/* ========================================
   四虎 - 主样式文件
   Brand: 四虎 | Domain: y01onn.cn
   ======================================== */

/* CSS 变量 */
:root {
  --primary: #E8336D;
  --primary-dark: #c0265a;
  --primary-light: #FF6B9D;
  --secondary: #7B2FBE;
  --secondary-light: #9B59D6;
  --accent: #FF8C42;
  --dark: #0d0a14;
  --dark2: #1a1025;
  --dark3: #241535;
  --card-bg: #1e1230;
  --text: #f0e8ff;
  --text-muted: #a89bc2;
  --border: rgba(232,51,109,0.2);
  --gradient-main: linear-gradient(135deg, #E8336D 0%, #7B2FBE 100%);
  --gradient-card: linear-gradient(180deg, rgba(30,18,48,0.95) 0%, rgba(13,10,20,0.98) 100%);
  --shadow: 0 8px 32px rgba(232,51,109,0.15);
  --radius: 12px;
  --radius-lg: 20px;
}

/* 重置 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', '微软雅黑', 'Hiragino Sans GB', sans-serif;
  background: var(--dark);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color 0.3s; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* 滚动条 */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--dark2); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

/* ========== 顶部公告条 ========== */
.top-bar {
  background: var(--gradient-main);
  text-align: center;
  padding: 8px 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
}
.top-bar a { color: #fff; text-decoration: underline; margin-left: 8px; }

/* ========== 头部导航 ========== */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13,10,20,0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 20px rgba(0,0,0,0.5);
}
.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}
.logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-wrap img.site-logo {
  height: 40px;
  width: auto;
  object-fit: contain;
}
.logo-text {
  font-size: 20px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.main-nav a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  transition: all 0.3s;
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active {
  color: #fff;
  background: rgba(232,51,109,0.15);
}
.main-nav a.active { color: var(--primary-light); }

/* 搜索框 */
.search-wrap {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 6px 16px;
  gap: 8px;
  min-width: 200px;
  transition: border-color 0.3s;
}
.search-wrap:focus-within { border-color: var(--primary); }
.search-wrap input {
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 14px;
  width: 100%;
}
.search-wrap input::placeholder { color: var(--text-muted); }
.search-wrap button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 16px;
  padding: 0;
  transition: color 0.3s;
}
.search-wrap button:hover { color: var(--primary); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.btn-login {
  padding: 8px 20px;
  border-radius: 20px;
  border: 1px solid var(--primary);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}
.btn-login:hover { background: var(--primary); color: #fff; }
.btn-join {
  padding: 8px 20px;
  border-radius: 20px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: opacity 0.3s;
}
.btn-join:hover { opacity: 0.85; }

/* 汉堡菜单 */
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: all 0.3s; }

/* ========== 英雄区 ========== */
.hero {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero_banner.jpg');
  background-size: cover;
  background-position: center;
  filter: brightness(0.45);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(13,10,20,0.9) 40%, rgba(13,10,20,0.3) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1400px;
  margin: 0 auto;
  padding: 60px 20px;
  max-width: 680px;
  margin-left: 10%;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(232,51,109,0.2);
  border: 1px solid var(--primary);
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 12px;
  color: var(--primary-light);
  margin-bottom: 20px;
  font-weight: 600;
  letter-spacing: 1px;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.5);
}
.hero h1 span { color: var(--primary-light); }
.hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 32px;
  line-height: 1.8;
  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(--gradient-main);
  color: #fff;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
  box-shadow: 0 4px 20px rgba(232,51,109,0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(232,51,109,0.5); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: rgba(255,255,255,0.1);
  color: #fff;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.3);
  cursor: pointer;
  transition: all 0.3s;
  backdrop-filter: blur(10px);
}
.btn-outline:hover { background: rgba(255,255,255,0.2); }
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
}
.stat-item { text-align: left; }
.stat-num {
  font-size: 28px;
  font-weight: 900;
  color: var(--primary-light);
  display: block;
}
.stat-label { font-size: 13px; color: var(--text-muted); }

/* ========== 通用容器 ========== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
}
.section { padding: 64px 0; }
.section-alt { background: var(--dark2); }

