:root {
  --bg-canvas: #070b14;
  --bg-surface: #0d1424;
  --bg-card: #121b2f;
  --bg-card-hover: #17223b;
  --bg-code: #090e1a;
  --border-subtle: rgba(148, 163, 184, 0.14);
  --border-accent: rgba(59, 130, 246, 0.48);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-blue: #2563eb;
  --accent-blue-bright: #3b82f6;
  --accent-cyan: #22d3ee;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --shadow-card: 0 20px 50px -20px rgba(2, 6, 23, 0.85);
  --shadow-glow: 0 0 36px rgba(37, 99, 235, 0.24);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --max-width: 1200px;
  --font-sans: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", Consolas, Monaco, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 8%, rgba(37, 99, 235, 0.14), transparent 36%),
    radial-gradient(circle at 88% 18%, rgba(34, 211, 238, 0.09), transparent 32%),
    var(--bg-canvas);
  color: var(--text-primary);
  overflow-x: hidden;
}

a {
  color: var(--accent-blue-bright);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
  color: var(--accent-cyan);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Reading Progress */
.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
  z-index: 1200;
  transition: width 0.1s linear;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(7, 11, 20, 0.84);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 18px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.28), rgba(37, 99, 235, 0.1));
  border: 1px solid rgba(59, 130, 246, 0.45);
  display: grid;
  place-items: center;
  color: var(--accent-blue-bright);
  box-shadow: 0 0 20px rgba(37, 99, 235, 0.22);
}

.brand-domain {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.1);
  border: 1px solid var(--border-subtle);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.93rem;
  font-weight: 500;
  padding: 8px 13px;
  border-radius: 10px;
  transition: all 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: rgba(148, 163, 184, 0.1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.22s ease, background-color 0.22s ease, border-color 0.22s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  box-shadow: 0 8px 24px -6px rgba(37, 99, 235, 0.65);
}

.btn-primary:hover {
  color: #ffffff;
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  box-shadow: 0 12px 28px -6px rgba(59, 130, 246, 0.75);
}

.btn-outline {
  background: rgba(15, 23, 42, 0.7);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-outline:hover {
  color: var(--text-primary);
  border-color: var(--border-accent);
  background: rgba(30, 41, 59, 0.85);
}

.mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-primary);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

/* Hero Section */
.hero-section {
  position: relative;
  padding: 78px 0 64px;
  overflow: hidden;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse at center, black 35%, transparent 80%);
  pointer-events: none;
}

.hero-layout {
  position: relative;
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: 44px;
  align-items: center;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.14);
  border: 1px solid rgba(59, 130, 246, 0.35);
  color: #93c5fd;
  font-size: 0.82rem;
  font-weight: 500;
  margin-bottom: 18px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulseRing 2s infinite;
}

@keyframes pulseRing {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin: 0 0 18px;
  background: linear-gradient(180deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin: 0 0 26px;
  max-width: 610px;
}

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

.seo-tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.seo-chip {
  font-size: 0.78rem;
  color: var(--text-secondary);
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-subtle);
  padding: 4px 11px;
  border-radius: 999px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.seo-chip:hover {
  border-color: var(--border-accent);
  color: var(--text-primary);
}

/* Dark UI Showcase Card (Inspired by Image 1) */
.hero-ui-panel {
  position: relative;
  background: linear-gradient(160deg, rgba(18, 27, 47, 0.96), rgba(11, 17, 32, 0.98));
  border: 1px solid rgba(59, 130, 246, 0.28);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.ui-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.ui-badge-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ui-square-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: rgba(37, 99, 235, 0.18);
  border: 1px solid rgba(59, 130, 246, 0.35);
  display: grid;
  place-items: center;
}

.ui-square-inner {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  background: var(--accent-blue-bright);
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.8);
}

.telemetry-list {
  display: grid;
  gap: 12px;
  margin-bottom: 20px;
}

.telemetry-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 14px;
  background: rgba(7, 11, 20, 0.65);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  font-size: 0.86rem;
}

.telemetry-node {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--text-primary);
  font-weight: 500;
}

.telemetry-latency {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-emerald);
}

.latency-bar-wrap {
  width: 68px;
  height: 5px;
  background: rgba(148, 163, 184, 0.15);
  border-radius: 999px;
  overflow: hidden;
}

.latency-bar-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-emerald), var(--accent-cyan));
  animation: signalPulse 3.2s ease-in-out infinite;
}

@keyframes signalPulse {
  0%, 100% { opacity: 0.78; transform: scaleX(0.95); transform-origin: left; }
  50% { opacity: 1; transform: scaleX(1); transform-origin: left; }
}

/* Section Headers */
.section-block {
  padding: 72px 0;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 46px;
}

