/* ================================================
   每日大赛影视传媒 - 主样式文件
   Brand: 每日大赛 | Domain: pl805865.cn
   ================================================ */

/* ---------- CSS变量 ---------- */
:root {
  --primary: #8B1A1A;
  --primary-dark: #6B1010;
  --primary-light: #B22222;
  --gold: #D4AF37;
  --gold-light: #F0D060;
  --dark: #1a1a1a;
  --dark2: #2d2d2d;
  --gray: #555;
  --gray-light: #888;
  --bg: #f8f5f0;
  --bg2: #fff;
  --border: #e8ddd0;
  --text: #333;
  --text-light: #666;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 20px rgba(139,26,26,0.12);
  --shadow-hover: 0 8px 32px rgba(139,26,26,0.22);
  --transition: all 0.3s ease;
  --font-main: 'PingFang SC', 'Microsoft YaHei', '微软雅黑', sans-serif;
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--gold); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; outline: none; font-family: var(--font-main); }
input, textarea { font-family: var(--font-main); outline: none; }

/* ---------- 通用布局 ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 70px 0; }
.section-alt { background: var(--bg2); }
.section-dark { background: var(--dark); color: #fff; }
.section-title {
  text-align: center;
  margin-bottom: 50px;
}
.section-title h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  position: relative;
  display: inline-block;
  padding-bottom: 14px;
}
.section-title h2::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 60px; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--gold));
  border-radius: 2px;
}
.section-title p {
  color: var(--text-light);
  margin-top: 12px;
  font-size: 1rem;
}
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  box-shadow: 0 4px 15px rgba(139,26,26,0.3);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(139,26,26,0.4);
}
.btn-gold {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: var(--dark);
  box-shadow: 0 4px 15px rgba(212,175,55,0.3);
}
.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(212,175,55,0.4);
  color: var(--dark);
}
.btn-outline {
  border: 2px solid var(--primary);
  color: var(--primary);
  background: transparent;
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
}
.tag {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(139,26,26,0.1);
  color: var(--primary);
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: 600;
}
.tag-gold {
  background: rgba(212,175,55,0.15);
  color: #a07c10;
}

/* ---------- 顶部公告栏 ---------- */
.top-bar {
  background: var(--primary);
  color: rgba(255,255,255,0.9);
  font-size: 0.82rem;
  padding: 6px 0;
  text-align: center;
}
.top-bar a { color: var(--gold-light); }

/* ---------- 导航栏 ---------- */
.site-header {
  background: var(--bg2);
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: 1200px;
  margin: 0 auto;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.site-logo img {
  height: 48px;
  width: auto;
}
.site-logo-text {
  display: flex;
  flex-direction: column;
}
.site-logo-text .brand-name {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
}
.site-logo-text .brand-sub {
  font-size: 0.7rem;
  color: var(--gold);
  letter-spacing: 1px;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.site-nav a {
  padding: 8px 14px;
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 500;
  transition: var(--transition);
}
.site-nav a:hover, .site-nav a.active {
  background: var(--primary);
  color: #fff;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---------- 搜索框 ---------- */
.search-bar-wrap {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 16px 0;
}
.search-bar-inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  gap: 0;
}
.search-bar-inner input {
  flex: 1;
  padding: 12px 20px;
  border: none;
  border-radius: 50px 0 0 50px;
  font-size: 0.95rem;
  background: rgba(255,255,255,0.95);
  color: var(--text);
}
.search-bar-inner input::placeholder { color: #aaa; }
.search-bar-inner button {
  padding: 12px 28px;
  background: var(--gold);
  color: var(--dark);
  border-radius: 0 50px 50px 0;
  font-size: 0.95rem;
  font-weight: 700;
  transition: var(--transition);
}
.search-bar-inner button:hover { background: var(--gold-light); }

/* ---------- Hero Banner ---------- */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 560px;
  display: flex;
  align-items: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.55);
  z-index: 0;
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 20px;
  color: #fff;
}
.hero-content h1 {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.5);
}
.hero-content h1 span { color: var(--gold-light); }
.hero-content p {
  font-size: 1.15rem;
  opacity: 0.92;
  max-width: 580px;
  margin-bottom: 32px;
  text-shadow: 0 1px 6px rgba(0,0,0,0.4);
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat .num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--gold-light);
  display: block;
}
.hero-stat .label {
  font-size: 0.82rem;
  opacity: 0.8;
}

