/* ==========================================================================
   纵云梯 (ZONGYUNTI.CYOU) - OFFICIAL BRANDING & DESIGN SYSTEM
   Modern Purple/Blue SaaS Aesthetic | High Conversion Landing Page
   ========================================================================== */

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

:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-gradient: linear-gradient(135deg, #6366f1 0%, #4f46e5 50%, #3b82f6 100%);
  --accent-purple: #7c3aed;
  --accent-glow: rgba(99, 102, 241, 0.25);
  
  --bg-main: #f8fafc;
  --bg-hero: linear-gradient(180deg, #f1f5f9 0%, #ffffff 100%);
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.85);

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  
  --border-light: #e2e8f0;
  --border-focus: #818cf8;

  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 14px rgba(79, 70, 229, 0.08);
  --shadow-lg: 0 12px 30px rgba(79, 70, 229, 0.12);
  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.35);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

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

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Mouse Trail Canvas Overlay */
#mouse-trail-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 9999;
}

/* Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Navigation Bar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 72px;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  display: flex;
  align-items: center;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--primary);
  letter-spacing: -0.5px;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.2);
}

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

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-nav-login {
  padding: 0.5rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  border: 1.5px solid rgba(79, 70, 229, 0.3);
  background: rgba(79, 70, 229, 0.05);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: var(--transition);
}

.btn-nav-login:hover {
  background: rgba(79, 70, 229, 0.15);
  border-color: var(--primary);
}

.btn-nav-register {
  padding: 0.5rem 1.4rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: #ffffff;
  background: var(--primary-gradient);
  border-radius: var(--radius-sm);
  text-decoration: none;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.btn-nav-register:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

.lang-selector {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 0.4rem 0.6rem;
  background: #f1f5f9;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-main);
  cursor: pointer;
}

/* HERO SECTION - Matching Screenshot */
.hero-section {
  position: relative;
  padding-top: 140px;
  padding-bottom: 90px;
  background: var(--bg-hero);
  text-align: center;
  overflow: hidden;
}

.hero-bg-canvas {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1200px;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.7;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1.1rem;
  background: rgba(79, 70, 229, 0.08);
  border: 1px solid rgba(79, 70, 229, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 1.8rem;
}

.hero-title {
  font-size: 3.8rem;
  font-weight: 900;
  letter-spacing: -1.5px;
  color: var(--primary);
  margin-bottom: 1.2rem;
  line-height: 1.1;
  background: linear-gradient(135deg, #312e81 0%, #4f46e5 50%, #2563eb 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  font-weight: 400;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

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

.btn-hero-primary {
  padding: 0.9rem 2.2rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  background: var(--primary-gradient);
  border-radius: var(--radius-full);
  text-decoration: none;
  box-shadow: 0 10px 25px rgba(79, 70, 229, 0.35);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-hero-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 35px rgba(79, 70, 229, 0.45);
}

.btn-hero-secondary {
  padding: 0.9rem 2rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  background: #ffffff;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.btn-hero-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: #f8fafc;
}

/* STATS COUNTER BAR - Matching Screenshot */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  max-width: 1050px;
  margin: 0 auto;
  padding: 1.8rem 2rem;
  background: #ffffff;
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
  border: 1px solid var(--border-light);
  position: relative;
  z-index: 2;
}

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

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -0.75rem;
  top: 15%;
  height: 70%;
  width: 1px;
  background: var(--border-light);
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1.2;
}

.stat-label {
  display: inline-block;
  margin-top: 0.3rem;
  padding: 0.15rem 0.6rem;
  background: rgba(79, 70, 229, 0.08);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

/* PRICING SECTION - EXACT SINGLE ROW LAYOUT ("价格格式一排") */
.pricing-section {
  padding: 100px 0;
  background: #ffffff;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3.5rem auto;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -1px;
  margin-bottom: 0.8rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
}

/* Horizontal Row Container for Cards */
.pricing-grid-row {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: stretch;
  gap: 1.25rem;
  width: 100%;
}

.pricing-card {
  flex: 1;
  min-width: 0;
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem 1.4rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

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

.pricing-card.popular {
  border: 2px solid var(--primary);
  box-shadow: 0 10px 30px rgba(79, 70, 229, 0.18);
  background: linear-gradient(180deg, #ffffff 0%, #f5f3ff 100%);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 1rem;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.3);
  letter-spacing: 1px;
  white-space: nowrap;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  min-height: 40px;
}

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

.price-currency {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
}

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

.price-period {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.plan-features {
  list-style: none;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: #334155;
  margin-bottom: 0.85rem;
}

.plan-features li svg {
  width: 18px;
  height: 18px;
  color: var(--primary);
  flex-shrink: 0;
}

.btn-plan {
  width: 100%;
  padding: 0.8rem 1rem;
  font-size: 0.95rem;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.btn-plan-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
}

.btn-plan-primary:hover {
  box-shadow: var(--shadow-glow);
}

.btn-plan-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

.btn-plan-outline:hover {
  background: rgba(79, 70, 229, 0.08);
}

/* FEATURES GRID SECTION */
.features-section {
  padding: 90px 0;
  background: var(--bg-main);
}

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

.feature-card {
  background: #ffffff;
  padding: 2.2rem 1.8rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(79, 70, 229, 0.08);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.4rem;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.6rem;
}

