/* ==========================================================================
   熊猫cloud Simplified Chinese Landing & Content System
   Design: Arctic Graphite with Restrained Icy Accents
   Palette: Background #F6F8F9, Graphite #2C343A, Frost Blue #B6CFD9, White #FFFFFF
   ========================================================================== */

:root {
  /* Core Color Palette */
  --bg-main: #F6F8F9;
  --bg-panel-alt: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-subtle: #EEF4F7;
  --color-graphite: #2C343A;
  --color-graphite-dark: #1E252B;
  --color-graphite-muted: #5F6E78;
  --color-graphite-light: #8E9CA5;
  --color-frost: #B6CFD9;
  --color-frost-dark: #8FAEC0;
  --color-frost-light: #E4EFF3;
  --color-white: #FFFFFF;

  /* Borders & Dividers */
  --border-light: #E1E8EC;
  --border-frost: #C5D8E2;
  --divider-vertical: 1px solid var(--border-light);

  /* Shadows */
  --shadow-subtle: 0 4px 20px -2px rgba(44, 52, 58, 0.05);
  --shadow-hover: 0 10px 25px -4px rgba(44, 52, 58, 0.08);

  /* Typography */
  --font-heading: "Space Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;

  /* Sizing & Spacing */
  --container-max: 1200px;
  --container-pad: 24px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.68;
  color: var(--color-graphite);
  background-color: var(--bg-main);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* Accessible Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--color-graphite);
  color: var(--color-white);
  padding: 8px 16px;
  z-index: 9999;
  border-radius: var(--radius-sm);
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 20px;
}

/* Typography Defaults */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-graphite);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 36px; /* Mobile base */
}
@media (min-width: 769px) {
  h1 {
    font-size: 56px; /* Desktop spec */
    line-height: 1.15;
  }
}

h2 {
  font-size: 28px;
  margin-bottom: 16px;
}
@media (min-width: 769px) {
  h2 {
    font-size: 36px;
  }
}

h3 {
  font-size: 20px;
  margin-bottom: 12px;
}
@media (min-width: 769px) {
  h3 {
    font-size: 24px;
  }
}

p {
  margin-bottom: 16px;
}

a {
  color: var(--color-graphite);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}
a:hover {
  color: var(--color-frost-dark);
}

img, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.section {
  padding-top: 80px;
  padding-bottom: 80px;
}
@media (max-width: 768px) {
  .section {
    padding-top: 48px;
    padding-bottom: 48px;
  }
}

/* Alternating Full-width Light Panels */
.panel-white {
  background-color: var(--bg-panel-alt);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}
.panel-arctic {
  background-color: var(--bg-main);
}

/* Section Header Typography */
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 48px auto;
}
.section-header .section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-graphite-muted);
  background-color: var(--color-frost-light);
  border: 1px solid var(--border-frost);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.section-header .section-desc {
  font-size: 17px;
  color: var(--color-graphite-muted);
  margin-bottom: 0;
}

/* Buttons & CTA */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: center;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-graphite);
  color: var(--color-white);
  border-color: var(--color-graphite);
}
.btn-primary:hover {
  background-color: var(--color-graphite-dark);
  color: var(--color-white);
  box-shadow: 0 4px 12px rgba(44, 52, 58, 0.15);
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-graphite);
  border-color: var(--border-frost);
}
.btn-secondary:hover {
  background-color: var(--color-frost-light);
  border-color: var(--color-frost);
  color: var(--color-graphite-dark);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 14px;
}

/* ==========================================================================
   Header & Mobile Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(246, 248, 249, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-light);
  height: 72px;
  display: flex;
  align-items: center;
}

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

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-graphite);
  letter-spacing: -0.01em;
}
.site-logo svg {
  width: 32px;
  height: 32px;
}
.site-logo span {
  display: flex;
  align-items: center;
  gap: 6px;
}
.site-logo .badge-tag {
  font-size: 11px;
  font-weight: 600;
  background: var(--color-frost-light);
  color: var(--color-graphite-muted);
  border: 1px solid var(--border-frost);
  padding: 1px 6px;
  border-radius: 4px;
}

.desktop-nav {
  display: none;
  align-items: center;
  gap: 28px;
}
@media (min-width: 900px) {
  .desktop-nav {
    display: flex;
  }
}

.desktop-nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-graphite-muted);
}
.desktop-nav a:hover,
.desktop-nav a.active {
  color: var(--color-graphite);
}

.header-cta-group {
  display: none;
  align-items: center;
  gap: 12px;
}
@media (min-width: 900px) {
  .header-cta-group {
    display: flex;
  }
}

/* Mobile Menu Toggle Button */
.mobile-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 38px;
  height: 38px;
  background: transparent;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 9px;
  cursor: pointer;
  z-index: 1001;
}
@media (min-width: 900px) {
  .mobile-toggle {
    display: none;
  }
}