/* 区块标题 */
.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 36px;
  gap: 16px;
}
.section-title-wrap { flex: 1; }
.section-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.section-title {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
}
.section-title span { color: var(--primary-light); }
.section-desc {
  font-size: 15px;
  color: var(--text-muted);
  margin-top: 8px;
}
.view-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary-light);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: gap 0.3s;
}
.view-more:hover { gap: 10px; }

/* ========== 视频卡片 ========== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.video-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}
.video-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
  border: 1px solid rgba(255,255,255,0.05);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: var(--border);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.video-card:hover .video-thumb img { transform: scale(1.05); }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}
.play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: background 0.3s;
}
.video-card:hover .play-overlay { background: rgba(0,0,0,0.35); }
.play-btn-circle {
  width: 52px;
  height: 52px;
  background: rgba(232,51,109,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.3s;
}
.video-card:hover .play-btn-circle { opacity: 1; transform: scale(1); }
.play-btn-circle svg { width: 20px; height: 20px; fill: #fff; margin-left: 3px; }
.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
}
.video-info { padding: 14px; }
.video-title {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  line-height: 1.5;
  margin-bottom: 10px;
  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-author {
  display: flex;
  align-items: center;
  gap: 6px;
}
.author-avatar {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: #fff;
  font-weight: 700;
  flex-shrink: 0;
}
.video-stats {
  display: flex;
  gap: 12px;
  font-size: 12px;
  color: var(--text-muted);
}
.video-stats span { display: flex; align-items: center; gap: 3px; }

/* ========== 轮播Banner ========== */
.banner-slider {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16/5;
  background: var(--dark3);
}
.banner-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s;
}
.banner-slide.active { opacity: 1; }
.banner-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.banner-slide-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 40px;
  background: linear-gradient(0deg, rgba(0,0,0,0.85) 0%, transparent 100%);
}
.banner-dots {
  position: absolute;
  bottom: 16px;
  right: 20px;
  display: flex;
  gap: 6px;
  z-index: 10;
}
.banner-dot {
  width: 8px;
  height: 8px;
  border-radius: 4px;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: all 0.3s;
}
.banner-dot.active { background: var(--primary); width: 24px; }

/* ========== 分类标签栏 ========== */
.category-tabs {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 4px;
  margin-bottom: 28px;
  scrollbar-width: none;
}
.category-tabs::-webkit-scrollbar { display: none; }
.cat-tab {
  flex-shrink: 0;
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-muted);
  background: rgba(255,255,255,0.04);
  transition: all 0.3s;
}
.cat-tab:hover, .cat-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ========== 专家展示 ========== */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.expert-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.3s;
}
.expert-card:hover {
  border-color: var(--border);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 14px;
  object-fit: cover;
  border: 3px solid var(--primary);
}
.expert-name {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}
.expert-role {
  font-size: 13px;
  color: var(--primary-light);
  margin-bottom: 10px;
}
.expert-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}
.expert-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
}
.btn-sm {
  padding: 6px 14px;
  border-radius: 16px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}
.btn-sm-primary {
  background: var(--primary);
  color: #fff;
  border: none;
}
.btn-sm-outline {
  background: transparent;
  color: var(--primary-light);
  border: 1px solid var(--primary);
}
.btn-sm-primary:hover { background: var(--primary-dark); }
.btn-sm-outline:hover { background: rgba(232,51,109,0.1); }

/* ========== 合作品牌墙 ========== */
.partner-row {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
}
.partner-item {
  background: var(--card-bg);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 16px 28px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-muted);
  transition: all 0.3s;
  cursor: pointer;
}
.partner-item:hover {
  color: #fff;
  border-color: var(--border);
  background: rgba(232,51,109,0.08);
}

/* ========== FAQ ========== */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--card-bg);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.3s;
}
.faq-item.open { border-color: var(--border); }
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  gap: 16px;
}
.faq-q:hover { color: var(--primary-light); }
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(232,51,109,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.3s, background 0.3s;
  font-size: 16px;
  color: var(--primary);
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--primary); color: #fff; }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  padding: 0 20px;
}
.faq-item.open .faq-a { max-height: 300px; padding: 0 20px 18px; }

