/* ========================================
   91Ai原创漫画 - 主样式表
   品牌色: #0066FF(主蓝) #FF0066(品红) #1a1a2e(深底)
   ======================================== */

/* CSS Reset & Base */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
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:#e0e0e0;background:#0d0d1a;line-height:1.7;overflow-x:hidden}
a{color:#4da6ff;text-decoration:none;transition:color .3s}
a:hover{color:#ff4d94}
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:#fff}

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

/* ========== Header ========== */
.site-header{background:linear-gradient(135deg,#0d0d1a 0%,#1a1a3e 100%);border-bottom:2px solid rgba(0,102,255,.3);position:sticky;top:0;z-index:1000;backdrop-filter:blur(10px)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 0;flex-wrap:wrap}
.brand-logo{display:flex;align-items:center;gap:10px}
.brand-logo img{height:50px;width:auto}
.brand-logo span{font-size:1.1rem;font-weight:700;background:linear-gradient(90deg,#0066FF,#FF0066);-webkit-background-clip:text;-webkit-text-fill-color:transparent;white-space:nowrap}

/* Navigation */
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{padding:12px 16px;font-size:.9rem;color:#ccc;transition:all .3s;position:relative;white-space:nowrap}
.main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(0,102,255,.15)}
.main-nav a::after{content:'';position:absolute;bottom:0;left:50%;width:0;height:2px;background:linear-gradient(90deg,#0066FF,#FF0066);transition:all .3s;transform:translateX(-50%)}
.main-nav a:hover::after,.main-nav a.active::after{width:80%}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer;padding:10px}

/* Search Bar */
.search-bar{background:rgba(255,255,255,.05);padding:12px 0;border-bottom:1px solid rgba(255,255,255,.05)}
.search-form{display:flex;max-width:600px;margin:0 auto}
.search-form input{flex:1;padding:10px 18px;border:2px solid rgba(0,102,255,.3);border-right:none;border-radius:25px 0 0 25px;background:rgba(255,255,255,.08);color:#fff;font-size:.95rem;outline:none;transition:border-color .3s}
.search-form input:focus{border-color:#0066FF}
.search-form input::placeholder{color:#888}
.search-form button{padding:10px 24px;border:2px solid #0066FF;border-radius:0 25px 25px 0;background:linear-gradient(135deg,#0066FF,#0044cc);color:#fff;cursor:pointer;font-size:.95rem;transition:all .3s}
.search-form button:hover{background:linear-gradient(135deg,#0077ff,#0055dd)}

/* Breadcrumb */
.breadcrumb{padding:12px 0;font-size:.85rem;color:#888}
.breadcrumb a{color:#4da6ff}
.breadcrumb span{margin:0 6px;color:#555}

/* ========== Hero Section ========== */
.hero-section{position:relative;overflow:hidden;padding:60px 0;background:linear-gradient(135deg,#0d0d2a 0%,#1a0a2e 50%,#0d1a2e 100%)}
.hero-section::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:url('../images/banners/hero-banner.jpg') center/cover no-repeat;opacity:.25}
.hero-content{position:relative;z-index:2;text-align:center;max-width:800px;margin:0 auto}
.hero-content h1{font-size:2.4rem;margin-bottom:16px;background:linear-gradient(90deg,#fff,#4da6ff,#ff4d94);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-content p{font-size:1.1rem;color:#bbb;margin-bottom:24px}
.hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px}
.hero-tags span{padding:6px 16px;border-radius:20px;font-size:.85rem;background:rgba(0,102,255,.15);border:1px solid rgba(0,102,255,.3);color:#4da6ff}

/* ========== Section Common ========== */
.section{padding:50px 0}
.section-title{text-align:center;margin-bottom:36px}
.section-title h2{font-size:1.8rem;margin-bottom:8px;position:relative;display:inline-block}
.section-title h2::after{content:'';display:block;width:60px;height:3px;background:linear-gradient(90deg,#0066FF,#FF0066);margin:10px auto 0}
.section-title p{color:#999;font-size:.95rem;margin-top:8px}
.section-alt{background:rgba(255,255,255,.02)}

