/* =====================================================
   91 - 女神视频视频社区 | 主样式文件
   域名: y95l5f.cn
   ===================================================== */

/* ---- CSS变量 ---- */
:root {
  --primary: #e8420a;
  --primary-dark: #b83208;
  --secondary: #1a1a2e;
  --accent: #f5a623;
  --dark: #0d0d0d;
  --dark2: #161616;
  --dark3: #1e1e1e;
  --gray: #888;
  --light-gray: #c8c8c8;
  --white: #ffffff;
  --text: #e0e0e0;
  --border: #2a2a2a;
  --card-bg: #1a1a1a;
  --gradient-hero: linear-gradient(135deg, rgba(13,13,13,0.92) 0%, rgba(232,66,10,0.18) 100%);
  --shadow: 0 4px 24px rgba(0,0,0,0.5);
  --radius: 8px;
  --radius-lg: 16px;
  --transition: all 0.3s ease;
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
}

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

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

/* =====================================================
   顶部公告栏
   ===================================================== */
.top-bar {
  background: var(--primary);
  color: #fff;
  text-align: center;
  padding: 7px 20px;
  font-size: 13px;
  letter-spacing: 0.5px;
}
.top-bar a { color: #fff; font-weight: 600; }

/* =====================================================
   头部导航
   ===================================================== */
.site-header {
  background: rgba(13,13,13,0.97);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 2px solid var(--primary);
  backdrop-filter: blur(10px);
}
.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;
  text-decoration: none;
}
.logo-icon {
  width: 44px;
  height: 44px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 900;
  color: #fff;
  letter-spacing: -1px;
  box-shadow: 0 2px 12px rgba(232,66,10,0.5);
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.logo-text .brand { font-size: 20px; font-weight: 800; color: #fff; }
.logo-text .slogan { font-size: 11px; color: var(--gray); letter-spacing: 1px; }

/* 主导航 */
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  padding: 8px 14px;
  color: var(--light-gray);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius);
  transition: var(--transition);
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active {
  color: #fff;
  background: var(--primary);
}

/* 汉堡菜单 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  padding: 6px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}

/* =====================================================
   搜索框
   ===================================================== */
.search-bar-wrap {
  background: var(--dark2);
  border-bottom: 1px solid var(--border);
  padding: 10px 20px;
}
.search-bar-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
}
.search-form {
  display: flex;
  align-items: center;
  background: var(--dark3);
  border: 1px solid var(--border);
  border-radius: 24px;
  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(232,66,10,0.15); }
.search-form input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  padding: 9px 18px;
  color: var(--text);
  font-size: 14px;
  font-family: var(--font-main);
}
.search-form input::placeholder { color: var(--gray); }
.search-form button {
  background: var(--primary);
  color: #fff;
  padding: 9px 20px;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.search-form button:hover { background: var(--primary-dark); }
.search-hot-tags { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.search-hot-tags span { font-size: 12px; color: var(--gray); }
.hot-tag {
  font-size: 12px;
  padding: 3px 10px;
  background: var(--dark3);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--light-gray);
  cursor: pointer;
  transition: var(--transition);
}
.hot-tag:hover { border-color: var(--primary); color: var(--primary); }

/* =====================================================
   面包屑
   ===================================================== */
.breadcrumb-wrap {
  background: var(--dark2);
  padding: 8px 20px;
  border-bottom: 1px solid var(--border);
}
.breadcrumb {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--gray);
}
.breadcrumb a { color: var(--gray); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--light-gray); }

