/* 精东 视频传媒 - 全站样式 vbhko.cn */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;color:#e0e0e0;background:#0a0a0f;line-height:1.8;overflow-x:hidden}
a{color:#e53935;text-decoration:none;transition:color .3s}
a:hover{color:#ff6659}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* 头部导航 */
.site-header{background:rgba(10,10,15,.97);position:fixed;top:0;left:0;width:100%;z-index:999;border-bottom:1px solid #1a1a2e;backdrop-filter:blur(10px)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;max-width:1200px;margin:0 auto}
.logo-link{display:flex;align-items:center;gap:10px}
.logo-link img{height:50px;width:auto}
.logo-text{font-size:20px;font-weight:700;color:#fff}
.logo-text span{color:#e53935}
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{padding:12px 14px;font-size:14px;color:#ccc;transition:all .3s;position:relative}
.main-nav a:hover,.main-nav a.active{color:#e53935}
.main-nav a::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:2px;background:#e53935;transition:width .3s}
.main-nav a:hover::after,.main-nav a.active::after{width:60%}
.mobile-toggle{display:none;font-size:24px;color:#fff;cursor:pointer;background:none;border:none}

/* 搜索框 */
.search-bar{background:#111118;padding:12px 0;border-bottom:1px solid #1a1a2e}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;max-width:600px;width:100%}
.search-box input{flex:1;padding:10px 16px;border:1px solid #333;border-right:none;border-radius:4px 0 0 4px;background:#1a1a2e;color:#fff;font-size:14px;outline:none}
.search-box input:focus{border-color:#e53935}
.search-box button{padding:10px 24px;background:#e53935;color:#fff;border:none;border-radius:0 4px 4px 0;cursor:pointer;font-size:14px;transition:background .3s}
.search-box button:hover{background:#c62828}

/* Banner */
.hero-banner{position:relative;height:500px;overflow:hidden;margin-top:71px}
.hero-banner img{width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(to bottom,rgba(10,10,15,.3),rgba(10,10,15,.85));display:flex;align-items:center;justify-content:center}
.hero-content{text-align:center;padding:20px;max-width:800px}
.hero-content h1{font-size:42px;color:#fff;margin-bottom:16px;text-shadow:2px 2px 8px rgba(0,0,0,.8)}
.hero-content h1 span{color:#e53935}
.hero-content p{font-size:18px;color:#ccc;margin-bottom:24px;line-height:1.8}
.hero-content .btn-group{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{display:inline-block;padding:12px 32px;background:#e53935;color:#fff;border-radius:4px;font-size:16px;font-weight:600;transition:all .3s;border:2px solid #e53935}
.btn-primary:hover{background:transparent;color:#e53935}
.btn-outline{display:inline-block;padding:12px 32px;background:transparent;color:#fff;border:2px solid #fff;border-radius:4px;font-size:16px;font-weight:600;transition:all .3s}
.btn-outline:hover{background:#fff;color:#0a0a0f}

/* 通用区块 */
.section{padding:60px 0}
.section-dark{background:#0d0d14}
.section-alt{background:#111118}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:32px;color:#fff;margin-bottom:10px}
.section-title h2 span{color:#e53935}
.section-title p{color:#999;font-size:16px}
.section-title .breadcrumb{font-size:13px;color:#666;margin-top:8px}
.section-title .breadcrumb a{color:#999}

/* 视频卡片网格 */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:#151520;border-radius:8px;overflow:hidden;transition:transform .3s,box-shadow .3s;cursor:pointer;position:relative}
.video-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(229,57,53,.15)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#1a1a2e}
.video-thumb img,.video-thumb video{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb img,.video-card:hover .video-thumb video{transform:scale(1.05)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;background:rgba(229,57,53,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;z-index:3}
.play-btn::after{content:'';border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:4px}
.video-card:hover .play-btn{opacity:1}
.video-info{padding:14px 16px}
.video-info h3{font-size:15px;color:#fff;margin-bottom:6px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:12px;font-size:12px;color:#888}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tag{display:inline-block;padding:2px 8px;background:#e53935;color:#fff;font-size:11px;border-radius:3px;position:absolute;top:10px;left:10px;z-index:2}
.video-duration{position:absolute;bottom:10px;right:10px;background:rgba(0,0,0,.8);color:#fff;font-size:11px;padding:2px 6px;border-radius:3px;z-index:2}
.video-author{font-size:12px;color:#888;margin-bottom:6px;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.author-tag{display:inline-block;padding:1px 6px;background:rgba(229,57,53,.15);color:#e53935;font-size:11px;border-radius:3px;border:1px solid rgba(229,57,53,.3)}

/* 分类标签栏 */
.tab-bar{display:flex;gap:12px;justify-content:center;margin-bottom:30px;flex-wrap:wrap}
.tab-bar a{padding:8px 20px;background:#1a1a2e;color:#ccc;border-radius:20px;font-size:14px;transition:all .3s}
.tab-bar a:hover,.tab-bar a.active{background:#e53935;color:#fff}

