/* ========================================
   五一吃瓜网页登录入口 - 全站样式表
   品牌：五一吃瓜网页登录入口 | 域名：ct2012.com
   ======================================== */

/* CSS 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:#0a0a1a;line-height:1.7;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:color .3s}
a:hover{color:#a855f7}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ========== Header ========== */
.site-header{background:linear-gradient(135deg,#0f0c29,#302b63,#24243e);position:sticky;top:0;z-index:1000;box-shadow:0 2px 20px rgba(168,85,247,.3)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;max-width:1200px;margin:0 auto}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{height:42px;width:auto}
.logo-text{font-size:1.4rem;font-weight:700;background:linear-gradient(90deg,#a855f7,#ec4899);-webkit-background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:2px}
.main-nav{display:flex;gap:6px}
.main-nav a{color:#e2e8f0;padding:8px 16px;border-radius:8px;font-size:.95rem;transition:all .3s}
.main-nav a:hover,.main-nav a.active{background:rgba(168,85,247,.2);color:#c084fc}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:#fff;transition:.3s}

/* Search Bar */
.search-bar{background:rgba(255,255,255,.05);padding:12px 0;border-bottom:1px solid rgba(168,85,247,.15)}
.search-wrap{max-width:600px;margin:0 auto;display:flex;gap:8px;padding:0 20px}
.search-wrap input{flex:1;padding:10px 18px;border-radius:25px;border:1px solid rgba(168,85,247,.3);background:rgba(255,255,255,.08);color:#fff;font-size:.95rem;outline:none;transition:border-color .3s}
.search-wrap input:focus{border-color:#a855f7}
.search-wrap input::placeholder{color:#94a3b8}
.search-wrap button{padding:10px 24px;border-radius:25px;border:none;background:linear-gradient(135deg,#a855f7,#ec4899);color:#fff;cursor:pointer;font-size:.95rem;transition:transform .2s}
.search-wrap button:hover{transform:scale(1.05)}

/* ========== Hero Banner ========== */
.hero-section{position:relative;overflow:hidden;min-height:520px;display:flex;align-items:center}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;filter:brightness(.55)}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(15,12,41,.85),rgba(48,43,99,.6),rgba(36,36,62,.7));z-index:1}
.hero-content{position:relative;z-index:2;max-width:1200px;margin:0 auto;padding:80px 20px;text-align:center;color:#fff}
.hero-content h1{font-size:2.8rem;font-weight:800;margin-bottom:16px;text-shadow:0 2px 20px rgba(168,85,247,.5)}
.hero-content h1 span{background:linear-gradient(90deg,#a855f7,#ec4899,#f59e0b);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-content p{font-size:1.15rem;color:#cbd5e1;max-width:700px;margin:0 auto 30px;line-height:1.8}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{padding:14px 36px;border-radius:30px;background:linear-gradient(135deg,#a855f7,#ec4899);color:#fff;font-size:1rem;font-weight:600;border:none;cursor:pointer;transition:all .3s;box-shadow:0 4px 20px rgba(168,85,247,.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 30px rgba(168,85,247,.6)}
.btn-outline{padding:14px 36px;border-radius:30px;background:transparent;color:#fff;font-size:1rem;font-weight:600;border:2px solid rgba(168,85,247,.5);cursor:pointer;transition:all .3s}
.btn-outline:hover{background:rgba(168,85,247,.15);border-color:#a855f7}

/* ========== Section Common ========== */
.section{padding:70px 0}
.section-dark{background:#0f0f23}
.section-light{background:#13132b}
.section-title{text-align:center;margin-bottom:50px}
.section-title h2{font-size:2rem;font-weight:700;color:#fff;margin-bottom:12px}
.section-title h2 span{background:linear-gradient(90deg,#a855f7,#ec4899);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.section-title p{color:#94a3b8;font-size:1rem;max-width:600px;margin:0 auto}

/* Breadcrumb */
.breadcrumb{padding:16px 0;color:#94a3b8;font-size:.9rem}
.breadcrumb a{color:#a855f7}
.breadcrumb span{margin:0 8px;color:#64748b}

/* ========== Video Cards ========== */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:#1a1a35;border-radius:16px;overflow:hidden;transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(168,85,247,.25)}
.video-thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.video-thumb img{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;background:rgba(0,0,0,.4);opacity:0;transition:opacity .3s}
.video-card:hover .play-btn{opacity:1}
.play-btn svg{width:56px;height:56px;fill:#fff;filter:drop-shadow(0 2px 8px rgba(0,0,0,.5))}
.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}
.video-info{padding:16px}
.video-info h3{color:#e2e8f0;font-size:1rem;font-weight:600;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:16px;color:#64748b;font-size:.85rem}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tags{display:flex;gap:6px;margin-top:10px;flex-wrap:wrap}
.video-tags span{padding:3px 10px;border-radius:12px;background:rgba(168,85,247,.12);color:#c084fc;font-size:.78rem}

