/* 男同网修车改装视频社区 - 原创样式 */
/* 主色调：深碳灰 #1a1a2e + 赛车红 #e63946 + 钛金银 #a8b2c1 */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:#2d2d3a;background:#f5f6fa;line-height:1.7}
a{color:#e63946;text-decoration:none;transition:color .2s}
a:hover{color:#c1121f}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{background:#1a1a2e;position:sticky;top:0;z-index:100;box-shadow:0 2px 12px rgba(0,0,0,.3)}
.header-inner{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto;padding:10px 20px}
.logo-link{display:flex;align-items:center;gap:10px}
.logo-img{border-radius:8px}
.logo-text{font-size:1.6rem;font-weight:800;color:#e63946;letter-spacing:2px}
.main-nav ul{display:flex;list-style:none;gap:6px}
.main-nav a{color:#a8b2c1;padding:8px 14px;border-radius:6px;font-size:.92rem;transition:all .2s}
.main-nav a:hover,.main-nav a.active{color:#fff;background:#e63946}
.mobile-menu-btn{display:none;background:none;border:none;color:#a8b2c1;font-size:1.6rem;cursor:pointer}
.search-bar{background:#12121f;padding:8px 0}
.search-inner{max-width:600px;margin:0 auto;display:flex;padding:0 20px}
.search-inner input{flex:1;padding:10px 16px;border:2px solid #2a2a4a;border-right:none;border-radius:8px 0 0 8px;background:#1a1a2e;color:#fff;font-size:.95rem;outline:none;transition:border-color .2s}
.search-inner input:focus{border-color:#e63946}
.search-inner input::placeholder{color:#5a5a7a}
.search-inner button{padding:10px 24px;background:#e63946;color:#fff;border:none;border-radius:0 8px 8px 0;cursor:pointer;font-size:.95rem;transition:background .2s}
.search-inner button:hover{background:#c1121f}

/* Breadcrumb */
.breadcrumb{background:#ecedf2;padding:12px 0;font-size:.88rem;color:#666}
.breadcrumb a{color:#e63946}

/* Hero Banner */
.hero-banner{position:relative;min-height:520px;background-size:cover;background-position:center;display:flex;align-items:center}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(26,26,46,.92) 0%,rgba(26,26,46,.7) 50%,rgba(230,57,70,.3) 100%);display:flex;align-items:center}
.hero-content{max-width:1200px;margin:0 auto;padding:60px 20px;color:#fff}
.hero-content h1{font-size:2.2rem;font-weight:800;margin-bottom:18px;line-height:1.3;text-shadow:0 2px 8px rgba(0,0,0,.3)}
.hero-desc{font-size:1.05rem;color:#c8cdd8;max-width:700px;margin-bottom:28px;line-height:1.8}
.hero-btns{display:flex;gap:16px;margin-bottom:36px;flex-wrap:wrap}
.btn-primary{display:inline-block;padding:14px 32px;background:#e63946;color:#fff;border-radius:8px;font-weight:600;font-size:1rem;transition:all .2s;box-shadow:0 4px 16px rgba(230,57,70,.35)}
.btn-primary:hover{background:#c1121f;transform:translateY(-2px);color:#fff}
.btn-secondary{display:inline-block;padding:14px 32px;border:2px solid #a8b2c1;color:#a8b2c1;border-radius:8px;font-weight:600;font-size:1rem;transition:all .2s}
.btn-secondary:hover{border-color:#e63946;color:#e63946}
.hero-stats{display:flex;gap:40px;flex-wrap:wrap}
.stat-item{text-align:center}
.stat-num{display:block;font-size:1.8rem;font-weight:800;color:#e63946}
.stat-label{font-size:.85rem;color:#a8b2c1}

