/* ============================================
   女神视频 - 原创CSS样式
   配色方案：赛车红 #C41E3A + 碳灰 #1A1A2E + 银色 #C0C0C0
   ============================================ */
*{margin:0;padding:0;box-sizing:border-box}
:root{--racing-red:#C41E3A;--carbon:#1A1A2E;--carbon-light:#2D2D44;--silver:#C0C0C0;--silver-light:#E8E8E8;--white:#FFFFFF;--text-dark:#1A1A2E;--text-gray:#6B7280;--accent-orange:#FF6B35;--bg-dark:#0F0F1A;--bg-section:#F5F5F8;--shadow:0 4px 20px rgba(26,26,46,0.12);--shadow-hover:0 8px 32px rgba(196,30,58,0.18);--radius:12px;--transition:all 0.35s cubic-bezier(0.4,0,0.2,1)}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--text-dark);background:var(--white);line-height:1.7;overflow-x:hidden}
a{color:var(--racing-red);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--accent-orange)}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* 导航栏 */
.site-header{background:var(--carbon);position:sticky;top:0;z-index:1000;box-shadow:0 2px 12px rgba(0,0,0,0.3)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;padding:0 20px;max-width:1200px;margin:0 auto;height:68px}
.nav-logo{display:flex;align-items:center;gap:10px}
.nav-logo img{height:42px;width:42px;border-radius:50%;border:2px solid var(--racing-red)}
.nav-logo span{color:var(--white);font-size:1.3rem;font-weight:700;letter-spacing:1px}
.nav-menu{display:flex;list-style:none;gap:6px}
.nav-menu li a{color:var(--silver-light);padding:8px 14px;border-radius:6px;font-size:0.92rem;transition:var(--transition);display:block}
.nav-menu li a:hover,.nav-menu li a.active{background:var(--racing-red);color:var(--white)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.nav-toggle span{width:26px;height:3px;background:var(--white);border-radius:2px;transition:var(--transition)}

/* 搜索框 */
.search-bar{background:var(--carbon-light);padding:12px 0;border-bottom:1px solid rgba(192,192,192,0.1)}
.search-wrap{max-width:680px;margin:0 auto;display:flex;gap:0;padding:0 20px}
.search-wrap input{flex:1;padding:10px 18px;border:2px solid transparent;border-radius:8px 0 0 8px;font-size:0.95rem;background:var(--white);outline:none;transition:var(--transition)}
.search-wrap input:focus{border-color:var(--racing-red)}
.search-wrap button{padding:10px 24px;background:var(--racing-red);color:var(--white);border:none;border-radius:0 8px 8px 0;font-size:0.95rem;cursor:pointer;transition:var(--transition);white-space:nowrap}
.search-wrap button:hover{background:var(--accent-orange)}

/* Hero Banner */
.hero{position:relative;height:520px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(0.55)}
.hero-content{position:relative;z-index:2;text-align:center;color:var(--white);padding:0 20px}
.hero-content h1{font-size:2.8rem;font-weight:800;margin-bottom:16px;text-shadow:0 3px 12px rgba(0,0,0,0.5);line-height:1.3}
.hero-content p{font-size:1.15rem;max-width:680px;margin:0 auto 28px;opacity:0.92;text-shadow:0 2px 8px rgba(0,0,0,0.4)}
.hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:16px}
.hero-tags span{background:rgba(196,30,58,0.85);padding:6px 16px;border-radius:20px;font-size:0.85rem;backdrop-filter:blur(4px)}
.btn-primary{display:inline-block;background:var(--racing-red);color:var(--white);padding:14px 36px;border-radius:8px;font-size:1.05rem;font-weight:600;transition:var(--transition);border:none;cursor:pointer}
.btn-primary:hover{background:var(--accent-orange);color:var(--white);transform:translateY(-2px);box-shadow:var(--shadow-hover)}

/* 区块通用 */
.section{padding:60px 0}
.section-alt{background:var(--bg-section)}
.section-dark{background:var(--bg-dark);color:var(--white)}
.section-title{text-align:center;margin-bottom:42px}
.section-title h2{font-size:2rem;font-weight:700;margin-bottom:10px;position:relative;display:inline-block}
.section-title h2::after{content:'';position:absolute;bottom:-8px;left:50%;transform:translateX(-50%);width:60px;height:4px;background:var(--racing-red);border-radius:2px}
.section-title p{color:var(--text-gray);font-size:1rem;margin-top:16px}
.section-dark .section-title p{color:var(--silver)}

/* 视频卡片网格 */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:var(--transition);position:relative}
.video-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.video-thumb{position:relative;overflow:hidden;aspect-ratio:16/9;cursor:pointer}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:var(--transition)}
.video-card:hover .video-thumb img{transform:scale(1.06)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(0);width:64px;height:64px;background:rgba(196,30,58,0.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:var(--transition);opacity:0}
.play-btn::after{content:'';width:0;height:0;border-style:solid;border-width:12px 0 12px 22px;border-color:transparent transparent transparent var(--white);margin-left:4px}
.video-card:hover .play-btn{transform:translate(-50%,-50%) scale(1);opacity:1}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,0.78);color:var(--white);padding:2px 8px;border-radius:4px;font-size:0.78rem}
.video-info{padding:16px}
.video-info h3{font-size:1rem;font-weight:600;margin-bottom:6px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;align-items:center;gap:12px;color:var(--text-gray);font-size:0.82rem}
.video-meta span{display:flex;align-items:center;gap:4px}
.section-dark .video-card{background:var(--carbon-light)}
.section-dark .video-info h3{color:var(--white)}

