/* ===== 51黑料网 - 全站样式表 ===== */
/* 品牌色系：紫色渐变 #7c3aed -> #ec4899 */

/* Reset & Base */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:#1a1a2e;background:#f8f9fa;line-height:1.6;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:color .3s}
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}

/* Container */
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== Header ===== */
.site-header{background:linear-gradient(135deg,#1a1a2e 0%,#16213e 100%);position:sticky;top:0;z-index:1000;box-shadow:0 2px 20px rgba(0,0,0,.3)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;max-width:1200px;margin:0 auto}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{width:48px;height:48px;border-radius:8px}
.logo-wrap .brand-name{color:#fff;font-size:1.4rem;font-weight:800;background:linear-gradient(135deg,#a78bfa,#ec4899);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.main-nav{display:flex;gap:6px}
.main-nav a{color:#cbd5e1;padding:8px 16px;border-radius:8px;font-size:.95rem;font-weight:500;transition:all .3s}
.main-nav a:hover,.main-nav a.active{color:#fff;background:linear-gradient(135deg,#7c3aed,#ec4899)}
.mobile-menu-btn{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* Search Bar */
.search-bar{background:linear-gradient(135deg,#7c3aed 0%,#ec4899 100%);padding:12px 0}
.search-bar .container{display:flex;justify-content:center}
.search-form{display:flex;width:100%;max-width:600px;position:relative}
.search-form input{flex:1;padding:12px 20px;border:none;border-radius:25px 0 0 25px;font-size:1rem;outline:none;background:#fff}
.search-form button{padding:12px 28px;border:none;border-radius:0 25px 25px 0;background:#1a1a2e;color:#fff;font-size:1rem;cursor:pointer;transition:background .3s}
.search-form button:hover{background:#16213e}

/* ===== Hero Slider ===== */
.hero-section{position:relative;overflow:hidden;height:500px;background:#1a1a2e}
.hero-slides{display:flex;transition:transform .6s ease;height:100%}
.hero-slide{min-width:100%;position:relative}
.hero-slide img{width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(26,26,46,.85) 0%,rgba(26,26,46,.3) 50%,transparent 100%);display:flex;align-items:flex-end;padding:60px 40px}
.hero-text h1{color:#fff;font-size:2.5rem;margin-bottom:12px;text-shadow:0 2px 10px rgba(0,0,0,.5)}
.hero-text p{color:#cbd5e1;font-size:1.1rem;max-width:600px}
.hero-dots{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:10}
.hero-dots span{width:12px;height:12px;border-radius:50%;background:rgba(255,255,255,.4);cursor:pointer;transition:all .3s}
.hero-dots span.active{background:#ec4899;transform:scale(1.2)}

/* ===== Section Common ===== */
.section{padding:60px 0}
.section-dark{background:#1a1a2e;color:#fff}
.section-gray{background:#f1f5f9}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:2rem;margin-bottom:8px;position:relative;display:inline-block}
.section-title h2::after{content:'';position:absolute;bottom:-8px;left:50%;transform:translateX(-50%);width:60px;height:3px;background:linear-gradient(135deg,#7c3aed,#ec4899);border-radius:2px}
.section-title p{color:#64748b;font-size:1rem;margin-top:16px}
.section-dark .section-title p{color:#94a3b8}

/* ===== Video Card Grid ===== */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-5px);box-shadow:0 12px 30px rgba(0,0,0,.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 span{width:60px;height:60px;background:linear-gradient(135deg,#7c3aed,#ec4899);border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px rgba(124,58,237,.5)}
.play-btn span::after{content:'';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,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:.8rem}
.video-info{padding:14px}
.video-info h3{font-size:1rem;font-weight:600;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;align-items:center;gap:12px;color:#94a3b8;font-size:.85rem}
.video-meta .views::before{content:'👁 '}
.video-meta .likes::before{content:'❤ '}
.video-meta .comments::before{content:'💬 '}
.video-tag{display:inline-block;padding:2px 10px;border-radius:12px;font-size:.75rem;background:linear-gradient(135deg,#ede9fe,#fce7f3);color:#7c3aed;margin-top:6px}
.section-dark .video-card{background:#16213e}
.section-dark .video-info h3{color:#e2e8f0}
.section-dark .video-tag{background:linear-gradient(135deg,#312e81,#831843);color:#c4b5fd}

