/* 91暗网 视频传媒 - 修车改装视频社区 全站样式 */
/* Reset & Base */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;color:#e0e0e0;background:#0a0a0a;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}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3;color:#fff}
h1{font-size:2.4rem}
h2{font-size:2rem}
h3{font-size:1.6rem}
h4{font-size:1.3rem}
h5{font-size:1.1rem}
h6{font-size:1rem}
p{margin-bottom:1rem;color:#ccc}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Header / Navigation */
.site-header{background:rgba(10,10,10,.97);position:sticky;top:0;z-index:1000;border-bottom:1px solid #222;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-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{height:45px;width:auto}
.logo-wrap span{font-size:1.4rem;font-weight:800;color:#fff;letter-spacing:1px}
.main-nav ul{display:flex;gap:5px}
.main-nav a{display:block;padding:10px 16px;color:#ccc;font-size:.95rem;border-radius:6px;transition:all .3s}
.main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(229,57,53,.15)}
.mobile-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* Search Bar */
.search-bar{background:#111;padding:12px 0;border-bottom:1px solid #1a1a1a}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;max-width:600px;width:100%;background:#1a1a1a;border:1px solid #333;border-radius:25px;overflow:hidden}
.search-box input{flex:1;padding:10px 20px;background:transparent;border:none;color:#fff;font-size:.95rem;outline:none}
.search-box input::placeholder{color:#666}
.search-box button{padding:10px 24px;background:#e53935;color:#fff;border:none;cursor:pointer;font-size:.95rem;transition:background .3s}
.search-box button:hover{background:#c62828}

/* Banner / Hero */
.hero-banner{position:relative;height:520px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hero-banner .bg-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:brightness(.45)}
.hero-content{position:relative;z-index:2;text-align:center;max-width:800px;padding:0 20px}
.hero-content h1{font-size:2.8rem;margin-bottom:16px;text-shadow:0 2px 20px rgba(0,0,0,.7)}
.hero-content h1 .brand{color:#e53935}
.hero-content p{font-size:1.15rem;color:#ddd;margin-bottom:24px}
.hero-content .hero-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.hero-tags span{padding:6px 16px;background:rgba(229,57,53,.2);border:1px solid rgba(229,57,53,.4);border-radius:20px;font-size:.85rem;color:#ff8a80}

/* Breadcrumb */
.breadcrumb{padding:12px 0;font-size:.85rem;color:#888}
.breadcrumb a{color:#aaa}
.breadcrumb a:hover{color:#e53935}
.breadcrumb span{margin:0 8px;color:#555}

/* Section Common */
.section{padding:60px 0}
.section-dark{background:#0d0d0d}
.section-darker{background:#080808}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{margin-bottom:10px}
.section-title h2 .brand{color:#e53935}
.section-title p{color:#999;font-size:1rem}
.section-title .line{width:60px;height:3px;background:#e53935;margin:12px auto 0}

/* Video Card Grid */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.video-card{background:#151515;border-radius:10px;overflow:hidden;transition:transform .3s,box-shadow .3s;cursor:pointer;position:relative}
.video-card:hover{transform:translateY(-5px);box-shadow:0 10px 30px rgba(229,57,53,.15)}
.video-thumb{position:relative;overflow:hidden;aspect-ratio:16/9}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb img{transform:scale(1.05)}
.play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.4);opacity:0;transition:opacity .3s}
.video-card:hover .play-btn{opacity:1}
.play-btn i{width:60px;height:60px;background:rgba(229,57,53,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0}
.play-btn i::after{content:'';display:block;width:0;height:0;border-style:solid;border-width:12px 0 12px 20px;border-color:transparent transparent transparent #fff;margin-left:4px}
.video-info{padding:14px}
.video-info h4{font-size:.95rem;margin-bottom:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.video-info .meta{display:flex;gap:12px;font-size:.8rem;color:#888}
.video-info .meta span{display:flex;align-items:center;gap:4px}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.8);color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem}
.video-tags{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.video-tags span{padding:2px 10px;background:rgba(229,57,53,.1);border-radius:12px;font-size:.75rem;color:#ff8a80}