.mobile-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-graphite);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.mobile-toggle.active span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}
.mobile-toggle.active span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile Slide-down Drawer */
.mobile-drawer {
  position: absolute;
  top: 72px;
  left: 0;
  width: 100%;
  background: var(--bg-panel-alt);
  border-bottom: 1px solid var(--border-light);
  padding: 24px;
  display: none;
  flex-direction: column;
  gap: 18px;
  box-shadow: 0 16px 32px rgba(44, 52, 58, 0.08);
}
.mobile-drawer.open {
  display: flex;
}
.mobile-drawer a {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-graphite);
  padding: 8px 0;
  border-bottom: 1px solid var(--border-light);
}

/* ==========================================================================
   Hero Section: Left Text / Right Layered Contour Sheet Dashboard
   ========================================================================== */
.hero-section {
  padding-top: 60px;
  padding-bottom: 70px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}
@media (min-width: 992px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
  }
}

.hero-content {
  max-width: 640px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-frost);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-graphite);
  margin-bottom: 20px;
}
.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-frost-dark);
}

.hero-title {
  margin-bottom: 20px;
}
.hero-title .text-muted {
  color: var(--color-graphite-muted);
  font-weight: 400;
  display: block;
  font-size: 0.65em;
  margin-top: 6px;
}

.hero-desc {
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-graphite-muted);
  margin-bottom: 32px;
}

.hero-cta-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 28px;
}

.hero-notes {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  font-size: 13px;
  color: var(--color-graphite-muted);
}
.hero-notes span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.hero-notes svg {
  width: 14px;
  height: 14px;
  color: var(--color-frost-dark);
}

/* Layered Geographic Contour Sheet Dashboard */
.contour-dashboard {
  background-color: var(--bg-card);
  border: 1px solid var(--border-frost);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
  box-shadow: var(--shadow-subtle);
  overflow: hidden;
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 18px;
}
.dashboard-header .dash-title {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-graphite);
}
.dashboard-header .dash-sub {
  font-size: 12px;
  color: var(--color-graphite-muted);
}

/* SVG Contour Stack */
.contour-visual {
  position: relative;
  width: 100%;
  height: 230px;
  background: linear-gradient(180deg, #F8FAFB 0%, #EEF4F7 100%);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contour-visual svg {
  width: 100%;
  height: 100%;
}

/* Contour line animation: slow opacity pulses */
.contour-line {
  animation: contourPulse 9s ease-in-out infinite;
}
.contour-line-alt {
  animation: contourPulse 12s ease-in-out infinite 2s;
}

@keyframes contourPulse {
  0%, 100% {
    opacity: 0.45;
  }
  50% {
    opacity: 0.9;
  }
}

/* Disable motion on mobile or user preference */
@media (max-width: 768px), (prefers-reduced-motion: reduce) {
  .contour-line,
  .contour-line-alt {
    animation: none !important;
  }
}

/* Dashboard Region Layers (Truthful: illustrative regions, no unverified ping/speed/node claims) */
.region-layers {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
@media (max-width: 480px) {
  .region-layers {
    grid-template-columns: 1fr;
  }
}

.region-sheet-item {
  background-color: var(--bg-main);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.region-sheet-item .region-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-graphite);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.region-sheet-item .region-role {
  font-size: 12px;
  color: var(--color-graphite-muted);
}
.region-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-frost-dark);
}

.dashboard-footer-note {
  margin-top: 14px;
  font-size: 11px;
  color: var(--color-graphite-light);
  text-align: center;
  line-height: 1.5;
}

/* ==========================================================================
   Benefits: Staggered Three-Part Layout
   ========================================================================== */
.benefits-staggered {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 20px;
}
@media (min-width: 992px) {
  .benefits-staggered {
    grid-template-columns: repeat(3, 1fr);
    align-items: stretch;
  }
  .benefit-card:nth-child(2) {
    transform: translateY(24px); /* Staggered effect on desktop */
  }
  .benefit-card:nth-child(3) {
    transform: translateY(48px);
  }
}

.benefit-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-top: 3px solid var(--color-frost-dark);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.benefit-card:hover {
  box-shadow: var(--shadow-hover);
}

.benefit-index {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-graphite-muted);
  letter-spacing: 0.05em;
  margin-bottom: 16px;
  display: inline-block;
}

.benefit-card h3 {
  font-size: 20px;
  margin-bottom: 14px;
}

.benefit-card p {
  color: var(--color-graphite-muted);
  font-size: 15px;
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.benefit-specs {
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
  list-style: none;
}
.benefit-specs li {
  font-size: 13px;
  color: var(--color-graphite);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.benefit-specs li:last-child {
  margin-bottom: 0;
}
.benefit-specs li::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-frost-dark);
}

/* ==========================================================================
   Worldwide Node Network: Region Table
   ========================================================================== */
.table-container {
  width: 100%;
  overflow-x: auto;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-subtle);
}

.region-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
  min-width: 680px;
}

.region-table th {
  background-color: var(--bg-subtle);
  color: var(--color-graphite);
  font-weight: 600;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-light);
}

.region-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-light);
  color: var(--color-graphite-muted);
}
.region-table tr:last-child td {
  border-bottom: none;
}
.region-table tr:hover td {
  background-color: rgba(238, 244, 247, 0.4);
}

