:root{--primary:#1a0a2e;--secondary:#ff6b35;--accent:#00d4aa;--bg-dark:#0d0d1a;--bg-card:#1e1e3a;--bg-card-hover:#2a2a4a;--text-light:#e8e8f0;--text-muted:#9a9ab0;--text-white:#fff;--border-color:#2e2e5a;--gradient-accent:linear-gradient(135deg,#ff6b35,#ff8f65);--gradient-cyan:linear-gradient(135deg,#00d4aa,#00f0c0);--shadow-card:0 8px 32px rgba(0,0,0,.3);--shadow-hover:0 12px 48px rgba(255,107,53,.15);--radius:12px;--radius-sm:8px;--tr:all .3s cubic-bezier(.4,0,.2,1)}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;background:var(--bg-dark);color:var(--text-light);line-height:1.7;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:var(--secondary);text-decoration:none;transition:var(--tr)}
a:hover{color:var(--accent)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
.container{max-width:1280px;margin:0 auto;padding:0 20px}
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(13,13,26,.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid rgba(255,107,53,.1);transition:var(--tr)}
.site-header.scrolled{background:rgba(13,13,26,.98);box-shadow:0 4px 30px rgba(0,0,0,.5)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:70px;max-width:1280px;margin:0 auto;padding:0 20px}
.site-logo{display:flex;align-items:center;gap:10px}
.site-logo img{height:42px;width:auto}
.site-logo .logo-text{font-size:1.3rem;font-weight:700;color:var(--text-white);letter-spacing:1px}
.site-logo .logo-text span{color:var(--secondary)}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{color:var(--text-light);font-size:.95rem;padding:8px 16px;border-radius:var(--radius-sm);transition:var(--tr);white-space:nowrap}
.main-nav a:hover,.main-nav a.active{color:var(--secondary);background:rgba(255,107,53,.1)}
.mobile-menu-btn{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:5px}
.mobile-menu-btn span{width:24px;height:2px;background:var(--text-light);transition:var(--tr);border-radius:2px}
.search-bar{background:rgba(26,10,46,.6);border-bottom:1px solid var(--border-color);padding:12px 0;margin-top:70px}
.search-bar-inner{max-width:680px;margin:0 auto;padding:0 20px;position:relative}
.search-bar input{width:100%;padding:12px 50px 12px 20px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:50px;color:var(--text-light);font-size:.95rem;outline:none;transition:var(--tr)}
.search-bar input:focus{border-color:var(--secondary);box-shadow:0 0 20px rgba(255,107,53,.15)}
.search-bar input::placeholder{color:var(--text-muted)}
.search-bar .search-btn{position:absolute;right:28px;top:50%;transform:translateY(-50%);background:var(--gradient-accent);border:none;color:#fff;width:36px;height:36px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1rem;transition:var(--tr)}
.search-bar .search-btn:hover{transform:translateY(-50%) scale(1.1)}
.hero-section{position:relative;min-height:520px;display:flex;align-items:center;overflow:hidden;background:linear-gradient(135deg,#1a0a2e,#0d0d1a)}
.hero-bg{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;opacity:.35}
.hero-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(180deg,rgba(13,13,26,.4),rgba(13,13,26,.85))}
.hero-content{position:relative;z-index:2;max-width:1280px;margin:0 auto;padding:80px 20px 60px;text-align:center}
.hero-content h1{font-size:2.8rem;font-weight:800;color:var(--text-white);margin-bottom:16px;line-height:1.3}
.hero-content h1 .highlight{color:var(--secondary)}
.hero-content h2{font-size:1.3rem;font-weight:400;color:var(--text-muted);margin-bottom:30px}
.hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:30px}
.hero-tags span{background:rgba(255,107,53,.12);color:var(--secondary);padding:6px 18px;border-radius:50px;font-size:.88rem;border:1px solid rgba(255,107,53,.25)}
.hero-btns{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.btn-primary{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;background:var(--gradient-accent);color:#fff;font-size:1rem;font-weight:600;border-radius:50px;border:none;cursor:pointer;transition:var(--tr);box-shadow:0 4px 20px rgba(255,107,53,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(255,107,53,.4);color:#fff}
.btn-outline{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;background:transparent;color:var(--accent);font-size:1rem;font-weight:600;border-radius:50px;border:2px solid var(--accent);cursor:pointer;transition:var(--tr)}
.btn-outline:hover{background:var(--accent);color:var(--bg-dark);transform:translateY(-2px)}
.section{padding:70px 0}
.section-header{text-align:center;margin-bottom:50px}
.section-header h2{font-size:2rem;font-weight:700;color:var(--text-white);margin-bottom:12px}
.section-header h2 .hl{color:var(--secondary)}
.section-header p{color:var(--text-muted);font-size:1.05rem;max-width:680px;margin:0 auto}
.section-alt{background:rgba(26,10,46,.3)}
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.video-card{background:var(--bg-card);border-radius:var(--radius);overflow:hidden;border:1px solid var(--border-color);transition:var(--tr);cursor:pointer}