/* ========== 用户评价 ========== */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--card-bg);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 24px;
  transition: all 0.3s;
}
.review-card:hover {
  border-color: var(--border);
  box-shadow: var(--shadow);
}
.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.review-user { flex: 1; }
.review-name {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
}
.review-date { font-size: 12px; color: var(--text-muted); }
.review-stars { color: #FFB800; font-size: 14px; margin-bottom: 10px; }
.review-text { font-size: 14px; color: var(--text-muted); line-height: 1.7; }
.review-tag {
  display: inline-block;
  margin-top: 10px;
  padding: 3px 10px;
  background: rgba(232,51,109,0.1);
  border-radius: 10px;
  font-size: 12px;
  color: var(--primary-light);
}

/* ========== 联系我们 ========== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info-list { display: flex; flex-direction: column; gap: 16px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.06);
}
.contact-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(232,51,109,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.contact-label { font-size: 12px; color: var(--text-muted); margin-bottom: 2px; }
.contact-value { font-size: 15px; font-weight: 600; color: #fff; }
.qr-row {
  display: flex;
  gap: 24px;
  justify-content: center;
}
.qr-item { text-align: center; }
.qr-item img {
  width: 140px;
  height: 140px;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  object-fit: cover;
}
.qr-label { font-size: 13px; color: var(--text-muted); margin-top: 8px; }

/* ========== 社交分享 ========== */
.share-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.share-label { font-size: 14px; color: var(--text-muted); }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: opacity 0.3s;
}
.share-btn:hover { opacity: 0.85; }
.share-wechat { background: #07C160; color: #fff; }
.share-weibo { background: #E6162D; color: #fff; }
.share-douyin { background: #010101; color: #fff; border: 1px solid #333; }
.share-bilibili { background: #00A1D6; color: #fff; }

/* ========== 底部 ========== */
.footer {
  background: var(--dark2);
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo-text { font-size: 22px; margin-bottom: 12px; display: block; }
.footer-desc { font-size: 14px; color: var(--text-muted); line-height: 1.8; margin-bottom: 20px; }
.footer-social { display: flex; gap: 10px; }
.social-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: all 0.3s;
  cursor: pointer;
}
.social-icon:hover { background: var(--primary); border-color: var(--primary); }
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color 0.3s;
}
.footer-links a:hover { color: var(--primary-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); transition: color 0.3s; }
.footer-bottom a:hover { color: var(--primary-light); }

/* ========== 面包屑 ========== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  padding: 16px 0;
}
.breadcrumb a { color: var(--text-muted); transition: color 0.3s; }
.breadcrumb a:hover { color: var(--primary-light); }
.breadcrumb .sep { color: rgba(255,255,255,0.2); }
.breadcrumb .current { color: var(--primary-light); }

/* ========== 视频播放页 ========== */
.video-player-wrap {
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 16/9;
  position: relative;
}
.video-player-wrap video, .video-player-wrap iframe {
  width: 100%;
  height: 100%;
  border: none;
}
.video-detail-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 28px;
  align-items: start;
}
.video-detail-title {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  margin: 20px 0 12px;
  line-height: 1.4;
}
.video-detail-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.video-detail-desc {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
  padding: 16px;
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.06);
}
.sidebar-title {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.sidebar-video-list { display: flex; flex-direction: column; gap: 12px; }
.sidebar-video-item {
  display: flex;
  gap: 12px;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: background 0.3s;
}
.sidebar-video-item:hover { background: rgba(255,255,255,0.05); }
.sidebar-thumb {
  width: 120px;
  height: 68px;
  border-radius: 6px;
  object-fit: cover;
  flex-shrink: 0;
}
.sidebar-info { flex: 1; }
.sidebar-video-title {
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  line-height: 1.4;
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.sidebar-video-meta { font-size: 12px; color: var(--text-muted); }

/* ========== 社区页 ========== */
.community-hero {
  background: linear-gradient(135deg, #1a0a2e 0%, #2d1b4e 50%, #1a0a2e 100%);
  padding: 60px 0;
  text-align: center;
}
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.post-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.3s;
}
.post-card:hover {
  border-color: var(--border);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.post-img {
  aspect-ratio: 4/3;
  overflow: hidden;
}
.post-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.post-card:hover .post-img img { transform: scale(1.05); }
.post-body { padding: 16px; }
.post-title {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.4;
}
.post-excerpt { font-size: 13px; color: var(--text-muted); line-height: 1.6; margin-bottom: 12px; }
.post-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
}