/* 专家/团队卡片 */
.team-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.team-card{background:#151520;border-radius:8px;padding:24px;text-align:center;transition:transform .3s;border:1px solid #1a1a2e}
.team-card:hover{transform:translateY(-4px);border-color:#e53935}
.team-card img{width:120px;height:120px;border-radius:50%;margin:0 auto 16px;object-fit:cover;border:3px solid #e53935}
.team-card h4{color:#fff;font-size:18px;margin-bottom:4px}
.team-card .role{color:#e53935;font-size:14px;margin-bottom:10px}
.team-card p{color:#999;font-size:13px;line-height:1.6;margin-bottom:12px;text-align:left}
.team-card .social-links{display:flex;gap:10px;justify-content:center}
.team-card .social-links a{color:#888;font-size:14px;transition:color .3s}
.team-card .social-links a:hover{color:#e53935}
.team-actions{display:flex;gap:8px;justify-content:center;margin-top:12px}
.team-actions a{padding:6px 14px;font-size:12px;border:1px solid #e53935;color:#e53935;border-radius:4px;transition:all .3s}
.team-actions a:hover{background:#e53935;color:#fff}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid #222;padding:16px 0}
.faq-question{display:flex;justify-content:space-between;align-items:center;cursor:pointer;color:#fff;font-size:16px;font-weight:600}
.faq-question::after{content:'+';font-size:24px;color:#e53935;transition:transform .3s}
.faq-item.active .faq-question::after{content:'-';transform:rotate(180deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease;color:#999;font-size:14px;line-height:1.8}
.faq-item.active .faq-answer{max-height:300px;padding-top:12px}

/* 用户评论 */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.review-card{background:#151520;border-radius:8px;padding:24px;position:relative}
.review-card::before{content:'\201C';font-size:60px;color:#e53935;opacity:.3;position:absolute;top:10px;left:16px;line-height:1}
.review-card .stars{color:#ffc107;font-size:14px;margin-bottom:10px}
.review-card p{color:#ccc;font-size:14px;line-height:1.8;margin-bottom:12px;padding-top:20px}
.review-card .reviewer{display:flex;align-items:center;gap:10px}
.review-card .reviewer-avatar{width:40px;height:40px;border-radius:50%;background:#e53935;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:16px}
.review-card .reviewer-info{font-size:13px}
.review-card .reviewer-info strong{color:#fff;display:block}
.review-card .reviewer-info span{color:#888}

/* 合作品牌墙 */
.brand-wall{display:flex;flex-wrap:wrap;gap:24px;justify-content:center;align-items:center}
.brand-wall .brand-item{background:#1a1a2e;padding:16px 28px;border-radius:8px;color:#888;font-size:16px;font-weight:600;transition:all .3s;border:1px solid #222}
.brand-wall .brand-item:hover{border-color:#e53935;color:#e53935}

/* AI赋能区块 */
.ai-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.ai-card{background:#151520;border-radius:8px;padding:28px;text-align:center;border:1px solid #1a1a2e;transition:all .3s}
.ai-card:hover{border-color:#e53935;transform:translateY(-4px)}
.ai-card .ai-icon{font-size:40px;margin-bottom:16px}
.ai-card h4{color:#fff;font-size:18px;margin-bottom:8px}
.ai-card p{color:#999;font-size:14px;line-height:1.7}

/* 社区模块 */
.community-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}
.community-card{background:#151520;border-radius:8px;overflow:hidden;transition:transform .3s}
.community-card:hover{transform:translateY(-3px)}
.community-card .card-img{height:160px;overflow:hidden}
.community-card .card-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.community-card:hover .card-img img{transform:scale(1.05)}
.community-card .card-body{padding:14px}
.community-card .card-body h4{color:#fff;font-size:15px;margin-bottom:6px}
.community-card .card-body p{color:#888;font-size:13px;line-height:1.6}
.community-card .card-tags{padding:0 14px 14px;display:flex;gap:6px;flex-wrap:wrap}
.community-card .card-tags span{padding:2px 8px;background:#1a1a2e;color:#888;font-size:11px;border-radius:3px}

/* 联系我们 */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.contact-card{background:#151520;border-radius:8px;padding:24px;text-align:center}
.contact-card h4{color:#fff;font-size:18px;margin-bottom:12px}
.contact-card p{color:#999;font-size:14px;line-height:1.8}
.contact-card img{max-width:180px;margin:12px auto}

/* How-To指南 */
.howto-steps{max-width:700px;margin:0 auto}
.howto-step{display:flex;gap:20px;margin-bottom:24px;align-items:flex-start}
.step-num{width:48px;height:48px;min-width:48px;background:#e53935;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px;font-weight:700}
.step-content h4{color:#fff;font-size:16px;margin-bottom:4px}
.step-content p{color:#999;font-size:14px}

