/* ========================================
   潘多拉魔盒视频 - 主样式表
   品牌：潘多拉魔盒视频 | ptgmp.cn
   ======================================== */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;color:#333;line-height:1.8;background:#f8f9fa;overflow-x:hidden}
a{color:#1a73e8;text-decoration:none;transition:color .3s}
a:hover{color:#e63946}
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:#1a1a2e}

/* Header */
.site-header{background:linear-gradient(135deg,#0d1117 0%,#161b22 100%);position:sticky;top:0;z-index:1000;box-shadow:0 2px 20px rgba(0,0,0,.3)}
.header-inner{max-width:1400px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:70px}
.site-logo{display:flex;align-items:center;gap:10px}
.site-logo img{height:45px;width:auto}
.site-logo span{color:#fff;font-size:18px;font-weight:700;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{color:#e0e0e0;padding:0 15px;font-size:14px;height:70px;display:flex;align-items:center;transition:all .3s;border-bottom:3px solid transparent}
.main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(255,255,255,.05);border-bottom-color:#e63946}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:28px;cursor:pointer;padding:10px}

/* Search */
.search-bar{max-width:100%;background:#161b22;border-bottom:1px solid #30363d;padding:10px 20px}
.search-bar form{display:flex;max-width:600px;margin:0 auto}
.search-bar input{flex:1;padding:8px 16px;border:1px solid #30363d;border-radius:4px 0 0 4px;background:#0d1117;color:#fff;font-size:14px;outline:none}
.search-bar input::placeholder{color:#666}
.search-bar input:focus{border-color:#1a73e8}
.search-bar button{padding:8px 20px;background:#e63946;color:#fff;border:none;border-radius:0 4px 4px 0;cursor:pointer;font-size:14px;transition:background .3s}
.search-bar button:hover{background:#c62828}

/* Banner */
.hero-banner{position:relative;height:500px;overflow:hidden;background:#0d1117}
.hero-banner img{width:100%;height:100%;object-fit:cover;opacity:.7}
.hero-content{position:absolute;top:0;left:0;right:0;bottom:0;display:flex;flex-direction:column;justify-content:center;padding:0 60px;max-width:1400px;margin:0 auto}
.hero-content h1{font-size:42px;color:#fff;margin-bottom:15px;text-shadow:2px 2px 8px rgba(0,0,0,.6)}
.hero-content h2{font-size:22px;color:#e0e0e0;margin-bottom:10px;font-weight:400;text-shadow:1px 1px 4px rgba(0,0,0,.5)}
.hero-content p{font-size:16px;color:#ccc;max-width:600px;margin-bottom:25px}
.hero-btns{display:flex;gap:15px;flex-wrap:wrap}
.btn-primary{display:inline-block;padding:12px 30px;background:#e63946;color:#fff;border-radius:6px;font-size:15px;font-weight:600;transition:all .3s;border:none;cursor:pointer}
.btn-primary:hover{background:#c62828;color:#fff;transform:translateY(-2px);box-shadow:0 4px 15px rgba(230,57,70,.4)}
.btn-outline{display:inline-block;padding:12px 30px;border:2px solid #fff;color:#fff;border-radius:6px;font-size:15px;font-weight:600;transition:all .3s}
.btn-outline:hover{background:#fff;color:#1a1a2e}

/* Breadcrumb */
.breadcrumb{max-width:1400px;margin:0 auto;padding:12px 20px;font-size:13px;color:#666}
.breadcrumb a{color:#1a73e8}
.breadcrumb span{margin:0 6px;color:#999}

/* Sections */
.section{padding:60px 20px}
.section-dark{background:linear-gradient(135deg,#0d1117 0%,#1a1a2e 100%);color:#fff}
.section-dark h2,.section-dark h3,.section-dark h4{color:#fff}
.section-alt{background:#f0f2f5}
.container{max-width:1400px;margin:0 auto}
.section-header{text-align:center;margin-bottom:45px}
.section-header h2{font-size:32px;margin-bottom:10px;position:relative;display:inline-block}
.section-header h2::after{content:'';position:absolute;bottom:-8px;left:50%;transform:translateX(-50%);width:60px;height:3px;background:#e63946;border-radius:2px}
.section-header p{color:#666;font-size:15px;margin-top:18px;max-width:700px;margin-left:auto;margin-right:auto}
.section-dark .section-header p{color:#aaa}