/* Expert / Team Cards */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:#151515;border-radius:12px;padding:24px;text-align:center;transition:transform .3s}
.expert-card:hover{transform:translateY(-5px)}
.expert-card img{width:120px;height:120px;border-radius:50%;object-fit:cover;margin:0 auto 16px;border:3px solid #e53935}
.expert-card h4{margin-bottom:4px}
.expert-card .role{color:#e53935;font-size:.85rem;margin-bottom:10px}
.expert-card p{font-size:.85rem;color:#999}
.expert-card .social-links{display:flex;justify-content:center;gap:10px;margin-top:12px}
.expert-card .social-links a{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;background:#222;border-radius:50%;color:#ccc;font-size:.8rem;transition:all .3s}
.expert-card .social-links a:hover{background:#e53935;color:#fff}
.expert-card .btn-sm{display:inline-block;margin-top:12px;padding:6px 18px;background:#e53935;color:#fff;border-radius:20px;font-size:.85rem;transition:background .3s}
.expert-card .btn-sm:hover{background:#c62828}

/* FAQ Section */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#151515;border-radius:10px;margin-bottom:12px;overflow:hidden;border:1px solid #222}
.faq-item .faq-q{padding:16px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:#fff;transition:background .3s}
.faq-item .faq-q:hover{background:#1a1a1a}
.faq-item .faq-q .arrow{transition:transform .3s;color:#e53935;font-size:1.2rem}
.faq-item.active .faq-q .arrow{transform:rotate(180deg)}
.faq-item .faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:all .3s;color:#aaa;font-size:.95rem}
.faq-item.active .faq-a{padding:0 20px 16px;max-height:500px}

/* Reviews */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.review-card{background:#151515;border-radius:10px;padding:24px;border:1px solid #222}
.review-card .stars{color:#ffc107;margin-bottom:10px;font-size:1.1rem}
.review-card .review-text{font-size:.95rem;color:#ccc;margin-bottom:12px;font-style:italic}
.review-card .reviewer{display:flex;align-items:center;gap:10px}
.review-card .reviewer .avatar{width:40px;height:40px;border-radius:50%;background:#333;display:flex;align-items:center;justify-content:center;color:#e53935;font-weight:700;font-size:1rem}
.review-card .reviewer .name{font-weight:600;color:#fff;font-size:.9rem}
.review-card .reviewer .date{font-size:.8rem;color:#666}

/* Partner Logos */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-wall .partner-item{background:#151515;padding:16px 30px;border-radius:8px;color:#888;font-size:1rem;font-weight:600;border:1px solid #222;transition:all .3s}
.partner-wall .partner-item:hover{border-color:#e53935;color:#fff}

/* How-To Guide */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:30px}
.howto-step{background:#151515;border-radius:10px;padding:24px;text-align:center;border:1px solid #222}
.howto-step .step-num{width:50px;height:50px;border-radius:50%;background:#e53935;color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.4rem;font-weight:700;margin:0 auto 16px}
.howto-step h4{margin-bottom:8px}
.howto-step p{font-size:.9rem;color:#999}

/* Contact Section */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.contact-card{background:#151515;border-radius:12px;padding:30px;border:1px solid #222}
.contact-card h3{margin-bottom:16px;color:#e53935}
.contact-info-item{display:flex;align-items:flex-start;gap:12px;margin-bottom:14px}
.contact-info-item .icon{width:36px;height:36px;background:#222;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#e53935;flex-shrink:0;font-size:.9rem}
.contact-info-item .text{font-size:.9rem;color:#ccc}
.contact-info-item .text strong{color:#fff;display:block;margin-bottom:2px}

/* AI Section */
.ai-features{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.ai-card{background:#151515;border-radius:10px;padding:24px;border:1px solid #222;transition:all .3s}
.ai-card:hover{border-color:#e53935;transform:translateY(-3px)}
.ai-card .ai-icon{width:50px;height:50px;background:rgba(229,57,53,.15);border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-size:1.5rem;color:#e53935}
.ai-card h4{margin-bottom:8px}
.ai-card p{font-size:.9rem;color:#999}

/* Share Buttons */
.share-bar{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:20px;font-size:.85rem;color:#fff;transition:all .3s;border:1px solid #333;background:#1a1a1a}
.share-btn:hover{background:#e53935;border-color:#e53935;color:#fff}