/* Section Headers */
.section-header{text-align:center;margin-bottom:40px;padding-top:60px}
.section-header h2{font-size:1.8rem;font-weight:700;color:#1a1a2e;margin-bottom:12px;position:relative;display:inline-block}
.section-header h2::after{content:'';position:absolute;bottom:-8px;left:50%;transform:translateX(-50%);width:60px;height:3px;background:#e63946;border-radius:2px}
.section-desc{color:#666;font-size:.95rem;max-width:700px;margin:16px auto 0}

/* Video Grid */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:30px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s}
.video-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(0,0,0,.12)}
.video-thumb{position:relative;overflow:hidden;aspect-ratio:16/9;background:#1a1a2e}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb img{transform:scale(1.06)}
.play-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.25);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%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.4rem;padding-left:4px;box-shadow:0 4px 20px rgba(230,57,70,.4);transition:transform .2s}
.play-btn:hover{transform:scale(1.1)}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:.78rem}
.video-tag{position:absolute;top:8px;left:8px;background:#e63946;color:#fff;padding:3px 10px;border-radius:4px;font-size:.75rem;font-weight:600}
.video-info{padding:14px}
.video-info h3{font-size:.92rem;font-weight:600;margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-info h3 a{color:#2d2d3a}
.video-info h3 a:hover{color:#e63946}
.video-meta{display:flex;gap:12px;font-size:.78rem;color:#888;flex-wrap:wrap}
.section-more{text-align:center;padding:20px 0 40px}
.btn-outline{display:inline-block;padding:12px 32px;border:2px solid #e63946;color:#e63946;border-radius:8px;font-weight:600;transition:all .2s}
.btn-outline:hover{background:#e63946;color:#fff}

/* AI Section */
.ai-section{background:linear-gradient(135deg,#1a1a2e 0%,#2a2a4e 100%);color:#fff;padding-bottom:60px}
.ai-section .section-header h2{color:#fff}
.ai-section .section-desc{color:#a8b2c1}
.ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ai-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:14px;padding:36px 28px;text-align:center;transition:all .3s}
.ai-card:hover{background:rgba(230,57,70,.1);border-color:rgba(230,57,70,.3);transform:translateY(-4px)}
.ai-icon{font-size:2.8rem;margin-bottom:16px}
.ai-card h3{font-size:1.1rem;margin-bottom:12px;color:#fff}
.ai-card p{color:#a8b2c1;font-size:.9rem;line-height:1.7}

/* Topic Grid */
.topic-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-bottom:30px}
.topic-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s;border-left:4px solid #e63946}
.topic-card:hover{transform:translateY(-3px);box-shadow:0 6px 24px rgba(0,0,0,.1)}
.topic-tag{display:inline-block;padding:3px 12px;border-radius:20px;font-size:.78rem;font-weight:600;background:#f0f0f5;color:#666;margin-bottom:10px}
.topic-tag.hot{background:#e63946;color:#fff}
.topic-card h4{font-size:1rem;margin-bottom:8px;color:#1a1a2e}
.topic-card p{font-size:.88rem;color:#666;margin-bottom:10px;line-height:1.6}
.topic-stats{display:flex;gap:16px;font-size:.78rem;color:#999}

/* Reviews */
.reviews-section{background:#f0f1f6;padding-bottom:60px}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review-card{background:#fff;border-radius:12px;padding:28px;box-shadow:0 2px 10px rgba(0,0,0,.05)}
.review-stars{color:#f5a623;font-size:1.2rem;margin-bottom:12px}
.review-text{font-size:.92rem;color:#444;line-height:1.7;margin-bottom:14px;font-style:italic}
.review-author{font-size:.82rem;color:#888}
.review-author strong{color:#2d2d3a}

/* FAQ */
.faq-section{padding-bottom:60px}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:10px;margin-bottom:12px;overflow:hidden;box-shadow:0 1px 6px rgba(0,0,0,.05)}
.faq-question{padding:18px 24px;cursor:pointer;font-size:.98rem;font-weight:600;color:#1a1a2e;position:relative;padding-right:40px}
.faq-question::after{content:'+';position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:1.4rem;color:#e63946;transition:transform .3s}
.faq-item.open .faq-question::after{transform:translateY(-50%) rotate(45deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all .3s}
.faq-item.open .faq-answer{padding:0 24px 18px;max-height:300px}
.faq-answer p{font-size:.9rem;color:#555;line-height:1.7}

