/* 基本样式 */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  background-color: #fff;
  color: #333;
  line-height: 1.6;
}

header {
  background-color: #0b5fff;
  color: white;
  padding: 16px;
  text-align: center;
}

header h1 {
  margin: 0;
}

nav a {
  color: white;
  margin: 0 10px;
  text-decoration: none;
}

nav a:hover {
  text-decoration: underline;
}

main {
  max-width: 900px;
  margin: 20px auto;
  padding: 0 16px;
}

section {
  margin-bottom: 40px;
}

h2 {
  color: #0b2540;
}

h3 {
  color: #333;
}

footer {
  text-align: center;
  padding: 16px;
  background: #f6f7fb;
}

footer p {
  margin: 0;
}

footer a {
  color: #0b5fff;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
  main {
    padding: 0 20px;
  }

  nav a {
    display: block;
    margin: 5px 0;
  }
}