/* ============ Design tokens ============ */
:root{
  --ink: #0B2A3D;
  --ink-2: #12364F;
  --text: #10212E;
  --muted: #5B6B76;

  --bg: #FFFFFF;
  --bg-alt: #F6F8FA;
  --line: #E3E8EC;

  --brand: #1D6FA3;
  --brand-2:#2A86BF;
  --accent:#18A999;

  --radius: 16px;
  --radius-lg: 22px;
  --shadow: 0 12px 30px rgba(16,33,46,.08);

  --container: 1120px;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color: var(--text);
  background: var(--bg);
  line-height:1.55;
}
img{ max-width:100%; height:auto; display:block; }
a{ color: var(--brand); text-decoration:none; }
a:hover{ text-decoration:underline; }
.container{ width:min(var(--container), calc(100% - 32px)); margin-inline:auto; }
.sr-only{ position:absolute !important; width:1px;height:1px; padding:0;margin:-1px;overflow:hidden; clip:rect(0,0,0,0);white-space:nowrap;border:0; }
.skip-link{ position:absolute; left:-999px; top:8px; background: var(--ink); color:white; padding:10px 12px; border-radius:12px; z-index:9999; }
.skip-link:focus{ left: 12px; }

.site-header{ position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.86); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.header-inner{ display:flex; align-items:center; justify-content:space-between; padding: 14px 0; gap: 16px; }
.brand{ display:flex; align-items:center; gap:10px; }
.nav{ display:flex; align-items:center; gap: 18px; }
.nav a{ color: var(--ink); font-weight: 600; font-size: 14px; }
.nav a.btn{ color:#fff; }

.nav-toggle{ display:none; background:transparent; border:1px solid var(--line); padding:10px; border-radius: 14px; }
.nav-toggle__bar{ display:block; width:22px; height:2px; background: var(--ink); margin: 4px 0; }
@media (max-width: 860px){
  .nav-toggle{ display:block; }
  .nav{ position: absolute; right: 16px; top: 64px; width: min(360px, calc(100% - 32px)); background: white; border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: 14px; display:none; flex-direction:column; align-items:stretch; gap: 10px; }
  .nav[data-open="true"]{ display:flex; }
  .nav a{ padding: 10px 10px; border-radius: 12px; }
  .nav a:hover{ background: var(--bg-alt); text-decoration:none; }
}

.btn{ display:inline-flex; align-items:center; justify-content:center; padding: 12px 16px; border-radius: 999px; background: var(--ink); color: #fff; font-weight: 700; border: 1px solid transparent; box-shadow: 0 8px 18px rgba(11,42,61,.12); }
.btn:hover{ text-decoration:none; filter: brightness(1.03); }
.btn--ghost{ background: transparent; color: var(--ink); border-color: var(--line); box-shadow: none; }
.btn--small{ padding: 9px 12px; font-size: 14px; }

.hero{ padding: 56px 0 28px; border-bottom: 1px solid var(--line); }
.hero-grid{ display:grid; grid-template-columns: 1.15fr .85fr; gap: clamp(20px, 5vw, 52px); align-items:center; }
.eyebrow{ font-weight: 800; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.hero h1{ margin: 10px 0 10px; font-size: clamp(32px, 4.2vw, 52px); line-height: 1.08; letter-spacing: -0.02em; color: var(--ink); }
.muted{ color: var(--muted); font-weight: 700; }
.lead{ font-size: 18px; color: #233847; max-width: 54ch; }
.hero-cta{ display:flex; gap: 12px; flex-wrap:wrap; margin-top: 16px; }
.hero-bullets{ margin: 18px 0 0; padding-left: 18px; color: var(--muted); }
.hero-art{ background: radial-gradient(60% 60% at 70% 30%, rgba(24,169,153,.18), transparent 70%), radial-gradient(50% 50% at 20% 70%, rgba(29,111,163,.18), transparent 70%); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 14px; }
@media (max-width: 860px){ .hero-grid{ grid-template-columns: 1fr; } .hero{ padding-top: 40px; } }

.trust-strip{ padding: 26px 0; background: var(--bg); }
.trust-grid{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.trust-card{ border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; background: #fff; }
.trust-card h3{ margin:0 0 6px; color: var(--ink); }
.trust-card p{ margin:0; color: var(--muted); }
@media (max-width: 860px){ .trust-grid{ grid-template-columns: 1fr; } }

.section{ padding: 56px 0; }
.section--alt{ background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head{ margin-bottom: 22px; }
.section-head h2{ margin:0 0 8px; font-size: clamp(24px, 2.6vw, 34px); color: var(--ink); letter-spacing: -0.015em; }
.subhead{ margin:0; color: var(--muted); max-width: 70ch; }

