* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}
body {
  background-color: #f8f9fa;
  padding: 20px 15px;
  line-height: 1.6;
  color: #2c3e50;
}
.container {
  max-width: 960px;
  margin: 0 auto;
}
.header {
  text-align: center;
  margin-bottom: 40px;
}
.header h1 {
  font-size: 32px;
  font-weight: 700;
  color: #2c3e50;
  margin-bottom: 10px;
}
.header .lead {
  font-size: 18px;
  color: #7f8c8d;
  margin-bottom: 20px;
}
.btn-download {
  display: inline-block;
  background-color: #3498db;
  color: #fff;
  text-decoration: none;
  padding: 12px 24px;
  font-size: 18px;
  border-radius: 6px;
  transition: background 0.3s;
}
.btn-download:hover {
  background-color: #2980b9;
}
.section {
  margin-bottom: 40px;
}
.section h2 {
  font-size: 24px;
  border-left: 4px solid #3498db;
  padding-left: 12px;
  margin-bottom: 20px;
  color: #2c3e50;
}
.feature-box {
  background: #fff;
  border-radius: 6px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.feature-box h3 {
  font-size: 20px;
  color: #3498db;
  margin-bottom: 10px;
}
.step {
  background: #fff;
  padding: 15px;
  border-radius: 6px;
  margin-bottom: 10px;
  font-size: 16px;
}
.faq {
  background: #fff;
  padding: 20px;
  border-radius: 6px;
}
.faq p {
  margin-bottom: 15px;
}
.faq strong {
  color: #2c3e50;
}
.cta {
  text-align: center;
  padding: 30px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  margin-bottom: 30px;
}
.cta h2 {
  margin-bottom: 15px;
}
.cta p {
  margin-bottom: 20px;
  font-size: 16px;
}
.footer {
  text-align: center;
  color: #999;
  margin-top: 20px;
}
@media (max-width: 768px) {
  .header h1 {
    font-size: 26px;
  }
  .section h2 {
    font-size: 20px;
  }
  .feature-box h3 {
    font-size: 18px;
  }
}