* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; color: #333; line-height: 1.6; }
.container { max-width: 1000px; margin: 0 auto; padding: 0 20px; }

/* Navbar */
.navbar { position: fixed; top: 0; left: 0; right: 0; background: #fff; box-shadow: 0 2px 8px rgba(0,0,0,0.08); z-index: 1000; }
.nav-container { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.nav-logo { font-size: 1.4rem; font-weight: 700; color: #667eea; text-decoration: none; }
.nav-menu { display: flex; list-style: none; gap: 28px; }
.nav-menu a { text-decoration: none; color: #555; font-size: 0.95rem; font-weight: 500; transition: color 0.2s; }
.nav-menu a:hover { color: #667eea; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-toggle span { display: block; width: 24px; height: 3px; background: #333; margin: 4px 0; border-radius: 2px; transition: 0.3s; }

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-menu { display: none; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0; background: #fff; padding: 16px 20px; box-shadow: 0 4px 12px rgba(0,0,0,0.1); gap: 0; }
  .nav-menu.open { display: flex; }
  .nav-menu li { padding: 12px 0; border-bottom: 1px solid #f0f0f0; }
  .nav-menu li:last-child { border-bottom: none; }
}

/* Hero */
.hero { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: #fff; padding: 160px 0 100px; text-align: center; }
.hero h1 { font-size: 3rem; margin-bottom: 16px; letter-spacing: -1px; }
.hero p { font-size: 1.3rem; opacity: 0.9; margin-bottom: 36px; line-height: 1.8; }
.hero .cta { display: inline-block; background: #fff; color: #764ba2; padding: 16px 36px; border-radius: 8px; text-decoration: none; font-weight: 700; font-size: 1.1rem; transition: transform 0.2s; }
.hero .cta:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.2); }

/* Stats */
.stats { padding: 40px 0; background: #f8f9fa; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.stat-item strong { display: block; font-size: 2rem; color: #667eea; }
.stat-item span { font-size: 0.9rem; color: #666; }

/* Features */
.features { padding: 80px 0; text-align: center; }
.features h2 { font-size: 2rem; margin-bottom: 48px; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; text-align: left; }
.feature-card { padding: 30px; border-radius: 12px; background: #f8f9fa; }
.feature-icon { font-size: 2rem; margin-bottom: 12px; }
.feature-card h3 { margin-bottom: 8px; color: #333; }
.feature-card p { color: #666; font-size: 0.95rem; }

/* Use Cases */
.usecases { padding: 80px 0; background: #f8f9fa; text-align: center; }
.usecases h2 { font-size: 2rem; margin-bottom: 48px; }
.usecase-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }
.usecase-card { padding: 28px; border-radius: 12px; background: #fff; box-shadow: 0 2px 8px rgba(0,0,0,0.06); text-align: left; }
.usecase-card h3 { margin-bottom: 8px; font-size: 1.1rem; }
.usecase-card p { color: #666; font-size: 0.9rem; }

/* Comparison */
.comparison { padding: 80px 0; text-align: center; }
.comparison h2 { font-size: 2rem; margin-bottom: 36px; }
.compare-table { width: 100%; border-collapse: collapse; text-align: left; }
.compare-table th { background: #667eea; color: #fff; padding: 12px 16px; }
.compare-table td { padding: 12px 16px; border-bottom: 1px solid #eee; }
.compare-table td.yes { color: #667eea; font-weight: 600; }
.compare-table tr:hover { background: #f8f9fa; }