/* ---------- 视频卡片 ---------- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.video-card {
  background: var(--bg2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
  background: var(--dark2);
  cursor: pointer;
}
.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); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: background 0.3s;
  opacity: 0;
}
.video-card:hover .video-play-btn {
  opacity: 1;
  background: rgba(0,0,0,0.35);
}
.video-play-btn .play-icon {
  width: 60px; height: 60px;
  background: rgba(255,255,255,0.92);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: transform 0.3s;
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.video-card:hover .play-icon { transform: scale(1); }
.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-duration {
  position: absolute;
  bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-badge {
  position: absolute;
  top: 8px; left: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 600;
}
.video-info { padding: 16px; }
.video-info h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-light);
}
.video-meta span { display: flex; align-items: center; gap: 3px; }
.video-meta .icon { font-size: 0.85rem; }

/* ---------- 专家卡片 ---------- */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 28px;
}
.expert-card {
  background: var(--bg2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-align: center;
}
.expert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.expert-avatar {
  position: relative;
  height: 220px;
  overflow: hidden;
}
.expert-avatar img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: top;
}
.expert-badge {
  position: absolute;
  bottom: 12px; left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
}
.expert-body { padding: 20px 16px; }
.expert-body h3 { font-size: 1.05rem; color: var(--primary); margin-bottom: 4px; }
.expert-body .title { font-size: 0.82rem; color: var(--gold); margin-bottom: 10px; }
.expert-body p { font-size: 0.82rem; color: var(--text-light); margin-bottom: 14px; line-height: 1.6; }
.expert-btns { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.expert-btns a {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1.5px solid var(--primary);
  color: var(--primary);
  transition: var(--transition);
}
.expert-btns a:hover { background: var(--primary); color: #fff; }

/* ---------- 评价卡片 ---------- */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.review-card {
  background: var(--bg2);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
  transition: var(--transition);
}
.review-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.review-stars { color: var(--gold); font-size: 1rem; margin-bottom: 12px; }
.review-text { font-size: 0.9rem; color: var(--text); line-height: 1.7; margin-bottom: 16px; }
.review-author { display: flex; align-items: center; gap: 12px; }
.review-author-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--gold));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1rem; font-weight: 700;
  flex-shrink: 0;
}
.review-author-info .name { font-size: 0.88rem; font-weight: 600; color: var(--text); }
.review-author-info .date { font-size: 0.75rem; color: var(--text-light); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg2);
  border-radius: var(--radius);
  margin-bottom: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  overflow: hidden;
}
.faq-question {
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  font-size: 0.95rem;
  transition: var(--transition);
}
.faq-question:hover { color: var(--primary); }
.faq-question .faq-icon {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  transition: transform 0.3s;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.8;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 18px;
}

/* ---------- 合作品牌墙 ---------- */
.partner-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  align-items: center;
}
.partner-item {
  background: var(--bg2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 28px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gray);
  transition: var(--transition);
  text-align: center;
  min-width: 120px;
}
.partner-item:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow);
}

/* ---------- 联系区块 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info h3 { font-size: 1.3rem; color: var(--primary); margin-bottom: 20px; }
.contact-item {
  display: flex;
  gap: 14px;
  margin-bottom: 18px;
  align-items: flex-start;
}
.contact-icon {
  width: 40px; height: 40px;
  background: rgba(139,26,26,0.1);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-detail .label { font-size: 0.78rem; color: var(--text-light); }
.contact-detail .value { font-size: 0.92rem; font-weight: 600; color: var(--text); }
.qr-group { display: flex; gap: 24px; flex-wrap: wrap; }
.qr-item { text-align: center; }
.qr-item img { width: 120px; height: 120px; border-radius: var(--radius); border: 2px solid var(--border); }
.qr-item p { font-size: 0.78rem; color: var(--text-light); margin-top: 6px; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--dark);
  color: rgba(255,255,255,0.75);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand .logo-wrap {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 16px;
}
.footer-brand .logo-wrap img { height: 44px; }
.footer-brand .brand-name { font-size: 1.3rem; font-weight: 800; color: #fff; }
.footer-brand p { font-size: 0.85rem; line-height: 1.8; margin-bottom: 20px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
  transition: var(--transition);
}
.footer-social a:hover { background: var(--primary); color: #fff; }
.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--gold); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
}
.footer-bottom a { color: rgba(255,255,255,0.55); }
.footer-bottom a:hover { color: var(--gold); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  background: var(--bg2);
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.breadcrumb-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  font-size: 0.82rem;
  color: var(--text-light);
}
.breadcrumb-inner a { color: var(--primary); }
.breadcrumb-inner span { margin: 0 6px; }

/* ---------- 内页Hero ---------- */
.page-hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 60px 0;
  text-align: center;
}
.page-hero h1 { font-size: 2.2rem; font-weight: 800; margin-bottom: 12px; }
.page-hero p { font-size: 1rem; opacity: 0.85; max-width: 600px; margin: 0 auto; }

