/* ============================================
   91 修车改装视频社区 - 全站样式表
   原创设计 wvkiovey.cn
   ============================================ */

/* === 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;background:#0d1117;color:#e6e8eb;line-height:1.75;overflow-x:hidden}
a{color:#e94560;text-decoration:none;transition:color .3s}
a:hover{color:#f5a623}
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,#e94560,#f5a623);border-radius:2px}
.section-title p{color:#8b949e;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(13,17,23,.95);backdrop-filter:blur(10px);border-bottom:1px solid rgba(233,69,96,.15);transition:all .3s}
.header-inner{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:1.4rem;font-weight:800;color:#fff;letter-spacing:1px}
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{padding:8px 16px;font-size:.95rem;color:#c9d1d9;transition:all .3s;position:relative;white-space:nowrap}
.main-nav a::after{content:"";position:absolute;bottom:0;left:50%;width:0;height:2px;background:#e94560;transition:all .3s;transform:translateX(-50%)}
.main-nav a:hover,.main-nav a.active{color:#e94560}
.main-nav a:hover::after,.main-nav a.active::after{width:70%}
.mobile-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:5px}
.mobile-toggle span{width:25px;height:2px;background:#fff;transition:all .3s}

/* === 搜索框 === */
.search-bar{background:rgba(22,33,62,.8);padding:12px 0;border-bottom:1px solid rgba(233,69,96,.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(233,69,96,.3);border-right:none;border-radius:25px 0 0 25px;color:#fff;font-size:.9rem;outline:none;transition:all .3s}
.search-box input:focus{border-color:#e94560;background:rgba(255,255,255,.12)}
.search-box input::placeholder{color:#6e7681}
.search-box button{padding:10px 24px;background:linear-gradient(135deg,#e94560,#c73650);color:#fff;border:none;border-radius:0 25px 25px 0;cursor:pointer;font-size:.9rem;transition:all .3s;white-space:nowrap}
.search-box button:hover{background:linear-gradient(135deg,#f5a623,#e94560)}

/* === Banner === */
.hero-banner{position:relative;height:85vh;min-height:500px;overflow:hidden;margin-top:70px}
.hero-banner .bg-img{position:absolute;inset:0;background-size:cover;background-position:center;background-repeat:no-repeat}
.hero-banner .overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,17,23,.4) 0%,rgba(13,17,23,.85) 100%)}
.hero-content{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;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:#e94560;font-size:3.8rem}
.hero-content .subtitle{font-size:1.2rem;color:#c9d1d9;max-width:700px;margin-bottom:30px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:15px}
.hero-tags span{padding:6px 16px;background:rgba(233,69,96,.15);border:1px solid rgba(233,69,96,.3);border-radius:20px;font-size:.85rem;color:#e94560}
.hero-stats{display:flex;gap:40px;margin-top:35px}
.hero-stats .stat{text-align:center}
.hero-stats .stat .num{font-size:2.2rem;font-weight:800;color:#f5a623}
.hero-stats .stat .label{font-size:.85rem;color:#8b949e;margin-top:4px}

/* === 时效性标识 === */
.update-notice{padding:20px 0}
.freshness-badge{display:inline-block;padding:8px 24px;background:linear-gradient(135deg,rgba(233,69,96,.15),rgba(245,166,35,.15));border:1px solid rgba(233,69,96,.3);border-radius:30px;color:#f5a623;font-size:.9rem;font-weight:600;letter-spacing:.5px}

/* === 视频卡片 === */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:rgba(22,33,62,.6);border-radius:12px;overflow:hidden;border:1px solid rgba(233,69,96,.1);transition:all .4s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);border-color:rgba(233,69,96,.4);box-shadow:0 12px 40px rgba(233,69,96,.15)}
.video-card .thumb{position:relative;padding-top:56.25%;overflow:hidden}
.video-card .thumb img,.video-card .thumb video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .thumb img,.video-card:hover .thumb video{transform:scale(1.08)}
.video-card .play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;background:rgba(233,69,96,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:all .3s;z-index:2}
.video-card:hover .play-btn{opacity:1}
.video-card .play-btn::after{content:"";width:0;height:0;border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:4px}
.video-card .duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.8);color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem;z-index:2}
.video-card .info{padding:14px 16px}
.video-card .info h3{font-size:.95rem;color:#e6e8eb;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.4}
.video-card .meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:.8rem;color:#6e7681}
.video-card .meta .views{display:flex;align-items:center;gap:4px}
.video-card .meta .likes{color:#e94560}
.video-card .meta .pub-date{color:#6e7681;font-size:.75rem}
.video-card .tag{display:inline-block;padding:2px 8px;background:rgba(233,69,96,.12);color:#e94560;border-radius:10px;font-size:.72rem;margin-top:6px}