.section-kicker {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 10px;
}

.section-title {
  font-size: clamp(1.6rem, 2.8vw, 2.25rem);
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

.section-desc {
  color: var(--text-secondary);
  margin: 0;
  font-size: 0.98rem;
}

/* Advantages Grid */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 26px;
  transition: transform 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(37, 99, 235, 0.14);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: var(--accent-blue-bright);
  margin-bottom: 16px;
  font-size: 1.2rem;
}

.feature-card h3 {
  margin: 0 0 10px;
  font-size: 1.1rem;
}

.feature-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

/* Pricing Grid (Matching Image 2) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, rgba(16, 24, 42, 0.96), rgba(10, 15, 28, 0.98));
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  transition: transform 0.24s ease, border-color 0.24s ease;
}

.pricing-card:hover {
  transform: translateY(-4px);
}

.pricing-card.featured {
  border-color: rgba(59, 130, 246, 0.65);
  box-shadow: 0 24px 60px -24px rgba(37, 99, 235, 0.45);
  background: linear-gradient(180deg, rgba(20, 32, 58, 0.98), rgba(11, 17, 32, 0.99));
}

.pricing-pill-top {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-blue);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.5);
}

.tier-badge {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.76rem;
  font-weight: 600;
  color: #cbd5e1;
  background: rgba(148, 163, 184, 0.14);
  border: 1px solid var(--border-subtle);
  padding: 3px 10px;
  border-radius: 6px;
  margin-bottom: 12px;
}

.pricing-name {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 0 0 10px;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 22px;
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 700;
}

.price-amount {
  font-size: 2.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.price-unit {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.pricing-features {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  display: grid;
  gap: 11px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.91rem;
  color: #cbd5e1;
}

.check-circle {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1.5px solid rgba(59, 130, 246, 0.7);
  color: var(--accent-blue-bright);
  display: inline-grid;
  place-items: center;
  font-size: 0.68rem;
  flex-shrink: 0;
}

.pricing-addon-strip {
  margin-top: 24px;
  padding: 18px 24px;
  border-radius: var(--radius-md);
  background: rgba(18, 27, 47, 0.72);
  border: 1px dashed rgba(59, 130, 246, 0.35);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.addon-items {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.addon-items strong {
  color: var(--text-primary);
}

/* Dynamic Article Showcase & Ticker */
.article-ticker {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 18px;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  margin-bottom: 24px;
  overflow: hidden;
}

.ticker-label {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-cyan);
  white-space: nowrap;
}

.ticker-track {
  display: flex;
  gap: 32px;
  white-space: nowrap;
  animation: tickerScroll 34s linear infinite;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.ticker-track:hover {
  animation-play-state: paused;
}

@keyframes tickerScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 26px;
}

.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-pill {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 0.84rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-pill:hover,
.filter-pill.active {
  background: rgba(37, 99, 235, 0.2);
  border-color: var(--border-accent);
  color: #ffffff;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.article-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  overflow: hidden;
  transition: transform 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
}

.article-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(360px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(59, 130, 246, 0.14), transparent 45%);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.article-card:hover::before {
  opacity: 1;
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-accent);
  box-shadow: 0 18px 40px -18px rgba(37, 99, 235, 0.4);
}

/* Flagship 10th Card Special Accent */
.article-card.card-flagship {
  border-color: rgba(34, 211, 238, 0.55);
  background: linear-gradient(155deg, rgba(18, 32, 58, 0.96), rgba(11, 18, 34, 0.98));
  box-shadow: 0 0 32px rgba(34, 211, 238, 0.14);
}

.article-card.card-flagship::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), var(--accent-blue-bright), transparent);
  animation: shimmerBeam 4.2s ease-in-out infinite;
}

@keyframes shimmerBeam {
  0% { left: -60%; }
  100% { left: 140%; }
}

.card-top-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.card-tag {
  font-size: 0.74rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.16);
  color: #93c5fd;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.card-flagship .card-tag {
  background: rgba(34, 211, 238, 0.16);
  color: #67e8f9;
  border-color: rgba(34, 211, 238, 0.45);
}

.card-slot {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
}

.article-card h3 {
  font-size: 1.07rem;
  line-height: 1.45;
  margin: 0 0 10px;
}

.article-card h3 a {
  color: var(--text-primary);
}

.article-card h3 a:hover {
  color: var(--accent-cyan);
}

.card-excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin: 0 0 18px;
  flex-grow: 1;
}

.card-stats-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.77rem;
  color: var(--text-muted);
}

/* FAQ 50-Questions Explorer */
.faq-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.search-input {
  min-width: 260px;
  flex: 1;
  max-width: 380px;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
}

