/* ============================================
   乐鱼体育 - 全站样式表
   品牌色: #0066FF(主蓝) #FF6600(橙) #1a1a2e(深底)
   ============================================ */

/* 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:#333;background:#f5f7fa;line-height:1.7;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:color .3s}
a:hover{color:#0066FF}
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 / Navigation ============ */
.site-header{background:#1a1a2e;position:sticky;top:0;z-index:1000;box-shadow:0 2px 12px rgba(0,0,0,.3)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:0 20px;max-width:1200px;margin:0 auto;height:68px}
.logo-link{display:flex;align-items:center;gap:10px}
.logo-link img{height:42px;width:auto}
.logo-text{color:#fff;font-size:20px;font-weight:700;letter-spacing:1px}
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{color:#ccd6e0;font-size:15px;padding:22px 16px;transition:all .3s;position:relative}
.main-nav a:hover,.main-nav a.active{color:#FF6600}
.main-nav a::after{content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:3px;background:#FF6600;transition:width .3s}
.main-nav a:hover::after,.main-nav a.active::after{width:60%}
.mobile-menu-btn{display:none;background:none;border:none;color:#fff;font-size:26px;cursor:pointer}

/* Search Bar */
.search-bar{background:#151528;padding:10px 0;border-bottom:1px solid #2a2a4a}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;max-width:560px;width:100%}
.search-box input{flex:1;padding:10px 18px;border:2px solid #0066FF;border-right:none;border-radius:25px 0 0 25px;background:#1a1a2e;color:#fff;font-size:14px;outline:none}
.search-box input::placeholder{color:#667}
.search-box button{padding:10px 24px;background:linear-gradient(135deg,#0066FF,#0044cc);color:#fff;border:2px solid #0066FF;border-radius:0 25px 25px 0;cursor:pointer;font-size:14px;transition:background .3s}
.search-box button:hover{background:linear-gradient(135deg,#0055dd,#0033aa)}

/* ============ Banner ============ */
.hero-banner{position:relative;height:520px;overflow:hidden;background:#1a1a2e}
.hero-banner img{width:100%;height:100%;object-fit:cover;opacity:.7}
.hero-overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:20px;background:linear-gradient(180deg,rgba(26,26,46,.3) 0%,rgba(26,26,46,.8) 100%)}
.hero-overlay h1{color:#fff;font-size:42px;margin-bottom:16px;text-shadow:0 2px 8px rgba(0,0,0,.5)}
.hero-overlay h1 span{color:#FF6600}
.hero-overlay p{color:#ccd6e0;font-size:18px;max-width:700px;line-height:1.8}
.hero-tags{display:flex;gap:12px;margin-top:20px;flex-wrap:wrap;justify-content:center}
.hero-tags span{background:rgba(0,102,255,.25);color:#6db3ff;padding:6px 16px;border-radius:20px;font-size:13px;border:1px solid rgba(0,102,255,.4)}

/* ============ Section Common ============ */
.section{padding:60px 0}
.section-dark{background:#1a1a2e;color:#fff}
.section-gray{background:#eef1f5}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:32px;color:#1a1a2e;margin-bottom:10px}
.section-dark .section-title h2{color:#fff}
.section-title p{color:#666;font-size:16px}
.section-dark .section-title p{color:#99a}
.section-title h2::after{content:"";display:block;width:60px;height:4px;background:linear-gradient(90deg,#0066FF,#FF6600);margin:12px auto 0;border-radius:2px}

/* ============ Video Cards Grid ============ */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 8px 30px rgba(0,102,255,.15)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden}
.video-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb img{transform:scale(1.08)}
.play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;background:rgba(0,0,0,.4)}
.video-card:hover .play-btn{opacity:1}
.play-btn span{width:56px;height:56px;background:rgba(255,102,0,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0}
.play-btn span::after{content:"";border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:3px}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:12px}
.video-info{padding:14px 16px}
.video-info h4{font-size:15px;color:#1a1a2e;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;justify-content:space-between;color:#999;font-size:12px}
.video-meta .views::before{content:"▶ "}
.video-meta .likes::before{content:"♥ "}
.video-tags{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.video-tags span{background:#eef3ff;color:#0066FF;padding:2px 10px;border-radius:12px;font-size:11px}
.video-date{display:block;color:#999;font-size:11px;margin-top:6px}
/* HTML5 video element inside card */
.card-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0;display:none}
.video-card:hover .card-video{display:block}
.video-thumb .thumb-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s;z-index:1}
.video-card:hover .thumb-img{z-index:0}

