/* ==========================================================================
   夜煞云机场 (Night Fury Cloud) - Celestial Silhouette & Midnight Minimalist Design System
   ========================================================================== */

:root {
  --bg-deep: #030712;
  --bg-midnight: #070c1b;
  --bg-card: rgba(10, 16, 31, 0.65);
  --bg-card-hover: rgba(15, 23, 45, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(56, 189, 248, 0.25);
  --border-purple: rgba(168, 85, 247, 0.35);
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --accent-cyan: #38bdf8;
  --accent-indigo: #818cf8;
  --accent-purple: #a855f7;
  --accent-moon: #e0f2fe;
  
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  --shadow-glow: 0 0 35px -5px rgba(56, 189, 248, 0.22);
  --shadow-purple: 0 0 35px -5px rgba(168, 85, 247, 0.3);
  --transition-fast: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-deep);
  color: var(--text-main);
}

body {
  font-family: var(--font-sans);
  line-height: 1.75;
  background: radial-gradient(circle at 50% 0%, #0c142b 0%, #030712 70%);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* Canvas Starfield & Meteor Background */
#starfield {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.85;
}

/* Background Ambient Glows & Wings Silhouette */
.ambient-glow-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  z-index: 1;
}

.wing-silhouette-bg {
  position: absolute;
  top: 4%;
  left: 50%;
  transform: translateX(-50%);
  width: 1100px;
  height: 600px;
  opacity: 0.16;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  filter: drop-shadow(0 0 45px rgba(56, 189, 248, 0.4));
  animation: pulseWing 12s ease-in-out infinite alternate;
}

@keyframes pulseWing {
  0% { transform: translateX(-50%) scale(1); opacity: 0.12; }
  50% { transform: translateX(-50%) scale(1.05); opacity: 0.22; }
  100% { transform: translateX(-50%) scale(1); opacity: 0.12; }
}

.lunar-arc-left {
  position: absolute;
  top: -150px;
  left: -150px;
  width: 550px;
  height: 550px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.18) 0%, rgba(3, 7, 18, 0) 70%);
  filter: blur(80px);
  animation: floatOrb 15s ease-in-out infinite alternate;
}

.lunar-arc-right {
  position: absolute;
  top: 22%;
  right: -150px;
  width: 650px;
  height: 650px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.15) 0%, rgba(3, 7, 18, 0) 70%);
  filter: blur(90px);
  animation: floatOrb 18s ease-in-out infinite alternate-reverse;
}

@keyframes floatOrb {
  0% { transform: translateY(0px) rotate(0deg); }
  100% { transform: translateY(30px) rotate(10deg); }
}

/* Typography & Links */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: var(--transition-fast);
}

a:hover {
  color: #7dd3fc;
  text-shadow: 0 0 10px rgba(56, 189, 248, 0.6);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 2;
}

/* Header & Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(3, 7, 18, 0.8);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1rem 0;
  transition: var(--transition-fast);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.05em;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.25), rgba(168, 85, 247, 0.35));
  border: 1px solid var(--border-glow);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.4);
  position: relative;
  overflow: hidden;
}

.logo-icon::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: conic-gradient(transparent, rgba(56, 189, 248, 0.5), transparent 30%);
  animation: rotateGlow 6s linear infinite;
}

@keyframes rotateGlow {
  100% { transform: rotate(360deg); }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  position: relative;
  padding: 0.5rem 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  transition: var(--transition-fast);
  border-radius: 2px;
}

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

.nav-cta {
  background: linear-gradient(135deg, #0284c7 0%, #7e22ce 100%);
  color: #ffffff !important;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  box-shadow: 0 0 25px rgba(126, 34, 206, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.25);
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 35px rgba(56, 189, 248, 0.7);
  text-shadow: none;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  padding: 7rem 0 4rem;
  text-align: center;
  position: relative;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1.1rem;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-full);
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 2rem;
  backdrop-filter: blur(10px);
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
  animation: blink 2s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  background: linear-gradient(180deg, #ffffff 30%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.03em;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 780px;
  margin: 0 auto 2.5rem;
  font-weight: 400;
  line-height: 1.8;
}

