/* ============================================
   51动漫 修车改装视频社区 - 全站样式表
   品牌色系: 深灰 #1a1a2e | 红色 #e63946 | 银色 #a8b2d1
   ============================================ */

/* === 基础重置 === */
*,*::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:#e0e0e0;background:#0d0d1a;line-height:1.7;overflow-x:hidden}
a{color:#e63946;text-decoration:none;transition:color .3s}
a:hover{color:#ff6b6b}
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}

/* === 容器 === */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:60px 0}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:2rem;color:#fff;position:relative;display:inline-block;padding-bottom:12px}
.section-title h2::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60px;height:3px;background:linear-gradient(90deg,#e63946,#ff6b6b);border-radius:2px}
.section-title p{color:#a8b2d1;margin-top:10px;font-size:.95rem}

/* === 头部导航 === */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(13,13,26,.95);backdrop-filter:blur(10px);border-bottom:1px solid rgba(230,57,70,.15);transition:all .3s}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;gap:10px}
.logo img{height:45px;width:auto}
.logo span{font-size:1.5rem;font-weight:800;color:#fff;letter-spacing:1px}
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{padding:8px 16px;color:#a8b2d1;font-size:.9rem;transition:all .3s;position:relative}
.main-nav a:hover,.main-nav a.active{color:#e63946}
.main-nav a::after{content:'';position:absolute;bottom:0;left:50%;width:0;height:2px;background:#e63946;transition:all .3s;transform:translateX(-50%)}
.main-nav a:hover::after{width:60%}
.mobile-menu-btn{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:5px}
.mobile-menu-btn span{width:25px;height:2px;background:#fff;transition:all .3s}

/* === 搜索框 === */
.search-bar{background:rgba(26,26,46,.9);padding:12px 0;border-bottom:1px solid rgba(168,178,209,.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;background:rgba(255,255,255,.08);border:1px solid rgba(168,178,209,.2);border-right:none;border-radius:25px 0 0 25px;color:#fff;font-size:.9rem;outline:none;transition:border-color .3s}
.search-box input:focus{border-color:#e63946}
.search-box input::placeholder{color:#666}
.search-box button{padding:10px 24px;background:linear-gradient(135deg,#e63946,#c62828);color:#fff;border:none;border-radius:0 25px 25px 0;cursor:pointer;font-size:.9rem;transition:all .3s}
.search-box button:hover{background:linear-gradient(135deg,#ff6b6b,#e63946)}

/* === Banner区域 === */
.hero-banner{position:relative;height:85vh;min-height:500px;display:flex;align-items:center;justify-content:center;overflow:hidden;margin-top:70px}
.hero-banner .bg-image{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.4)}
.hero-banner .overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,13,26,.3) 0%,rgba(13,13,26,.8) 100%)}
.hero-content{position:relative;z-index:2;text-align:center;max-width:800px;padding:0 20px}
.hero-content h1{font-size:3.2rem;margin-bottom:16px;text-shadow:0 2px 20px rgba(0,0,0,.5)}
.hero-content h1 .brand{color:#e63946;font-size:3.8rem}
.hero-content p{font-size:1.15rem;color:#a8b2d1;margin-bottom:30px;line-height:1.8}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:30px;font-size:.95rem;font-weight:600;transition:all .3s;cursor:pointer;border:none}
.btn-primary{background:linear-gradient(135deg,#e63946,#c62828);color:#fff;box-shadow:0 4px 20px rgba(230,57,70,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 25px rgba(230,57,70,.5);color:#fff}
.btn-outline{border:2px solid #e63946;color:#e63946;background:transparent}
.btn-outline:hover{background:#e63946;color:#fff}

/* === 视频卡片网格 === */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:rgba(26,26,46,.6);border-radius:12px;overflow:hidden;transition:all .4s;border:1px solid rgba(168,178,209,.08);position:relative}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(230,57,70,.15);border-color:rgba(230,57,70,.3)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;cursor:pointer}
.video-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.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(230,57,70,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:all .3s;cursor:pointer}
.video-card:hover .play-btn{opacity:1}
.play-btn::after{content:'';width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:4px}
.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:16px}
.video-info h3{font-size:1rem;margin-bottom:8px;color:#fff;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;align-items:center;gap:12px;color:#666;font-size:.8rem}
.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{background:rgba(230,57,70,.12);color:#e63946;padding:2px 10px;border-radius:12px;font-size:.75rem}

