/* 四虎视频 - 原创样式表 */
/* 配色：活力红#E63946 深海蓝#1D3557 暖橙#F4A261 */

/* === 基础重置 === */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
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:#2B2D42;background:#F8F9FA;line-height:1.7;overflow-x:hidden}
a{color:#E63946;text-decoration:none;transition:color .2s}
a:hover{color:#c1121f}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* === Header === */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(11,17,32,.95);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.08)}
.header-inner{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:64px}
.logo-link{display:flex;align-items:center;gap:10px;text-decoration:none}
.logo-img{border-radius:50%;width:42px;height:42px}
.logo-info{display:flex;flex-direction:column}
.logo-text{color:#fff;font-size:20px;font-weight:700;letter-spacing:1px}
.logo-sub{color:#8D99AE;font-size:11px;letter-spacing:.5px}
.main-nav .nav-list{display:flex;gap:6px}
.main-nav .nav-list li a{color:#ccc;padding:8px 14px;border-radius:6px;font-size:14px;transition:all .2s}
.main-nav .nav-list li a:hover{color:#fff;background:rgba(230,57,70,.15)}
.header-actions{display:flex;align-items:center;gap:10px}
.search-toggle,.mobile-menu-btn{background:none;border:none;color:#ccc;cursor:pointer;padding:8px;border-radius:6px;transition:all .2s}
.search-toggle:hover{color:#fff;background:rgba(255,255,255,.1)}
.mobile-menu-btn{display:none;flex-direction:column;gap:4px}
.mobile-menu-btn span{display:block;width:20px;height:2px;background:#ccc;transition:all .3s}

/* 搜索覆盖层 */
.search-overlay{display:none;position:fixed;top:64px;left:0;width:100%;background:rgba(11,17,32,.98);padding:30px 20px;z-index:999;border-bottom:2px solid #E63946}
.search-overlay.active{display:block}
.search-box{max-width:700px;margin:0 auto;display:flex;gap:10px;position:relative}
.search-input{flex:1;padding:14px 20px;border:2px solid #1D3557;border-radius:10px;background:rgba(255,255,255,.05);color:#fff;font-size:16px;outline:none;transition:border-color .2s}
.search-input:focus{border-color:#E63946}
.search-input::placeholder{color:#8D99AE}
.search-btn{padding:14px 28px;background:linear-gradient(135deg,#E63946,#c1121f);color:#fff;border:none;border-radius:10px;font-size:15px;cursor:pointer;transition:transform .2s}
.search-btn:hover{transform:scale(1.03)}
.search-close{position:absolute;right:-40px;top:50%;transform:translateY(-50%);background:none;border:none;color:#8D99AE;font-size:24px;cursor:pointer}
.search-hot{max-width:700px;margin:15px auto 0;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.hot-label{color:#8D99AE;font-size:13px}
.search-hot a{color:#ccc;font-size:13px;padding:4px 12px;background:rgba(255,255,255,.06);border-radius:20px;transition:all .2s}
.search-hot a:hover{background:#E63946;color:#fff}

/* === Hero === */
.hero-section{position:relative;min-height:600px;display:flex;align-items:center;justify-content:center;background-size:cover;background-position:center;margin-top:64px;padding:80px 20px}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(11,17,32,.88),rgba(29,53,87,.75))}
.hero-content{position:relative;z-index:2;max-width:800px;text-align:center}
.hero-badge{display:inline-block;padding:6px 18px;background:rgba(230,57,70,.2);border:1px solid rgba(230,57,70,.4);border-radius:30px;color:#F4A261;font-size:13px;margin-bottom:20px}
.hero-title{color:#fff;font-size:42px;font-weight:800;line-height:1.3;margin-bottom:20px;text-shadow:0 2px 20px rgba(0,0,0,.3)}
.hero-desc{color:rgba(255,255,255,.8);font-size:16px;line-height:1.8;margin-bottom:30px}
.hero-btns{display:flex;gap:15px;justify-content:center;margin-bottom:40px}
.btn-primary{display:inline-block;padding:14px 32px;background:linear-gradient(135deg,#E63946,#c1121f);color:#fff;border-radius:10px;font-size:15px;font-weight:600;transition:all .3s;border:none;cursor:pointer}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(230,57,70,.4);color:#fff}
.btn-outline{display:inline-block;padding:14px 32px;border:2px solid rgba(255,255,255,.4);color:#fff;border-radius:10px;font-size:15px;font-weight:600;transition:all .3s}
.btn-outline:hover{border-color:#F4A261;color:#F4A261}
.hero-stats{display:flex;gap:40px;justify-content:center;flex-wrap:wrap}
.stat-item{text-align:center}
.stat-item strong{display:block;color:#F4A261;font-size:28px;font-weight:800}
.stat-item span{color:rgba(255,255,255,.6);font-size:13px}

