/* ==========================================================================
   飞星 VPN (fxvpn.cfd) - 天外飞仙科幻美学核心样式表
   Design Concept: Celestial Tech & Cyberpunk Fusion
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Orbitron:wght@500;700;900&display=swap');

:root {
  --font-tech: 'Orbitron', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  
  --bg-primary: #070913;
  --bg-secondary: #0d1127;
  --bg-card: rgba(16, 22, 47, 0.65);
  --bg-card-hover: rgba(24, 34, 71, 0.8);
  
  --accent-cyan: #00f3ff;
  --accent-purple: #9d4edd;
  --accent-gold: #ffbe0b;
  --accent-blue: #3a86ff;
  
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --border-glow: rgba(0, 243, 255, 0.25);
  --border-dim: rgba(255, 255, 255, 0.08);
  
  --shadow-glow: 0 0 25px rgba(0, 243, 255, 0.2);
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-main);
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  position: relative;
  line-height: 1.6;
}

/* Background Celestial Overlay - High transparency and elegant dark overlay */
.celestial-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: linear-gradient(180deg, rgba(7, 9, 19, 0.6) 0%, rgba(7, 9, 19, 0.5) 50%, rgba(7, 9, 19, 0.85) 100%),
              radial-gradient(circle at 50% 20%, rgba(157, 78, 221, 0.25), transparent 60%),
              radial-gradient(circle at 80% 70%, rgba(0, 243, 255, 0.2), transparent 50%),
              url('../images/bg.jpg') no-repeat center center / cover;
  opacity: 0.35;
  z-index: -2;
  pointer-events: none;
}

.celestial-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(rgba(0, 243, 255, 0.03) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(0, 243, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  z-index: -1;
  pointer-events: none;
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(7, 9, 19, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glow);
  padding: 15px 0;
  transition: all 0.3s ease;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  box-shadow: 0 0 15px rgba(0, 243, 255, 0.5);
  border: 2px solid var(--accent-cyan);
}

.brand-text {
  font-family: var(--font-tech);
  font-size: 1.5rem;
  font-weight: 900;
  background: linear-gradient(135deg, #ffffff 0%, var(--accent-cyan) 50%, var(--accent-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: var(--accent-cyan);
  text-shadow: 0 0 8px rgba(0, 243, 255, 0.6);
}

.btn-cta {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  color: #fff !important;
  padding: 10px 24px;
  border-radius: 30px;
  font-weight: 700 !important;
  font-family: var(--font-tech);
  letter-spacing: 1px;
  box-shadow: 0 0 20px rgba(0, 243, 255, 0.4);
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(157, 78, 221, 0.7);
}

/* Hero Section */
.hero {
  padding: 180px 20px 100px;
  text-align: center;
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
}

.tech-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 243, 255, 0.08);
  border: 1px solid var(--accent-cyan);
  padding: 6px 18px;
  border-radius: 20px;
  font-family: var(--font-tech);
  font-size: 0.85rem;
  color: var(--accent-cyan);
  margin-bottom: 25px;
  box-shadow: 0 0 15px rgba(0, 243, 255, 0.15);
}

.hero-title {
  font-family: var(--font-tech);
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 25px;
  background: linear-gradient(180deg, #ffffff 30%, #a5f3fc 70%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 40px rgba(0, 243, 255, 0.3);
}

.hero-title span {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: #e2e8f0;
  max-width: 800px;
  margin: 0 auto 40px;
  line-height: 1.8;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.9);
}

.hero-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, #00b4d8 50%, var(--accent-purple) 100%);
  color: #070913;
  font-weight: 800;
  font-family: var(--font-tech);
  font-size: 1.1rem;
  padding: 16px 40px;
  border-radius: 40px;
  text-decoration: none;
  box-shadow: 0 0 30px rgba(0, 243, 255, 0.5);
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 0 45px rgba(157, 78, 221, 0.8);
  color: #ffffff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glow);
  color: var(--text-main);
  font-weight: 600;
  font-size: 1rem;
  padding: 16px 36px;
  border-radius: 40px;
  text-decoration: none;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(0, 243, 255, 0.15);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

