/* ==========================================================================
   红杏云 - Editorial Control Room + Premium Data Studio + Network Atlas Theme
   Design Style:
   - Editorial Control Room (Precision typography, mono metrics, control panels)
   - Premium Data Studio (Studio radial lighting, dark glassmorphism, sleek data density)
   - Network Atlas (Cartographic node topology, glowing route arcs, live telemetry)
   ========================================================================== */

/* 1. Design Tokens & Color Palette */
:root {
  --bg-dark: #060913;
  --bg-studio: #0b0f1d;
  --bg-card: rgba(15, 22, 41, 0.75);
  --bg-card-hover: rgba(23, 33, 60, 0.85);

  --border-hairline: rgba(255, 255, 255, 0.08);
  --border-studio: rgba(255, 255, 255, 0.12);
  --border-glow: rgba(99, 102, 241, 0.4);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --text-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --accent-purple: #8b5cf6;
  --accent-cyan: #06b6d4;
  --accent-pink: #ec4899;
  --success: #10b981;

  --gradient-brand: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
  --gradient-studio-light: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.18) 0%, rgba(6, 182, 212, 0.08) 45%, transparent 70%);
  --gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0) 100%);
  --grid-pattern: radial-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --max-width: 1240px;

  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: var(--gradient-studio-light), var(--grid-pattern);
  background-size: 100% 100%, 32px 32px;
  background-repeat: no-repeat, repeat;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Monospace Metrics & Telemetry Elements */
.font-mono {
  font-family: var(--text-mono);
}

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

/* Editorial Control Badge */
.control-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0.9rem;
  border-radius: 9999px;
  font-family: var(--text-mono);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: #c7d2fe;
  margin-bottom: 1.5rem;
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.15);
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 10px var(--success);
}

/* 3. Typography & Section Headers */
h1, h2, h3, h4 {
  color: var(--text-main);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem auto;
}

.editorial-tag {
  font-family: var(--text-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.75rem;
  display: block;
}

.section-header h2 {
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* 4. Container & Layout Section */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5.5rem 0;
  position: relative;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

/* 5. Precision Control Room Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.9rem 1.85rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.98rem;
  transition: var(--transition);
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #ffffff;
  box-shadow: 0 4px 25px rgba(99, 102, 241, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(139, 92, 246, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-studio);
  color: var(--text-main);
  backdrop-filter: blur(12px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

/* 6. Header Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(6, 9, 19, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-hairline);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.75rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.03em;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-brand);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 900;
  font-size: 1.15rem;
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.85rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.92rem;
  color: var(--text-muted);
  font-weight: 500;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  height: 24px;
  cursor: pointer;
  padding: 2px;
  z-index: 1001;
}

.mobile-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-main);
  border-radius: 2px;
  transition: var(--transition);
}

/* 7. Hero Section & Network Atlas Studio */
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3.5rem;
  align-items: center;
  padding: 4.5rem 0 3.5rem 0;
}

.hero-content h1 {
  font-size: clamp(2.35rem, 5vw, 3.65rem);
  margin-bottom: 1.25rem;
  line-height: 1.12;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 2.25rem;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Premium Network Atlas Telemetry Studio Card */
.atlas-card {
  background: var(--bg-card);
  border: 1px solid var(--border-studio);
  border-radius: var(--radius-xl);
  padding: 1.85rem;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  position: relative;
  overflow: hidden;
}

.atlas-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-brand);
}

.atlas-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-hairline);
}

.atlas-title {
  font-size: 0.9rem;
  font-family: var(--text-mono);
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--text-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--success);
  background: rgba(16, 185, 129, 0.12);
  padding: 0.3rem 0.75rem;
  border-radius: 9999px;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

/* Cartographic Network Atlas Visual Window */
.atlas-map-container {
  height: 180px;
  width: 100%;
  background: rgba(4, 7, 15, 0.7);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-hairline);
  position: relative;
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.atlas-svg {
  width: 100%;
  height: 100%;
}

.atlas-node-dot {
  fill: var(--accent-cyan);
  filter: drop-shadow(0 0 6px var(--accent-cyan));
  animation: pulse-node 2.5s infinite;
}

.atlas-node-pulse {
  fill: none;
  stroke: var(--primary);
  stroke-width: 1.5;
  animation: ripple 2s cubic-bezier(0, 0.2, 0.8, 1) infinite;
}

@keyframes ripple {
  0% { r: 4px; opacity: 1; }
  100% { r: 24px; opacity: 0; }
}

@keyframes pulse-node {
  0%, 100% { fill: var(--accent-cyan); }
  50% { fill: var(--accent-pink); }
}

.atlas-route-arc {
  stroke: url(#arc-gradient);
  stroke-width: 2;
  stroke-dasharray: 8 4;
  fill: none;
  animation: arc-flow 20s linear infinite;
}

@keyframes arc-flow {
  to { stroke-dashoffset: -240; }
}

.nodes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.node-item {
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 0.75rem 0.9rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.node-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.node-flag {
  font-size: 1.05rem;
}

.node-name {
  font-weight: 600;
  font-size: 0.85rem;
}

.node-ping {
  font-family: var(--text-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--success);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.ping-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
}

.atlas-telemetry-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  text-align: center;
}

.telemetry-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-hairline);
  padding: 0.65rem;
  border-radius: var(--radius-md);
}

.telemetry-value {
  font-family: var(--text-mono);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-main);
}

