/* ========================================
   麻豆视频 - 汽车改装视频社区 | vooyoo.com.cn
   原创CSS样式表
   ======================================== */

/* CSS Variables */
:root {
  --color-primary: #E63946;
  --color-secondary: #1D3557;
  --color-accent: #F4A261;
  --color-bg: #0D1117;
  --color-text: #F1FAEE;
  --color-text-muted: #8B949E;
  --color-card: #1A1F2E;
  --color-card-hover: #222838;
  --color-border: #30363D;
  --color-surface: #161B22;
  --color-gradient-start: #E63946;
  --color-gradient-end: #F4A261;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-card: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-hover: 0 8px 40px rgba(230,57,70,0.2);
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
  --max-width: 1280px;
}

/* Reset */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.7;overflow-x:hidden}
a{color:var(--color-accent);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--color-primary)}
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}

/* Container */
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 20px}

/* ========== Header / Navigation ========== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(13,17,23,0.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--color-border);transition:var(--transition)}
.site-header.scrolled{background:rgba(13,17,23,0.98);box-shadow:0 2px 20px rgba(0,0,0,0.4)}
.nav-wrapper{display:flex;align-items:center;justify-content:space-between;height:68px}
.nav-brand{display:flex;align-items:center;gap:10px}
.nav-brand img{height:40px;width:40px;border-radius:50%}
.nav-brand span{font-size:1.25rem;font-weight:800;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.nav-menu{display:flex;align-items:center;gap:6px}
.nav-menu a{padding:8px 14px;font-size:0.9rem;color:var(--color-text-muted);border-radius:var(--radius-sm);transition:var(--transition);font-weight:500}
.nav-menu a:hover,.nav-menu a.active{color:var(--color-text);background:rgba(230,57,70,0.12)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--color-text);border-radius:2px;transition:var(--transition)}

/* Search Bar */
.search-bar{background:var(--color-surface);border-bottom:1px solid var(--color-border);padding:12px 0;margin-top:68px}
.search-wrapper{display:flex;align-items:center;max-width:640px;margin:0 auto;background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;transition:var(--transition)}
.search-wrapper:focus-within{border-color:var(--color-primary);box-shadow:0 0 0 3px rgba(230,57,70,0.15)}
.search-wrapper input{flex:1;padding:10px 18px;background:transparent;border:none;color:var(--color-text);font-size:0.95rem;outline:none}
.search-wrapper input::placeholder{color:var(--color-text-muted)}
.search-wrapper button{padding:10px 20px;background:var(--color-primary);border:none;color:#fff;cursor:pointer;font-size:0.9rem;font-weight:600;transition:var(--transition)}
.search-wrapper button:hover{background:#d32f3f}

/* ========== Hero Section ========== */
.hero{position:relative;height:85vh;min-height:520px;display:flex;align-items:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(13,17,23,0.85) 0%,rgba(29,53,87,0.6) 50%,rgba(13,17,23,0.8) 100%)}
.hero-content{position:relative;z-index:2;text-align:center;width:100%;padding:0 20px}
.hero-content h1{font-size:3.2rem;margin-bottom:16px;text-shadow:0 4px 20px rgba(0,0,0,0.5)}
.hero-content h1 .brand-highlight{background:linear-gradient(135deg,var(--color-primary),var(--color-accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-content p{font-size:1.2rem;color:var(--color-text-muted);max-width:680px;margin:0 auto 30px}
.hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:30px}
.hero-tags span{padding:6px 16px;background:rgba(230,57,70,0.15);border:1px solid rgba(230,57,70,0.3);border-radius:20px;font-size:0.85rem;color:var(--color-accent)}
.hero-btns{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:var(--radius-md);font-weight:600;font-size:0.95rem;transition:var(--transition);cursor:pointer;border:none}
.btn-primary{background:linear-gradient(135deg,var(--color-primary),#d32f3f);color:#fff;box-shadow:0 4px 20px rgba(230,57,70,0.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(230,57,70,0.4);color:#fff}
.btn-outline{background:transparent;border:2px solid var(--color-accent);color:var(--color-accent)}
.btn-outline:hover{background:var(--color-accent);color:var(--color-bg);transform:translateY(-2px)}