/* =====================================================
   Hero Banner
   ===================================================== */
.hero-section {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  filter: brightness(0.55);
  transform: scale(1.05);
  transition: transform 8s ease;
}
.hero-section:hover .hero-bg { transform: scale(1.0); }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 20px;
  width: 100%;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(232,66,10,0.2);
  border: 1px solid var(--primary);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 13px;
  color: var(--primary);
  margin-bottom: 20px;
}
.hero-badge::before { content: '●'; font-size: 8px; animation: blink 1.5s infinite; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.3} }
.hero-title {
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 900;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 16px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.5);
}
.hero-title .highlight { color: var(--primary); }
.hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  max-width: 600px;
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  background: var(--primary);
  color: #fff;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 700;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 16px rgba(232,66,10,0.4);
}
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(232,66,10,0.5); }
.btn-outline {
  background: transparent;
  color: #fff;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  border: 2px solid rgba(255,255,255,0.4);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-outline:hover { border-color: #fff; color: #fff; background: rgba(255,255,255,0.1); transform: translateY(-2px); }
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-num { font-size: 2rem; font-weight: 900; color: var(--primary); display: block; }
.stat-label { font-size: 12px; color: rgba(255,255,255,0.6); }

/* =====================================================
   通用区块
   ===================================================== */
.section { padding: 70px 20px; }
.section-inner { max-width: 1280px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-tag {
  display: inline-block;
  background: rgba(232,66,10,0.12);
  color: var(--primary);
  border: 1px solid rgba(232,66,10,0.3);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}
.section-title .em { color: var(--primary); }
.section-desc { font-size: 15px; color: var(--gray); max-width: 560px; margin: 0 auto; }
.section-alt { background: var(--dark2); }
.section-dark { background: var(--secondary); }

/* =====================================================
   视频卡片
   ===================================================== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary);
  box-shadow: 0 12px 36px rgba(232,66,10,0.2);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--dark3);
}
/* H5 video标签与poster图叠加 */
.video-thumb video.video-preview {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.3s;
  z-index: 1;
}
.video-thumb .video-poster-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb video.video-preview { opacity: 1; }
.video-card:hover .video-thumb .video-poster-img { transform: scale(1.08); }
.video-thumb .play-btn { z-index: 2; }
.video-thumb .video-duration { z-index: 3; }
.video-thumb .video-tag { z-index: 3; }
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.08); }
.play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: var(--transition);
  opacity: 0;
}
.video-card:hover .play-btn { opacity: 1; background: rgba(0,0,0,0.45); }
.play-icon {
  width: 56px;
  height: 56px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(232,66,10,0.6);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon::after {
  content: '';
  border-left: 20px solid #fff;
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
  margin-left: 4px;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.8);
  color: #fff;
  font-size: 12px;
  padding: 2px 7px;
  border-radius: 4px;
  font-weight: 600;
}
.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 700;
}
.video-info { padding: 14px 16px; }
.video-title {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--gray);
  flex-wrap: wrap;
}
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-meta .views::before { content: '▶'; font-size: 10px; }
.video-meta .likes::before { content: '♥'; color: var(--primary); }
.video-meta .comments::before { content: '💬'; }

/* =====================================================
   功能模块卡片
   ===================================================== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--primary);
  transform: scaleX(0);
  transition: var(--transition);
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: var(--shadow); }
.feature-icon {
  width: 52px;
  height: 52px;
  background: rgba(232,66,10,0.12);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
}
.feature-title { font-size: 17px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.feature-desc { font-size: 13px; color: var(--gray); line-height: 1.6; }

/* =====================================================
   专家团队
   ===================================================== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}
.team-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  text-align: center;
}
.team-card:hover { border-color: var(--primary); transform: translateY(-5px); box-shadow: var(--shadow); }
.team-avatar {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  object-position: top;
}
.team-info { padding: 18px 16px; }
.team-name { font-size: 17px; font-weight: 700; color: #fff; margin-bottom: 4px; }
.team-role { font-size: 13px; color: var(--primary); margin-bottom: 8px; font-weight: 600; }
.team-desc { font-size: 12px; color: var(--gray); line-height: 1.6; margin-bottom: 14px; }
.team-actions { display: flex; gap: 8px; justify-content: center; }
.btn-sm {
  padding: 6px 14px;
  font-size: 12px;
  border-radius: 6px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-sm-primary { background: var(--primary); color: #fff; }
.btn-sm-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-sm-outline { background: transparent; color: var(--light-gray); border: 1px solid var(--border); }
.btn-sm-outline:hover { border-color: var(--primary); color: var(--primary); }

