body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  margin: 0;
  padding: 0;
  color: #333;
  line-height: 1.6;
  background: #f8f9fa;
}

header, section, footer {
  max-width: 800px;
  margin: 40px auto;
  padding: 0 20px;
}

header {
  text-align: center;
  background: white;
  border-radius: 12px;
  padding: 40px 20px;
  box-shadow: 0 2px 20px rgba(0,0,0,0.1);
  margin-bottom: 40px;
}

header h1 {
  font-size: 2.5em;
  margin-bottom: 16px;
  color: #2d3748;
}

.hero-subtitle {
  font-size: 1.2em;
  margin-bottom: 24px;
  color: #4a5568;
}

.benefits {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin: 24px 0;
  flex-wrap: wrap;
}

.benefit {
  color: #38a169;
  font-weight: 600;
  font-size: 0.9em;
}

.btn {
  display: inline-block;
  background: #4e73df;
  color: #fff;
  padding: 16px 32px;
  text-decoration: none;
  border-radius: 8px;
  margin: 20px 0;
  font-size: 1.1em;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn:hover {
  background: #3b59c0;
  transform: translateY(-2px);
}

.install-note {
  font-size: 0.9em;
  color: #666;
  margin-top: 12px;
}

section {
  background: white;
  border-radius: 12px;
  padding: 32px;
  margin-bottom: 32px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

section h2 {
  color: #2d3748;
  margin-bottom: 24px;
  font-size: 1.8em;
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.step {
  text-align: center;
  padding: 24px;
  border-radius: 8px;
  background: #f7fafc;
}

.step h3 {
  color: #4e73df;
  margin-bottom: 12px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.feature {
  padding: 24px;
  border-radius: 8px;
  background: #f7fafc;
  border-left: 4px solid #4e73df;
}

.feature h3 {
  color: #2d3748;
  margin-bottom: 12px;
  font-size: 1.1em;
}

.faq-item {
  margin-bottom: 24px;
  padding: 20px;
  border-radius: 8px;
  background: #f7fafc;
}

.faq-item h3 {
  color: #2d3748;
  margin-bottom: 12px;
  font-size: 1.1em;
}

.faq-item p {
  margin: 0;
  color: #4a5568;
}

ul {
  list-style-type: disc;
  margin-left: 20px;
}

footer {
  text-align: center;
  font-size: 0.9em;
  color: #777;
  border-top: 1px solid #eee;
  padding-top: 20px;
  margin-top: 40px;
  background: white;
  border-radius: 12px;
}

@media (max-width: 768px) {
  .benefits {
    flex-direction: column;
    align-items: center;
  }
  
  .steps {
    grid-template-columns: 1fr;
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
  }
  
  header h1 {
    font-size: 2em;
  }
}