
}

/* ---------- Responsive ---------- */
@media(max-width:940px){
  .about,.contact{grid-template-columns:1fr;gap:36px}
  .f-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:760px){
  .nav ul{
    display:none;position:absolute;top:86px;left:0;right:0;background:#fff;
    flex-direction:column;padding:18px 24px;gap:16px;border-bottom:1px solid var(--line);
    box-shadow:var(--shadow);
  }
  .nav ul.open{display:flex}
  .burger{display:block;order:3}
  .nav .btn-red{display:none}
  .hero-in{padding:72px 0 80px}
  .stats{gap:30px}
  section{padding:70px 0}
  .row2{grid-template-columns:1fr}
  .f-grid{grid-template-columns:1fr}
  .topbar{font-size:11px;letter-spacing:.1em;padding:9px 0}
  .topbar b{display:block}
  .topbar .sep{display:none}
}

/* ---------- honeypot (never visible) ---------- */
.hp{position:absolute!important;left:-9999px!important;top:auto!important;width:1px!important;height:1px!important;overflow:hidden!important}

/* ---------- Official Site badge ---------- */
.official-badge{
  display:block;width:fit-content;background:var(--navy);color:#fff;
  font-family:'Arial Black','Arial Bold',Arial,sans-serif;
  font-weight:900;font-style:italic;font-size:clamp(19px,2.4vw,28px);
  letter-spacing:.06em;line-height:1;padding:14px 26px 15px;
  border:3px solid #fff;transform:rotate(-3deg);
  box-shadow:8px 8px 0 rgba(212,20,30,.9);
  margin-bottom:30px;
}
.official-badge span{color:var(--red)}

/* brand name directly under the badge */
.hero .badge-brand{
  font-family:'Arial Black','Arial Bold',Arial,sans-serif!important;
  font-weight:900!important;font-style:italic!important;
  color:#ffffff!important;
  font-size:clamp(19px,2.4vw,28px)!important;
  letter-spacing:.05em;line-height:1.05;
  margin:0 0 30px 3px!important;max-width:none!important;
  white-space:nowrap;text-shadow:0 2px 0 rgba(0,0,0,.3);
}
.hero .badge-brand span{color:var(--red)!important}

/* ---------- OEM key line ---------- */
.oem-key{
  font-size:clamp(15px,1.7vw,19px)!important;font-weight:800;color:#8fa3c6!important;
  letter-spacing:.06em;text-transform:uppercase;margin-bottom:20px!important;
}
.oem-key span{
  color:#fff;font-size:1.28em;font-weight:900;
  border-bottom:3px solid var(--red);padding-bottom:1px;
}

/* ---------- Official Site bar ---------- */
.topbar{
  background:var(--red);color:#fff;text-align:center;
  font-size:13px;font-weight:800;letter-spacing:.18em;text-transform:uppercase;
  padding:11px 0;line-height:1.5;
}
.topbar b{color:#fff;font-weight:800}
.topbar .sep{opacity:.55;margin:0 12px}
/* ================= Interior pages ================= */
.page-hero{
  position:relative;color:#fff;overflow:hidden;padding:64px 0 68px;
  background:
    radial-gradient(900px 420px at 82% -20%,rgba(212,20,30,.40),transparent 60%),
    linear-gradient(160deg,#0b1734 0%,#12234c 55%,#0b1734 100%);
}
.page-hero .wrap{position:relative;max-width:var(--max)}
.page-hero h1{font-size:clamp(30px,4.4vw,50px);margin-bottom:14px;max-width:900px}
.page-hero p{color:#c9d2e6;font-size:clamp(15.5px,1.7vw,18px);max-width:720px}
.kicker.light{color:#ff8d94}
.kicker.light::before{background:var(--red)}

.wrap.narrow{max-width:860px}
.wrap.narrow h2{font-size:clamp(23px,2.7vw,31px);margin:44px 0 14px}
.wrap.narrow h2:first-child{margin-top:0}
.wrap.narrow p{color:var(--muted);font-size:16.5px;margin-bottom:14px}
.lede{font-size:18.5px!important;color:var(--ink)!important;line-height:1.65}

/* breadcrumbs */
.crumbs{background:var(--paper);border-bottom:1px solid var(--line);font-size:13.5px;padding:13px 0;color:var(--muted)}
.crumbs a{color:var(--navy);font-weight:600}
.crumbs a:hover{color:var(--red)}
.crumbs em{font-style:normal;opacity:.4;margin:0 4px}
.crumbs span{color:var(--muted)}

/* pill list */
.pill-list{list-style:none;display:flex;flex-wrap:wrap;gap:9px;margin:6px 0 4px}
.pill-list li{
  font-size:14px;font-weight:600;color:#41506e;background:#f1f3f8;
  border:1px solid #e4e8f1;padding:8px 15px;border-radius:999px;
}

.note-box{
  background:#fff7f7;border:1px solid #f3d3d5;border-inline-start:4px solid var(--red);
  border-radius:10px;padding:18px 20px;color:#5d4045!important;font-size:16px!important;
}

.chips{display:flex;flex-wrap:wrap;gap:10px;margin:8px 0 4px}
.chip{
  display:inline-block;font-size:14px;font-weight:700;color:var(--navy);
  border:1.5px solid var(--line);background:#fff;padding:9px 18px;border-radius:999px;
  transition:border-color .18s,color .18s,transform .18s;
}
.chip:hover{border-color:var(--red);color:var(--red);transform:translateY(-1px)}

/* FAQ */
.faqs{display:grid;gap:14px;margin-top:6px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px 24px;box-shadow:var(--shadow)}
.faq-item h3{font-size:17px;margin-bottom:8px;color:var(--navy)}
.faq-item p{color:var(--muted);font-size:15.5px;margin:0}

/* mini category grid on brand pages */
.minis{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;margin-top:6px}
.mini{
  display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);
  border-radius:12px;padding:14px 16px;box-shadow:var(--shadow);
  transition:transform .18s,box-shadow .18s,border-color .18s;
}
.mini:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:#cfd5e4}
.mini .ico{flex:0 0 38px;height:38px;border-radius:9px;background:var(--navy);display:grid;place-items:center;color:#fff}
.mini .ico svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.mini b{font-size:14.5px;line-height:1.3}

/* prev / next */
.prevnext{
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  margin-top:50px;padding-top:26px;border-top:1px solid var(--line);
  font-size:14.5px;font-weight:700;
}
.prevnext a{color:var(--navy);transition:color .18s}
.prevnext a:hover{color:var(--red)}

/* cards used as links */
a.cat,a.brand{display:block;color:inherit}
a.brand{text-align:center}


/* ---------- system diagrams ---------- */
.diagram{
  margin:6px 0 18px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r);padding:20px 20px 14px;box-shadow:var(--shadow);
  overflow-x:auto;
}
.diagram .sysdiag{width:100%;min-width:640px;height:auto;display:block}
.diagram figcaption{
  margin-top:12px;padding-top:11px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}
@media(max-width:620px){
  .hero .badge-brand{white-space:normal!important;font-size:clamp(18px,5.6vw,26px)!important;line-height:1.18}
}
@media(max-width:760px){
  .diagram{padding:14px 14px 10px}
  .diagram .sysdiag{min-width:560px}
  .diagram::before{
    content:"Swipe to see the full diagram \2192";
    display:block;font-size:12px;font-weight:700;letter-spacing:.04em;
    color:var(--red);margin:0 0 10px;text-transform:uppercase;
  }
}