/* =============================================
   91网 - 现代极简高端视频论坛样式
   Modern Minimal High-end Style
   ============================================= */

/* CSS Variables */
:root {
  --primary: #1a2744;
  --primary-light: #243560;
  --accent: #c9a84c;
  --accent-light: #e0c06a;
  --text-primary: #1a1a2e;
  --text-secondary: #555577;
  --text-muted: #8888aa;
  --bg-white: #ffffff;
  --bg-light: #f8f9fc;
  --bg-section: #f2f4f8;
  --border: #e8eaf0;
  --border-light: #f0f2f8;
  --shadow-sm: 0 2px 8px rgba(26,39,68,0.06);
  --shadow-md: 0 8px 32px rgba(26,39,68,0.10);
  --shadow-lg: 0 16px 48px rgba(26,39,68,0.14);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
  --font-sans: 'PingFang SC','Noto Sans SC','Microsoft YaHei',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: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* =============================================
   HEADER & NAVIGATION
   ============================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  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 {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: -1px;
  box-shadow: 0 4px 12px rgba(26,39,68,0.25);
}
.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.5px;
}
.logo-text span { color: var(--accent); }

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background: var(--bg-light);
}
.nav-link.active { color: var(--accent); font-weight: 600; }

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.btn-post {
  padding: 9px 20px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(26,39,68,0.2);
}
.btn-post:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(26,39,68,0.3);
}

/* Search Bar */
.search-bar {
  background: var(--bg-section);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}
.search-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-form {
  display: flex;
  align-items: center;
  background: var(--bg-white);
  border: 1.5px solid var(--border);
  border-radius: 40px;
  padding: 0 20px;
  gap: 10px;
  width: 100%;
  max-width: 600px;
  transition: var(--transition);
}
.search-form:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,39,68,0.08);
}
.search-form input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 14px;
  color: var(--text-primary);
  padding: 10px 0;
  font-family: var(--font-sans);
}
.search-form input::placeholder { color: var(--text-muted); }
.search-icon {
  color: var(--text-muted);
  font-size: 16px;
  display: flex;
  align-items: center;
}
.search-btn {
  padding: 8px 20px;
  background: var(--primary);
  color: #fff;
  border-radius: 40px;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
  flex-shrink: 0;
}
.search-btn:hover { background: var(--primary-light); }
.search-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.search-tag {
  padding: 4px 12px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}
.search-tag:hover { border-color: var(--primary); color: var(--primary); }

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* =============================================
   HERO BANNER
   ============================================= */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary) 0%, #0d1b3e 60%, #1a2744 100%);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero-banner.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.22;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,39,68,0.92) 0%, rgba(13,27,62,0.85) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(201,168,76,0.15);
  border: 1px solid rgba(201,168,76,0.3);
  border-radius: 40px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 24px;
}
.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}
.hero-title {
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 20px;
}
.hero-title .highlight { color: var(--accent); }
.hero-desc {
  font-size: 17px;
  color: rgba(255,255,255,0.72);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 480px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-primary {
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
  color: var(--primary);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 700;
  transition: var(--transition);
  box-shadow: 0 6px 24px rgba(201,168,76,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(201,168,76,0.45);
}
.btn-outline {
  padding: 14px 32px;
  border: 1.5px solid rgba(255,255,255,0.3);
  color: rgba(255,255,255,0.9);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-outline:hover {
  border-color: rgba(255,255,255,0.7);
  background: rgba(255,255,255,0.08);
}
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 40px;
}
.hero-stat { text-align: center; }
.hero-stat .num {
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
  display: block;
  line-height: 1;
}
.hero-stat .label {
  font-size: 12px;
  color: rgba(255,255,255,0.55);
  margin-top: 4px;
}
.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.hero-video-card {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  overflow: hidden;
  backdrop-filter: blur(8px);
  transition: var(--transition);
}
.hero-video-card:hover { transform: translateY(-4px); }
.hero-video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.hero-video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.hero-video-card:hover .hero-video-thumb img { transform: scale(1.05); }
.play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.3);
  opacity: 0;
  transition: var(--transition);
}
.hero-video-card:hover .play-overlay { opacity: 1; }
.play-btn {
  width: 52px;
  height: 52px;
  background: rgba(255,255,255,0.95);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  transition: var(--transition);
}
.play-btn svg { width: 20px; height: 20px; fill: var(--primary); margin-left: 3px; }
.play-btn:hover { transform: scale(1.1); }
.hero-video-info {
  padding: 12px 16px;
}
.hero-video-info h4 {
  font-size: 13px;
  font-weight: 600;
  color: rgba(255,255,255,0.9);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.hero-video-meta {
  display: flex;
  gap: 12px;
  font-size: 11px;
  color: rgba(255,255,255,0.5);
}

