/* ===================================================================
   闪电猫机场官网 - 纯黑白极简动态美学 (Monochrome Aesthetic)
   Domain: speedcatjic.homes
   Official Target: https://jichangbaike.speedworldaff.cc/#/?code=I2HIRA2q
=================================================================== */

:root {
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8F9FA;
  --bg-tertiary: #F1F3F5;
  --bg-card: #FFFFFF;
  --text-main: #111111;
  --text-muted: #555555;
  --text-sub: #777777;
  --border-light: #E5E7EB;
  --border-dark: #111111;
  --accent-black: #000000;
  --accent-white: #FFFFFF;
  --accent-purple: #5850EC;
  --accent-purple-light: #EEF2FF;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.12);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-mono: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --transition-normal: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
}

/* Subtle Dynamic Grid Background */
.bg-grid-pattern {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  background-image: 
    linear-gradient(to right, rgba(0, 0, 0, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 0, 0, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* Dynamic Ambient Glow */
.ambient-glow {
  position: fixed;
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 500px;
  background: radial-gradient(ellipse, rgba(0, 0, 0, 0.04) 0%, rgba(255, 255, 255, 0) 70%);
  pointer-events: none;
  z-index: -1;
  animation: pulseGlow 8s ease-in-out infinite alternate;
}

@keyframes pulseGlow {
  0% { transform: translateX(-50%) scale(0.9); opacity: 0.6; }
  100% { transform: translateX(-50%) scale(1.15); opacity: 1; }
}

/* Layout Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

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

/* Navbar */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  transition: var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--accent-black);
}

.logo-icon-box {
  width: 36px;
  height: 36px;
  background: var(--accent-black);
  color: var(--accent-white);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.logo-icon-box svg {
  width: 20px;
  height: 20px;
  fill: #FFFFFF;
  animation: lightningFlicker 3s infinite;
}

@keyframes lightningFlicker {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.85; transform: scale(1.08); }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 6px 0;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--accent-black);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent-black);
  transition: width 0.25s ease;
}

.nav-links a:hover::after, .nav-links a.active::after {
  width: 100%;
}

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

/* Button Styles - Monochrome View Style as in Figure 1 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-normal);
  white-space: nowrap;
  border: 1px solid transparent;
}

.btn-black {
  background: var(--accent-black);
  color: var(--accent-white);
  border-color: var(--accent-black);
}

.btn-black:hover {
  background: #222222;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.2);
}

.btn-white {
  background: #FFFFFF;
  color: var(--accent-black);
  border-color: var(--border-light);
}

.btn-white:hover {
  background: var(--bg-secondary);
  border-color: var(--accent-black);
  transform: translateY(-2px);
}

.btn-purple {
  background: var(--accent-purple);
  color: #FFFFFF;
  border-color: var(--accent-purple);
}

.btn-purple:hover {
  background: #4338CA;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(88, 80, 236, 0.35);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1.05rem;
  border-radius: 8px;
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

/* Hero Section */
.hero-section {
  padding: 90px 0 70px;
  text-align: center;
  position: relative;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  padding: 6px 16px;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 24px;
}

.status-dot {
  width: 8px;
  height: 8px;
  background: #10B981;
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
  animation: livePing 2s infinite;
}

@keyframes livePing {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
  70% { box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin-bottom: 24px;
  color: var(--accent-black);
}

.hero-title span.monochrome-box {
  background: var(--accent-black);
  color: #FFFFFF;
  padding: 2px 14px;
  border-radius: 6px;
  display: inline-block;
  margin: 0 4px;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 36px;
  font-weight: 400;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-tags {
  display: flex;
  justify-content: center;
  gap: 20px;
  color: var(--text-sub);
  font-size: 0.88rem;
  flex-wrap: wrap;
}

.hero-tags span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Metric / Live Stats Banner */
.stats-strip {
  margin-top: 50px;
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 30px 40px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.stats-strip::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, #111111, transparent);
  animation: scanline 4s linear infinite;
}

@keyframes scanline {
  0% { left: -100%; }
  100% { left: 100%; }
}

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

.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent-black);
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Section Header */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--text-sub);
  margin-bottom: 10px;
  display: block;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--accent-black);
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto;
}

/* Features Grid (Core Selling Points) */
.features-section {
  padding: 90px 0;
}

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

.feature-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 36px 30px;
  transition: var(--transition-normal);
  position: relative;
}

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

.feature-icon {
  width: 52px;
  height: 52px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  transition: var(--transition-normal);
}

.feature-card:hover .feature-icon {
  background: var(--accent-black);
  color: #FFFFFF;
  border-color: var(--accent-black);
}

.feature-card:hover .feature-icon svg {
  fill: #FFFFFF;
  stroke: #FFFFFF;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--accent-black);
}

.feature-text {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Speed / Node Advantages Section */
.nodes-section {
  padding: 90px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.nodes-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.node-list-box {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.node-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.92rem;
}

