body {
  font-family: 'Arial', sans-serif;
  margin: 0;
  padding: 0;
}

.header {
  background-color: #333;
  padding: 10px;
  color: white;
}

.navigation a, .navigation span {
  margin-right: 20px;
  cursor: pointer;
}

.banner {
  background-color: #555;
  color: white;
  padding: 20px;
  text-align: center;
}

.service {
  border: 1px solid #ddd;
  margin-top: 20px;
  padding: 10px;
}

footer {
  background-color: #333;
  color: white;
  text-align: center;
  padding: 10px;
}