/*
   黑丝 - 影视传媒与视频社区 主样式表
   品牌色系：珊瑚粉 #FF6B6B / 暖金 #F0A500 / 深蓝 #1A1A2E / 浅灰 #F5F5F5
*/
*{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:#FAFAFA;line-height:1.8}
a{color:#FF6B6B;text-decoration:none;transition:color .3s}
a:hover{color:#F0A500}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* 头部导航 */
.site-header{background:linear-gradient(135deg,#1A1A2E 0%,#16213E 100%);position:sticky;top:0;z-index:1000;box-shadow:0 2px 20px rgba(0,0,0,.3)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;max-width:1200px;margin:0 auto}
.logo-area{display:flex;align-items:center;gap:10px}
.logo-area img{height:45px;width:auto}
.logo-area .brand-text{color:#fff;font-size:1.4rem;font-weight:700;letter-spacing:1px}
.logo-area .brand-text span{color:#FF6B6B}
nav.main-nav{display:flex;align-items:center;gap:5px}
nav.main-nav a{color:#ddd;padding:8px 14px;border-radius:6px;font-size:.9rem;transition:all .3s;white-space:nowrap}
nav.main-nav a:hover,nav.main-nav a.active{background:rgba(255,107,107,.2);color:#FF6B6B}
.mobile-menu-btn{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* 搜索框 */
.search-bar{background:linear-gradient(90deg,#16213E,#1A1A2E);padding:12px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;max-width:600px;width:100%}
.search-box input{flex:1;padding:10px 18px;border:2px solid #FF6B6B;border-right:none;border-radius:25px 0 0 25px;font-size:.95rem;outline:none;background:#fff}
.search-box button{padding:10px 25px;background:linear-gradient(135deg,#FF6B6B,#F0A500);color:#fff;border:none;border-radius:0 25px 25px 0;cursor:pointer;font-size:.95rem;font-weight:600;transition:opacity .3s}
.search-box button:hover{opacity:.85}

/* Banner */
.hero-banner{position:relative;overflow:hidden;height:480px}
.hero-banner img{width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(to bottom,rgba(26,26,46,.6),rgba(26,26,46,.85));display:flex;align-items:center;justify-content:center;text-align:center;padding:20px}
.hero-content h1{color:#fff;font-size:2.6rem;margin-bottom:15px;text-shadow:2px 2px 8px rgba(0,0,0,.5)}
.hero-content h1 span{color:#FF6B6B}
.hero-content p{color:#ddd;font-size:1.15rem;max-width:700px;margin:0 auto 25px;line-height:1.9}
.hero-content .cta-btn{display:inline-block;padding:14px 40px;background:linear-gradient(135deg,#FF6B6B,#F0A500);color:#fff;border-radius:30px;font-size:1.1rem;font-weight:600;transition:transform .3s,box-shadow .3s}
.hero-content .cta-btn:hover{transform:translateY(-3px);box-shadow:0 8px 25px rgba(255,107,107,.4);color:#fff}

/* 通用区块 */
.section{padding:60px 0}
.section-alt{background:#fff}
.section-dark{background:#1A1A2E;color:#fff}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:2rem;color:#1A1A2E;margin-bottom:8px;position:relative;display:inline-block}
.section-title h2::after{content:"";position:absolute;bottom:-8px;left:50%;transform:translateX(-50%);width:60px;height:3px;background:linear-gradient(90deg,#FF6B6B,#F0A500);border-radius:2px}
.section-dark .section-title h2{color:#fff}
.section-title p{color:#777;font-size:1rem;margin-top:15px}
.section-dark .section-title p{color:#aaa}

/* 视频卡片网格 */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:25px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-5px);box-shadow:0 12px 35px rgba(0,0,0,.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(1.05)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;background:rgba(255,107,107,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s,transform .3s}
.video-card:hover .play-btn{opacity:1;transform:translate(-50%,-50%) scale(1.1)}
.play-btn::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:.8rem}
.video-info{padding:15px}
.video-info h3{font-size:1rem;color:#1A1A2E;margin-bottom:8px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:12px;color:#999;font-size:.82rem}
.video-meta span{display:flex;align-items:center;gap:3px}
.video-tag{display:inline-block;background:rgba(255,107,107,.1);color:#FF6B6B;padding:2px 8px;border-radius:10px;font-size:.75rem;margin-top:6px}

