/* ============================================
   四虎视频 - 主样式表
   Brand: 四虎视频 | Domain: codlan.cn
   Version: 1.0
   ============================================ */

/* CSS变量 - 品牌色彩系统 */
:root {
  --primary: #e8306a;
  --primary-light: #ff6b9d;
  --primary-dark: #c0174f;
  --secondary: #ff9ec4;
  --accent: #ff4d8d;
  --bg-dark: #1a0a12;
  --bg-card: #2a1020;
  --bg-section: #f9f0f4;
  --text-main: #1a0a12;
  --text-muted: #7a5a65;
  --text-white: #ffffff;
  --border-color: #f0d0dc;
  --gradient-main: linear-gradient(135deg, #e8306a 0%, #ff6b9d 50%, #ffb3cc 100%);
  --gradient-dark: linear-gradient(135deg, #1a0a12 0%, #2d0f1e 100%);
  --shadow-sm: 0 2px 8px rgba(232,48,106,0.12);
  --shadow-md: 0 4px 20px rgba(232,48,106,0.18);
  --shadow-lg: 0 8px 40px rgba(232,48,106,0.25);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 重置与基础 */
*, *::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', 'Helvetica Neue', Arial, sans-serif;
  color: var(--text-main);
  background: #fff;
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

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

/* ============ 导航栏 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 20px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.site-logo img { height: 42px; width: auto; }
.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; justify-content: center; }
.main-nav a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-main);
  white-space: nowrap;
  position: relative;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--primary);
  background: rgba(232,48,106,0.07);
}
.main-nav a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.btn-login {
  padding: 8px 20px;
  border-radius: var(--radius-xl);
  background: var(--gradient-main);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.btn-login:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text-main); border-radius: 2px; transition: var(--transition); }

/* ============ 搜索栏 ============ */
.search-bar-wrap {
  background: var(--bg-section);
  border-bottom: 1px solid var(--border-color);
  padding: 10px 0;
}
.search-bar-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: #fff;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  flex: 1;
  max-width: 600px;
  transition: var(--transition);
}
.search-form:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(232,48,106,0.1); }
.search-form input {
  flex: 1;
  padding: 10px 18px;
  border: none;
  outline: none;
  font-size: 14px;
  background: transparent;
  color: var(--text-main);
}
.search-form button {
  padding: 10px 20px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.search-form button:hover { opacity: 0.9; }
.search-hot-tags { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.search-hot-tags span { font-size: 12px; color: var(--text-muted); }
.hot-tag {
  padding: 4px 12px;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}
.hot-tag:hover { border-color: var(--primary); color: var(--primary); background: rgba(232,48,106,0.05); }

/* ============ 面包屑 ============ */
.breadcrumb {
  max-width: 1280px;
  margin: 0 auto;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
}
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: #ccc; }
.breadcrumb .current { color: var(--primary); }

/* ============ 通用区块 ============ */
.section { padding: 60px 0; }
.uaoijFD4 { background: var(--bg-dark); color: #fff; }
.gnHvvc { background: var(--bg-section); }
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-tag {
  display: inline-block;
  padding: 4px 16px;
  background: rgba(232,48,106,0.1);
  color: var(--primary);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.section-title {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 12px;
}
.section-title em { font-style: normal; color: var(--primary); }
.section-desc { font-size: 16px; color: var(--text-muted); max-width: 560px; margin: 0 auto; }

/* ============ Hero Banner ============ */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--gradient-dark);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/banner_main.jpg');
  background-size: cover;
  background-position: center top;
  opacity: 0.45;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(26,10,18,0.92) 0%, rgba(26,10,18,0.6) 55%, rgba(26,10,18,0.2) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 24px;
  width: 100%;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(232,48,106,0.2);
  border: 1px solid rgba(232,48,106,0.4);
  border-radius: 20px;
  color: var(--secondary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.hero-badge::before { content: '●'; color: var(--primary-light); font-size: 8px; animation: blink 1.5s infinite; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.3} }
.hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 900;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 16px;
}
.hero h1 span { color: var(--primary-light); }
.hero-sub {
  font-size: 18px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 32px;
  max-width: 500px;
}
.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: var(--radius-xl);
  font-size: 16px;
  font-weight: 700;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border: 2px solid rgba(255,255,255,0.5);
  color: #fff;
  border-radius: var(--radius-xl);
  font-size: 16px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); }
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.stat-item { text-align: left; }
.stat-num { font-size: 28px; font-weight: 900; color: var(--primary-light); }
.stat-label { font-size: 13px; color: rgba(255,255,255,0.6); margin-top: 2px; }