.node-row:last-child {
  border-bottom: none;
}

.node-info {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
}

.node-flag {
  font-size: 1.2rem;
}

.node-type-badge {
  font-size: 0.72rem;
  background: var(--bg-tertiary);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.node-ping {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  font-weight: 700;
  color: #10B981;
}

/* Pricing Section - Exact to Figure 2 */
.pricing-section {
  padding: 100px 0;
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1080px;
  margin: 0 auto;
  align-items: stretch;
}

.pricing-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 36px 30px;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition-normal);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.03);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

/* Middle Card Featured as in Figure 2 */
.pricing-card.featured {
  border: 1.5px solid var(--accent-purple);
  box-shadow: 0 8px 30px rgba(88, 80, 236, 0.12);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-purple);
  color: #FFFFFF;
  padding: 3px 14px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.plan-name {
  font-size: 1.28rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
}

.plan-price {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--accent-black);
  margin-bottom: 30px;
  letter-spacing: -0.03em;
}

.plan-features-list {
  list-style: none;
  margin-bottom: 36px;
  text-align: center;
}

.plan-features-list li {
  padding: 12px 0;
  border-bottom: 1px solid #F3F4F6;
  font-size: 0.94rem;
  color: #4B5563;
  line-height: 1.5;
}

.plan-features-list li:last-child {
  border-bottom: none;
}

.plan-features-list .feature-title-sub {
  color: #6B7280;
}

.pricing-btn-box {
  margin-top: auto;
}

.pricing-btn-outline {
  display: block;
  width: 100%;
  padding: 12px 0;
  border-radius: 6px;
  border: 1.5px solid var(--accent-purple);
  color: var(--accent-purple);
  font-weight: 600;
  font-size: 0.98rem;
  background: transparent;
  transition: var(--transition-normal);
}

.pricing-btn-outline:hover {
  background: var(--accent-purple);
  color: #FFFFFF;
}

.pricing-btn-solid {
  display: block;
  width: 100%;
  padding: 12px 0;
  border-radius: 6px;
  background: var(--accent-purple);
  color: #FFFFFF;
  font-weight: 600;
  font-size: 0.98rem;
  transition: var(--transition-normal);
  border: 1.5px solid var(--accent-purple);
}

.pricing-btn-solid:hover {
  background: #4338CA;
  border-color: #4338CA;
  transform: translateY(-2px);
}

/* Client & Platforms Download Section */
.platforms-section {
  padding: 90px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.platforms-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.platform-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.platform-card:hover {
  border-color: var(--accent-black);
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}

.platform-icon {
  font-size: 2.2rem;
  margin-bottom: 14px;
}

.platform-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.platform-desc {
  font-size: 0.82rem;
  color: var(--text-sub);
  margin-bottom: 16px;
}

.platform-btn {
  font-size: 0.82rem;
  padding: 6px 14px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  font-weight: 600;
  color: var(--text-main);
  transition: var(--transition-normal);
}

.platform-card:hover .platform-btn {
  background: var(--accent-black);
  color: #FFFFFF;
}

/* Articles Knowledge Base Section */
.articles-section {
  padding: 90px 0;
}

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

.article-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
  position: relative;
}

.article-card:hover {
  border-color: var(--accent-black);
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-sub);
  margin-bottom: 14px;
}

.article-category {
  font-weight: 700;
  color: var(--accent-black);
  background: var(--bg-secondary);
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
}

.article-card h3 {
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
  color: var(--accent-black);
}

.article-card h3 a:hover {
  text-decoration: underline;
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
  font-size: 0.85rem;
  color: var(--text-sub);
}

.article-read-link {
  font-weight: 600;
  color: var(--accent-black);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-read-link:hover {
  gap: 8px;
}

/* FAQ 50 Questions Section */
.faq-section {
  padding: 90px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.faq-search-box {
  max-width: 680px;
  margin: 0 auto 36px;
  position: relative;
}

.faq-search-input {
  width: 100%;
  padding: 16px 20px 16px 48px;
  font-size: 1rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: #FFFFFF;
  outline: none;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.faq-search-input:focus {
  border-color: var(--accent-black);
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.08);
}

.faq-search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-sub);
}

.faq-filter-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 36px;
}

.faq-tab-btn {
  padding: 8px 18px;
  font-size: 0.88rem;
  font-weight: 600;
  border: 1px solid var(--border-light);
  background: #FFFFFF;
  border-radius: 9999px;
  cursor: pointer;
  transition: var(--transition-normal);
  color: var(--text-muted);
}

.faq-tab-btn:hover, .faq-tab-btn.active {
  background: var(--accent-black);
  color: #FFFFFF;
  border-color: var(--accent-black);
}

.faq-accordion-list {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: var(--transition-normal);
}

.faq-item.active {
  border-color: var(--accent-black);
}

.faq-question-btn {
  width: 100%;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--accent-black);
  cursor: pointer;
  gap: 16px;
}

.faq-question-btn:hover {
  background: #FAFAFA;
}

.faq-toggle-icon {
  font-size: 1.2rem;
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 1000px;
  transition: max-height 0.35s ease-in-out;
  padding: 0 24px 22px;
}