.video-card:hover{transform:translateY(-6px);border-color:var(--secondary);box-shadow:var(--shadow-hover)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden}
.video-thumb img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:var(--tr)}
.video-card:hover .video-thumb img{transform:scale(1.05)}
.video-play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;background:rgba(255,107,53,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:var(--tr);z-index:3}
.video-play-btn::after{content:"";width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:3px}
.video-play-btn.visible,.video-card:hover .video-play-btn{opacity:1}
.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;z-index:2}
.video-info{padding:16px}
.video-info h3{font-size:1rem;font-weight:600;color:var(--text-white);margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;align-items:center;gap:14px;color:var(--text-muted);font-size:.82rem}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.video-tags span{background:rgba(0,212,170,.1);color:var(--accent);padding:2px 10px;border-radius:50px;font-size:.75rem}
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.expert-card{background:var(--bg-card);border-radius:var(--radius);padding:30px 24px;text-align:center;border:1px solid var(--border-color);transition:var(--tr)}
.expert-card:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:0 8px 30px rgba(0,212,170,.1)}
.expert-avatar{width:100px;height:100px;border-radius:50%;margin:0 auto 16px;overflow:hidden;border:3px solid var(--secondary)}
.expert-avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h3{font-size:1.15rem;color:var(--text-white);margin-bottom:4px}
.expert-card .expert-title{color:var(--secondary);font-size:.88rem;margin-bottom:12px}
.expert-card .expert-desc{color:var(--text-muted);font-size:.88rem;line-height:1.6;margin-bottom:16px}
.expert-card .expert-awards{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;margin-bottom:16px}
.expert-card .expert-awards span{background:rgba(255,107,53,.1);color:var(--secondary);padding:3px 10px;border-radius:50px;font-size:.75rem}
.expert-btns{display:flex;justify-content:center;gap:10px}
.btn-sm{padding:8px 18px;font-size:.85rem;border-radius:50px;border:none;cursor:pointer;transition:var(--tr)}
.btn-sm-primary{background:var(--gradient-accent);color:#fff}
.btn-sm-outline{background:transparent;color:var(--accent);border:1px solid var(--accent)}
.btn-sm:hover{transform:translateY(-2px)}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius);margin-bottom:12px;overflow:hidden}
.faq-question{padding:18px 24px;display:flex;justify-content:space-between;align-items:center;cursor:pointer;transition:var(--tr)}
.faq-question:hover{background:var(--bg-card-hover)}
.faq-question h3{font-size:1rem;font-weight:600;color:var(--text-white)}
.faq-question .faq-icon{color:var(--secondary);font-size:1.2rem;transition:var(--tr);flex-shrink:0;margin-left:16px}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-answer-inner{padding:0 24px 18px;color:var(--text-muted);font-size:.95rem;line-height:1.7}
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.review-card{background:var(--bg-card);border-radius:var(--radius);padding:24px;border:1px solid var(--border-color);transition:var(--tr)}
.review-card:hover{border-color:rgba(255,107,53,.3)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.review-avatar{width:44px;height:44px;border-radius:50%;background:var(--gradient-accent);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.1rem;flex-shrink:0}
.review-user h4{font-size:.95rem;color:var(--text-white)}
.review-user .review-date{font-size:.8rem;color:var(--text-muted)}
.review-stars{color:var(--secondary);font-size:.9rem;margin-bottom:10px;letter-spacing:2px}
.review-text{color:var(--text-muted);font-size:.92rem;line-height:1.7}
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.contact-card{background:var(--bg-card);border-radius:var(--radius);padding:30px 24px;text-align:center;border:1px solid var(--border-color);transition:var(--tr)}
.contact-card:hover{border-color:var(--secondary)}
.contact-icon{width:56px;height:56px;border-radius:50%;background:rgba(255,107,53,.1);display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:1.5rem;color:var(--secondary)}
.contact-card h3{font-size:1.05rem;color:var(--text-white);margin-bottom:8px}
.contact-card p{color:var(--text-muted);font-size:.9rem}
.partner-section{text-align:center}
.partner-img{border-radius:var(--radius);overflow:hidden;margin-bottom:20px}
.partner-img img{width:100%;border-radius:var(--radius)}
.howto-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:24px;margin-top:30px}
.howto-step{background:var(--bg-card);border-radius:var(--radius);padding:30px 24px;text-align:center;border:1px solid var(--border-color);position:relative}
.step-num{width:48px;height:48px;border-radius:50%;background:var(--gradient-accent);display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:1.3rem;font-weight:700;color:#fff}
.howto-step h3{font-size:1.05rem;color:var(--text-white);margin-bottom:8px}
.howto-step p{color:var(--text-muted);font-size:.9rem}