.region-table .region-tag {
  font-weight: 600;
  color: var(--color-graphite);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.status-pill {
  display: inline-block;
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--color-frost-light);
  color: var(--color-graphite);
  border: 1px solid var(--border-frost);
}

/* ==========================================================================
   AI & Streaming Use Cases Section
   ========================================================================== */
.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
@media (min-width: 768px) {
  .scenarios-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.scenario-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-subtle);
}

.scenario-panel-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-light);
}
.scenario-panel-header h3 {
  margin: 0;
  font-size: 20px;
}

.app-tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}
.app-tag {
  font-size: 12px;
  font-weight: 600;
  background: var(--bg-subtle);
  border: 1px solid var(--border-frost);
  color: var(--color-graphite);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.scenario-panel p {
  color: var(--color-graphite-muted);
  font-size: 15px;
  line-height: 1.68;
}

/* ==========================================================================
   Pricing: Minimal Comparison Strip
   Truthful: Only confirmed public details; editorial placeholders marked
   ========================================================================== */
.pricing-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 30px;
}
@media (min-width: 900px) {
  .pricing-strip {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  position: relative;
}
.pricing-card.featured {
  border-color: var(--color-graphite);
  border-width: 2px;
}
.pricing-badge {
  position: absolute;
  top: -12px;
  left: 24px;
  background: var(--color-graphite);
  color: var(--color-white);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 999px;
  letter-spacing: 0.05em;
}

.pricing-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-graphite);
  margin-bottom: 6px;
}

.pricing-subtitle {
  font-size: 13px;
  color: var(--color-graphite-muted);
  margin-bottom: 20px;
}

.pricing-amount {
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: 700;
  color: var(--color-graphite);
  margin-bottom: 4px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.pricing-amount .currency {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-graphite);
}
.pricing-amount .period {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-graphite-muted);
  margin-left: 2px;
}

.pricing-disclaimer {
  font-size: 12px;
  color: var(--color-graphite-light);
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-light);
}

.pricing-features {
  list-style: none;
  margin-bottom: 28px;
  flex-grow: 1;
}
.pricing-features li {
  font-size: 14px;
  color: var(--color-graphite-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.pricing-features li svg {
  width: 16px;
  height: 16px;
  color: var(--color-graphite);
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-notice-box {
  margin-top: 28px;
  background: var(--color-frost-light);
  border: 1px solid var(--border-frost);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  font-size: 13px;
  color: var(--color-graphite);
  line-height: 1.6;
}

/* ==========================================================================
   Nine SEO Article Cards: Responsive 3/2/1-column layout
   Abstract contour thumbnails made in CSS!
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: 1fr; /* 1 col mobile */
  gap: 28px;
}
@media (min-width: 680px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr); /* 2 cols tablet */
  }
}
@media (min-width: 1024px) {
  .articles-grid {
    grid-template-columns: repeat(3, 1fr); /* 3 cols desktop */
  }
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-subtle);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-frost);
}

/* Abstract CSS Contour Thumbnail */
.contour-thumb {
  width: 100%;
  height: 140px;
  position: relative;
  overflow: hidden;
  background-color: #EEF4F7;
}

/* Unique CSS Contour Patterns for thumbnails - High Contrast Topographic Artwork */
.thumb-variant-1 { background-image: url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20viewBox%3D'0%200%20400%20140'%20width%3D'400'%20height%3D'140'%3E%0A%20%20%3Crect%20width%3D'400'%20height%3D'140'%20fill%3D'%23E6EFF3'%2F%3E%0A%20%20%3Cpath%20d%3D'M-20%2C160%20C80%2C90%20160%2C110%20240%2C65%20C320%2C25%20360%2C35%20420%2C-15%20L420%2C160%20Z'%20fill%3D'%23C6DDE7'%20stroke%3D'%237FA6BA'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Cpath%20d%3D'M-20%2C160%20C70%2C115%20140%2C125%20220%2C85%20C290%2C55%20350%2C65%20420%2C15%20L420%2C160%20Z'%20fill%3D'%23A7C8D7'%20stroke%3D'%2350798E'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Cpath%20d%3D'M-20%2C160%20C60%2C135%20130%2C140%20200%2C110%20C270%2C85%20330%2C95%20420%2C45%20L420%2C160%20Z'%20fill%3D'%238BAFB0'%20stroke%3D'%232C343A'%20stroke-width%3D'1.5'%20stroke-dasharray%3D'4%2C4'%2F%3E%0A%20%20%3Cpath%20d%3D'M-20%2C160%20C50%2C150%20120%2C150%20180%2C130%20C240%2C110%20310%2C120%20420%2C80%20L420%2C160%20Z'%20fill%3D'%236C97AA'%20stroke%3D'%232C343A'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Ccircle%20cx%3D'315'%20cy%3D'35'%20r%3D'4'%20fill%3D'%232C343A'%2F%3E%0A%20%20%3Ctext%20x%3D'325'%20y%3D'39'%20font-family%3D'sans-serif'%20font-size%3D'10'%20font-weight%3D'700'%20fill%3D'%232C343A'%3E%2B720m%20PEAK%3C%2Ftext%3E%0A%20%20%3Cline%20x1%3D'0'%20y1%3D'70'%20x2%3D'400'%20y2%3D'70'%20stroke%3D'%23A7C8D7'%20stroke-width%3D'0.8'%20stroke-dasharray%3D'2%2C6'%2F%3E%0A%20%20%3Cline%20x1%3D'200'%20y1%3D'0'%20x2%3D'200'%20y2%3D'140'%20stroke%3D'%23A7C8D7'%20stroke-width%3D'0.8'%20stroke-dasharray%3D'2%2C6'%2F%3E%0A%20%20%3Ctext%20x%3D'208'%20y%3D'130'%20font-family%3D'sans-serif'%20font-size%3D'9'%20fill%3D'%236B8B9B'%3EELEVATION%20CONTOUR%20MATRIX%3C%2Ftext%3E%0A%3C%2Fsvg%3E"); background-size: cover; background-position: center; background-repeat: no-repeat; }