/* Partners */
.partners-section{background:#1a1a2e;padding:50px 0}
.partners-section .section-header h2{color:#fff}
.partners-section .section-desc{color:#a8b2c1}
.partner-logos{display:flex;justify-content:center;gap:30px;flex-wrap:wrap}
.partner-item{text-align:center;padding:20px 28px;background:rgba(255,255,255,.05);border-radius:10px;border:1px solid rgba(255,255,255,.1);min-width:150px;transition:all .3s}
.partner-item:hover{background:rgba(230,57,70,.1);border-color:rgba(230,57,70,.3)}
.partner-name{font-size:1.3rem;font-weight:700;color:#e63946;display:block;margin-bottom:6px}
.partner-item p{font-size:.78rem;color:#a8b2c1}

/* How-to Steps */
.howto-section{padding-bottom:60px}
.howto-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step-card{background:#fff;border-radius:12px;padding:32px 24px;text-align:center;box-shadow:0 2px 12px rgba(0,0,0,.06);position:relative;transition:all .3s}
.step-card:hover{transform:translateY(-4px);box-shadow:0 8px 28px rgba(0,0,0,.1)}
.step-num{font-size:2.4rem;font-weight:800;color:#e63946;opacity:.3;margin-bottom:12px}
.step-card h4{font-size:1.05rem;margin-bottom:10px;color:#1a1a2e}
.step-card p{font-size:.88rem;color:#666;line-height:1.6}

/* Share */
.share-section{background:#f0f1f6;padding:40px 0;text-align:center}
.share-section h3{margin-bottom:20px;color:#1a1a2e}
.share-btns{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
.share-btn{display:inline-block;padding:10px 24px;border-radius:8px;color:#fff;font-size:.9rem;font-weight:600;transition:all .2s}
.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;color:#fff}

/* Footer */
.site-footer{background:#0f0f1a;color:#a8b2c1;padding:50px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand{display:flex;flex-direction:column;gap:10px}
.footer-brand img{border-radius:6px}
.footer-logo-text{font-size:1.4rem;font-weight:800;color:#e63946}
.footer-brand p{font-size:.85rem;line-height:1.6;color:#777}
.footer-nav h4,.footer-contact h4,.footer-qrcode h4{color:#fff;font-size:.95rem;margin-bottom:14px}
.footer-nav ul,.footer-contact ul{list-style:none}
.footer-nav li,.footer-contact li{margin-bottom:8px}
.footer-nav a,.footer-contact a{color:#a8b2c1;font-size:.88rem;transition:color .2s}
.footer-nav a:hover,.footer-contact a:hover{color:#e63946}
.qr-group{display:flex;gap:16px}
.qr-item{text-align:center}
.qr-item img{border-radius:6px;margin-bottom:6px}
.qr-item span{font-size:.78rem;color:#888}
.footer-bottom{padding:20px 0;text-align:center;font-size:.82rem;color:#666}
.footer-tags{margin-top:10px;display:flex;justify-content:center;gap:8px;flex-wrap:wrap}
.footer-tags span{background:rgba(255,255,255,.05);padding:3px 10px;border-radius:4px;font-size:.75rem;color:#777}

/* Page Banner */
.page-banner{position:relative;min-height:280px;background-size:cover;background-position:center;display:flex;align-items:center}
.banner-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(26,26,46,.9),rgba(230,57,70,.2));display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:20px}
.banner-overlay h1{color:#fff;font-size:1.8rem;margin-bottom:12px}
.banner-overlay p{color:#c8cdd8;font-size:1rem}

