/* ================================================
   抖音风 - 霓虹赛博朋克主题 CSS
   Domain: conbhr.cn
   Version: 3.0 - 全新原创设计
   ================================================ */

/* ---- CSS变量 ---- */
:root {
  --primary: #7B2FFF;
  --secondary: #00D4FF;
  --accent: #FF2D78;
  --bg-dark: #0C0D14;
  --bg-card: #13141F;
  --bg-surface: #1A1B2E;
  --bg-hover: #22233A;
  --text-primary: #F0F0FF;
  --text-secondary: #9899B8;
  --text-muted: #5A5B7A;
  --border: rgba(123,47,255,0.25);
  --border-light: rgba(0,212,255,0.15);
  --glow-purple: 0 0 20px rgba(123,47,255,0.4);
  --glow-blue: 0 0 20px rgba(0,212,255,0.4);
  --glow-pink: 0 0 20px rgba(255,45,120,0.4);
  --gradient-main: linear-gradient(135deg, #7B2FFF 0%, #00D4FF 100%);
  --gradient-card: linear-gradient(145deg, #13141F 0%, #1A1B2E 100%);
  --gradient-hero: linear-gradient(135deg, rgba(12,13,20,0.95) 0%, rgba(26,27,46,0.85) 50%, rgba(12,13,20,0.95) 100%);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}

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

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

/* ---- 布局容器 ---- */
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }
.container-wide { max-width: 1440px; margin: 0 auto; padding: 0 24px; }
.section { padding: 70px 0; }
.section-sm { padding: 40px 0; }

/* ---- 公告栏 ---- */
.ax46dc4 {
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent), var(--primary));
  background-size: 300% 100%;
  animation: gradientShift 4s ease infinite;
  padding: 8px 0;
  text-align: center;
  font-size: 13px;
  font-weight: 500;
  color: #fff;
  letter-spacing: 0.5px;
}
@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
.ax46dc4 a { color: #fff; font-weight: 700; }

/* ---- 顶部导航 ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(12, 13, 20, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 30px rgba(0,0,0,0.5);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 68px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}
.site-logo img.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  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;
  white-space: nowrap;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.main-nav a {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}
.main-nav a:hover,
.main-nav a.active {
  color: var(--text-primary);
  background: rgba(123,47,255,0.15);
}
.main-nav a.active { color: var(--secondary); }

/* ---- 搜索框 ---- */
.header-search {
  display: flex;
  align-items: center;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 0 16px;
  gap: 8px;
  transition: var(--transition);
  min-width: 220px;
}
.header-search:focus-within {
  border-color: var(--primary);
  box-shadow: var(--glow-purple);
}
.header-search input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 14px;
  padding: 8px 0;
  width: 100%;
}
.header-search input::placeholder { color: var(--text-muted); }
.header-search button {
  color: var(--text-muted);
  font-size: 16px;
  padding: 4px;
  transition: var(--transition);
}
.header-search button:hover { color: var(--secondary); }

/* 汉堡菜单 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---- Hero区域 ---- */
.hero-section {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero_bg.jpg');
  background-size: cover;
  background-position: center top;
  filter: brightness(0.45) saturate(1.2);
  z-index: 0;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(123,47,255,0.2) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(0,212,255,0.15) 0%, transparent 60%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(123,47,255,0.2);
  border: 1px solid rgba(123,47,255,0.4);
  color: var(--secondary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: var(--radius-xl);
  margin-bottom: 20px;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--secondary);
  border-radius: 50%;
  animation: pulse 1.5s ease infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}
.hero-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.hero-title .brand-highlight {
  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;
  max-width: 560px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 48px;
  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: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ---- 按钮系统 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-xl);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient-main);
  color: #fff;
  box-shadow: var(--glow-purple);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(123,47,255,0.6);
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--secondary);
  color: var(--secondary);
  background: rgba(0,212,255,0.08);
}
.btn-sm { padding: 8px 18px; font-size: 13px; }
.btn-accent {
  background: linear-gradient(135deg, var(--accent), #FF6B9D);
  color: #fff;
  box-shadow: var(--glow-pink);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(255,45,120,0.6);
  color: #fff;
}