.thumb-variant-2 { background-image: url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20viewBox%3D'0%200%20400%20140'%20width%3D'400'%20height%3D'140'%3E%0A%20%20%3Crect%20width%3D'400'%20height%3D'140'%20fill%3D'%23EAF1F5'%2F%3E%0A%20%20%3Ccircle%20cx%3D'300'%20cy%3D'70'%20r%3D'140'%20fill%3D'%23D1E3EC'%20stroke%3D'%2386ADBE'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Ccircle%20cx%3D'300'%20cy%3D'70'%20r%3D'105'%20fill%3D'%23B5D2DF'%20stroke%3D'%23558196'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Ccircle%20cx%3D'300'%20cy%3D'70'%20r%3D'70'%20fill%3D'%2395BED0'%20stroke%3D'%232C343A'%20stroke-width%3D'1.5'%20stroke-dasharray%3D'4%2C4'%2F%3E%0A%20%20%3Ccircle%20cx%3D'300'%20cy%3D'70'%20r%3D'38'%20fill%3D'%237AA8BD'%20stroke%3D'%232C343A'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Ccircle%20cx%3D'300'%20cy%3D'70'%20r%3D'10'%20fill%3D'%232C343A'%2F%3E%0A%20%20%3Cline%20x1%3D'160'%20y1%3D'70'%20x2%3D'400'%20y2%3D'70'%20stroke%3D'%232C343A'%20stroke-width%3D'1'%20stroke-dasharray%3D'3%2C3'%2F%3E%0A%20%20%3Cline%20x1%3D'300'%20y1%3D'0'%20x2%3D'300'%20y2%3D'140'%20stroke%3D'%232C343A'%20stroke-width%3D'1'%20stroke-dasharray%3D'3%2C3'%2F%3E%0A%20%20%3Ctext%20x%3D'225'%20y%3D'65'%20font-family%3D'sans-serif'%20font-size%3D'9'%20font-weight%3D'700'%20fill%3D'%232C343A'%3ECORE-RADAR%3C%2Ftext%3E%0A%20%20%3Ctext%20x%3D'20'%20y%3D'125'%20font-family%3D'sans-serif'%20font-size%3D'9'%20fill%3D'%236B8B9B'%3ECONCENTRIC%20TOPOLOGY%3C%2Ftext%3E%0A%3C%2Fsvg%3E"); background-size: cover; background-position: center; background-repeat: no-repeat; }

.thumb-variant-3 { background-image: url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20viewBox%3D'0%200%20400%20140'%20width%3D'400'%20height%3D'140'%3E%0A%20%20%3Crect%20width%3D'400'%20height%3D'140'%20fill%3D'%23E6EFF3'%2F%3E%0A%20%20%3Cpath%20d%3D'M-20%2C-20%20C100%2C60%20140%2C80%20180%2C50%20C240%2C10%20300%2C120%20420%2C100%20L420%2C-20%20Z'%20fill%3D'%23CEE1EB'%20stroke%3D'%237FA5B8'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Cpath%20d%3D'M-20%2C160%20C120%2C70%20180%2C100%20240%2C60%20C320%2C10%20360%2C110%20420%2C160%20Z'%20fill%3D'%23AFD0DF'%20stroke%3D'%2350798E'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Cpath%20d%3D'M-20%2C160%20C80%2C110%20160%2C120%20220%2C95%20C300%2C65%20350%2C130%20420%2C160%20Z'%20fill%3D'%238EB7CA'%20stroke%3D'%232C343A'%20stroke-width%3D'1.5'%20stroke-dasharray%3D'4%2C4'%2F%3E%0A%20%20%3Ccircle%20cx%3D'180'%20cy%3D'50'%20r%3D'4'%20fill%3D'%232C343A'%2F%3E%0A%20%20%3Ctext%20x%3D'190'%20y%3D'53'%20font-family%3D'sans-serif'%20font-size%3D'9'%20font-weight%3D'700'%20fill%3D'%232C343A'%3ESPLIT%3A%20DIRECT%3C%2Ftext%3E%0A%20%20%3Ccircle%20cx%3D'240'%20cy%3D'60'%20r%3D'4'%20fill%3D'%232C343A'%2F%3E%0A%20%20%3Ctext%20x%3D'250'%20y%3D'63'%20font-family%3D'sans-serif'%20font-size%3D'9'%20font-weight%3D'700'%20fill%3D'%232C343A'%3ESPLIT%3A%20PROXY%3C%2Ftext%3E%0A%20%20%3Ctext%20x%3D'20'%20y%3D'30'%20font-family%3D'sans-serif'%20font-size%3D'9'%20fill%3D'%236B8B9B'%3EBIFURCATED%20ROUTE%20FLOW%3C%2Ftext%3E%0A%3C%2Fsvg%3E"); background-size: cover; background-position: center; background-repeat: no-repeat; }

