/* 网际快车-极速实验室 (wjkcloud.homes) Cyber Volt Blue & Neon Indigo Theme */
:root {
  --bg-dark: #070B14;
  --bg-surface: #0E1626;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --border: rgba(59, 130, 246, 0.22);
  --border-glow: rgba(139, 92, 246, 0.45);
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --primary: #3B82F6;
  --primary-glow: #60A5FA;
  --accent-purple: #8B5CF6;
  --accent-cyan: #06B6D4;
  --accent-green: #10B981;
  --gradient-main: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 50%, #06B6D4 100%);
  --gradient-card: linear-gradient(180deg, rgba(30, 41, 59, 0.6) 0%, rgba(15, 23, 42, 0.8) 100%);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(59, 130, 246, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 85% 70%, rgba(139, 92, 246, 0.12) 0%, transparent 45%),
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
  min-height: 100vh;
}

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

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 11, 20, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.brand img {
  width: 40px;
  height: 40px;
}
.brand-text {
  display: flex;
  flex-direction: column;
}
.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
}
.brand-tag {
  font-size: 0.72rem;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 600;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--primary-glow);
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-main);
  color: #fff !important;
  padding: 8px 18px;
  border-radius: 8px;
  font-weight: 600 !important;
  font-size: 0.9rem;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.35);
  transition: transform 0.2s, box-shadow 0.2s;
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid var(--border);
  border-radius: 9999px;
  font-size: 0.85rem;
  color: var(--primary-glow);
  margin-bottom: 24px;
}
.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-green);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.25); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}
.hero h1 {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -1px;
}
.hero h1 span {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto 36px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--gradient-main);
  color: #fff;
  padding: 14px 32px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
  transition: all 0.2s;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(59, 130, 246, 0.6);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 14px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.2s;
}
.btn-secondary:hover {
  background: rgba(59, 130, 246, 0.15);
  border-color: var(--primary);
}

/* Radar & Telemetry HUD */
.telemetry-section {
  padding: 40px 0 80px;
}
.hud-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  position: relative;
  overflow: hidden;
}
.hud-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: var(--gradient-main);
}
.hud-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}
.hud-title {
  display: flex;
  align-items: center;
  gap: 12px;
}
.hud-title h3 {
  font-size: 1.3rem;
  font-weight: 700;
}
.live-badge {
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 9999px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-green);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}
.node-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}
.node-card {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: transform 0.2s, border-color 0.2s;
}
.node-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}
.node-info {
  display: flex;
  align-items: center;
  gap: 12px;
}
.node-flag {
  font-size: 1.6rem;
}
.node-name {
  font-weight: 700;
  font-size: 0.95rem;
}
.node-type {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.node-stat {
  text-align: right;
}
.node-ping {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--accent-green);
  font-family: var(--font-mono);
}
.node-status {
  font-size: 0.72rem;
  color: var(--accent-cyan);
}

/* Feature Grid */
.features-section {
  padding: 60px 0;
}
.section-title {
  text-align: center;
  margin-bottom: 48px;
}
.section-title h2 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
}
.section-title p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px 28px;
  transition: all 0.3s;
  position: relative;
}
.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary-glow);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(59, 130, 246, 0.15);
}
.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: rgba(59, 130, 246, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--primary-glow);
  font-size: 1.6rem;
}
.card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
  color: var(--text-primary);
}
.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* Architecture Table */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 24px;
  background: var(--bg-card);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.comparison-table th, .comparison-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.comparison-table th {
  background: rgba(30, 41, 59, 0.5);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.comparison-table tr:last-child td {
  border-bottom: none;
}
.comparison-table td.highlight {
  color: var(--accent-green);
  font-weight: 700;
}

/* Banner / CTA */
.cta-banner {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(139, 92, 246, 0.2) 100%);
  border: 1px solid var(--border-glow);
  border-radius: 20px;
  padding: 48px;
  text-align: center;
  margin: 60px 0 80px;
  position: relative;
  overflow: hidden;
}
.cta-banner h2 {
  font-size: 2.2rem;
  margin-bottom: 16px;
  font-weight: 800;
}
.cta-banner p {
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 30px;
  font-size: 1.05rem;
}

/* Footer */
footer {
  background: #030712;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 60px 0 30px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-desc {
  margin-top: 16px;
  line-height: 1.7;
  max-width: 380px;
  color: var(--text-muted);
}
.footer-col h4 {
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.footer-col ul {
  list-style: none;
}
.footer-col li {
  margin-bottom: 10px;
}
.footer-col a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-col a:hover {
  color: var(--primary-glow);
}
.footer-links-box {
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 36px;
}
.footer-links-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.friendly-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
}
.friendly-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.2s;
}
.friendly-links a:hover {
  color: var(--accent-cyan);
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}

/* Article Layout */
.article-header {
  padding: 60px 0 30px;
  text-align: center;
}
.article-header h1 {
  font-size: 2.6rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}
.article-meta {
  display: flex;
  justify-content: center;
  gap: 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 30px;
}
.article-content {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px;
  line-height: 1.8;
  color: #CBD5E1;
  font-size: 1.05rem;
}
.article-content h2 {
  font-size: 1.7rem;
  color: var(--text-primary);
  margin: 36px 0 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 8px;
}
.article-content h3 {
  font-size: 1.3rem;
  color: var(--primary-glow);
  margin: 24px 0 12px;
}
.article-content p {
  margin-bottom: 18px;
}
.article-content ul, .article-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
}
.article-content li {
  margin-bottom: 8px;
}
.article-content blockquote {
  border-left: 4px solid var(--primary);
  padding: 12px 20px;
  background: rgba(59, 130, 246, 0.08);
  margin: 24px 0;
  border-radius: 0 8px 8px 0;
  font-style: italic;
  color: #E2E8F0;
}

@media (max-width: 768px) {
  .hero h1 { font-size: 2.2rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .article-content { padding: 24px; }
}