:root {
  --blue: #0b74b8;
  --blue-deep: #0a4d8c;
  --text: #0f172a;
  --muted: #64748b;
  --line: #d0e4f5;
  --bg: #f0f7fc;
  --card: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #e8f4fc 0%, var(--bg) 40%, #ffffff 100%);
  line-height: 1.65;
}

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

.top {
  background: linear-gradient(135deg, var(--blue-deep), var(--blue));
  color: #fff;
  padding: 28px 20px 36px;
  text-align: center;
}

.top-inner {
  max-width: 720px;
  margin: 0 auto;
}

.hero-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 14px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.16);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.22);
}

.hero-icon svg {
  width: 32px;
  height: 32px;
  fill: none;
  stroke: #fff;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.brand {
  font-weight: 800;
  letter-spacing: 0.08em;
  font-size: 13px;
  opacity: 0.9;
  margin: 0 0 10px;
}

.top h1 {
  margin: 0 0 8px;
  font-size: 1.65rem;
  font-weight: 800;
  line-height: 1.25;
}

.meta {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0.92;
}

.wrap {
  max-width: 720px;
  margin: -18px auto 48px;
  padding: 0 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px 20px 28px;
  box-shadow: 0 10px 30px rgba(10, 77, 140, 0.06);
}

.intro {
  margin: 0 0 22px;
  color: var(--text);
  font-size: 0.98rem;
}

section {
  margin: 0 0 22px;
  padding-top: 4px;
  border-top: 1px solid #eef2f7;
}

section:first-of-type {
  border-top: none;
  padding-top: 0;
}

section h2 {
  margin: 16px 0 8px;
  font-size: 1.05rem;
  color: var(--blue-deep);
  font-weight: 800;
}

section p {
  margin: 0 0 10px;
  color: #334155;
  font-size: 0.95rem;
}

.footer {
  max-width: 720px;
  margin: 0 auto 40px;
  padding: 0 16px;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
  justify-content: center;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
}

.nav-links a svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.btn {
  display: inline-block;
  margin-top: 8px;
  background: var(--blue);
  color: #fff !important;
  text-decoration: none;
  padding: 12px 18px;
  border-radius: 12px;
  font-weight: 700;
}

@media (min-width: 640px) {
  .card {
    padding: 28px 32px 36px;
  }

  .top h1 {
    font-size: 1.9rem;
  }
}