/* =============================================
   91网 - 现代极简高端风格主样式
   Modern Minimal High-end Design System
   ============================================= */

/* --- CSS Variables --- */
:root {
  --primary: #1a1f36;
  --primary-light: #2d3561;
  --accent: #4f6ef7;
  --accent-hover: #3a57e8;
  --text-primary: #1a1f36;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --bg-white: #ffffff;
  --bg-light: #f8f9fc;
  --bg-section: #f3f4f8;
  --border: #e5e7eb;
  --border-light: #f0f1f5;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.06);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea { font-family: inherit; }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; letter-spacing: -0.02em; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }
p { color: var(--text-secondary); line-height: 1.75; }

/* --- Layout --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-sm { padding: 48px 0; }

/* =============================================
   HEADER / NAVIGATION
   ============================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}
.site-header.scrolled { box-shadow: var(--shadow-sm); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
}
.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.03em;
}
.logo-text span { color: var(--accent); }

/* Main Nav */
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  padding: 6px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--primary);
  background: var(--bg-section);
}

/* Header Actions */
.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.btn-post {
  padding: 8px 20px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-post:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(79,110,247,0.3); }

/* Mobile Menu Toggle */
.menu-toggle { display: none; flex-direction: column; gap: 5px; padding: 4px; }
.menu-toggle span { display: block; width: 22px; height: 2px; background: var(--primary); border-radius: 2px; transition: var(--transition); }

/* =============================================
   SEARCH BAR
   ============================================= */
.search-bar-wrap {
  background: var(--bg-light);
  border-bottom: 1px solid var(--border-light);
  padding: 12px 0;
}
.search-form {
  display: flex;
  align-items: center;
  max-width: 640px;
  margin: 0 auto;
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: 50px;
  overflow: hidden;
  transition: var(--transition);
}
.search-form:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(79,110,247,0.12); }
.search-form input {
  flex: 1;
  padding: 10px 20px;
  font-size: 0.9rem;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text-primary);
}
.search-form input::placeholder { color: var(--text-muted); }
.search-form button {
  padding: 10px 22px;
  background: var(--accent);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  transition: var(--transition);
}
.search-form button:hover { background: var(--accent-hover); }

/* =============================================
   HERO BANNER
   ============================================= */
.hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, #1a1f36 0%, #2d3561 50%, #1e2d5a 100%);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../assets/images/hero_banner.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.18;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,31,54,0.92) 0%, rgba(45,53,97,0.85) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 80px 0;
  max-width: 680px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(79,110,247,0.2);
  border: 1px solid rgba(79,110,247,0.4);
  border-radius: 50px;
  font-size: 0.8rem;
  color: #a5b4fc;
  font-weight: 500;
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}
.hero h1 {
  color: #fff;
  margin-bottom: 20px;
  font-size: clamp(2rem, 5vw, 3.2rem);
}
.hero h1 span { color: #818cf8; }
.hero p {
  color: rgba(255,255,255,0.7);
  font-size: 1.1rem;
  margin-bottom: 36px;
  max-width: 520px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 700;
  transition: var(--transition);
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(79,110,247,0.4); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: rgba(255,255,255,0.1);
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.25);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  transition: var(--transition);
}
.btn-secondary:hover { background: rgba(255,255,255,0.18); border-color: rgba(255,255,255,0.4); }
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.hero-stat-item .num { font-size: 1.75rem; font-weight: 800; color: #fff; }
.hero-stat-item .label { font-size: 0.8rem; color: rgba(255,255,255,0.5); margin-top: 2px; }

/* =============================================
   SECTION HEADERS
   ============================================= */
.section-header { text-align: center; margin-bottom: 56px; }
.section-header .tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(79,110,247,0.08);
  color: var(--accent);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.section-header h2 { color: var(--primary); margin-bottom: 12px; }
.section-header p { max-width: 520px; margin: 0 auto; font-size: 1rem; }