/* ---- 区块标题 ---- */
.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 36px;
  gap: 16px;
}
.section-title-wrap { flex: 1; }
.section-eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 8px;
}
.section-title {
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.3;
}
.section-title .accent { color: var(--secondary); }
.section-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 8px;
}
.section-more {
  color: var(--secondary);
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}
.section-more:hover { color: var(--primary); }

/* ---- 频道导航标签 ---- */
.channel-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  margin-bottom: 32px;
  scrollbar-width: none;
}
.channel-tabs::-webkit-scrollbar { display: none; }
.channel-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: var(--radius-xl);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  white-space: nowrap;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}
.channel-tab:hover,
.channel-tab.active {
  color: var(--text-primary);
  border-color: var(--primary);
  background: rgba(123,47,255,0.15);
  box-shadow: var(--glow-purple);
}
.channel-tab .tab-icon { font-size: 16px; }

/* ---- 视频卡片 ---- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.video-grid-4 { grid-template-columns: repeat(4, 1fr); }
.video-grid-3 { grid-template-columns: repeat(3, 1fr); }
.video-grid-5 { grid-template-columns: repeat(5, 1fr); }

.video-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none;
  display: block;
}
.video-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4), var(--glow-purple);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-surface);
}
.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); }

/* 播放按钮覆盖层 */
.video-play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.video-card:hover .video-play-overlay {
  background: rgba(0,0,0,0.45);
}
.play-btn-circle {
  width: 52px;
  height: 52px;
  background: rgba(123,47,255,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.7);
  transition: var(--transition);
  box-shadow: 0 0 30px rgba(123,47,255,0.8);
}
.video-card:hover .play-btn-circle {
  opacity: 1;
  transform: scale(1);
}
.play-btn-circle svg {
  width: 20px;
  height: 20px;
  fill: #fff;
  margin-left: 3px;
}

/* 视频标签 */
.video-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}
.video-badge.hd { background: var(--primary); }
.video-badge.new { background: #00C853; }
.video-badge.hot { background: #FF6D00; }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 4px;
}

/* 视频信息 */
.video-info {
  padding: 14px;
}
.video-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
}
.video-meta-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
.video-meta span {
  display: flex;
  align-items: center;
  gap: 3px;
}
.video-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.video-tag {
  font-size: 11px;
  color: var(--secondary);
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.2);
  padding: 2px 8px;
  border-radius: 4px;
}

/* ---- 大Banner卡片 ---- */
.feature-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16/7;
  cursor: pointer;
}
.feature-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.feature-card:hover img { transform: scale(1.04); }
.feature-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(12,13,20,0.9) 0%, rgba(12,13,20,0.4) 60%, transparent 100%);
  display: flex;
  align-items: center;
  padding: 40px;
}
.feature-card-content { max-width: 480px; }
.feature-card-content h3 {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 12px;
  color: #fff;
}
.feature-card-content p {
  font-size: 14px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 20px;
  line-height: 1.7;
}

/* ---- 内容分类模块 ---- */
.content-modules {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.content-module {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.content-module::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-main);
  opacity: 0;
  transition: var(--transition);
}
.content-module:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}
.content-module:hover::before { opacity: 1; }
.module-icon {
  width: 48px;
  height: 48px;
  background: rgba(123,47,255,0.15);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
  border: 1px solid rgba(123,47,255,0.3);
}
.content-module h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}
.content-module p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}
.module-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.module-tag {
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 20px;
  background: rgba(0,212,255,0.1);
  color: var(--secondary);
  border: 1px solid rgba(0,212,255,0.2);
}