/* ========== Video Card Grid ========== */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:rgba(255,255,255,.04);border-radius:12px;overflow:hidden;transition:transform .3s,box-shadow .3s;border:1px solid rgba(255,255,255,.06)}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(0,102,255,.15)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#111}
.video-thumb img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb img{transform:scale(1.05)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:56px;height:56px;background:rgba(0,102,255,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;cursor:pointer}
.play-btn::after{content:'';border-left:18px solid #fff;border-top:11px solid transparent;border-bottom:11px solid transparent;margin-left:4px}
.video-card:hover .play-btn{opacity:1}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.8);color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem}
.video-info{padding:14px}
.video-info h3{font-size:.95rem;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;color:#e0e0e0}
.video-info h3 a{color:#e0e0e0}
.video-info h3 a:hover{color:#4da6ff}
.video-meta{display:flex;align-items:center;gap:12px;font-size:.8rem;color:#888;flex-wrap:wrap}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.video-tags a{font-size:.75rem;padding:2px 10px;border-radius:12px;background:rgba(0,102,255,.1);color:#4da6ff;border:1px solid rgba(0,102,255,.2)}

/* ========== Comic Card ========== */
.comic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:20px}
.comic-card{border-radius:12px;overflow:hidden;transition:transform .3s;position:relative}
.comic-card:hover{transform:translateY(-5px)}
.comic-card img{width:100%;aspect-ratio:3/4;object-fit:cover;border-radius:12px}
.comic-card .comic-label{position:absolute;bottom:0;left:0;right:0;padding:12px;background:linear-gradient(transparent,rgba(0,0,0,.85));border-radius:0 0 12px 12px}
.comic-card .comic-label h4{font-size:.9rem;color:#fff;margin-bottom:4px}
.comic-card .comic-label span{font-size:.75rem;color:#aaa}

/* ========== Expert Section ========== */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.expert-card{background:rgba(255,255,255,.04);border-radius:12px;padding:24px;text-align:center;border:1px solid rgba(255,255,255,.06);transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-card img{width:100px;height:100px;border-radius:50%;object-fit:cover;margin:0 auto 14px;border:3px solid rgba(0,102,255,.3)}
.expert-card h4{font-size:1rem;margin-bottom:4px}
.expert-card .expert-title{color:#4da6ff;font-size:.85rem;margin-bottom:8px}
.expert-card p{font-size:.85rem;color:#999;margin-bottom:12px}
.expert-card .expert-btns{display:flex;gap:10px;justify-content:center}
.expert-card .expert-btns a{padding:6px 16px;border-radius:20px;font-size:.8rem;border:1px solid rgba(0,102,255,.3);color:#4da6ff;transition:all .3s}
.expert-card .expert-btns a:hover{background:rgba(0,102,255,.15)}

/* ========== FAQ Section ========== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid rgba(255,255,255,.08);border-radius:10px;margin-bottom:12px;overflow:hidden}
.faq-question{padding:16px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;background:rgba(255,255,255,.03);transition:background .3s;font-weight:600}
.faq-question:hover{background:rgba(0,102,255,.08)}
.faq-question::after{content:'+';font-size:1.3rem;color:#4da6ff;transition:transform .3s}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 20px;max-height:0;overflow:hidden;transition:all .3s;color:#bbb;font-size:.9rem;line-height:1.8}
.faq-item.active .faq-answer{padding:0 20px 16px;max-height:500px}

/* ========== Reviews ========== */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.review-card{background:rgba(255,255,255,.04);border-radius:12px;padding:20px;border:1px solid rgba(255,255,255,.06)}
.review-card .stars{color:#FFD700;margin-bottom:8px;font-size:1rem}
.review-card p{font-size:.9rem;color:#ccc;margin-bottom:10px;font-style:italic}
.review-card .reviewer{display:flex;align-items:center;gap:8px;font-size:.85rem;color:#999}
.review-card .reviewer strong{color:#e0e0e0}

/* ========== Partners ========== */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-wall .partner-item{background:rgba(255,255,255,.06);padding:16px 28px;border-radius:10px;font-size:.95rem;color:#bbb;font-weight:600;border:1px solid rgba(255,255,255,.08);transition:all .3s}
.partner-wall .partner-item:hover{background:rgba(0,102,255,.1);border-color:rgba(0,102,255,.3);color:#fff}