.cards{ display:grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.card{ border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 18px; background: #fff; box-shadow: 0 10px 24px rgba(16,33,46,.05); }
.card-icon{ width: 38px; height: 38px; margin-bottom: 12px; }
.card h3{ margin:0 0 8px; color: var(--ink); }
.card p{ margin:0; color: var(--muted); }
@media (max-width: 980px){ .cards{ grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px){ .cards{ grid-template-columns: 1fr; } }

.steps{ list-style:none; padding:0; margin:0; display:grid; gap: 14px; }
.step{ display:flex; gap: 14px; padding: 16px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; }
.step-num{ width: 42px; height: 42px; display:grid; place-items:center; border-radius: 14px; background: linear-gradient(135deg, rgba(29,111,163,.18), rgba(24,169,153,.18)); color: var(--ink); font-weight: 900; }
.step-body h3{ margin:0 0 6px; color: var(--ink); }
.step-body p{ margin:0; color: var(--muted); }

.usecase-grid{ display:grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.usecase{ padding: 18px; border-radius: var(--radius-lg); border: 1px solid var(--line); background:#fff; }
.usecase h3{ margin:0 0 8px; color: var(--ink); }
.usecase p{ margin:0; color: var(--muted); }
@media (max-width: 760px){ .usecase-grid{ grid-template-columns: 1fr; } }
.callout{ margin-top: 18px; border-left: 4px solid var(--accent); background: #fff; border-radius: var(--radius); border: 1px solid var(--line); padding: 14px 14px 14px 16px; }
.callout p{ margin:0; color: var(--text); }

.contact{ display:grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items:start; }
.contact-box{ margin-top: 14px; border: 1px solid var(--line); border-radius: var(--radius-lg); background:#fff; padding: 16px; }
.contact-form{ border: 1px solid var(--line); border-radius: var(--radius-lg); background:#fff; padding: 16px; box-shadow: 0 10px 24px rgba(16,33,46,.05); }
label{ display:block; font-weight: 700; color: var(--ink); margin-bottom: 10px; }
input, textarea{ width:100%; margin-top: 6px; padding: 12px 12px; border-radius: 14px; border: 1px solid var(--line); font: inherit; }
input:focus, textarea:focus{ outline: 3px solid rgba(29,111,163,.18); border-color: rgba(29,111,163,.5); }
.small{ font-size: 13px; }
@media (max-width: 860px){ .contact{ grid-template-columns: 1fr; } }

.site-footer{ border-top: 1px solid var(--line); padding: 28px 0; background: #fff; }
.footer-inner{ display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap: 14px; }
.footer-brand{ display:flex; gap: 12px; align-items:center; }
.footer-title{ margin:0; font-weight: 900; color: var(--ink); }
.footer-links{ display:flex; gap: 14px; }
.footer-links a{ color: var(--muted); font-weight: 700; }

.form-status{ margin-top: 12px; padding: 12px 14px; border-radius: var(--radius); border: 1px solid var(--line); background: #fff; color: var(--muted); display:none; }
.form-status--ok{ display:block; border-left: 4px solid var(--accent); }
.form-status--err{ display:block; border-left: 4px solid #D64545; color: #7B2A2A; }
.hp{ position:absolute; left:-9999px; width:1px;height:1px; opacity:0; }

/* FAQ page */
.faq-hero{padding:42px 0 18px;border-bottom:1px solid var(--line);}
.faq-hero h1{margin:0 0 8px;color:var(--ink);letter-spacing:-.02em;font-size:clamp(28px,3.2vw,44px);}
.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 10px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--muted);font-weight:700;font-size:12px;}
.model-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:18px;}
@media(max-width:860px){.model-grid{grid-template-columns:1fr;}}
.model-card{border:1px solid var(--line);border-radius:var(--radius-lg);background:#fff;box-shadow:0 10px 24px rgba(16,33,46,.05);padding:18px;}
.model-head{display:flex;gap:14px;align-items:center;margin-bottom:10px;}
.model-logo{width:54px;height:54px;border-radius:16px;border:1px solid var(--line);background:linear-gradient(135deg, rgba(29,111,163,.16), rgba(24,169,153,.14));display:grid;place-items:center;flex:0 0 auto;}
.model-title{margin:0;color:var(--ink);font-size:18px;font-weight:900;}
.model-sub{margin:2px 0 0;color:var(--muted);font-weight:700;font-size:13px;}
.procon{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px;}
@media(max-width:560px){.procon{grid-template-columns:1fr;}}
.pro,.con{border:1px solid var(--line);border-radius:16px;padding:12px;background:var(--bg-alt);}
.pro h3,.con h3{margin:0 0 8px;font-size:14px;color:var(--ink);}
.pro ul,.con ul{margin:0;padding-left:18px;color:var(--muted);}
.kv{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px;}
.kv span{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New";font-size:12px;padding:6px 8px;border-radius:999px;border:1px solid var(--line);background:#fff;color:#233847;}