body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 20px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}
h1 {
  text-align: center;
  color: #333;
}
h2 {
  color: #444;
  margin-top: 20px;
}
p,
li {
  color: #555;
}
ul {
  list-style-type: disc;
  margin-left: 20px;
}
a {
  color: #0066cc;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
.section {
  margin-bottom: 20px;
}
.toc {
  background: #f5f5f5;
  border-radius: 8px;
  padding: 10px 20px;
}
.app-section {
  border-top: 2px solid #ddd;
  margin-top: 30px;
}
.notice {
  background: #fff8e1;
  border-left: 4px solid #f9a825;
  padding: 5px 15px;
}
.email-link {
  display: inline-block;
  background-color: #007bff;
  color: #fff;
  padding: 10px 20px;
  border-radius: 5px;
}
.email-link:hover {
  background-color: #0056b3;
  text-decoration: none;
}
.footer {
  text-align: center;
  margin-top: 40px;
  font-size: 0.9em;
  color: #777;
}
.footer a {
  margin: 0 10px;
}