/* =====================================================
   免费看片 - 游戏解说主题网站 CSS
   原创设计 | jqkkf60.cn
   主色调：深海蓝 #0a0e1a | 霓虹粉 #ff2d78 | 电光紫 #7c3aed
   ===================================================== */

/* ---- CSS变量 ---- */
:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #0f1629;
  --bg-card: #141b2d;
  --bg-card-hover: #1a2340;
  --accent-pink: #ff2d78;
  --accent-purple: #7c3aed;
  --accent-cyan: #00d4ff;
  --accent-gold: #ffd700;
  --text-primary: #e8eaf6;
  --text-secondary: #8892b0;
  --text-muted: #4a5568;
  --border-color: rgba(124,58,237,0.3);
  --border-glow: rgba(255,45,120,0.4);
  --gradient-main: linear-gradient(135deg, #ff2d78 0%, #7c3aed 100%);
  --gradient-dark: linear-gradient(180deg, #0a0e1a 0%, #0f1629 100%);
  --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 20px rgba(255,45,120,0.3);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s ease;
}

/* ---- 基础重置 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--accent-cyan); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-pink); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; outline: none; }

/* ---- 公告栏 ---- */
.notice-bar {
  background: var(--gradient-main);
  color: #fff;
  padding: 8px 0;
  overflow: hidden;
  font-size: 13px;
  font-weight: 500;
}
.notice-bar .nb-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap;
  animation: marquee-scroll 35s linear infinite;
  width: max-content;
}
.notice-bar .nb-tag {
  background: rgba(255,255,255,0.25);
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 12px;
  flex-shrink: 0;
}
@keyframes marquee-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ---- 头部导航 ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10,14,26,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 0 20px;
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
  height: 68px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.site-logo img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  object-fit: cover;
}
.site-logo .logo-text {
  font-size: 20px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 1px;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.site-nav a {
  color: var(--text-secondary);
  font-size: 14px;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}
.site-nav a:hover,
.site-nav a.active {
  color: var(--text-primary);
  background: rgba(255,45,120,0.12);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.btn-search-toggle {
  background: rgba(255,255,255,0.08);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}
.btn-search-toggle:hover { color: var(--text-primary); border-color: var(--accent-pink); }
.btn-join {
  background: var(--gradient-main);
  color: #fff;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: var(--shadow-glow);
}
.btn-join:hover { transform: translateY(-2px); box-shadow: 0 0 30px rgba(255,45,120,0.5); color: #fff; }
.mobile-menu-btn {
  display: none;
  background: none;
  color: var(--text-primary);
  font-size: 22px;
  padding: 4px;
}

/* ---- 搜索框 ---- */
.search-bar {
  background: rgba(15,22,41,0.98);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 20px;
  display: none;
}
.search-bar.active { display: block; }
.search-bar .sb-inner {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  gap: 10px;
}
.search-bar input {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  outline: none;
  transition: var(--transition);
}
.search-bar input:focus { border-color: var(--accent-pink); box-shadow: 0 0 0 3px rgba(255,45,120,0.15); }
.search-bar input::placeholder { color: var(--text-muted); }
.search-bar .btn-do-search {
  background: var(--gradient-main);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
}
.search-hot {
  max-width: 700px;
  margin: 10px auto 0;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.search-hot span { color: var(--text-muted); font-size: 13px; }
.search-hot a {
  background: rgba(124,58,237,0.15);
  color: var(--accent-cyan);
  padding: 3px 12px;
  border-radius: 20px;
  font-size: 12px;
  border: 1px solid rgba(124,58,237,0.3);
}
.search-hot a:hover { background: rgba(255,45,120,0.15); color: var(--accent-pink); border-color: var(--border-glow); }

/* ---- 面包屑 ---- */
.breadcrumb {
  padding: 12px 20px;
  max-width: 1280px;
  margin: 0 auto;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent-pink); }
.breadcrumb .sep { color: var(--text-muted); }

/* ---- 容器 ---- */
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }
.section { padding: 64px 0; }
.section-sm { padding: 40px 0; }

