/* ========================================
   GEO优化官网 2026版 - 主样式文件
   白色主题 · 多语言支持 · 现代科技风
   ======================================== */

/* CSS Variables */
:root {
  /* Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  
  /* Brand Colors */
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --secondary: #10b981;
  --secondary-light: #34d399;
  --accent: #f59e0b;
  --accent-light: #fbbf24;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-secondary: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
  --gradient-hero: linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
  
  /* Spacing */
  --container-width: 1280px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
}

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

ul, ol {
  list-style: none;
}

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

/* Container */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ========================================
   HEADER
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  z-index: 1000;
  transition: var(--transition-normal);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

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

.logo-icon {
  width: 44px;
  height: 44px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

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

.logo-text h1 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.logo-text p {
  font-size: 12px;
  color: var(--text-tertiary);
  font-weight: 500;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-list {
  display: flex;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
  background: rgba(99, 102, 241, 0.08);
}

/* Language Selector */
.lang-selector {
  position: relative;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-secondary);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition-fast);
}

.lang-btn:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.lang-btn svg {
  width: 16px;
  height: 16px;
  transition: var(--transition-fast);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 200px;
  background: white;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: var(--transition-fast);
  z-index: 100;
}

.lang-selector:hover .lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  cursor: pointer;
}

.lang-option:first-child {
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.lang-option:last-child {
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.lang-option:hover {
  background: var(--bg-secondary);
  color: var(--primary);
}

.lang-option.active {
  background: rgba(99, 102, 241, 0.08);
  color: var(--primary);
  font-weight: 600;
}

.lang-option .flag {
  font-size: 18px;
}

/* CTA Button */
.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--gradient-primary);
  color: white;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.header-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-btn svg {
  width: 24px;
  height: 24px;
  color: var(--text-primary);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
  padding: 160px 0 80px;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(16, 185, 129, 0.06) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: white;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.hero-badge svg {
  width: 16px;
  height: 16px;
}

.hero h2 {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero h2 .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
  cursor: pointer;
  border: none;
}

.btn svg {
  width: 20px;
  height: 20px;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: white;
  color: var(--text-primary);
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

/* ========================================
   STATS SECTION
   ======================================== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 60px 0;
}

.stat-card {
  background: white;
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  transition: var(--transition-normal);
}

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

.stat-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-icon svg {
  width: 28px;
  height: 28px;
}

.stat-icon.primary {
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary);
}

.stat-icon.secondary {
  background: rgba(16, 185, 129, 0.1);
  color: var(--secondary);
}

.stat-icon.accent {
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent);
}

.stat-icon.purple {
  background: rgba(139, 92, 246, 0.1);
  color: #8b5cf6;
}

.stat-number {
  font-size: 40px;
  font-weight: 800;
  margin-bottom: 4px;
  letter-spacing: -0.02em;
}

.stat-number.primary { color: var(--primary); }
.stat-number.secondary { color: var(--secondary); }
.stat-number.accent { color: var(--accent); }
.stat-number.purple { color: #8b5cf6; }

.stat-label {
  font-size: 14px;
  color: var(--text-tertiary);
  font-weight: 500;
}

/* ========================================
   SITES SECTION
   ======================================== */
.sites-section {
  padding: 80px 0;
  background: var(--bg-secondary);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

.section-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.section-icon.primary { background: rgba(99, 102, 241, 0.1); color: var(--primary); }
.section-icon.secondary { background: rgba(16, 185, 129, 0.1); color: var(--secondary); }
.section-icon.accent { background: rgba(245, 158, 11, 0.1); color: var(--accent); }
.section-icon.purple { background: rgba(139, 92, 246, 0.1); color: #8b5cf6; }
.section-icon.cyan { background: rgba(6, 182, 212, 0.1); color: #06b6d4; }

.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
}

.section-count {
  font-size: 14px;
  color: var(--text-tertiary);
  background: var(--bg-tertiary);
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

/* Filter Tabs */
.filter-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.filter-tab {
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: white;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-fast);
}

.filter-tab:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.filter-tab.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* Sites Grid */
.sites-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}

/* Site Card */
.site-card {
  background: white;
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  min-height: 200px;
}

.site-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary);
}

.site-card-header {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
  flex: 1;
}

.site-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.site-icon.primary { background: rgba(99, 102, 241, 0.1); color: var(--primary); }
.site-icon.secondary { background: rgba(16, 185, 129, 0.1); color: var(--secondary); }
.site-icon.accent { background: rgba(245, 158, 11, 0.1); color: var(--accent); }
.site-icon.purple { background: rgba(139, 92, 246, 0.1); color: #8b5cf6; }
.site-icon.cyan { background: rgba(6, 182, 212, 0.1); color: #06b6d4; }
.site-icon.pink { background: rgba(236, 72, 153, 0.1); color: #ec4899; }