/* =============================================
   SECTION COMMON
   ============================================= */
.section {
  padding: 80px 0;
}
.section-alt { background: var(--bg-light); }
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-label {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(26,39,68,0.06);
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  line-height: 1.3;
  margin-bottom: 14px;
}
.section-title .accent { color: var(--accent); }
.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.8;
}

/* =============================================
   VIDEO CARDS
   ============================================= */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.video-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--border);
}
.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;
  loading: lazy;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.35);
  opacity: 0;
  transition: var(--transition);
}
.video-card:hover .video-play-btn { opacity: 1; }
.v-play-icon {
  width: 48px;
  height: 48px;
  background: rgba(255,255,255,0.95);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.25);
  transition: transform 0.2s;
}
.v-play-icon:hover { transform: scale(1.12); }
.v-play-icon svg { width: 18px; height: 18px; fill: var(--primary); margin-left: 3px; }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.72);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--accent);
  color: var(--primary);
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}
.video-info {
  padding: 16px;
}
.video-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
}
.video-stats {
  display: flex;
  gap: 12px;
}
.video-stat-item {
  display: flex;
  align-items: center;
  gap: 4px;
}
.video-stat-item svg { width: 12px; height: 12px; }

/* =============================================
   CATEGORIES GRID
   ============================================= */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.category-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transition: var(--transition);
}
.category-card:hover::before { transform: scaleX(1); }
.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border);
}
.category-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--bg-section), var(--bg-light));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 26px;
  transition: var(--transition);
}
.category-card:hover .category-icon {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
}
.category-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.category-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
}
.category-count {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

/* =============================================
   HOT TOPICS
   ============================================= */
.topics-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.topic-item {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 20px 24px;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  transition: var(--transition);
  cursor: pointer;
}
.topic-item:hover {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
  transform: translateX(4px);
}
.topic-rank {
  font-size: 24px;
  font-weight: 900;
  color: var(--border);
  text-align: center;
  line-height: 1;
}
.topic-item:nth-child(1) .topic-rank { color: #e8b84b; }
.topic-item:nth-child(2) .topic-rank { color: #b0b8c8; }
.topic-item:nth-child(3) .topic-rank { color: #c4845a; }
.topic-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
  transition: var(--transition);
}
.topic-item:hover .topic-title { color: var(--primary); }
.topic-meta {
  display: flex;
  gap: 16px;
  font-size: 12px;
  color: var(--text-muted);
}
.topic-meta span { display: flex; align-items: center; gap: 4px; }
.topic-tag {
  padding: 4px 12px;
  background: var(--bg-section);
  border-radius: 20px;
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* =============================================
   STATS SECTION
   ============================================= */
.stats-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  padding: 72px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}
.stat-item {}
.stat-number {
  font-size: clamp(36px, 4vw, 52px);
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
  display: block;
  margin-bottom: 8px;
}
.stat-label {
  font-size: 14px;
  color: rgba(255,255,255,0.65);
  font-weight: 500;
}
.stat-divider {
  width: 1px;
  background: rgba(255,255,255,0.1);
}

/* =============================================
   TESTIMONIALS
   ============================================= */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.testimonial-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: var(--transition);
}
.testimonial-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.testimonial-stars {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
}
.star { color: var(--accent); font-size: 16px; }
.testimonial-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
  font-style: italic;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
}
.author-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}
.author-role {
  font-size: 12px;
  color: var(--text-muted);
}