.search-input:focus {
  border-color: var(--accent-blue-bright);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item[open] {
  border-color: var(--border-accent);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 20px;
  font-weight: 600;
  font-size: 0.96rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  color: var(--text-primary);
}

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

.faq-chevron {
  color: var(--text-muted);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
  color: var(--accent-cyan);
}

.faq-answer {
  padding: 0 20px 18px;
  color: var(--text-secondary);
  font-size: 0.92rem;
  border-top: 1px solid rgba(148, 163, 184, 0.08);
  padding-top: 12px;
}

/* Article Detail Layout */
.article-shell {
  padding: 42px 0 80px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 22px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 32px;
  align-items: start;
}

.article-main {
  background: rgba(13, 20, 36, 0.9);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.article-main h1 {
  font-size: clamp(1.55rem, 2.6vw, 2.15rem);
  line-height: 1.32;
  margin: 0 0 16px;
}

.article-meta-top {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.84rem;
  color: var(--text-secondary);
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 26px;
}

.article-prose h2 {
  font-size: 1.36rem;
  margin: 34px 0 14px;
  color: #f8fafc;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
}

.article-prose h3 {
  font-size: 1.12rem;
  margin: 24px 0 10px;
  color: #e2e8f0;
}

.article-prose p {
  margin: 0 0 16px;
  color: #cbd5e1;
  font-size: 0.98rem;
}

.article-prose ul {
  margin: 0 0 18px;
  padding-left: 20px;
  color: #cbd5e1;
}

.article-prose li {
  margin-bottom: 8px;
}

.table-wrap {
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  background: var(--bg-code);
}

th, td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

th {
  background: rgba(37, 99, 235, 0.14);
  color: #f8fafc;
  font-weight: 600;
}

td {
  color: #cbd5e1;
}

.code-block-wrap {
  position: relative;
  margin: 22px 0;
  background: var(--bg-code);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  overflow: hidden;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: rgba(30, 41, 59, 0.65);
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.copy-btn {
  background: rgba(37, 99, 235, 0.2);
  color: #93c5fd;
  border: 1px solid rgba(59, 130, 246, 0.35);
  border-radius: 6px;
  padding: 3px 10px;
  font-size: 0.74rem;
  cursor: pointer;
}

.copy-btn:hover {
  background: var(--accent-blue);
  color: #ffffff;
}

pre {
  margin: 0;
  padding: 16px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.83rem;
  line-height: 1.6;
  color: #e2e8f0;
}

/* Article Bottom Stats & Internal Nav */
.article-stats-footer {
  margin-top: 34px;
  padding: 18px 20px;
  border-radius: 12px;
  background: rgba(7, 11, 20, 0.7);
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.84rem;
  color: var(--text-secondary);
}

.stats-items {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.like-btn {
  background: rgba(16, 185, 129, 0.14);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #6ee7b7;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  cursor: pointer;
}

.article-faq-box {
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--border-subtle);
}

.article-faq-box h2 {
  border-bottom: none;
  margin-top: 0;
}

.qa-natural-item {
  padding: 16px 18px;
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  margin-bottom: 12px;
}

.qa-natural-q {
  font-weight: 600;
  color: #f1f5f9;
  margin-bottom: 6px;
}

.qa-natural-a {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.internal-nav-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}

.internal-nav-card {
  display: block;
  padding: 16px;
  border-radius: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.internal-nav-card:hover {
  border-color: var(--border-accent);
}

.internal-nav-label {
  display: block;
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

/* Sidebar */
.article-sidebar {
  position: sticky;
  top: 90px;
  display: grid;
  gap: 20px;
}

.sidebar-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
}

.sidebar-box h3 {
  margin: 0 0 12px;
  font-size: 1rem;
}

.related-list {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.related-list a {
  display: block;
  font-size: 0.87rem;
  color: var(--text-secondary);
  padding: 8px 10px;
  border-radius: 8px;
  background: rgba(7, 11, 20, 0.55);
  border: 1px solid transparent;
}

.related-list a:hover {
  color: var(--text-primary);
  border-color: var(--border-accent);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 46px 0 36px;
  background: rgba(7, 11, 20, 0.92);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 30px;
  margin-bottom: 28px;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
  font-size: 0.88rem;
}

.footer-bottom {
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

@media (max-width: 992px) {
  .hero-layout,
  .advantages-grid,
  .pricing-grid,
  .articles-grid,
  .article-layout,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(7, 11, 20, 0.98);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    padding: 16px 24px;
    align-items: flex-start;
  }

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

  .mobile-toggle {
    display: inline-flex;
  }

  .internal-nav-grid {
    grid-template-columns: 1fr;
  }
}