:root {
  color-scheme: light;
  --ink: #14305c;
  --primary: #387af5;
  --deep: #4557d6;
  --mint: #42c2e0;
  --pale: #e8f6ff;
  --surface: rgba(255, 255, 255, 0.88);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 88% 8%, rgba(66, 194, 224, 0.2), transparent 28rem),
    radial-gradient(circle at 5% 90%, rgba(69, 87, 214, 0.14), transparent 32rem),
    linear-gradient(135deg, #f0faff, #dceeff 58%, #eeeeff);
}

a { color: var(--deep); }

.shell {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: 64px 0 56px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 52px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-size: 19px;
  font-weight: 760;
  text-decoration: none;
}

.mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: white;
  border-radius: 13px;
  background: linear-gradient(135deg, var(--primary), var(--deep));
  box-shadow: 0 9px 24px rgba(56, 122, 245, 0.25);
}

.links { display: flex; gap: 18px; }
.links a { font-weight: 650; text-decoration: none; }

h1 {
  margin: 0 0 16px;
  font-size: clamp(36px, 8vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.lead {
  max-width: 650px;
  margin: 0 0 32px;
  color: rgba(20, 48, 92, 0.7);
  font-size: 19px;
  font-weight: 550;
  line-height: 1.7;
}

.card {
  margin: 18px 0;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.95);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: 0 16px 38px rgba(69, 87, 214, 0.09);
}

.card h2 { margin: 0 0 12px; font-size: 23px; }
.card p, .card li { color: rgba(20, 48, 92, 0.74); line-height: 1.75; }
.card p:last-child { margin-bottom: 0; }
.card ul { margin: 8px 0 0; padding-left: 22px; }

.badge {
  display: inline-flex;
  margin-bottom: 18px;
  padding: 7px 12px;
  color: var(--deep);
  border-radius: 999px;
  background: var(--pale);
  font-size: 14px;
  font-weight: 750;
}

.contact {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  padding: 12px 16px;
  color: white;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--deep));
  font-weight: 720;
  text-decoration: none;
}

footer {
  margin-top: 42px;
  color: rgba(20, 48, 92, 0.5);
  font-size: 14px;
  text-align: center;
}

@media (max-width: 560px) {
  .shell { padding-top: 28px; }
  .nav { align-items: flex-start; margin-bottom: 38px; }
  .links { flex-direction: column; gap: 8px; text-align: right; }
  .card { padding: 20px; border-radius: 20px; }
}