:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --text: #102134;
  --muted: #4f647b;
  --line: #d8e2ec;
  --brand: #1f7ae0;
  --brand-2: #19b89c;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(16, 33, 52, 0.08);
  --max: 980px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Avenir Next", "SF Pro Text", "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(1000px 500px at 90% -20%, rgba(31, 122, 224, 0.18), transparent),
    radial-gradient(900px 450px at -10% -30%, rgba(25, 184, 156, 0.14), transparent),
    var(--bg);
  line-height: 1.6;
}

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

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: rgba(246, 248, 251, 0.88);
  border-bottom: 1px solid rgba(216, 226, 236, 0.8);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
  gap: 16px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0.2px;
}

.logo-badge {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(140deg, var(--brand), var(--brand-2));
  box-shadow: 0 6px 16px rgba(31, 122, 224, 0.25);
}

.nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 10px;
}

.nav a:hover,
.nav a.active {
  color: var(--brand);
  background: rgba(31, 122, 224, 0.08);
}

.hero {
  padding: 56px 0 24px;
}

.hero-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px;
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(30px, 4.8vw, 44px);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h2 {
  margin: 32px 0 10px;
  font-size: clamp(22px, 3.2vw, 28px);
  line-height: 1.25;
}

h3 {
  margin: 20px 0 8px;
  font-size: 20px;
}

p,
li {
  color: var(--text);
  font-size: 16px;
}

.lead {
  color: var(--muted);
  font-size: 18px;
  margin: 0;
}

.meta {
  margin-top: 16px;
  display: inline-flex;
  gap: 8px;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: #f0f5fa;
  color: #2f4a66;
  font-size: 14px;
  font-weight: 600;
}

.content {
  padding: 18px 0 56px;
}

.content-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 30px;
}

ul {
  padding-left: 20px;
}

li + li {
  margin-top: 8px;
}

.info-box {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid #c9ddf4;
  background: #eef6ff;
  color: #244665;
}

.footer {
  padding: 26px 0 34px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.tile {
  display: block;
  text-decoration: none;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.tile:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.tile strong {
  display: block;
  font-size: 18px;
  margin-bottom: 4px;
}

.small {
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 760px) {
  .header-inner {
    padding: 8px 0;
  }

  .hero-card,
  .content-card {
    padding: 22px;
  }

  .grid {
    grid-template-columns: 1fr;
  }
}