:root {
  --primary: #0f766e;
  --primary-dark: #0d5c57;
  --secondary: #0891b2;
  --accent: #06b6d4;
  --text: #18181b;
  --text-light: #52525b;
  --text-muted: #a1a1aa;
  --bg: #ffffff;
  --bg-gray: #fafafa;
  --border: #e4e4e7;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 4px 8px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 24px rgba(0,0,0,0.08);
  --shadow-xl: 0 24px 48px rgba(0,0,0,0.1);
  --radius: 8px;
  --radius-lg: 10px;
  --radius-xl: 12px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navbar */
.navbar {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: #18181b;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 1.2rem;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 8px;
}

.nav-links a {
  padding: 8px 16px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-light);
  font-weight: 500;
  transition: all 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
  background: rgba(16, 185, 129, 0.08);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-switch {
  display: flex;
  background: var(--bg-gray);
  border-radius: 8px;
  padding: 2px;
}

.lang-switch a {
  padding: 6px 12px;
  border-radius: 6px;
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
}

.lang-switch a.active {
  background: white;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.btn-download-nav {
  background: #18181b;
  color: white;
  padding: 10px 20px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s;
}

.btn-download-nav:hover {
  background: #27272a;
  transform: translateY(-1px);
}

.btn-download-nav:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  padding: 80px 0 100px;
  background: #ffffff;
  position: relative;
  overflow: hidden;
}

.hero-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #f8fafc;
  border: 1px solid var(--border);
  padding: 10px 22px;
  border-radius: 50px;
  font-size: 0.9rem;
  color: var(--text);
  font-weight: 500;
  margin-bottom: 32px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--text) 0%, var(--primary) 50%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-light);
  max-width: 650px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 1.05rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  border: 2px solid var(--border);
  background: white;
  color: var(--text);
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-primary {
  background: #18181b;
  color: white;
  border-color: #18181b;
}

.btn-primary:hover {
  background: #27272a;
  border-color: #27272a;
}

.btn-secondary {
  background: linear-gradient(135deg, var(--secondary), #ea580c);
  color: white;
  border-color: transparent;
}

.hero-note {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.hero-note span {
  margin: 0 12px;
  color: var(--border);
}

/* Stats */
.stats {
  padding: 60px 0;
  background: white;
  border-bottom: 1px solid var(--border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 8px;
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
}

/* Section */
.section {
  padding: 80px 0;
}

.section.bg-gray {
  background: var(--bg-gray);
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-block;
  background: #fafafa;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.3s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: #fafafa;
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}

.feature-card p {
  color: var(--text-light);
  line-height: 1.7;
}

/* Download Cards */
.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.download-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  transition: all 0.3s;
}

.download-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary);
}

.download-icon {
  width: 72px;
  height: 72px;
  background: #fafafa;
  border: 1px solid var(--border);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 20px;
}

.download-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.download-meta {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 20px;
}

.download-btn {
  width: 100%;
  justify-content: center;
}

.download-alt {
  margin-top: 12px;
  font-size: 0.875rem;
}

.download-alt a {
  color: var(--primary);
  text-decoration: none;
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.pricing-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  transition: all 0.3s;
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.pricing-card.popular {
  border-color: var(--primary);
  border-width: 2px;
  transform: scale(1.05);
}

.pricing-card.popular:hover {
  transform: scale(1.05) translateY(-4px);
}

.badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
}

.pricing-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.pricing-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.pricing-price {
  margin-bottom: 8px;
}

.pricing-price .num {
  font-size: 3rem;
  font-weight: 800;
}

.pricing-price .unit {
  color: var(--text-muted);
  font-size: 1rem;
}

.pricing-price .original {
  color: var(--text-muted);
  text-decoration: line-through;
  font-size: 1rem;
  margin-left: 8px;
}

.pricing-price .save {
  background: #fee2e2;
  color: #dc2626;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-left: 8px;
}

.pricing-features {
  margin: 32px 0;
  list-style: none;
}

.pricing-features li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-light);
}

.pricing-features li:last-child {
  border-bottom: none;
}

/* FAQ */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  background: white;
}

.faq-q {
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  transition: all 0.2s;
}

.faq-q:hover {
  background: var(--bg-gray);
}

.faq-q .arrow {
  color: var(--text-muted);
  transition: transform 0.2s;
}

.faq-item.open .faq-q .arrow {
  transform: rotate(180deg);
}

.faq-a {
  padding: 0 24px 20px;
  color: var(--text-light);
  line-height: 1.8;
  display: none;
}

.faq-item.open .faq-a {
  display: block;
}

/* CTA */
.cta-section {
  text-align: center;
  padding: 60px 40px;
  background: #fafafa;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  color: var(--text);
}

.cta-section h2 {
  font-size: 2rem;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 32px;
}

.cta-section .btn {
  background: white;
  color: var(--primary-dark);
  border-color: white;
}

/* Footer */
.footer {
  padding: 60px 0 32px;
  background: #fafafa;
  border-top: 1px solid var(--border);
  color: var(--text-light);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand {
  color: var(--text);
}

.footer-brand h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  margin-bottom: 16px;
}

.footer-brand p {
  line-height: 1.8;
  opacity: 0.8;
}

.footer-column h4 {
  color: var(--text);
  margin-bottom: 20px;
  font-size: 1rem;
}

.footer-column ul {
  list-style: none;
}

.footer-column li {
  margin-bottom: 12px;
}

.footer-column a {
  color: var(--text-light);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-column a:hover {
  color: var(--primary);
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.9rem;
}

/* Breadcrumb */
.breadcrumb {
  margin-bottom: 32px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.breadcrumb-item a {
  color: var(--primary);
  text-decoration: none;
}

/* Page Header */
.page-header {
  padding: 60px 0;
  background: #ffffff;
  border-bottom: 1px solid var(--border);
}

.page-header-content {
  text-align: center;
}

.page-header-content h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.page-header-content p {
  font-size: 1.15rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* Responsive */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }
  .pricing-card.popular {
    transform: none;
  }
  .pricing-card.popular:hover {
    transform: translateY(-4px);
  }
  .footer-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .nav-toggle {
    display: block;
  }
  .hero-title {
    font-size: 2.25rem;
  }
  .hero-subtitle {
    font-size: 1.1rem;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .section-title {
    font-size: 1.75rem;
  }
  .features-grid,
  .download-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}