/* =====================================================
   用户评价
   ===================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  transition: var(--transition);
}
.review-card:hover { border-color: var(--primary); 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(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.review-user-info .name { font-size: 15px; font-weight: 700; color: #fff; }
.review-user-info .tag { font-size: 12px; color: var(--gray); }
.stars { color: var(--accent); font-size: 14px; letter-spacing: 2px; margin-bottom: 10px; }
.review-text { font-size: 14px; color: var(--light-gray); line-height: 1.7; }
.review-date { font-size: 12px; color: var(--gray); margin-top: 10px; }

/* =====================================================
   FAQ
   ===================================================== */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open { border-color: var(--primary); }
.faq-question {
  padding: 18px 22px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  user-select: none;
}
.faq-question:hover { color: var(--primary); }
.faq-arrow {
  width: 24px;
  height: 24px;
  background: var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
  font-size: 12px;
  color: var(--gray);
}
.faq-item.open .faq-arrow { background: var(--primary); color: #fff; transform: rotate(180deg); }
.faq-answer {
  display: none;
  padding: 0 22px 18px;
  font-size: 14px;
  color: var(--gray);
  line-height: 1.8;
}
.faq-item.open .faq-answer { display: block; }

/* =====================================================
   合作品牌Logo墙
   ===================================================== */
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  align-items: center;
}
.partner-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 24px;
  min-width: 120px;
  text-align: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--gray);
  transition: var(--transition);
}
.partner-item:hover { border-color: var(--primary); color: var(--primary); transform: scale(1.05); }

/* =====================================================
   加入社区指南
   ===================================================== */
.join-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
  counter-reset: step;
}
.join-step {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  text-align: center;
  position: relative;
  transition: var(--transition);
}
.join-step:hover { border-color: var(--primary); transform: translateY(-4px); }
.step-num {
  width: 40px;
  height: 40px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 900;
  color: #fff;
  margin: 0 auto 14px;
}
.step-title { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.step-desc { font-size: 13px; color: var(--gray); line-height: 1.6; }

/* =====================================================
   联系我们
   ===================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}
.contact-info-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
}
.contact-info-card h3 { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 20px; padding-bottom: 14px; border-bottom: 1px solid var(--border); }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 14px;
}
.contact-icon {
  width: 36px;
  height: 36px;
  background: rgba(232,66,10,0.12);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}
.contact-label { font-size: 12px; color: var(--gray); }
.contact-value { color: var(--text); font-weight: 500; }
.qr-grid { display: flex; gap: 20px; flex-wrap: wrap; }
.qr-item { text-align: center; }
.qr-code {
  width: 110px;
  height: 110px;
  background: #fff;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
  overflow: hidden;
}
.qr-code canvas { width: 100%; height: 100%; }
.qr-label { font-size: 12px; color: var(--gray); }

/* =====================================================
   社交分享
   ===================================================== */
.share-bar {
  background: var(--dark2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 14px 20px;
}
.share-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.share-label { font-size: 13px; color: var(--gray); font-weight: 600; }
.share-btns { display: flex; gap: 8px; flex-wrap: wrap; }
.share-btn {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}
.share-wechat { background: #07c160; color: #fff; }
.share-weibo { background: #e6162d; color: #fff; }
.share-douyin { background: #161823; color: #fff; border: 1px solid #69c9d0; }
.share-bilibili { background: #00a1d6; color: #fff; }
.share-btn:hover { opacity: 0.85; transform: scale(1.05); color: #fff; }

/* =====================================================
   AI赋能区块
   ===================================================== */
.ai-section {
  background: linear-gradient(135deg, var(--secondary) 0%, var(--dark2) 100%);
  position: relative;
  overflow: hidden;
}
.ai-section::before {
  content: 'AI';
  position: absolute;
  right: -40px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 300px;
  font-weight: 900;
  color: rgba(232,66,10,0.04);
  pointer-events: none;
  line-height: 1;
}
.ai-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.ai-features { display: flex; flex-direction: column; gap: 16px; }
.ai-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: var(--transition);
}
.ai-feature-item:hover { border-color: var(--primary); background: rgba(232,66,10,0.06); }
.ai-feature-icon { font-size: 28px; flex-shrink: 0; }
.ai-feature-title { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 4px; }
.ai-feature-desc { font-size: 13px; color: var(--gray); line-height: 1.6; }
.ai-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.ai-visual img { width: 100%; border-radius: var(--radius-lg); }
.ai-visual-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13,13,13,0.7) 0%, transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: 20px;
}
.ai-badge {
  background: var(--primary);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 700;
}