/* Variant D: Interactive Cyber Network Circuit Board Topology */
.circuit-topology-box {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 35px 30px;
  backdrop-filter: blur(20px);
  margin: 50px auto 0;
  max-width: 1200px;
  box-shadow: 0 15px 45px rgba(0, 0, 0, 0.4);
}

.circuit-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  padding-bottom: 15px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.circuit-live-status {
  font-size: 0.9rem;
  color: #4ade80;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

.circuit-sla-badge {
  font-family: var(--font-tech);
  font-size: 0.8rem;
  color: var(--accent-cyan);
  background: rgba(0, 243, 255, 0.1);
  padding: 5px 14px;
  border-radius: 12px;
  border: 1px solid rgba(0, 243, 255, 0.3);
}

.circuit-flow-pipeline {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 30px;
}

.circuit-node-card {
  background: rgba(13, 17, 39, 0.85);
  border: 1px solid rgba(0, 243, 255, 0.2);
  border-radius: var(--radius-md);
  padding: 24px 18px;
  flex: 1;
  text-align: center;
  transition: all 0.35s ease;
  position: relative;
}

.circuit-node-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-6px);
  box-shadow: 0 0 30px rgba(0, 243, 255, 0.3);
}

.circuit-node-card.active-tunnel {
  border: 1px solid var(--accent-cyan);
  box-shadow: 0 0 25px rgba(0, 243, 255, 0.25);
  background: rgba(20, 28, 62, 0.9);
}

.node-step {
  font-family: var(--font-tech);
  font-size: 0.72rem;
  color: var(--accent-cyan);
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.node-icon {
  font-size: 2.2rem;
  margin-bottom: 10px;
}

.node-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.node-desc {
  font-size: 0.8公里rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 14px;
}

.node-pill {
  font-size: 0.72rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  padding: 3px 10px;
  border-radius: 10px;
}

.node-pill.active {
  color: var(--accent-cyan);
  background: rgba(0, 243, 255, 0.15);
  font-weight: 700;
}

.circuit-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0 5px;
}

.connector-arrow {
  font-size: 1.2rem;
  color: var(--accent-cyan);
  text-shadow: 0 0 10px var(--accent-cyan);
  animation: pulseArrow 1.5s infinite alternate;
}

@keyframes pulseArrow {
  from { opacity: 0.4; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1.2); }
}

.circuit-unlock-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 15px;
  background: rgba(7, 9, 19, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 15px;
  text-align: center;
}

.unlock-item {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

@media (max-width: 900px) {
  .circuit-flow-pipeline {
    flex-direction: column;
    gap: 20px;
  }
  .circuit-connector {
    transform: rotate(90deg);
  }
  .circuit-unlock-bar {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Global Multi-Country Nodes Matrix Radar Section */
.global-nodes-section {
  padding: 90px 20px;
  max-width: 1280px;
  margin: 0 auto;
}

.nodes-filter-bar {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.filter-btn {
  background: rgba(13, 17, 39, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  font-family: var(--font-tech);
  font-size: 0.85rem;
  padding: 8px 20px;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.filter-btn.active, .filter-btn:hover {
  background: rgba(0, 243, 255, 0.15);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 243, 255, 0.3);
}

.global-nodes-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.country-node-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 22px 18px;
  backdrop-filter: blur(12px);
  transition: all 0.3s ease;
  position: relative;
  text-align: left;
}

.country-node-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-5px);
  box-shadow: 0 0 25px rgba(0, 243, 255, 0.25);
}

.country-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.country-flag-name {
  display: flex;
  align-items: center;
  gap: 10px;
}

.country-flag {
  font-size: 1.5rem;
}

.country-name {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
}

.country-ping {
  font-family: var(--font-tech);
  font-size: 0.82rem;
  font-weight: 800;
  color: #4ade80;
  background: rgba(74, 222, 128, 0.1);
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid rgba(74, 222, 128, 0.25);
}

.country-line-type {
  font-size: 0.8rem;
  color: var(--accent-cyan);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.load-bar-wrapper {
  margin-top: 10px;
}

.load-bar-text {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.load-bar-bg {
  width: 100%;
  height: 5px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

.load-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  border-radius: 3px;
}

.node-badges {
  display: flex;
  gap: 6px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.node-badge-sm {
  font-size: 0.7rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  padding: 2px 8px;
  border-radius: 4px;
}