/* === 专家展示 === */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.expert-card{background:rgba(26,26,46,.6);border-radius:12px;padding:30px 20px;text-align:center;border:1px solid rgba(168,178,209,.08);transition:all .4s}
.expert-card:hover{border-color:rgba(230,57,70,.3);transform:translateY(-4px)}
.expert-avatar{width:100px;height:100px;border-radius:50%;margin:0 auto 16px;overflow:hidden;border:3px solid #e63946}
.expert-avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h4{color:#fff;font-size:1.1rem;margin-bottom:4px}
.expert-card .role{color:#e63946;font-size:.85rem;margin-bottom:12px}
.expert-card p{color:#a8b2d1;font-size:.85rem;line-height:1.6;margin-bottom:16px}
.expert-links{display:flex;gap:10px;justify-content:center}
.expert-links a{padding:6px 16px;border:1px solid rgba(230,57,70,.4);border-radius:20px;color:#e63946;font-size:.8rem;transition:all .3s}
.expert-links a:hover{background:#e63946;color:#fff}

/* === FAQ区域 === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:rgba(26,26,46,.6);border-radius:10px;margin-bottom:12px;border:1px solid rgba(168,178,209,.08);overflow:hidden}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:#fff;font-weight:600;font-size:.95rem;transition:all .3s}
.faq-question:hover{color:#e63946}
.faq-question .arrow{transition:transform .3s;color:#e63946;font-size:1.2rem}
.faq-item.active .faq-question .arrow{transform:rotate(180deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all .4s;color:#a8b2d1;font-size:.9rem;line-height:1.8}
.faq-item.active .faq-answer{padding:0 24px 18px;max-height:500px}

/* === 用户评论 === */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.review-card{background:rgba(26,26,46,.6);border-radius:12px;padding:24px;border:1px solid rgba(168,178,209,.08)}
.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,#e63946,#c62828);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1rem}
.review-user{flex:1}
.review-user strong{color:#fff;font-size:.9rem;display:block}
.review-user span{color:#666;font-size:.75rem}
.review-stars{color:#ffc107;font-size:.85rem;letter-spacing:2px;margin-bottom:8px}
.review-card p{color:#a8b2d1;font-size:.88rem;line-height:1.7}

/* === 合作品牌 === */
.brand-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center}
.brand-wall .brand-item{background:rgba(255,255,255,.05);padding:16px 30px;border-radius:10px;color:#a8b2d1;font-size:1rem;font-weight:600;border:1px solid rgba(168,178,209,.1);transition:all .3s}
.brand-wall .brand-item:hover{border-color:#e63946;color:#e63946}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.contact-card{background:rgba(26,26,46,.6);border-radius:12px;padding:30px;text-align:center;border:1px solid rgba(168,178,209,.08)}
.contact-card h4{color:#fff;margin-bottom:12px;font-size:1.05rem}
.contact-card p{color:#a8b2d1;font-size:.88rem;line-height:1.8}
.contact-card .icon{font-size:2rem;margin-bottom:12px;color:#e63946}

/* === How-To指南 === */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}
.howto-step{background:rgba(26,26,46,.6);border-radius:12px;padding:30px 20px;text-align:center;border:1px solid rgba(168,178,209,.08);position:relative}
.step-num{width:40px;height:40px;background:linear-gradient(135deg,#e63946,#c62828);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;margin:0 auto 16px;font-size:1.1rem}
.howto-step h4{color:#fff;margin-bottom:8px;font-size:1rem}
.howto-step p{color:#a8b2d1;font-size:.85rem}

/* === 社交分享 === */
.share-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:25px;font-size:.85rem;font-weight:600;transition:all .3s;color:#fff;cursor:pointer;border:none}
.share-btn.wechat{background:#07c160}
.share-btn.weibo{background:#e6162d}
.share-btn.douyin{background:#161823}
.share-btn.bilibili{background:#00a1d6}
.share-btn:hover{transform:translateY(-2px);opacity:.9}

/* === 页脚 === */
.site-footer{background:rgba(10,10,20,.95);border-top:1px solid rgba(168,178,209,.1);padding:50px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:30px;margin-bottom:40px}
.footer-col h4{color:#fff;font-size:1rem;margin-bottom:16px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:#e63946}
.footer-col p,.footer-col a{color:#a8b2d1;font-size:.85rem;line-height:2}
.footer-col a:hover{color:#e63946}
.footer-col .qr-img{width:120px;border-radius:8px;margin-top:8px}
.footer-bottom{border-top:1px solid rgba(168,178,209,.08);padding:20px 0;text-align:center;color:#666;font-size:.8rem}
.footer-bottom .update-time{margin-top:6px;color:#555}

