/* ============================================
   51传媒 - 主样式文件
   Brand: 51 | Domain: y69c3y.cn
   ============================================ */

/* ---- CSS变量 ---- */
:root {
  --primary: #e91e8c;
  --primary-dark: #c0166e;
  --secondary: #7c3aed;
  --accent: #06b6d4;
  --accent2: #f59e0b;
  --bg-dark: #0f0a1e;
  --bg-card: #1a1035;
  --bg-card2: #1e1540;
  --text-primary: #f0e6ff;
  --text-secondary: #b8a8d0;
  --text-muted: #7a6a90;
  --border: rgba(124,58,237,0.25);
  --gradient-main: linear-gradient(135deg, #e91e8c 0%, #7c3aed 50%, #06b6d4 100%);
  --gradient-card: linear-gradient(145deg, #1a1035 0%, #1e1540 100%);
  --shadow-glow: 0 0 20px rgba(233,30,140,0.3);
  --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s ease;
}

/* ---- 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-dark);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; outline: none; }

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

/* ============================================
   顶部公告条
   ============================================ */
.top-bar {
  background: var(--gradient-main);
  color: #fff;
  text-align: center;
  padding: 8px 20px;
  font-size: 13px;
  letter-spacing: 0.5px;
}
.top-bar a { color: #fff; text-decoration: underline; margin-left: 8px; }

/* ============================================
   头部导航
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15,10,30,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 20px rgba(0,0,0,0.5);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
  height: 70px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.xo78tdn {
  width: 42px;
  height: 42px;
  background: var(--gradient-main);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 900;
  color: #fff;
  box-shadow: var(--shadow-glow);
}
.xwtdksjpn { display: flex; flex-direction: column; line-height: 1.2; }
.xwtdksjpn .brand { font-size: 20px; font-weight: 800; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.xwtdksjpn .tagline { font-size: 11px; color: var(--text-muted); letter-spacing: 1px; }

/* 主导航 */
.main-nav { flex: 1; }
.main-nav ul { display: flex; gap: 4px; align-items: center; }
.main-nav a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--primary);
  background: rgba(233,30,140,0.1);
}

/* 搜索框 */
.header-search {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 0 16px;
  gap: 8px;
  height: 38px;
  min-width: 200px;
  transition: var(--transition);
}
.header-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(233,30,140,0.15);
}
.header-search input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 13px;
  width: 100%;
}
.header-search input::placeholder { color: var(--text-muted); }
.search-btn {
  background: none;
  color: var(--text-muted);
  font-size: 15px;
  padding: 0;
  transition: var(--transition);
}
.search-btn:hover { color: var(--primary); }

/* 汉堡菜单 */
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: var(--transition); }

/* ============================================
   面包屑
   ============================================ */
.breadcrumb {
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
}
.breadcrumb-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.breadcrumb-inner a { color: var(--text-muted); }
.breadcrumb-inner a:hover { color: var(--primary); }
.breadcrumb-inner .sep { opacity: 0.5; }
.breadcrumb-inner .current { color: var(--text-secondary); }

/* ============================================
   Hero Banner
   ============================================ */
.hero {
  position: relative;
  min-height: 600px;
  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(0.4);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,10,30,0.85) 0%, rgba(124,58,237,0.3) 50%, rgba(15,10,30,0.7) 100%);
}
.x0hjo7zo {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(233,30,140,0.15);
  border: 1px solid rgba(233,30,140,0.4);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 13px;
  color: var(--primary);
  margin-bottom: 20px;
}
.hero-badge::before { content: '●'; font-size: 8px; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.3} }
.hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
}
.hero h1 .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;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-main);
  color: #fff;
  padding: 14px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  box-shadow: var(--shadow-glow);
  transition: var(--transition);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 30px rgba(233,30,140,0.5); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-primary);
  padding: 14px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: rgba(233,30,140,0.08); }
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 40px;
}
.stat-item { text-align: center; }
.x5vfyf { font-size: 28px; font-weight: 800; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-label { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.xcxh10nw { position: relative; }
.hero-img-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
}
.hero-img-wrap img { width: 100%; }
.hero-float-card {
  position: absolute;
  background: rgba(26,16,53,0.9);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 13px;
}
.hero-float-card.card-live {
  top: 20px; right: -20px;
  display: flex; align-items: center; gap: 8px;
}
.live-dot { width: 8px; height: 8px; background: #ef4444; border-radius: 50%; animation: pulse 1.5s infinite; }
.hero-float-card.card-views { bottom: 30px; left: -20px; }
.views-num { font-size: 20px; font-weight: 800; color: var(--accent); }