/* ---- 区块标题 ---- */
.section-head {
  text-align: center;
  margin-bottom: 48px;
}
.section-head .badge {
  display: inline-block;
  background: rgba(255,45,120,0.12);
  color: var(--accent-pink);
  border: 1px solid rgba(255,45,120,0.3);
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 12px;
  text-transform: uppercase;
}
.section-head h2 {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.3;
}
.section-head h2 .hl {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-head p {
  color: var(--text-secondary);
  font-size: 16px;
  max-width: 600px;
  margin: 0 auto;
}

/* ---- Hero Banner ---- */
.hero-banner {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/banner_hero.jpg');
  background-size: cover;
  background-position: center top;
  filter: brightness(0.45);
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(10,14,26,0.92) 0%, rgba(10,14,26,0.5) 60%, transparent 100%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 20px;
  width: 100%;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,45,120,0.15);
  border: 1px solid rgba(255,45,120,0.4);
  color: var(--accent-pink);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero-tag .dot {
  width: 8px; height: 8px;
  background: var(--accent-pink);
  border-radius: 50%;
  animation: blink 1.5s infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.3} }
.hero-content h1 {
  font-size: clamp(32px, 5.5vw, 58px);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
  color: #fff;
}
.hero-content h1 .brand-hl {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 18px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 12px;
  max-width: 560px;
}
.hero-desc {
  font-size: 15px;
  color: rgba(255,255,255,0.55);
  margin-bottom: 32px;
  max-width: 520px;
  line-height: 1.8;
}
.hero-btns {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.btn-primary {
  background: var(--gradient-main);
  color: #fff;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 0 40px rgba(255,45,120,0.5); color: #fff; }
.btn-outline {
  background: transparent;
  color: #fff;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 600;
  border: 2px solid rgba(255,255,255,0.3);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}
.btn-outline:hover { border-color: var(--accent-pink); color: var(--accent-pink); }
.hero-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}
.hero-stat { text-align: left; }
.hero-stat .num {
  font-size: 28px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.hero-stat .label { font-size: 13px; color: rgba(255,255,255,0.5); margin-top: 4px; }

/* ---- 视频卡片 ---- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.video-grid-4 { grid-template-columns: repeat(4, 1fr); }
.video-grid-3 { grid-template-columns: repeat(3, 1fr); }
.video-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-pink);
  box-shadow: 0 16px 48px rgba(255,45,120,0.2);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #0d1220;
}
.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);
  opacity: 0;
}
.video-card:hover .play-btn { opacity: 1; background: rgba(0,0,0,0.45); }
.play-icon {
  width: 56px;
  height: 56px;
  background: var(--gradient-main);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 30px rgba(255,45,120,0.6);
  transform: scale(0.8);
  transition: transform 0.3s ease;
}
.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(0,0,0,0.75);
  color: #fff;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 4px;
}
.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--accent-pink);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
  text-transform: uppercase;
}
.video-tag.tag-hot { background: #ff6b35; }
.video-tag.tag-new { background: #00d4ff; color: #0a0e1a; }
.video-tag.tag-live { background: #ff2d78; animation: blink 1.5s infinite; }
.video-info { padding: 14px; }
.video-info h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  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;
  font-size: 12px;
  color: var(--text-muted);
}
.video-meta .author { display: flex; align-items: center; gap: 4px; }
.video-meta .stats { display: flex; gap: 10px; }
.video-meta .stat-item { display: flex; align-items: center; gap: 3px; }

/* ---- 分类标签 ---- */
.cat-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.cat-tab {
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
}
.cat-tab:hover, .cat-tab.active {
  background: var(--gradient-main);
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-glow);
}

