body {
      font-family: 'Open Sans', sans-serif;
      background-color: #f5f5f5;
      color: #333;
      margin: 0;
      padding: 0;
      line-height: 1.6;
}
header {
  background-color: #004080;
  color: #fff;
  padding: 20px 0;
  text-align: center;
}
header h1 {
  margin: 0;
  font-size: 2rem;
}
.container {
  max-width: 960px;
  margin: 30px auto;
  background-color: #fff;
  padding: 30px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
h2 {
  color: #004080;
  border-bottom: 2px solid #004080;
  padding-bottom: 5px;
}
ul {
  list-style-type: none;
  padding-left: 0;
}
li {
  padding: 10px 0;
  border-bottom: 1px solid #ddd;
}
li:last-child {
  border-bottom: none;
}
.model-title {
  font-weight: bold;
}
.sub-list {
  margin-left: 20px;
  list-style-type: disc;
}
a {
  color: #004080;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
footer {
  text-align: center;
  padding: 20px;
  background-color: #004080;
  color: #fff;
  margin-top: 30px;
}