/* ============================================
   通用区块
   ============================================ */
.section { padding: 80px 0; }
.xc25ve { background: rgba(255,255,255,0.02); }
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.section-header { text-align: center; margin-bottom: 56px; }
.xz5vhjzk {
  display: inline-block;
  background: rgba(233,30,140,0.12);
  color: var(--primary);
  border: 1px solid rgba(233,30,140,0.3);
  border-radius: 20px;
  padding: 4px 16px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}
.section-title .accent { background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.section-desc { color: var(--text-secondary); font-size: 16px; max-width: 600px; margin: 0 auto; }

/* ============================================
   视频卡片
   ============================================ */
.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.video-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-card); border-color: var(--primary); }
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #0d0820;
}
.video-thumb img,.video-thumb .video-cover { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; position: absolute; inset: 0; }
.video-card:hover .video-thumb img,.video-card:hover .video-thumb .video-cover { transform: scale(1.05); }
.video-thumb .video-player { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.video-play-btn { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%) scale(0.8); z-index: 3; background: none; border: none; cursor: pointer; opacity: 0; transition: opacity 0.3s, transform 0.3s; padding: 0; }
.video-card:hover .video-play-btn { opacity: 1; transform: translate(-50%,-50%) scale(1); }
/* video-play-btn 样式已在上方定义 */
.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(233,30,140,0.6);
  transform: scale(0.8);
  transition: transform 0.3s ease;
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
}
.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 4px;
  font-weight: 600;
}
.video-info { padding: 16px; }
.video-title { font-size: 14px; font-weight: 600; margin-bottom: 8px; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.video-meta { display: flex; align-items: center; gap: 12px; font-size: 12px; color: var(--text-muted); }
.video-meta span { display: flex; align-items: center; gap: 4px; }

/* ============================================
   功能卡片
   ============================================ */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 24px; }
.xta3kbdu {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.xta3kbdu::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-main);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}
.xta3kbdu:hover::before { transform: scaleX(1); }
.xta3kbdu:hover { transform: translateY(-4px); box-shadow: var(--shadow-card); border-color: rgba(233,30,140,0.4); }
.feature-icon {
  width: 52px;
  height: 52px;
  background: rgba(233,30,140,0.12);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
}
.xta3kbdu h3 { font-size: 16px; font-weight: 700; margin-bottom: 10px; }
.xta3kbdu p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }

/* ============================================
   专家卡片
   ============================================ */
.expert-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 28px; }
.expert-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.expert-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-card); border-color: var(--secondary); }
.expert-img {
  position: relative;
  height: 240px;
  overflow: hidden;
}
.expert-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.expert-card:hover .expert-img img { transform: scale(1.05); }
.expert-badge {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
}
.expert-info { padding: 20px; }
.expert-name { font-size: 18px; font-weight: 800; margin-bottom: 4px; }
.expert-title { font-size: 13px; color: var(--primary); margin-bottom: 12px; }
.expert-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.expert-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.expert-tag { background: rgba(124,58,237,0.15); color: var(--secondary); border: 1px solid rgba(124,58,237,0.3); border-radius: 12px; padding: 3px 10px; font-size: 11px; }
.expert-actions { display: flex; gap: 10px; }
.btn-sm {
  flex: 1;
  text-align: center;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-sm-primary { background: var(--gradient-main); color: #fff; }
.btn-sm-outline { border: 1px solid var(--border); color: var(--text-secondary); }
.btn-sm-outline:hover { border-color: var(--primary); color: var(--primary); }

