/* ==========================================================================
   疾风云 (Jifeng Cloud) - Premium Apple-Style CSS stylesheet
   ========================================================================== */

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* CSS Variables */
:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  
  /* Color Palette - Premium Sleek Dark Mode */
  --bg-primary: #000000;
  --bg-secondary: #0a0a0c;
  --bg-tertiary: #121216;
  --bg-card: rgba(22, 22, 26, 0.6);
  --bg-card-hover: rgba(30, 30, 38, 0.8);
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  
  --text-primary: #ffffff;
  --text-secondary: #86868b; /* Apple Style Muted */
  --text-tertiary: #6e6e73;
  
  --accent-blue: #0071e3;
  --accent-blue-hover: #147ce5;
  --accent-purple: #8636f2;
  --accent-cyan: #00f2fe;
  
  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #ffffff 30%, #a1a1a6 100%);
  --gradient-accent: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  --gradient-cta: linear-gradient(135deg, #8636f2 0%, #0071e3 100%);
  --gradient-purple-blue: linear-gradient(135deg, #c084fc 0%, #6366f1 100%);
  --gradient-glow: radial-gradient(circle at 50% 50%, rgba(134, 54, 242, 0.15) 0%, transparent 60%);
  
  /* Spacing & Borders */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --max-width: 1200px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: hidden;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: #222;
  border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
  background: #333;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 6rem 0;
  position: relative;
}

.section-bg-glow {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 100%;
  background: var(--gradient-glow);
  pointer-events: none;
  z-index: 0;
}

.text-center {
  text-align: center;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.section-tag {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  margin-bottom: 1rem;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

@media (min-width: 768px) {
  .section-title {
    font-size: 3.5rem;
  }
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 3rem auto;
  line-height: 1.6;
}

/* Custom Buttons & Links */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-xl);
  text-decoration: none;
  transition: var(--transition-smooth);
  cursor: pointer;
  border: none;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--gradient-cta);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(134, 54, 242, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(134, 54, 242, 0.5);
  background: linear-gradient(135deg, #9b51e0 0%, #0080ff 100%);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4rem;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  text-decoration: none;
  background: var(--gradient-cta);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo span {
  font-size: 1rem;
  background: rgba(134, 54, 242, 0.15);
  border: 1px solid rgba(134, 54, 242, 0.3);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  color: #c084fc;
  -webkit-text-fill-color: #c084fc;
}

.nav-links {
  display: none; /* Desktop only */
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition-smooth);
}

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

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

/* Hero Section */
.hero {
  padding-top: 10rem;
  padding-bottom: 6rem;
  position: relative;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(134, 54, 242, 0.2) 0%, transparent 70%);
  z-index: 0;
  filter: blur(80px);
  pointer-events: none;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3rem;
  position: relative;
  z-index: 1;
}

.hero-text {
  text-align: center;
  max-width: 800px;
}

.hero-tagline {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-xl);
  font-size: 0.875rem;
  color: #a1a1a6;
  margin-bottom: 2rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-tagline span {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: #34c759;
  border-radius: 50%;
  box-shadow: 0 0 10px #34c759;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  background: linear-gradient(180deg, #ffffff 40%, rgba(255,255,255,0.7) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
}

.hero p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

.hero-ctas {
  display: flex;
  flex-direction: column;
  width: 100%;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 3rem;
}

.hero-graphic {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 400px;
}

/* Earth Orbit Animation */
.earth-system {
  position: relative;
  width: 320px;
  height: 320px;
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 1000px;
}

.earth {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #3a86ff 0%, #002575 70%, #020617 100%);
  box-shadow: 0 0 50px rgba(58, 134, 255, 0.4), inset -10px -10px 25px rgba(0,0,0,0.9);
  position: relative;
  z-index: 5;
  animation: pulseEarth 6s ease-in-out infinite alternate;
}

.orbit {
  position: absolute;
  border: 1px dashed rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  transform: rotateX(60deg) rotateY(-15deg);
  transform-style: preserve-3d;
}

.orbit-1 {
  width: 180px;
  height: 180px;
  animation: rotateOrbit1 12s linear infinite;
}

.orbit-2 {
  width: 260px;
  height: 260px;
  animation: rotateOrbit2 20s linear infinite;
}

.orbit-node {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #c084fc;
  box-shadow: 0 0 10px #c084fc, 0 0 20px #8636f2;
  transform: rotateX(-60deg) rotateY(15deg);
  transform-style: preserve-3d;
}