/* Footer */
.site-footer{background:#050505;border-top:1px solid #1a1a1a;padding:40px 0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-bottom:30px}
.footer-col h4{color:#fff;margin-bottom:16px;font-size:1rem}
.footer-col a{display:block;color:#888;font-size:.9rem;padding:4px 0;transition:color .3s}
.footer-col a:hover{color:#e53935}
.footer-col p{font-size:.85rem;color:#888}
.footer-qr{display:flex;gap:20px;margin-top:12px}
.footer-qr img{width:100px;height:100px;border-radius:8px}
.footer-qr .qr-label{font-size:.75rem;color:#666;text-align:center;margin-top:4px}
.footer-bottom{border-top:1px solid #1a1a1a;padding-top:20px;text-align:center;font-size:.85rem;color:#666}
.footer-bottom .update-time{margin-top:6px;color:#555}

/* MCP Placeholder */
.mcp-widget{background:#111;border:1px solid #222;border-radius:8px;padding:20px;margin-top:20px;text-align:center;color:#666;font-size:.85rem}

/* Buttons */
.btn{display:inline-block;padding:12px 28px;background:#e53935;color:#fff;border-radius:25px;font-size:1rem;font-weight:600;transition:all .3s;border:none;cursor:pointer}
.btn:hover{background:#c62828;transform:translateY(-2px);box-shadow:0 5px 20px rgba(229,57,53,.3);color:#fff}
.btn-outline{background:transparent;border:2px solid #e53935;color:#e53935}
.btn-outline:hover{background:#e53935;color:#fff}

/* Lazy Load */
img[data-src]{opacity:0;transition:opacity .5s}
img.loaded{opacity:1}

/* Category Tabs */
.tab-nav{display:flex;gap:8px;justify-content:center;margin-bottom:30px;flex-wrap:wrap}
.tab-nav .tab-btn{padding:8px 20px;background:#1a1a1a;border:1px solid #333;border-radius:20px;color:#ccc;cursor:pointer;transition:all .3s;font-size:.9rem}
.tab-nav .tab-btn:hover,.tab-nav .tab-btn.active{background:#e53935;border-color:#e53935;color:#fff}

/* Entertainment Short Video Style */
.short-video-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.short-video-card{background:#151515;border-radius:12px;overflow:hidden;aspect-ratio:9/16;position:relative;cursor:pointer;transition:transform .3s}
.short-video-card:hover{transform:scale(1.03)}
.short-video-card img{width:100%;height:100%;object-fit:cover}
.short-video-card .overlay{position:absolute;bottom:0;left:0;right:0;padding:12px;background:linear-gradient(transparent,rgba(0,0,0,.85));color:#fff}
.short-video-card .overlay h5{font-size:.85rem;margin-bottom:4px}
.short-video-card .overlay .views{font-size:.75rem;color:#aaa}

/* Responsive */
@media(max-width:1024px){
.video-grid{grid-template-columns:repeat(3,1fr)}
.expert-grid{grid-template-columns:repeat(2,1fr)}
.ai-features{grid-template-columns:repeat(2,1fr)}
.howto-steps{grid-template-columns:repeat(2,1fr)}
.footer-grid{grid-template-columns:repeat(2,1fr)}
.short-video-grid{grid-template-columns:repeat(4,1fr)}
}
@media(max-width:768px){
.header-inner{flex-wrap:wrap}
.main-nav{display:none;width:100%;order:3}
.main-nav.show{display:block}
.main-nav ul{flex-direction:column;padding:10px 0}
.mobile-toggle{display:block}
.hero-banner{height:380px}
.hero-content h1{font-size:1.8rem}
.video-grid{grid-template-columns:repeat(2,1fr)}
.expert-grid{grid-template-columns:1fr}
.review-grid{grid-template-columns:1fr}
.contact-grid{grid-template-columns:1fr}
.ai-features{grid-template-columns:1fr}
.howto-steps{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr}
.short-video-grid{grid-template-columns:repeat(2,1fr)}
h1{font-size:1.8rem}
h2{font-size:1.5rem}
.section{padding:40px 0}
}
@media(max-width:480px){
.video-grid{grid-template-columns:1fr}
.short-video-grid{grid-template-columns:repeat(2,1fr)}
.hero-banner{height:300px}
.hero-content h1{font-size:1.5rem}
}

/* 91暗网 最新动态时间线 */
.news-timeline{max-width:800px;margin:0 auto}
.news-item{display:flex;gap:20px;margin-bottom:24px;padding:20px;background:#151515;border-radius:10px;border:1px solid #222;transition:border-color .3s}
.news-item:hover{border-color:#e53935}
.news-date{min-width:70px;font-size:.9rem;color:#e53935;font-weight:700;padding-top:2px}
.news-content h5{margin-bottom:6px;font-size:1rem}
.news-content p{font-size:.9rem;color:#999;margin-bottom:6px}
.news-author{font-size:.8rem;color:#666;font-style:italic}

