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

:root {
  --primary: #667eea;
  --primary-dark: #5568d3;
  --secondary: #764ba2;
  --accent: #10b981;
  --dark: #1a202c;
  --gray: #4a5568;
  --light-gray: #e2e8f0;
  --bg: #ffffff;
  --bg-alt: #f7fafc;
  --text: #2d3748;
  --text-light: #718096;
  --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.15);
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.header {
  background: var(--bg);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 0;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark);
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-sub {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--primary);
}

.nav {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  transition: color 0.3s;
}

.nav-link:hover {
  color: var(--primary);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s;
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn-primary {
  background: var(--gradient);
  color: white;
}

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

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-secondary:hover {
  background: var(--primary);
  color: white;
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

.btn-device {
  width: 100%;
  background: var(--primary);
  color: white;
}

.btn-device:hover {
  background: var(--primary-dark);
}

.btn-pricing {
  width: 100%;
  background: var(--primary);
  color: white;
}

.btn-pricing:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.btn-cta {
  background: var(--accent);
  color: white;
  font-size: 1.2rem;
}

.btn-cta:hover {
  background: #059669;
  transform: translateY(-2px);
}

/* Hero Section */
.hero {
  padding: 80px 0;
  background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--dark);
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-light);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

.hero-features {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.feature-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  color: var(--text);
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
}

/* Device Selection */
.devices {
  padding: 80px 0;
  background: var(--bg);
}

.device-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.device-card {
  background: var(--bg-alt);
  padding: 3rem 2rem;
  border-radius: 16px;
  text-align: center;
  transition: all 0.3s;
  border: 2px solid var(--light-gray);
}

.device-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
  border-color: var(--primary);
}

.device-icon {
  margin-bottom: 1.5rem;
}

.device-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--dark);
}

.device-desc {
  color: var(--text-light);
  margin-bottom: 1.5rem;
}

/* Problem Section */
.problem {
  padding: 80px 0;
  background: var(--bg-alt);
}

.problem-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 3rem;
  align-items: start;
}

.problem-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-top: 2rem;
}

.problem-item {
  display: flex;
  gap: 1.5rem;
  align-items: start;
}

.problem-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.problem-item h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--dark);
}

.problem-item p {
  color: var(--text-light);
}

.solution-box {
  background: white;
  padding: 2.5rem;
  border-radius: 16px;
  box-shadow: var(--shadow);
  position: sticky;
  top: 100px;
}

.solution-box h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--dark);
}

.solution-box p {
  color: var(--text-light);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

/* Section Titles */
.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 1rem;
}

.section-title.center {
  text-align: center;
}

.section-subtitle {
  text-align: center;
  font-size: 1.2rem;
  color: var(--text-light);
  margin-bottom: 3rem;
}

/* Benefits Section */
.benefits {
  padding: 80px 0;
  background: var(--bg);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.benefit-card {
  background: var(--bg-alt);
  padding: 2rem;
  border-radius: 16px;
  transition: all 0.3s;
  border: 2px solid transparent;
}

.benefit-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
  border-color: var(--primary);
}

.benefit-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.benefit-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--dark);
}

.benefit-card p {
  color: var(--text-light);
  line-height: 1.6;
}

/* Instruction Section */
.instruction {
  padding: 80px 0;
  background: var(--bg-alt);
}

.steps {
  display: flex;
  gap: 3rem;
  margin-top: 3rem;
  justify-content: center;
}

.step {
  flex: 1;
  max-width: 350px;
  text-align: center;
}

.step-number {
  width: 80px;
  height: 80px;
  background: var(--gradient);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  margin: 0 auto 1.5rem;
}

.step-content h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--dark);
}

.step-content p {
  color: var(--text-light);
  line-height: 1.6;
}

/* Secondary CTA */
.cta-secondary {
  padding: 80px 0;
  background: var(--bg);
}

.cta-box {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 4rem;
  border-radius: 24px;
  text-align: center;
  color: white;
}

.cta-box h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.cta-desc {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

.cta-features {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

/* Pricing Section */
.pricing {
  padding: 80px 0;
  background: var(--bg-alt);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.pricing-card {
  background: white;
  padding: 2.5rem;
  border-radius: 16px;
  box-shadow: var(--shadow);
  transition: all 0.3s;
  position: relative;
  border: 3px solid transparent;
}

.pricing-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
  border-color: var(--primary);
  transform: scale(1.05);
}

.pricing-card.featured:hover {
  transform: scale(1.08);
}

.badge {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: white;
  padding: 0.5rem 1.5rem;
  border-radius: 20px;
  font-weight: 700;
  font-size: 0.9rem;
}

.badge.discount {
  background: var(--primary);
}

.pricing-header h3 {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  color: var(--dark);
  margin-bottom: 1.5rem;
}

.pricing-price {
  text-align: center;
  margin-bottom: 2rem;
}

.price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary);
  display: block;
}

.period {
  font-size: 1rem;
  color: var(--text-light);
  display: block;
}

.discount {
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 600;
  display: block;
  margin-top: 0.5rem;
}

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
}

.pricing-features li {
  padding: 0.75rem 0;
  color: var(--text);
  border-bottom: 1px solid var(--light-gray);
}

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

/* SEO Content */
.seo-content {
  padding: 80px 0;
  background: var(--bg);
}

.seo-grid {
  display: grid;
  gap: 3rem;
  margin-top: 2rem;
}

.seo-block h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 1rem;
}

.seo-block p {
  color: var(--text-light);
  line-height: 1.8;
  font-size: 1.05rem;
}

/* FAQ Section */
.faq {
  padding: 80px 0;
  background: var(--bg-alt);
}

.faq-list {
  max-width: 900px;
  margin: 3rem auto 0;
}

.faq-item {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.faq-question {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 1rem;
  cursor: pointer;
}

.faq-answer p {
  color: var(--text-light);
  line-height: 1.8;
}

/* Footer */
.footer {
  background: var(--dark);
  color: white;
  padding: 3rem 0;
}

.footer-content {
  text-align: center;
}

.footer-logo {
  margin-bottom: 2rem;
}

.footer-logo .logo {
  justify-content: center;
  margin-bottom: 1rem;
}

.footer-logo .logo-text {
  color: white;
}

.footer-logo p {
  color: rgba(255, 255, 255, 0.7);
}

.footer-info p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.95rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .hero-content,
  .problem-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .benefits-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .pricing-card.featured {
    transform: scale(1);
  }

  .steps {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 768px) {
  .header-content {
    flex-wrap: wrap;
  }

  .nav {
    order: 3;
    width: 100%;
    justify-content: center;
    gap: 1rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .hero-cta {
    flex-direction: column;
  }

  .section-title {
    font-size: 2rem;
  }

  .benefits-grid,
  .device-grid {
    grid-template-columns: 1fr;
  }

  .cta-box {
    padding: 2rem;
  }

  .cta-box h2 {
    font-size: 1.75rem;
  }

  .cta-features {
    flex-direction: column;
    gap: 1rem;
  }

  .solution-box {
    position: static;
  }
}