/* =============================================
   FAQ SECTION
   ============================================= */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  transition: var(--transition);
  gap: 16px;
}
.faq-question:hover { color: var(--primary); }
.faq-item.open .faq-question { color: var(--primary); }
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
  color: var(--text-muted);
  font-size: 18px;
  line-height: 1;
}
.faq-item.open .faq-icon {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4,0,0.2,1);
}
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
}

/* =============================================
   JOIN / CONTACT SECTION
   ============================================= */
.join-section {
  background: linear-gradient(135deg, var(--primary) 0%, #0d1b3e 100%);
  padding: 80px 0;
  text-align: center;
}
.join-section .section-title { color: #fff; }
.join-section .section-desc { color: rgba(255,255,255,0.65); }
.join-form {
  display: flex;
  gap: 12px;
  max-width: 480px;
  margin: 36px auto 0;
}
.join-input {
  flex: 1;
  padding: 14px 20px;
  background: rgba(255,255,255,0.1);
  border: 1.5px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 14px;
  font-family: var(--font-sans);
  outline: none;
  transition: var(--transition);
}
.join-input::placeholder { color: rgba(255,255,255,0.45); }
.join-input:focus { border-color: var(--accent); background: rgba(255,255,255,0.15); }
.join-submit {
  padding: 14px 28px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: var(--primary);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 700;
  transition: var(--transition);
  white-space: nowrap;
}
.join-submit:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(201,168,76,0.4); }

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
  background: var(--primary);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .logo-text { color: #fff; font-size: 22px; margin-bottom: 16px; display: block; }
.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255,255,255,0.55);
  margin-bottom: 24px;
}
.footer-social {
  display: flex;
  gap: 10px;
}
.social-btn {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.08);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: var(--transition);
  cursor: pointer;
}
.social-btn:hover { background: var(--accent); color: var(--primary); }
.footer-col-title {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-link {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  transition: var(--transition);
  cursor: pointer;
}
.footer-link:hover { color: var(--accent); }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copy {
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}
.footer-copy a { color: var(--accent); }
.footer-update {
  font-size: 12px;
  color: rgba(255,255,255,0.35);
}

/* =============================================
   BREADCRUMB
   ============================================= */
.breadcrumb {
  background: var(--bg-light);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.breadcrumb-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}
.breadcrumb-inner a { color: var(--text-secondary); transition: var(--transition); }
.breadcrumb-inner a:hover { color: var(--primary); }
.breadcrumb-sep { color: var(--border); }

/* =============================================
   PAGE HERO (Inner Pages)
   ============================================= */
.page-hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  padding: 60px 0;
  text-align: center;
}
.page-hero h1 {
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}
.page-hero p {
  font-size: 16px;
  color: rgba(255,255,255,0.65);
  max-width: 560px;
  margin: 0 auto;
}

/* =============================================
   SIDEBAR LAYOUT
   ============================================= */
.content-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  padding: 48px 0;
}
.sidebar {}
.sidebar-widget {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
}
.widget-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

/* =============================================
   MOBILE RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(3, 1fr); }
  .categories-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { display: none; }
}

@media (max-width: 768px) {
  .main-nav { display: none; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    padding: 16px;
    gap: 4px;
    z-index: 999;
    box-shadow: var(--shadow-md);
  }
  .menu-toggle { display: flex; }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .categories-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonials-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .content-layout { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .hero-content { padding: 48px 24px; }
  .section { padding: 56px 0; }
  .join-form { flex-direction: column; }
  .topic-item { grid-template-columns: 40px 1fr; }
  .topic-tag { display: none; }
  .search-tags { display: none; }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .categories-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; }
  .header-inner { gap: 16px; }
  .btn-post { padding: 8px 14px; font-size: 13px; }
}

/* =============================================
   ANIMATIONS
   ============================================= */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in-up {
  animation: fadeInUp 0.6s cubic-bezier(0.4,0,0.2,1) both;
}
.fade-in-up:nth-child(2) { animation-delay: 0.1s; }
.fade-in-up:nth-child(3) { animation-delay: 0.2s; }
.fade-in-up:nth-child(4) { animation-delay: 0.3s; }

/* Lazy load placeholder */
img[loading="lazy"] {
  background: var(--bg-section);
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-light); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* Selection */
::selection { background: rgba(26,39,68,0.12); color: var(--primary); }