/* ========== Category Tabs ========== */
.cat-tabs{display:flex;gap:10px;justify-content:center;margin-bottom:36px;flex-wrap:wrap}
.cat-tabs a{padding:8px 22px;border-radius:20px;color:#94a3b8;border:1px solid rgba(168,85,247,.2);font-size:.9rem;transition:all .3s}
.cat-tabs a:hover,.cat-tabs a.active{background:linear-gradient(135deg,#a855f7,#ec4899);color:#fff;border-color:transparent}

/* ========== Expert Cards ========== */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.expert-card{background:#1a1a35;border-radius:16px;padding:30px 24px;text-align:center;transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-avatar{width:100px;height:100px;border-radius:50%;margin:0 auto 16px;overflow:hidden;border:3px solid rgba(168,85,247,.4)}
.expert-avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h4{color:#e2e8f0;font-size:1.1rem;margin-bottom:4px}
.expert-card .role{color:#a855f7;font-size:.9rem;margin-bottom:12px}
.expert-card p{color:#94a3b8;font-size:.88rem;line-height:1.6;margin-bottom:16px}
.expert-links{display:flex;gap:10px;justify-content:center}
.expert-links a{padding:6px 18px;border-radius:20px;font-size:.85rem;border:1px solid rgba(168,85,247,.3);color:#c084fc;transition:all .3s}
.expert-links a:hover{background:rgba(168,85,247,.2)}

/* ========== AI Section ========== */
.ai-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px}
.ai-card{background:linear-gradient(135deg,#1a1a35,#1e1e3f);border-radius:16px;padding:30px;border:1px solid rgba(168,85,247,.15);transition:all .3s}
.ai-card:hover{border-color:rgba(168,85,247,.4);box-shadow:0 8px 30px rgba(168,85,247,.15)}
.ai-icon{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,#a855f7,#ec4899);display:flex;align-items:center;justify-content:center;margin-bottom:18px;font-size:1.6rem}
.ai-card h3{color:#e2e8f0;font-size:1.15rem;margin-bottom:10px}
.ai-card p{color:#94a3b8;font-size:.92rem;line-height:1.7}

/* ========== Community Section ========== */
.community-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}
.community-item{background:#1a1a35;border-radius:14px;padding:24px;text-align:center;border:1px solid rgba(168,85,247,.1);transition:all .3s}
.community-item:hover{border-color:rgba(168,85,247,.3)}
.community-icon{font-size:2.2rem;margin-bottom:12px}
.community-item h4{color:#e2e8f0;font-size:1.05rem;margin-bottom:8px}
.community-item p{color:#94a3b8;font-size:.88rem}

/* ========== Reviews ========== */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.review-card{background:#1a1a35;border-radius:16px;padding:28px;border-left:4px solid #a855f7}
.review-stars{color:#f59e0b;margin-bottom:10px;font-size:1.1rem}
.review-card p{color:#cbd5e1;font-size:.95rem;line-height:1.7;margin-bottom:14px;font-style:italic}
.review-author{display:flex;align-items:center;gap:10px;color:#94a3b8;font-size:.88rem}
.review-author strong{color:#e2e8f0}

/* ========== Partners ========== */
.partner-wall{display:flex;gap:30px;justify-content:center;flex-wrap:wrap;align-items:center}
.partner-item{background:rgba(255,255,255,.06);padding:16px 28px;border-radius:12px;color:#94a3b8;font-size:1rem;font-weight:600;border:1px solid rgba(168,85,247,.1);transition:all .3s}
.partner-item:hover{border-color:rgba(168,85,247,.3);color:#e2e8f0}

/* ========== FAQ ========== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#1a1a35;border-radius:12px;margin-bottom:12px;overflow:hidden}
.faq-q{padding:18px 24px;color:#e2e8f0;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .3s}
.faq-q:hover{background:rgba(168,85,247,.08)}
.faq-q::after{content:"+";font-size:1.3rem;color:#a855f7;transition:transform .3s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:all .4s;color:#94a3b8;font-size:.93rem;line-height:1.7}
.faq-item.open .faq-a{padding:0 24px 18px;max-height:500px}