/* ---- AI赋能模块 ---- */
.ai-section {
  background: linear-gradient(135deg, rgba(123,47,255,0.08) 0%, rgba(0,212,255,0.05) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 50px;
  position: relative;
  overflow: hidden;
}
.ai-section::before {
  content: 'AI';
  position: absolute;
  right: -20px;
  top: -30px;
  font-size: 200px;
  font-weight: 900;
  color: rgba(123,47,255,0.04);
  line-height: 1;
  pointer-events: none;
}
.ai-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.ai-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.ai-feature {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: var(--transition);
}
.ai-feature:hover {
  border-color: var(--secondary);
  box-shadow: var(--glow-blue);
}
.ai-feature-icon { font-size: 28px; margin-bottom: 10px; }
.ai-feature h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}
.ai-feature p {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ---- 社区功能 ---- */
.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-md);
  padding: 24px 20px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
}
.community-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--glow-pink);
}
.community-icon {
  font-size: 36px;
  margin-bottom: 12px;
}
.community-card h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.community-card p {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.community-live-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(255,45,120,0.15);
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  margin-top: 10px;
  border: 1px solid rgba(255,45,120,0.3);
}
.community-live-badge::before {
  content: '';
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 1s ease infinite;
}

/* ---- 专家团队 ---- */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.expert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: var(--transition);
  text-align: center;
}
.expert-card:hover {
  border-color: var(--primary);
  box-shadow: var(--glow-purple);
  transform: translateY(-3px);
}
.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px;
  border: 3px solid var(--primary);
  box-shadow: var(--glow-purple);
}
.expert-name {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text-primary);
}
.expert-title {
  font-size: 12px;
  color: var(--secondary);
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}
.expert-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}
.expert-awards {
  display: flex;
  gap: 6px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.expert-award {
  font-size: 11px;
  background: rgba(123,47,255,0.12);
  color: var(--primary);
  border: 1px solid rgba(123,47,255,0.25);
  padding: 3px 10px;
  border-radius: 20px;
}
.expert-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
}

/* ---- 合作品牌 ---- */
.ax5uweg6 {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
}
.gunb1 {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition);
}
.gunb1:hover {
  border-color: var(--secondary);
  color: var(--secondary);
  background: rgba(0,212,255,0.08);
}

/* ---- FAQ ---- */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--primary); }
.faq-item.open { border-color: var(--primary); box-shadow: var(--glow-purple); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  cursor: pointer;
  gap: 16px;
}
.faq-q-text {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  flex: 1;
}
.faq-icon {
  width: 28px;
  height: 28px;
  background: rgba(123,47,255,0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 18px;
  font-weight: 300;
  flex-shrink: 0;
  transition: var(--transition);
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--primary); color: #fff; }
.faq-answer {
  display: none;
  padding: 0 24px 18px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  border-top: 1px solid var(--border);
}
.faq-item.open .faq-answer { display: block; }

/* ---- 用户评价 ---- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: var(--transition);
}
.review-card:hover {
  border-color: var(--secondary);
  transform: translateY(-2px);
}
.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.review-user-info { flex: 1; }
.review-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}
.review-date {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}
.review-stars {
  color: #FFB800;
  font-size: 13px;
  margin-bottom: 10px;
}
.review-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.review-tag {
  display: inline-block;
  margin-top: 10px;
  font-size: 11px;
  color: var(--secondary);
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.2);
  padding: 2px 8px;
  border-radius: 4px;
}

/* ---- 联系/社交 ---- */
.contact-section {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 50px;
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 40px;
}
.contact-group h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-size: 14px;
  color: var(--text-secondary);
}
.contact-item .icon { font-size: 16px; color: var(--secondary); }
.cfkysb4 {
  display: flex;
  gap: 20px;
}
.2u6q9 { text-align: center; }
.05uut5 {
  width: 90px;
  height: 90px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin-bottom: 8px;
}
.yg2lws5k {
  font-size: 11px;
  color: var(--text-muted);
}
.7chf6a0 {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
}
.m5cfw {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-secondary);
  transition: var(--transition);
  text-decoration: none;
}
.m5cfw:hover {
  border-color: var(--secondary);
  color: var(--secondary);
}

/* ---- 页脚 ---- */
.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo-text {
  font-size: 22px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
  display: block;
}
.footer-brand p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.footer-col ul li {
  margin-bottom: 8px;
}
.footer-col ul li a {
  font-size: 13px;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--secondary); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copyright {
  font-size: 12px;
  color: var(--text-muted);
}
.footer-copyright a { color: var(--secondary); }
.footer-update {
  font-size: 12px;
  color: var(--text-muted);
}
.footer-links {
  display: flex;
  gap: 16px;
}
.footer-links a {
  font-size: 12px;
  color: var(--text-muted);
}
.footer-links a:hover { color: var(--secondary); }