/* ========== 分页 ========== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
}
.page-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid rgba(255,255,255,0.1);
  background: var(--card-bg);
  color: var(--text-muted);
  transition: all 0.3s;
}
.page-btn:hover, .page-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* ========== 加载动画 ========== */
.loading-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--gradient-main);
  z-index: 9999;
  transition: width 0.3s;
}

/* ========== 回到顶部 ========== */
.back-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s;
  z-index: 500;
  box-shadow: 0 4px 16px rgba(232,51,109,0.4);
}
.back-top.visible { opacity: 1; transform: translateY(0); }
.back-top:hover { background: var(--primary-dark); }
.back-top svg { width: 18px; height: 18px; fill: #fff; }

/* ========== 标签云 ========== */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  padding: 5px 14px;
  border-radius: 16px;
  font-size: 13px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.3s;
}
.tag:hover {
  background: rgba(232,51,109,0.15);
  border-color: var(--primary);
  color: var(--primary-light);
}

/* ========== 通知弹窗 ========== */
.toast {
  position: fixed;
  bottom: 80px;
  right: 30px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 20px;
  font-size: 14px;
  color: #fff;
  z-index: 9999;
  transform: translateX(120%);
  transition: transform 0.4s;
  max-width: 300px;
  box-shadow: var(--shadow);
}
.toast.show { transform: translateX(0); }

/* ========== 响应式 ========== */
@media (max-width: 1200px) {
  .video-grid-4 { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 992px) {
  .main-nav { display: none; }
  .hamburger { display: flex; }
  .search-wrap { min-width: 160px; }
  .hero-content { margin-left: 5%; }
  .video-detail-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .video-grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .section { padding: 40px 0; }
  .hero { min-height: 420px; }
  .hero-content { margin-left: 0; }
  .hero-stats { gap: 24px; }
  .stat-num { font-size: 22px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .video-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .section-header { flex-direction: column; align-items: flex-start; }
  .qr-row { flex-direction: column; align-items: center; }
  .banner-slider { aspect-ratio: 16/7; }
}
@media (max-width: 480px) {
  .header-inner { gap: 12px; }
  .logo-text { font-size: 16px; }
  .search-wrap { min-width: 120px; }
  .video-grid-4 { grid-template-columns: 1fr; }
  .hero h1 { font-size: 26px; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
}

/* ========== 移动端菜单 ========== */
.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: rgba(13,10,20,0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 16px 20px;
  z-index: 999;
  flex-direction: column;
  gap: 4px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  transition: all 0.3s;
}
.mobile-menu a:hover { color: #fff; background: rgba(232,51,109,0.15); }

/* ========== 特色功能区 ========== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--card-bg);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: all 0.3s;
  cursor: pointer;
}
.feature-card:hover {
  border-color: var(--border);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  background: rgba(232,51,109,0.06);
}
.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: rgba(232,51,109,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin: 0 auto 16px;
  transition: background 0.3s;
}
.feature-card:hover .feature-icon { background: rgba(232,51,109,0.25); }
.feature-title {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}
.feature-desc { font-size: 13px; color: var(--text-muted); line-height: 1.5; }

/* ========== 统计数字区 ========== */
.stats-section {
  background: var(--gradient-main);
  padding: 48px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}
.stats-item { }
.stats-num {
  font-size: 40px;
  font-weight: 900;
  color: #fff;
  display: block;
  line-height: 1;
  margin-bottom: 8px;
}
.stats-label { font-size: 14px; color: rgba(255,255,255,0.8); }
@media (max-width: 768px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-num { font-size: 30px; }
}

/* ========== 直播区 ========== */
.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: #E8336D;
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}
.live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #fff;
  animation: pulse 1.5s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ========== 渐入动画 ========== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s, transform 0.6s;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ========== 关于页统计 ========== */
.stat-number {
  font-size: 40px;
  font-weight: 900;
  color: #fff;
  line-height: 1;
  margin-bottom: 8px;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-item {
  text-align: center;
  padding: 24px 16px;
}
.stat-label {
  font-size: 14px;
  color: var(--text-muted);
}

/* ===================================================
   四虎 - 补充样式 (EEAT/SEO优化版)
   =================================================== */

