body {
  font-family: "Microsoft YaHei", sans-serif;
  background-color: #f5f7fa;
  margin: 0;
  padding: 0;
  color: #333;
}

header {
  background-color: #0066cc;
  color: white;
  text-align: center;
  padding: 1rem 0;
}

main {
  max-width: 600px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.search-section {
  text-align: center;
  margin-bottom: 1.5rem;
}

input, button {
  font-size: 1rem;
  padding: 0.5rem;
}

.primary-btn, .scan-btn {
  background-color: #007aff;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.primary-btn:hover, .scan-btn:hover {
  background-color: #005ecb;
}

.loading {
  text-align: center;
  color: #555;
  margin: 1rem 0;
}

.message {
  background: #fffae6;
  border: 1px solid #ffe58f;
  color: #8c6d1f;
  padding: 0.6rem;
  border-radius: 4px;
  text-align: center;
}

.result-section {
  background-color: #fff;
  border-radius: 8px;
  padding: 1rem;
  box-shadow: 0 0 10px rgba(0,0,0,0.05);
}

footer {
  text-align: center;
  color: #888;
  font-size: 0.9rem;
  padding: 1rem 0;
}