@media (max-width: 1100px) {
  .global-nodes-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .global-nodes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 500px) {
  .global-nodes-grid {
    grid-template-columns: 1fr;
  }
}

/* Side-by-Side Unified Split Dashboard (Left: Arch Matrix, Right: Pricing) */
.split-dashboard-section {
  padding: 90px 20px;
  max-width: 1400px;
  margin: 0 auto;
}

.split-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  align-items: stretch;
}

.split-col {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 35px 28px;
  backdrop-filter: blur(15px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.split-col-header {
  margin-bottom: 25px;
  text-align: left;
}

.split-col-header .section-tag {
  display: inline-block;
  margin-bottom: 6px;
  font-family: var(--font-tech);
  color: var(--accent-cyan);
  font-size: 0.85rem;
  letter-spacing: 2px;
}

.split-col-header .section-title {
  font-family: var(--font-tech);
  font-size: 1.8rem;
  font-weight: 800;
  color: #ffffff;
  text-align: left;
}

/* Variant E: Vertical Connected Flow Pipeline Architecture */
.arch-flow-vertical-pipeline {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
  position: relative;
}

.pipeline-stage-card {
  background: linear-gradient(135deg, rgba(16, 22, 47, 0.85) 0%, rgba(10, 14, 30, 0.9) 100%);
  border: 1px solid rgba(0, 243, 255, 0.2);
  border-left: 4px solid var(--accent-cyan);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  text-align: left;
  position: relative;
  transition: all 0.3s ease;
}

.pipeline-stage-card:hover {
  border-color: var(--accent-cyan);
  transform: translateX(6px);
  box-shadow: 0 0 25px rgba(0, 243, 255, 0.3);
  background: rgba(20, 28, 62, 0.9);
}

.pipeline-stage-card.active-tunnel-stage {
  border-left: 4px solid var(--accent-purple);
  background: linear-gradient(135deg, rgba(24, 28, 65, 0.9) 0%, rgba(13, 17, 39, 0.95) 100%);
  box-shadow: 0 0 20px rgba(157, 78, 221, 0.25);
}

.stage-top-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.stage-number {
  font-family: var(--font-tech);
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--accent-cyan);
  background: rgba(0, 243, 255, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
}

.stage-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.stage-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 10px;
}

.stage-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.stage-tag-pill {
  font-size: 0.72rem;
  color: var(--accent-cyan);
  background: rgba(0, 243, 255, 0.08);
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid rgba(0, 243, 255, 0.15);
}

.pipeline-flow-arrow {
  text-align: center;
  font-size: 1rem;
  color: var(--accent-cyan);
  margin: -4px 0;
  z-index: 2;
  text-shadow: 0 0 8px var(--accent-cyan);
  animation: pulseArrowDown 1.5s infinite alternate;
}

@keyframes pulseArrowDown {
  from { opacity: 0.4; transform: translateY(-2px); }
  to { opacity: 1; transform: translateY(2px); }
}

.cyber-node-bar-2x2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

/* Left Column: Vertical Hub Stack (直排展示) */
.cyber-hub-vertical-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 25px;
}

.cyber-hub-vertical-card {
  background: linear-gradient(145deg, rgba(16, 22, 47, 0.85) 0%, rgba(9, 13, 30, 0.9) 100%);
  border: 1px solid rgba(0, 243, 255, 0.2);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  text-align: left;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.cyber-hub-vertical-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--accent-cyan), var(--accent-purple));
}

.cyber-hub-vertical-card:hover {
  border-color: var(--accent-cyan);
  transform: translateX(6px);
  box-shadow: 0 0 25px rgba(0, 243, 255, 0.25);
}

.cyber-hub-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.cyber-hub-title-sm {
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.cyber-hub-desc-sm {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

  background: rgba(13, 17, 39, 0.8);
  border: 1px solid rgba(0, 243, 255, 0.2);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s ease;
  position: relative;
  text-align: left;
}

.arch-card-compact:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
  box-shadow: 0 0 25px rgba(0, 243, 255, 0.25);
  background: rgba(20, 28, 62, 0.85);
}

