@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
  --bg-primary: #06070c;
  --bg-secondary: #0e111d;
  --bg-card: rgba(18, 22, 38, 0.65);
  --bg-card-hover: rgba(26, 31, 54, 0.85);
  
  --primary: #00df89;
  --primary-glow: rgba(0, 223, 137, 0.35);
  --secondary: #7000ff;
  --secondary-glow: rgba(112, 0, 255, 0.35);
  --accent: #00a8ff;
  --accent-glow: rgba(0, 168, 255, 0.35);
  
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-inverse: #06070c;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(0, 223, 137, 0.5);
  
  --font-title: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  --max-width: 1200px;
}

/* Base resets & scrollbar */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  line-height: 1.6;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: #1a1e36;
  border-radius: 5px;
  border: 2px solid var(--bg-primary);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* Utility Layouts */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 6rem 0;
  position: relative;
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 50%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Background Gradients/Glows */
.glow-bg {
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--secondary-glow) 0%, rgba(0,0,0,0) 70%);
  top: -10%;
  right: -10%;
  z-index: 0;
  pointer-events: none;
  filter: blur(80px);
}
.glow-bg-2 {
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--primary-glow) 0%, rgba(0,0,0,0) 70%);
  bottom: 10%;
  left: -15%;
  z-index: 0;
  pointer-events: none;
  filter: blur(100px);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 2rem;
  border-radius: 50px;
  font-family: var(--font-title);
  font-weight: 600;
  text-decoration: none;
  font-size: 1rem;
  transition: var(--transition-normal);
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: var(--text-inverse);
  border: none;
  box-shadow: 0 4px 20px var(--primary-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(0, 223, 137, 0.55);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

/* Header & Nav */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(6, 7, 12, 0.7);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-normal);
}
header.scrolled {
  background: rgba(6, 7, 12, 0.9);
  padding: 0.5rem 0;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-title);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
  text-decoration: none;
  letter-spacing: -0.5px;
}
.logo-dot {
  width: 10px;
  height: 10px;
  background-color: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--primary);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}
.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition-fast);
  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-color: var(--primary);
  transition: var(--transition-fast);
}
.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

/* Hero Section */
.hero-wrapper {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  align-items: center;
  min-height: 80vh;
  padding-top: 100px;
  position: relative;
  z-index: 1;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(0, 223, 137, 0.07);
  border: 1px solid rgba(0, 223, 137, 0.2);
  color: var(--primary);
  padding: 0.4rem 1.2rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.hero-title {
  font-family: var(--font-title);
  font-size: 3.5rem;
  line-height: 1.15;
  font-weight: 800;
  margin-bottom: 1.5rem;
  letter-spacing: -1px;
}

.hero-desc {
  color: var(--text-muted);
  font-size: 1.15rem;
  margin-bottom: 2.5rem;
  max-width: 600px;
}

.hero-ctas {
  display: flex;
  gap: 1.2rem;
  margin-bottom: 3.5rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
}
.stat-item h3 {
  font-family: var(--font-title);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 0.2rem;
}
.stat-item p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Animated visual element in Hero */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.visual-globe {
  width: 320px;
  height: 320px;
  border-radius: 50%;
  border: 1px dashed rgba(255, 255, 255, 0.15);
  position: relative;
  animation: spin 60s linear infinite;
  display: flex;
  justify-content: center;
  align-items: center;
}
.visual-orbit {
  position: absolute;
  width: 440px;
  height: 440px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.05);
  animation: spin-reverse 45s linear infinite;
}
.visual-card {
  position: absolute;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.2rem;
  width: 220px;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  animation: float 6s ease-in-out infinite;
  z-index: 10;
}
.visual-card-1 {
  top: 10%;
  right: -5%;
  animation-delay: 0s;
}
.visual-card-2 {
  bottom: 10%;
  left: -5%;
  animation-delay: 3s;
}
.visual-card-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(0, 168, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}
.visual-card-info h4 {
  font-size: 0.9rem;
  font-weight: 600;
}
.visual-card-info p {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.node-ping {
  color: var(--primary);
  font-weight: bold;
}