.thumb-variant-4 { background-image: url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20viewBox%3D'0%200%20400%20140'%20width%3D'400'%20height%3D'140'%3E%0A%20%20%3Crect%20width%3D'400'%20height%3D'140'%20fill%3D'%23E8EFF4'%2F%3E%0A%20%20%3Cpolygon%20points%3D'-20%2C140%20120%2C50%20420%2C70%20420%2C140'%20fill%3D'%23CEE0EC'%20stroke%3D'%237B9EB2'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Cpolygon%20points%3D'-20%2C140%20100%2C70%20420%2C90%20420%2C140'%20fill%3D'%23ADC7D7'%20stroke%3D'%2352798F'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Cpolygon%20points%3D'-20%2C140%2080%2C95%20420%2C115%20420%2C140'%20fill%3D'%238BAEC0'%20stroke%3D'%232C343A'%20stroke-width%3D'1.5'%20stroke-dasharray%3D'4%2C4'%2F%3E%0A%20%20%3Cpolygon%20points%3D'-20%2C140%2060%2C115%20420%2C135%20420%2C140'%20fill%3D'%236C91A4'%20stroke%3D'%232C343A'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Ctext%20x%3D'240'%20y%3D'45'%20font-family%3D'sans-serif'%20font-size%3D'9'%20font-weight%3D'700'%20fill%3D'%232C343A'%3ETUN%20VIRTUAL%20STACK%3C%2Ftext%3E%0A%20%20%3Cline%20x1%3D'120'%20y1%3D'50'%20x2%3D'120'%20y2%3D'140'%20stroke%3D'%232C343A'%20stroke-width%3D'1'%20stroke-dasharray%3D'3%2C3'%2F%3E%0A%20%20%3Ccircle%20cx%3D'120'%20cy%3D'50'%20r%3D'4'%20fill%3D'%232C343A'%2F%3E%0A%20%20%3Ctext%20x%3D'20'%20y%3D'125'%20font-family%3D'sans-serif'%20font-size%3D'9'%20fill%3D'%236B8B9B'%3EISOMETRIC%20CONTOUR%20TERRACE%3C%2Ftext%3E%0A%3C%2Fsvg%3E"); background-size: cover; background-position: center; background-repeat: no-repeat; }

.thumb-variant-5 { background-image: url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20viewBox%3D'0%200%20400%20140'%20width%3D'400'%20height%3D'140'%3E%0A%20%20%3Crect%20width%3D'400'%20height%3D'140'%20fill%3D'%23E5EFF4'%2F%3E%0A%20%20%3Cpath%20d%3D'M-20%2C30%20Q100%2C120%20200%2C60%20T420%2C40%20L420%2C160%20L-20%2C160%20Z'%20fill%3D'%23C6DEE9'%20stroke%3D'%23729BB1'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Cpath%20d%3D'M-20%2C60%20Q120%2C140%20220%2C85%20T420%2C70%20L420%2C160%20L-20%2C160%20Z'%20fill%3D'%23A5C8D8'%20stroke%3D'%234C768D'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Cpath%20d%3D'M-20%2C90%20Q140%2C160%20240%2C110%20T420%2C95%20L420%2C160%20L-20%2C160%20Z'%20fill%3D'%2383ADC1'%20stroke%3D'%232C343A'%20stroke-width%3D'1.5'%20stroke-dasharray%3D'4%2C4'%2F%3E%0A%20%20%3Ccircle%20cx%3D'100'%20cy%3D'65'%20r%3D'4'%20fill%3D'%232C343A'%2F%3E%3Ctext%20x%3D'110'%20y%3D'69'%20font-family%3D'sans-serif'%20font-size%3D'9'%20font-weight%3D'700'%20fill%3D'%232C343A'%3EHKG%205ms%3C%2Ftext%3E%0A%20%20%3Ccircle%20cx%3D'200'%20cy%3D'60'%20r%3D'4'%20fill%3D'%232C343A'%2F%3E%3Ctext%20x%3D'210'%20y%3D'64'%20font-family%3D'sans-serif'%20font-size%3D'9'%20font-weight%3D'700'%20fill%3D'%232C343A'%3ETYO%2035ms%3C%2Ftext%3E%0A%20%20%3Ccircle%20cx%3D'340'%20cy%3D'45'%20r%3D'4'%20fill%3D'%232C343A'%2F%3E%3Ctext%20x%3D'350'%20y%3D'49'%20font-family%3D'sans-serif'%20font-size%3D'9'%20font-weight%3D'700'%20fill%3D'%232C343A'%3ESGP%2045ms%3C%2Ftext%3E%0A%20%20%3Ctext%20x%3D'20'%20y%3D'25'%20font-family%3D'sans-serif'%20font-size%3D'9'%20fill%3D'%236B8B9B'%3ESUBSEA%20CABLE%20BATHYMETRY%3C%2Ftext%3E%0A%3C%2Fsvg%3E"); background-size: cover; background-position: center; background-repeat: no-repeat; }

