/* ============================================
   国产主播 - dvdedu.cn 赛博朋克电竞风格
   Design: Cyberpunk Esports Aesthetic
   Colors: #0a0e17 (bg), #00d4ff (primary), #ff6b35 (accent)
   ============================================ */

/* Reset & Base */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'Noto Sans SC',sans-serif;background:#0a0e17;color:#e0e6ed;line-height:1.7;overflow-x:hidden}
a{color:#00d4ff;text-decoration:none;transition:color .3s}
a:hover{color:#ff6b35}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3;color:#fff}
h1{font-size:2.5rem}
h2{font-size:2rem;margin-bottom:1rem}
h3{font-size:1.5rem}
h4{font-size:1.2rem}
p{margin-bottom:1rem;color:#b0b8c4}

/* Container */
.container{max-width:1280px;margin:0 auto;padding:0 1.5rem}

/* ============ HEADER ============ */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(10,14,23,0.95);backdrop-filter:blur(12px);border-bottom:1px solid rgba(0,212,255,0.15)}
.header-inner{max-width:1280px;margin:0 auto;padding:0 1.5rem;display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px}
.logo-icon{flex-shrink:0}
.logo-text{font-size:1.3rem;font-weight:900;color:#00d4ff;letter-spacing:2px}
.main-nav ul{display:flex;gap:4px}
.main-nav a{padding:8px 14px;font-size:.9rem;font-weight:500;color:#b0b8c4;border-radius:6px;transition:all .3s}
.main-nav a:hover{color:#00d4ff;background:rgba(0,212,255,0.08)}
.mobile-menu-btn{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.mobile-menu-btn span{width:24px;height:2px;background:#00d4ff;transition:all .3s}

/* Search Bar */
.search-bar{max-width:1280px;margin:0 auto;padding:8px 1.5rem}
.search-form{display:flex;max-width:600px;margin:0 auto}
.search-form input{flex:1;padding:10px 16px;background:#111827;border:1px solid rgba(0,212,255,0.2);border-right:none;border-radius:8px 0 0 8px;color:#e0e6ed;font-size:.95rem;outline:none;transition:border-color .3s}
.search-form input:focus{border-color:#00d4ff}
.search-form button{padding:10px 24px;background:linear-gradient(135deg,#00d4ff,#0099cc);border:none;border-radius:0 8px 8px 0;color:#0a0e17;font-weight:700;cursor:pointer;transition:all .3s;font-size:.95rem}
.search-form button:hover{background:linear-gradient(135deg,#00e5ff,#00aadd)}

/* ============ HERO BANNER ============ */
.hero-banner{position:relative;min-height:520px;display:flex;align-items:center;overflow:hidden;margin-top:110px}
.hero-banner .hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;z-index:0}
.hero-banner .hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(10,14,23,0.88) 0%,rgba(10,14,23,0.6) 50%,rgba(10,14,23,0.85) 100%)}
.hero-content{position:relative;z-index:2;max-width:1280px;margin:0 auto;padding:3rem 1.5rem}
.hero-content h1{font-size:3rem;font-weight:900;margin-bottom:1rem;text-shadow:0 0 30px rgba(0,212,255,0.3)}
.hero-content h1 .highlight{color:#00d4ff;position:relative}
.hero-content h1 .highlight::after{content:'';position:absolute;bottom:-4px;left:0;right:0;height:3px;background:linear-gradient(90deg,#00d4ff,#ff6b35);border-radius:2px}
.hero-content .hero-desc{font-size:1.15rem;color:#b0b8c4;max-width:680px;margin-bottom:2rem;line-height:1.8}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn-primary{display:inline-flex;align-items:center;gap:8px;padding:12px 32px;background:linear-gradient(135deg,#00d4ff,#0099cc);color:#0a0e17;font-weight:700;border-radius:8px;font-size:1rem;transition:all .3s;border:none;cursor:pointer}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(0,212,255,0.35);color:#0a0e17}
.btn-secondary{display:inline-flex;align-items:center;gap:8px;padding:12px 32px;background:transparent;color:#00d4ff;font-weight:700;border:2px solid #00d4ff;border-radius:8px;font-size:1rem;transition:all .3s;cursor:pointer}
.btn-secondary:hover{background:rgba(0,212,255,0.1);transform:translateY(-2px)}