/* =============================================
   VIDEO CARDS
   ============================================= */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.video-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}
.video-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-section);
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.05); }
.play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: var(--transition);
}
.video-card:hover .play-overlay { background: rgba(0,0,0,0.35); }
.play-btn {
  width: 52px;
  height: 52px;
  background: rgba(255,255,255,0.95);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}
.video-card:hover .play-btn { opacity: 1; transform: scale(1); }
.play-btn svg { width: 20px; height: 20px; fill: var(--accent); margin-left: 3px; }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}
.video-info { padding: 16px; }
.video-tag {
  display: inline-block;
  padding: 2px 10px;
  background: rgba(79,110,247,0.08);
  color: var(--accent);
  border-radius: 50px;
  font-size: 0.72rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.video-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-meta svg { width: 13px; height: 13px; }

/* =============================================
   CATEGORIES GRID
   ============================================= */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.category-card {
  padding: 28px 24px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--border-light);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.category-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transition: var(--transition);
}
.category-card:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.category-card:hover::before { transform: scaleX(1); }
.category-icon {
  width: 48px;
  height: 48px;
  background: rgba(79,110,247,0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.5rem;
}
.category-card h3 { font-size: 1rem; font-weight: 700; color: var(--primary); margin-bottom: 6px; }
.category-card p { font-size: 0.82rem; color: var(--text-muted); line-height: 1.5; }
.category-count { font-size: 0.78rem; color: var(--accent); font-weight: 600; margin-top: 12px; }

/* =============================================
   HOT TOPICS
   ============================================= */
.topics-list { display: flex; flex-direction: column; gap: 2px; }
.topic-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  transition: var(--transition);
  cursor: pointer;
}
.topic-item:hover { background: var(--bg-light); }
.topic-rank {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--text-muted);
  flex-shrink: 0;
}
.topic-rank.top3 { color: var(--accent); }
.topic-content { flex: 1; min-width: 0; }
.topic-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
}
.topic-meta { font-size: 0.78rem; color: var(--text-muted); display: flex; gap: 12px; }
.topic-stats { display: flex; gap: 16px; flex-shrink: 0; }
.topic-stat { font-size: 0.78rem; color: var(--text-muted); display: flex; align-items: center; gap: 4px; }

/* =============================================
   STATS SECTION
   ============================================= */
.stats-section { background: var(--primary); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  text-align: center;
}
.stat-item .num {
  font-size: 2.5rem;
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.03em;
  line-height: 1;
}
.stat-item .num span { color: #818cf8; }
.stat-item .label { font-size: 0.9rem; color: rgba(255,255,255,0.5); margin-top: 8px; }

/* =============================================
   REVIEWS
   ============================================= */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.review-card {
  padding: 28px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.review-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.review-stars { color: #f59e0b; font-size: 1rem; margin-bottom: 14px; letter-spacing: 2px; }
.review-text { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 20px; }
.review-author { display: flex; align-items: center; gap: 12px; }
.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #818cf8);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
}
.review-name { font-size: 0.875rem; font-weight: 700; color: var(--primary); }
.review-role { font-size: 0.78rem; color: var(--text-muted); }

/* =============================================
   FAQ
   ============================================= */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: #fff;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(79,110,247,0.08); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  gap: 16px;
}
.faq-question h4 { font-size: 0.95rem; font-weight: 700; color: var(--primary); flex: 1; }
.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-section);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
}
.faq-item.open .faq-icon { background: var(--accent); transform: rotate(45deg); }
.faq-icon svg { width: 14px; height: 14px; fill: var(--text-secondary); }
.faq-item.open .faq-icon svg { fill: #fff; }
.faq-answer { padding: 0 24px 20px; display: none; }
.faq-item.open .faq-answer { display: block; }
.faq-answer p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.75; }

/* =============================================
   JOIN / CTA SECTION
   ============================================= */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  text-align: center;
}
.cta-section h2 { color: #fff; margin-bottom: 16px; }
.cta-section p { color: rgba(255,255,255,0.65); max-width: 480px; margin: 0 auto 36px; }
.cta-form {
  display: flex;
  gap: 12px;
  max-width: 480px;
  margin: 0 auto;
  flex-wrap: wrap;
  justify-content: center;
}
.cta-form input {
  flex: 1;
  min-width: 200px;
  padding: 14px 20px;
  border-radius: var(--radius-md);
  border: 1.5px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.08);
  color: #fff;
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}
.cta-form input::placeholder { color: rgba(255,255,255,0.4); }
.cta-form input:focus { border-color: rgba(255,255,255,0.5); background: rgba(255,255,255,0.12); }
.cta-form button {
  padding: 14px 28px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 700;
  transition: var(--transition);
}
.cta-form button:hover { background: var(--accent-hover); transform: translateY(-1px); }

