* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: #f6f7f9;
  color: #1f2933;
  line-height: 1.7;
}

.container {
  width: min(980px, 92vw);
  margin: 0 auto;
  padding: 48px 0;
}

.hero {
  padding: 48px;
  background: linear-gradient(135deg, #ffffff, #eef3ff);
  border-radius: 24px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
  margin-bottom: 28px;
}

.tag {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: #e8eefc;
  color: #3557a3;
  font-weight: 600;
  font-size: 14px;
}

h1 {
  margin: 0 0 16px;
  font-size: 36px;
  line-height: 1.25;
}

.subtitle {
  font-size: 18px;
  color: #52616b;
  max-width: 760px;
}

.card {
  background: #ffffff;
  border-radius: 20px;
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.06);
}

.card h2 {
  margin-top: 0;
}

.button {
  display: inline-block;
  margin-top: 12px;
  padding: 10px 18px;
  border-radius: 12px;
  background: #2563eb;
  color: white;
  text-decoration: none;
  font-weight: 600;
}

.button:hover {
  background: #1d4ed8;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.mini-card {
  background: #ffffff;
  border-radius: 18px;
  padding: 24px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.05);
}

.mini-card h3 {
  margin-top: 0;
}

.mini-card p {
  color: #52616b;
}

@media (max-width: 720px) {
  .hero {
    padding: 28px;
  }

  h1 {
    font-size: 28px;
  }

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