/* ============ 视频卡片 ============ */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.video-card {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #1a0a12;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.play-btn {
  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-btn { background: rgba(0,0,0,0.35); }
.play-icon {
  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(0.7);
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.play-icon::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent var(--primary);
  margin-left: 4px;
}
.video-card:hover .play-icon { opacity: 1; transform: scale(1); }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 10px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 12px;
  padding: 2px 7px;
  border-radius: 4px;
  font-weight: 600;
}
.video-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 4px;
  font-weight: 700;
}
.video-info { padding: 14px 16px 16px; }
.video-title {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  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-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;
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  flex-shrink: 0;
}
.video-stats { display: flex; gap: 10px; }
.video-stats span { display: flex; align-items: center; gap: 3px; }

/* ============ 分类标签栏 ============ */
.cat-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.cat-tab {
  padding: 8px 20px;
  border-radius: var(--radius-xl);
  border: 1.5px solid var(--border-color);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}
.cat-tab:hover, .cat-tab.active {
  background: var(--gradient-main);
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-sm);
}

/* ============ 专家卡片 ============ */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.expert-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.expert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--primary); }
.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 16px;
  overflow: hidden;
  border: 3px solid var(--primary);
  box-shadow: 0 0 0 4px rgba(232,48,106,0.15);
}
.expert-avatar img { width: 100%; height: 100%; object-fit: cover; }
.expert-name { font-size: 17px; font-weight: 800; margin-bottom: 4px; }
.expert-role { font-size: 13px; color: var(--primary); font-weight: 600; margin-bottom: 10px; }
.expert-desc { font-size: 13px; color: var(--text-muted); line-height: 1.6; margin-bottom: 14px; }
.expert-awards { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin-bottom: 16px; }
.award-tag {
  padding: 3px 10px;
  background: rgba(232,48,106,0.08);
  color: var(--primary);
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}
.expert-btns { display: flex; gap: 8px; justify-content: center; }
.btn-sm {
  padding: 7px 16px;
  border-radius: var(--radius-xl);
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-sm-primary { background: var(--gradient-main); color: #fff; }
.btn-sm-outline { border: 1.5px solid var(--primary); color: var(--primary); }
.btn-sm-outline:hover { background: var(--primary); color: #fff; }

/* ============ 合作品牌Logo墙 ============ */
.partner-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  align-items: center;
}
.partner-item {
  padding: 12px 24px;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-muted);
  transition: var(--transition);
  min-width: 120px;
  text-align: center;
}
.partner-item:hover { border-color: var(--primary); color: var(--primary); box-shadow: var(--shadow-sm); }

/* ============ FAQ ============ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open { border-color: var(--primary); box-shadow: var(--shadow-sm); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  background: #fff;
  transition: var(--transition);
}
.faq-question:hover { background: var(--bg-section); }
.faq-item.open .faq-question { background: rgba(232,48,106,0.05); color: var(--primary); }
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
  transition: var(--transition);
}
.faq-item.open .faq-icon { background: var(--primary); color: #fff; transform: rotate(45deg); }
.faq-answer {
  display: none;
  padding: 0 22px 18px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}
.faq-item.open .faq-answer { display: block; }

/* ============ 用户评论 ============ */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.review-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 22px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.review-card:hover { box-shadow: var(--shadow-md); border-color: var(--primary); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  font-weight: 800;
  flex-shrink: 0;
}
.reviewer-info { flex: 1; }
.reviewer-name { font-size: 15px; font-weight: 700; }
.reviewer-tag { font-size: 12px; color: var(--text-muted); }
.review-stars { color: #ffb800; font-size: 14px; letter-spacing: 2px; }
.review-text { font-size: 14px; color: var(--text-muted); line-height: 1.7; }
.review-date { font-size: 12px; color: #ccc; margin-top: 10px; }

