/* ==========================================================================
   闪狐 FlashFox - Cybersecurity & Networking Startup Theme
   Aesthetic: Off-white Background, Dark Charcoal Text, Emerald Green Accents (#10b981)
   Features: Generous Whitespace, Subtle Shadows, Soft Rounded Corners, Smooth Transitions
   ========================================================================== */

/* 1. CSS Variables & Theme Setup */
:root {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  
  --emerald-primary: #10b981;
  --emerald-hover: #059669;
  --emerald-dark: #047857;
  --emerald-light: rgba(16, 185, 129, 0.08);
  --emerald-border: rgba(16, 185, 129, 0.25);
  
  --gradient-emerald: linear-gradient(135deg, #10b981 0%, #047857 100%);
  --gradient-accent: linear-gradient(135deg, #34d399 0%, #059669 100%);
  
  --text-main: #111827;      /* Dark Charcoal */
  --text-muted: #4b5563;     /* Muted Gray-Charcoal */
  --text-dim: #9ca3af;       /* Dim Subtext */
  
  --border-color: #e5e7eb;
  --border-highlight: rgba(16, 185, 129, 0.4);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-card: 0 10px 30px -10px rgba(17, 24, 39, 0.05), 0 4px 6px -4px rgba(17, 24, 39, 0.02);
  --shadow-card-hover: 0 20px 40px -12px rgba(16, 185, 129, 0.15), 0 8px 16px -6px rgba(17, 24, 39, 0.04);
  --shadow-btn: 0 10px 25px -5px rgba(16, 185, 129, 0.35);
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --max-width: 1200px;
}

/* 2. Global Resets */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-family);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* 3. Layout Grid & Utilities */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

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

.text-gradient-cyan {
  background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: var(--emerald-light);
  border: 1px solid var(--emerald-border);
  border-radius: var(--radius-full);
  color: var(--emerald-dark);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.22;
  margin-bottom: 16px;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 650px;
  margin: 0 auto;
}

/* 4. Header & Navigation (Cybersecurity Clean Top Bar) */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  height: 76px;
  display: flex;
  align-items: center;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

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

.brand-icon {
  width: 38px;
  height: 38px;
  background: var(--gradient-emerald);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
}

.brand-icon svg {
  width: 22px;
  height: 22px;
  fill: #ffffff;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 600;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--emerald-hover);
}

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 24px;
  background: var(--gradient-emerald);
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-btn);
  transition: all 0.25s ease;
}

.nav-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(16, 185, 129, 0.45);
}

/* 5. Large Hero Section (Off-white + Emerald Tech Highlights) */
.hero-section {
  padding: 150px 0 95px;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 50% 0%, rgba(16, 185, 129, 0.08) 0%, rgba(248, 250, 252, 0) 70%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-left {
  text-align: left;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 22px;
  letter-spacing: -1.2px;
  color: var(--text-main);
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.65;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.btn-primary-lg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 36px;
  background: var(--gradient-emerald);
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-btn);
  transition: all 0.3s ease;
}

.btn-primary-lg:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 35px rgba(16, 185, 129, 0.45);
}

.btn-secondary-lg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 30px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}

.btn-secondary-lg:hover {
  background: var(--bg-card-hover);
  border-color: var(--emerald-primary);
  color: var(--emerald-dark);
  transform: translateY(-2px);
}

.hero-highlights {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 0.92rem;
  color: var(--text-muted);
  font-weight: 600;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.highlight-item svg {
  width: 18px;
  height: 18px;
  fill: var(--emerald-primary);
}

/* Hero Right: Clean Server-Status Dashboard (Cybersecurity Style) */
.clean-server-dashboard {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 50px -12px rgba(17, 24, 39, 0.08);
  overflow: hidden;
}

.dashboard-header {
  background: #f1f5f9;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.dashboard-title {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.dash-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--emerald-primary);
}

.pulse-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--emerald-primary);
  box-shadow: 0 0 0 rgba(16, 185, 129, 0.4);
  animation: pulse-ring 2s infinite;
}

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

.dashboard-body {
  padding: 24px;
}

.node-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #f8fafc;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: all 0.25s ease;
}