/* ---------- 统计数字 ---------- */
.stats-row {
  display: flex;
  gap: 0;
  background: var(--bg2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.stat-item {
  flex: 1;
  text-align: center;
  padding: 28px 16px;
  border-right: 1px solid var(--border);
}
.stat-item:last-child { border-right: none; }
.stat-item .num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
  display: block;
}
.stat-item .label { font-size: 0.82rem; color: var(--text-light); margin-top: 4px; }

/* ---------- 分享按钮 ---------- */
.share-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 20px 0;
}
.share-bar .label { font-size: 0.88rem; color: var(--text-light); }
.share-btn {
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  border: 1.5px solid;
  transition: var(--transition);
  cursor: pointer;
}
.share-wechat { border-color: #07C160; color: #07C160; }
.share-wechat:hover { background: #07C160; color: #fff; }
.share-weibo { border-color: #E6162D; color: #E6162D; }
.share-weibo:hover { background: #E6162D; color: #fff; }
.share-douyin { border-color: #010101; color: #010101; }
.share-douyin:hover { background: #010101; color: #fff; }
.share-bilibili { border-color: #00A1D6; color: #00A1D6; }
.share-bilibili:hover { background: #00A1D6; color: #fff; }

/* ---------- 加入社区指南 ---------- */
.guide-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}
.guide-step {
  text-align: center;
  padding: 28px 20px;
  background: var(--bg2);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
}
.guide-step:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.step-num {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 1.3rem;
  font-weight: 800;
  margin: 0 auto 16px;
}
.guide-step h4 { font-size: 0.95rem; color: var(--text); margin-bottom: 8px; }
.guide-step p { font-size: 0.82rem; color: var(--text-light); line-height: 1.7; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .site-nav { display: none; position: absolute; top: 72px; left: 0; right: 0; background: var(--bg2); flex-direction: column; padding: 16px; box-shadow: 0 8px 20px rgba(0,0,0,0.1); z-index: 999; }
  .site-nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .hero-content h1 { font-size: 2rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .stats-row { flex-wrap: wrap; }
  .stat-item { flex: 0 0 50%; border-bottom: 1px solid var(--border); }
  .section { padding: 50px 0; }
  .section-title h2 { font-size: 1.6rem; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
}
@media (max-width: 480px) {
  .hero-content h1 { font-size: 1.6rem; }
  .hero-stats { gap: 20px; }
  .hero-stat .num { font-size: 1.5rem; }
  .video-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ---------- 懒加载占位 ---------- */
img[data-src] { opacity: 0; transition: opacity 0.4s; }
img.loaded { opacity: 1; }

/* ---------- 滚动动画 ---------- */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ---------- 视频弹窗 ---------- */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.88);
  z-index: 9999;
  align-items: center;
  justify-content: center;
}
.video-modal.open { display: flex; }
.video-modal-inner {
  position: relative;
  width: 90%;
  max-width: 800px;
  background: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.video-modal-close {
  position: absolute;
  top: -40px; right: 0;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px 8px;
}
.video-placeholder {
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, #1a1a1a, #2d2d2d);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
}
.video-placeholder .big-play {
  width: 80px; height: 80px;
  background: rgba(139,26,26,0.8);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.video-placeholder .big-play::after {
  content: '';
  width: 0; height: 0;
  border-style: solid;
  border-width: 16px 0 16px 28px;
  border-color: transparent transparent transparent #fff;
  margin-left: 6px;
}

/* ---------- AI功能卡片 ---------- */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.ai-card {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark2) 100%);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  color: #fff;
  border: 1px solid rgba(212,175,55,0.2);
  transition: var(--transition);
}
.ai-card:hover {
  border-color: var(--gold);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(212,175,55,0.15);
}
.ai-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}
.ai-card h3 { font-size: 1rem; color: var(--gold); margin-bottom: 10px; }
.ai-card p { font-size: 0.85rem; color: rgba(255,255,255,0.7); line-height: 1.7; }

/* ---------- 直播区块 ---------- */
.live-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}
.live-card {
  background: var(--bg2);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.live-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.live-thumb {
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
}
.live-thumb img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.live-badge {
  position: absolute;
  top: 8px; left: 8px;
  background: #E6162D;
  color: #fff;
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 700;
  animation: pulse 1.5s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}
.live-info { padding: 12px; }
.live-info h4 { font-size: 0.88rem; font-weight: 600; margin-bottom: 4px; }
.live-info .viewers { font-size: 0.75rem; color: var(--text-light); }