/* === 短视频风格 === */
.short-video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.short-card{position:relative;border-radius:12px;overflow:hidden;padding-top:160%;background:#16213e;cursor:pointer}
.short-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.short-card:hover img{transform:scale(1.05)}
.short-card .short-overlay{position:absolute;inset:0;background:linear-gradient(0deg,rgba(0,0,0,.7) 0%,transparent 50%);z-index:1}
.short-card .short-info{position:absolute;bottom:0;left:0;right:0;padding:12px;z-index:2}
.short-card .short-info h4{font-size:.85rem;color:#fff;margin-bottom:4px}
.short-card .short-info span{font-size:.75rem;color:#8b949e}
.short-card .play-icon{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:50px;height:50px;background:rgba(233,69,96,.8);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:all .3s;z-index:3}
.short-card:hover .play-icon{opacity:1}
.short-card .play-icon::after{content:"";width:0;height:0;border-left:16px solid #fff;border-top:10px solid transparent;border-bottom:10px solid transparent;margin-left:3px}

/* === AI赋能模块 === */
.ai-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.ai-card{background:linear-gradient(135deg,rgba(15,52,96,.6),rgba(22,33,62,.8));border:1px solid rgba(245,166,35,.15);border-radius:14px;padding:30px 24px;text-align:center;transition:all .4s}
.ai-card:hover{transform:translateY(-5px);border-color:rgba(245,166,35,.4);box-shadow:0 8px 30px rgba(245,166,35,.1)}
.ai-card .icon{width:64px;height:64px;margin:0 auto 18px;background:linear-gradient(135deg,#e94560,#f5a623);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.8rem}
.ai-card h3{font-size:1.1rem;margin-bottom:10px;color:#f5a623}
.ai-card p{font-size:.88rem;color:#8b949e;line-height:1.6}

/* === 专家展示 === */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:28px}
.expert-card{background:rgba(22,33,62,.5);border:1px solid rgba(233,69,96,.1);border-radius:14px;overflow:hidden;transition:all .4s;text-align:center}
.expert-card:hover{border-color:rgba(233,69,96,.3);box-shadow:0 8px 30px rgba(233,69,96,.1)}
.expert-card .avatar{width:100%;height:280px;overflow:hidden}
.expert-card .avatar img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.expert-card:hover .avatar img{transform:scale(1.05)}
.expert-card .expert-info{padding:20px}
.expert-card .expert-info h3{font-size:1.1rem;margin-bottom:4px}
.expert-card .expert-info .role{color:#e94560;font-size:.85rem;margin-bottom:10px}
.expert-card .expert-info p{font-size:.83rem;color:#8b949e;line-height:1.6;margin-bottom:12px}
.expert-card .expert-btns{display:flex;gap:8px;justify-content:center}
.expert-card .expert-btns a{padding:6px 14px;border-radius:20px;font-size:.8rem;transition:all .3s}
.btn-primary{background:linear-gradient(135deg,#e94560,#c73650);color:#fff;border:none}
.btn-primary:hover{background:linear-gradient(135deg,#f5a623,#e94560);color:#fff}
.btn-outline{border:1px solid #e94560;color:#e94560;background:transparent}
.btn-outline:hover{background:#e94560;color:#fff}

/* === 合作品牌墙 === */
.brand-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center}
.brand-wall .brand-item{width:140px;height:80px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:.9rem;color:#8b949e;font-weight:600;transition:all .3s}
.brand-wall .brand-item:hover{border-color:rgba(233,69,96,.3);color:#e94560;background:rgba(233,69,96,.05)}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:rgba(22,33,62,.5);border:1px solid rgba(233,69,96,.1);border-radius:10px;margin-bottom:12px;overflow:hidden}
.faq-item .faq-q{padding:16px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:#e6e8eb;transition:all .3s}
.faq-item .faq-q:hover{color:#e94560}
.faq-item .faq-q .arrow{transition:transform .3s;color:#e94560;font-size:1.2rem}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-item .faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:all .4s;color:#8b949e;font-size:.9rem;line-height:1.7}
.faq-item.open .faq-a{padding:0 20px 16px;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(22,33,62,.5);border:1px solid rgba(233,69,96,.08);border-radius:12px;padding:24px;transition:all .3s}
.review-card:hover{border-color:rgba(233,69,96,.25)}
.review-card .stars{color:#f5a623;margin-bottom:10px;font-size:1rem;letter-spacing:2px}
.review-card .review-text{font-size:.9rem;color:#c9d1d9;line-height:1.7;margin-bottom:14px;font-style:italic}
.review-card .reviewer{display:flex;align-items:center;gap:10px}
.review-card .reviewer .avatar-sm{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#e94560,#f5a623);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.85rem}
.review-card .reviewer .name{font-size:.85rem;color:#e6e8eb}
.review-card .reviewer .date{font-size:.75rem;color:#6e7681}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.contact-card{background:rgba(22,33,62,.5);border:1px solid rgba(233,69,96,.1);border-radius:12px;padding:24px;text-align:center}
.contact-card h4{color:#e94560;margin-bottom:12px;font-size:1rem}
.contact-card p{font-size:.88rem;color:#8b949e;line-height:1.7}
.contact-card .qr-img{width:150px;height:150px;margin:12px auto;border-radius:8px;overflow:hidden}
.contact-card .qr-img img{width:100%;height:100%;object-fit:cover}