.hero-visual-banner {
  max-width: 860px;
  margin: 0 auto 3rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-glow);
  overflow: hidden;
  box-shadow: 0 0 50px rgba(56, 189, 248, 0.2);
  transition: var(--transition-slow);
}

.hero-visual-banner:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 65px rgba(168, 85, 247, 0.35);
}

.hero-visual-banner img, .hero-visual-banner svg {
  display: block;
  width: 100%;
  height: auto;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  margin-bottom: 4rem;
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #9333ea 100%);
  color: #fff;
  padding: 1rem 2.2rem;
  border-radius: var(--radius-full);
  font-size: 1.05rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  box-shadow: 0 0 35px rgba(147, 51, 234, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.25);
  transition: var(--transition-fast);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 0 50px rgba(56, 189, 248, 0.75);
  color: #fff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  padding: 1rem 2.2rem;
  border-radius: var(--radius-full);
  font-size: 1.05rem;
  font-weight: 500;
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
  transition: var(--transition-fast);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--border-glow);
  color: var(--accent-cyan);
  transform: translateY(-3px);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  max-width: 960px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-glow);
}

.stat-item {
  text-align: center;
  border-right: 1px solid var(--border-subtle);
}

.stat-item:last-child {
  border-right: none;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 0.25rem;
  background: linear-gradient(135deg, #fff 0%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}

/* Feature Grid */
.section {
  padding: 6rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem;
}

.section-subtitle {
  color: var(--accent-cyan);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

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

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

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

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  opacity: 0;
  transition: var(--transition-fast);
}

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

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

.feature-icon {
  width: 52px;
  height: 52px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid var(--border-glow);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--accent-cyan);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature-title {
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
}

.feature-text {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Dynamic Illustration Banner Wrapper */
.diagram-banner-wrapper {
  margin: 4rem 0 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-glow);
  overflow: hidden;
  box-shadow: var(--shadow-glow);
}

.diagram-banner-wrapper img, .diagram-banner-wrapper svg {
  width: 100%;
  display: block;
}

/* Pricing Section - Tailored to User Spec & Image */
.pricing-subtitle-bar {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 3rem;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.pricing-card {
  background: rgba(12, 16, 32, 0.75);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  backdrop-filter: blur(20px);
  transition: var(--transition-slow);
}

.pricing-card:hover {
  border-color: rgba(56, 189, 248, 0.4);
  transform: translateY(-8px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
}

.pricing-card.featured {
  border: 2px solid #a855f7;
  box-shadow: var(--shadow-purple);
  background: rgba(18, 14, 38, 0.85);
  transform: scale(1.04);
}

.pricing-card.featured:hover {
  transform: scale(1.06) translateY(-8px);
}

.pricing-badge {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: linear-gradient(135deg, #a855f7, #6366f1);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  letter-spacing: 0.05em;
  box-shadow: 0 0 12px rgba(168, 85, 247, 0.5);
}

.pricing-plan-name {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  margin-bottom: 2rem;
}

.price-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-right: 0.2rem;
}

.pricing-card.featured .price-currency {
  color: #38bdf8;
}

.price-amount {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--accent-cyan);
  line-height: 1;
}

.price-period {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-left: 0.3rem;
}

.pricing-features-list {
  list-style: none;
  margin-bottom: 2.5rem;
  flex-grow: 1;
}

.pricing-features-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.pricing-features-list li svg {
  width: 18px;
  height: 18px;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

.pricing-features-list li strong {
  color: var(--text-main);
  font-weight: 600;
}

.btn-pricing {
  width: 100%;
  padding: 0.9rem;
  border-radius: 12px;
  text-align: center;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.05em;
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  transition: var(--transition-fast);
}

.btn-pricing:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--accent-cyan);
  color: #fff;
}

.pricing-card.featured .btn-pricing {
  background: linear-gradient(135deg, #9333ea, #3b82f6);
  border: none;
  color: #fff;
  box-shadow: 0 0 20px rgba(147, 51, 234, 0.5);
}

.pricing-card.featured .btn-pricing:hover {
  box-shadow: 0 0 30px rgba(56, 189, 248, 0.8);
  transform: translateY(-2px);
}