/* Pricing */
.pricing { padding: 80px 0; background: #f8f9fa; text-align: center; }
.pricing h2 { font-size: 2rem; margin-bottom: 12px; }
.pricing-sub { color: #666; margin-bottom: 40px; }
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.price-card { position: relative; padding: 36px 24px; border-radius: 12px; background: #fff; border: 2px solid #eee; }
.price-card.popular { border-color: #667eea; box-shadow: 0 4px 20px rgba(102,126,234,0.15); }
.price-card .badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: #667eea; color: #fff; padding: 4px 16px; border-radius: 20px; font-size: 0.8rem; font-weight: 600; }
.price-card h3 { font-size: 1.2rem; color: #666; margin-bottom: 12px; }
.price-card .price { font-size: 2rem; font-weight: 700; color: #333; margin-bottom: 20px; }
.price-card .price span { font-size: 0.9rem; font-weight: 400; color: #999; }
.price-card ul { list-style: none; margin-bottom: 24px; }
.price-card ul li { padding: 8px 0; color: #555; border-bottom: 1px solid #f0f0f0; }
.price-btn { display: inline-block; padding: 12px 28px; background: #667eea; color: #fff; border-radius: 6px; text-decoration: none; font-weight: 600; }
.price-btn:hover { background: #5a6fd6; }

/* Register */
.register { padding: 80px 0; }
.register h2 { text-align: center; font-size: 1.8rem; margin-bottom: 32px; }
.form-box { max-width: 400px; margin: 0 auto; background: #fff; padding: 32px; border-radius: 12px; box-shadow: 0 2px 12px rgba(0,0,0,0.08); }
.form-box input { width: 100%; padding: 12px; margin-bottom: 16px; border: 1px solid #ddd; border-radius: 6px; font-size: 1rem; }
.form-box button { width: 100%; padding: 14px; background: #667eea; color: #fff; border: none; border-radius: 6px; font-size: 1rem; font-weight: 600; cursor: pointer; }
.form-box button:hover { background: #5a6fd6; }
.form-msg { text-align: center; margin-top: 12px; font-size: 0.9rem; }
.form-msg.ok { color: #28a745; }
.form-msg.err { color: #dc3545; }

/* Download */
.download { padding: 80px 0; text-align: center; background: #f8f9fa; }
.download h2 { font-size: 1.8rem; margin-bottom: 16px; }
.download p { margin-bottom: 24px; color: #666; }
.dl-btn { display: inline-block; background: #28a745; color: #fff; padding: 16px 36px; border-radius: 8px; text-decoration: none; font-weight: 700; font-size: 1.1rem; }
.dl-btn:hover { background: #218838; }
.dl-note { margin-top: 16px; font-size: 0.8rem; color: #999; }

/* Footer */
footer { padding: 30px 0; text-align: center; color: #999; font-size: 0.85rem; border-top: 1px solid #eee; }

/* Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .compare-table { font-size: 0.85rem; }
  .compare-table th, .compare-table td { padding: 8px; }
}


/* How it works */
.how-it-works { padding: 80px 0; text-align: center; }
.how-it-works h2 { font-size: 2rem; margin-bottom: 48px; }
.steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; }
.step-card { padding: 30px; border-radius: 12px; background: #f8f9fa; text-align: center; }
.step-num { width: 40px; height: 40px; line-height: 40px; border-radius: 50%; background: #667eea; color: #fff; font-weight: 700; margin: 0 auto 16px; }
.step-card h3 { margin-bottom: 8px; }
.step-card p { color: #666; font-size: 0.95rem; }

/* Detail section */
.detail-section { padding: 80px 0; background: #f8f9fa; }
.detail-section h2 { text-align: center; font-size: 2rem; margin-bottom: 48px; }
.detail-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.detail-item { padding: 28px; border-radius: 12px; background: #fff; box-shadow: 0 2px 8px rgba(0,0,0,0.06); }
.detail-item h3 { margin-bottom: 10px; font-size: 1.1rem; }
.detail-item p { color: #666; font-size: 0.9rem; line-height: 1.7; }

/* FAQ */
.faq { padding: 80px 0; }
.faq h2 { text-align: center; font-size: 2rem; margin-bottom: 48px; }
.faq-list { max-width: 700px; margin: 0 auto; }
.faq-item { margin-bottom: 24px; padding: 24px; border-radius: 12px; background: #f8f9fa; }
.faq-item h3 { font-size: 1rem; margin-bottom: 10px; color: #333; }
.faq-item p { color: #666; font-size: 0.9rem; line-height: 1.7; }