/* ==========================================================================
   xxyun Airport - High-Tech Futuristic Cyber Lab Theme
   Theme: Sci-Fi Control Room & Clinical White Cyber Lab Aesthetic
   ========================================================================== */

:root {
  /* Color Palette - Sci-Fi Clinical White & Neon Cyan */
  --bg-main: #edf2f7;
  --bg-sidebar: rgba(255, 255, 255, 0.82);
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-card-hover: rgba(255, 255, 255, 0.92);
  --bg-glass: rgba(255, 255, 255, 0.8);

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-light: #94a3b8;
  --text-white: #ffffff;

  --primary: #0284c7;
  --primary-hover: #0369a1;
  --primary-light: #e0f2fe;
  --primary-glow: rgba(6, 182, 212, 0.35);

  --accent-cyan: #06b6d4;
  --accent-teal: #14b8a6;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-neon-blue: #38bdf8;

  --gradient-primary: linear-gradient(135deg, #0284c7 0%, #06b6d4 50%, #38bdf8 100%);
  --gradient-hero: linear-gradient(135deg, rgba(224, 242, 254, 0.7) 0%, rgba(240, 249, 255, 0.8) 50%, rgba(207, 250, 254, 0.7) 100%);
  --gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 0.85) 0%, rgba(240, 249, 255, 0.6) 100%);
  --gradient-neon-line: linear-gradient(90deg, transparent, rgba(6, 182, 212, 0.8), transparent);

  --border-light: rgba(203, 213, 225, 0.7);
  --border-cyber: rgba(6, 182, 212, 0.35);
  --border-focus: #38bdf8;

  --shadow-sm: 0 2px 4px 0 rgba(15, 23, 42, 0.04);
  --shadow-md: 0 8px 24px -4px rgba(6, 182, 212, 0.12), 0 4px 6px -2px rgba(15, 23, 42, 0.03);
  --shadow-lg: 0 20px 35px -10px rgba(6, 182, 212, 0.2), 0 10px 15px -5px rgba(15, 23, 42, 0.05);
  --shadow-glow: 0 0 25px rgba(6, 182, 212, 0.35);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --sidebar-width: 275px;
  --transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 75%, rgba(56, 189, 248, 0.08) 0%, transparent 40%);
  background-attachment: fixed;
}

/* Dynamic Canvas Background */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

/* Main Layout Grid */
.app-container {
  display: flex;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

/* Left Sidebar - Cyber Control Dock */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-right: 1px solid var(--border-cyber);
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.75rem 1.25rem;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.sidebar::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, transparent, var(--accent-cyan), transparent);
  opacity: 0.6;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 800;
  font-size: 1.35rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-light);
  position: relative;
}

.brand-icon {
  width: 44px;
  height: 44px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.4rem;
  box-shadow: var(--shadow-glow);
  position: relative;
  overflow: hidden;
}

.brand-icon::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255,255,255,0.4), transparent);
  transform: rotate(45deg);
  animation: shine 4s infinite;
}

@keyframes shine {
  0% { transform: translateX(-100%) rotate(45deg); }
  20%, 100% { transform: translateX(100%) rotate(45deg); }
}

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

.sidebar-nav {
  margin-top: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex-grow: 1;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.8rem 1.1rem;
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  transition: var(--transition);
  position: relative;
}

.nav-link i {
  font-size: 1.2rem;
  width: 24px;
  text-align: center;
  color: var(--text-light);
  transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background: rgba(224, 242, 254, 0.7);
  border: 1px solid var(--border-cyber);
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.1);
}

.nav-link:hover i, .nav-link.active i {
  color: var(--accent-cyan);
  transform: scale(1.1);
}

.nav-link.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20%;
  bottom: 20%;
  width: 4px;
  background: var(--accent-cyan);
  border-radius: var(--radius-full);
  box-shadow: 0 0 10px var(--accent-cyan);
}

.sidebar-cta {
  background: var(--gradient-hero);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  text-align: center;
  margin-top: 1rem;
  box-shadow: var(--shadow-sm);
}

.sidebar-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.12);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0% { transform: scale(0.9); opacity: 0.7; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.7; }
}

.btn-sidebar {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--gradient-primary);
  color: #fff;
  border: none;
  padding: 0.75rem 1rem;
  font-weight: 700;
  font-size: 0.925rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  transition: var(--transition);
}

.btn-sidebar:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(6, 182, 212, 0.4);
}

/* Mobile Header Bar */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-cyber);
  z-index: 99;
  padding: 0 1.25rem;
  align-items: center;
  justify-content: space-between;
}