/* === 面包屑 === */
.breadcrumb{background:#fff;padding:12px 0;border-bottom:1px solid #eee;font-size:13px;color:#8D99AE}
.breadcrumb a{color:#1D3557}
.breadcrumb .sep{margin:0 8px;color:#ccc}

/* === 通用Section === */
.section-block{padding:70px 0}
.section-block:nth-child(even){background:#fff}
.section-header{text-align:center;margin-bottom:45px}
.section-header h2{font-size:30px;font-weight:800;color:#1D3557;margin-bottom:12px;position:relative;display:inline-block}
.section-header h2::after{content:'';position:absolute;bottom:-8px;left:50%;transform:translateX(-50%);width:50px;height:3px;background:linear-gradient(90deg,#E63946,#F4A261);border-radius:2px}
.section-header.light h2{color:#fff}
.section-header.light h2::after{background:linear-gradient(90deg,#F4A261,#E63946)}
.section-header.light .section-sub{color:rgba(255,255,255,.7)}
.section-sub{color:#8D99AE;font-size:15px;margin-top:15px;max-width:650px;margin-left:auto;margin-right:auto}
.section-more{text-align:center;margin-top:35px}
.btn-more{display:inline-block;padding:12px 30px;border:2px solid #E63946;color:#E63946;border-radius:8px;font-size:14px;transition:all .2s}
.btn-more:hover{background:#E63946;color:#fff}

/* === 动漫视频卡片 === */
.anime-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 15px rgba(0,0,0,.06);transition:all .3s}
.video-card:hover{transform:translateY(-5px);box-shadow:0 12px 35px rgba(0,0,0,.12)}
.card-thumb{position:relative;overflow:hidden;aspect-ratio:16/9}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .card-thumb img{transform:scale(1.05)}
.play-overlay{position:absolute;inset:0;background:rgba(0,0,0,.3);display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s}
.video-card:hover .play-overlay{opacity:1}
.play-btn{width:56px;height:56px;background:rgba(230,57,70,.9);border-radius:50%;position:relative;cursor:pointer;transition:transform .2s}
.play-btn::after{content:'';position:absolute;left:22px;top:16px;border-style:solid;border-width:12px 0 12px 20px;border-color:transparent transparent transparent #fff}
.play-btn:hover{transform:scale(1.1)}
.card-duration{position:absolute;bottom:10px;right:10px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:12px}
.card-tag{position:absolute;top:10px;left:10px;background:linear-gradient(135deg,#E63946,#c1121f);color:#fff;padding:3px 10px;border-radius:4px;font-size:11px;font-weight:600}
.card-info{padding:16px}
.card-info h3{font-size:15px;font-weight:700;color:#1D3557;margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;gap:15px;font-size:12px;color:#8D99AE;margin-bottom:8px}
.card-tags{display:flex;gap:6px;flex-wrap:wrap}
.card-tags span{font-size:11px;color:#8D99AE;background:#f0f1f5;padding:2px 8px;border-radius:3px}

/* === 影视传媒 === */
.media-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.media-card{background:#fff;border-radius:12px;padding:30px;text-align:center;border:1px solid #eef0f5;transition:all .3s}
.media-card:hover{border-color:#E63946;box-shadow:0 8px 30px rgba(230,57,70,.1)}
.media-icon{font-size:36px;margin-bottom:15px}
.media-card h3{font-size:17px;color:#1D3557;margin-bottom:10px;font-weight:700}
.media-card p{font-size:14px;color:#8D99AE;line-height:1.7}

/* === AI赋能 === */
.ai-section{background:linear-gradient(135deg,#0B1120,#1D3557)!important}
.ai-section .section-header h2{color:#fff}
.ai-section .section-sub{color:rgba(255,255,255,.6)}
.ai-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:25px}
.ai-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:35px;transition:all .3s}
.ai-card:hover{background:rgba(255,255,255,.08);border-color:rgba(230,57,70,.4)}
.ai-num{font-size:40px;font-weight:900;color:rgba(230,57,70,.3);margin-bottom:10px;font-family:Georgia,serif}
.ai-card h3{color:#F4A261;font-size:18px;margin-bottom:12px;font-weight:700}
.ai-card p{color:rgba(255,255,255,.65);font-size:14px;line-height:1.8}

/* === 社区 === */
.community-section{position:relative;background-size:cover;background-position:center}
.community-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(11,17,32,.92),rgba(29,53,87,.88))}
.community-content{position:relative;z-index:2}
.community-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:30px}
.comm-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:28px;transition:all .3s}
.comm-card:hover{background:rgba(255,255,255,.1);border-color:#F4A261}
.comm-card h3{color:#fff;font-size:16px;margin-bottom:10px}
.comm-card p{color:rgba(255,255,255,.6);font-size:14px;line-height:1.7}