/* ========== Section Common ========== */
.section{padding:80px 0}
.section-dark{background:var(--color-surface)}
.section-header{text-align:center;margin-bottom:50px}
.section-header h2{font-size:2.2rem;margin-bottom:12px}
.section-header h2 .highlight{color:var(--color-primary)}
.section-header p{color:var(--color-text-muted);font-size:1.05rem;max-width:600px;margin:0 auto}
.section-tag{display:inline-block;padding:4px 14px;background:rgba(230,57,70,0.12);color:var(--color-primary);border-radius:20px;font-size:0.8rem;font-weight:600;margin-bottom:12px;letter-spacing:1px;text-transform:uppercase}

/* ========== Video Card Grid ========== */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.video-card{background:var(--color-card);border-radius:var(--radius-md);overflow:hidden;transition:var(--transition);border:1px solid var(--color-border);cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:var(--color-primary)}
.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:var(--transition)}
.video-card:hover .video-thumb img{transform:scale(1.05)}
.video-play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:var(--transition);background:rgba(0,0,0,0.4)}
.video-card:hover .video-play{opacity:1}
.play-icon{width:60px;height:60px;background:rgba(230,57,70,0.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:var(--transition)}
.play-icon::after{content:'';width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:3px}
.video-card:hover .play-icon{transform:scale(1.1);background:var(--color-primary)}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,0.8);color:#fff;padding:2px 8px;border-radius:4px;font-size:0.75rem;font-weight:600}
.video-info{padding:16px}
.video-info h3{font-size:1rem;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;align-items:center;gap:12px;color:var(--color-text-muted);font-size:0.8rem}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tag{display:inline-block;padding:2px 8px;background:rgba(244,162,97,0.12);color:var(--color-accent);border-radius:4px;font-size:0.72rem;margin-top:8px}

/* ========== Short Video (TikTok Style) ========== */
.short-video-scroll{display:flex;gap:16px;overflow-x:auto;padding-bottom:16px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}
.short-video-scroll::-webkit-scrollbar{height:6px}
.short-video-scroll::-webkit-scrollbar-track{background:var(--color-surface)}
.short-video-scroll::-webkit-scrollbar-thumb{background:var(--color-primary);border-radius:3px}
.short-card{flex:0 0 220px;scroll-snap-align:start;background:var(--color-card);border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--color-border);transition:var(--transition)}
.short-card:hover{border-color:var(--color-primary);transform:translateY(-4px)}
.short-thumb{position:relative;padding-top:177%;overflow:hidden}
.short-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:var(--transition)}
.short-card:hover .short-thumb img{transform:scale(1.05)}
.short-play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:var(--transition);background:rgba(0,0,0,0.3)}
.short-card:hover .short-play{opacity:1}
.short-play .play-icon{width:48px;height:48px}
.short-info{padding:12px}
.short-info h4{font-size:0.85rem;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.short-info p{font-size:0.75rem;color:var(--color-text-muted)}

/* ========== AI Section ========== */
.ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ai-card{background:var(--color-card);border-radius:var(--radius-md);padding:32px 24px;border:1px solid var(--color-border);transition:var(--transition);text-align:center}
.ai-card:hover{border-color:var(--color-primary);transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.ai-icon{width:64px;height:64px;margin:0 auto 20px;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.8rem}
.ai-card h3{font-size:1.15rem;margin-bottom:10px}
.ai-card p{color:var(--color-text-muted);font-size:0.9rem}

/* ========== Category Tabs ========== */
.cat-tabs{display:flex;justify-content:center;gap:8px;margin-bottom:32px;flex-wrap:wrap}
.cat-tab{padding:8px 20px;background:var(--color-card);border:1px solid var(--color-border);border-radius:20px;color:var(--color-text-muted);font-size:0.9rem;cursor:pointer;transition:var(--transition)}
.cat-tab:hover,.cat-tab.active{background:var(--color-primary);color:#fff;border-color:var(--color-primary)}

/* ========== Expert Cards ========== */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:var(--color-card);border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--color-border);transition:var(--transition);text-align:center}
.expert-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--color-primary)}
.expert-avatar{width:100px;height:100px;border-radius:50%;margin:24px auto 16px;overflow:hidden;border:3px solid var(--color-primary)}
.expert-avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h3{font-size:1.05rem;margin-bottom:4px}
.expert-card .role{color:var(--color-accent);font-size:0.85rem;margin-bottom:8px}
.expert-card .desc{color:var(--color-text-muted);font-size:0.82rem;padding:0 16px;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.expert-social{display:flex;justify-content:center;gap:8px;padding-bottom:20px}
.expert-social a{width:32px;height:32px;background:var(--color-surface);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0.8rem;color:var(--color-text-muted);transition:var(--transition)}
.expert-social a:hover{background:var(--color-primary);color:#fff}
.expert-btns{display:flex;gap:8px;padding:0 16px 20px;justify-content:center}
.expert-btns a{padding:6px 14px;font-size:0.78rem;border-radius:var(--radius-sm)}

