/* ========================================
   探花 TanHua - 主样式文件
   cvlbz8.cn | 影视传媒 · 视频社区
   ======================================== */

/* --- CSS变量 --- */
:root {
  --primary: #e84393;
  --primary-dark: #c0306e;
  --primary-light: #ff6bb5;
  --secondary: #ff7043;
  --accent: #9c27b0;
  --accent-light: #ce93d8;
  --bg-dark: #0d0d1a;
  --bg-card: #161628;
  --bg-card2: #1e1e35;
  --text-primary: #ffffff;
  --text-secondary: #b0b0cc;
  --text-muted: #7070a0;
  --border: rgba(232,67,147,0.2);
  --gradient-main: linear-gradient(135deg, #e84393 0%, #ff7043 50%, #9c27b0 100%);
  --gradient-card: linear-gradient(145deg, #161628, #1e1e35);
  --shadow-glow: 0 0 30px rgba(232,67,147,0.3);
  --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* --- 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-color: var(--bg-dark);
  color: var(--text-primary);
  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; }

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

/* ========================================
   顶部公告栏
   ======================================== */
.top-bar {
  background: var(--gradient-main);
  padding: 8px 0;
  text-align: center;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
}
.top-bar a { color: #fff; }
.top-bar a:hover { text-decoration: underline; }

/* ========================================
   导航栏
   ======================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13,13,26,0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.site-logo img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  object-fit: cover;
}
.logo-text {
  font-size: 22px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 1px;
}
.logo-sub {
  font-size: 11px;
  color: var(--text-muted);
  display: block;
  margin-top: -4px;
}
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  position: relative;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--primary-light);
  background: rgba(232,67,147,0.1);
}
.main-nav a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--gradient-main);
  border-radius: 1px;
}
.header-actions { display: flex; align-items: center; gap: 10px; }
.btn-live {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--gradient-main);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  box-shadow: 0 4px 15px rgba(232,67,147,0.4);
}
.btn-live::before {
  content: '';
  width: 8px;
  height: 8px;
  background: #fff;
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.hamburger span { width: 22px; height: 2px; background: var(--text-primary); border-radius: 1px; transition: var(--transition); }

/* ========================================
   搜索框
   ======================================== */
.search-bar-wrap {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.search-bar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-form {
  flex: 1;
  max-width: 600px;
  display: flex;
  align-items: center;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 0 16px;
  gap: 10px;
  transition: var(--transition);
}
.search-form:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(232,67,147,0.15);
}
.search-form svg { color: var(--text-muted); flex-shrink: 0; }
.search-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 14px;
  padding: 10px 0;
  font-family: inherit;
}
.search-input::placeholder { color: var(--text-muted); }
.search-btn {
  padding: 8px 20px;
  background: var(--gradient-main);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
}
.search-tags { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.search-tag {
  padding: 4px 12px;
  background: rgba(232,67,147,0.1);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}
.search-tag:hover { background: rgba(232,67,147,0.2); color: var(--primary-light); }

/* ========================================
   面包屑
   ======================================== */
.breadcrumb {
  max-width: 1280px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary-light); }
.breadcrumb span { color: var(--text-secondary); }

/* ========================================
   通用容器
   ======================================== */
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }
.section { padding: 60px 0; }
.section-sm { padding: 40px 0; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(232,67,147,0.15);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 12px;
  color: var(--primary-light);
  margin-bottom: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.section-title {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 12px;
}
.section-title .highlight {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-desc { color: var(--text-secondary); font-size: 15px; max-width: 600px; margin: 0 auto; }

/* ========================================
   按钮
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 24px;
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: var(--gradient-main);
  color: #fff;
  box-shadow: 0 4px 20px rgba(232,67,147,0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(232,67,147,0.5); }
.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary-light);
}
.btn-outline:hover { background: rgba(232,67,147,0.1); }
.btn-ghost { background: rgba(255,255,255,0.08); color: var(--text-secondary); }
.btn-ghost:hover { background: rgba(255,255,255,0.15); color: #fff; }
.btn-sm { padding: 8px 18px; font-size: 13px; }