/* ===== Feature Modules ===== */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.feature-card{background:#fff;border-radius:12px;padding:30px 24px;text-align:center;box-shadow:0 4px 15px rgba(0,0,0,.06);transition:transform .3s}
.feature-card:hover{transform:translateY(-5px)}
.feature-icon{width:64px;height:64px;margin:0 auto 16px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.8rem;background:linear-gradient(135deg,#ede9fe,#fce7f3)}
.feature-card h3{font-size:1.1rem;margin-bottom:8px}
.feature-card p{color:#64748b;font-size:.9rem}
.section-dark .feature-card{background:#16213e}
.section-dark .feature-card p{color:#94a3b8}

/* ===== Expert Section ===== */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.expert-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,.08);text-align:center;transition:transform .3s}
.expert-card:hover{transform:translateY(-5px)}
.expert-avatar{width:120px;height:120px;border-radius:50%;margin:24px auto 16px;overflow:hidden;border:3px solid #ec4899}
.expert-avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h3{font-size:1.1rem;margin-bottom:4px}
.expert-role{color:#7c3aed;font-size:.9rem;font-weight:500;margin-bottom:8px}
.expert-desc{color:#64748b;font-size:.85rem;padding:0 20px;margin-bottom:16px}
.expert-btns{display:flex;gap:8px;justify-content:center;padding:0 20px 24px}
.btn-primary{padding:8px 20px;border-radius:20px;background:linear-gradient(135deg,#7c3aed,#ec4899);color:#fff;font-size:.85rem;border:none;cursor:pointer;transition:opacity .3s}
.btn-primary:hover{opacity:.85}
.btn-outline{padding:8px 20px;border-radius:20px;border:1px solid #7c3aed;color:#7c3aed;font-size:.85rem;background:transparent;cursor:pointer;transition:all .3s}
.btn-outline:hover{background:#7c3aed;color:#fff}

/* ===== Partner Logos ===== */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-wall .partner-item{width:120px;height:60px;background:#fff;border-radius:8px;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 10px rgba(0,0,0,.06);padding:10px;filter:grayscale(1);opacity:.6;transition:all .3s}
.partner-wall .partner-item:hover{filter:grayscale(0);opacity:1}

/* ===== Reviews ===== */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.review-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 15px rgba(0,0,0,.06)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.review-avatar{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,#7c3aed,#ec4899);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.2rem}
.review-name{font-weight:600}
.review-stars{color:#f59e0b;font-size:.9rem}
.review-text{color:#475569;font-size:.95rem;line-height:1.7}

/* ===== Contact Section ===== */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.contact-card{background:#fff;border-radius:12px;padding:24px;text-align:center;box-shadow:0 4px 15px rgba(0,0,0,.06)}
.contact-card h4{font-size:1.1rem;margin-bottom:12px;color:#1a1a2e}
.contact-card p{color:#64748b;font-size:.9rem;margin-bottom:8px}
.contact-qr{width:160px;height:160px;margin:12px auto;border-radius:8px;overflow:hidden}
.contact-qr img{width:100%;height:100%;object-fit:cover}

/* ===== FAQ ===== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:12px;margin-bottom:12px;overflow:hidden;box-shadow:0 2px 10px rgba(0,0,0,.05)}
.faq-question{padding:18px 24px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .3s}
.faq-question:hover{background:#f8fafc}
.faq-question::after{content:'+';font-size:1.4rem;color:#7c3aed;transition:transform .3s}
.faq-item.open .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all .3s;color:#64748b;font-size:.95rem}
.faq-item.open .faq-answer{padding:0 24px 18px;max-height:500px}

/* ===== Social Share ===== */
.share-bar{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.share-btn{display:flex;align-items:center;gap:6px;padding:10px 20px;border-radius:25px;color:#fff;font-size:.9rem;transition:opacity .3s;cursor:pointer}
.share-btn:hover{opacity:.85}
.share-wechat{background:#07c160}
.share-weibo{background:#e6162d}
.share-douyin{background:#161823}
.share-bilibili{background:#00a1d6}

/* ===== Footer ===== */
.site-footer{background:#0f0f23;color:#94a3b8;padding:50px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:30px;margin-bottom:40px}
.footer-col h4{color:#fff;font-size:1.1rem;margin-bottom:16px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:40px;height:2px;background:linear-gradient(135deg,#7c3aed,#ec4899)}
.footer-col p,.footer-col a{display:block;color:#94a3b8;font-size:.9rem;margin-bottom:8px;transition:color .3s}
.footer-col a:hover{color:#ec4899}
.footer-qr-wrap{display:flex;gap:16px}
.footer-qr{width:100px;text-align:center}
.footer-qr img{width:100px;height:100px;border-radius:8px;margin-bottom:4px}
.footer-qr span{font-size:.75rem;color:#64748b}
.footer-bottom{border-top:1px solid #1e293b;padding:20px 0;text-align:center;font-size:.85rem}
.footer-bottom a{color:#a78bfa}