/* =====================================================
   页脚
   ===================================================== */
.site-footer {
  background: var(--dark2);
  border-top: 2px solid var(--border);
  padding: 50px 20px 0;
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}
.footer-brand .site-logo { margin-bottom: 14px; }
.footer-brand p { font-size: 13px; color: var(--gray); line-height: 1.8; max-width: 280px; }
.footer-social { display: flex; gap: 10px; margin-top: 16px; }
.social-icon {
  width: 36px;
  height: 36px;
  background: var(--dark3);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  color: var(--gray);
  transition: var(--transition);
}
.social-icon:hover { background: var(--primary); border-color: var(--primary); color: #fff; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: 13px; color: var(--gray); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--primary); padding-left: 4px; }
.footer-bottom {
  padding: 18px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: var(--gray);
}
.footer-bottom a { color: var(--gray); }
.footer-bottom a:hover { color: var(--primary); }
.footer-update { color: var(--gray); font-size: 12px; }

/* =====================================================
   内页横幅
   ===================================================== */
.page-banner {
  background: linear-gradient(135deg, var(--dark2) 0%, var(--secondary) 100%);
  padding: 60px 20px;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.page-banner::after {
  content: '';
  position: absolute;
  right: 0; top: 0; bottom: 0;
  width: 40%;
  background: linear-gradient(to left, rgba(232,66,10,0.08), transparent);
}
.page-banner-inner { max-width: 1280px; margin: 0 auto; position: relative; z-index: 1; }
.page-banner h1 { font-size: clamp(1.8rem, 4vw, 3rem); font-weight: 900; color: #fff; margin-bottom: 10px; }
.page-banner p { font-size: 15px; color: var(--gray); max-width: 560px; }

/* =====================================================
   视频播放模态框
   ===================================================== */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.video-modal.active { display: flex; }
.modal-inner {
  background: var(--dark2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  width: 100%;
  max-width: 900px;
  border: 1px solid var(--border);
}
.modal-header {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}
.modal-title { font-size: 16px; font-weight: 700; color: #fff; }
.modal-close {
  background: var(--border);
  color: var(--gray);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  transition: var(--transition);
}
.modal-close:hover { background: var(--primary); color: #fff; }
.modal-video { width: 100%; aspect-ratio: 16/9; background: #000; }
.modal-video video { width: 100%; height: 100%; }

/* =====================================================
   标签页
   ===================================================== */
.tabs { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 28px; }
.tab-btn {
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--gray);
  background: var(--card-bg);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.tab-btn.active, .tab-btn:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* =====================================================
   响应式
   ===================================================== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .main-nav { display: none; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0; background: var(--dark); border-bottom: 2px solid var(--primary); padding: 10px; gap: 2px; }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 10px 16px; border-radius: 6px; }
  .nav-toggle { display: flex; }
  .hero-section { min-height: 420px; }
  .hero-stats { gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .search-hot-tags { display: none; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
  .video-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: 1fr; }
}

/* =====================================================
   动画
   ===================================================== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in { animation: fadeInUp 0.6s ease forwards; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }

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

/* =====================================================
   通知条
   ===================================================== */
.notice-bar {
  background: linear-gradient(90deg, var(--dark2), var(--dark3));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  font-size: 14px;
}
.notice-icon { font-size: 18px; }
.notice-text { color: var(--light-gray); }
.notice-text strong { color: var(--primary); }

/* 数字统计条 */
.stats-bar {
  background: var(--primary);
  padding: 20px;
}
.stats-bar-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 20px;
}
.stats-bar-item { text-align: center; color: #fff; }
.stats-bar-num { font-size: 2rem; font-weight: 900; display: block; }
.stats-bar-label { font-size: 12px; opacity: 0.85; }