.arch-card-tag {
  font-family: var(--font-tech);
  font-size: 0.72rem;
  color: var(--accent-cyan);
  background: rgba(0, 243, 255, 0.08);
  padding: 3px 8px;
  border-radius: 6px;
  display: inline-block;
  margin-bottom: 10px;
  border: 1px solid rgba(0, 243, 255, 0.2);
}

.arch-card-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.arch-card-list {
  list-style: none;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.arch-card-list li {
  padding: 4px 0;
  display: flex;
  align-items: center;
  gap: 6px;
}

.arch-card-list li::before {
  content: '✓';
  color: var(--accent-cyan);
  font-weight: bold;
}

@media (max-width: 1100px) {
  .split-wrapper {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .pricing-2x2-grid, .arch-2x2-grid, .cyber-node-bar-2x2 {
    grid-template-columns: 1fr;
  }
}

/* Features Section */
.section {
  padding: 90px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  font-family: var(--font-tech);
  color: var(--accent-cyan);
  font-size: 0.9rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 10px;
  display: block;
}

.section-title {
  font-family: var(--font-tech);
  font-size: 2.5rem;
  font-weight: 800;
  color: #ffffff;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  padding: 30px 22px;
  border-radius: var(--radius-lg);
  backdrop-filter: blur(15px);
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
}

@media (max-width: 1080px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}

@media (max-width: 600px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-glow);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  font-size: 2.8rem;
  margin-bottom: 20px;
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.feature-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
}

.feature-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

@media (max-width: 1080px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .pricing-grid {
    grid-template-columns: 1fr;
  }
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg);
  padding: 40px 30px;
  backdrop-filter: blur(15px);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.4s ease;
}

.pricing-card.popular {
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 0 35px rgba(0, 243, 255, 0.25);
  transform: scale(1.03);
}

.popular-badge {
  position: absolute;
  top: -15px;
  right: 25px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  color: #070913;
  font-family: var(--font-tech);
  font-size: 0.75rem;
  font-weight: 900;
  padding: 6px 14px;
  border-radius: 12px;
  text-transform: uppercase;
}

.plan-name {
  font-family: var(--font-tech);
  font-size: 1.4rem;
  color: #fff;
  margin-bottom: 15px;
}

.plan-price {
  font-family: var(--font-tech);
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--accent-cyan);
  margin-bottom: 20px;
}

.plan-price span {
  font-size: 1rem;
  color: var(--text-muted);
  font-weight: 400;
}

.plan-features {
  list-style: none;
  margin-bottom: 30px;
}

.plan-features li {
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.plan-features li::before {
  content: '✓';
  color: var(--accent-cyan);
  font-weight: bold;
}

.btn-plan {
  width: 100%;
  padding: 14px;
  border-radius: 30px;
  text-align: center;
  text-decoration: none;
  font-family: var(--font-tech);
  font-weight: 700;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  display: block;
}

.btn-plan-outline {
  border: 1px solid var(--border-glow);
  color: var(--accent-cyan);
  background: rgba(0, 243, 255, 0.05);
}

.btn-plan-outline:hover {
  background: var(--accent-cyan);
  color: #070913;
  box-shadow: 0 0 20px rgba(0, 243, 255, 0.5);
}

.btn-plan-solid {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  color: #070913;
  box-shadow: 0 0 20px rgba(0, 243, 255, 0.4);
}

.btn-plan-solid:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(157, 78, 221, 0.7);
  color: #ffffff;
}

/* Horizontal Auto-Scrolling Customer Reviews (Marquee) */
.reviews-section {
  overflow: hidden;
  position: relative;
  padding: 80px 0;
}

.marquee-container {
  display: flex;
  width: 100%;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.marquee-track {
  display: flex;
  gap: 25px;
  animation: marqueeScroll 35s linear infinite;
  white-space: nowrap;
  padding: 10px 0;
}

.marquee-track:hover {
  animation-play-state: paused;
}

@keyframes marqueeScroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

.review-card {
  width: 350px;
  flex-shrink: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg);
  padding: 25px;
  backdrop-filter: blur(12px);
  transition: border-color 0.3s ease;
  white-space: normal;
}

.review-card:hover {
  border-color: var(--accent-cyan);
}

.review-user {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 15px;
}

.user-avatar {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-tech);
  font-weight: 700;
  color: #070913;
}