/* === AI模块 === */
.ai-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.ai-card{background:linear-gradient(135deg,rgba(26,26,46,.8),rgba(13,13,26,.9));border-radius:12px;padding:30px;border:1px solid rgba(0,200,255,.1);transition:all .4s}
.ai-card:hover{border-color:rgba(0,200,255,.4);box-shadow:0 0 30px rgba(0,200,255,.1)}
.ai-card h4{color:#00c8ff;margin-bottom:10px;font-size:1.05rem}
.ai-card p{color:#a8b2d1;font-size:.88rem;line-height:1.7}

/* === 面包屑 === */
.breadcrumb{padding:12px 0;font-size:.85rem;color:#666}
.breadcrumb a{color:#a8b2d1}
.breadcrumb a:hover{color:#e63946}
.breadcrumb span{margin:0 8px;color:#444}

/* === 内页通用 === */
.page-hero{padding:120px 0 60px;text-align:center;background:linear-gradient(180deg,rgba(230,57,70,.08),transparent)}
.page-hero h1{font-size:2.4rem;margin-bottom:12px}
.page-hero p{color:#a8b2d1;font-size:1rem}

/* === 娱乐专区 === */
.entertainment-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}
.ent-card{background:rgba(26,26,46,.6);border-radius:12px;overflow:hidden;border:1px solid rgba(168,178,209,.08);transition:all .4s}
.ent-card:hover{transform:translateY(-4px);border-color:rgba(230,57,70,.3)}
.ent-card .thumb{position:relative;padding-top:60%;overflow:hidden}
.ent-card .thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.ent-card:hover .thumb img{transform:scale(1.05)}
.ent-card .info{padding:16px}
.ent-card .info h4{color:#fff;font-size:.95rem;margin-bottom:6px}
.ent-card .info p{color:#a8b2d1;font-size:.82rem}

/* === 数据统计条 === */
.stats-bar{background:linear-gradient(135deg,rgba(230,57,70,.1),rgba(13,13,26,.5));padding:40px 0;border-top:1px solid rgba(230,57,70,.1);border-bottom:1px solid rgba(230,57,70,.1)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat-item .num{font-size:2.2rem;font-weight:800;color:#e63946;display:block}
.stat-item .label{color:#a8b2d1;font-size:.85rem;margin-top:4px}

/* === MCP前端代码区 === */
.mcp-widget{background:rgba(26,26,46,.6);border-radius:12px;padding:20px;border:1px solid rgba(168,178,209,.08);margin-top:20px}
.mcp-widget pre{background:rgba(0,0,0,.3);padding:16px;border-radius:8px;color:#00c8ff;font-size:.8rem;overflow-x:auto;font-family:"Fira Code",monospace}

/* === 信任声明区 === */
.footer-trust{padding:16px 0;text-align:center;border-top:1px solid rgba(168,178,209,.06);border-bottom:1px solid rgba(168,178,209,.06);margin-bottom:10px}
.footer-trust p{color:#555;font-size:.78rem;line-height:1.8}
.footer-trust a{color:#666}
.footer-trust a:hover{color:#e63946}

/* === 资质标签 === */
.credentials{color:#a8b2d1;font-size:.78rem;margin-bottom:10px;padding:4px 0;border-top:1px dashed rgba(168,178,209,.15);border-bottom:1px dashed rgba(168,178,209,.15)}

/* === 娱乐专区播放按钮 === */
.ent-card .thumb .play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:50px;height:50px;background:rgba(230,57,70,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:all .3s;cursor:pointer;z-index:3}
.ent-card:hover .thumb .play-btn{opacity:1}
.ent-card .thumb .play-btn::after{content:'';width:0;height:0;border-style:solid;border-width:8px 0 8px 14px;border-color:transparent transparent transparent #fff;margin-left:3px}

/* === video-poster覆盖层 === */
.video-thumb video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.video-thumb .video-poster{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1}
.video-thumb .play-btn{z-index:2}
.video-thumb .video-duration{z-index:2}

/* === 响应式 === */
@media(max-width:768px){
  .hero-content h1{font-size:2rem}
  .hero-content h1 .brand{font-size:2.4rem}
  .main-nav{display:none;position:absolute;top:70px;left:0;width:100%;background:rgba(13,13,26,.98);flex-direction:column;padding:20px 0}
  .main-nav.active{display:flex}
  .main-nav a{padding:12px 24px}
  .mobile-menu-btn{display:flex}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .section{padding:40px 0}
  .section-title h2{font-size:1.5rem}
  .video-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
  .hero-banner{height:70vh;min-height:400px}
  .hero-content h1{font-size:1.6rem}
  .hero-content h1 .brand{font-size:2rem}
  .hero-btns{flex-direction:column;align-items:center}
  .stats-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr}
  .search-box{flex-direction:row}
}