.mobile-logo {
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--text-main);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.mobile-menu-btn {
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--text-main);
  cursor: pointer;
}

/* Main Content Wrapper */
.main-content {
  margin-left: var(--sidebar-width);
  flex-grow: 1;
  padding: 0;
  min-width: 0;
  transition: var(--transition);
}

/* Top Announcement Banner */
.top-announcement-bar {
  background: linear-gradient(90deg, #0284c7 0%, #06b6d4 50%, #0284c7 100%);
  background-size: 200% auto;
  color: #ffffff;
  font-weight: 600;
  font-size: 0.88rem;
  padding: 0.65rem 1.5rem;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.2);
  animation: gradient-shift 6s ease infinite;
  position: relative;
  z-index: 10;
}

@keyframes gradient-shift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.announcement-badge {
  background: rgba(255, 255, 255, 0.25);
  padding: 0.18rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  backdrop-filter: blur(4px);
}

.announcement-link {
  color: #fff;
  text-decoration: underline;
  cursor: pointer;
  font-weight: 700;
}

/* Page Inner Sections - Glassmorphic Integration with Dynamic BG */
.section-wrapper {
  padding: 4.5rem 3rem;
  max-width: 1240px;
  margin: 0 auto;
  position: relative;
}

.section-wrapper::before {
  content: "";
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: var(--gradient-neon-line);
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 740px;
  margin: 0 auto 3.5rem auto;
}

.section-tag {
  display: inline-block;
  font-size: 0.825rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.8px;
  color: var(--primary);
  background: rgba(224, 242, 254, 0.9);
  border: 1px solid var(--border-cyber);
  padding: 0.35rem 0.95rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.85rem;
  box-shadow: 0 2px 10px rgba(6, 182, 212, 0.1);
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.25;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* Hero Section */
.hero-section {
  padding: 5rem 3rem 4rem 3rem;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-cyber);
  padding: 0.45rem 1.15rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 3.1rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 1.35rem;
  color: var(--text-main);
}

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

.hero-desc {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: 2.25rem;
  line-height: 1.75;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  padding: 0.95rem 1.95rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 30px rgba(6, 182, 212, 0.45);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  color: var(--text-main);
  border: 1px solid var(--border-cyber);
  font-size: 1.05rem;
  font-weight: 700;
  padding: 0.95rem 1.95rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.2);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-light);
}

.metric-item .metric-num {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-main);
  font-family: 'Plus Jakarta Sans', monospace;
}

.metric-item .metric-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Sci-Fi Lab Control Showcase Panel */
.hero-showcase {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-lg);
  padding: 1.85rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.hero-showcase::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, transparent 50%, rgba(6, 182, 212, 0.15) 50%);
  pointer-events: none;
}

.showcase-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-light);
}

.showcase-dots {
  display: flex;
  gap: 7px;
}

.showcase-dots span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; box-shadow: 0 0 8px #10b981; }

.showcase-speed-card {
  background: var(--gradient-hero);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.speed-info h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
}

.speed-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.speed-val {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--primary);
  font-family: 'Plus Jakarta Sans', monospace;
}

/* Node Latency Monitor Section */
.status-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.node-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-md);
  padding: 1.35rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.node-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-cyan);
  background: var(--bg-card-hover);
}

.node-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.95rem;
}

.node-title {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  font-size: 1.05rem;
}

.node-flag {
  font-size: 1.25rem;
}

.node-protocol {
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid rgba(6, 182, 212, 0.2);
}

.node-metrics {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(240, 249, 255, 0.8);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
}

.latency-val {
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--accent-emerald);
  font-family: 'Plus Jakarta Sans', monospace;
}

.latency-val.amber { color: var(--accent-amber); }

.node-status-indicator {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.status-retest-bar {
  text-align: center;
  margin-top: 2.25rem;
}

/* Pricing Section */
.pricing-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  margin-bottom: 3.5rem;
}

.toggle-label {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-muted);
  cursor: pointer;
}

.toggle-label.active {
  color: var(--text-main);
}

.switch {
  position: relative;
  display: inline-block;
  width: 54px;
  height: 30px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: #cbd5e1;
  transition: .4s;
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 22px;
  width: 22px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
}

input:checked + .slider {
  background: var(--gradient-primary);
}

input:checked + .slider:before {
  transform: translateX(24px);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.85rem;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-7px);
  box-shadow: var(--shadow-lg);
  background: var(--bg-card-hover);
}

.pricing-card.popular {
  border: 2px solid var(--accent-cyan);
  box-shadow: var(--shadow-glow);
  background: rgba(255, 255, 255, 0.88);
}

