body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  background-color: #f9f9f9;
}

h1 {
  color: #2c3e50;
  text-align: center;
  margin-bottom: 30px;
  font-size: 2.5em;
}

h2 {
  color: #34495e;
  border-bottom: 2px solid #3498db;
  padding-bottom: 10px;
  margin-top: 40px;
  font-size: 1.8em;
}

h3 {
  color: #34495e;
  margin-top: 30px;
  font-size: 1.4em;
}

p {
  margin-bottom: 15px;
}

ul {
  margin-left: 20px;
  margin-bottom: 15px;
}

li {
  margin-bottom: 5px;
}

strong {
  font-weight: bold;
  color: #2c3e50;
}

a {
  color: #3498db;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  background-color: white;
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
  body {
    padding: 10px;
    font-size: 14px;
  }

  .container {
    padding: 20px;
    border-radius: 5px;
  }

  h1 {
    font-size: 2em;
    margin-bottom: 20px;
  }

  h2 {
    font-size: 1.5em;
    margin-top: 30px;
    padding-bottom: 8px;
  }

  h3 {
    font-size: 1.2em;
    margin-top: 20px;
  }

  ul {
    margin-left: 15px;
  }

  li {
    margin-bottom: 8px;
  }
}

@media (max-width: 480px) {
  body {
    padding: 5px;
    font-size: 13px;
  }

  .container {
    padding: 15px;
    box-shadow: 0 1px 5px rgba(0, 0, 0, 0.1);
  }

  h1 {
    font-size: 1.8em;
    margin-bottom: 15px;
  }

  h2 {
    font-size: 1.3em;
    margin-top: 25px;
    padding-bottom: 5px;
  }

  h3 {
    font-size: 1.1em;
    margin-top: 15px;
  }

  p {
    margin-bottom: 10px;
  }

  ul {
    margin-left: 10px;
  }

  li {
    margin-bottom: 5px;
  }
}