.content {
     background: #f9f9f9;
     padding: 30px;
     border-radius: 8px;
     box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
     margin-bottom: 30px;
 }

 .systems {
     display: grid;
     grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
     gap: 20px;
     margin-top: 40px;
 }

 .system-card {
     background: white;
     border-radius: 8px;
     padding: 20px;
     box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
     transition: transform 0.3s ease;
     text-align: center;
     border-top: 4px solid #3498db;
 }

 .system-card:hover {
     transform: translateY(-5px);
     box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
 }

 .system-card h3 {
     color: #2c3e50;
     margin-top: 0;
 }

 .btn {
     display: inline-block;
     background: #3498db;
     color: white;
     padding: 10px 20px;
     border-radius: 5px;
     text-decoration: none;
     transition: background 0.3s ease;
 }

 .btn:hover {
     background: #2980b9;
 }