* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  color: #e8eef2;
}
.card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  padding: 40px 48px;
  max-width: 640px;
  backdrop-filter: blur(8px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}
.logo { height: 48px; margin-bottom: 16px; }
h1 { color: #4fc3f7; font-size: 2rem; margin-bottom: 8px; }
.sub { color: #a8bcc8; margin-bottom: 24px; font-size: 0.95rem; }
.checks { list-style: none; margin-bottom: 24px; }
.checks li {
  padding: 8px 12px;
  margin-bottom: 6px;
  background: rgba(79, 195, 247, 0.08);
  border-left: 3px solid #4fc3f7;
  border-radius: 4px;
  font-size: 0.9rem;
}
.meta { color: #7d94a3; font-size: 0.85rem; }
code {
  background: rgba(0, 0, 0, 0.35);
  padding: 2px 8px;
  border-radius: 4px;
  color: #ffd54f;
}