/* ==========================================================================
   M78星云机场 - 猎户座分子云冷尘埃沉降：冷冻凝胶与星际颗粒切片 (Design System)
   ========================================================================== */

:root {
  --bg-main: #EEEEF2;
  --bg-subtle: #F4F4F8;
  --bg-card: rgba(255, 255, 255, 0.82);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --bg-glass: rgba(244, 244, 248, 0.7);
  --border-color: rgba(210, 218, 232, 0.75);
  --border-highlight: rgba(14, 165, 233, 0.4);
  
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #64748B;
  --text-light: #94A3B8;

  --accent-cyan: #0EA5E9;
  --accent-blue: #2563EB;
  --accent-sky: #38BDF8;
  --accent-teal: #0D9488;
  --accent-glow: rgba(14, 165, 233, 0.15);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "Consolas", "Liberation Mono", "Courier New", monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 20px 40px rgba(14, 165, 233, 0.08);
  --shadow-glow: 0 0 25px rgba(14, 165, 233, 0.25);

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-main);
  scroll-behavior: smooth;
}

body {
  position: relative;
  overflow-x: hidden;
  min-height: 100vh;
  background: radial-gradient(circle at 50% 0%, rgba(224, 231, 245, 0.6) 0%, #EEEEF2 70%);
}

#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.85;
}

.site-wrapper {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

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

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

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

.section-padding {
  padding: 80px 0;
}

/* Header & Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(238, 238, 242, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-cyan);
  background: rgba(14, 165, 233, 0.08);
  border: 1px solid rgba(14, 165, 233, 0.3);
  border-radius: 20px;
}

.brand-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  background-color: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-cyan);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  font-size: 0.92rem;
  font-weight: 600;
  color: #FFFFFF !important;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  border-radius: 30px;
  box-shadow: var(--shadow-sm), 0 0 15px rgba(14, 165, 233, 0.3);
  transition: all var(--transition-normal);
}

.nav-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md), 0 0 20px rgba(14, 165, 233, 0.45);
}

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

/* Aerogel Specimen Card Framework */
.aerogel-card {
  position: relative;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.aerogel-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--border-highlight), transparent);
  opacity: 0.6;
}

.aerogel-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: translateY(-4px);
}

/* Specimen Corner Telemetry Tag */
.telemetry-tag {
  position: absolute;
  top: 14px;
  right: 18px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  background: rgba(238, 238, 242, 0.6);
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid rgba(200, 208, 220, 0.5);
  pointer-events: none;
}

/* Hero Section */
.hero-section {
  padding: 70px 0 90px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-title-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--border-highlight);
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-blue);
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 20px;
}

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

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
}

.hero-keywords-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 36px;
}

.keyword-pill {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--border-color);
  padding: 5px 14px;
  border-radius: 20px;
  transition: all var(--transition-fast);
}

.keyword-pill:hover {
  color: var(--accent-blue);
  border-color: var(--accent-cyan);
  background: rgba(14, 165, 233, 0.05);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 36px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #FFFFFF !important;
  background: linear-gradient(135deg, #0284C7 0%, #2563EB 100%);
  border: none;
  border-radius: 14px;
  box-shadow: 0 10px 25px rgba(2, 132, 199, 0.3);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 35px rgba(2, 132, 199, 0.45), 0 0 20px rgba(56, 189, 248, 0.4);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 28px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.btn-secondary:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-blue);
  background: #FFFFFF;
}

/* Specimen Interactive Speed Test Box */
.specimen-chamber {
  position: relative;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(190, 205, 225, 0.9);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.08);
  overflow: hidden;
}

.specimen-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--border-color);
}

.specimen-title-text {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.specimen-telemetry {
  display: flex;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-cyan);
  background: rgba(14, 165, 233, 0.06);
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid rgba(14, 165, 233, 0.2);
}

.specimen-img-wrapper {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 20px;
  border: 1px solid rgba(220, 228, 240, 0.8);
}

.specimen-img-wrapper img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.speed-test-display {
  background: rgba(15, 23, 42, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 16px;
}

.speed-test-nodes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}

.node-item {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px;
  text-align: center;
  transition: all var(--transition-fast);
}

.node-item.active {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px rgba(14, 165, 233, 0.2);
}

.node-name {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-primary);
}

.node-ping {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-teal);
  margin-top: 2px;
}

.node-multiplier {
  display: inline-block;
  font-size: 0.68rem;
  color: #059669;
  background: #ECFDF5;
  padding: 1px 6px;
  border-radius: 10px;
  margin-top: 4px;
  font-weight: 600;
}