/* ========================================
   Hero 区域
   ======================================== */
.hero {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero_video_bg.jpg');
  background-size: cover;
  background-position: center;
  filter: brightness(0.35);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,13,26,0.8) 0%, rgba(232,67,147,0.15) 50%, rgba(13,13,26,0.9) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 20px;
  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(232,67,147,0.2);
  border: 1px solid rgba(232,67,147,0.4);
  border-radius: 20px;
  font-size: 13px;
  color: var(--primary-light);
  margin-bottom: 20px;
}
.hero-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
}
.hero-title .brand { background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-desc { font-size: 16px; color: var(--text-secondary); margin-bottom: 32px; line-height: 1.8; }
.hero-stats { display: flex; gap: 32px; margin-bottom: 36px; }
.stat-item { text-align: center; }
.stat-num { font-size: 28px; font-weight: 800; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-label { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-visual { position: relative; }
.hero-video-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-glow);
}
.hero-video-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.hero-video-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);
  border-radius: var(--radius-lg);
}
.hero-video-card:hover .hero-video-overlay { opacity: 1; }
.play-btn-lg {
  width: 64px;
  height: 64px;
  background: rgba(232,67,147,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 30px rgba(232,67,147,0.6);
}
.hero-floating {
  position: absolute;
  bottom: -20px;
  left: -20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-card);
}
.floating-avatar { width: 36px; height: 36px; border-radius: 50%; object-fit: cover; }
.floating-text { font-size: 12px; }
.floating-text strong { display: block; color: var(--text-primary); }
.floating-text span { color: var(--text-muted); }

/* ========================================
   视频卡片
   ======================================== */
.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.video-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-glow); border-color: var(--primary); }
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.video-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.video-card:hover .video-thumb img { transform: scale(1.05); }
.video-play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}
.video-card:hover .video-play-overlay { opacity: 1; }
.play-icon {
  width: 52px;
  height: 52px;
  background: rgba(232,67,147,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: var(--transition);
}
.video-card:hover .play-icon { transform: scale(1); }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.8);
  color: #fff;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
}
.video-quality {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
}
.video-info { padding: 14px; }
.video-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta { display: flex; align-items: center; justify-content: space-between; }
.video-author { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-muted); }
.video-author img { width: 20px; height: 20px; border-radius: 50%; object-fit: cover; }
.video-stats { display: flex; gap: 12px; font-size: 12px; color: var(--text-muted); }
.video-stats span { display: flex; align-items: center; gap: 3px; }

/* ========================================
   分类标签栏
   ======================================== */
.category-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.cat-tab {
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}
.cat-tab:hover, .cat-tab.active {
  background: var(--gradient-main);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 15px rgba(232,67,147,0.3);
}

/* ========================================
   专家卡片
   ======================================== */
.expert-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 24px; }
.expert-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
}
.expert-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-glow); }
.expert-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px;
  border: 3px solid var(--primary);
  box-shadow: 0 0 20px rgba(232,67,147,0.4);
}
.expert-name { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.expert-title { font-size: 13px; color: var(--primary-light); margin-bottom: 12px; }
.expert-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 16px; }
.expert-awards { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin-bottom: 16px; }
.award-badge {
  padding: 3px 10px;
  background: rgba(156,39,176,0.2);
  border: 1px solid rgba(156,39,176,0.4);
  border-radius: 10px;
  font-size: 11px;
  color: var(--accent-light);
}
.expert-actions { display: flex; gap: 8px; justify-content: center; }

/* ========================================
   评价区
   ======================================== */
.reviews-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: var(--transition);
}
.review-card:hover { border-color: var(--primary); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
}
.review-user strong { display: block; font-size: 14px; }
.review-user span { font-size: 12px; color: var(--text-muted); }
.review-stars { margin-left: auto; color: #ffd700; font-size: 14px; }
.review-text { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
.review-tag {
  display: inline-block;
  margin-top: 10px;
  padding: 3px 10px;
  background: rgba(232,67,147,0.1);
  border-radius: 10px;
  font-size: 11px;
  color: var(--primary-light);
}