.node-item:hover {
  background: #ffffff;
  border-color: var(--emerald-border);
  box-shadow: var(--shadow-sm);
}

.node-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
}

.node-ping {
  font-size: 0.85rem;
  color: var(--emerald-primary);
  font-weight: 800;
  font-family: monospace;
}

.speed-meter-box {
  background: var(--emerald-light);
  border: 1px solid var(--emerald-border);
  border-radius: var(--radius-md);
  padding: 18px;
  text-align: center;
}

.speed-number {
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1;
  color: var(--emerald-dark);
}

.speed-unit {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--emerald-primary);
}

.speed-progress-track {
  height: 8px;
  background: rgba(16, 185, 129, 0.15);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
  margin-top: 10px;
}

.speed-progress-fill {
  height: 100%;
  background: var(--gradient-emerald);
  border-radius: var(--radius-full);
  width: 92%;
  animation: speed-pulse 3s ease-in-out infinite alternate;
}

@keyframes speed-pulse {
  0% { width: 85%; }
  50% { width: 98%; }
  100% { width: 88%; }
}

/* 6. Modern Statistics Cards Section */
.stats-section {
  padding: 80px 0;
  background: #ffffff;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.stat-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-4px);
  border-color: var(--emerald-border);
  box-shadow: var(--shadow-card-hover);
  background: #ffffff;
}

.stat-number {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -1px;
  color: var(--emerald-primary);
}

.stat-label {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* 7. Feature Cards Section */
.features-section {
  padding: 95px 0;
  background: var(--bg-primary);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-card);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--emerald-border);
  box-shadow: var(--shadow-card-hover);
}

.feature-icon-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--emerald-light);
  border: 1px solid var(--emerald-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--emerald-primary);
}

.feature-icon-box svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-main);
}

.feature-desc {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.65;
}

/* 8. Global Server Locations Section */
.servers-section {
  padding: 95px 0;
  background: #ffffff;
}

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

.server-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.25s ease;
}

.server-card:hover {
  transform: translateY(-3px);
  background: #ffffff;
  border-color: var(--emerald-border);
  box-shadow: var(--shadow-card);
}

.server-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.server-flag {
  font-size: 2rem;
}

.server-name {
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--text-main);
}

.server-detail {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.server-ping-badge {
  padding: 4px 12px;
  background: var(--emerald-light);
  border: 1px solid var(--emerald-border);
  border-radius: var(--radius-full);
  color: var(--emerald-primary);
  font-weight: 800;
  font-size: 0.85rem;
  font-family: monospace;
}

/* 9. Streaming & AI Support Section */
.media-ai-section {
  padding: 95px 0;
  background: var(--bg-primary);
}

.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.category-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-card);
}

.category-header {
  margin-bottom: 20px;
}

.category-tag {
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--emerald-primary);
  margin-bottom: 8px;
  display: block;
}

.category-title {
  font-size: 1.55rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--text-main);
}

.category-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.service-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  transition: all 0.25s ease;
}

.service-chip:hover {
  background: #ffffff;
  border-color: var(--emerald-border);
}

.chip-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--emerald-primary);
}

/* 10. Pricing Section */
.pricing-section {
  padding: 95px 0;
  background: #ffffff;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.price-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all 0.3s ease;
}

.price-card:hover {
  transform: translateY(-6px);
  background: #ffffff;
  box-shadow: var(--shadow-card-hover);
}

.price-card.featured {
  background: #ffffff;
  border: 2px solid var(--emerald-primary);
  box-shadow: 0 15px 35px rgba(16, 185, 129, 0.15);
}

.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-emerald);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 18px;
  border-radius: var(--radius-full);
}

.plan-name {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: var(--text-main);
}

.plan-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.plan-price-box {
  margin-bottom: 28px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--emerald-primary);
}

.price-amount {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-main);
}

.price-period {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.plan-features {
  margin-bottom: 32px;
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-main);
  margin-bottom: 14px;
}

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

.btn-plan {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 14px 20px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 1rem;
  text-align: center;
  transition: all 0.25s ease;
}

.btn-plan-primary {
  background: var(--gradient-emerald);
  color: #fff;
  box-shadow: var(--shadow-btn);
}

.btn-plan-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(16, 185, 129, 0.45);
}