/* Video Grid */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.video-card{background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.08);transition:all .3s;position:relative}
.video-card:hover{transform:translateY(-5px);box-shadow:0 8px 30px rgba(0,0,0,.15)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#000}
.video-thumb img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .video-thumb img{transform:scale(1.05)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;background:rgba(230,57,70,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:all .3s;cursor:pointer}
.video-card:hover .play-btn{opacity:1}
.play-btn::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,.8);color:#fff;padding:2px 8px;border-radius:3px;font-size:12px;z-index:2}
.video-info{padding:15px}
.video-info h3{font-size:15px;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-info h3 a{color:#1a1a2e}
.video-info h3 a:hover{color:#e63946}
.video-meta{display:flex;align-items:center;gap:12px;font-size:12px;color:#999;flex-wrap:wrap}
.video-meta span{display:flex;align-items:center;gap:3px}
.video-tags{margin-top:8px;display:flex;gap:6px;flex-wrap:wrap}
.video-tags span{background:#f0f2f5;color:#666;padding:2px 8px;border-radius:3px;font-size:11px}

/* Expert Cards */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.08);text-align:center;padding:30px 20px;transition:all .3s}
.expert-card:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(0,0,0,.12)}
.expert-avatar{width:100px;height:100px;border-radius:50%;margin:0 auto 15px;background:linear-gradient(135deg,#e63946,#1a73e8);display:flex;align-items:center;justify-content:center;color:#fff;font-size:36px;font-weight:700}
.expert-card h4{font-size:18px;margin-bottom:5px}
.expert-card .role{color:#e63946;font-size:13px;margin-bottom:10px;display:block}
.expert-card p{font-size:13px;color:#666;margin-bottom:15px;line-height:1.6}
.expert-links{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}
.expert-links a{padding:6px 14px;border:1px solid #e63946;color:#e63946;border-radius:4px;font-size:12px;transition:all .3s}
.expert-links a:hover{background:#e63946;color:#fff}

/* FAQ */
.faq-list{max-width:900px;margin:0 auto}
.faq-item{background:#fff;border-radius:8px;margin-bottom:12px;box-shadow:0 1px 6px rgba(0,0,0,.06);overflow:hidden}
.faq-question{padding:18px 24px;font-size:15px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .3s;user-select:none}
.faq-question:hover{background:#f8f9fa}
.faq-question::after{content:'+';font-size:22px;color:#e63946;transition:transform .3s;font-weight:300}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all .4s ease;color:#666;font-size:14px;line-height:1.8}
.faq-item.active .faq-answer{padding:0 24px 18px;max-height:500px}

/* Reviews */
.review-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.review-card{background:#fff;border-radius:10px;padding:25px;box-shadow:0 2px 12px rgba(0,0,0,.08);position:relative}
.review-card::before{content:'\201C';position:absolute;top:10px;left:15px;font-size:50px;color:#e63946;opacity:.2;font-family:serif}
.review-stars{color:#ffc107;margin-bottom:10px;font-size:16px;letter-spacing:2px}
.review-text{font-size:14px;color:#555;margin-bottom:15px;line-height:1.7}
.review-author{display:flex;align-items:center;gap:10px}
.review-author-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#e63946,#1a73e8);display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px;font-weight:700}
.review-author-info{font-size:13px}
.review-author-info strong{display:block;color:#1a1a2e}
.review-author-info span{color:#999}

/* Feature Grid */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:#fff;border-radius:10px;padding:30px;text-align:center;box-shadow:0 2px 12px rgba(0,0,0,.08);transition:all .3s}
.feature-card:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(0,0,0,.12)}
.feature-icon{width:70px;height:70px;border-radius:50%;background:linear-gradient(135deg,#e63946,#ff6b6b);margin:0 auto 20px;display:flex;align-items:center;justify-content:center;font-size:30px;color:#fff}
.feature-card h4{font-size:18px;margin-bottom:10px}
.feature-card p{font-size:14px;color:#666;line-height:1.6}

/* Partner Logos */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-wall .partner-item{background:#fff;padding:20px 30px;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,.06);font-size:16px;font-weight:700;color:#555;transition:all .3s;min-width:150px;text-align:center}
.partner-wall .partner-item:hover{box-shadow:0 4px 15px rgba(0,0,0,.12);transform:translateY(-3px)}

/* Contact Section */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:40px}
.contact-info{display:flex;flex-direction:column;gap:20px}
.contact-item{display:flex;gap:15px;align-items:flex-start}
.contact-icon{width:45px;height:45px;border-radius:50%;background:#e63946;display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;flex-shrink:0}
.contact-detail h4{font-size:16px;margin-bottom:4px}
.contact-detail p{font-size:14px;color:#666}
.qrcode-group{display:flex;gap:30px;justify-content:center;flex-wrap:wrap}
.qrcode-item{text-align:center}
.qrcode-item img{width:160px;height:160px;border-radius:8px;margin-bottom:8px;border:2px solid #eee}
.qrcode-item p{font-size:13px;color:#666}

/* Social Share */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:6px;color:#fff;font-size:13px;transition:all .3s;cursor:pointer}
.share-btn:hover{transform:translateY(-2px);color:#fff}
.share-wechat{background:#07c160}
.share-weibo{background:#e6162d}
.share-douyin{background:#161823}
.share-bilibili{background:#00a1d6}