/* ========== Partner Logo Wall ========== */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:32px;align-items:center}
.partner-wall .partner-item{width:120px;height:60px;background:var(--color-card);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;border:1px solid var(--color-border);transition:var(--transition);padding:10px;color:var(--color-text-muted);font-weight:700;font-size:0.85rem}
.partner-wall .partner-item:hover{border-color:var(--color-primary);background:var(--color-card-hover)}

/* ========== FAQ Section ========== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius-md);margin-bottom:12px;overflow:hidden;transition:var(--transition)}
.faq-item:hover{border-color:var(--color-primary)}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:0.95rem;transition:var(--transition)}
.faq-question:hover{color:var(--color-primary)}
.faq-arrow{width:24px;height:24px;display:flex;align-items:center;justify-content:center;transition:var(--transition);color:var(--color-text-muted)}
.faq-item.open .faq-arrow{transform:rotate(180deg);color:var(--color-primary)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height 0.4s ease;padding:0 24px}
.faq-item.open .faq-answer{max-height:300px;padding-bottom:18px}
.faq-answer p{color:var(--color-text-muted);font-size:0.9rem;line-height:1.8}

/* ========== Reviews ========== */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.review-card{background:var(--color-card);border-radius:var(--radius-md);padding:24px;border:1px solid var(--color-border);transition:var(--transition)}
.review-card:hover{border-color:var(--color-accent);transform:translateY(-2px)}
.review-stars{color:var(--color-accent);font-size:0.9rem;margin-bottom:12px;letter-spacing:2px}
.review-text{color:var(--color-text-muted);font-size:0.9rem;margin-bottom:16px;line-height:1.7;font-style:italic}
.review-author{display:flex;align-items:center;gap:12px}
.review-author .avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));display:flex;align-items:center;justify-content:center;font-weight:700;font-size:0.9rem;color:#fff}
.review-author .info h4{font-size:0.9rem;margin-bottom:2px}
.review-author .info p{font-size:0.78rem;color:var(--color-text-muted)}

/* ========== Contact Section ========== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-info{background:var(--color-card);border-radius:var(--radius-md);padding:32px;border:1px solid var(--color-border)}
.contact-info h3{font-size:1.3rem;margin-bottom:20px;color:var(--color-primary)}
.contact-item{display:flex;align-items:flex-start;gap:12px;margin-bottom:16px}
.contact-icon{width:40px;height:40px;background:rgba(230,57,70,0.12);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--color-primary);font-weight:700}
.contact-item .text h4{font-size:0.95rem;margin-bottom:2px}
.contact-item .text p{color:var(--color-text-muted);font-size:0.85rem}
.contact-qrcodes{display:flex;gap:24px;margin-top:24px}
.qr-box{text-align:center}
.qr-box img{width:140px;height:140px;border-radius:var(--radius-sm);margin-bottom:8px;border:2px solid var(--color-border)}
.qr-box p{font-size:0.8rem;color:var(--color-text-muted)}
.contact-community{background:var(--color-card);border-radius:var(--radius-md);padding:32px;border:1px solid var(--color-border)}
.contact-community h3{font-size:1.3rem;margin-bottom:20px;color:var(--color-accent)}
.community-links{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.community-link{display:flex;align-items:center;gap:10px;padding:14px;background:var(--color-surface);border-radius:var(--radius-sm);border:1px solid var(--color-border);transition:var(--transition)}
.community-link:hover{border-color:var(--color-primary);background:var(--color-card-hover)}
.community-link .icon{width:36px;height:36px;border-radius:var(--radius-sm);background:var(--color-primary);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:0.8rem;color:#fff}
.community-link .text h4{font-size:0.88rem;margin-bottom:2px}
.community-link .text p{font-size:0.75rem;color:var(--color-text-muted)}

/* ========== How-To Guide ========== */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;max-width:960px;margin:0 auto}
.howto-step{text-align:center;position:relative}
.step-num{width:48px;height:48px;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.2rem;margin:0 auto 16px;color:#fff}
.howto-step h4{font-size:0.95rem;margin-bottom:8px}
.howto-step p{color:var(--color-text-muted);font-size:0.82rem}