/* ============ SECTIONS ============ */
.section{padding:4rem 0}
.section-dark{background:#0d1117}
.section-alt{background:linear-gradient(180deg,#0a0e17 0%,#0d1420 100%)}
.section-header{text-align:center;margin-bottom:3rem}
.section-header h2{position:relative;display:inline-block;padding-bottom:12px}
.section-header h2::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60px;height:3px;background:linear-gradient(90deg,#00d4ff,#ff6b35);border-radius:2px}
.section-header p{color:#8892a0;margin-top:12px;font-size:1.05rem}

/* ============ VIDEO CARDS ============ */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px;max-width:1280px;margin:0 auto;padding:0 1.5rem}
.video-card{background:#111827;border-radius:12px;overflow:hidden;border:1px solid rgba(0,212,255,0.08);transition:all .4s cubic-bezier(.25,.8,.25,1)}
.video-card.hover,.video-card:hover{transform:translateY(-6px);border-color:rgba(0,212,255,0.3);box-shadow:0 12px 40px rgba(0,212,255,0.12)}
.video-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;cursor:pointer}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .video-thumb img{transform:scale(1.08)}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,0.8);color:#fff;padding:2px 8px;border-radius:4px;font-size:.8rem;font-weight:500}
.video-play-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;background:rgba(10,14,23,0.4)}
.video-card:hover .video-play-overlay{opacity:1}
.video-tag{position:absolute;top:8px;left:8px;background:rgba(0,212,255,0.85);color:#0a0e17;padding:3px 10px;border-radius:4px;font-size:.75rem;font-weight:700}
.video-info{padding:16px}
.video-title{font-size:1rem;font-weight:600;color:#e0e6ed;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-stats{display:flex;gap:12px;font-size:.8rem;color:#6b7280}
.stat-item{display:flex;align-items:center;gap:4px}

/* ============ FEATURE CARDS ============ */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px;max-width:1280px;margin:0 auto;padding:0 1.5rem}
.feature-card{background:linear-gradient(145deg,#111827,#0d1420);border:1px solid rgba(0,212,255,0.1);border-radius:12px;padding:2rem;transition:all .4s}
.feature-card:hover{border-color:rgba(0,212,255,0.35);transform:translateY(-4px);box-shadow:0 8px 30px rgba(0,212,255,0.1)}
.feature-card .icon{width:56px;height:56px;background:linear-gradient(135deg,rgba(0,212,255,0.15),rgba(255,107,53,0.1));border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:1rem;font-size:1.5rem}
.feature-card h3{font-size:1.15rem;margin-bottom:.75rem;color:#e0e6ed}
.feature-card p{font-size:.9rem;color:#8892a0;line-height:1.6}

/* ============ EXPERT CARDS ============ */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px;max-width:1280px;margin:0 auto;padding:0 1.5rem}
.expert-card{background:#111827;border:1px solid rgba(0,212,255,0.08);border-radius:12px;padding:1.5rem;text-align:center;transition:all .4s}
.expert-card:hover{border-color:rgba(0,212,255,0.3);transform:translateY(-4px)}
.expert-avatar{width:80px;height:80px;border-radius:50%;background:linear-gradient(135deg,#00d4ff,#ff6b35);margin:0 auto 1rem;display:flex;align-items:center;justify-content:center;font-size:2rem;color:#0a0e17;font-weight:900}
.expert-card h3{font-size:1.1rem;margin-bottom:.5rem}
.expert-card .role{color:#00d4ff;font-size:.85rem;margin-bottom:.75rem}
.expert-card p{font-size:.85rem;color:#8892a0}
.expert-card .expert-btns{display:flex;gap:8px;justify-content:center;margin-top:1rem}
.expert-card .expert-btns a{padding:6px 16px;font-size:.8rem;border-radius:6px}

