/* ==========================================================================
   Flybit Official - Cyber Anime Sky Aero Light Theme (浅色羽翼航站楼)
   Domain: flybit1.my | Target: https://gnt001.gntvipaff.cc/#/?code=3Nq3FpHu
   ========================================================================== */

/* Standard System Typography Fallback for offline and file:// protocol */
:root {
  /* Light Sky Palette */
  --bg-deep: #F8FAFC;
  --bg-main: #F1F5F9;
  --bg-surface: #FFFFFF;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 0.98);

  /* Brand Primary - Fly (Sky Electric Cyan & Ocean Blue) */
  --color-fly: #0284C7;
  --color-fly-light: #00B8D4;
  --color-fly-glow: rgba(2, 132, 199, 0.25);
  --color-fly-dark: #0369A1;

  /* Accent Secondary - Bit (Anime Sakura Pink & Neon Purple) */
  --color-bit-purple: #9333EA;
  --color-bit-pink: #F43F5E;
  --color-bit-magenta: #E11D48;
  --color-bit-glow: rgba(147, 51, 234, 0.2);

  /* Functional Status Colors */
  --color-online: #10B981;
  --color-warning: #D97706;
  --color-error: #EF4444;

  /* Typography Colors */
  --text-main: #0F172A;
  --text-muted: #475569;
  --text-dim: #64748B;
  --border-light: rgba(2, 132, 199, 0.12);
  --border-cyan: rgba(0, 184, 212, 0.3);
  --border-purple: rgba(147, 51, 234, 0.25);

  /* Layout & Utility */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-cyber: 0 10px 30px rgba(0, 184, 212, 0.12);
  --shadow-neon: 0 10px 30px rgba(147, 51, 234, 0.15);
}

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

html {
  scroll-behavior: smooth;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-deep);
  color: var(--text-main);
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  position: relative;
  background: radial-gradient(circle at 50% 0%, #E0F2FE 0%, var(--bg-main) 60%, var(--bg-deep) 100%);
  background-attachment: fixed;
  line-height: 1.6;
}

/* Light Sky Grid Background Overlay */
.cyber-grid-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(to right, rgba(2, 132, 199, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(147, 51, 234, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 1;
}

/* Particle Canvas Container */
#cyber-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
}

/* Container */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 10;
}

/* Typography Helpers */
.gradient-text-fly {
  background: linear-gradient(135deg, #0284C7 0%, #00B8D4 50%, #2563EB 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-text-bit {
  background: linear-gradient(135deg, #0284C7 0%, #9333EA 50%, #F43F5E 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-text-gold {
  background: linear-gradient(135deg, #D97706 0%, #B45309 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-deep);
}
::-webkit-scrollbar-thumb {
  background: rgba(2, 132, 199, 0.3);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-fly);
}

/* Badges */
.badge-cyber {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  background: rgba(2, 132, 199, 0.08);
  border: 1px solid rgba(2, 132, 199, 0.25);
  color: var(--color-fly);
  font-size: 0.85rem;
  font-weight: 600;
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.08);
}

.badge-purple {
  background: rgba(147, 51, 234, 0.08);
  border: 1px solid rgba(147, 51, 234, 0.25);
  color: var(--color-bit-purple);
  box-shadow: 0 4px 12px rgba(147, 51, 234, 0.08);
}

.badge-hot {
  background: linear-gradient(135deg, var(--color-bit-pink), var(--color-bit-purple));
  color: #fff;
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  text-transform: uppercase;
}

/* Buttons */
.btn-fly {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.8rem;
  border-radius: var(--radius-lg);
  font-weight: 700;
  font-size: 1rem;
  color: #FFFFFF;
  background: linear-gradient(135deg, #0284C7 0%, #00B8D4 100%);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-normal);
  box-shadow: 0 6px 20px rgba(2, 132, 199, 0.3);
  position: relative;
  overflow: hidden;
}

.btn-fly::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transform: rotate(30deg) translateY(-100%);
  transition: transform 0.6s ease;
}

.btn-fly:hover::after {
  transform: rotate(30deg) translateY(100%);
}

.btn-fly:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(2, 132, 199, 0.45);
  color: #FFFFFF;
}

.btn-outline-cyber {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.8rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--border-cyan);
  backdrop-filter: blur(12px);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.btn-outline-cyber:hover {
  background: rgba(2, 132, 199, 0.08);
  border-color: var(--color-fly);
  color: var(--color-fly);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(2, 132, 199, 0.15);
}

/* Glassmorphism Cards */
.glass-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-xl);
  padding: 2rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 
    0 10px 30px rgba(15, 23, 42, 0.04),
    0 1px 2px rgba(2, 132, 199, 0.08);
  transition: all var(--transition-normal);
  position: relative;
}

.glass-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 
    0 20px 40px rgba(2, 132, 199, 0.12),
    0 2px 6px rgba(147, 51, 234, 0.08);
  border-color: rgba(0, 184, 212, 0.3);
}

