:root {
  --bg: #f7fbff;
  --panel: #ffffff;
  --panel-soft: #eef6ff;
  --text: #19324a;
  --muted: #5d7388;
  --line: #d9e7f2;
  --primary: #1f6fb2;
  --primary-dark: #145182;
  --accent: #4fb6b1;
  --shadow: 0 18px 50px rgba(20, 81, 130, 0.12);
  --radius: 20px;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.container {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
}
.topbar {
  background: #10283d;
  color: #f4fbff;
  text-align: center;
  padding: 10px 14px;
  font-size: 14px;
}
.site-header {
  background: rgba(255,255,255,0.9);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 0;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 700;
  font-size: 22px;
}
.brand img { width: 42px; height: 42px; }
.site-nav {
  display: flex;
  gap: 24px;
  align-items: center;
}
.site-nav a {
  color: var(--text);
  font-weight: 600;
}
.site-nav a.active,
.site-nav a:hover {
  color: var(--primary);
  text-decoration: none;
}
.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 20px;
}
.section { padding: 80px 0; }
.section.light { background: #f1f7fc; }
.hero {
  padding: 88px 0 70px;
  background: radial-gradient(circle at top right, rgba(79,182,177,0.15), transparent 28%), linear-gradient(180deg, #fafdff 0%, #eef6ff 100%);
}
.hero-grid,
.product-grid,
.split-grid,
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  gap: 40px;
  align-items: center;
}
.hero-copy h1,
.page-hero h1,
.product-copy h1 {
  margin: 0 0 16px;
  line-height: 1.12;
  font-size: clamp(36px, 5vw, 58px);
}
.hero-copy .lead,
.page-hero p,
.product-copy p,
.prose-block p {
  color: var(--muted);
  font-size: 18px;
}
.eyebrow {
  margin: 0 0 10px;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 700;
  font-size: 12px;
}
.hero-actions,
.cta-stack {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin: 28px 0;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow);
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--line);
}
.btn-block { width: 100%; }
.trust-points {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
}
.trust-points li {
  padding-left: 24px;
  position: relative;
  margin: 8px 0;
}
.trust-points li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}
.hero-card,
.info-card,
.product-visual-card,
.contact-card,
.contact-form,
.notice-box,
.feature-item,
.details-panel,
.faq-list details {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.hero-card,
.product-visual-card,
.contact-card,
.contact-form {
  padding: 28px;
}
.hero-card h2,
.product-copy h1,
.info-card h3,
.feature-item h3 { margin-top: 0; }
.product-badge {
  display: inline-block;
  padding: 8px 12px;
  background: #e8f4ff;
  color: var(--primary);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 14px;
}
.device-visual {
  position: relative;
  min-height: 220px;
  margin-bottom: 22px;
  border-radius: 28px;
  background: linear-gradient(180deg, #f8fcff, #e4f0fa);
  overflow: hidden;
}
.device-visual.large { min-height: 360px; }
.device {
  position: absolute;
  border-radius: 999px;
  background: linear-gradient(180deg, #20384d, #0e2132);
  box-shadow: 0 14px 36px rgba(16, 40, 61, 0.25);
}
.device-main {
  width: 230px;
  height: 90px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) rotate(-14deg);
}
.device-small {
  width: 120px;
  height: 48px;
  left: 18%;
  top: 22%;
  transform: rotate(12deg);
}
.pulse {
  position: absolute;
  border-radius: 999px;
  border: 2px solid rgba(79,182,177,0.55);
}
.pulse-1 {
  width: 320px;
  height: 140px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) rotate(-14deg);
}
.pulse-2 {
  width: 270px;
  height: 110px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) rotate(-14deg);
}
.section-heading {
  margin-bottom: 30px;
  text-align: center;
}
.section-heading h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 42px);
}
.card-grid {
  display: grid;
  gap: 24px;
}
.card-grid.three { grid-template-columns: repeat(3, 1fr); }
.info-card { padding: 24px; }
.info-card p,
.feature-item p,
.notice-box,
.form-note,
.price,
.prose-block li,
.prose-block p { color: var(--muted); }
.split-grid { grid-template-columns: 1fr 1fr; }
.feature-list {
  display: grid;
  gap: 18px;
}
.feature-item { padding: 22px; }
.faq-list {
  display: grid;
  gap: 14px;
  max-width: 900px;
  margin: 0 auto;
}
.faq-list details { padding: 18px 22px; }
.faq-list summary {
  cursor: pointer;
  font-weight: 700;
}
.page-hero {
  padding-top: 70px;
  padding-bottom: 24px;
}
.narrow {
  max-width: 860px;
}
.prose-block h2 {
  margin-top: 30px;
  margin-bottom: 10px;
  font-size: 28px;
}
.price {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary-dark);
  margin: 8px 0 16px;
}
.mini-specs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.mini-specs span {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 999px;
  background: #eef6ff;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
}
.notice-box {
  padding: 18px 20px;
  margin-top: 18px;
  background: #f9fcff;
}
.contact-grid { align-items: start; }
.contact-form {
  display: grid;
  gap: 14px;
}
.contact-form label {
  display: grid;
  gap: 8px;
  font-weight: 700;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fff;
  font: inherit;
}
.site-footer {
  background: #0f2436;
  color: #dbeaf6;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 30px;
  padding: 56px 0 30px;
}
.site-footer h3,
.site-footer h4 {
  color: #fff;
  margin-top: 0;
}
.site-footer a {
  display: block;
  color: #dbeaf6;
  margin: 8px 0;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 18px 0 28px;
  color: #b9cedf;
}

@media (max-width: 960px) {
  .hero-grid,
  .product-grid,
  .split-grid,
  .contact-grid,
  .card-grid.three,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .site-nav {
    position: absolute;
    right: 16px;
    top: 74px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow);
    padding: 14px;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    min-width: 220px;
  }
  .site-nav.open { display: flex; }
  .nav-toggle { display: inline-block; }
}

@media (max-width: 640px) {
  .section { padding: 60px 0; }
  .hero { padding-top: 56px; }
  .hero-copy .lead,
  .page-hero p,
  .product-copy p,
  .prose-block p { font-size: 16px; }
  .btn { width: 100%; }
  .hero-actions,
  .cta-stack { flex-direction: column; }
}