.test-control-btn {
  width: 100%;
  padding: 12px;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--accent-blue);
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.3);
  border-radius: 10px;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.test-control-btn:hover {
  background: var(--accent-blue);
  color: #FFFFFF;
}

/* Section Header Component */
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-cyan);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

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

/* Features Section (Core Advantages) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  position: relative;
}

.feature-icon-box {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.12), rgba(37, 99, 235, 0.08));
  border: 1px solid rgba(14, 165, 233, 0.3);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--accent-blue);
  margin-bottom: 20px;
}

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

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Pricing Section */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

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

.pricing-card.featured {
  border: 2px solid var(--accent-cyan);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(14, 165, 233, 0.2);
}

.featured-badge {
  position: absolute;
  top: 14px;
  right: 18px;
  font-size: 0.72rem;
  font-weight: 700;
  color: #FFFFFF;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  padding: 3px 10px;
  border-radius: 20px;
}

.plan-name {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.plan-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.plan-price-box {
  margin-bottom: 24px;
}

.plan-price {
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
}

.plan-price .currency {
  font-size: 1.4rem;
  font-weight: 700;
}

.plan-price .unit {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
}

.plan-features {
  list-style: none;
  margin-bottom: 28px;
}

.plan-features li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.plan-features li::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 9px;
  border: solid var(--accent-teal);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
  margin-right: 6px;
  flex-shrink: 0;
}

.pricing-btn {
  width: 100%;
  text-align: center;
  padding: 12px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.95rem;
}

/* Audience Section (Suitable For) */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.audience-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.audience-icon {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--accent-cyan);
  background: rgba(14, 165, 233, 0.08);
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(14, 165, 233, 0.3);
  flex-shrink: 0;
}

/* Tutorial Section Tabs & Content */
.tutorial-tabs {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 36px;
}

.tab-btn {
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab-btn.active, .tab-btn:hover {
  color: #FFFFFF;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  border-color: transparent;
  box-shadow: 0 6px 20px rgba(14, 165, 233, 0.3);
}

.tutorial-content-pane {
  display: none;
}

.tutorial-content-pane.active {
  display: block;
}

.tutorial-steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.step-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.step-number {
  position: relative;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: #FFFFFF;
  font-weight: 800;
  font-size: 0.88rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
  margin-bottom: 12px;
  flex-shrink: 0;
}

.step-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

/* Reviews / Testimonials Section */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-stars {
  color: #F59E0B;
  margin-bottom: 12px;
  font-size: 0.9rem;
}

.review-quote {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  color: #FFFFFF;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.author-name {
  font-weight: 700;
  font-size: 0.92rem;
}

.author-tag {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* FAQ Accordion Component */
.faq-accordion {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-question {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-toggle-icon {
  font-size: 1.2rem;
  color: var(--accent-blue);
  transition: transform var(--transition-fast);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 24px 20px;
}

/* Articles Directory Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

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

.article-category {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-cyan);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-primary);
  margin-bottom: 12px;
}

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

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(220, 228, 240, 0.6);
  padding-top: 12px;
}

/* Single Article Body Layout */
.article-page-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  padding: 60px 0;
}

.article-main-content {
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

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

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

.article-header-block {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.article-h1-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.article-meta-bar {
  display: flex;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.article-body-text {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.article-body-text h2 {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid rgba(14, 165, 233, 0.2);
}

.article-body-text h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 24px 0 12px;
}

.article-body-text p {
  margin-bottom: 18px;
}

.article-body-text ul, .article-body-text ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

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

.article-cta-box {
  margin: 40px 0;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.08), rgba(37, 99, 235, 0.05));
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 30px;
  text-align: center;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-widget {
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.sidebar-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--accent-cyan);
}

.sidebar-links {
  list-style: none;
}

.sidebar-links li {
  margin-bottom: 12px;
}

.sidebar-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.4;
  display: block;
}

.sidebar-links a:hover {
  color: var(--accent-blue);
}

/* Footer Layout */
.footer {
  margin-top: auto;
  background: #0F172A;
  color: #94A3B8;
  padding: 70px 0 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand {
  font-size: 1.25rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-desc {
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

.footer-column-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  font-size: 0.88rem;
  color: #94A3B8;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: #64748B;
}

/* Responsive Queries */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .features-grid, .pricing-grid, .audience-grid, .tutorial-steps-grid, .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .article-page-layout {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .features-grid, .pricing-grid, .audience-grid, .tutorial-steps-grid, .reviews-grid, .articles-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}