/* ========================================
   FAQ
   ======================================== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open { border-color: var(--primary); }
.faq-question {
  width: 100%;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  text-align: left;
}
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(232,67,147,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
  color: var(--primary-light);
  font-size: 16px;
  font-weight: 700;
}
.faq-item.open .faq-icon { background: var(--primary); color: #fff; transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 20px;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 20px 18px; }
.faq-answer p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; }

/* ========================================
   合作品牌Logo墙
   ======================================== */
.partner-wall {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}
.partner-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 28px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-muted);
  transition: var(--transition);
  text-align: center;
  min-width: 120px;
}
.partner-item:hover { border-color: var(--primary); color: var(--primary-light); background: rgba(232,67,147,0.05); }

/* ========================================
   联系我们
   ======================================== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.contact-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 20px; }
.contact-item { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 16px; }
.contact-icon {
  width: 36px;
  height: 36px;
  background: rgba(232,67,147,0.15);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 16px;
}
.contact-info strong { display: block; font-size: 13px; color: var(--text-muted); margin-bottom: 2px; }
.contact-info span { font-size: 15px; color: var(--text-primary); }
.qr-row { display: flex; gap: 20px; margin-top: 20px; }
.qr-box { text-align: center; }
.qr-box img { width: 100px; height: 100px; border-radius: 8px; border: 2px solid var(--border); }
.qr-box p { font-size: 12px; color: var(--text-muted); margin-top: 6px; }

/* ========================================
   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: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition);
}
.share-wechat { background: rgba(7,193,96,0.15); color: #07c160; border: 1px solid rgba(7,193,96,0.3); }
.share-weibo { background: rgba(230,22,45,0.15); color: #e6162d; border: 1px solid rgba(230,22,45,0.3); }
.share-douyin { background: rgba(0,0,0,0.3); color: #fff; border: 1px solid rgba(255,255,255,0.2); }
.share-bilibili { background: rgba(0,161,214,0.15); color: #00a1d6; border: 1px solid rgba(0,161,214,0.3); }
.share-btn:hover { transform: translateY(-2px); filter: brightness(1.2); }

/* ========================================
   AI赋能区
   ======================================== */
.ai-features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.ai-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.ai-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-main);
}
.ai-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-glow); }
.ai-icon {
  font-size: 36px;
  margin-bottom: 16px;
  display: block;
}
.ai-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.ai-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
.ai-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 14px; }
.ai-tag {
  padding: 3px 10px;
  background: rgba(232,67,147,0.1);
  border-radius: 10px;
  font-size: 11px;
  color: var(--primary-light);
}

/* ========================================
   社区功能区
   ======================================== */
.community-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.community-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
}
.community-card:hover { border-color: var(--primary); background: rgba(232,67,147,0.05); transform: translateY(-3px); }
.community-icon { font-size: 32px; margin-bottom: 12px; display: block; }
.community-card h4 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.community-card p { font-size: 12px; color: var(--text-muted); line-height: 1.5; }
.community-count { font-size: 11px; color: var(--primary-light); margin-top: 8px; }

/* ========================================
   图片展示墙
   ======================================== */
.photo-wall { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.photo-item {
  position: relative;
  aspect-ratio: 3/4;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
}
.photo-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.photo-item:hover img { transform: scale(1.08); }
.photo-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 50%);
  opacity: 0;
  transition: var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 12px;
}
.photo-item:hover .photo-overlay { opacity: 1; }
.photo-overlay span { font-size: 12px; color: #fff; }