/* Page Main */
.page-main{padding:40px 0 60px}
.page-main h1{font-size:1.8rem;color:#1a1a2e;margin-bottom:16px}
.page-main h2{font-size:1.4rem;color:#1a1a2e;margin:36px 0 16px;padding-bottom:10px;border-bottom:2px solid #e63946;display:inline-block}
.page-intro{font-size:1rem;color:#555;margin-bottom:30px;line-height:1.8}

/* Video Tags Cloud */
.video-tags-cloud{margin-top:40px;padding:24px;background:#fff;border-radius:12px;box-shadow:0 2px 10px rgba(0,0,0,.05)}
.video-tags-cloud h3{margin-bottom:14px;font-size:1.1rem;color:#1a1a2e}
.video-tags-cloud span{display:inline-block;padding:6px 16px;margin:4px;background:#f0f1f6;border-radius:20px;font-size:.85rem;color:#555;transition:all .2s;cursor:pointer}
.video-tags-cloud span:hover{background:#e63946;color:#fff}

/* Community Boards */
.community-boards{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-bottom:40px}
.board-card{background:#fff;border-radius:12px;padding:28px;box-shadow:0 2px 12px rgba(0,0,0,.06)}
.board-card h3{font-size:1.1rem;color:#1a1a2e;margin-bottom:10px}
.board-card>p{font-size:.9rem;color:#666;margin-bottom:12px;line-height:1.6}
.board-stats{display:flex;gap:16px;font-size:.82rem;color:#999;margin-bottom:14px}
.mini-topic{padding:10px 0;border-top:1px solid #f0f0f5;display:flex;justify-content:space-between;align-items:center;gap:10px}
.mini-topic strong{font-size:.88rem;color:#2d2d3a;flex:1}
.mini-topic span{font-size:.78rem;color:#999;white-space:nowrap}

/* Expert Cards */
.team-grid{display:flex;flex-direction:column;gap:30px}
.expert-card{display:flex;gap:28px;background:#fff;border-radius:14px;padding:28px;box-shadow:0 2px 14px rgba(0,0,0,.06);transition:all .3s}
.expert-card:hover{box-shadow:0 6px 28px rgba(0,0,0,.1)}
.expert-photo{width:200px;height:200px;border-radius:12px;object-fit:cover;flex-shrink:0}
.expert-info h3{font-size:1.2rem;color:#1a1a2e;margin-bottom:6px}
.expert-title{font-size:.88rem;color:#e63946;margin-bottom:12px}
.expert-info>p{font-size:.92rem;color:#555;line-height:1.7;margin-bottom:14px}
.expert-quals{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.expert-quals span{padding:4px 12px;background:#f0f1f6;border-radius:20px;font-size:.78rem;color:#666}
.expert-works{margin-bottom:16px}
.expert-works h5{font-size:.88rem;color:#1a1a2e;margin-bottom:8px}
.expert-works ul{list-style:none;padding-left:0}
.expert-works li{font-size:.85rem;color:#666;padding:3px 0;padding-left:16px;position:relative}
.expert-works li::before{content:'▸';position:absolute;left:0;color:#e63946}
.expert-btns{display:flex;gap:10px}
.btn-sm{padding:8px 20px;background:#e63946;color:#fff;border-radius:6px;font-size:.85rem;transition:all .2s}
.btn-sm:hover{background:#c1121f;color:#fff}
.btn-sm-outline{padding:8px 20px;border:1px solid #e63946;color:#e63946;border-radius:6px;font-size:.85rem;transition:all .2s}
.btn-sm-outline:hover{background:#e63946;color:#fff}