/* Footer */
.site-footer{background:#0d1117;color:#aaa;padding:40px 20px 20px}
.footer-inner{max-width:1400px;margin:0 auto}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-bottom:30px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:15px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:#e63946}
.footer-col p{font-size:13px;line-height:1.8;margin-bottom:8px}
.footer-col a{color:#aaa;font-size:13px;display:block;margin-bottom:6px;transition:color .3s}
.footer-col a:hover{color:#e63946}
.footer-bottom{border-top:1px solid #30363d;padding-top:20px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;font-size:12px}
.footer-bottom p{color:#666}

/* How-To Guide */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:30px}
.howto-step{text-align:center;padding:25px 20px;background:#fff;border-radius:10px;box-shadow:0 2px 12px rgba(0,0,0,.08);position:relative}
.step-number{width:50px;height:50px;border-radius:50%;background:#e63946;color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:700;margin:0 auto 15px}
.howto-step h4{font-size:16px;margin-bottom:8px}
.howto-step p{font-size:13px;color:#666}

/* Content Page */
.page-hero{height:300px;position:relative;overflow:hidden;background:#0d1117}
.page-hero img{width:100%;height:100%;object-fit:cover;opacity:.5}
.page-hero-content{position:absolute;top:0;left:0;right:0;bottom:0;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center}
.page-hero-content h1{font-size:36px;color:#fff;margin-bottom:10px}
.page-hero-content p{color:#ccc;font-size:16px}

/* Article Content */
.article-content{max-width:900px;margin:0 auto;padding:40px 20px}
.article-content h2{font-size:26px;margin:30px 0 15px;padding-bottom:10px;border-bottom:2px solid #e63946}
.article-content h3{font-size:20px;margin:25px 0 12px}
.article-content p{margin-bottom:16px;font-size:15px;line-height:2}
.article-content img{border-radius:8px;margin:20px 0}

/* Two Column Layout */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.two-col img{border-radius:10px}

/* Stats */
.stats-bar{display:flex;justify-content:center;gap:60px;padding:40px 20px;flex-wrap:wrap}
.stat-item{text-align:center}
.stat-item .number{font-size:42px;font-weight:700;color:#e63946;display:block}
.stat-item .label{font-size:14px;color:#aaa;margin-top:5px}

/* Tags Cloud */
.tags-cloud{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:20px}
.tags-cloud a{background:rgba(255,255,255,.1);color:#ccc;padding:6px 16px;border-radius:20px;font-size:13px;transition:all .3s}
.tags-cloud a:hover{background:#e63946;color:#fff}

/* MCP Frontend Placeholder */
.mcp-widget{background:#161b22;border:1px solid #30363d;border-radius:8px;padding:20px;margin:20px 0;text-align:center;color:#aaa;font-size:14px}
.mcp-widget h4{color:#fff;margin-bottom:10px}

/* Responsive */
@media(max-width:1024px){
.video-grid,.review-grid{grid-template-columns:repeat(2,1fr)}
.expert-grid{grid-template-columns:repeat(2,1fr)}
.feature-grid{grid-template-columns:repeat(2,1fr)}
.footer-grid{grid-template-columns:repeat(2,1fr)}
.howto-steps{grid-template-columns:repeat(2,1fr)}
.contact-grid{grid-template-columns:1fr}
.two-col{grid-template-columns:1fr}
}
@media(max-width:768px){
.header-inner{height:60px}
.main-nav{display:none;position:absolute;top:60px;left:0;right:0;background:#0d1117;flex-direction:column;padding:10px 0;box-shadow:0 4px 20px rgba(0,0,0,.3)}
.main-nav.active{display:flex}
.main-nav a{height:auto;padding:12px 20px;border-bottom:none}
.nav-toggle{display:block}
.hero-banner{height:350px}
.hero-content{padding:0 20px}
.hero-content h1{font-size:28px}
.hero-content h2{font-size:18px}
.video-grid,.review-grid,.expert-grid{grid-template-columns:1fr}
.feature-grid{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr}
.howto-steps{grid-template-columns:1fr}
.section{padding:40px 15px}
.section-header h2{font-size:24px}
.stats-bar{gap:30px}
.stat-item .number{font-size:32px}
.page-hero{height:200px}
.page-hero-content h1{font-size:24px}
}
@media(max-width:480px){
.hero-banner{height:280px}
.hero-content h1{font-size:22px}
.hero-btns{flex-direction:column}
.btn-primary,.btn-outline{text-align:center}
.qrcode-group{flex-direction:column;align-items:center}
}

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

/* Animation */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.animate-in{animation:fadeInUp .6s ease forwards}