/* ===== Breadcrumb ===== */
.breadcrumb{padding:12px 0;font-size:.9rem;color:#64748b}
.breadcrumb a{color:#7c3aed}
.breadcrumb span{margin:0 8px;color:#cbd5e1}

/* ===== Page Banner ===== */
.page-banner{background:linear-gradient(135deg,#1a1a2e 0%,#16213e 100%);padding:60px 0;text-align:center}
.page-banner h1{color:#fff;font-size:2.2rem;margin-bottom:8px}
.page-banner p{color:#94a3b8;font-size:1rem}

/* ===== Tabs ===== */
.tab-nav{display:flex;justify-content:center;gap:8px;margin-bottom:30px;flex-wrap:wrap}
.tab-btn{padding:10px 24px;border-radius:25px;border:1px solid #e2e8f0;background:#fff;color:#475569;font-size:.9rem;cursor:pointer;transition:all .3s}
.tab-btn.active,.tab-btn:hover{background:linear-gradient(135deg,#7c3aed,#ec4899);color:#fff;border-color:transparent}

/* ===== Tool Cards ===== */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.tool-card{background:#fff;border-radius:12px;padding:30px;box-shadow:0 4px 15px rgba(0,0,0,.06);transition:transform .3s;border:1px solid #f1f5f9}
.tool-card:hover{transform:translateY(-5px);border-color:#7c3aed}
.tool-card h3{font-size:1.1rem;margin-bottom:8px}
.tool-card p{color:#64748b;font-size:.9rem;margin-bottom:16px}
.tool-badge{display:inline-block;padding:4px 12px;border-radius:12px;font-size:.75rem;background:#ede9fe;color:#7c3aed;margin-right:6px}

/* ===== Community ===== */
.community-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.community-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,.06)}
.community-card .card-header{padding:16px 20px;background:linear-gradient(135deg,#7c3aed,#ec4899);color:#fff}
.community-card .card-header h3{font-size:1.1rem}
.community-card .card-body{padding:20px}
.community-card .card-body p{color:#64748b;font-size:.9rem;margin-bottom:12px}
.community-stat{display:flex;gap:16px;font-size:.85rem;color:#94a3b8}

/* ===== Live Badge ===== */
.live-badge{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:12px;background:#ef4444;color:#fff;font-size:.75rem;font-weight:600}
.live-badge::before{content:'';width:6px;height:6px;border-radius:50%;background:#fff;animation:pulse 1.5s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}

/* ===== Responsive ===== */
@media(max-width:768px){
  .header-inner{flex-wrap:wrap}
  .main-nav{display:none;width:100%;flex-direction:column;gap:4px;padding-top:12px}
  .main-nav.open{display:flex}
  .mobile-menu-btn{display:block}
  .hero-section{height:300px}
  .hero-text h1{font-size:1.6rem}
  .hero-overlay{padding:30px 20px}
  .section{padding:40px 0}
  .section-title h2{font-size:1.5rem}
  .video-grid,.feature-grid,.expert-grid,.contact-grid,.review-grid,.tool-grid,.community-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .search-form{max-width:100%}
}
@media(max-width:480px){
  .footer-grid{grid-template-columns:1fr}
  .hero-section{height:240px}
  .hero-text h1{font-size:1.3rem}
  .partner-wall .partner-item{width:80px;height:40px}
}

/* ===== Animations ===== */
.fade-in{opacity:0;transform:translateY(20px);transition:all .6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* ===== Lazy Load Placeholder ===== */
.lazy{opacity:0;transition:opacity .5s}
.lazy.loaded{opacity:1}

/* ===== Stats Bar ===== */
.stats-bar{background:linear-gradient(135deg,#7c3aed,#ec4899);padding:30px 0;color:#fff}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat-item .stat-num{font-size:2rem;font-weight:800}
.stat-item .stat-label{font-size:.9rem;opacity:.8}
@media(max-width:768px){.stats-grid{grid-template-columns:repeat(2,1fr)}}

/* ===== MCP Frontend ===== */
.mcp-widget{background:#16213e;border-radius:12px;padding:20px;margin-top:20px;border:1px solid #1e293b}
.mcp-widget h5{color:#a78bfa;margin-bottom:8px;font-size:.9rem}
.mcp-widget .mcp-status{display:flex;align-items:center;gap:8px;color:#94a3b8;font-size:.85rem}
.mcp-widget .mcp-dot{width:8px;height:8px;border-radius:50%;background:#22c55e;animation:pulse 2s infinite}