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
  background: #0f1220;
  color: rgba(255,255,255,0.6);
  padding: 60px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .logo-text { color: #fff; font-size: 1.4rem; }
.footer-brand p { font-size: 0.875rem; margin-top: 12px; line-height: 1.7; max-width: 280px; }
.footer-col h5 { font-size: 0.875rem; font-weight: 700; color: #fff; margin-bottom: 16px; letter-spacing: 0.05em; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a { font-size: 0.85rem; transition: var(--transition); }
.footer-col ul li a:hover { color: #fff; }
.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: 0.82rem; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { font-size: 0.82rem; transition: var(--transition); }
.footer-links a:hover { color: #fff; }
.social-links { display: flex; gap: 12px; margin-top: 16px; }
.social-link {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
}
.social-link:hover { background: var(--accent); color: #fff; }

/* =============================================
   INNER PAGE STYLES
   ============================================= */
.page-hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  padding: 60px 0;
  text-align: center;
}
.page-hero h1 { color: #fff; margin-bottom: 12px; }
.page-hero p { color: rgba(255,255,255,0.65); max-width: 520px; margin: 0 auto; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 16px;
  justify-content: center;
}
.breadcrumb a { color: rgba(255,255,255,0.5); transition: var(--transition); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span { color: rgba(255,255,255,0.3); }

/* Post/Article Card */
.post-card {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  overflow: hidden;
  transition: var(--transition);
}
.post-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.post-card-body { padding: 20px; }
.post-tag {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(79,110,247,0.08);
  color: var(--accent);
  border-radius: 50px;
  font-size: 0.72rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.post-title { font-size: 1rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; line-height: 1.4; }
.post-excerpt { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 14px; }
.post-meta { display: flex; align-items: center; justify-content: space-between; font-size: 0.78rem; color: var(--text-muted); }

/* Sidebar */
.sidebar-widget {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  padding: 24px;
  margin-bottom: 24px;
}
.sidebar-widget h4 { font-size: 0.95rem; font-weight: 700; color: var(--primary); margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px solid var(--bg-section); }
.sidebar-list { display: flex; flex-direction: column; gap: 12px; }
.sidebar-list li { font-size: 0.875rem; color: var(--text-secondary); cursor: pointer; transition: var(--transition); }
.sidebar-list li:hover { color: var(--accent); }

/* =============================================
   UTILITIES
   ============================================= */
.text-center { text-align: center; }
.text-accent { color: var(--accent); }
.bg-light { background: var(--bg-light); }
.bg-section { background: var(--bg-section); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-24 { margin-bottom: 24px; }
.divider { height: 1px; background: var(--border-light); margin: 40px 0; }
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 50px;
  font-size: 0.72rem;
  font-weight: 700;
}
.badge-hot { background: #fef2f2; color: #ef4444; }
.badge-new { background: #f0fdf4; color: #22c55e; }
.badge-video { background: rgba(79,110,247,0.08); color: var(--accent); }

/* =============================================
   MOBILE RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .section { padding: 56px 0; }
  .main-nav { display: none; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    gap: 4px;
    z-index: 999;
  }
  .main-nav.open a { padding: 10px 14px; }
  .menu-toggle { display: flex; }
  .header-actions .btn-post { display: none; }
  .hero-stats { gap: 24px; }
  .hero-stat-item .num { font-size: 1.4rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .hero-actions { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-wrap: wrap; gap: 20px; }
  .categories-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-form { flex-direction: column; }
  .cta-form input { min-width: unset; }
}

/* =============================================
   ANIMATIONS
   ============================================= */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.animate-fade-in { animation: fadeIn 0.6s ease forwards; }
.animate-fade-up { animation: fadeInUp 0.6s ease forwards; }
.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }

/* Lazy load images */
img[loading="lazy"] { opacity: 0; transition: opacity 0.3s ease; }
img[loading="lazy"].loaded { opacity: 1; }