/* === 社交分享 === */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}
.share-btn{padding:8px 20px;border-radius:20px;font-size:.85rem;color:#fff;cursor:pointer;transition:all .3s;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{opacity:.85;transform:translateY(-2px)}

/* === How-To指南 === */
.howto-steps{max-width:700px;margin:0 auto}
.howto-step{display:flex;gap:20px;margin-bottom:24px;align-items:flex-start}
.howto-step .step-num{width:44px;height:44px;min-width:44px;background:linear-gradient(135deg,#e94560,#f5a623);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:1.1rem}
.howto-step .step-content h4{font-size:1rem;margin-bottom:6px;color:#e6e8eb}
.howto-step .step-content p{font-size:.88rem;color:#8b949e;line-height:1.6}

/* === MCP前端代码区 === */
.mcp-section{background:rgba(15,52,96,.2);border:1px solid rgba(245,166,35,.1);border-radius:12px;padding:24px;margin-top:20px}
.mcp-section pre{background:rgba(0,0,0,.3);padding:16px;border-radius:8px;overflow-x:auto;font-size:.8rem;color:#7ee787;line-height:1.6}

/* === 页脚 === */
.site-footer{background:rgba(10,13,18,.95);border-top:1px solid rgba(233,69,96,.1);padding:40px 0 20px}
.footer-top{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;margin-bottom:30px}
.footer-col h4{color:#e94560;margin-bottom:14px;font-size:1rem}
.footer-col p,.footer-col a{font-size:.85rem;color:#6e7681;line-height:2}
.footer-col a:hover{color:#e94560}
.footer-col .footer-logo{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.footer-col .footer-logo img{height:35px}
.footer-col .footer-logo span{font-size:1.2rem;font-weight:800;color:#fff}
.footer-qr{display:flex;gap:16px;margin-top:10px}
.footer-qr .qr-box{text-align:center}
.footer-qr .qr-box img{width:80px;height:80px;border-radius:6px}
.footer-qr .qr-box span{display:block;font-size:.72rem;color:#6e7681;margin-top:4px}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(255,255,255,.05);font-size:.82rem;color:#484f58}
.footer-bottom .update-time{margin-top:6px;color:#6e7681}

/* === 面包屑 === */
.breadcrumb{padding:15px 0;font-size:.85rem;color:#6e7681}
.breadcrumb a{color:#8b949e}
.breadcrumb a:hover{color:#e94560}
.breadcrumb span{margin:0 6px;color:#484f58}

/* === 内页通用 === */
.page-hero{height:350px;position:relative;margin-top:70px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.page-hero .bg-img{position:absolute;inset:0;background-size:cover;background-position:center}
.page-hero .overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,17,23,.5),rgba(13,17,23,.9))}
.page-hero .page-title{position:relative;z-index:2;text-align:center}
.page-hero .page-title h1{font-size:2.6rem;margin-bottom:10px}
.page-hero .page-title p{color:#8b949e;font-size:1rem}

/* === 响应式 === */
@media(max-width:768px){
  .header-inner{padding:0 15px}
  .main-nav{position:fixed;top:70px;left:0;width:100%;background:rgba(13,17,23,.98);flex-direction:column;padding:20px;transform:translateY(-120%);transition:transform .3s;z-index:999}
  .main-nav.open{transform:translateY(0)}
  .main-nav a{padding:12px 0;border-bottom:1px solid rgba(255,255,255,.05)}
  .mobile-toggle{display:flex}
  .hero-banner{height:70vh;min-height:400px}
  .hero-content h1{font-size:2rem}
  .hero-content h1 .brand{font-size:2.4rem}
  .hero-stats{gap:20px}
  .hero-stats .stat .num{font-size:1.6rem}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
  .short-video-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
  .section{padding:40px 0}
  .section-title h2{font-size:1.5rem}
  .expert-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
  .footer-top{grid-template-columns:1fr}
  .page-hero{height:250px}
  .page-hero .page-title h1{font-size:1.8rem}
}
@media(max-width:480px){
  .hero-content h1{font-size:1.6rem}
  .hero-content h1 .brand{font-size:2rem}
  .video-grid{grid-template-columns:1fr}
  .ai-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
}