.community-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px}
.community-card{background:var(--bg-card);border-radius:var(--radius);padding:28px 20px;text-align:center;border:1px solid var(--border-color);transition:var(--tr)}
.community-card:hover{border-color:var(--accent);transform:translateY(-4px)}
.community-icon{font-size:2.2rem;margin-bottom:14px}
.community-card h3{font-size:1rem;color:var(--text-white);margin-bottom:8px}
.community-card p{color:var(--text-muted);font-size:.85rem}
.share-bar{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;padding:20px 0}
.share-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 22px;border-radius:50px;font-size:.9rem;font-weight:500;border:1px solid var(--border-color);background:var(--bg-card);color:var(--text-light);cursor:pointer;transition:var(--tr)}
.share-btn:hover{border-color:var(--secondary);background:rgba(255,107,53,.1);color:var(--secondary)}
.site-footer{background:var(--primary);border-top:1px solid var(--border-color);padding:50px 0 30px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:30px;margin-bottom:30px}
.footer-col h3{font-size:1.05rem;color:var(--text-white);margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid var(--secondary);display:inline-block}
.footer-col p,.footer-col a{color:var(--text-muted);font-size:.9rem;line-height:2;display:block}
.footer-col a:hover{color:var(--secondary)}
.footer-qr{display:flex;gap:16px}
.footer-qr-item{text-align:center}
.footer-qr-item img{width:110px;height:110px;border-radius:var(--radius-sm);margin-bottom:6px}
.footer-qr-item span{font-size:.8rem;color:var(--text-muted)}
.footer-bottom{text-align:center;padding-top:24px;border-top:1px solid var(--border-color);color:var(--text-muted);font-size:.85rem}
.footer-bottom a{color:var(--secondary)}
.breadcrumb{padding:16px 0;margin-top:70px}
.breadcrumb-list{display:flex;align-items:center;gap:8px;font-size:.88rem;color:var(--text-muted)}
.breadcrumb-list a{color:var(--text-muted)}
.breadcrumb-list a:hover{color:var(--secondary)}
.breadcrumb-list .separator{color:var(--border-color)}
.breadcrumb-list .current{color:var(--secondary)}
.page-hero{padding:100px 0 40px;text-align:center;background:linear-gradient(135deg,#1a0a2e,#0d0d1a);border-bottom:1px solid var(--border-color)}
.page-hero h1{font-size:2.2rem;color:var(--text-white);margin-bottom:12px}
.page-hero p{color:var(--text-muted);font-size:1.05rem}
.page-content{padding:50px 0}
.mcp-widget{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius);padding:20px;margin-top:20px}
.mcp-widget .mcp-status{display:flex;align-items:center;gap:8px;font-size:.88rem;color:var(--accent)}
.mcp-widget .mcp-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);animation:mcpPulse 2s infinite}
@keyframes mcpPulse{0%,100%{opacity:1}50%{opacity:.4}}
.back-to-top{position:fixed;bottom:30px;right:30px;width:48px;height:48px;background:var(--gradient-accent);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.2rem;cursor:pointer;opacity:0;visibility:hidden;transition:var(--tr);z-index:999;border:none;box-shadow:0 4px 16px rgba(255,107,53,.3)}
.back-to-top.visible{opacity:1;visibility:visible}
.back-to-top:hover{transform:translateY(-4px)}
.stats-bar{display:flex;justify-content:center;gap:40px;flex-wrap:wrap;padding:30px 0}
.stat-item{text-align:center}
.stat-num{font-size:2.2rem;font-weight:800;color:var(--secondary);line-height:1.2}
.stat-label{font-size:.88rem;color:var(--text-muted);margin-top:4px}
.ai-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.ai-card{background:var(--bg-card);border-radius:var(--radius);padding:28px 24px;border:1px solid var(--border-color);transition:var(--tr)}
.ai-card:hover{border-color:var(--accent);box-shadow:0 8px 30px rgba(0,212,170,.1)}
.ai-card h3{font-size:1.1rem;color:var(--text-white);margin-bottom:10px;display:flex;align-items:center;gap:10px}
.ai-card p{color:var(--text-muted);font-size:.9rem;line-height:1.7}
.lazy-img{opacity:0;transition:opacity .5s ease}
.lazy-img.loaded{opacity:1}
.fade-in{opacity:0;transform:translateY(30px);transition:opacity .6s ease,transform .6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}
@media(max-width:1024px){.hero-content h1{font-size:2.2rem}.video-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}}
@media(max-width:768px){.main-nav{display:none;position:fixed;top:70px;left:0;width:100%;background:rgba(13,13,26,.98);flex-direction:column;padding:20px;gap:4px;border-bottom:1px solid var(--border-color)}.main-nav.open{display:flex}.main-nav a{padding:12px 16px;width:100%}.mobile-menu-btn{display:flex}.hero-content h1{font-size:1.8rem}.hero-content h2{font-size:1.05rem}.section-header h2{font-size:1.6rem}.section{padding:50px 0}.video-grid,.expert-grid,.footer-grid,.contact-grid{grid-template-columns:1fr}.hero-btns{flex-direction:column;align-items:center}.community-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){html{font-size:14px}.hero-content h1{font-size:1.5rem}.community-grid,.howto-steps,.review-grid{grid-template-columns:1fr}}