/* 91暗网 亲密教育科普 */
.kepu-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.kepu-card{background:#151515;border-radius:10px;padding:24px;border:1px solid #222;transition:all .3s}
.kepu-card:hover{border-color:#e53935;transform:translateY(-3px)}
.kepu-icon{font-size:2.5rem;margin-bottom:12px}
.kepu-card h4{margin-bottom:8px;font-size:1rem}
.kepu-card p{font-size:.9rem;color:#999;margin-bottom:10px}
.kepu-stats{font-size:.8rem;color:#e53935;font-weight:600}

/* 91暗网 媒体报道 */
.media-reports{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.media-card{background:#151515;border-radius:10px;padding:24px;border:1px solid #222;transition:all .3s}
.media-card:hover{border-color:#e53935}
.media-source{display:inline-block;padding:4px 12px;background:rgba(229,57,53,.15);color:#e53935;border-radius:12px;font-size:.8rem;font-weight:600;margin-bottom:10px}
.media-card h5{margin-bottom:8px;font-size:1rem}
.media-card p{font-size:.9rem;color:#999;font-style:italic;margin-bottom:8px}
.media-date{font-size:.8rem;color:#666}

/* 91暗网 自媒体矩阵 */
.media-matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.matrix-item{background:#151515;border-radius:10px;padding:24px;border:1px solid #222;transition:all .3s}
.matrix-item:hover{border-color:#e53935;transform:translateY(-3px)}
.matrix-icon{width:50px;height:50px;background:rgba(229,57,53,.15);border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:12px;font-size:1.5rem;color:#e53935;font-weight:700}
.matrix-item h5{margin-bottom:6px}
.matrix-item p{font-size:.85rem;color:#999;margin-bottom:8px}
.matrix-tag{display:inline-block;padding:2px 10px;background:rgba(229,57,53,.1);border-radius:12px;font-size:.75rem;color:#ff8a80}

/* 91暗网 EEAT信任信号 */
.trust-signals{display:flex;justify-content:center;gap:30px;flex-wrap:wrap;padding:20px 0;margin-bottom:20px;border-top:1px solid #1a1a1a;border-bottom:1px solid #1a1a1a}
.trust-item{display:flex;align-items:center;gap:8px;font-size:.85rem;color:#888}
.trust-icon{font-size:1.2rem}

/* 91暗网 专家资质标签 */
.expert-credential{font-size:.8rem;color:#ffc107;margin-bottom:8px;padding:4px 12px;background:rgba(255,193,7,.1);border-radius:12px;display:inline-block}

/* 91暗网 视频发布时间 */
.video-meta-time{font-size:.75rem;color:#666;margin-top:6px}

/* 91暗网 文章内容页 */
.article-content{max-width:800px;margin:0 auto;line-height:2}
.article-content h2{margin:30px 0 12px;padding-bottom:8px;border-bottom:1px solid #222}
.article-content h3{margin:20px 0 8px;color:#e53935}
.article-content p{text-indent:2em;margin-bottom:16px}
.update-notice{text-indent:0!important;padding:12px 16px;background:rgba(229,57,53,.08);border-left:3px solid #e53935;border-radius:4px;font-size:.9rem;color:#aaa;margin-bottom:24px}

/* 91暗网 Footer Logo */
.footer-logo-wrap{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.footer-logo-wrap img{height:40px;width:auto}
.footer-logo-wrap h4{margin-bottom:0}

/* 91暗网 底部链接 */
.footer-bottom a{color:#888;margin:0 4px}
.footer-bottom a:hover{color:#e53935}

/* 响应式补充 */
@media(max-width:1024px){
.kepu-grid{grid-template-columns:repeat(2,1fr)}
.media-reports{grid-template-columns:repeat(2,1fr)}
.media-matrix{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
.kepu-grid{grid-template-columns:1fr}
.media-reports{grid-template-columns:1fr}
.media-matrix{grid-template-columns:1fr}
.news-item{flex-direction:column;gap:8px}
.news-date{min-width:auto}
.trust-signals{gap:15px}
.trust-item{font-size:.75rem}
}