.btn-plan-outline {
  background: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

.btn-plan-outline:hover {
  border-color: var(--emerald-primary);
  color: var(--emerald-primary);
  background: var(--emerald-light);
}

/* 11. SEO Articles Section */
.articles-section {
  padding: 95px 0;
  background: var(--bg-primary);
}

.article-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.25s ease;
  box-shadow: var(--shadow-sm);
}

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

.article-tag-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--emerald-dark);
  background: var(--emerald-light);
  padding: 3px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.article-title-text {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 10px;
  color: var(--text-main);
}

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

.article-read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--emerald-primary);
  font-size: 0.92rem;
  font-weight: 700;
  transition: gap 0.2s ease;
}

.article-read-more:hover {
  gap: 10px;
  color: var(--emerald-hover);
}

/* 12. Reviews Section */
.reviews-section {
  padding: 95px 0;
  background: #ffffff;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.stars {
  color: #f59e0b;
  margin-bottom: 14px;
  font-size: 1.1rem;
}

.review-text {
  color: var(--text-main);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 22px;
  font-style: italic;
}

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

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-emerald);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #fff;
}

.user-name {
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--text-main);
}

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

/* 13. FAQ Section */
.faq-section {
  padding: 95px 0;
  background: var(--bg-primary);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.25s ease;
}

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

.faq-question {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1.05rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-main);
}

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

.faq-arrow {
  width: 20px;
  height: 20px;
  fill: var(--text-muted);
  transition: transform 0.25s ease;
}

details[open] .faq-arrow {
  transform: rotate(180deg);
  fill: var(--emerald-primary);
}

.faq-answer {
  padding: 0 24px 20px 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
  border-top: 1px solid var(--border-color);
  margin-top: 4px;
  padding-top: 14px;
}

/* 14. Final CTA Section (Cybersecurity Emerald Conversion Banner) */
.final-cta-section {
  padding: 95px 0;
  background: var(--gradient-emerald);
  color: #ffffff;
  text-align: center;
}

.final-cta-container {
  max-width: 800px;
  margin: 0 auto;
}

.final-cta-title {
  font-size: 3rem;
  font-weight: 900;
  margin-bottom: 18px;
  line-height: 1.15;
  letter-spacing: -1px;
}

.final-cta-desc {
  font-size: 1.2rem;
  opacity: 0.92;
  margin-bottom: 36px;
  line-height: 1.6;
}

.btn-final-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 18px 44px;
  background: #ffffff;
  color: var(--emerald-dark);
  font-size: 1.15rem;
  font-weight: 900;
  border-radius: var(--radius-full);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
}

.btn-final-cta:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.3);
}

/* 15. Site Footer */
.site-footer {
  background: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  text-align: center;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.footer-nav a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 600;
  transition: color 0.2s ease;
}

.footer-nav a:hover {
  color: var(--emerald-primary);
}

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

/* Subpages Layout */
.subpage-hero {
  padding: 140px 0 50px;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  text-align: center;
}

.subpage-title {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 12px;
  color: var(--text-main);
}

.subpage-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
}

.subpage-body {
  padding: 60px 0 90px;
  max-width: 850px;
  margin: 0 auto;
}

.content-block {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-sm);
}

.content-block h2 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--emerald-primary);
  margin-bottom: 16px;
}

.content-block p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 14px;
}

.content-block ul {
  list-style: disc;
  padding-left: 24px;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.back-home-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--emerald-primary);
  font-weight: 700;
  margin-bottom: 20px;
}

/* 16. Mobile Responsive Media Queries */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-left {
    text-align: center;
  }
  .hero-cta-group, .hero-highlights {
    justify-content: center;
  }
  .hero-title {
    font-size: 2.8rem;
  }
  .grid-3, .server-grid, .pricing-grid, .reviews-grid, .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .media-ai-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .header-nav {
    display: none;
  }
  .hero-title {
    font-size: 2.25rem;
  }
  .section-title {
    font-size: 1.85rem;
  }
  .grid-3, .server-grid, .pricing-grid, .reviews-grid, .stats-grid {
    grid-template-columns: 1fr;
  }
  .footer-nav {
    gap: 18px;
    flex-direction: column;
  }
}