*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  color: #1a1a2e;
  background: #f4f6fb;
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.header {
  background: linear-gradient(135deg, #2563eb, #1e40af);
  color: #fff;
  padding: 2.5rem 0;
}

.header h1 {
  margin: 0 0 0.25rem;
  font-size: 1.75rem;
}

.tagline {
  margin: 0;
  opacity: 0.9;
}

main {
  padding: 2rem 0 3rem;
}

.intro {
  background: #fff;
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 0 1px 3px rgb(0 0 0 / 8%);
}

h2 {
  font-size: 1.25rem;
  margin: 0 0 1rem;
}

.table-wrap {
  overflow-x: auto;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 1px 3px rgb(0 0 0 / 8%);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th,
td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid #e5e7eb;
}

th {
  background: #f8fafc;
  font-weight: 600;
}

.note {
  font-size: 0.85rem;
  color: #64748b;
  margin-top: 0.75rem;
}

.card-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.card {
  flex: 1 1 240px;
  background: #fff;
  border-radius: 12px;
  padding: 1.25rem;
  box-shadow: 0 1px 3px rgb(0 0 0 / 8%);
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  color: #2563eb;
}

.card p {
  margin: 0;
  font-size: 0.9rem;
  color: #475569;
}

.footer {
  padding: 1.5rem 0;
  text-align: center;
  font-size: 0.8rem;
  color: #94a3b8;
}

@media (max-width: 640px) {
  th,
  td {
    padding: 0.5rem;
    font-size: 0.8rem;
  }
}