/* ============ Module Cards (游戏传媒/AI赋能) ============ */
.module-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.module-card{background:#fff;border-radius:12px;padding:30px 24px;text-align:center;box-shadow:0 4px 16px rgba(0,0,0,.06);transition:transform .3s,box-shadow .3s;border-top:4px solid transparent}
.module-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,102,255,.12);border-top-color:#0066FF}
.module-card .icon{font-size:40px;margin-bottom:16px;display:block}
.module-card h4{font-size:18px;color:#1a1a2e;margin-bottom:10px}
.module-card p{color:#666;font-size:14px;line-height:1.6}

/* ============ Community Section ============ */
.community-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.community-card{background:linear-gradient(135deg,#1e1e3f,#2a2a5a);border-radius:14px;padding:28px;text-align:center;transition:transform .3s;border:1px solid rgba(255,255,255,.08)}
.community-card:hover{transform:translateY(-4px)}
.community-card .emoji{font-size:48px;margin-bottom:14px;display:block}
.community-card h4{color:#fff;font-size:17px;margin-bottom:8px}
.community-card p{color:#99a;font-size:13px;line-height:1.6}
.community-card .member-count{color:#FF6600;font-size:13px;margin-top:10px;font-weight:600}

/* ============ Expert Section ============ */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:#fff;border-radius:14px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,.08);transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-avatar{width:100%;aspect-ratio:1;overflow:hidden}
.expert-avatar img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.expert-card:hover .expert-avatar img{transform:scale(1.05)}
.expert-info{padding:18px 16px;text-align:center}
.expert-info h4{font-size:17px;color:#1a1a2e;margin-bottom:4px}
.expert-info .role{color:#0066FF;font-size:13px;margin-bottom:8px;display:block}
.expert-info p{color:#666;font-size:13px;line-height:1.5}
.expert-info .awards{color:#FF6600;font-size:12px;margin-top:8px}
.expert-btns{display:flex;gap:8px;margin-top:12px;justify-content:center}
.expert-btns a{padding:6px 14px;border-radius:20px;font-size:12px;transition:all .3s}
.btn-primary{background:#0066FF;color:#fff}
.btn-primary:hover{background:#0055dd;color:#fff}
.btn-outline{border:1px solid #0066FF;color:#0066FF}
.btn-outline:hover{background:#0066FF;color:#fff}

/* ============ FAQ Section ============ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:10px;margin-bottom:12px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.faq-question{padding:18px 24px;font-size:16px;font-weight:600;color:#1a1a2e;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .3s}
.faq-question:hover{background:#f0f4ff}
.faq-question::after{content:"+";font-size:22px;color:#0066FF;transition:transform .3s}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s;color:#555;font-size:14px;line-height:1.8}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 18px}

/* ============ Reviews ============ */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.review-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 12px rgba(0,0,0,.06);border-left:4px solid #0066FF}
.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,#0066FF,#FF6600);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:18px}
.review-name{font-weight:600;color:#1a1a2e;font-size:15px}
.review-date{color:#999;font-size:12px}
.review-stars{color:#FF6600;font-size:14px;margin-bottom:8px;letter-spacing:2px}
.review-text{color:#555;font-size:14px;line-height:1.7}

/* ============ Contact Section ============ */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.contact-card{background:#fff;border-radius:12px;padding:28px;text-align:center;box-shadow:0 4px 12px rgba(0,0,0,.06)}
.contact-card .icon{font-size:36px;margin-bottom:12px;display:block}
.contact-card h4{font-size:17px;color:#1a1a2e;margin-bottom:10px}
.contact-card p{color:#666;font-size:14px;line-height:1.6}
.contact-card a{color:#0066FF;font-weight:600}

/* ============ How-To Guide ============ */
.howto-steps{display:flex;gap:20px;justify-content:center;flex-wrap:wrap}
.howto-step{background:#fff;border-radius:12px;padding:28px 24px;text-align:center;flex:1;min-width:200px;max-width:280px;box-shadow:0 4px 12px rgba(0,0,0,.06);position:relative}
.howto-step .step-num{width:40px;height:40px;background:linear-gradient(135deg,#0066FF,#0044cc);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px;margin:0 auto 14px}
.howto-step h4{font-size:16px;color:#1a1a2e;margin-bottom:8px}
.howto-step p{color:#666;font-size:13px;line-height:1.6}

/* ============ Share Buttons ============ */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}
.share-btn{padding:10px 20px;border-radius:25px;color:#fff;font-size:14px;cursor:pointer;transition:transform .2s,opacity .3s;border:none}
.share-btn:hover{transform:scale(1.05);opacity:.9}
.share-wechat{background:#07c160}
.share-weibo{background:#e6162d}
.share-douyin{background:#161823}
.share-bilibili{background:#00a1d6}

