:root{
  --brand-dark:#3A4E60;
  --brand-blue:#36A1F2;
  --ink:#0f2536;
  --text:#1f2937;
  --muted:#6b7280;
  --bg:#ffffff;
  --soft:#f5f8fb;
  --maxw:1200px;
  --radius:16px;
  --shadow:0 12px 28px rgba(3,18,26,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--text);background:var(--bg)}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* Header / Nav */
header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid #eef1f5;backdrop-filter:saturate(180%) blur(6px);transition:box-shadow .25s ease,border-color .25s ease}
header.scrolled{box-shadow:0 8px 24px rgba(0,0,0,.08);border-bottom-color:#e1e8ef}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;transition:height .25s ease}
header.scrolled .nav{height:64px}
.brand{display:flex;gap:12px;align-items:center;text-decoration:none}
.brand img{height:36px}
.brand .title{font-weight:700;color:var(--brand-dark)}
.brand .subtitle{color:var(--muted);font-size:14px;margin-top:2px}
.brand .title,.brand .subtitle{ text-decoration:none }
nav ul{display:flex;gap:16px;list-style:none;padding:0;margin:0}
nav a{color:var(--ink);text-decoration:none;padding:10px 12px;border-radius:10px}
nav a:hover{background:#f2f6fa}
nav a.active{background:#e9f2ff;color:#155ea8;font-weight:600}

/* Hero */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background: radial-gradient(900px 300px at 90% -10%, rgba(54,161,242,.25), transparent),
              radial-gradient(900px 300px at 10% -20%, rgba(58,78,96,.35), transparent),
              #0f2536;
}
.hero::before{content:"";position:absolute;inset:0;background:url('../images/hero-bg.png') center/cover no-repeat;opacity:.25}
.hero .wrap{position:relative;padding:88px 0 76px}
h1{font-size:42px;line-height:1.1;margin:0 0 12px}
.lead{font-size:18px;color:#d8e6f2;max-width:780px}

/* Buttons */
.cta{display:inline-flex;align-items:center;gap:10px;margin-top:18px;padding:14px 20px;background:var(--brand-blue);color:#fff;border:none;border-radius:12px;box-shadow:var(--shadow);cursor:pointer;text-decoration:none;font-weight:600}
.cta.alt{background:var(--brand-dark)}
.cta:hover{filter:brightness(1.05)}
.cta svg{flex-shrink:0}

/* Sections */
.section{padding:72px 0}
.section.alt{background:var(--soft)}
.section h2{font-size:34px;margin:0 0 8px}
.eyebrow{display:inline-block;background:#e8f3ff;color:#155ea8;padding:6px 10px;border-radius:999px;font-weight:600;font-size:12px;margin-bottom:10px}
.sub{color:#5b6b7a;margin:0 0 18px}

/* Layout */
.grid2{display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:center}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{border:1px solid #e9eef4;border-radius:18px;box-shadow:var(--shadow);padding:24px;background:#fff}
.figure{border-radius:18px;overflow:hidden;box-shadow:var(--shadow)}
.figure img{width:100%;height:auto;display:block}

/* Feature cards */
.feature{display:flex;gap:14px;align-items:flex-start}
.icon{width:36px;height:36px;border-radius:10px;background:#eaf3ff;display:flex;align-items:center;justify-content:center}
.icon svg{width:18px;height:18px;stroke:#155ea8}

/* Timeline */
.timeline{display:grid;gap:14px;margin-top:10px}
.step{display:grid;grid-template-columns:48px 1fr;gap:12px;align-items:start}
.badge-num{width:40px;height:40px;border-radius:999px;background:#eaf3ff;color:#155ea8;display:flex;align-items:center;justify-content:center;font-weight:700}

/* Comparison */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.compare .panel{border-radius:18px;background:#fff;box-shadow:var(--shadow);padding:20px;border:1px solid #e9eef4}
.compare h3{margin-top:0}

/* FAQ Accordion */
.faq{display:grid;gap:10px}
.faq details{border:1px solid #e9eef4;border-radius:12px;padding:12px 14px;background:#fff;box-shadow:var(--shadow)}
.faq summary{cursor:pointer;font-weight:600}
.faq p{margin:8px 0 0}

/* Footer */
footer{margin-top:40px;padding:28px 0 60px;background:#0f2536;color:#b9c8d6}
.footer-inner{display:flex;align-items:center;justify-content:space-between}
address{font-style:normal;color:#d9e6f2}

/* Mobile */
@media (max-width:980px){
  .grid2{grid-template-columns:1fr;gap:22px}
  .grid3{grid-template-columns:1fr}
  h1{font-size:34px}
}

/* Mobile menu & back-to-top (from previous versions) */
.menu-toggle{display:none;align-items:center;justify-content:center;width:42px;height:42px;border:1px solid #e2e8f0;border-radius:12px;background:#fff;cursor:pointer;font-size:22px;line-height:1;color:var(--brand-dark)}
.menu-toggle:focus{outline:2px solid var(--brand-blue);outline-offset:2px}
.mobile-overlay{position:fixed;inset:0;background:rgba(15,37,54,.96);color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;transform:translateY(-100%);transition:transform .28s ease;z-index:60;padding:24px}
.mobile-overlay.open{transform:translateY(0)}
.mobile-overlay nav{width:100%}
.mobile-overlay ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:14px;align-items:center}
.mobile-overlay a{color:#eaf3ff;text-decoration:none;font-size:22px;font-weight:700;padding:10px 16px;border-radius:12px}
.mobile-overlay a:hover{background:rgba(255,255,255,.08)}
.mobile-overlay .close{position:absolute;top:18px;right:18px;width:42px;height:42px;display:flex;align-items:center;justify-content:center;border:1px solid rgba(255,255,255,.25);border-radius:12px;cursor:pointer;background:transparent;color:#fff;font-size:22px}
nav ul{flex-wrap:wrap}
@media (max-width:980px){ nav ul{display:none}.menu-toggle{display:inline-flex}.brand img{height:32px}.brand .title{font-size:16px}.brand .subtitle{font-size:12px} }

/* Back to top */
.back-to-top{position:fixed;right:20px;bottom:20px;width:48px;height:48px;border-radius:50%;background:var(--brand-blue);color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;cursor:pointer;box-shadow:var(--shadow);border:none;z-index:80;opacity:0;pointer-events:none;transition:opacity .25s ease,transform .25s ease}
.back-to-top.visible{opacity:1;pointer-events:auto;transform:translateY(0)}
.back-to-top:hover{filter:brightness(1.05)}