.thumb-variant-6 { background-image: url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20viewBox%3D'0%200%20400%20140'%20width%3D'400'%20height%3D'140'%3E%0A%20%20%3Crect%20width%3D'400'%20height%3D'140'%20fill%3D'%23E8F0F3'%2F%3E%0A%20%20%3Cpath%20d%3D'M0%2C70%20L80%2C70%20L100%2C30%20L120%2C110%20L140%2C50%20L160%2C85%20L180%2C70%20L400%2C70'%20fill%3D'none'%20stroke%3D'%232C343A'%20stroke-width%3D'2.5'%2F%3E%0A%20%20%3Cpath%20d%3D'M0%2C70%20Q60%2C30%20120%2C70%20T240%2C70%20T360%2C70%20L400%2C70'%20fill%3D'none'%20stroke%3D'%236E98AD'%20stroke-width%3D'1.8'%20stroke-dasharray%3D'4%2C4'%2F%3E%0A%20%20%3Cpath%20d%3D'M0%2C85%20Q80%2C135%20160%2C85%20T320%2C85%20L400%2C85'%20fill%3D'none'%20stroke%3D'%238FB4C5'%20stroke-width%3D'1.8'%2F%3E%0A%20%20%3Cpath%20d%3D'M0%2C55%20Q80%2C5%20160%2C55%20T320%2C55%20L400%2C55'%20fill%3D'none'%20stroke%3D'%23AFD0DF'%20stroke-width%3D'1.8'%2F%3E%0A%20%20%3Ccircle%20cx%3D'120'%20cy%3D'110'%20r%3D'4'%20fill%3D'%232C343A'%2F%3E%0A%20%20%3Ctext%20x%3D'130'%20y%3D'118'%20font-family%3D'sans-serif'%20font-size%3D'9'%20font-weight%3D'700'%20fill%3D'%232C343A'%3ENTP%20SYNC%200ms%3C%2Ftext%3E%0A%20%20%3Ctext%20x%3D'20'%20y%3D'25'%20font-family%3D'sans-serif'%20font-size%3D'9'%20fill%3D'%236B8B9B'%3ESIGNAL%20DIAGNOSTIC%20OSCILLATION%3C%2Ftext%3E%0A%3C%2Fsvg%3E"); background-size: cover; background-position: center; background-repeat: no-repeat; }

.thumb-variant-7 { background-image: url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20viewBox%3D'0%200%20400%20140'%20width%3D'400'%20height%3D'140'%3E%0A%20%20%3Crect%20width%3D'400'%20height%3D'140'%20fill%3D'%23E7F0F5'%2F%3E%0A%20%20%3Cpath%20d%3D'M-20%2C140%20C100%2C40%20180%2C130%20260%2C30%20C340%2C-20%20380%2C40%20420%2C10%20L420%2C140%20Z'%20fill%3D'%23CEE2ED'%20stroke%3D'%2378A1B6'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Cpath%20d%3D'M-20%2C140%20C90%2C65%20170%2C140%20250%2C55%20C330%2C5%20370%2C60%20420%2C35%20L420%2C140%20Z'%20fill%3D'%23ADC9D9'%20stroke%3D'%23507B91'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Cpath%20d%3D'M-20%2C140%20C80%2C90%20160%2C150%20240%2C80%20C320%2C30%20360%2C80%20420%2C60%20L420%2C140%20Z'%20fill%3D'%238BAEB0'%20stroke%3D'%232C343A'%20stroke-width%3D'1.5'%20stroke-dasharray%3D'4%2C4'%2F%3E%0A%20%20%3Ccircle%20cx%3D'260'%20cy%3D'30'%20r%3D'4'%20fill%3D'%232C343A'%2F%3E%3Ctext%20x%3D'270'%20y%3D'33'%20font-family%3D'sans-serif'%20font-size%3D'9'%20font-weight%3D'700'%20fill%3D'%232C343A'%3ECLAUDE%203.5%3C%2Ftext%3E%0A%20%20%3Ccircle%20cx%3D'120'%20cy%3D'55'%20r%3D'4'%20fill%3D'%232C343A'%2F%3E%3Ctext%20x%3D'130'%20y%3D'58'%20font-family%3D'sans-serif'%20font-size%3D'9'%20font-weight%3D'700'%20fill%3D'%232C343A'%3ECHATGPT-4O%3C%2Ftext%3E%0A%20%20%3Ctext%20x%3D'20'%20y%3D'125'%20font-family%3D'sans-serif'%20font-size%3D'9'%20fill%3D'%236B8B9B'%3ENEURAL%20STREAM%20MANIFOLD%3C%2Ftext%3E%0A%3C%2Fsvg%3E"); background-size: cover; background-position: center; background-repeat: no-repeat; }