.glow-border-purple:hover {
  border-color: rgba(147, 51, 234, 0.4);
  box-shadow: 0 20px 40px rgba(147, 51, 234, 0.15);
}

/* Sticky Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 1.2rem 0;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  padding: 0.75rem 0;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(2, 132, 199, 0.12);
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.05);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.logo-icon-wrap {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #0284C7, #9333EA);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3);
}

.logo-icon-wrap svg {
  width: 22px;
  height: 22px;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
}

.logo-tag {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim);
}

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

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
  position: relative;
  padding: 0.4rem 0;
}

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

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

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

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

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--text-main);
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  padding: 10rem 0 5rem 0;
  text-align: center;
}

.hero-badge-wrap {
  margin-bottom: 1.5rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-online);
  display: inline-block;
  box-shadow: 0 0 10px var(--color-online);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -1px;
  margin-bottom: 1.5rem;
  color: var(--text-main);
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 800px;
  margin: 0 auto 2.5rem auto;
  font-weight: 400;
  line-height: 1.8;
}

.hero-ctas {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.2rem;
  margin-bottom: 4rem;
  flex-wrap: wrap;
}

.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  max-width: 1000px;
  margin: 0 auto;
}

.stat-item {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(2, 132, 199, 0.12);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 0.3rem;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--text-dim);
  font-weight: 500;
}

/* Section Header Shared */
.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 3.5rem auto;
}

.section-tag {
  margin-bottom: 0.8rem;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 1rem;
}

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

/* Advantages Section */
.advantages-section {
  padding: 6rem 0;
}

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

.advantage-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.advantage-icon-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: rgba(2, 132, 199, 0.08);
  border: 1px solid rgba(2, 132, 199, 0.25);
  color: var(--color-fly);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.advantage-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  color: var(--text-main);
}

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

/* Node Latency Monitor */
.node-status-section {
  padding: 6rem 0;
}

.node-filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.node-tabs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.7);
  padding: 0.4rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(2, 132, 199, 0.12);
  flex-wrap: wrap;
}

.node-tab-btn {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.node-tab-btn.active {
  background: var(--color-fly);
  color: #fff;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.3);
}

.node-search-box {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--border-cyan);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-md);
  width: 240px;
}

.node-search-icon {
  font-size: 0.9rem;
  margin-right: 0.5rem;
  color: var(--text-dim);
}

.node-search-input {
  border: none;
  outline: none;
  background: transparent;
  width: 100%;
  font-size: 0.88rem;
  color: var(--text-main);
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}

.node-card {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(2, 132, 199, 0.12);
  border-radius: var(--radius-lg);
  padding: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all var(--transition-normal);
}

.node-card:hover {
  background: #ffffff;
  box-shadow: 0 8px 24px rgba(2, 132, 199, 0.12);
  border-color: var(--color-fly-light);
  transform: translateY(-2px);
}

.node-info {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.node-flag {
  font-size: 1.8rem;
}

.node-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 0.2rem;
}

.node-tags {
  display: flex;
  gap: 0.4rem;
  font-size: 0.72rem;
  color: var(--text-dim);
}

.node-latency-box {
  text-align: right;
}

.latency-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.1rem;
  font-weight: 700;
  transition: all 0.3s ease;
}

.latency-value.green { color: var(--color-online); }
.latency-value.yellow { color: var(--color-warning); }

.ping-animating {
  opacity: 0.3;
  transform: scale(0.9);
}

/* Pricing Section */
.pricing-section {
  padding: 6rem 0;
}

.pricing-switch-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.switch-label {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
}

.switch-label.active {
  color: var(--color-fly);
  font-weight: 700;
}

.toggle-switch {
  width: 54px;
  height: 28px;
  background: rgba(2, 132, 199, 0.18);
  border-radius: var(--radius-full);
  padding: 3px;
  cursor: pointer;
  transition: background var(--transition-normal);
  position: relative;
}

.toggle-switch.yearly {
  background: var(--color-bit-purple);
}

.toggle-slider {
  width: 22px;
  height: 22px;
  background: #ffffff;
  border-radius: 50%;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
  transition: transform var(--transition-normal);
}

.toggle-switch.yearly .toggle-slider {
  transform: translateX(26px);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.pricing-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.pricing-card.featured {
  border: 2px solid var(--color-fly);
  box-shadow: 0 15px 35px rgba(2, 132, 199, 0.18);
  transform: scale(1.03);
}

.pricing-card.featured::before {
  content: 'POPULAR 热门推荐';
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #0284C7, #00B8D4);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 10px rgba(2, 132, 199, 0.3);
}

.plan-header {
  margin-bottom: 1.5rem;
}

.plan-name {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 0.3rem;
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 0.2rem;
  margin-bottom: 1.8rem;
}

.plan-currency {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
}

.plan-price {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
}

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

.plan-features {
  list-style: none;
  margin-bottom: 2rem;

  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.plan-feature-item svg {
  color: var(--color-online);
  flex-shrink: 0;
}