.site-info {
  flex: 1;
}

.site-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-tag {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
}

.site-tag.hot {
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent);
}

.site-tag.new {
  background: rgba(16, 185, 129, 0.1);
  color: var(--secondary);
}

.site-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.site-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.site-link {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-tertiary);
}

.site-link svg {
  width: 14px;
  height: 14px;
}

.site-arrow {
  width: 32px;
  height: 32px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  transition: var(--transition-fast);
}

.site-arrow svg {
  width: 16px;
  height: 16px;
}

.site-card:hover .site-arrow {
  background: var(--primary);
  color: white;
}

/* ========================================
   LANGUAGES SECTION
   ======================================== */
.languages-section {
  padding: 80px 0;
  background: white;
}

.languages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.lang-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: var(--bg-secondary);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
}

.lang-card:hover {
  background: white;
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.lang-card .flag {
  font-size: 24px;
}

.lang-card .lang-info {
  flex: 1;
}

.lang-card .lang-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.lang-card .lang-code {
  font-size: 12px;
  color: var(--text-tertiary);
}

.lang-card .lang-arrow {
  color: var(--text-tertiary);
  transition: var(--transition-fast);
}

.lang-card:hover .lang-arrow {
  color: var(--primary);
  transform: translateX(4px);
}

.lang-card .lang-arrow svg {
  width: 16px;
  height: 16px;
}

/* ========================================
   FEATURES SECTION
   ======================================== */
.features-section {
  padding: 80px 0;
  background: var(--bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: white;
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  transition: var(--transition-normal);
}

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

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.feature-icon svg {
  width: 32px;
  height: 32px;
}

.feature-card h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ========================================
   CTA SECTION
   ======================================== */
.cta-section {
  padding: 80px 0;
  background: var(--gradient-primary);
  text-align: center;
}

.cta-content h3 {
  font-size: 36px;
  font-weight: 700;
  color: white;
  margin-bottom: 16px;
}

.cta-content p {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 32px;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.btn-white {
  background: white;
  color: var(--primary);
  font-weight: 600;
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.btn-outline-white {
  background: transparent;
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: white;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  background: var(--text-primary);
  color: white;
  padding: 60px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .logo-icon {
  background: rgba(255, 255, 255, 0.2);
  margin-bottom: 16px;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  line-height: 1.7;
  margin-top: 12px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 20px;
  color: white;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition-fast);
}

.footer-col ul li a:hover {
  color: white;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  display: flex;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.7);
}

.footer-links a:hover {
  color: white;
}

.footer-links svg {
  width: 16px;
  height: 16px;
}

/* ========================================
   BACK TO TOP
   ======================================== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition-normal);
  box-shadow: var(--shadow-lg);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

.back-to-top svg {
  width: 24px;
  height: 24px;
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.animate-fadeInUp {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-fadeIn {
  animation: fadeIn 0.4s ease forwards;
}

/* Stagger animations for children */
.stagger-children > *:nth-child(1) { animation-delay: 0ms; }
.stagger-children > *:nth-child(2) { animation-delay: 100ms; }
.stagger-children > *:nth-child(3) { animation-delay: 200ms; }
.stagger-children > *:nth-child(4) { animation-delay: 300ms; }
.stagger-children > *:nth-child(5) { animation-delay: 400ms; }
.stagger-children > *:nth-child(6) { animation-delay: 500ms; }

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
  .hero h2 {
    font-size: 44px;
  }
  
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .sites-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .languages-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }
  
  .nav-list {
    display: none;
  }
  
  .header-cta {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .hero {
    padding: 120px 0 60px;
  }
  
  .hero h2 {
    font-size: 32px;
  }
  
  .hero p {
    font-size: 16px;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .stats {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 40px 0;
  }
  
  .stat-card {
    display: flex;
    align-items: center;
    text-align: left;
    padding: 20px;
  }
  
  .stat-icon {
    margin: 0;
    margin-right: 16px;
  }
  
  .stat-info {
    flex: 1;
  }
  
  .stat-number {
    font-size: 28px;
  }
  
  .sites-grid {
    grid-template-columns: 1fr;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .languages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
  
  .cta-content h3 {
    font-size: 28px;
  }
  
  .cta-buttons {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .hero h2 {
    font-size: 28px;
  }
  
  .filter-tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }
  
  .filter-tab {
    white-space: nowrap;
  }
  
  .languages-grid {
    grid-template-columns: 1fr;
  }
}

/* RTL Support for Arabic */
[dir="rtl"] {
  text-align: right;
}

[dir="rtl"] .hero-buttons {
  flex-direction: row-reverse;
}

[dir="rtl"] .site-card-header {
  flex-direction: row-reverse;
}

[dir="rtl"] .site-card-footer {
  flex-direction: row-reverse;
}

[dir="rtl"] .footer-bottom {
  flex-direction: row-reverse;
}