/* 视频更新标签 */
.video-updated {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  color: #4CAF50;
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
}

/* 统计区 */
.stats-section { background: var(--dark2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 28px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.stats-item { text-align: center; padding: 16px; }
.stats-num { display: block; font-size: clamp(22px,3vw,36px); font-weight: 900; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: 4px; }
.stats-label { font-size: 13px; color: var(--text-muted); }

/* 影视传媒专区 */
.media-zone-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.media-zone-card { position: relative; border-radius: var(--radius); overflow: hidden; aspect-ratio: 16/9; cursor: pointer; transition: transform 0.3s, box-shadow 0.3s; }
.media-zone-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.media-zone-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.media-zone-card:hover img { transform: scale(1.05); }
.media-zone-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.2) 60%, transparent 100%); display: flex; flex-direction: column; justify-content: flex-end; padding: 20px; }
.media-zone-overlay h3 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 4px; }
.media-zone-overlay p { font-size: 12px; color: rgba(255,255,255,0.7); margin-bottom: 8px; }
.media-zone-count { display: inline-block; background: var(--gradient-main); color: #fff; font-size: 11px; padding: 2px 8px; border-radius: 10px; }

/* 功能卡片 */
.feature-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.feature-card { background: var(--card-bg); border: 1px solid rgba(255,255,255,0.06); border-radius: var(--radius); padding: 28px 24px; cursor: pointer; transition: all 0.3s; }
.feature-card:hover { border-color: var(--border); transform: translateY(-4px); box-shadow: var(--shadow); }
.feature-icon { font-size: 36px; margin-bottom: 16px; }
.feature-title { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 10px; }
.feature-desc { font-size: 13px; color: var(--text-muted); line-height: 1.7; }

/* 社区功能 */
.community-features-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.community-feature-item { display: flex; align-items: flex-start; gap: 12px; background: var(--card-bg); border: 1px solid rgba(255,255,255,0.06); border-radius: var(--radius); padding: 20px; cursor: pointer; transition: all 0.3s; text-decoration: none; }
.community-feature-item:hover { border-color: var(--border); transform: translateY(-2px); }
.feature-icon-sm { font-size: 24px; flex-shrink: 0; margin-top: 2px; }

/* 专家团队 */
.expert-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: 20px; }
.expert-card { background: var(--card-bg); border: 1px solid rgba(255,255,255,0.06); border-radius: var(--radius); padding: 24px 16px; text-align: center; transition: all 0.3s; }
.expert-card:hover { border-color: var(--border); transform: translateY(-4px); box-shadow: var(--shadow); }
.expert-avatar-img { width: 80px; height: 80px; border-radius: 50%; margin: 0 auto 12px; border: 3px solid var(--primary); overflow: hidden; }
.expert-name { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 4px; }
.expert-role { font-size: 12px; color: var(--primary-light); margin-bottom: 10px; font-weight: 600; }
.expert-desc { font-size: 12px; color: var(--text-muted); line-height: 1.6; margin-bottom: 12px; }
.expert-actions { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.btn-sm { padding: 6px 12px; border-radius: 16px; font-size: 12px; font-weight: 600; cursor: pointer; transition: all 0.3s; border: none; }
.btn-sm-primary { background: var(--gradient-main); color: #fff; }
.btn-sm-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(232,51,109,0.4); }
.btn-sm-outline { border: 1px solid rgba(232,51,109,0.4) !important; color: var(--primary-light); background: transparent; }
.btn-sm-outline:hover { background: rgba(232,51,109,0.1); }

/* 合作伙伴 */
.partner-row { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.partner-item { background: var(--card-bg); border: 1px solid rgba(255,255,255,0.06); border-radius: 8px; padding: 12px 20px; font-size: 14px; font-weight: 600; color: var(--text-muted); transition: all 0.3s; }
.partner-item:hover { border-color: var(--border); color: var(--primary-light); }