/* ========================================
   页脚
   ======================================== */
.site-footer {
  background: var(--bg-card);
  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: 24px; }
.footer-desc { font-size: 14px; color: var(--text-muted); margin: 12px 0 20px; line-height: 1.7; }
.footer-social { display: flex; gap: 10px; }
.social-icon {
  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);
}
.social-icon:hover { background: var(--primary); }
.footer-col h4 { font-size: 15px; font-weight: 700; margin-bottom: 16px; color: var(--text-primary); }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 14px; color: var(--text-muted); transition: var(--transition); }
.footer-links a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copyright { font-size: 13px; color: var(--text-muted); }
.footer-copyright a { color: var(--primary-light); }
.footer-update { font-size: 12px; color: var(--text-muted); }
.footer-links-bottom { display: flex; gap: 16px; }
.footer-links-bottom a { font-size: 13px; color: var(--text-muted); }
.footer-links-bottom a:hover { color: var(--primary-light); }

/* ========================================
   内页通用
   ======================================== */
.page-hero {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 48px 0;
  text-align: center;
}
.page-hero h1 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; margin-bottom: 12px; }
.page-hero p { font-size: 16px; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }
.page-content { padding: 48px 0; }

/* ========================================
   加载更多
   ======================================== */
.load-more-wrap { text-align: center; margin-top: 40px; }

/* ========================================
   弹幕效果
   ======================================== */
.danmaku-bar {
  background: rgba(0,0,0,0.5);
  padding: 10px 0;
  overflow: hidden;
  position: relative;
}
.danmaku-inner {
  display: flex;
  gap: 60px;
  animation: danmaku-scroll 30s linear infinite;
  white-space: nowrap;
}
.danmaku-inner span { font-size: 13px; color: rgba(255,255,255,0.7); }
@keyframes danmaku-scroll {
  0% { transform: translateX(100vw); }
  100% { transform: translateX(-100%); }
}

/* ========================================
   直播预告
   ======================================== */
.live-banner {
  background: linear-gradient(135deg, #1a0a2e, #2d0a3e);
  border: 1px solid rgba(156,39,176,0.4);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 40px;
}
.live-info { display: flex; align-items: center; gap: 16px; }
.live-dot {
  width: 12px;
  height: 12px;
  background: #ff4444;
  border-radius: 50%;
  animation: pulse 1s infinite;
  flex-shrink: 0;
}
.live-text strong { display: block; font-size: 18px; font-weight: 700; }
.live-text span { font-size: 13px; color: var(--text-muted); }
.live-viewers { font-size: 13px; color: var(--accent-light); }

/* ========================================
   响应式
   ======================================== */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .ai-features { grid-template-columns: 1fr 1fr; }
  .community-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .main-nav { display: none; }
  .hamburger { display: flex; }
  .header-actions .btn-live span { display: none; }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .photo-wall { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .ai-features { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; }
  .search-tags { display: none; }
}
@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .reviews-grid { grid-template-columns: 1fr; }
}

/* ========================================
   移动端导航菜单
   ======================================== */
.mobile-nav {
  display: none;
  position: fixed;
  top: 68px;
  left: 0;
  right: 0;
  background: rgba(13,13,26,0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 999;
  padding: 16px 20px;
}
.mobile-nav.open { display: block; }
.mobile-nav a {
  display: block;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 15px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav a:hover { color: var(--primary-light); background: rgba(232,67,147,0.08); }

/* ========================================
   辅助类
   ======================================== */
.text-gradient { background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.hidden { display: none; }
.show { display: block; }

/* 内页文章内容 */
.article-body { max-width: 860px; margin: 0 auto; }
.article-body h2 { font-size: 22px; font-weight: 700; margin: 32px 0 16px; color: var(--text-primary); }
.article-body h3 { font-size: 18px; font-weight: 600; margin: 24px 0 12px; color: var(--primary-light); }
.article-body p { font-size: 15px; color: var(--text-secondary); line-height: 1.9; margin-bottom: 16px; }
.article-body ul { padding-left: 20px; margin-bottom: 16px; }
.article-body ul li { font-size: 15px; color: var(--text-secondary); line-height: 1.8; list-style: disc; }