.popular-badge {
  position: absolute;
  top: -14px;
  right: 22px;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.3rem 0.95rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

.pricing-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.pricing-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.pricing-price {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 1.75rem;
  display: flex;
  align-items: baseline;
  font-family: 'Plus Jakarta Sans', monospace;
}

.pricing-price span {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-left: 0.3rem;
}

.pricing-features {
  list-style: none;
  margin-bottom: 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.pricing-features li {
  font-size: 0.925rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.pricing-features li i {
  color: var(--accent-emerald);
  font-size: 1.15rem;
}

/* Core Advantages Grid */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.85rem;
}

.advantage-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.advantage-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-cyan);
  background: var(--bg-card-hover);
}

.advantage-icon {
  width: 58px;
  height: 58px;
  background: var(--primary-light);
  border: 1px solid rgba(6, 182, 212, 0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.85rem;
  margin-bottom: 1.35rem;
  transition: var(--transition);
}

.advantage-card:hover .advantage-icon {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.advantage-title {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.advantage-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Knowledge Base & Tutorials Section */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.85rem;
  margin-bottom: 3.5rem;
}

.article-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-lg);
  padding: 1.85rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
  background: var(--bg-card-hover);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.article-tag {
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid rgba(6, 182, 212, 0.2);
}

.article-read-time {
  font-size: 0.8rem;
  color: var(--text-light);
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 0.85rem;
  transition: var(--transition);
}

.article-card:hover .article-card-title {
  color: var(--primary);
}

.article-card-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 1.5rem;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--primary);
  border-top: 1px solid var(--border-light);
  padding-top: 1rem;
}

/* FAQ Accordion */
.faq-accordion {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.faq-item {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.faq-question {
  padding: 1.35rem 1.65rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.faq-question i {
  color: var(--primary);
  font-size: 1.3rem;
  transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 0 1.65rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

.faq-item.active .faq-answer {
  max-height: 320px;
  padding-bottom: 1.35rem;
}

/* Reviews Section */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.85rem;
}

.review-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-lg);
  padding: 1.85rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-stars {
  color: var(--accent-amber);
  margin-bottom: 1rem;
  font-size: 1rem;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.user-avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.15rem;
  box-shadow: var(--shadow-glow);
}

.user-info h5 {
  font-size: 0.95rem;
  font-weight: 700;
}

.user-info p {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* Standalone Article Layout Styles */
.article-header-banner {
  background: var(--gradient-hero);
  border-bottom: 1px solid var(--border-cyber);
  padding: 4.5rem 3rem 3.5rem 3rem;
  position: relative;
}

.article-content-container {
  max-width: 940px;
  margin: 0 auto;
  padding: 3.5rem 2.5rem;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-cyber);
  box-shadow: var(--shadow-lg);
  margin-top: -3rem;
  position: relative;
  z-index: 10;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #334155;
}

.article-body h2 {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 2.25rem 0 1.15rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--primary-light);
}

.article-body h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 1.65rem 0 0.95rem 0;
}

.article-body p {
  margin-bottom: 1.35rem;
}

.article-body ul, .article-body ol {
  margin: 1.15rem 0 1.65rem 1.65rem;
}

.article-body li {
  margin-bottom: 0.55rem;
}

.article-cta-box {
  background: var(--gradient-hero);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  text-align: center;
  margin: 3.25rem 0 1.75rem 0;
  box-shadow: var(--shadow-sm);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.15rem;
}

.breadcrumb a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 700;
}

/* Footer Section */
.footer {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-cyber);
  padding: 3.5rem 3rem 2.25rem 3rem;
  margin-top: 5rem;
}

.footer-inner {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-bottom {
  border-top: 1px solid var(--border-light);
  padding-top: 1.65rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-light);
  flex-wrap: wrap;
  gap: 1rem;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.active {
    transform: translateX(0);
  }

  .mobile-header {
    display: flex;
  }

  .main-content {
    margin-left: 0;
    padding-top: 64px;
  }

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

  .hero-title {
    font-size: 2.5rem;
  }

  .section-wrapper {
    padding: 3.5rem 1.5rem;
  }

  .hero-section {
    padding: 3.5rem 1.5rem 2.5rem 1.5rem;
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 2.1rem;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .pricing-grid, .advantages-grid, .articles-grid, .reviews-grid {
    grid-template-columns: 1fr;
  }

  .article-header-banner {
    padding: 3rem 1.25rem 2.5rem 1.25rem;
  }

  .article-content-container {
    padding: 2.25rem 1.25rem;
  }
}