/* ========== How-To Guide ========== */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px;counter-reset:step}
.howto-step{background:rgba(255,255,255,.04);border-radius:12px;padding:24px;border:1px solid rgba(255,255,255,.06);counter-increment:step;position:relative}
.howto-step::before{content:counter(step);position:absolute;top:-12px;left:20px;width:32px;height:32px;background:linear-gradient(135deg,#0066FF,#FF0066);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;color:#fff}
.howto-step h4{margin-top:8px;margin-bottom:8px;font-size:1rem}
.howto-step p{font-size:.85rem;color:#bbb}

/* ========== Contact Section ========== */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}
.contact-card{background:rgba(255,255,255,.04);border-radius:12px;padding:20px;text-align:center;border:1px solid rgba(255,255,255,.06)}
.contact-card h4{margin-bottom:10px;font-size:1rem}
.contact-card p{font-size:.9rem;color:#bbb}
.contact-card .qr-img{width:140px;height:140px;margin:10px auto;border-radius:8px}

/* ========== Share Buttons ========== */
.share-bar{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;padding:20px 0}
.share-btn{padding:8px 20px;border-radius:20px;font-size:.85rem;color:#fff;cursor:pointer;border:none;transition:all .3s}
.share-btn.wechat{background:#07C160}
.share-btn.weibo{background:#E6162D}
.share-btn.douyin{background:#161823}
.share-btn.bilibili{background:#00A1D6}
.share-btn:hover{opacity:.85;transform:translateY(-2px)}

/* ========== Footer ========== */
.site-footer{background:linear-gradient(135deg,#0a0a1a 0%,#151530 100%);border-top:2px solid rgba(0,102,255,.2);padding:40px 0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:30px;margin-bottom:30px}
.footer-col h4{font-size:1rem;margin-bottom:14px;color:#fff}
.footer-col p,.footer-col a{font-size:.85rem;color:#999;display:block;margin-bottom:6px}
.footer-col a:hover{color:#4da6ff}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(255,255,255,.06);font-size:.8rem;color:#666}
.footer-bottom p{margin-bottom:4px}

/* ========== Responsive ========== */
@media(max-width:768px){
  .header-inner{flex-wrap:wrap}
  .main-nav{display:none;flex-direction:column;width:100%;background:#0d0d1a}
  .main-nav.open{display:flex}
  .nav-toggle{display:block}
  .hero-content h1{font-size:1.6rem}
  .hero-section{padding:40px 0}
  .section{padding:30px 0}
  .section-title h2{font-size:1.4rem}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
  .comic-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
  .search-form{margin:0 15px}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .hero-content h1{font-size:1.3rem}
  .main-nav a{padding:10px 16px;border-bottom:1px solid rgba(255,255,255,.05)}
}

/* ========== Animations ========== */
@keyframes fadeInUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.fade-in{animation:fadeInUp .6s ease forwards}

/* Lazy load placeholder */
.lazy{opacity:0;transition:opacity .5s}
.lazy.loaded{opacity:1}

/* AI Section */
.ai-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}
.ai-card{background:linear-gradient(135deg,rgba(0,102,255,.08),rgba(255,0,102,.05));border-radius:12px;padding:24px;border:1px solid rgba(0,102,255,.15);transition:transform .3s}
.ai-card:hover{transform:translateY(-4px)}
.ai-card h4{font-size:1rem;margin-bottom:8px;color:#4da6ff}
.ai-card p{font-size:.85rem;color:#bbb}

/* Community Section */
.community-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.community-item{background:rgba(255,255,255,.04);border-radius:10px;padding:18px;text-align:center;border:1px solid rgba(255,255,255,.06);transition:all .3s}
.community-item:hover{background:rgba(0,102,255,.08);border-color:rgba(0,102,255,.2)}
.community-item .icon{font-size:2rem;margin-bottom:8px}
.community-item h5{font-size:.9rem;margin-bottom:4px;color:#e0e0e0}
.community-item p{font-size:.8rem;color:#999}

/* Channel page specific */
.channel-hero{padding:40px 0;text-align:center;background:linear-gradient(135deg,rgba(0,102,255,.1),rgba(255,0,102,.05))}
.channel-hero h1{font-size:2rem;margin-bottom:10px}
.channel-hero p{color:#bbb;font-size:1rem}
.channel-desc{max-width:800px;margin:0 auto;padding:30px 0;font-size:.95rem;color:#ccc;line-height:1.9}