/* ==========================================================================
   飞星 FXVPN (fxvpn.homes) - Modern Futuristic Landing Page Stylesheet
   ========================================================================== */

:root {
  --bg-dark: #07090e;
  --bg-card: #0f172a;
  --bg-card-hover: #1e293b;
  --bg-accent: #111827;
  
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --secondary: #8b5cf6;
  --accent: #ec4899;
  --emerald: #10b981;
  --amber: #f59e0b;
  
  --text-main: #f8fafc;
  --text-sub: #94a3b8;
  --text-muted: #64748b;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(139, 92, 246, 0.4);
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.25);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1240px;
}

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

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

body {
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, rgba(59, 130, 246, 0.15), transparent 70%),
              radial-gradient(circle at 80% 40%, rgba(139, 92, 246, 0.1), transparent 60%);
  background-attachment: fixed;
}

/* Typography & Utilities */
a {
  color: inherit;
  text-decoration: none;
}

.text-gradient {
  background: linear-gradient(135deg, #60a5fa 0%, #a78bfa 50%, #f472b6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-emerald { color: var(--emerald); }
.text-primary { color: var(--primary); }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section-padding {
  padding: 96px 0;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-full);
  color: #60a5fa;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-sub);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  transition: var(--transition);
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(139, 92, 246, 0.5);
  background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* Header & Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 18px 0;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(7, 9, 14, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  padding: 14px 0;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
}

.brand-logo img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-sub);
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--text-main);
}

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

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  padding: 160px 0 100px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-full);
  color: #34d399;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

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

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-sub);
  margin-bottom: 36px;
  max-width: 620px;
  line-height: 1.7;
}

.hero-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}

.hero-metrics-list {
  display: flex;
  gap: 32px;
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
}

.hero-metric-item h4 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
}

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

/* Hero Widget Box */
.hero-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.hero-widget::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 60%);
  pointer-events: none;
}

.widget-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.widget-title {
  font-size: 1.1rem;
  font-weight: 700;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--emerald);
}

.widget-nodes-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.node-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.node-row:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border-highlight);
}

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

.node-flag {
  font-size: 1.4rem;
}

.node-name {
  font-size: 0.9rem;
  font-weight: 600;
}

.node-speed {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.ping-tag {
  padding: 4px 10px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--emerald);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  font-family: monospace;
}

/* Real-time Ping Latency Monitor Section */
.ping-monitor-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  margin-top: 32px;
}

.ping-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.ping-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: var(--transition);
}

.ping-item:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.ping-info {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.ping-flag { font-size: 1.8rem; }
.ping-title-text { font-size: 0.95rem; font-weight: 700; }
.ping-sub-text { font-size: 0.8rem; color: var(--text-muted); }

.ping-stat-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
}

.ping-ms-badge {
  font-family: monospace;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--emerald);
}

.ping-bar-bg {
  flex: 1;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  margin-left: 16px;
  overflow: hidden;
}

.ping-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--emerald), var(--primary));
  border-radius: 3px;
  transition: width 0.5s ease;
}

/* Bento Advantages Grid */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.bento-card:hover {
  border-color: var(--border-highlight);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.bento-card.span-2 {
  grid-column: span 2;
}

.bento-icon {
  width: 56px;
  height: 56px;
  background: rgba(59, 130, 246, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 20px;
}

.bento-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.bento-card p {
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
}

.pricing-card:hover {
  border-color: var(--border-highlight);
  transform: translateY(-6px);
}

.pricing-card.popular {
  background: linear-gradient(180deg, #1e1b4b 0%, #0f172a 100%);
  border: 2px solid var(--secondary);
  box-shadow: 0 0 35px rgba(139, 92, 246, 0.25);
}

.popular-tag {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  color: #fff;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.plan-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.plan-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 40px;
}

.plan-price-box {
  margin-bottom: 28px;
}

.plan-price {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
}

.plan-price span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
}

.plan-features {
  list-style: none;
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-sub);
}

.plan-features li svg {
  width: 18px;
  height: 18px;
  color: var(--emerald);
  flex-shrink: 0;
}

/* User Reviews Section */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.review-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-3px);
}

.review-rating {
  color: var(--amber);
  margin-bottom: 12px;
  font-size: 1.1rem;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-sub);
  margin-bottom: 20px;
  line-height: 1.6;
}

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

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #ffffff;
  font-size: 1.1rem;
}

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

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

/* FAQ Accordion Section */
.faq-wrapper {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.active {
  border-color: var(--primary);
}

.faq-question {
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
}

.faq-icon {
  font-size: 1.2rem;
  transition: transform 0.3s ease;
  color: var(--primary);
}

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

.faq-answer {
  padding: 0 28px 22px;
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.7;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

/* Articles Navigation Hub Section */
.articles-hub-section {
  background: rgba(15, 23, 42, 0.4);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.article-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
}

.article-tag {
  font-size: 0.78rem;
  color: var(--primary);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.article-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.4;
}

.article-card p {
  font-size: 0.88rem;
  color: var(--text-sub);
  margin-bottom: 20px;
  line-height: 1.6;
}

.article-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 700;
  color: #60a5fa;
  transition: var(--transition);
}

.article-link:hover {
  gap: 10px;
  color: var(--primary);
}

/* Footer & PBN Link Hub */
footer {
  background: #04060a;
  border-top: 1px solid var(--border-color);
  padding: 48px 0 32px;
  text-align: center;
}

.footer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
}

.footer-brand {
  font-size: 1.2rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.footer-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  max-width: 600px;
}

/* PBN Friendly Links Styling */
.friendly-links-area {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 12px 24px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 8px;
}

.friendly-links-area a {
  color: var(--text-sub);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
}

.friendly-links-area a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.copyright {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-btns {
    justify-content: center;
  }
  
  .hero-metrics-list {
    justify-content: center;
  }
  
  .bento-grid {
    grid-template-columns: 1fr;
  }
  
  .bento-card.span-2 {
    grid-column: span 1;
  }
  
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .reviews-grid, .articles-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .section-title {
    font-size: 1.8rem;
  }
  
  .hero-title {
    font-size: 2.2rem;
  }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-metrics-list {
    flex-direction: column;
    gap: 16px;
  }
}