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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: #1a1a1a;
  line-height: 1.6;
  background: #ffffff;
}

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

.nav {
  background: #ffffff;
  border-bottom: 1px solid #e5e5e5;
  padding: 20px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 18px;
  font-weight: 600;
  color: #0066cc;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  color: #666;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: #0066cc;
}

.hero {
  padding: 80px 0;
  background: linear-gradient(135deg, #f8fbff 0%, #ffffff 100%);
}

.hero-content {
  max-width: 600px;
  margin-bottom: 48px;
}

.hero h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
  color: #1a1a1a;
}

.hero-subtitle {
  font-size: 20px;
  color: #666;
  margin-bottom: 32px;
}

.btn-primary {
  display: inline-block;
  background: #0066cc;
  color: #ffffff;
  padding: 14px 32px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s;
  box-shadow: 0 2px 8px rgba(0, 102, 204, 0.2);
}

.btn-primary:hover {
  background: #0052a3;
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
  transform: translateY(-2px);
}

.btn-secondary {
  display: inline-block;
  background: #ffffff;
  color: #0066cc;
  padding: 14px 32px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  border: 2px solid #0066cc;
  transition: all 0.3s;
}

.btn-secondary:hover {
  background: #f8fbff;
  transform: translateY(-2px);
}

.hero-image {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.hero-image img {
  width: 100%;
  display: block;
}

.features {
  padding: 100px 0;
  background: #ffffff;
}

.features h2 {
  font-size: 36px;
  text-align: center;
  margin-bottom: 60px;
  color: #1a1a1a;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

.feature-card {
  background: #f8fbff;
  padding: 32px;
  border-radius: 12px;
  transition: all 0.3s;
}

.feature-card:hover {
  box-shadow: 0 8px 24px rgba(0, 102, 204, 0.1);
  transform: translateY(-4px);
}

.feature-card h3 {
  font-size: 22px;
  margin-bottom: 12px;
  color: #1a1a1a;
}

.feature-card p {
  color: #666;
  margin-bottom: 20px;
  font-size: 15px;
}

.feature-card img {
  width: 100%;
  border-radius: 8px;
  margin-top: 16px;
}

.platform-overview {
  padding: 100px 0;
  background: #f8fbff;
}

.overview-content {
  max-width: 500px;
  margin-bottom: 48px;
}

.overview-content h2 {
  font-size: 36px;
  margin-bottom: 24px;
  color: #1a1a1a;
}

.feature-list {
  list-style: none;
  margin-bottom: 32px;
}

.feature-list li {
  padding: 12px 0;
  padding-left: 28px;
  position: relative;
  color: #666;
  font-size: 16px;
}

.feature-list li:before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #00c48c;
  font-weight: 700;
}

.overview-image {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.overview-image img {
  width: 100%;
  display: block;
}

.dashboard-hero {
  padding: 60px 0 40px;
  background: #f8fbff;
  border-bottom: 1px solid #e5e5e5;
}

.dashboard-hero h1 {
  font-size: 40px;
  margin-bottom: 8px;
  color: #1a1a1a;
}

.breadcrumb {
  color: #666;
  font-size: 14px;
}

.breadcrumb a {
  color: #0066cc;
  text-decoration: none;
}

.dashboard-content {
  padding: 60px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-bottom: 60px;
}

.stat-card {
  background: #ffffff;
  padding: 24px;
  border-radius: 12px;
  border: 1px solid #e5e5e5;
  transition: all 0.3s;
}

.stat-card:hover {
  border-color: #0066cc;
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.1);
}

.stat-label {
  font-size: 13px;
  color: #666;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.stat-value {
  font-size: 36px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 8px;
}

.stat-change {
  font-size: 14px;
  font-weight: 500;
}

.stat-change.positive {
  color: #00c48c;
}

.stat-change.neutral {
  color: #ff9500;
}

.dashboard-main {
  margin-bottom: 80px;
}

.dashboard-screenshot {
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.dashboard-features h2 {
  font-size: 32px;
  margin-bottom: 40px;
  color: #1a1a1a;
}

.feature-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  margin-bottom: 48px;
}

.feature-item h3 {
  font-size: 20px;
  margin-bottom: 12px;
  color: #1a1a1a;
}

.feature-item p {
  color: #666;
  font-size: 15px;
  line-height: 1.7;
}

.feature-visual {
  width: 100%;
  border-radius: 12px;
  margin-bottom: 48px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.analytics-content {
  padding: 60px 0;
}

.analytics-intro {
  max-width: 700px;
  margin-bottom: 48px;
}

.analytics-intro h2 {
  font-size: 32px;
  margin-bottom: 16px;
  color: #1a1a1a;
}

.analytics-intro p {
  font-size: 18px;
  color: #666;
  line-height: 1.7;
}

.analytics-visual {
  margin-bottom: 80px;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.analytics-visual img {
  width: 100%;
  display: block;
}

.metrics-section {
  margin-bottom: 80px;
}

.metrics-section h2 {
  font-size: 32px;
  margin-bottom: 40px;
  color: #1a1a1a;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.metric-card {
  background: #f8fbff;
  padding: 32px;
  border-radius: 12px;
  border: 2px solid transparent;
  transition: all 0.3s;
}

.metric-card:hover {
  border-color: #0066cc;
  box-shadow: 0 8px 24px rgba(0, 102, 204, 0.1);
}

.metric-header {
  font-size: 14px;
  color: #666;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.metric-number {
  font-size: 48px;
  font-weight: 700;
  color: #0066cc;
  margin-bottom: 16px;
}

.metric-card p {
  color: #666;
  font-size: 15px;
  line-height: 1.6;
}

.analytics-detail {
  margin-bottom: 80px;
}

.analytics-detail h2 {
  font-size: 32px;
  margin-bottom: 32px;
  color: #1a1a1a;
}

.detail-image {
  width: 100%;
  border-radius: 12px;
  margin-bottom: 40px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.analysis-points {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.point h3 {
  font-size: 20px;
  margin-bottom: 12px;
  color: #1a1a1a;
}

.point p {
  color: #666;
  font-size: 15px;
  line-height: 1.7;
}

.cta-section {
  text-align: center;
  background: linear-gradient(135deg, #0066cc 0%, #0052a3 100%);
  padding: 60px 40px;
  border-radius: 16px;
  color: #ffffff;
}

.cta-section h2 {
  font-size: 32px;
  margin-bottom: 16px;
  color: #ffffff;
}

.cta-section p {
  font-size: 18px;
  margin-bottom: 32px;
  opacity: 0.9;
}

.cta-section .btn-primary {
  background: #ffffff;
  color: #0066cc;
}

.cta-section .btn-primary:hover {
  background: #f8fbff;
}

.footer {
  background: #1a1a1a;
  color: #ffffff;
  padding: 40px 0;
  text-align: center;
}

.footer p {
  margin-bottom: 8px;
  opacity: 0.8;
}

.footer-note {
  font-size: 14px;
  opacity: 0.6;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 36px;
  }
  .hero-subtitle {
    font-size: 18px;
  }
  .nav-links {
    gap: 20px;
  }
  .features h2,
  .overview-content h2,
  .dashboard-features h2,
  .analytics-intro h2 {
    font-size: 28px;
  }
  .stat-value {
    font-size: 28px;
  }
  .metric-number {
    font-size: 36px;
  }
}