/* ---- 内页通用 ---- */
.page-hero {
  background: linear-gradient(135deg, rgba(123,47,255,0.12) 0%, rgba(0,212,255,0.08) 100%);
  border-bottom: 1px solid var(--border);
  padding: 50px 0;
}
.page-hero h1 {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 800;
  margin-bottom: 10px;
}
.page-hero p {
  font-size: 15px;
  color: var(--text-secondary);
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--secondary); }
.breadcrumb span { color: var(--text-muted); }

/* 内页布局 */
.page-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 30px;
  padding: 40px 0;
}
.page-main { min-width: 0; }
.page-sidebar { min-width: 0; }

/* 侧边栏组件 */
.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 20px;
}
.sidebar-widget h3 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.sidebar-video-item {
  display: flex;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}
.sidebar-video-item:hover .sidebar-video-title { color: var(--secondary); }
.sidebar-video-thumb {
  width: 80px;
  height: 50px;
  border-radius: 6px;
  object-fit: cover;
  flex-shrink: 0;
}
.sidebar-video-title {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
  transition: var(--transition);
}
.sidebar-video-meta {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* 分页 */
.pagination {
  display: flex;
  gap: 8px;
  justify-content: center;
  padding: 30px 0;
  flex-wrap: wrap;
}
.page-btn {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}
.page-btn:hover,
.page-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: var(--glow-purple);
}

/* ---- 视频播放页 ---- */
.player-section {
  background: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 20px;
  aspect-ratio: 16/9;
  position: relative;
}
.player-section video {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.player-info {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 20px;
}
.player-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}
.player-meta {
  display: flex;
  gap: 20px;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.player-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  flex-wrap: wrap;
}

/* ---- 工具提示 Toast ---- */
.k21r3e {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 12px 24px;
  border-radius: var(--radius-xl);
  font-size: 14px;
  z-index: 9999;
  opacity: 0;
  transition: all 0.3s ease;
  box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}
.k21r3e.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---- 加载动画 ---- */
.skeleton {
  background: linear-gradient(90deg, var(--bg-surface) 25%, var(--bg-hover) 50%, var(--bg-surface) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ---- 标签云 ---- */
.klkme {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.9c7eex8 {
  font-size: 12px;
  padding: 5px 14px;
  border-radius: var(--radius-xl);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}
.9c7eex8:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(123,47,255,0.1);
}

/* ---- 响应式 ---- */
@media (max-width: 1200px) {
  .video-grid-5 { grid-template-columns: repeat(4, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 1024px) {
  .video-grid-4 { grid-template-columns: repeat(3, 1fr); }
  .content-modules { grid-template-columns: repeat(2, 1fr); }
  .ai-grid { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: repeat(2, 1fr); }
  .experts-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr 1fr; }
  .page-layout { grid-template-columns: 1fr; }
  .page-sidebar { display: none; }
}
@media (max-width: 768px) {
  .section { padding: 50px 0; }
  .main-nav { display: none; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(12,13,20,0.98);
    padding: 20px;
    border-bottom: 1px solid var(--border);
    z-index: 999;
    gap: 4px;
  }
  .nav-toggle { display: flex; }
  .header-search { display: none; }
  .video-grid-4,
  .video-grid-3,
  .video-grid-5 { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .content-modules { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: repeat(2, 1fr); }
  .experts-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .ai-features { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-section { min-height: 420px; }
  .hero-stats { gap: 20px; }
  .ai-section { padding: 30px 20px; }
  .contact-section { padding: 30px 20px; }
  .feature-card-overlay { padding: 20px; }
  .feature-card-content h3 { font-size: 18px; }
}
@media (max-width: 480px) {
  .video-grid,
  .video-grid-4,
  .video-grid-3,
  .video-grid-5 { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .hero-actions { flex-direction: column; }
  .section-header { flex-direction: column; align-items: flex-start; }
}