/* Service Grid */
.service-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-bottom:40px}
.service-card{background:#fff;border-radius:14px;padding:32px;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s}
.service-card:hover{transform:translateY(-3px);box-shadow:0 8px 28px rgba(0,0,0,.1)}
.service-icon{font-size:2.4rem;margin-bottom:14px}
.service-card h3{font-size:1.1rem;color:#1a1a2e;margin-bottom:10px}
.service-card p{font-size:.9rem;color:#666;line-height:1.7;margin-bottom:12px}
.service-card ul{list-style:none;padding:0}
.service-card li{padding:4px 0 4px 18px;font-size:.88rem;color:#555;position:relative}
.service-card li::before{content:'✓';position:absolute;left:0;color:#e63946;font-weight:700}

/* Plan Benefits */
.plan-benefits{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-bottom:40px}
.benefit-item{background:#fff;border-radius:10px;padding:24px;border-left:4px solid #e63946;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.benefit-item h4{font-size:1rem;color:#1a1a2e;margin-bottom:8px}
.benefit-item p{font-size:.88rem;color:#666;line-height:1.6}

/* CTA Box */
.cta-box{background:linear-gradient(135deg,#1a1a2e,#2a2a4e);border-radius:14px;padding:40px;text-align:center;color:#fff}
.cta-box h3{font-size:1.4rem;margin-bottom:12px}
.cta-box p{color:#a8b2c1;margin-bottom:24px;font-size:.95rem}

/* About */
.about-hero{margin-bottom:30px;border-radius:14px;overflow:hidden}
.about-img{width:100%;border-radius:14px}

/* Timeline */
.timeline{position:relative;padding-left:40px;margin-bottom:40px}
.timeline::before{content:'';position:absolute;left:14px;top:0;bottom:0;width:3px;background:#e63946;border-radius:2px}
.timeline-item{position:relative;margin-bottom:28px}
.timeline-item::before{content:'';position:absolute;left:-33px;top:6px;width:14px;height:14px;background:#e63946;border-radius:50%;border:3px solid #f5f6fa}
.timeline-year{font-size:1.1rem;font-weight:700;color:#e63946;margin-bottom:6px}
.timeline-content h4{font-size:1rem;color:#1a1a2e;margin-bottom:6px}
.timeline-content p{font-size:.88rem;color:#666;line-height:1.6}

/* Stats Grid */
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:40px}
.stat-card{background:#fff;border-radius:12px;padding:28px;text-align:center;box-shadow:0 2px 10px rgba(0,0,0,.05)}
.stat-big{display:block;font-size:2rem;font-weight:800;color:#e63946;margin-bottom:6px}
.stat-card span:last-child{font-size:.88rem;color:#666}

/* Contact Grid */
.contact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:40px}
.contact-card{background:#fff;border-radius:10px;padding:24px;text-align:center;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.contact-card h4{font-size:.95rem;color:#1a1a2e;margin-bottom:10px}
.contact-card p{font-size:.88rem;color:#666;margin-bottom:4px}

/* Disclaimer */
.disclaimer{background:#fff3f4;border-left:4px solid #e63946;border-radius:8px;padding:20px 24px;margin-bottom:30px}
.disclaimer p{font-size:.88rem;color:#666;line-height:1.7}

/* Lazy Loading Placeholder */
img.lazy{opacity:0;transition:opacity .4s}
img.lazy.loaded{opacity:1}

/* Mobile Responsive */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:768px){
  .main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#1a1a2e;padding:16px;z-index:99}
  .main-nav.open{display:block}
  .main-nav ul{flex-direction:column;gap:4px}
  .mobile-menu-btn{display:block}
  .hero-content h1{font-size:1.5rem}
  .hero-stats{gap:20px}
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .ai-grid{grid-template-columns:1fr}
  .topic-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .community-boards{grid-template-columns:1fr}
  .expert-card{flex-direction:column;align-items:center;text-align:center}
  .expert-photo{width:160px;height:160px}
  .service-grid{grid-template-columns:1fr}
  .plan-benefits{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .section-header h2{font-size:1.4rem}
  .page-main h1{font-size:1.4rem}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .hero-banner{min-height:400px}
  .stats-grid{grid-template-columns:1fr}
}