/* ---- 功能卡片 ---- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-main);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}
.feature-icon {
  width: 52px;
  height: 52px;
  background: rgba(255,45,120,0.12);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
  border: 1px solid rgba(255,45,120,0.2);
}
.feature-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ---- 专家卡片 ---- */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.expert-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}
.expert-card:hover {
  border-color: var(--accent-purple);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(124,58,237,0.2);
}
.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 14px;
  border: 3px solid var(--accent-purple);
  box-shadow: 0 0 20px rgba(124,58,237,0.4);
}
.expert-card h3 { font-size: 16px; font-weight: 700; color: var(--text-primary); margin-bottom: 4px; }
.expert-role { font-size: 13px; color: var(--accent-pink); margin-bottom: 8px; }
.expert-desc { font-size: 13px; color: var(--text-secondary); margin-bottom: 14px; line-height: 1.6; }
.expert-tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 14px; }
.expert-tag {
  background: rgba(124,58,237,0.12);
  color: var(--accent-purple);
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid rgba(124,58,237,0.25);
}
.expert-btns { display: flex; gap: 8px; justify-content: center; }
.btn-sm {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-sm-outline {
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  background: transparent;
}
.btn-sm-outline:hover { border-color: var(--accent-pink); color: var(--accent-pink); }
.btn-sm-fill {
  background: var(--gradient-main);
  color: #fff;
}
.btn-sm-fill:hover { opacity: 0.85; color: #fff; }

/* ---- 评价卡片 ---- */
.review-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: var(--transition);
}
.review-card:hover { border-color: var(--border-glow); transform: translateY(-3px); }
.review-stars { color: var(--accent-gold); font-size: 14px; margin-bottom: 10px; letter-spacing: 2px; }
.review-text { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 14px; }
.review-user { display: flex; align-items: center; gap: 10px; }
.review-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.review-name { font-size: 14px; font-weight: 600; color: var(--text-primary); }
.review-date { font-size: 12px; color: var(--text-muted); }

/* ---- FAQ ---- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card);
  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(--accent-pink); }
.faq-q {
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  gap: 12px;
}
.faq-q .faq-icon {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: rgba(255,45,120,0.12);
  border: 1px solid rgba(255,45,120,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--accent-pink);
  flex-shrink: 0;
  transition: transform 0.3s;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-a {
  padding: 0 22px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}
.faq-item.open .faq-a { max-height: 300px; padding: 0 22px 18px; }

/* ---- 合作品牌 ---- */
.partner-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  align-items: center;
}
.partner-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-secondary);
  transition: var(--transition);
}
.partner-item:hover { border-color: var(--accent-purple); color: var(--accent-cyan); }

/* ---- 社区功能 ---- */
.community-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.community-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}
.community-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,212,255,0.15);
}
.community-emoji { font-size: 40px; margin-bottom: 12px; }
.community-card h3 { font-size: 16px; font-weight: 700; color: var(--text-primary); margin-bottom: 6px; }
.community-card p { font-size: 13px; color: var(--text-secondary); }
.community-count { font-size: 22px; font-weight: 800; color: var(--accent-cyan); margin-top: 10px; }

/* ---- AI赋能 ---- */
.ai-section {
  background: linear-gradient(135deg, rgba(124,58,237,0.08) 0%, rgba(255,45,120,0.05) 100%);
  border: 1px solid rgba(124,58,237,0.2);
  border-radius: var(--radius-lg);
  padding: 48px;
}
.ai-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.ai-features { display: flex; flex-direction: column; gap: 20px; }
.ai-feature-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.ai-feature-icon {
  width: 44px; height: 44px;
  background: rgba(124,58,237,0.15);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
  border: 1px solid rgba(124,58,237,0.25);
}
.ai-feature-item h4 { font-size: 15px; font-weight: 700; color: var(--text-primary); margin-bottom: 4px; }
.ai-feature-item p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* ---- 联系我们 ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
}
.contact-card h3 { font-size: 20px; font-weight: 700; color: var(--text-primary); margin-bottom: 20px; }
.contact-info-list { display: flex; flex-direction: column; gap: 14px; }
.contact-info-item { display: flex; align-items: flex-start; gap: 12px; }
.ci-icon {
  width: 36px; height: 36px;
  background: rgba(255,45,120,0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}
.ci-label { font-size: 12px; color: var(--text-muted); margin-bottom: 2px; }
.ci-value { font-size: 14px; color: var(--text-primary); font-weight: 500; }
.qr-row { display: flex; gap: 20px; margin-top: 20px; }
.qr-item { text-align: center; }
.qr-placeholder {
  width: 100px; height: 100px;
  background: var(--bg-secondary);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 6px;
  flex-direction: column;
  gap: 4px;
}
.qr-label { font-size: 12px; color: var(--text-muted); }

