.thong-so {
  background-color: #f9f9f9;
  border: 2px solid #0099cc;
  border-radius: 8px;
  padding: 20px;
  margin-top: 20px;
  font-family: 'Arial', sans-serif;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  text-align: left;
}

.thong-so h3 {
  color: #006699;
  font-size: 22px;
  margin-bottom: 15px;
  border-left: 4px solid #0099cc;
  padding-left: 10px;
}

.thong-so ul {
  list-style: none;
  padding-left: 0;
}

.thong-so li {
  margin-bottom: 10px;
  font-size: 16px;
  color: #333;
}

.thong-so strong {
  color: #000;
  width: 130px;
  display: inline-block;
}