/* ============ FAQ ============ */
.faq-list{max-width:800px;margin:0 auto;padding:0 1.5rem}
.faq-item{border:1px solid rgba(0,212,255,0.1);border-radius:10px;margin-bottom:12px;overflow:hidden;background:#111827}
.faq-question{padding:16px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:#e0e6ed;transition:background .3s}
.faq-question:hover{background:rgba(0,212,255,0.05)}
.faq-question .arrow{transition:transform .3s;color:#00d4ff;font-size:1.2rem}
.faq-item.active .faq-question .arrow{transform:rotate(180deg)}
.faq-answer{padding:0 20px;max-height:0;overflow:hidden;transition:all .4s ease;color:#8892a0;font-size:.95rem;line-height:1.7}
.faq-item.active .faq-answer{padding:0 20px 16px;max-height:500px}

/* ============ REVIEWS ============ */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px;max-width:1280px;margin:0 auto;padding:0 1.5rem}
.review-card{background:#111827;border:1px solid rgba(0,212,255,0.08);border-radius:12px;padding:1.5rem;transition:all .3s}
.review-card:hover{border-color:rgba(0,212,255,0.2)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.review-avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#00d4ff,#8b5cf6);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1rem;flex-shrink:0}
.review-meta h4{font-size:.95rem;color:#e0e6ed;margin-bottom:2px}
.review-meta span{font-size:.8rem;color:#6b7280}
.review-stars{color:#ff6b35;font-size:.9rem;margin-bottom:8px}
.review-text{font-size:.9rem;color:#b0b8c4;line-height:1.7}

/* ============ BREADCRUMB ============ */
.breadcrumb{max-width:1280px;margin:0 auto;padding:1rem 1.5rem;font-size:.85rem;color:#6b7280;margin-top:110px}
.breadcrumb a{color:#00d4ff}
.breadcrumb span{margin:0 8px;color:#4b5563}

/* ============ PAGE CONTENT ============ */
.page-hero{position:relative;min-height:300px;display:flex;align-items:center;overflow:hidden}
.page-hero .hero-bg{position:absolute;inset:0;background-size:cover;background-position:center}
.page-hero .hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(10,14,23,0.9),rgba(10,14,23,0.7))}
.page-hero .hero-content{position:relative;z-index:2;max-width:1280px;margin:0 auto;padding:3rem 1.5rem;width:100%}
.page-content{max-width:1280px;margin:0 auto;padding:3rem 1.5rem}
.content-text{max-width:800px}
.content-text h2{margin-top:2rem;margin-bottom:1rem;color:#00d4ff}
.content-text p{margin-bottom:1.2rem;line-height:1.8}

/* ============ SIDEBAR VIDEOS ============ */
.sidebar-section{margin-top:3rem;padding:2rem;background:#111827;border-radius:12px;border:1px solid rgba(0,212,255,0.08)}
.sidebar-section h3{margin-bottom:1.5rem;color:#00d4ff}
.sidebar-video-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}

/* ============ FOOTER ============ */
.site-footer{background:#060810;border-top:1px solid rgba(0,212,255,0.1);padding-top:3rem}
.footer-inner{max-width:1280px;margin:0 auto;padding:0 1.5rem}
.footer-brand{margin-bottom:2rem}
.footer-brand .logo{margin-bottom:1rem}
.footer-desc{max-width:500px;font-size:.9rem;color:#6b7280;line-height:1.7}
.footer-links{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:2rem;margin-bottom:2rem}
.footer-col h4{color:#e0e6ed;margin-bottom:1rem;font-size:1rem}
.footer-col ul li{margin-bottom:.5rem}
.footer-col ul li a,.footer-col ul li{font-size:.9rem;color:#6b7280}
.footer-col ul li a:hover{color:#00d4ff}
.qrcode-box{display:flex;gap:16px}
.qrcode-item{text-align:center}
.qrcode-item span{display:block;margin-top:6px;font-size:.8rem;color:#6b7280}
.footer-share{margin-bottom:2rem;text-align:center}
.footer-share h4{margin-bottom:1rem;color:#e0e6ed}
.share-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.share-btn{padding:8px 20px;background:#111827;border:1px solid rgba(0,212,255,0.2);border-radius:6px;color:#b0b8c4;font-size:.85rem;transition:all .3s}
.share-btn:hover{border-color:#00d4ff;color:#00d4ff;background:rgba(0,212,255,0.05)}
.footer-bottom{text-align:center;padding:1.5rem 0;border-top:1px solid rgba(0,212,255,0.08);font-size:.85rem;color:#4b5563}