/* Tutorial Section with Tab Control */
.tutorial-tabs {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.tab-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.tab-btn:hover, .tab-btn.active {
  background: rgba(56, 189, 248, 0.12);
  border-color: var(--accent-cyan);
  color: var(--text-main);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.2);
}

.tutorial-content-pane {
  display: none;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 3rem;
  backdrop-filter: blur(20px);
}

.tutorial-content-pane.active {
  display: block;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.tutorial-steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.step-card {
  position: relative;
  padding-left: 3.5rem;
}

.step-num {
  position: absolute;
  left: 0;
  top: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  color: #fff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.4);
}

.step-title {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.step-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* User Reviews Section */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2rem;
  backdrop-filter: blur(16px);
}

.review-stars-svg {
  display: flex;
  gap: 4px;
  color: #f59e0b;
  margin-bottom: 1rem;
}

.review-text {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.avatar-circle {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1e293b, #334155);
  border: 1px solid var(--border-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--accent-cyan);
}

.author-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
}

.author-info p {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* FAQ Collapsible Accordion */
.faq-accordion {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  backdrop-filter: blur(16px);
  transition: var(--transition-fast);
}

.faq-item.active {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

.faq-question {
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 600;
  user-select: none;
}

.faq-icon {
  font-size: 1rem;
  color: var(--accent-cyan);
  transition: transform 0.3s ease;
  display: flex;
  align-items: center;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out, padding 0.35s ease;
  padding: 0 2rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 2rem 1.5rem 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Articles Catalogue Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2rem;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(16px);
  transition: var(--transition-slow);
}

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

.article-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-cyan);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.article-card-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.article-card-title a {
  color: var(--text-main);
}

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

.article-excerpt {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-dim);
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
}

/* Article Detail & Inner Pages Styling */
.article-header {
  padding: 7rem 0 3rem;
  text-align: center;
}

.article-meta-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-top: 1rem;
}

.article-body-wrapper {
  max-width: 840px;
  margin: 0 auto 5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 3.5rem;
  backdrop-filter: blur(20px);
}

.article-content {
  color: #cbd5e1;
  font-size: 1.05rem;
  line-height: 1.9;
}

.article-content h2 {
  font-size: 1.75rem;
  margin: 2.5rem 0 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-main);
}

.article-content h3 {
  font-size: 1.35rem;
  margin: 2rem 0 1rem;
  color: var(--accent-cyan);
}

.article-content p {
  margin-bottom: 1.5rem;
}

.article-content ul, .article-content ol {
  margin: 1.25rem 0 1.5rem 2rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content blockquote {
  border-left: 4px solid var(--accent-cyan);
  background: rgba(56, 189, 248, 0.05);
  padding: 1.25rem 1.75rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 2rem 0;
  font-style: italic;
  color: #e2e8f0;
}

.article-content code {
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.08);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.9em;
  color: #7dd3fc;
}

.article-content pre {
  background: #020617;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  overflow-x: auto;
  margin: 2rem 0;
}

.article-content pre code {
  background: transparent;
  padding: 0;
  color: #f1f5f9;
}

.table-wrapper {
  overflow-x: auto;
  margin: 2rem 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

th, td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
}

th {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  font-weight: 700;
}

tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.article-faq-box {
  margin-top: 4rem;
  background: rgba(7, 12, 27, 0.9);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 2.5rem;
}

.article-faq-box h3 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--accent-cyan);
}

/* Footer & Site Map */
.footer {
  background: #02040a;
  border-top: 1px solid var(--border-subtle);
  padding: 5rem 0 3rem;
  position: relative;
  z-index: 2;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 1rem;
  max-width: 320px;
}

.footer-column h4 {
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
  color: var(--text-main);
  letter-spacing: 0.05em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

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

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

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-dim);
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.4rem;
  }
  
  .hero-subtitle {
    font-size: 1.05rem;
  }
  
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
  
  .stat-item {
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
    padding-bottom: 1rem;
  }
  
  .stat-item:nth-child(3), .stat-item:nth-child(4) {
    border-bottom: none;
    padding-bottom: 0;
  }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: #070c1b;
    flex-direction: column;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .article-body-wrapper {
    padding: 1.75rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
}