/* 社交分享 */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-btn{padding:10px 20px;border-radius:4px;color:#fff;font-size:14px;transition:opacity .3s;cursor:pointer;border:none}
.share-btn:hover{opacity:.85}
.share-wechat{background:#07c160}
.share-weibo{background:#e6162d}
.share-douyin{background:#161823}
.share-bilibili{background:#00a1d6}

/* 返回顶部 */
.back-to-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;background:#e53935;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:18px;opacity:0;visibility:hidden;transition:all .3s;z-index:998;text-decoration:none;box-shadow:0 4px 12px rgba(229,57,53,.4)}
.back-to-top.show{opacity:1;visibility:visible}
.back-to-top:hover{background:#c62828;color:#fff;transform:translateY(-3px)}

/* 页脚 */
.site-footer{background:#08080d;border-top:1px solid #1a1a2e;padding:40px 0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;margin-bottom:30px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:14px;position:relative;padding-bottom:8px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:#e53935}
.footer-col p,.footer-col a{color:#888;font-size:13px;line-height:2}
.footer-col a:hover{color:#e53935}
.footer-col ul{list-style:none}
.footer-col ul li a{display:block}
.footer-qr{display:flex;gap:20px;justify-content:center;margin:20px 0}
.footer-qr .qr-item{text-align:center}
.footer-qr .qr-item img{width:120px;height:120px;border-radius:4px;margin-bottom:6px}
.footer-qr .qr-item p{color:#888;font-size:12px}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid #1a1a2e;color:#666;font-size:13px}
.footer-bottom p{margin:4px 0}
.footer-bottom a{color:#888}
.footer-bottom a:hover{color:#e53935}

/* 面包屑 */
.breadcrumb-nav{padding:12px 0;font-size:13px;color:#666}
.breadcrumb-nav a{color:#999}
.breadcrumb-nav a:hover{color:#e53935}

/* 内页通用 */
.page-hero{padding:100px 0 40px;text-align:center;background:linear-gradient(135deg,#0d0d14,#1a1a2e)}
.page-hero h1{font-size:36px;color:#fff;margin-bottom:10px}
.page-hero h1 span{color:#e53935}
.page-hero p{color:#999;font-size:16px}
.content-section{padding:40px 0}
.content-section h2,.content-section h3{color:#fff;margin-bottom:16px}
.content-section h2 span,.content-section h3 span{color:#e53935}
.content-section p{color:#ccc;font-size:15px;line-height:1.9;margin-bottom:16px}
.content-section ul{color:#ccc;padding-left:20px;margin-bottom:16px}
.content-section ul li{margin-bottom:8px;font-size:14px}

/* 数据统计 */
.stats-bar{display:flex;justify-content:center;gap:40px;flex-wrap:wrap;padding:30px 0}
.stat-item{text-align:center}
.stat-item .num{font-size:36px;font-weight:700;color:#e53935}
.stat-item .label{font-size:14px;color:#999;margin-top:4px}

/* 隐私政策页 */
.privacy-content{max-width:800px;margin:0 auto;padding:40px 20px}
.privacy-content h2{color:#fff;font-size:24px;margin:30px 0 12px;border-left:3px solid #e53935;padding-left:12px}
.privacy-content h3{color:#ddd;font-size:18px;margin:20px 0 10px}
.privacy-content p{color:#ccc;font-size:14px;line-height:1.9;margin-bottom:12px}
.privacy-content ul{color:#ccc;padding-left:20px;margin-bottom:16px}
.privacy-content ul li{margin-bottom:6px;font-size:14px}

/* 响应式 */
@media(max-width:768px){
  .header-inner{flex-wrap:wrap}
  .main-nav{display:none;width:100%;flex-direction:column;padding:10px 0}
  .main-nav.show{display:flex}
  .main-nav a{padding:10px 0;border-bottom:1px solid #1a1a2e}
  .mobile-toggle{display:block}
  .hero-banner{height:350px;margin-top:71px}
  .hero-content h1{font-size:26px}
  .hero-content p{font-size:14px}
  .section-title h2{font-size:24px}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
  .stats-bar{gap:20px}
  .stat-item .num{font-size:28px}
  .footer-grid{grid-template-columns:1fr}
  .page-hero{padding:80px 0 30px}
  .page-hero h1{font-size:28px}
  .team-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
  .back-to-top{bottom:20px;right:20px;width:38px;height:38px;font-size:14px}
}
@media(max-width:480px){
  .hero-banner{height:280px}
  .hero-content h1{font-size:22px}
  .video-grid{grid-template-columns:1fr}
  .btn-group{flex-direction:column;align-items:center}
  .team-grid{grid-template-columns:1fr}
}