/* === 专家 === */
.expert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.expert-card{background:#fff;border-radius:14px;padding:30px;text-align:center;border:1px solid #eef0f5;transition:all .3s}
.expert-card:hover{box-shadow:0 10px 35px rgba(0,0,0,.08)}
.expert-avatar{width:120px;height:120px;border-radius:50%;margin:0 auto 18px;object-fit:cover;border:3px solid #eef0f5}
.expert-card h3{font-size:20px;color:#1D3557;font-weight:700;margin-bottom:5px}
.expert-role{color:#E63946;font-size:14px;margin-bottom:12px;font-weight:600}
.expert-bio{font-size:13px;color:#8D99AE;line-height:1.7;margin-bottom:15px}
.expert-tags{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;margin-bottom:18px}
.expert-tags span{font-size:11px;color:#1D3557;background:#eef3ff;padding:3px 10px;border-radius:20px}
.expert-actions{display:flex;gap:10px;justify-content:center}
.btn-sm{padding:8px 18px;background:#E63946;color:#fff;border-radius:6px;font-size:13px;transition:all .2s}
.btn-sm:hover{background:#c1121f;color:#fff}
.btn-sm-outline{padding:8px 18px;border:1px solid #1D3557;color:#1D3557;border-radius:6px;font-size:13px;transition:all .2s}
.btn-sm-outline:hover{background:#1D3557;color:#fff}

/* === 合作品牌 === */
.partner-wall{display:flex;flex-wrap:wrap;gap:15px;justify-content:center}
.partner-item{padding:16px 30px;background:#fff;border:1px solid #eef0f5;border-radius:10px;font-size:15px;color:#1D3557;font-weight:600;transition:all .2s}
.partner-item:hover{border-color:#E63946;color:#E63946;box-shadow:0 4px 15px rgba(230,57,70,.1)}

/* === 加入指南 === */
.guide-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step-card{background:#fff;border-radius:12px;padding:30px;text-align:center;border:1px solid #eef0f5;position:relative}
.step-num{width:48px;height:48px;background:linear-gradient(135deg,#E63946,#c1121f);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:800;margin:0 auto 18px}
.step-card h3{font-size:16px;color:#1D3557;margin-bottom:10px;font-weight:700}
.step-card p{font-size:13px;color:#8D99AE;line-height:1.7}

/* === 用户评论 === */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review-card{background:#fff;border-radius:12px;padding:25px;border:1px solid #eef0f5;transition:all .3s}
.review-card:hover{box-shadow:0 8px 25px rgba(0,0,0,.06)}
.review-stars{color:#F4A261;font-size:16px;margin-bottom:12px;letter-spacing:2px}
.review-text{font-size:14px;color:#2B2D42;line-height:1.8;margin-bottom:15px}
.review-author strong{display:block;color:#1D3557;font-size:14px}
.review-author span{color:#8D99AE;font-size:12px}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:10px;margin-bottom:12px;border:1px solid #eef0f5;overflow:hidden}
.faq-question{width:100%;padding:18px 50px 18px 22px;background:none;border:none;text-align:left;font-size:15px;font-weight:600;color:#1D3557;cursor:pointer;position:relative;transition:color .2s}
.faq-question::after{content:'+';position:absolute;right:22px;top:50%;transform:translateY(-50%);font-size:22px;color:#E63946;transition:transform .3s}
.faq-item.active .faq-question::after{transform:translateY(-50%) rotate(45deg)}
.faq-question:hover{color:#E63946}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease}
.faq-item.active .faq-answer{max-height:300px;padding:0 22px 18px}
.faq-answer span{font-size:14px;color:#8D99AE;line-height:1.8;display:block}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:25px}
.contact-card{background:#fff;border-radius:12px;padding:30px;border:1px solid #eef0f5}
.contact-card h3{font-size:18px;color:#1D3557;margin-bottom:18px;font-weight:700;padding-bottom:12px;border-bottom:2px solid #E63946}
.contact-row{display:flex;padding:8px 0;font-size:14px;border-bottom:1px solid #f5f5f5}
.contact-label{color:#8D99AE;min-width:100px;flex-shrink:0}
.contact-row span:last-child{color:#2B2D42}