/* ---- 分享按钮 ---- */
.share-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.share-bar .share-label { font-size: 14px; color: var(--text-muted); }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
  border: 1px solid transparent;
}
.share-btn:hover { transform: translateY(-2px); }
.share-wechat { background: rgba(9,187,7,0.12); color: #09bb07; border-color: rgba(9,187,7,0.3); }
.share-weibo { background: rgba(230,22,45,0.12); color: #e6162d; border-color: rgba(230,22,45,0.3); }
.share-douyin { background: rgba(0,212,255,0.12); color: var(--accent-cyan); border-color: rgba(0,212,255,0.3); }
.share-bili { background: rgba(0,161,214,0.12); color: #00a1d6; border-color: rgba(0,161,214,0.3); }

/* ---- 统计数字 ---- */
.stats-section {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-card) 100%);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 40px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-item .stat-num {
  font-size: 36px;
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 6px;
}
.stat-item .stat-label { font-size: 14px; color: var(--text-secondary); }

/* ---- 页脚 ---- */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-brand .logo-row img { width: 40px; height: 40px; border-radius: 8px; }
.footer-brand .logo-row span {
  font-size: 18px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-brand p { font-size: 14px; color: var(--text-muted); line-height: 1.8; margin-bottom: 20px; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: var(--text-primary); margin-bottom: 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a { font-size: 14px; color: var(--text-muted); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--accent-pink); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: 13px; color: var(--text-muted); }
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--accent-pink); }
.footer-links { display: flex; gap: 20px; }

/* ---- 回到顶部 ---- */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: var(--gradient-main);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
  box-shadow: var(--shadow-glow);
  z-index: 999;
  border: none;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px); }

/* ---- 视频播放弹窗 ---- */
.video-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.88);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.video-modal.open { opacity: 1; pointer-events: all; }
.modal-inner {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  width: 90%;
  max-width: 860px;
  overflow: hidden;
  transform: scale(0.9);
  transition: transform 0.3s;
}
.video-modal.open .modal-inner { transform: scale(1); }
.modal-header {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}
.modal-header h4 { font-size: 16px; font-weight: 700; color: var(--text-primary); }
.modal-close {
  background: rgba(255,255,255,0.08);
  color: var(--text-secondary);
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}
.modal-close:hover { background: var(--accent-pink); color: #fff; }
.modal-video-wrap {
  aspect-ratio: 16/9;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 15px;
  flex-direction: column;
  gap: 12px;
}
.modal-video-wrap .play-demo {
  font-size: 48px;
  opacity: 0.4;
}

/* ---- 内页 Hero ---- */
.page-hero {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-card) 100%);
  border-bottom: 1px solid var(--border-color);
  padding: 48px 0;
}
.page-hero h1 { font-size: clamp(26px, 4vw, 40px); font-weight: 800; color: var(--text-primary); margin-bottom: 10px; }
.page-hero p { font-size: 16px; color: var(--text-secondary); max-width: 600px; }

/* ---- 分页 ---- */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.page-btn {
  width: 38px; height: 38px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}
.page-btn:hover, .page-btn.active {
  background: var(--gradient-main);
  color: #fff;
  border-color: transparent;
}

/* ---- 响应式 ---- */
@media (max-width: 1100px) {
  .video-grid-4 { grid-template-columns: repeat(3, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .community-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .video-grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .site-nav { display: none; }
  .mobile-menu-btn { display: flex; }
  .header-actions .btn-join { display: none; }
  .video-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .hero-content h1 { font-size: 28px; }
  .hero-stats { gap: 20px; }
  .section { padding: 40px 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .ai-section { padding: 28px; }
}
@media (max-width: 480px) {
  .video-grid, .video-grid-4, .video-grid-3 { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: 1fr 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---- 移动端导航 ---- */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10,14,26,0.97);
  z-index: 9998;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  transition: var(--transition);
}
.mobile-nav a:hover { color: var(--accent-pink); }
.mobile-nav-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: none;
  color: var(--text-secondary);
  font-size: 28px;
  border: none;
  cursor: pointer;
}

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

/* ---- 通用工具类 ---- */
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-12 { gap: 12px; }