.feature-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* SUPPORTED CLIENTS APPS BAR */
.clients-section {
  padding: 60px 0;
  background: #ffffff;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.clients-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2rem;
  margin-top: 1.5rem;
}

.client-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 1.2rem;
  background: #f8fafc;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-weight: 600;
  color: #334155;
  font-size: 0.95rem;
}

/* ARTICLES SECTION (SEO CONTENT HUB) */
.articles-section {
  padding: 90px 0;
  background: #ffffff;
}

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

.article-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-focus);
}

.article-tag {
  display: inline-block;
  padding: 0.2rem 0.7rem;
  background: rgba(124, 58, 237, 0.08);
  color: var(--accent-purple);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 4px;
  margin-bottom: 1rem;
  align-self: flex-start;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.8rem;
  line-height: 1.4;
}

.article-snippet {
  font-size: 0.9rem;
  color: var(--text-muted);
  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;
  border-top: 1px solid #f1f5f9;
  padding-top: 1rem;
  font-size: 0.82rem;
  color: var(--text-light);
}

.btn-read-article {
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  cursor: pointer;
}

.btn-read-article:hover {
  text-decoration: underline;
}

/* TESTIMONIALS SECTION (用户评价) */
.reviews-section {
  padding: 90px 0;
  background: var(--bg-main);
}

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

.review-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.review-stars {
  color: #f59e0b;
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.review-text {
  font-size: 0.95rem;
  color: #334155;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--primary-gradient);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}

.user-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
}

.user-badge {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* FAQ SECTION (常见问题FAQ) */
.faq-section {
  padding: 90px 0;
  background: #ffffff;
}

.faq-container {
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: var(--transition);
}

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

.faq-question {
  width: 100%;
  padding: 1.3rem 1.6rem;
  background: #ffffff;
  border: none;
  text-align: left;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--primary);
}

.faq-icon {
  transition: transform 0.3s ease;
  font-weight: 400;
  font-size: 1.2rem;
  color: var(--primary);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-in-out, padding 0.35s ease-in-out;
  padding: 0 1.6rem;
  background: #fafafa;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  padding: 0 1.6rem 1.4rem 1.6rem;
  max-height: 400px;
}

/* CTA CALLOUT BAR */
.cta-banner {
  padding: 70px 0;
  background: linear-gradient(135deg, #312e81 0%, #4f46e5 100%);
  color: #ffffff;
  text-align: center;
}

.cta-banner h2 {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.cta-banner p {
  font-size: 1.15rem;
  color: #e0e7ff;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ARTICLE READING MODAL */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(6px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  padding: 1.5rem;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-box {
  width: 100%;
  max-width: 860px;
  max-height: 88vh;
  background: #ffffff;
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  overflow-y: auto;
  padding: 2.5rem;
  position: relative;
}

.modal-close-btn {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: #f1f5f9;
  border: none;
  font-size: 1.2rem;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.modal-close-btn:hover {
  background: #e2e8f0;
  color: var(--text-main);
}

.modal-article-content {
  line-height: 1.8;
  color: #334155;
}

.modal-article-content h1 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 1rem;
}

.modal-article-content h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 1.8rem 0 0.8rem 0;
}

.modal-article-content p {
  margin-bottom: 1.2rem;
  font-size: 1rem;
}

.modal-article-content ul, .modal-article-content ol {
  margin: 1rem 0 1.2rem 1.5rem;
}

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

/* FOOTER & PBN LINK PIPELINE (核心任务 2 要求) */
footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 60px 0 30px 0;
  font-size: 0.9rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid #1e293b;
}

.footer-brand .brand-logo {
  color: #ffffff;
  margin-bottom: 1rem;
}

.footer-brand p {
  color: #64748b;
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.6rem;
}

.footer-col a {
  color: #94a3b8;
  text-decoration: none;
  transition: var(--transition);
}

.footer-col a:hover {
  color: #ffffff;
}

/* PBN Friendly Links Zone (页脚 PBN 权重输血管道 - 低调美观小字号) */
.pbn-link-pipeline {
  padding-top: 1.8rem;
  border-top: 1px stroke rgba(255, 255, 255, 0.05);
  margin-top: 1.5rem;
  text-align: center;
}

.pbn-title {
  font-size: 0.75rem;
  color: #475569;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 0.8rem;
  font-weight: 600;
}

.pbn-links-wrapper {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.6rem 1.2rem;
}

.pbn-link-item {
  font-size: 0.78rem;
  color: #64748b;
  text-decoration: none;
  transition: color 0.2s ease;
  white-space: nowrap;
}

.pbn-link-item:hover {
  color: #818cf8;
  text-decoration: underline;
}

.footer-bottom {
  text-align: center;
  padding-top: 1.5rem;
  color: #475569;
  font-size: 0.82rem;
}

/* RESPONSIVE DESIGN BREAKPOINTS */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 3rem;
  }
  
  .pricing-grid-row {
    overflow-x: auto;
    padding-bottom: 1rem;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
  }

  .pricing-card {
    min-width: 270px;
    scroll-snap-align: start;
  }

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

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

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

  .menu-toggle {
    display: block;
  }

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

  .hero-subtitle {
    font-size: 1rem;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .stat-item:nth-child(2)::after {
    display: none;
  }

  .features-grid, .articles-grid, .reviews-grid {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}