/* ==========================================================================
   FlyBit Site 1 (flybit.best) - Enterprise Flagship Light Theme
   Colors: #1473FB (Electric Blue), #FB841B (Vibrant Orange), #FFFFFF, #0F172A
   ========================================================================== */

:root {
  --primary: #1473FB;
  --primary-hover: #0b5ed7;
  --primary-light: #EBF3FF;
  --secondary: #FB841B;
  --secondary-hover: #e06d0b;
  --bg-page: #FFFFFF;
  --bg-subtle: #F8FAFC;
  --bg-card: #FFFFFF;
  --border-color: #E2E8F0;
  --border-light: #F1F5F9;
  --text-main: #0F172A;
  --text-muted: #64748B;
  --text-dim: #94A3B8;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 12px rgba(20, 115, 251, 0.08);
  --shadow-lg: 0 12px 30px rgba(15, 23, 42, 0.08);
  --radius: 12px;
  --transition: all 0.25s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; vertical-align: middle; }
.container { max-width: 1240px; margin: 0 auto; padding: 0 24px; }

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
}
.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
}
.brand-link .logo-img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}
.brand-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 8px;
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  color: #fff;
  border-radius: 999px;
  letter-spacing: 0.5px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}
.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
}
.nav-links a:hover, .nav-links a.active {
  color: var(--primary);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--primary);
  color: #fff !important;
  box-shadow: 0 4px 14px rgba(20, 115, 251, 0.3);
}
.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(20, 115, 251, 0.4);
}
.btn-secondary {
  background: var(--secondary);
  color: #fff !important;
}
.btn-secondary:hover {
  background: var(--secondary-hover);
  transform: translateY(-2px);
}
.btn-outline {
  border-color: var(--border-color);
  background: #fff;
  color: var(--text-main) !important;
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary) !important;
  background: var(--primary-light);
}

/* Hero */
.hero-section {
  padding: 70px 0 60px;
  background: radial-gradient(circle at 10% 20%, rgba(20, 115, 251, 0.05) 0%, transparent 40%),
              radial-gradient(circle at 90% 80%, rgba(251, 132, 27, 0.05) 0%, transparent 40%),
              #FFFFFF;
  border-bottom: 1px solid var(--border-light);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 999px;
  font-size: 0.84rem;
  font-weight: 700;
  margin-bottom: 20px;
}
.hero-title {
  font-size: 2.85rem;
  font-weight: 800;
  line-height: 1.22;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.hero-title span.highlight {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-desc {
  font-size: 1.12rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-trust {
  margin-top: 32px;
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--text-dim);
  font-size: 0.85rem;
}
.hero-trust i { color: #10B981; }

/* Radar Mockup Card */
.radar-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.radar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 18px;
}
.radar-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}
.status-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: #ECFDF5;
  color: #059669;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
}
.status-dot {
  width: 8px;
  height: 8px;
  background: #10B981;
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
}
.node-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg-subtle);
  border-radius: 8px;
  font-size: 0.88rem;
  border: 1px solid transparent;
  transition: var(--transition);
}
.node-item:hover {
  border-color: var(--border-color);
  background: #fff;
}
.node-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}
.node-metrics {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: monospace;
}
.latency { color: #059669; font-weight: 700; }
.loss { color: var(--text-muted); font-size: 0.8rem; }

/* Stats Bar */
.stats-section {
  background: var(--bg-subtle);
  padding: 30px 0;
  border-bottom: 1px solid var(--border-light);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
  margin-bottom: 4px;
}
.stat-label {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Common Section */
.section { padding: 80px 0; }
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px;
}
.section-badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.25;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Feature Grid */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(20, 115, 251, 0.3);
}
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
}
.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}
.feature-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}
.price-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 36px 30px;
  position: relative;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.price-card.featured {
  border-color: var(--primary);
  box-shadow: 0 8px 30px rgba(20, 115, 251, 0.15);
  transform: scale(1.03);
}
.popular-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  padding: 4px 16px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.plan-name { font-size: 1.35rem; font-weight: 800; color: var(--text-main); margin-bottom: 6px; }
.plan-desc { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 20px; }
.plan-price { font-size: 2.5rem; font-weight: 800; color: var(--primary); line-height: 1; margin-bottom: 24px; }
.plan-price span { font-size: 0.95rem; font-weight: 500; color: var(--text-muted); }
.plan-features { list-style: none; margin-bottom: 30px; flex-grow: 1; }
.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-main);
  padding: 8px 0;
  border-bottom: 1px solid var(--border-light);
}
.plan-features li i { color: #10B981; }

/* Speed Comparison Table */
.table-wrap {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.comp-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}
.comp-table th, .comp-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.92rem;
}
.comp-table th {
  background: var(--bg-subtle);
  font-weight: 700;
  color: var(--text-main);
}
.comp-table tr:last-child td { border-bottom: none; }
.comp-table .hl { color: var(--primary); font-weight: 700; }

/* FAQ Section */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.faq-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
}
.faq-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.faq-card h4 i { color: var(--primary); }
.faq-card p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Call to Action Banner */
.cta-banner {
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
  color: #FFFFFF;
  border-radius: 20px;
  padding: 60px 40px;
  text-align: center;
  box-shadow: var(--shadow-lg);
}
.cta-banner h2 { font-size: 2.2rem; font-weight: 800; margin-bottom: 14px; }
.cta-banner p { font-size: 1.1rem; color: #94A3B8; max-width: 680px; margin: 0 auto 30px; }

/* Ecosystem Matrix Footer */
.ecosystem-matrix-bar {
  background: #F1F5F9;
  border-top: 1px solid var(--border-color);
  padding: 24px 0;
}
.eco-container { max-width: 1240px; margin: 0 auto; padding: 0 24px; }
.eco-header {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.eco-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.eco-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 0.82rem;
  color: var(--text-main);
  font-weight: 500;
  transition: var(--transition);
}
.eco-link:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}
.eco-link.current {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
  font-weight: 700;
}

/* Footer */
footer {
  background: #FFFFFF;
  border-top: 1px solid var(--border-color);
  padding: 40px 0 24px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.footer-links {
  display: flex;
  gap: 20px;
}
.footer-links a:hover { color: var(--primary); }

/* Subpage Layout */
.subpage-hero {
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border-color);
  padding: 50px 0;
  text-align: center;
}
.subpage-hero h1 {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
}
.subpage-hero p {
  font-size: 1.05rem;
  color: var(--text-muted);
}
.subpage-content {
  padding: 60px 0;
  max-width: 900px;
  margin: 0 auto;
  line-height: 1.8;
  color: #334155;
}
.subpage-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 30px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary-light);
}
.subpage-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-main);
  margin: 22px 0 10px;
}
.subpage-content p { margin-bottom: 16px; }
.subpage-content ul, .subpage-content ol {
  margin: 0 0 20px 24px;
}
.subpage-content li { margin-bottom: 8px; }

/* Responsive */
@media (max-width: 992px) {
  .hero-grid { grid-template-columns: 1fr; }
  .grid-3, .pricing-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .faq-grid { grid-template-columns: 1fr; }
  .price-card.featured { transform: none; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero-title { font-size: 2.1rem; }
  .footer-inner { flex-direction: column; gap: 16px; text-align: center; }
}