/* ========== Contact ========== */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.contact-card{background:#1a1a35;border-radius:14px;padding:28px;text-align:center}
.contact-card h4{color:#e2e8f0;font-size:1.1rem;margin-bottom:14px}
.contact-card p{color:#94a3b8;font-size:.92rem;line-height:1.8}
.contact-card .highlight{color:#a855f7;font-weight:600}

/* ========== Share Buttons ========== */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-btn{padding:10px 20px;border-radius:25px;color:#fff;font-size:.9rem;display:flex;align-items:center;gap:6px;transition:transform .2s}
.share-btn:hover{transform:scale(1.05)}
.share-wechat{background:#07c160}
.share-weibo{background:#e6162d}
.share-douyin{background:#161823}
.share-bilibili{background:#fb7299}

/* ========== Footer ========== */
.site-footer{background:linear-gradient(135deg,#0a0a1a,#1a1a35);border-top:1px solid rgba(168,85,247,.15);padding:50px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:30px;margin-bottom:40px}
.footer-col h4{color:#e2e8f0;font-size:1.05rem;margin-bottom:16px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:"";position:absolute;bottom:0;left:0;width:40px;height:2px;background:linear-gradient(90deg,#a855f7,#ec4899)}
.footer-col p,.footer-col a{color:#94a3b8;font-size:.9rem;line-height:2}
.footer-col a:hover{color:#c084fc}
.footer-qr{display:flex;gap:16px;margin-top:12px}
.footer-qr img{width:100px;height:100px;border-radius:8px;background:#fff;padding:4px}
.footer-bottom{border-top:1px solid rgba(168,85,247,.1);padding:20px 0;text-align:center;color:#64748b;font-size:.85rem}
.footer-bottom a{color:#a855f7}

/* ========== Page Header (Inner Pages) ========== */
.page-header{background:linear-gradient(135deg,#0f0c29,#302b63);padding:50px 0 40px;text-align:center}
.page-header h1{font-size:2.2rem;color:#fff;font-weight:700;margin-bottom:10px}
.page-header p{color:#94a3b8;font-size:1rem}

/* ========== Responsive ========== */
@media(max-width:768px){
  .header-inner{flex-wrap:wrap}
  .nav-toggle{display:flex}
  .main-nav{display:none;width:100%;flex-direction:column;padding-top:12px}
  .main-nav.open{display:flex}
  .main-nav a{padding:10px 16px}
  .hero-content h1{font-size:1.8rem}
  .hero-content p{font-size:1rem}
  .hero-btns{flex-direction:column;align-items:center}
  .section{padding:40px 0}
  .section-title h2{font-size:1.5rem}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
  .expert-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .page-header h1{font-size:1.6rem}
}
@media(max-width:480px){
  .hero-content h1{font-size:1.5rem}
  .video-grid{grid-template-columns:1fr}
  .search-wrap{flex-direction:column}
  .search-wrap button{width:100%}
}

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

/* ========== Loading Skeleton ========== */
.skeleton{background:linear-gradient(90deg,#1a1a35 25%,#252545 50%,#1a1a35 75%);background-size:200% 100%;animation:shimmer 1.5s infinite}
@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* ========== Live Badge ========== */
.live-badge{position:absolute;top:10px;left:10px;background:#ef4444;color:#fff;padding:3px 10px;border-radius:4px;font-size:.78rem;font-weight:600;display:flex;align-items:center;gap:4px;z-index:2}
.live-badge::before{content:"";width:6px;height:6px;border-radius:50%;background:#fff;animation:pulse 1.5s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}

/* ========== Tool Cards ========== */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.tool-card{background:#1a1a35;border-radius:16px;padding:28px;text-align:center;border:1px solid rgba(168,85,247,.1);transition:all .3s}
.tool-card:hover{border-color:#a855f7;transform:translateY(-4px)}
.tool-icon{font-size:2.5rem;margin-bottom:14px}
.tool-card h3{color:#e2e8f0;font-size:1.1rem;margin-bottom:8px}
.tool-card p{color:#94a3b8;font-size:.9rem;margin-bottom:16px}
.tool-card .btn-sm{padding:8px 20px;border-radius:20px;background:linear-gradient(135deg,#a855f7,#ec4899);color:#fff;font-size:.85rem;display:inline-block;transition:transform .2s}
.tool-card .btn-sm:hover{transform:scale(1.05)}

/* ========== Stats Bar ========== */
.stats-bar{display:flex;justify-content:center;gap:40px;flex-wrap:wrap;padding:30px 0}
.stat-item{text-align:center}
.stat-num{font-size:2rem;font-weight:700;background:linear-gradient(90deg,#a855f7,#ec4899);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.stat-label{color:#94a3b8;font-size:.9rem;margin-top:4px}