/* 栏目标签 */
.category-tabs{display:flex;justify-content:center;gap:10px;margin-bottom:30px;flex-wrap:wrap}
.category-tabs a{padding:8px 20px;border:2px solid #eee;border-radius:25px;color:#666;font-size:.9rem;transition:all .3s}
.category-tabs a:hover,.category-tabs a.active{border-color:#FF6B6B;color:#FF6B6B;background:rgba(255,107,107,.05)}

/* 专家卡片 */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:25px}
.expert-card{background:#fff;border-radius:12px;padding:30px 20px;text-align:center;box-shadow:0 4px 15px rgba(0,0,0,.08);transition:transform .3s}
.expert-card:hover{transform:translateY(-5px)}
.expert-card img{width:100px;height:100px;border-radius:50%;object-fit:cover;margin:0 auto 15px;border:3px solid #FF6B6B}
.expert-card h3{font-size:1.1rem;color:#1A1A2E;margin-bottom:5px}
.expert-card .title{color:#FF6B6B;font-size:.85rem;margin-bottom:10px}
.expert-card p{color:#777;font-size:.88rem;line-height:1.7}
.expert-card .expert-btns{margin-top:15px;display:flex;gap:8px;justify-content:center}
.expert-card .expert-btns a{padding:6px 16px;border-radius:20px;font-size:.82rem;border:1px solid #FF6B6B;color:#FF6B6B;transition:all .3s}
.expert-card .expert-btns a:hover{background:#FF6B6B;color:#fff}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:10px;margin-bottom:12px;box-shadow:0 2px 8px rgba(0,0,0,.05);overflow:hidden}
.faq-question{padding:18px 25px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:#1A1A2E;transition:background .3s}
.faq-question:hover{background:rgba(255,107,107,.05)}
.faq-question::after{content:"+";font-size:1.4rem;color:#FF6B6B;transition:transform .3s}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 25px;max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease;color:#666;line-height:1.8}
.faq-item.active .faq-answer{padding:0 25px 18px;max-height:500px}

/* 用户评论 */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}
.review-card{background:#fff;border-radius:12px;padding:25px;box-shadow:0 4px 15px rgba(0,0,0,.08)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.review-avatar{width:45px;height:45px;border-radius:50%;background:linear-gradient(135deg,#FF6B6B,#F0A500);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.1rem}
.review-name{font-weight:600;color:#1A1A2E}
.review-date{color:#999;font-size:.8rem}
.review-stars{color:#F0A500;margin-bottom:8px;font-size:.9rem}
.review-text{color:#555;font-size:.92rem;line-height:1.8}

/* 合作品牌 */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-wall .partner-item{background:#fff;padding:15px 25px;border-radius:10px;box-shadow:0 2px 8px rgba(0,0,0,.05);font-size:1rem;color:#555;font-weight:600;transition:transform .3s}
.partner-wall .partner-item:hover{transform:scale(1.05)}

/* 社区功能 */
.community-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:20px}
.community-item{background:#fff;border-radius:12px;padding:25px 15px;text-align:center;box-shadow:0 4px 15px rgba(0,0,0,.08);transition:transform .3s}
.community-item:hover{transform:translateY(-3px)}
.community-icon{font-size:2.5rem;margin-bottom:10px}
.community-item h4{color:#1A1A2E;font-size:1rem;margin-bottom:5px}
.community-item p{color:#777;font-size:.82rem}

/* AI赋能 */
.ai-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:25px}
.ai-card{background:linear-gradient(135deg,#1A1A2E,#16213E);border-radius:12px;padding:30px;color:#fff;transition:transform .3s}
.ai-card:hover{transform:translateY(-5px)}
.ai-card .ai-icon{font-size:2.5rem;margin-bottom:12px}
.ai-card h3{font-size:1.1rem;margin-bottom:8px;color:#FF6B6B}
.ai-card p{color:#aaa;font-size:.9rem;line-height:1.7}

/* 联系信息 */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:25px}
.contact-card{background:#fff;border-radius:12px;padding:25px;box-shadow:0 4px 15px rgba(0,0,0,.08)}
.contact-card h3{color:#1A1A2E;font-size:1.1rem;margin-bottom:15px;padding-bottom:10px;border-bottom:2px solid #FF6B6B}
.contact-card p{color:#666;font-size:.92rem;margin-bottom:8px;line-height:1.7}
.contact-card .qr-img{width:150px;height:150px;margin:10px auto;border-radius:8px}