.telemetry-label {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* 8. Bento Grid & Advantage Cards */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(16px);
}

.bento-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.bento-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #a5b4fc;
  font-size: 1.5rem;
  margin-bottom: 1.35rem;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.bento-card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
}

.bento-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* 9. AI & Streaming Section */
.ai-streaming-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.scenarios-card {
  background: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  backdrop-filter: blur(16px);
}

.scenarios-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1.5rem;
}

.tag-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-hairline);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.feature-list li::before {
  content: "✓";
  color: var(--success);
  font-weight: bold;
}

/* 10. SaaS Pricing Studio Section */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
  backdrop-filter: blur(16px);
}

.pricing-card.featured {
  border-color: var(--primary);
  background: linear-gradient(180deg, rgba(99, 102, 241, 0.15) 0%, rgba(15, 22, 41, 0.9) 100%);
  box-shadow: 0 0 45px rgba(99, 102, 241, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  transform: scale(1.03);
}

.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-brand);
  color: #fff;
  font-family: var(--text-mono);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.3rem 1.1rem;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.pricing-header h3 {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

.price-box {
  margin: 1.5rem 0 1.75rem 0;
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}

.price-currency {
  font-size: 1.35rem;
  font-weight: 600;
}

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

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

.pricing-features {
  list-style: none;
  margin: 1.5rem 0 2rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.pricing-features li {
  font-size: 0.92rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* 11. SEO Articles Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.85rem;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 1.85rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  backdrop-filter: blur(12px);
}

.article-card:hover {
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-4px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.35);
}

.article-category {
  font-family: var(--text-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.article-card h3 {
  font-size: 1.18rem;
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.35rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--text-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  border-top: 1px solid var(--border-hairline);
  padding-top: 0.85rem;
}

/* 12. Testimonials Section */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: 1.85rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.testimonial-content {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1.35rem;
  font-style: italic;
}

.testimonial-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #fff;
  font-size: 0.95rem;
}

.user-info {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-main);
}

.user-role {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* 13. FAQ Accordion Section */
.faq-container {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

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

.faq-button {
  width: 100%;
  padding: 1.35rem 1.65rem;
  text-align: left;
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.faq-icon {
  font-family: var(--text-mono);
  font-size: 1.35rem;
  transition: transform 0.3s ease;
  color: var(--accent-cyan);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 1.65rem;
}

.faq-item.active .faq-content {
  max-height: 500px;
  padding: 0 1.65rem 1.35rem 1.65rem;
}

.faq-content p {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.65;
}

/* 14. Footer Layout & Recommendation Links */
.footer {
  background: #04060d;
  border-top: 1px solid var(--border-hairline);
  padding: 4.5rem 0 2.25rem 0;
  margin-top: 5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 2.75rem;
  margin-bottom: 3.5rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 1rem;
  max-width: 340px;
}

.footer-col h4 {
  font-size: 0.98rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--text-main);
}

.footer-bottom {
  border-top: 1px solid var(--border-hairline);
  padding-top: 2.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.1rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.footer-recommendations {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 0.5rem;
}

.footer-recommendations a {
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-recommendations a:hover {
  color: var(--primary);
  text-decoration: underline;
}

/* 15. Standalone Article / Footer Page Layouts */
.page-header {
  padding: 4rem 0 2rem 0;
  text-align: center;
}

.page-header h1 {
  font-size: clamp(2rem, 4vw, 2.85rem);
  margin-bottom: 1rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 1.75rem;
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: var(--text-main);
}

.article-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 2.25rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(20px);
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #e2e8f0;
}

.article-body h2 {
  font-size: 1.65rem;
  margin: 2.5rem 0 1.1rem 0;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border-hairline);
  color: var(--text-main);
}

.article-body h3 {
  font-size: 1.28rem;
  margin: 1.85rem 0 0.85rem 0;
  color: var(--text-main);
}

.article-body p {
  margin-bottom: 1.35rem;
}

.article-body ul, .article-body ol {
  margin: 1rem 0 1.6rem 1.6rem;
}

.article-body li {
  margin-bottom: 0.55rem;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.75rem 0;
  font-size: 0.95rem;
}

.article-body th, .article-body td {
  padding: 0.85rem 1.1rem;
  border: 1px solid var(--border-hairline);
  text-align: left;
}

.article-body th {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

.cta-box {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.18) 0%, rgba(139, 92, 246, 0.18) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  text-align: center;
  margin: 2.75rem 0;
}

.cta-box h3 {
  font-size: 1.45rem;
  margin-bottom: 0.75rem;
}

.cta-box p {
  color: var(--text-muted);
  margin-bottom: 1.35rem;
}

.related-articles {
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-hairline);
}

.related-articles h3 {
  font-size: 1.35rem;
  margin-bottom: 1.35rem;
}

/* 16. Responsive Breakpoints */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content p {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .bento-grid, .pricing-grid, .articles-grid, .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-card.featured {
    transform: none;
  }

  .ai-streaming-container {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 4.75rem;
    left: 0;
    right: 0;
    background: rgba(6, 9, 19, 0.96);
    backdrop-filter: blur(24px);
    flex-direction: column;
    padding: 1.75rem;
    border-bottom: 1px solid var(--border-hairline);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-toggle {
    display: flex;
  }

  .bento-grid, .pricing-grid, .articles-grid, .testimonials-grid {
    grid-template-columns: 1fr;
  }

  .nodes-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 3.75rem 0;
  }
}

/* Reduced Motion Safeguard */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}