/* Sections Common Header */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem auto;
  position: relative;
  z-index: 1;
}
.section-tag {
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 0.8rem;
  display: block;
}
.section-title {
  font-family: var(--font-title);
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
}
.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  position: relative;
  z-index: 1;
}
.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2.5rem;
  transition: var(--transition-normal);
}
.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: 0 10px 30px rgba(0, 223, 137, 0.05);
}
.feature-icon {
  width: 55px;
  height: 55px;
  border-radius: 14px;
  background: rgba(0, 223, 137, 0.08);
  border: 1px solid rgba(0, 223, 137, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 1.8rem;
}
.feature-card h3 {
  font-family: var(--font-title);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1rem;
}
.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  align-items: stretch;
  position: relative;
  z-index: 1;
}
.pricing-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-normal);
}
.pricing-card.popular {
  border-color: var(--primary);
  box-shadow: 0 10px 40px rgba(0, 223, 137, 0.1);
  background: linear-gradient(180deg, rgba(18, 22, 38, 0.9) 0%, rgba(14, 17, 29, 0.95) 100%);
  transform: translateY(-8px);
}
.pricing-card.popular::before {
  content: '推荐订阅';
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: var(--text-inverse);
  padding: 0.3rem 1.2rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.pricing-card:hover {
  border-color: var(--accent);
  transform: translateY(-5px);
}
.pricing-card.popular:hover {
  border-color: var(--primary);
  transform: translateY(-10px);
}

.plan-name {
  font-family: var(--font-title);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  color: var(--text-main);
}
.plan-price {
  font-family: var(--font-title);
  margin-bottom: 1.8rem;
}
.plan-price .currency {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary);
}
.plan-price .amount {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--text-main);
}
.plan-price .period {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.plan-features {
  list-style: none;
  margin-bottom: 2.5rem;
  flex-grow: 1;
}
.plan-features li {
  margin-bottom: 0.9rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.plan-features li svg {
  color: var(--primary);
  flex-shrink: 0;
  width: 16px;
  height: 16px;
}

.pricing-card .btn {
  width: 100%;
}

/* User Reviews Section */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  position: relative;
  z-index: 1;
}
.review-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2rem;
  transition: var(--transition-normal);
}
.review-card:hover {
  border-color: rgba(255, 255, 255, 0.15);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
}
.review-stars {
  display: flex;
  gap: 0.2rem;
  margin-bottom: 1rem;
  color: #ffb703;
}
.review-stars svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}
.review-content {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  min-height: 70px;
}
.review-user {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--secondary) 0%, var(--accent) 100%);
  font-family: var(--font-title);
  font-weight: 700;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}
.review-user-info h4 {
  font-size: 0.9rem;
  font-weight: 600;
}
.review-user-info p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* FAQ Accordion Section */
.faq-wrapper {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
details.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  margin-bottom: 1rem;
  overflow: hidden;
  transition: var(--transition-normal);
}
details.faq-item[open] {
  border-color: var(--primary);
  background: var(--bg-card-hover);
}
summary.faq-question {
  padding: 1.5rem;
  font-size: 1.05rem;
  font-weight: 600;
  font-family: var(--font-title);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
summary.faq-question::-webkit-details-marker {
  display: none;
}
summary.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 400;
  transition: transform var(--transition-normal);
  color: var(--primary);
}
details.faq-item[open] summary.faq-question::after {
  content: '−';
  transform: rotate(180deg);
}
.faq-answer {
  padding: 0 1.5rem 1.5rem 1.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 1rem;
}

/* Blog Section on Landing Page */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  position: relative;
  z-index: 1;
}
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
}
.article-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent);
  box-shadow: 0 10px 30px rgba(0, 168, 255, 0.05);
}
.article-img {
  height: 180px;
  background: linear-gradient(135deg, rgba(112, 0, 255, 0.2) 0%, rgba(0, 223, 137, 0.2) 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-title);
  font-size: 3rem;
  color: rgba(255,255,255,0.25);
}
.article-meta {
  padding: 1.5rem 1.5rem 0.5rem 1.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  gap: 1rem;
}
.article-body {
  padding: 0 1.5rem 1.5rem 1.5rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}
.article-body h3 {
  font-family: var(--font-title);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  line-height: 1.4;
}
.article-body h3 a {
  color: var(--text-main);
  text-decoration: none;
  transition: var(--transition-fast);
}
.article-body h3 a:hover {
  color: var(--primary);
}
.article-excerpt {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  line-height: 1.5;
  flex-grow: 1;
}
.article-link {
  color: var(--primary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition-fast);
}
.article-link:hover {
  color: var(--accent);
  gap: 0.6rem;
}