/* ========== Social Share ========== */
.share-bar{display:flex;justify-content:center;gap:12px;padding:24px 0}
.share-btn{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0.85rem;font-weight:700;color:#fff;transition:var(--transition);cursor:pointer;border:none}
.share-btn:hover{transform:translateY(-3px);box-shadow:0 4px 16px rgba(0,0,0,0.3)}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#161823}
.share-bilibili{background:#00A1D6}

/* ========== Footer ========== */
.site-footer{background:var(--color-surface);border-top:1px solid var(--color-border);padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand img{width:36px;height:36px;border-radius:50%}
.footer-brand span{font-size:1.1rem;font-weight:800;color:var(--color-primary)}
.footer-desc{color:var(--color-text-muted);font-size:0.85rem;margin-bottom:16px;line-height:1.7}
.footer-col h4{font-size:0.95rem;margin-bottom:16px;color:var(--color-text)}
.footer-col a{display:block;color:var(--color-text-muted);font-size:0.85rem;padding:4px 0;transition:var(--transition)}
.footer-col a:hover{color:var(--color-primary);padding-left:4px}
.footer-bottom{border-top:1px solid var(--color-border);padding-top:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer-bottom p{color:var(--color-text-muted);font-size:0.82rem}
.footer-qr{display:flex;gap:16px}
.footer-qr img{width:80px;height:80px;border-radius:var(--radius-sm);border:1px solid var(--color-border)}

/* ========== Breadcrumb ========== */
.breadcrumb{padding:16px 0;font-size:0.85rem;color:var(--color-text-muted)}
.breadcrumb a{color:var(--color-accent)}
.breadcrumb span{margin:0 6px;color:var(--color-border)}

/* ========== Page Hero (Inner Pages) ========== */
.page-hero{padding:120px 0 60px;background:linear-gradient(135deg,var(--color-bg),var(--color-secondary));text-align:center}
.page-hero h1{font-size:2.4rem;margin-bottom:12px}
.page-hero p{color:var(--color-text-muted);font-size:1.05rem}

/* ========== MCP Frontend Code Block ========== */
.mcp-widget{background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:24px;margin:24px 0}
.mcp-widget h4{color:var(--color-accent);margin-bottom:12px}
.mcp-status{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.mcp-dot{width:8px;height:8px;border-radius:50%;background:#2ea043;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:0.4}}
.mcp-status span{font-size:0.85rem;color:var(--color-text-muted)}
.mcp-actions{display:flex;gap:8px;flex-wrap:wrap}
.mcp-actions button{padding:6px 14px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text-muted);font-size:0.8rem;cursor:pointer;transition:var(--transition)}
.mcp-actions button:hover{border-color:var(--color-primary);color:var(--color-primary)}

/* ========== Responsive ========== */
@media(max-width:1024px){
  .ai-grid{grid-template-columns:repeat(2,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .howto-steps{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .nav-menu{position:fixed;top:68px;left:0;right:0;background:var(--color-bg);flex-direction:column;padding:20px;border-bottom:1px solid var(--color-border);transform:translateY(-120%);transition:var(--transition);opacity:0}
  .nav-menu.open{transform:translateY(0);opacity:1}
  .nav-toggle{display:flex}
  .hero-content h1{font-size:2rem}
  .hero-content p{font-size:1rem}
  .section{padding:50px 0}
  .section-header h2{font-size:1.6rem}
  .video-grid{grid-template-columns:1fr}
  .ai-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .community-links{grid-template-columns:1fr}
  .hero{height:auto;min-height:480px;padding:120px 0 60px}
  .contact-qrcodes{flex-direction:column;align-items:center}
}
@media(max-width:480px){
  .hero-content h1{font-size:1.6rem}
  .hero-btns{flex-direction:column;align-items:center}
  .btn{width:100%;justify-content:center}
  .short-card{flex:0 0 160px}
}

/* ========== Lazy Load ========== */
img[loading="lazy"]{opacity:0;transition:opacity 0.5s ease}
img[loading="lazy"].loaded,img[loading="lazy"][src]{opacity:1}

/* ========== Animations ========== */
.fade-in{opacity:0;transform:translateY(20px);transition:opacity 0.6s ease,transform 0.6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}