/* ============ Footer ============ */
.site-footer{background:#0d0d1a;color:#99a;padding:40px 0 0}
.footer-inner{display:grid;grid-template-columns:1fr 1fr 1fr;gap:30px;max-width:1200px;margin:0 auto;padding:0 20px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer-col p,.footer-col a{font-size:14px;line-height:2;color:#778}
.footer-col a:hover{color:#FF6600}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-logo img{height:36px}
.footer-logo span{color:#fff;font-size:18px;font-weight:700}
.footer-qr{display:flex;gap:16px;margin-top:16px}
.footer-qr img{width:100px;height:100px;border-radius:8px;border:2px solid #2a2a4a}
.footer-bottom{text-align:center;padding:20px;margin-top:30px;border-top:1px solid #1a1a3a;font-size:13px;color:#556}
.footer-bottom a{color:#0066FF}

/* ============ Breadcrumb ============ */
.breadcrumb{padding:14px 0;font-size:13px;color:#999}
.breadcrumb a{color:#0066FF}
.breadcrumb span{margin:0 6px;color:#ccc}

/* ============ Inner Page ============ */
.page-hero{background:linear-gradient(135deg,#1a1a2e,#0d0d1a);padding:50px 0;text-align:center}
.page-hero h1{color:#fff;font-size:34px;margin-bottom:10px}
.page-hero p{color:#99a;font-size:16px}
.content-section{padding:40px 0}
.content-section h2{font-size:26px;color:#1a1a2e;margin-bottom:16px}
.content-section h3{font-size:20px;color:#333;margin:20px 0 10px}
.content-section p{color:#555;font-size:15px;line-height:1.8;margin-bottom:14px}
.content-section ul{padding-left:20px;margin-bottom:14px}
.content-section ul li{color:#555;font-size:15px;line-height:2;position:relative;padding-left:16px}
.content-section ul li::before{content:"●";color:#0066FF;position:absolute;left:0;font-size:8px;top:6px}

/* ============ Partner Logos ============ */
.partner-wall{display:flex;gap:24px;justify-content:center;flex-wrap:wrap;align-items:center}
.partner-wall .partner-item{width:120px;height:60px;background:#f0f4ff;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:14px;color:#0066FF;font-weight:600;border:1px solid #dde5f0;transition:all .3s}
.partner-wall .partner-item:hover{background:#0066FF;color:#fff;border-color:#0066FF}

/* ============ Responsive ============ */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .header-inner{padding:0 15px}
  .main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:#1a1a2e;flex-direction:column;padding:10px 0;box-shadow:0 4px 12px rgba(0,0,0,.3)}
  .main-nav.open{display:flex}
  .main-nav a{padding:14px 20px;border-bottom:1px solid #2a2a4a}
  .mobile-menu-btn{display:block}
  .hero-banner{height:360px}
  .hero-overlay h1{font-size:28px}
  .hero-overlay p{font-size:15px}
  .video-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .module-grid{grid-template-columns:1fr}
  .community-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .section{padding:40px 0}
  .section-title h2{font-size:24px}
  .howto-steps{flex-direction:column;align-items:center}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .hero-banner{height:280px}
  .hero-overlay h1{font-size:22px}
}

/* ============ Policy Page ============ */
.policy-content{max-width:860px;margin:0 auto;padding:40px 20px}
.policy-content h2{font-size:24px;color:#1a1a2e;margin:30px 0 14px;border-bottom:2px solid #0066FF;padding-bottom:8px}
.policy-content h3{font-size:18px;color:#333;margin:20px 0 10px}
.policy-content p{color:#555;font-size:15px;line-height:1.8;margin-bottom:14px}
.policy-content ul{padding-left:20px;margin-bottom:14px}
.policy-content ul li{color:#555;font-size:15px;line-height:2;position:relative;padding-left:16px}
.policy-content ul li::before{content:"●";color:#0066FF;position:absolute;left:0;font-size:8px;top:6px}

/* ============ 404 Page ============ */
.error-page{text-align:center;padding:100px 20px}
.error-page h1{font-size:120px;color:#0066FF;margin-bottom:10px;line-height:1}
.error-page h2{font-size:28px;color:#1a1a2e;margin-bottom:16px}
.error-page p{color:#666;font-size:16px;margin-bottom:30px}
.error-page .btn-home{display:inline-block;padding:12px 30px;background:#0066FF;color:#fff;border-radius:25px;font-size:16px;transition:background .3s}
.error-page .btn-home:hover{background:#0055dd;color:#fff}

/* Lazy load placeholder */
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}