* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f5f5f5;
  padding: 20px;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  background-color: #fff;
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1 {
  font-size: 24px;
  text-align: center;
  margin-bottom: 30px;
  color: #333;
}

h2 {
  font-size: 18px;
  margin: 25px 0 15px 0;
  color: #333;
  border-bottom: 1px solid #e0e0e0;
  padding-bottom: 8px;
}

h3 {
  font-size: 16px;
  margin: 20px 0 12px 0;
  color: #444;
}

p {
  margin-bottom: 12px;
  text-align: justify;
}

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

li {
  margin-bottom: 8px;
}

@media (max-width: 768px) {
  body {
    padding: 10px;
  }

  .container {
    padding: 20px;
  }

  h1 {
    font-size: 20px;
  }

  h2 {
    font-size: 16px;
  }
}