.orbit-node::after {
  content: attr(data-label);
  position: absolute;
  top: -1.4rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.65rem;
  color: #fff;
  white-space: nowrap;
  background: rgba(18, 18, 22, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-sm);
  pointer-events: none;
}

.node-hk { top: 0; left: 50%; margin-left: -5px; margin-top: -5px; }
.node-sg { bottom: 0; left: 50%; margin-left: -5px; margin-bottom: -5px; }
.node-us { left: 0; top: 50%; margin-top: -5px; margin-left: -5px; }
.node-jp { right: 0; top: 50%; margin-top: -5px; margin-right: -5px; }

@keyframes rotateOrbit1 {
  0% { transform: rotateX(60deg) rotateY(-15deg) rotateZ(0deg); }
  100% { transform: rotateX(60deg) rotateY(-15deg) rotateZ(360deg); }
}

@keyframes rotateOrbit2 {
  0% { transform: rotateX(60deg) rotateY(-15deg) rotateZ(360deg); }
  100% { transform: rotateX(60deg) rotateY(-15deg) rotateZ(0deg); }
}

@keyframes pulseEarth {
  0% { box-shadow: 0 0 40px rgba(58, 134, 255, 0.3); }
  100% { box-shadow: 0 0 60px rgba(58, 134, 255, 0.6), 0 0 25px rgba(134, 54, 242, 0.3); }
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  width: 100%;
  max-width: 600px;
  margin-top: 2rem;
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
}

@media (min-width: 992px) {
  .hero-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  
  .hero-text {
    text-align: left;
    max-width: 620px;
  }
  
  .hero h1 {
    font-size: 4rem;
  }
  
  .hero-ctas {
    flex-direction: row;
    width: auto;
    justify-content: flex-start;
  }
  
  .hero-stats {
    margin-left: 0;
  }
}

.stat-item {
  text-align: center;
}

@media (min-width: 992px) {
  .stat-item {
    text-align: left;
  }
}

.stat-val {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-purple-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
}

.stat-lbl {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-top: 0.25rem;
  letter-spacing: 0.05em;
}

/* Features/Advantages Section */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  position: relative;
  z-index: 1;
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.card-icon {
  width: 4rem;
  height: 4rem;
  border-radius: var(--radius-md);
  background: rgba(134, 54, 242, 0.1);
  border: 1px solid rgba(134, 54, 242, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  color: #c084fc;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.card-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Streaming & AI Cards */
.media-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 2rem;
}

@media (min-width: 768px) {
  .media-grid {
    grid-template-columns: 1.2fr 0.8fr;
  }
}

.media-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.media-logos {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.logo-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  padding: 1rem;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.875rem;
  transition: var(--transition-smooth);
}

.logo-item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-hover);
  transform: scale(1.05);
}

.logo-icon {
  font-size: 1.5rem;
}

.media-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.media-tag {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-xl);
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Pricing Table */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: stretch;
  max-width: 1000px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.pricing-card.popular {
  border-color: #8636f2;
  background: linear-gradient(180deg, rgba(134, 54, 242, 0.05) 0%, rgba(134, 54, 242, 0.01) 100%);
  box-shadow: 0 10px 40px rgba(134, 54, 242, 0.1);
}

.pricing-card.popular::before {
  content: "推荐方案";
  position: absolute;
  top: 1.25rem;
  right: -2rem;
  background: var(--gradient-cta);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 2rem;
  transform: rotate(45deg);
  letter-spacing: 0.05em;
}

.pricing-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
}

.pricing-card.popular:hover {
  border-color: #a855f7;
}

.plan-name {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.plan-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.plan-price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 2rem;
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}

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

.plan-features {
  list-style: none;
  margin-bottom: 3rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  flex-grow: 1;
}

.plan-features li {
  font-size: 0.95rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.plan-features li::before {
  content: "✓";
  color: #34c759;
  font-weight: bold;
}

.pricing-card .btn {
  width: 100%;
}

/* FAQ Accordion (Pure HTML/CSS using details & summary) */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

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

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

.faq-item summary {
  padding: 1.5rem;
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--text-secondary);
  transition: var(--transition-smooth);
}

.faq-item[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}

.faq-content {
  padding: 0 1.5rem 1.5rem 1.5rem;
  color: var(--text-secondary);
  line-height: 1.6;
  font-size: 0.95rem;
}

/* Testimonials / Reviews */
.reviews-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  .reviews-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.review-stars {
  color: #ffb800;
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.review-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 2rem;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.author-avatar {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--gradient-purple-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  color: #fff;
}