/* ============================================
   合作品牌Logo墙
   ============================================ */
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  align-items: center;
}
.xpamidil {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 28px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-muted);
  transition: var(--transition);
  min-width: 120px;
  text-align: center;
}
.xpamidil:hover { border-color: var(--primary); color: var(--primary); background: rgba(233,30,140,0.08); }

/* ============================================
   用户评价
   ============================================ */
.reviews-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; }
.review-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: var(--transition);
}
.review-card:hover { border-color: var(--secondary); transform: translateY(-3px); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.reviewer-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: 800;
  color: #fff;
  flex-shrink: 0;
}
.reviewer-info .name { font-size: 14px; font-weight: 700; }
.reviewer-info .date { font-size: 12px; color: var(--text-muted); }
.review-stars { color: var(--accent2); font-size: 14px; margin-bottom: 12px; }
.review-text { font-size: 14px; color: var(--text-secondary); line-height: 1.8; }
.review-tag { display: inline-block; margin-top: 12px; background: rgba(6,182,212,0.1); color: var(--accent); border: 1px solid rgba(6,182,212,0.3); border-radius: 12px; padding: 2px 10px; font-size: 11px; }

/* ============================================
   FAQ
   ============================================ */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.faq-question {
  width: 100%;
  background: none;
  color: var(--text-primary);
  text-align: left;
  padding: 18px 24px;
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: var(--transition);
}
.faq-question:hover { color: var(--primary); }
.faq-icon { font-size: 20px; flex-shrink: 0; transition: transform 0.3s ease; color: var(--primary); }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 18px; }

/* ============================================
   联系我们
   ============================================ */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.contact-card h3 { font-size: 20px; font-weight: 800; margin-bottom: 20px; display: flex; align-items: center; gap: 10px; }
.contact-info-list { display: flex; flex-direction: column; gap: 14px; }
.contact-info-item { display: flex; align-items: flex-start; gap: 12px; font-size: 14px; }
.contact-info-item .icon { font-size: 18px; flex-shrink: 0; margin-top: 1px; }
.contact-info-item .label { color: var(--text-muted); font-size: 12px; }
.contact-info-item .value { color: var(--text-primary); font-weight: 500; }
.qr-grid { display: flex; gap: 20px; flex-wrap: wrap; }
.qr-item { text-align: center; }
.qr-box {
  width: 100px;
  height: 100px;
  background: #fff;
  border-radius: 10px;
  margin: 0 auto 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.qr-box img { width: 100%; height: 100%; object-fit: contain; }
.qr-label { font-size: 12px; color: var(--text-muted); }

/* ============================================
   社交分享
   ============================================ */
.xncigo1b {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.xochsc { font-size: 14px; color: var(--text-muted); }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}
.share-btn:hover { transform: translateY(-2px); }
.share-btn.wechat:hover { border-color: #07c160; color: #07c160; background: rgba(7,193,96,0.1); }
.share-btn.weibo:hover { border-color: #e6162d; color: #e6162d; background: rgba(230,22,45,0.1); }
.share-btn.douyin:hover { border-color: #fe2c55; color: #fe2c55; background: rgba(254,44,85,0.1); }
.share-btn.bilibili:hover { border-color: #00a1d6; color: #00a1d6; background: rgba(0,161,214,0.1); }

/* ============================================
   底部Footer
   ============================================ */
.site-footer {
  background: #080514;
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}
.xpo3o08ki {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.xqkjy09pu .xwtdksjpn .brand { font-size: 24px; }
.xqkjy09pu p { font-size: 13px; color: var(--text-muted); line-height: 1.8; margin: 16px 0; }
.xcnvu8fq { display: flex; gap: 10px; }
.x3fwqpu7 {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: var(--transition);
}
.x3fwqpu7:hover { background: var(--primary); border-color: var(--primary); }
.xaoj8tlkb h4 { font-size: 14px; font-weight: 700; margin-bottom: 16px; color: var(--text-primary); }
.xaoj8tlkb ul { display: flex; flex-direction: column; gap: 10px; }
.xaoj8tlkb a { font-size: 13px; color: var(--text-muted); transition: var(--transition); }
.xaoj8tlkb a:hover { color: var(--primary); padding-left: 4px; }
.xe2brljlq {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: var(--text-muted);
}
.xe2brljlq a { color: var(--text-muted); }
.xe2brljlq a:hover { color: var(--primary); }