/* ============ JSON-LD INVISIBLE ============ */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

/* ============ RESPONSIVE ============ */
@media(max-width:768px){
  .main-nav{display:none;position:absolute;top:64px;left:0;right:0;background:rgba(10,14,23,0.98);padding:1rem;border-bottom:1px solid rgba(0,212,255,0.15)}
  .main-nav.active{display:block}
  .main-nav ul{flex-direction:column;gap:0}
  .main-nav a{display:block;padding:12px 16px;border-radius:8px}
  .mobile-menu-btn{display:flex}
  .hero-content h1{font-size:2rem}
  .hero-banner{min-height:400px;margin-top:120px}
  .breadcrumb{margin-top:120px}
  .video-grid{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .footer-links{grid-template-columns:1fr 1fr}
  h1{font-size:1.8rem}
  h2{font-size:1.5rem}
}

/* ============ ANIMATIONS ============ */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes glowPulse{0%,100%{box-shadow:0 0 5px rgba(0,212,255,0.3)}50%{box-shadow:0 0 20px rgba(0,212,255,0.6)}}
.animate-in{animation:fadeInUp .6s ease forwards;opacity:0}
.glow{animation:glowPulse 3s ease-in-out infinite}

/* ============ COMMUNITY TAGS ============ */
.community-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:1.5rem}
.community-tag{padding:8px 20px;background:rgba(0,212,255,0.08);border:1px solid rgba(0,212,255,0.15);border-radius:20px;color:#b0b8c4;font-size:.9rem;transition:all .3s}
.community-tag:hover{border-color:#00d4ff;color:#00d4ff;background:rgba(0,212,255,0.12)}

/* ============ PARTNER LOGOS ============ */
.partner-grid{display:flex;flex-wrap:wrap;gap:24px;justify-content:center;align-items:center;max-width:1280px;margin:0 auto;padding:0 1.5rem}
.partner-logo{width:120px;height:60px;background:#111827;border:1px solid rgba(0,212,255,0.1);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#4b5563;font-size:.8rem;transition:all .3s}
.partner-logo:hover{border-color:#00d4ff;color:#00d4ff}

/* ============ HOW-TO GUIDE ============ */
.howto-steps{max-width:800px;margin:0 auto;padding:0 1.5rem}
.howto-step{display:flex;gap:20px;margin-bottom:2rem;align-items:flex-start}
.step-number{width:48px;height:48px;background:linear-gradient(135deg,#00d4ff,#0099cc);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#0a0e17;font-weight:900;font-size:1.2rem;flex-shrink:0}
.step-content h3{margin-bottom:.5rem;color:#e0e6ed}
.step-content p{color:#8892a0;font-size:.95rem}

/* ============ CONTACT INFO ============ */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px;max-width:1280px;margin:0 auto;padding:0 1.5rem}
.contact-card{background:#111827;border:1px solid rgba(0,212,255,0.08);border-radius:12px;padding:2rem}
.contact-card h3{color:#00d4ff;margin-bottom:1rem}
.contact-card p{color:#8892a0;margin-bottom:.5rem;font-size:.95rem}

/* Neon accent line */
.neon-line{height:2px;background:linear-gradient(90deg,transparent,#00d4ff,#ff6b35,transparent);margin:3rem 0}