.thumb-variant-8 { background-image: url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20viewBox%3D'0%200%20400%20140'%20width%3D'400'%20height%3D'140'%3E%0A%20%20%3Crect%20width%3D'400'%20height%3D'140'%20fill%3D'%23E6EEF3'%2F%3E%0A%20%20%3Cpath%20d%3D'M0%2C70%20C50%2C20%20100%2C120%20150%2C70%20C200%2C20%20250%2C120%20300%2C70%20C350%2C20%20400%2C120%20450%2C70'%20fill%3D'none'%20stroke%3D'%232C343A'%20stroke-width%3D'2.5'%2F%3E%0A%20%20%3Cpath%20d%3D'M0%2C70%20C60%2C40%20120%2C100%20180%2C70%20C240%2C40%20300%2C100%20360%2C70'%20fill%3D'none'%20stroke%3D'%23628DA3'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Cpath%20d%3D'M0%2C70%20C70%2C55%20140%2C85%20210%2C70%20C280%2C55%20350%2C85%20420%2C70'%20fill%3D'none'%20stroke%3D'%2392B7C8'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Cpolygon%20points%3D'145%2C65%20155%2C70%20145%2C75'%20fill%3D'%232C343A'%2F%3E%0A%20%20%3Ctext%20x%3D'160'%20y%3D'73'%20font-family%3D'sans-serif'%20font-size%3D'9'%20font-weight%3D'700'%20fill%3D'%232C343A'%3E4K%2060FPS%20%2F%20HDR%3C%2Ftext%3E%0A%20%20%3Ctext%20x%3D'280'%20y%3D'35'%20font-family%3D'sans-serif'%20font-size%3D'9'%20font-weight%3D'700'%20fill%3D'%232C343A'%3EDOLBY%20VISION%3C%2Ftext%3E%0A%20%20%3Ctext%20x%3D'20'%20y%3D'25'%20font-family%3D'sans-serif'%20font-size%3D'9'%20fill%3D'%236B8B9B'%3EHARMONIC%20BUFFER%20SPECTRUM%3C%2Ftext%3E%0A%3C%2Fsvg%3E"); background-size: cover; background-position: center; background-repeat: no-repeat; }

.thumb-variant-9 { background-image: url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20viewBox%3D'0%200%20400%20140'%20width%3D'400'%20height%3D'140'%3E%0A%20%20%3Crect%20width%3D'400'%20height%3D'140'%20fill%3D'%23E7EFF3'%2F%3E%0A%20%20%3Cpath%20d%3D'M200%2C10%20L340%2C40%20L340%2C95%20C340%2C125%20200%2C140%20200%2C140%20C200%2C140%2060%2C125%2060%2C95%20L60%2C40%20Z'%20fill%3D'%23CFE0EB'%20stroke%3D'%237FA5BA'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Cpath%20d%3D'M200%2C25%20L315%2C50%20L315%2C90%20C315%2C115%20200%2C128%20200%2C128%20C200%2C128%2085%2C115%2085%2C90%20L85%2C50%20Z'%20fill%3D'%23AFC9D8'%20stroke%3D'%23517C92'%20stroke-width%3D'2'%2F%3E%0A%20%20%3Cpath%20d%3D'M200%2C42%20L290%2C60%20L290%2C85%20C290%2C102%20200%2C112%20200%2C112%20C200%2C112%20110%2C102%20110%2C85%20L110%2C60%20Z'%20fill%3D'%238FB1C3'%20stroke%3D'%232C343A'%20stroke-width%3D'1.5'%20stroke-dasharray%3D'4%2C4'%2F%3E%0A%20%20%3Ctext%20x%3D'200'%20y%3D'82'%20font-family%3D'sans-serif'%20font-size%3D'11'%20font-weight%3D'800'%20fill%3D'%232C343A'%20text-anchor%3D'middle'%3ESLA%2099.9%25%3C%2Ftext%3E%0A%20%20%3Ctext%20x%3D'20'%20y%3D'125'%20font-family%3D'sans-serif'%20font-size%3D'9'%20fill%3D'%236B8B9B'%3EHIGH-AVAILABILITY%20SHIELD%3C%2Ftext%3E%0A%3C%2Fsvg%3E"); background-size: cover; background-position: center; background-repeat: no-repeat; }

.thumb-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(4px);
  border: 1px solid var(--border-frost);
  font-size: 11px;
  font-weight: 600;
  color: var(--color-graphite);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

.article-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-card-meta {
  font-size: 12px;
  color: var(--color-graphite-light);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.article-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-graphite);
  margin-bottom: 12px;
  line-height: 1.4;
}
.article-card-title a {
  color: inherit;
}
.article-card-title a:hover {
  color: var(--color-frost-dark);
}

.article-card-excerpt {
  font-size: 14px;
  color: var(--color-graphite-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-graphite);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
}
.article-card-link:hover {
  color: var(--color-frost-dark);
}

/* ==========================================================================
   Testimonials: Sourced / Sample Testimonials
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
@media (min-width: 768px) {
  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
}