.author-info h4 {
  font-size: 0.95rem;
  font-weight: 600;
}

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

/* Call to Action Banner */
.cta-banner {
  background: linear-gradient(135deg, rgba(134, 54, 242, 0.2) 0%, rgba(0, 113, 227, 0.1) 100%);
  border: 1px solid rgba(134, 54, 242, 0.3);
  border-radius: var(--radius-xl);
  padding: 4rem 2rem;
  text-align: center;
  max-width: 900px;
  margin: 4rem auto 0 auto;
  position: relative;
  overflow: hidden;
}

.cta-banner-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(134, 54, 242, 0.25) 0%, transparent 70%);
  filter: blur(50px);
  pointer-events: none;
}

.cta-banner h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.cta-banner p {
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 2rem auto;
}

/* Footer (ONLY 4 distinct links) */
footer {
  border-top: 1px solid var(--border-color);
  padding: 4rem 0;
  background: var(--bg-secondary);
  text-align: center;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-cta);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-decoration: none;
  display: inline-block;
  margin-bottom: 2rem;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  max-width: 600px;
  margin: 0 auto 3rem auto;
}

@media (min-width: 768px) {
  .footer-nav {
    grid-template-columns: repeat(4, 1fr);
  }
}

.footer-link-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem 1rem;
  transition: var(--transition-smooth);
}

.footer-link-box:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-hover);
  transform: translateY(-3px);
}

.footer-nav a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  display: block;
}

.footer-nav a span {
  display: block;
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 400;
  margin-top: 0.25rem;
}

.copyright {
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

/* Sub-page Article Styling (About, Terms, Privacy, Sitemap) */
.subpage-container {
  padding-top: 8rem;
  padding-bottom: 6rem;
  max-width: 800px;
  margin: 0 auto;
}

.subpage-header {
  margin-bottom: 4rem;
  text-align: center;
}

.subpage-header h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

@media (min-width: 768px) {
  .subpage-header h1 {
    font-size: 3.5rem;
  }
}

.subpage-meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.article-content {
  line-height: 1.8;
  color: #d1d1d6;
}

.article-content h2 {
  font-size: 1.75rem;
  margin-top: 3rem;
  margin-bottom: 1.25rem;
  color: #fff;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.article-content h3 {
  font-size: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: #fff;
}

.article-content p {
  margin-bottom: 1.5rem;
}

.article-content ul, .article-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.back-to-home {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: #c084fc;
  text-decoration: none;
  font-weight: 600;
  margin-bottom: 2rem;
  transition: var(--transition-smooth);
}

.back-to-home:hover {
  transform: translateX(-5px);
  color: #a855f7;
}

/* Node grid (for About Us node coverage details) */
.node-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin: 2rem 0;
}

@media (min-width: 480px) {
  .node-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.node-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  padding: 1.25rem 1rem;
  border-radius: var(--radius-md);
  text-align: center;
  font-weight: 600;
}

.node-status {
  width: 8px;
  height: 8px;
  background: #34c759;
  border-radius: 50%;
  display: inline-block;
  margin-right: 0.5rem;
  box-shadow: 0 0 8px #34c759;
}

/* Sitemap List Styles */
.sitemap-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin-bottom: 2rem;
}

.sitemap-section h2 {
  border-bottom: none;
  margin-top: 0;
}

.sitemap-links {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.sitemap-links a {
  color: #c084fc;
  text-decoration: none;
  font-weight: 500;
  font-size: 1.125rem;
  transition: var(--transition-smooth);
}

.sitemap-links a:hover {
  color: #a855f7;
  padding-left: 0.5rem;
}

.sitemap-links span {
  display: block;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

/* SEO Article Grid & Cards */
.posts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 2rem;
}

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

@media (min-width: 992px) {
  .posts-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
  backdrop-filter: blur(10px);
}

.post-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.post-card-banner {
  height: 120px;
  background: linear-gradient(135deg, rgba(134, 54, 242, 0.15) 0%, rgba(0, 113, 227, 0.15) 100%);
  border-bottom: 1px solid var(--border-color);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}

.post-card-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.post-card-tag {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: #c084fc;
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.post-card-title {
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  height: 3.1rem;
}

.post-card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  height: 4.2rem;
  flex-grow: 1;
}

.post-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 1rem;
  margin-top: auto;
}

.post-card-date {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.post-card-link {
  font-size: 0.875rem;
  color: #c084fc;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition-smooth);
}

.post-card-link:hover {
  color: #a855f7;
}