/* === Footer === */
.site-footer{background:#0B1120;color:#ccc}
.footer-top{padding:50px 0 30px}
.footer-inner{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;gap:40px;flex-wrap:wrap}
.footer-brand{flex:1;min-width:250px}
.footer-brand a{display:flex;align-items:center;gap:10px;margin-bottom:15px;text-decoration:none}
.footer-logo{width:40px;height:40px;border-radius:50%}
.footer-logo-text{color:#fff;font-size:20px;font-weight:700}
.footer-desc{font-size:13px;color:#8D99AE;line-height:1.7;margin-bottom:15px}
.footer-social{display:flex;gap:10px}
.footer-social a{width:36px;height:36px;background:rgba(255,255,255,.06);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#8D99AE;transition:all .2s}
.footer-social a:hover{background:#E63946;color:#fff}
.footer-links{display:flex;gap:40px;flex:2;flex-wrap:wrap}
.footer-col{min-width:130px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:15px;font-weight:700}
.footer-col ul li{margin-bottom:8px}
.footer-col ul li a{color:#8D99AE;font-size:13px;transition:color .2s}
.footer-col ul li a:hover{color:#F4A261}
.footer-qrcode{display:flex;gap:20px}
.qr-item{text-align:center}
.qr-item img{width:120px;height:120px;border-radius:8px;margin-bottom:6px}
.qr-item span{font-size:12px;color:#8D99AE}
.footer-bottom{border-top:1px solid rgba(255,255,255,.06);padding:20px 0;text-align:center}
.footer-bottom p{font-size:12px;color:#8D99AE;margin-bottom:4px}
.footer-contact{font-size:11px!important;color:#666!important}

/* === 分享浮窗 === */
.share-float{position:fixed;right:20px;bottom:80px;z-index:900}
.share-toggle{width:48px;height:48px;background:linear-gradient(135deg,#E63946,#c1121f);color:#fff;border:none;border-radius:50%;cursor:pointer;box-shadow:0 4px 15px rgba(230,57,70,.4);transition:transform .2s;display:flex;align-items:center;justify-content:center}
.share-toggle:hover{transform:scale(1.1)}
.share-list{display:none;position:absolute;bottom:56px;right:0;background:#fff;border-radius:10px;box-shadow:0 4px 20px rgba(0,0,0,.15);padding:8px;min-width:80px}
.share-list.active{display:block}
.share-list a{display:block;padding:8px 16px;color:#2B2D42;font-size:13px;border-radius:6px;transition:background .2s;white-space:nowrap}
.share-list a:hover{background:#f5f5f5}

/* === 内页通用 === */
.page-hero{background:linear-gradient(135deg,#0B1120,#1D3557);padding:100px 20px 50px;text-align:center;margin-top:64px}
.page-hero h1{color:#fff;font-size:34px;font-weight:800;margin-bottom:12px}
.page-hero p{color:rgba(255,255,255,.7);font-size:15px}
.page-content{padding:50px 0}
.page-content .container{max-width:900px}
.page-content h2{font-size:22px;color:#1D3557;margin:30px 0 15px;font-weight:700}
.page-content h3{font-size:18px;color:#1D3557;margin:25px 0 12px;font-weight:600}
.page-content p{font-size:15px;color:#2B2D42;line-height:1.9;margin-bottom:15px}
.page-content ul{padding-left:20px;margin-bottom:15px}
.page-content ul li{font-size:14px;color:#2B2D42;line-height:1.8;margin-bottom:6px;list-style:disc}
.content-card{background:#fff;border-radius:12px;padding:30px;margin-bottom:20px;border:1px solid #eef0f5}

/* === 响应式 === */
@media(max-width:1024px){
  .anime-grid,.media-grid,.community-grid,.expert-grid,.review-grid{grid-template-columns:repeat(2,1fr)}
  .ai-grid{grid-template-columns:1fr}
  .guide-steps{grid-template-columns:repeat(2,1fr)}
  .footer-inner{flex-direction:column}
  .footer-links{gap:25px}
}
@media(max-width:768px){
  .main-nav{display:none;position:fixed;top:64px;left:0;width:100%;background:rgba(11,17,32,.98);padding:20px;z-index:998}
  .main-nav.active{display:block}
  .main-nav .nav-list{flex-direction:column;gap:0}
  .main-nav .nav-list li a{display:block;padding:14px;border-bottom:1px solid rgba(255,255,255,.05);font-size:16px}
  .mobile-menu-btn{display:flex}
  .hero-title{font-size:28px}
  .hero-stats{gap:20px}
  .stat-item strong{font-size:22px}
  .anime-grid,.media-grid,.community-grid,.expert-grid,.review-grid,.contact-grid{grid-template-columns:1fr}
  .guide-steps{grid-template-columns:1fr}
  .section-header h2{font-size:24px}
  .section-block{padding:50px 0}
  .hero-section{min-height:500px;padding:60px 20px}
  .hero-btns{flex-direction:column;align-items:center}
  .footer-qrcode{justify-content:center}
  .search-close{right:0;top:-30px}
}
@media(max-width:480px){
  .hero-title{font-size:24px}
  .hero-desc{font-size:14px}
  .section-header h2{font-size:20px}
  .partner-wall{gap:8px}
  .partner-item{padding:10px 18px;font-size:13px}
}