@import url("https://fonts.googleapis.com/css2?family=Barlow:wght@400;500;600;700;800&display=swap");

:root {
  --bg: #071225;
  --bg-soft: #0b1f3f;
  --surface: rgba(14, 32, 63, 0.74);
  --surface-strong: rgba(10, 25, 50, 0.92);
  --text: #eaf1ff;
  --muted: #b8c5df;
  --primary: #4c8dff;
  --primary-dark: #2d6de2;
  --border: rgba(120, 159, 232, 0.34);
  --ok: #57cf9e;
  --max: 1260px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Barlow", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background:
    radial-gradient(1400px 900px at 85% -10%, rgba(54, 104, 217, 0.38), transparent 54%),
    radial-gradient(1100px 760px at -15% 0%, rgba(39, 90, 206, 0.34), transparent 58%),
    linear-gradient(180deg, #08162d 0%, #071225 48%, #060f20 100%);
  color: var(--text);
  line-height: 1.88;
  letter-spacing: 0.01em;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(var(--max), 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--border);
  background: rgba(7, 18, 37, 0.78);
  backdrop-filter: blur(12px);
}

.header-inner {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-weight: 800;
  color: var(--primary);
  font-size: 1.24rem;
  letter-spacing: 0.06em;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.nav a {
  color: var(--muted);
  font-size: 1rem;
  padding: 4px 2px;
}

.nav a.active,
.nav a:hover {
  color: var(--primary);
}

.hero {
  padding: 132px 0 88px;
}

.hero h1 {
  margin: 0 0 22px;
  font-size: clamp(2.4rem, 4.3vw, 4.2rem);
  line-height: 1.15;
  letter-spacing: 0.01em;
}

.hero .subtitle {
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 24px;
  font-size: 1.15rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero p {
  color: var(--muted);
  max-width: 980px;
  font-size: 1.13rem;
  margin-bottom: 18px;
}

.section {
  padding: 86px 0;
}

.section h2 {
  margin: 0 0 20px;
  font-size: clamp(1.6rem, 2.9vw, 2.5rem);
  letter-spacing: 0.01em;
}

.section h3 {
  margin: 0 0 14px;
  font-size: 1.28rem;
  line-height: 1.3;
}

.section p {
  color: var(--muted);
  margin: 0 0 16px;
  font-size: 1.08rem;
  max-width: 980px;
}

.section-intro {
  max-width: 980px;
  margin-bottom: 26px;
}

.section-intro p:last-child {
  margin-bottom: 0;
}

.grid {
  display: grid;
  gap: 26px;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  align-items: stretch;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 30px;
  box-shadow: inset 0 1px 0 rgba(160, 189, 244, 0.16), 0 18px 44px rgba(2, 8, 22, 0.36);
  height: 100%;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 1.03rem;
}

.list {
  padding-left: 24px;
  margin: 20px 0 0;
}

.list li {
  margin: 11px 0;
  color: var(--muted);
  font-size: 1.06rem;
  max-width: 1000px;
}

.check-list {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: grid;
  gap: 15px;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.check-list li {
  background: var(--surface-strong);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px 18px;
  font-size: 1.04rem;
}

.check-list li::before {
  content: "✔ ";
  color: var(--ok);
}

.cta {
  display: inline-block;
  margin-top: 24px;
  background: var(--primary);
  color: #f8fbff;
  padding: 14px 22px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.02em;
  box-shadow: 0 12px 26px rgba(35, 98, 233, 0.32);
}

.cta:hover {
  background: var(--primary-dark);
}

.notice {
  background: rgba(16, 36, 70, 0.86);
  border: 1px solid rgba(130, 168, 238, 0.42);
  padding: 24px;
  border-radius: 16px;
  color: #d2def5;
}

.notice p {
  margin: 0 0 14px;
}

.notice p:last-child {
  margin-bottom: 0;
}

.meta-note {
  margin-top: 22px;
  max-width: 980px;
  color: #c7d6f4;
  font-size: 1rem;
}

.split {
  display: grid;
  gap: 30px;
  grid-template-columns: 1.25fr 1fr;
  align-items: start;
}

.section-label {
  display: inline-block;
  margin-bottom: 14px;
  color: #99bbff;
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.site-footer {
  margin-top: 58px;
  border-top: 1px solid var(--border);
  background: rgba(7, 18, 37, 0.82);
}

.footer-inner {
  padding: 34px 0 44px;
  color: var(--muted);
  font-size: 0.98rem;
}

@media (max-width: 980px) {
  .split {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .header-inner {
    padding: 12px 0;
  }

  .hero {
    padding: 94px 0 56px;
  }

  .section {
    padding: 62px 0;
  }
}