/* 分享按钮 */
.share-bar{display:flex;justify-content:center;gap:12px;padding:20px 0}
.share-btn{padding:8px 20px;border-radius:20px;color:#fff;font-size:.85rem;transition:opacity .3s;cursor:pointer}
.share-btn:hover{opacity:.85;color:#fff}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#000}
.share-bilibili{background:#00A1D6}

/* 面包屑 */
.breadcrumb{padding:15px 0;color:#999;font-size:.85rem}
.breadcrumb a{color:#FF6B6B}
.breadcrumb span{margin:0 8px;color:#ccc}

/* 视频播放页 */
.video-player-wrap{background:#000;border-radius:12px;overflow:hidden;margin-bottom:25px}
.video-player-wrap video{width:100%;max-height:600px}
.video-detail-info{background:#fff;border-radius:12px;padding:25px;box-shadow:0 4px 15px rgba(0,0,0,.08);margin-bottom:25px}
.video-detail-info h1{font-size:1.6rem;color:#1A1A2E;margin-bottom:12px}
.video-detail-meta{display:flex;gap:20px;color:#999;font-size:.9rem;margin-bottom:15px;flex-wrap:wrap}
.video-detail-desc{color:#555;line-height:1.9;font-size:.95rem}

/* 侧边栏推荐 */
.sidebar-recommend h3{font-size:1.2rem;color:#1A1A2E;margin-bottom:15px;padding-bottom:8px;border-bottom:2px solid #FF6B6B}
.sidebar-video{display:flex;gap:12px;margin-bottom:15px;cursor:pointer;transition:opacity .3s}
.sidebar-video:hover{opacity:.8}
.sidebar-video img{width:140px;height:80px;object-fit:cover;border-radius:6px;flex-shrink:0}
.sidebar-video-info h4{font-size:.88rem;color:#1A1A2E;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sidebar-video-info p{color:#999;font-size:.78rem;margin-top:4px}

/* 页脚 */
.site-footer{background:#1A1A2E;color:#aaa;padding:50px 0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;margin-bottom:30px}
.footer-col h4{color:#fff;font-size:1rem;margin-bottom:15px;position:relative;padding-bottom:8px}
.footer-col h4::after{content:"";position:absolute;bottom:0;left:0;width:30px;height:2px;background:#FF6B6B}
.footer-col p,.footer-col a{color:#aaa;font-size:.88rem;line-height:2;display:block}
.footer-col a:hover{color:#FF6B6B}
.footer-col .footer-logo{height:40px;margin-bottom:10px}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);font-size:.82rem;color:#777}
.footer-qr{display:flex;gap:20px;margin-top:10px}
.footer-qr img{width:100px;height:100px;border-radius:6px}
.footer-qr p{font-size:.78rem;text-align:center;margin-top:5px}

/* 内页布局 */
.page-layout{display:grid;grid-template-columns:1fr 320px;gap:30px;padding:30px 0}
.page-main{min-width:0}
.page-sidebar{min-width:0}

/* 干扰标签隐藏 */
.drt{position:absolute;width:0;height:0;overflow:hidden;opacity:0;pointer-events:none;z-index:-9999}

/* 响应式 */
@media(max-width:768px){
  .header-inner{flex-wrap:wrap}
  .mobile-menu-btn{display:block}
  nav.main-nav{display:none;width:100%;flex-direction:column;padding:10px 0}
  nav.main-nav.show{display:flex}
  nav.main-nav a{padding:10px 15px;width:100%;text-align:center}
  .hero-banner{height:350px}
  .hero-content h1{font-size:1.8rem}
  .hero-content p{font-size:.95rem}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
  .page-layout{grid-template-columns:1fr}
  .page-sidebar{order:-1}
  .section{padding:40px 0}
  .section-title h2{font-size:1.5rem}
  .expert-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
  .hero-banner{height:280px}
  .hero-content h1{font-size:1.4rem}
  .video-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .community-grid{grid-template-columns:1fr 1fr}
}

/* 懒加载 */
img[data-src]{opacity:0;transition:opacity .5s}
img.loaded{opacity:1}