/* FAQ */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item { background: var(--card-bg); border: 1px solid rgba(255,255,255,0.06); border-radius: var(--radius); margin-bottom: 12px; overflow: hidden; transition: all 0.3s; }
.faq-item.open { border-color: var(--border); }
.faq-q { display: flex; justify-content: space-between; align-items: center; padding: 18px 20px; cursor: pointer; font-size: 15px; font-weight: 600; color: #fff; gap: 12px; }
.faq-q:hover { color: var(--primary-light); }
.faq-icon { width: 24px; height: 24px; border-radius: 50%; background: rgba(232,51,109,0.15); display: flex; align-items: center; justify-content: center; font-size: 16px; color: var(--primary); flex-shrink: 0; transition: all 0.3s; }
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--gradient-main); color: #fff; }
.faq-a { display: none; padding: 0 20px 18px; font-size: 14px; color: var(--text-muted); line-height: 1.8; }
.faq-item.open .faq-a { display: block; }

/* 用户评价 */
.review-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.review-card { background: var(--card-bg); border: 1px solid rgba(255,255,255,0.06); border-radius: var(--radius); padding: 20px; transition: all 0.3s; }
.review-card:hover { border-color: var(--border); transform: translateY(-2px); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.review-avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--gradient-main); display: flex; align-items: center; justify-content: center; font-size: 16px; font-weight: 700; color: #fff; flex-shrink: 0; }
.review-name { font-size: 14px; font-weight: 600; color: #fff; }
.review-date { font-size: 12px; color: var(--text-muted); }
.review-stars { color: #f59e0b; font-size: 16px; margin-bottom: 10px; letter-spacing: 2px; }
.review-text { font-size: 13px; color: var(--text-muted); line-height: 1.7; margin-bottom: 10px; }
.review-tag { display: inline-block; background: rgba(232,51,109,0.1); border: 1px solid rgba(232,51,109,0.2); color: var(--primary-light); font-size: 11px; padding: 2px 8px; border-radius: 10px; }

/* 联系我们 */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info-list { display: flex; flex-direction: column; gap: 12px; }
.contact-item { display: flex; align-items: flex-start; gap: 12px; background: var(--card-bg); border: 1px solid rgba(255,255,255,0.06); border-radius: 8px; padding: 14px 16px; }
.contact-icon { font-size: 20px; flex-shrink: 0; margin-top: 2px; }
.contact-label { font-size: 12px; color: var(--text-muted); margin-bottom: 2px; }
.contact-value { font-size: 14px; font-weight: 600; color: #fff; }
.qr-row { display: flex; gap: 20px; justify-content: center; }
.qr-item { text-align: center; }
.qr-item img { width: 120px; height: 120px; border-radius: 12px; object-fit: cover; border: 2px solid rgba(255,255,255,0.1); }
.qr-label { font-size: 12px; color: var(--text-muted); margin-top: 8px; }

/* 分享按钮 */
.share-bar, .share-bar-footer { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; padding: 16px 0; }
.share-bar-footer { border-top: 1px solid rgba(255,255,255,0.06); margin-top: 32px; justify-content: center; }
.share-label { font-size: 13px; color: var(--text-muted); }
.share-btn { padding: 7px 16px; border-radius: 20px; font-size: 13px; font-weight: 600; cursor: pointer; transition: all 0.3s; border: none; }
.share-wechat { background: #07c160; color: #fff; }
.share-weibo { background: #e6162d; color: #fff; }
.share-douyin { background: #000; color: #fff; border: 1px solid #333 !important; }
.share-bilibili { background: #00a1d6; color: #fff; }
.share-btn:hover { transform: translateY(-1px); opacity: 0.9; }

/* 标签云 */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { display: inline-block; padding: 6px 14px; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08); border-radius: 20px; font-size: 13px; color: var(--text-muted); transition: all 0.3s; }
.tag:hover { border-color: var(--primary); color: var(--primary-light); background: rgba(232,51,109,0.08); }

/* 排序按钮 */
.sort-btn { padding: 6px 14px; border-radius: 16px; font-size: 13px; color: var(--text-muted); background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08); cursor: pointer; transition: all 0.3s; }
.sort-btn.active, .sort-btn:hover { background: var(--gradient-main); color: #fff; border-color: transparent; }

/* 分页 */
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 40px; flex-wrap: wrap; }
.page-btn { display: inline-flex; align-items: center; justify-content: center; min-width: 36px; height: 36px; padding: 0 10px; border-radius: 8px; font-size: 14px; color: var(--text-muted); background: var(--card-bg); border: 1px solid rgba(255,255,255,0.06); cursor: pointer; transition: all 0.3s; text-decoration: none; }
.page-btn:hover, .page-btn.active { background: var(--gradient-main); color: #fff; border-color: transparent; }