.plan-feature-item.muted {
  color: var(--text-dim);
  text-decoration: line-through;
  opacity: 0.6;
}

.plan-feature-item.muted svg {
  color: var(--color-error);
}

/* User Reviews */
.reviews-section {
  padding: 6rem 0;
}

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

.review-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.2rem;
}

.user-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(2, 132, 199, 0.1);
  border: 2px solid var(--color-fly);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: var(--color-fly);
  font-size: 1.1rem;
}

.user-info h4 {
  font-size: 1rem;
  font-weight: 700;
}

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

.review-stars {
  color: #F59E0B;
  font-size: 0.9rem;
  margin-bottom: 0.8rem;
}

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

/* FAQ Accordion */
.faq-section {
  padding: 6rem 0;
}

.faq-accordion {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(2, 132, 199, 0.12);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.faq-question {
  padding: 1.2rem 1.5rem;
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--color-fly);
  transition: transform var(--transition-normal);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 1.5rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  transition: all 0.3s cubic-bezier(0, 1, 0, 1);
  background: rgba(248, 250, 252, 0.5);
}

.faq-item.active {
  border-color: var(--color-fly);
  box-shadow: 0 6px 20px rgba(2, 132, 199, 0.08);
}

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

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 1rem 1.5rem 1.5rem 1.5rem;
  transition: all 0.3s ease-in-out;
}

/* Tutorials & Knowledge Base */
.tutorials-section {
  padding: 6rem 0;
}

.tutorials-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.article-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  color: inherit;
}

.article-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-bit-purple);
  margin-bottom: 0.6rem;
  text-transform: uppercase;
}

.article-title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 0.8rem;
  color: var(--text-main);
  transition: color var(--transition-fast);
}

.article-card:hover .article-title {
  color: var(--color-fly);
}

.article-summary {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 1.5rem;

  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-size: 0.78rem;
  color: var(--text-dim);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  padding-top: 0.8rem;
}

.article-link-text {
  color: var(--color-fly);
  font-weight: 700;
}

/* Article Detail Page Layout */
.article-detail-page {
  padding: 8rem 0 5rem 0;
}

.breadcrumb {
  font-size: 0.88rem;
  color: var(--text-dim);
  margin-bottom: 2rem;
}

.breadcrumb a {
  color: var(--color-fly);
  text-decoration: none;
}

.article-header {
  margin-bottom: 3rem;
}

.article-header-title {
  font-size: 2.5rem;
  font-weight: 900;
  margin: 1rem 0;
  line-height: 1.3;
}

.article-header-meta {
  display: flex;
  gap: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.article-container {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2.5rem;
}

.article-body {
  background: rgba(255, 255, 255, 0.9);
  padding: 2.5rem;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(2, 132, 199, 0.12);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
  line-height: 1.9;
  font-size: 1.05rem;
}

.article-body h2 {
  font-size: 1.6rem;
  margin: 2rem 0 1rem 0;
  color: var(--text-main);
  border-bottom: 2px solid rgba(2, 132, 199, 0.15);
  padding-bottom: 0.5rem;
}

.article-body h3 {
  font-size: 1.25rem;
  margin: 1.5rem 0 0.8rem 0;
  color: var(--text-main);
}

.article-body p {
  margin-bottom: 1.2rem;
  color: var(--text-muted);
}

.article-body ul, .article-body ol {
  margin: 1rem 0 1.5rem 1.5rem;
  color: var(--text-muted);
}

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

.article-body blockquote {
  border-left: 4px solid var(--color-fly);
  background: rgba(2, 132, 199, 0.06);
  padding: 1rem 1.2rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(224, 242, 254, 0.8), rgba(243, 232, 255, 0.8));
  border: 1px solid var(--border-cyan);
  padding: 2rem;
  border-radius: var(--radius-lg);
  margin-top: 3rem;
  text-align: center;
}

.article-cta-box h3 {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

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

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.sidebar-card {
  padding: 1.5rem;
}

.sidebar-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  padding-bottom: 0.5rem;
}

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

.related-article-item a {
  font-size: 0.88rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
  line-height: 1.4;
  display: block;
}

.related-article-item a:hover {
  color: var(--color-fly);
}

/* Footer */
.footer {
  background: rgba(255, 255, 255, 0.9);
  border-top: 1px solid rgba(2, 132, 199, 0.12);
  padding: 4rem 0 2rem 0;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

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

.footer-col h5 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  color: var(--text-main);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 1rem;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-title { font-size: 2.8rem; }
  .advantages-grid, .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .tutorials-grid { grid-template-columns: repeat(2, 1fr); }
  .node-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .article-container { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transform: translateY(-150%);
    transition: transform var(--transition-normal);
  }

  .nav-links.mobile-open {
    transform: translateY(0);
  }

  .mobile-toggle { display: block; }
  .hero-title { font-size: 2.2rem; }
  .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid, .reviews-grid, .pricing-grid, .tutorials-grid, .node-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card.featured { transform: none; }
  .footer-grid { grid-template-columns: 1fr; }
}