/* Article Page Specifics */
.article-header {
  padding-top: 120px;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border-color);
  position: relative;
  z-index: 1;
}
.article-breadcrumbs {
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.article-breadcrumbs a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}
.article-breadcrumbs a:hover {
  color: var(--primary);
}
.article-title-large {
  font-family: var(--font-title);
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 1.5rem;
}
.article-meta-large {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.article-author-img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-inverse);
  font-weight: bold;
  font-size: 0.75rem;
}

.article-content-layout {
  display: grid;
  grid-template-columns: 2.8fr 1.2fr;
  gap: 4rem;
  padding: 4rem 0;
  position: relative;
  z-index: 1;
}
.article-text {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #e5e7eb;
}
.article-text p {
  margin-bottom: 1.8rem;
}
.article-text h2 {
  font-family: var(--font-title);
  font-size: 1.8rem;
  font-weight: 700;
  margin: 2.5rem 0 1.2rem 0;
  color: var(--text-main);
}
.article-text h3 {
  font-family: var(--font-title);
  font-size: 1.4rem;
  font-weight: 700;
  margin: 2rem 0 1rem 0;
  color: var(--text-main);
}
.article-text ul, .article-text ol {
  margin-bottom: 1.8rem;
  padding-left: 1.5rem;
}
.article-text li {
  margin-bottom: 0.6rem;
}
.article-text strong {
  color: var(--primary);
}
.article-text blockquote {
  border-left: 4px solid var(--primary);
  background: var(--bg-card);
  padding: 1.5rem;
  border-radius: 0 12px 12px 0;
  margin: 2rem 0;
  font-style: italic;
  color: var(--text-main);
}
.article-text blockquote strong {
  color: var(--text-main);
}

/* Sidebar & Internal Linking Matrix Widget */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}
.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2rem;
}
.sidebar-widget h3 {
  font-family: var(--font-title);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  border-bottom: 1.5px solid var(--primary);
  padding-bottom: 0.5rem;
  color: var(--text-main);
}
.sidebar-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}
.sidebar-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  line-height: 1.4;
  transition: var(--transition-fast);
  display: block;
}
.sidebar-links a:hover {
  color: var(--primary);
  transform: translateX(3px);
}
.sidebar-links li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}
.sidebar-links li::before {
  content: '→';
  color: var(--primary);
  flex-shrink: 0;
}

.promo-box {
  background: linear-gradient(135deg, rgba(112, 0, 255, 0.4) 0%, rgba(0, 223, 137, 0.1) 100%);
  border: 1px solid var(--primary);
  text-align: center;
}
.promo-box h4 {
  font-family: var(--font-title);
  font-size: 1.25rem;
  margin-bottom: 0.8rem;
  color: var(--text-main);
}
.promo-box p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}
.promo-box .btn {
  width: 100%;
}

/* Footer Section */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem 0;
  position: relative;
  z-index: 1;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}
.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 1rem;
  max-width: 250px;
}
.footer-col h4 {
  font-family: var(--font-title);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text-main);
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}
.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition-fast);
}
.footer-links a:hover {
  color: var(--primary);
}
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.footer-bottom-links {
  display: flex;
  gap: 1.5rem;
}
.footer-bottom-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}
.footer-bottom-links a:hover {
  color: var(--primary);
}

/* Animations */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes spin-reverse {
  from { transform: rotate(360deg); }
  to { transform: rotate(0deg); }
}
@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-15px); }
  100% { transform: translateY(0px); }
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
  .features-grid, .reviews-grid, .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-wrapper {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
    padding-top: 80px;
  }
  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-ctas {
    justify-content: center;
  }
  .hero-stats {
    max-width: 600px;
    margin: 0 auto;
  }
  .hero-visual {
    display: none; /* Hide complex orbits on tablets/mobile for performance and layout cleaniness */
  }
  .article-content-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  section {
    padding: 4rem 0;
  }
  .pricing-grid, .features-grid, .reviews-grid, .articles-grid {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2.5rem;
  }
  .nav-menu {
    display: none; /* Mobile menu can be expanded, but keeping it simple for clean static view */
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-brand {
    text-align: center;
  }
  .footer-brand p {
    margin-left: auto;
    margin-right: auto;
  }
  .footer-col {
    text-align: center;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}