/* 内页英雄区 */
.inner-hero { padding: 60px 0; text-align: center; }
.inner-hero h1 { font-size: clamp(24px,4vw,42px); font-weight: 900; color: #fff; margin-bottom: 12px; }
.inner-hero h1 span { color: var(--primary-light); }
.inner-hero p { font-size: 15px; color: rgba(255,255,255,0.7); max-width: 640px; margin: 0 auto 20px; }
.inner-hero-stats { display: flex; justify-content: center; gap: 24px; flex-wrap: wrap; }
.inner-hero-stats span { font-size: 13px; color: var(--primary-light); background: rgba(232,51,109,0.1); padding: 6px 14px; border-radius: 20px; }

/* 面包屑导航 */
.breadcrumb-nav { background: rgba(255,255,255,0.02); border-bottom: 1px solid rgba(255,255,255,0.05); padding: 10px 0; }
.breadcrumb { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-muted); flex-wrap: wrap; }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary-light); }
.breadcrumb .sep { color: var(--text-muted); opacity: 0.5; }

/* 视频详情布局 */
.video-detail-layout { display: grid; grid-template-columns: 1fr 320px; gap: 32px; }
.video-player-wrap { background: #000; border-radius: 12px; overflow: hidden; aspect-ratio: 16/9; }
.video-player-wrap video { width: 100%; height: 100%; object-fit: contain; }

/* 关于页统计 */
.stat-number { font-size: clamp(28px,4vw,48px); font-weight: 900; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; display: block; }
.stats-about-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.stats-about-item { text-align: center; padding: 24px; background: var(--card-bg); border: 1px solid rgba(255,255,255,0.06); border-radius: var(--radius); }

/* 回到顶部 */
.back-top { position: fixed; bottom: 80px; right: 24px; width: 44px; height: 44px; border-radius: 50%; background: var(--gradient-main); display: flex; align-items: center; justify-content: center; cursor: pointer; opacity: 0; pointer-events: none; transition: all 0.3s; z-index: 999; box-shadow: 0 4px 16px rgba(232,51,109,0.4); }
.back-top.visible { opacity: 1; pointer-events: auto; }
.back-top svg { width: 20px; height: 20px; fill: #fff; }
.back-top:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,51,109,0.5); }

/* Toast通知 */
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px); background: rgba(26,18,48,0.95); backdrop-filter: blur(20px); border: 1px solid rgba(232,51,109,0.3); color: #fff; padding: 12px 24px; border-radius: 24px; font-size: 14px; z-index: 9999; opacity: 0; pointer-events: none; transition: all 0.3s ease; white-space: nowrap; max-width: 90vw; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* 淡入动画 */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* 移动端补充 */
.mobile-menu { display: none; flex-direction: column; background: var(--dark2); border-bottom: 1px solid var(--border); padding: 12px 20px; }
.mobile-menu.open { display: flex; }
.mobile-menu a { padding: 12px 0; font-size: 15px; color: var(--text-muted); border-bottom: 1px solid rgba(255,255,255,0.05); }
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a.active, .mobile-menu a:hover { color: var(--primary-light); }

/* 响应式补充 */
@media (max-width:1200px) {
  .expert-grid { grid-template-columns: repeat(3,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .media-zone-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width:1024px) {
  .video-grid-4 { grid-template-columns: repeat(3,1fr); }
  .feature-grid { grid-template-columns: repeat(2,1fr); }
  .community-features-grid { grid-template-columns: repeat(2,1fr); }
  .stats-grid { grid-template-columns: repeat(2,1fr); }
  .review-grid { grid-template-columns: repeat(2,1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .video-detail-layout { grid-template-columns: 1fr; }
}
@media (max-width:768px) {
  .main-nav, .header-actions, .search-wrap { display: none; }
  .hamburger { display: flex; }
  .video-grid-4 { grid-template-columns: repeat(2,1fr); }
  .expert-grid { grid-template-columns: repeat(2,1fr); }
  .media-zone-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .stats-about-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width:480px) {
  .video-grid-4 { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .community-features-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2,1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}