.user-info h4 {
  font-size: 1rem;
  color: #fff;
}

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

.review-stars {
  color: var(--accent-gold);
  margin-bottom: 10px;
  font-size: 0.9rem;
}

.review-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Articles Section Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg);
  padding: 30px;
  backdrop-filter: blur(15px);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.article-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
}

.article-tag {
  display: inline-block;
  background: rgba(157, 78, 221, 0.15);
  color: var(--accent-purple);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 12px;
  margin-bottom: 15px;
}

.article-card h3 {
  font-size: 1.2rem;
  color: #fff;
  margin-bottom: 15px;
  line-height: 1.5;
}

.article-card h3 a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease;
}

.article-card h3 a:hover {
  color: var(--accent-cyan);
}

.article-excerpt {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

.article-link {
  color: var(--accent-cyan);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s ease;
}

.article-link:hover {
  gap: 10px;
}

/* FAQ Accordion Section */
.faq-container {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  margin-bottom: 15px;
  overflow: hidden;
  backdrop-filter: blur(10px);
  transition: border-color 0.3s ease;
}

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

.faq-question {
  padding: 22px 25px;
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-question::after {
  content: '+';
  font-family: var(--font-tech);
  font-size: 1.4rem;
  color: var(--accent-cyan);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-question::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 25px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 25px 22px;
}

/* Article Detail Page Layout */
.article-page {
  padding: 140px 20px 80px;
  max-width: 900px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 0.9rem;
  color: var(--text-dim);
  margin-bottom: 30px;
}

.breadcrumb a {
  color: var(--accent-cyan);
  text-decoration: none;
}

.article-header {
  margin-bottom: 40px;
}

.article-header h1 {
  font-size: 2.3rem;
  color: #fff;
  margin-bottom: 15px;
  line-height: 1.3;
}

.article-meta {
  display: flex;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.article-body {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg);
  padding: 45px;
  backdrop-filter: blur(15px);
  color: #cbd5e1;
  font-size: 1.05rem;
  line-height: 1.9;
}

.article-body h2 {
  font-size: 1.6rem;
  color: #fff;
  margin: 40px 0 20px;
  border-left: 4px solid var(--accent-cyan);
  padding-left: 15px;
}

.article-body h3 {
  font-size: 1.3rem;
  color: var(--accent-cyan);
  margin: 30px 0 15px;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin: 0 0 20px 25px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body a {
  color: var(--accent-cyan);
  text-decoration: underline;

}

.article-body code {
  background: rgba(0, 243, 255, 0.1);
  color: var(--accent-cyan);
  padding: 3px 8px;
  border-radius: 4px;
  font-family: monospace;
}

.article-body blockquote {
  border-left: 4px solid var(--accent-purple);
  background: rgba(157, 78, 221, 0.1);
  padding: 15px 20px;
  margin: 25px 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.article-navigation {
  margin-top: 50px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.nav-box {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  padding: 20px;
  border-radius: var(--radius-md);
  flex: 1;
  text-decoration: none;
  color: var(--text-muted);
  transition: all 0.3s ease;
}

.nav-box:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.nav-box span {
  display: block;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 5px;
}

/* Footer & Low-Profile PBN Friend Links */
footer {
  background: #04050b;
  border-top: 1px solid var(--border-dim);
  padding: 60px 20px 30px;
  text-align: center;
  margin-top: 80px;
  position: relative;
}

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

.footer-brand {
  margin-bottom: 25px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 25px;
  list-style: none;
  margin-bottom: 30px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: var(--accent-cyan);
}

.copyright {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 25px;
}

/* Low-profile SEO / PBN Friend Link Section */
.friend-links-area {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px dashed rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.35);
}

.friend-links-area span {
  color: rgba(255, 255, 255, 0.25);
}

.friend-links-area a {
  color: rgba(255, 255, 255, 0.45);
  text-decoration: none;
  transition: color 0.3s ease;
}

.friend-links-area a:hover {
  color: var(--accent-cyan);
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2rem;
  }
  .nav-links {
    display: none;
  }
  .article-body {
    padding: 25px 20px;
  }
  .friend-links-area {
    flex-direction: column;
    gap: 10px;
  }
}