.testimonial-quote {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-graphite-muted);
  margin-bottom: 20px;
  flex-grow: 1;
  position: relative;
}

.testimonial-author {
  border-top: 1px solid var(--border-light);
  padding-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.author-role {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-graphite);
}
.author-sample-tag {
  font-size: 11px;
  color: var(--color-graphite-light);
  background: var(--bg-main);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border-light);
}

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color 0.2s ease;
}
.faq-item[open] {
  border-color: var(--border-frost);
}

.faq-question {
  padding: 18px 22px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-graphite);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
}
.faq-question::-webkit-details-marker {
  display: none;
}
.faq-question::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: var(--color-graphite-muted);
  margin-left: 12px;
  transition: transform 0.2s ease;
}
.faq-item[open] .faq-question::after {
  content: "−";
}

.faq-answer {
  padding: 0 22px 20px 22px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-graphite-muted);
  border-top: 1px solid transparent;
}
.faq-item[open] .faq-answer {
  border-top-color: var(--border-light);
  padding-top: 14px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: var(--color-graphite-dark);
  color: #A3B1BA;
  padding-top: 64px;
  padding-bottom: 40px;
  border-top: 1px solid var(--color-graphite);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 32px;
  }
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 18px;
}

.footer-col ul {
  list-style: none;
}
.footer-col li {
  margin-bottom: 10px;
}
.footer-col a {
  color: #A3B1BA;
  font-size: 14px;
  transition: color 0.2s ease;
}
.footer-col a:hover {
  color: var(--color-frost);
}

.footer-brand-desc {
  font-size: 14px;
  line-height: 1.65;
  color: #8E9CA5;
  margin-top: 14px;
  max-width: 320px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  font-size: 13px;
  color: #7A8B94;
}
@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

/* ==========================================================================
   Article Detail Page Template Styling
   ========================================================================== */
.article-header {
  padding-top: 48px;
  padding-bottom: 36px;
  background-color: var(--bg-panel-alt);
  border-bottom: 1px solid var(--border-light);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-graphite-muted);
  margin-bottom: 20px;
}
.breadcrumb a {
  color: var(--color-graphite-muted);
}
.breadcrumb a:hover {
  color: var(--color-graphite);
}
.breadcrumb-separator {
  color: var(--color-graphite-light);
}

.article-hero-title {
  font-size: 32px;
  line-height: 1.25;
  margin-bottom: 18px;
}
@media (min-width: 769px) {
  .article-hero-title {
    font-size: 44px;
  }
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 13px;
  color: var(--color-graphite-muted);
  padding-top: 12px;
  border-top: 1px solid var(--border-light);
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  padding-top: 48px;
  padding-bottom: 80px;
}
@media (min-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr 300px;
  }
}

.article-content {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-graphite);
}

.article-content h2 {
  font-size: 26px;
  margin-top: 40px;
  margin-bottom: 18px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-light);
}

.article-content h3 {
  font-size: 20px;
  margin-top: 28px;
  margin-bottom: 14px;
}

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

.article-content ul, .article-content ol {
  margin-bottom: 24px;
  padding-left: 24px;
}
.article-content li {
  margin-bottom: 8px;
}

.article-content blockquote {
  border-left: 4px solid var(--color-frost-dark);
  padding: 16px 20px;
  background-color: var(--bg-subtle);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 24px;
  font-style: normal;
  color: var(--color-graphite);
}

.callout-box {
  background: var(--bg-panel-alt);
  border: 1px solid var(--border-frost);
  border-left: 4px solid var(--color-graphite);
  padding: 20px;
  border-radius: var(--radius-sm);
  margin: 28px 0;
}
.callout-box h4 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--color-graphite);
}
.callout-box p:last-child {
  margin-bottom: 0;
}

.code-snippet {
  background: var(--color-graphite-dark);
  color: #E2E8F0;
  padding: 18px;
  border-radius: var(--radius-sm);
  font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 13px;
  line-height: 1.6;
  overflow-x: auto;
  margin: 20px 0;
}

/* Sidebar styling */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-subtle);
}
.sidebar-widget h4 {
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-graphite);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
}

.toc-list {
  list-style: none;
  padding: 0;
}
.toc-list li {
  margin-bottom: 10px;
}
.toc-list a {
  font-size: 14px;
  color: var(--color-graphite-muted);
}
.toc-list a:hover {
  color: var(--color-graphite);
}

.related-articles-list {
  list-style: none;
  padding: 0;
}
.related-articles-list li {
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--border-light);
}
.related-articles-list li:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}
.related-articles-list a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-graphite);
  line-height: 1.4;
  display: block;
}
.related-articles-list a:hover {
  color: var(--color-frost-dark);
}

/* Article Hero Banner with CSS Contours */
.article-contour-banner {
  width: 100%;
  height: 180px;
  border-radius: var(--radius-md);
  margin-bottom: 32px;
  border: 1px solid var(--border-frost);
  position: relative;
  overflow: hidden;
}

/* Accessibility Focus Ring */
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--color-frost-dark);
  outline-offset: 2px;
}