/* OpenClaw 学习工坊 - 极简主义样式 */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 0;
  color: #1F2937;
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  background: white;
  min-height: 100vh;
  box-shadow: 0 0 60px rgba(0,0,0,0.3);
}

/* Header / Hero */
.header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 80px 40px 60px;
  text-align: center;
}

.hero-title {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.2;
}

.hero-line {
  display: block;
}

.hero-subtitle {
  font-size: 18px;
  opacity: 0.95;
  max-width: 700px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

/* Stats */
.stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  margin: 40px 0;
  flex-wrap: wrap;
}

.stat {
  text-align: center;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}

.stat-value {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 14px;
  opacity: 0.9;
}

/* CTA Buttons */
.cta-group {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-top: 40px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 16px 32px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: white;
  color: #667eea;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.btn-secondary {
  background: rgba(255,255,255,0.2);
  color: white;
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.3);
}

/* Content */
.content {
  padding: 60px 40px;
}

.section {
  margin-bottom: 60px;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 40px;
  text-align: center;
  color: #1F2937;
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.feature-card {
  background: #F9FAFB;
  padding: 30px;
  border-radius: 16px;
  text-align: center;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
  border-color: #667eea;
}

.feature-icon {
  font-size: 48px;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
  color: #1F2937;
}

.feature-card p {
  font-size: 14px;
  color: #6B7280;
  line-height: 1.6;
}

/* Learning Paths */
.learning-paths {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 25px;
}

.path-card {
  background: white;
  border: 2px solid #E5E7EB;
  padding: 30px;
  border-radius: 16px;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
  text-align: center;
}

.path-card:hover {
  border-color: #667eea;
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(102,126,234,0.15);
}

.path-icon {
  font-size: 40px;
  margin-bottom: 15px;
}

.path-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: #1F2937;
}

.path-card p {
  font-size: 14px;
  color: #6B7280;
}

/* Footer */
.footer {
  background: #F9FAFB;
  padding: 60px 40px;
  border-top: 1px solid #E5E7EB;
}

.footer-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.footer-content h3 {
  font-size: 24px;
  margin-bottom: 15px;
  color: #1F2937;
}

.tagline {
  font-size: 16px;
  color: #6B7280;
  margin-bottom: 20px;
  font-style: italic;
}

.description {
  font-size: 14px;
  color: #6B7280;
  line-height: 1.8;
  margin-bottom: 30px;
}

.footer-links {
  display: flex;
  gap: 30px;
  justify-content: center;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.footer-links a {
  color: #667eea;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: #764ba2;
}

.copyright {
  font-size: 12px;
  color: #9CA3AF;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-title {
    font-size: 32px;
  }
  
  .hero-subtitle {
    font-size: 16px;
  }
  
  .stats {
    gap: 30px;
  }
  
  .stat-value {
    font-size: 36px;
  }
  
  .content {
    padding: 40px 20px;
  }
  
  .section-title {
    font-size: 24px;
  }
  
  .features, .learning-paths {
    grid-template-columns: 1fr;
  }
}