/* ============================================
   内页 Hero
   ============================================ */
.xjqbwafhp {
  padding: 60px 0;
  background: linear-gradient(135deg, rgba(233,30,140,0.1) 0%, rgba(124,58,237,0.1) 100%);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.xjqbwafhp h1 { font-size: clamp(1.8rem, 3vw, 2.8rem); font-weight: 900; margin-bottom: 12px; }
.xjqbwafhp p { font-size: 16px; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

/* ============================================
   标签页
   ============================================ */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 32px; overflow-x: auto; }
.tab-btn {
  padding: 12px 20px;
  background: none;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  white-space: nowrap;
  transition: var(--transition);
}
.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }

/* ============================================
   加入社区引导
   ============================================ */
.join-steps { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 24px; }
.step-card {
  text-align: center;
  padding: 28px 20px;
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
}
.step-num {
  width: 40px;
  height: 40px;
  background: var(--gradient-main);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 800;
  color: #fff;
  margin: 0 auto 16px;
}
.step-card h4 { font-size: 15px; font-weight: 700; margin-bottom: 8px; }
.step-card p { font-size: 13px; color: var(--text-secondary); }

/* ============================================
   CTA区块
   ============================================ */
.cta-section {
  background: linear-gradient(135deg, rgba(233,30,140,0.15) 0%, rgba(124,58,237,0.15) 100%);
  border: 1px solid rgba(233,30,140,0.2);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
}
.cta-section h2 { font-size: 2rem; font-weight: 800; margin-bottom: 16px; }
.cta-section p { color: var(--text-secondary); font-size: 16px; margin-bottom: 32px; }

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1024px) {
  .xpo3o08ki { grid-template-columns: 1fr 1fr; }
  .x0hjo7zo { grid-template-columns: 1fr; gap: 40px; }
  .xcxh10nw { display: none; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .main-nav { display: none; }
  .main-nav.open { display: flex; flex-direction: column; position: absolute; top: 70px; left: 0; right: 0; background: rgba(15,10,30,0.98); padding: 16px; border-bottom: 1px solid var(--border); }
  .main-nav.open ul { flex-direction: column; gap: 4px; }
  .hamburger { display: flex; }
  .header-search { display: none; }
  .hero { min-height: 480px; }
  .x0hjo7zo { padding: 60px 24px; }
  .hero-stats { gap: 20px; }
  .xpo3o08ki { grid-template-columns: 1fr; gap: 28px; }
  .xe2brljlq { flex-direction: column; text-align: center; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .section { padding: 56px 0; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
  .video-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
}

/* ============================================
   动画
   ============================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeInUp 0.6s ease forwards; }
.fade-in-delay-1 { animation-delay: 0.1s; opacity: 0; animation-fill-mode: forwards; animation-name: fadeInUp; animation-duration: 0.6s; }
.fade-in-delay-2 { animation-delay: 0.2s; opacity: 0; animation-fill-mode: forwards; animation-name: fadeInUp; animation-duration: 0.6s; }
.fade-in-delay-3 { animation-delay: 0.3s; opacity: 0; animation-fill-mode: forwards; animation-name: fadeInUp; animation-duration: 0.6s; }

/* 懒加载占位 */
img[data-src] { background: var(--bg-card); min-height: 100px; }

/* ============================================
   工具类
   ============================================ */
.text-center { text-align: center; }
.x1lcg1tdk { background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-32 { margin-bottom: 32px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.divider { height: 1px; background: var(--border); margin: 40px 0; }

/* 搜索结果提示 */
.search-tip {
  position: absolute;
  top: calc(100% + 8px);
  left: 0; right: 0;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--text-muted);
  display: none;
  z-index: 100;
  box-shadow: var(--shadow-card);
}
.header-search-wrap { position: relative; }
.header-search:focus-within + .search-tip { display: block; }