/* ============ 联系区块 ============ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.contact-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.contact-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.contact-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
  font-size: 24px;
}
.contact-label { font-size: 13px; color: var(--text-muted); margin-bottom: 6px; }
.contact-value { font-size: 15px; font-weight: 700; color: var(--text-main); }

/* ============ 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); font-weight: 600; }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-xl);
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
  border: 1.5px solid transparent;
}
.share-wechat { background: #07c160; color: #fff; }
.share-weibo { background: #e6162d; color: #fff; }
.share-douyin { background: #010101; color: #fff; }
.share-bilibili { background: #00a1d6; color: #fff; }
.share-btn:hover { opacity: 0.85; transform: translateY(-1px); }

/* ============ 二维码区块 ============ */
.qr-section {
  display: flex;
  gap: 40px;
  justify-content: center;
  flex-wrap: wrap;
}
.qr-item { text-align: center; }
.qr-item img {
  width: 140px;
  height: 140px;
  border-radius: var(--radius-md);
  border: 2px solid var(--border-color);
  margin-bottom: 10px;
}
.qr-label { font-size: 13px; color: var(--text-muted); font-weight: 600; }

/* ============ 页脚 ============ */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.7);
  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; line-height: 1.8; margin-bottom: 20px; color: rgba(255,255,255,0.5); }
.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: rgba(255,255,255,0.55); transition: var(--transition); }
.footer-links a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: var(--primary-light); }
.update-time { color: rgba(255,255,255,0.35); font-size: 12px; }

/* ============ 功能模块 ============ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}
.feature-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--primary); }
.feature-icon {
  font-size: 36px;
  margin-bottom: 14px;
  display: block;
}
.feature-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.feature-desc { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* ============ How-To 步骤 ============ */
.steps-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
  counter-reset: step;
}
.step-item {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 28px 22px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: var(--transition);
}
.step-item:hover { box-shadow: var(--shadow-md); border-color: var(--primary); }
.step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-main);
  color: #fff;
  font-size: 18px;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}
.step-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.step-desc { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* ============ 直播区块 ============ */
.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  background: #e8306a;
  color: #fff;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
}
.live-badge::before { content: '●'; font-size: 8px; animation: blink 1s infinite; }

/* ============ 内页 Banner ============ */
.page-banner {
  background: var(--gradient-dark);
  padding: 60px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(232,48,106,0.2) 0%, transparent 70%);
}
.page-banner h1 { font-size: 36px; font-weight: 900; color: #fff; margin-bottom: 10px; position: relative; }
.page-banner p { font-size: 16px; color: rgba(255,255,255,0.65); position: relative; }

/* ============ 分页 ============ */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.page-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}
.page-btn:hover, .page-btn.active {
  background: var(--gradient-main);
  color: #fff;
  border-color: transparent;
}

/* ============ 滚动动画 ============ */
.DGtEuVNi { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.DGtEuVNi.visible { opacity: 1; transform: translateY(0); }

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .main-nav { display: none; }
  .hamburger { display: flex; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    z-index: 999;
  }
  .hero { min-height: 420px; }
  .hero h1 { font-size: 28px; }
  .hero-stats { gap: 24px; }
  .section { padding: 40px 0; }
  .section-title { font-size: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
  .search-hot-tags { display: none; }
}
@media (max-width: 480px) {
  .header-inner { padding: 0 16px; }
  .container { padding: 0 16px; }
  .hero-content { padding: 60px 16px; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
  .video-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
}

/* ============ 工具类 ============ */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.mt-8 { margin-top: 8px; }
.z57wO6Nd { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.N73hdtC { margin-top: 32px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.rricA { margin-bottom: 24px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.w-full { width: 100%; }
.oFIPw {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 28px;
  border: 1.5px solid var(--primary);
  color: var(--primary);
  border-radius: var(--radius-xl);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.oFIPw:hover { background: var(--primary); color: #fff; }