.faq-answer p {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* CTA Bottom Banner */
.cta-banner {
  padding: 90px 0;
  text-align: center;
  background: #000000;
  color: #FFFFFF;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.cta-title {
  font-size: 2.8rem;
  font-weight: 900;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}

.cta-desc {
  font-size: 1.15rem;
  color: #A1A1AA;
  max-width: 640px;
  margin: 0 auto 36px;
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.cta-actions .btn-white {
  background: #FFFFFF;
  color: #000000;
  font-weight: 700;
  padding: 14px 34px;
}

.cta-actions .btn-white:hover {
  background: #E5E7EB;
}

/* Footer */
.site-footer {
  background: #FFFFFF;
  border-top: 1px solid var(--border-light);
  padding: 70px 0 30px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 50px;
}

.footer-brand p {
  margin-top: 14px;
  font-size: 0.9rem;
  color: var(--text-sub);
  line-height: 1.6;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-black);
  margin-bottom: 18px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a:hover {
  color: var(--accent-black);
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-light);
  padding-top: 24px;
  font-size: 0.82rem;
  color: var(--text-sub);
  flex-wrap: wrap;
  gap: 12px;
}

/* ===================================================================
   Article Page Specific Styles
=================================================================== */
.article-header {
  padding: 60px 0 40px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-light);
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-sub);
  margin-bottom: 20px;
}

.article-breadcrumb a:hover {
  color: var(--accent-black);
}

.article-main-title {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  color: var(--accent-black);
}

.article-post-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--text-sub);
  flex-wrap: wrap;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  padding: 60px 0 80px;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #222222;
}

.article-content h2 {
  font-size: 1.75rem;
  font-weight: 800;
  margin: 44px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
  color: var(--accent-black);
}

.article-content h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 32px 0 14px;
  color: var(--accent-black);
}

.article-content p {
  margin-bottom: 22px;
  text-align: justify;
}

.article-content ul, .article-content ol {
  margin: 0 0 24px 24px;
}

.article-content li {
  margin-bottom: 10px;
}

.article-content blockquote {
  border-left: 4px solid var(--accent-black);
  padding: 16px 22px;
  background: var(--bg-secondary);
  margin: 28px 0;
  font-style: italic;
  color: #333333;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 0.94rem;
}

.article-content th, .article-content td {
  border: 1px solid var(--border-light);
  padding: 12px 16px;
  text-align: left;
}

.article-content th {
  background: var(--bg-secondary);
  font-weight: 700;
}

.article-content tr:nth-child(even) {
  background: #FAFAFA;
}

.article-content .highlight-box {
  background: #F9FAFB;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 22px 24px;
  margin: 30px 0;
}

.article-content .highlight-box.callout-dark {
  background: #111111;
  color: #FFFFFF;
  border-color: #000000;
}

.article-content .highlight-box.callout-dark a {
  color: #FFFFFF;
  text-decoration: underline;
  font-weight: 700;
}

/* Sidebar */
.article-sidebar {
  position: sticky;
  top: 96px;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.sidebar-widget {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sidebar-widget h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-light);
}

.sidebar-toc ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.88rem;
}

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

.sidebar-toc a:hover {
  color: var(--accent-black);
  text-decoration: underline;
}

.sidebar-cta-card {
  background: #111111;
  color: #FFFFFF;
  text-align: center;
  padding: 28px 20px;
  border-radius: var(--radius-md);
}

.sidebar-cta-card h4 {
  color: #FFFFFF;
  font-size: 1.2rem;
  margin-bottom: 10px;
  border: none;
}

.sidebar-cta-card p {
  font-size: 0.88rem;
  color: #9CA3AF;
  margin-bottom: 20px;
}

/* User Reviews in Articles */
.article-reviews-section {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 2px dashed var(--border-light);
}

.reviews-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 20px;
}

.review-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.review-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.reviewer-name {
  font-weight: 700;
  font-size: 0.95rem;
}

.review-stars {
  color: #F59E0B;
  font-size: 0.85rem;
}

.review-comment {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Article Internal Linking Box */
.internal-links-box {
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  border-radius: 8px;
  padding: 24px;
  margin: 36px 0;
}

.internal-links-box h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--accent-black);
}

.internal-links-box ul {
  list-style: none;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.internal-links-box a {
  color: #2563EB;
  font-size: 0.9rem;
}

.internal-links-box a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-title { font-size: 2.8rem; }
  .features-grid, .pricing-grid, .articles-grid {
    grid-template-columns: 1fr 1fr;
  }
  .platforms-grid { grid-template-columns: repeat(3, 1fr); }
  .stats-strip { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .hero-title { font-size: 2.2rem; }
  .hero-subtitle { font-size: 1.05rem; }
  .features-grid, .pricing-grid, .articles-grid, .nodes-layout {
    grid-template-columns: 1fr;
  }
  .platforms-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-strip { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .internal-links-box ul { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #FFFFFF;
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-light);
    gap: 16px;
    box-shadow: var(--shadow-md);
  }
  .nav-links.show {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
}