/* 分类标签 */
.cat-tabs{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:32px}
.cat-tabs span{padding:8px 20px;border-radius:24px;font-size:0.9rem;cursor:pointer;transition:var(--transition);border:2px solid var(--silver);color:var(--text-gray)}
.cat-tabs span:hover,.cat-tabs span.active{background:var(--racing-red);color:var(--white);border-color:var(--racing-red)}

/* 专家卡片 */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.expert-card{background:var(--white);border-radius:var(--radius);padding:28px;text-align:center;box-shadow:var(--shadow);transition:var(--transition)}
.expert-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.expert-card img{width:96px;height:96px;border-radius:50%;margin:0 auto 16px;object-fit:cover;border:3px solid var(--racing-red)}
.expert-card h4{font-size:1.1rem;margin-bottom:4px}
.expert-card .role{color:var(--racing-red);font-size:0.88rem;margin-bottom:10px}
.expert-card p{color:var(--text-gray);font-size:0.88rem;line-height:1.6;margin-bottom:14px}
.expert-links{display:flex;justify-content:center;gap:10px}
.expert-links a{padding:6px 16px;border-radius:6px;font-size:0.82rem;border:1px solid var(--racing-red);color:var(--racing-red);transition:var(--transition)}
.expert-links a:hover{background:var(--racing-red);color:var(--white)}

/* AI赋能 */
.ai-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:24px}
.ai-card{background:linear-gradient(135deg,var(--carbon) 0%,var(--carbon-light) 100%);border-radius:var(--radius);padding:28px;color:var(--white);transition:var(--transition);border:1px solid rgba(192,192,192,0.1)}
.ai-card:hover{transform:translateY(-4px);border-color:var(--racing-red)}
.ai-icon{width:52px;height:52px;background:var(--racing-red);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:16px}
.ai-card h4{font-size:1.05rem;margin-bottom:8px}
.ai-card p{color:var(--silver);font-size:0.88rem;line-height:1.6}

/* 合作品牌 */
.brand-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:32px;align-items:center;padding:20px 0}
.brand-wall span{font-size:1.2rem;font-weight:700;color:var(--text-gray);opacity:0.6;transition:var(--transition);padding:12px 20px;border:1px solid var(--silver);border-radius:8px}
.brand-wall span:hover{opacity:1;border-color:var(--racing-red);color:var(--racing-red)}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid #E5E7EB;border-radius:var(--radius);margin-bottom:12px;overflow:hidden}
.faq-q{padding:18px 24px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:var(--transition);font-size:0.98rem}
.faq-q:hover{background:rgba(196,30,58,0.05)}
.faq-q::after{content:'+';font-size:1.4rem;color:var(--racing-red);transition:var(--transition)}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:max-height 0.4s ease;color:var(--text-gray);font-size:0.92rem;line-height:1.7}
.faq-item.open .faq-a{padding:0 24px 18px;max-height:400px}

/* 用户评论 */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.review-card{background:var(--white);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);border-left:4px solid var(--racing-red)}
.review-stars{color:#F59E0B;margin-bottom:8px;font-size:0.9rem;letter-spacing:2px}
.review-card p{color:var(--text-gray);font-size:0.9rem;line-height:1.6;margin-bottom:12px;font-style:italic}
.review-author{font-weight:600;font-size:0.88rem;color:var(--text-dark)}

/* How-To */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:24px;counter-reset:step}
.howto-step{text-align:center;padding:24px;counter-increment:step}
.howto-step::before{content:counter(step);display:flex;width:48px;height:48px;background:var(--racing-red);color:var(--white);border-radius:50%;align-items:center;justify-content:center;font-size:1.3rem;font-weight:700;margin:0 auto 16px}
.howto-step h4{margin-bottom:8px;font-size:1rem}
.howto-step p{color:var(--text-gray);font-size:0.88rem}

/* 联系我们 */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.contact-card{background:var(--white);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);text-align:center}
.contact-card h4{margin-bottom:8px;color:var(--racing-red)}
.contact-card p{color:var(--text-gray);font-size:0.9rem}
.qr-wrap{display:flex;justify-content:center;gap:32px;flex-wrap:wrap;margin-top:20px}
.qr-item{text-align:center}
.qr-item img{width:140px;height:140px;border-radius:8px;margin-bottom:8px;border:2px solid var(--silver)}
.qr-item p{font-size:0.85rem;color:var(--text-gray)}

/* 社交分享 */
.share-bar{display:flex;justify-content:center;gap:12px;padding:20px 0}
.share-btn{width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--white);font-size:0.85rem;font-weight:700;transition:var(--transition);cursor:pointer}
.share-btn:hover{transform:scale(1.15)}
.share-wx{background:#07C160}.share-wb{background:#E6162D}.share-dy{background:#000}.share-bl{background:#00A1D6}

/* 页脚 */
.site-footer{background:var(--bg-dark);color:var(--silver);padding:48px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:32px;margin-bottom:32px}
.footer-col h4{color:var(--white);font-size:1rem;margin-bottom:16px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:36px;height:3px;background:var(--racing-red);border-radius:2px}
.footer-col p,.footer-col a{color:var(--silver);font-size:0.88rem;line-height:2}
.footer-col a:hover{color:var(--racing-red)}
.footer-col ul{list-style:none}
.footer-col ul li a{display:block}
.footer-bottom{border-top:1px solid rgba(192,192,192,0.15);padding:20px 0;text-align:center;font-size:0.82rem;color:var(--text-gray)}
.footer-logo{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.footer-logo img{width:36px;height:36px;border-radius:50%}
.footer-logo span{color:var(--white);font-weight:700;font-size:1.1rem}

/* 面包屑 */
.breadcrumb{padding:14px 0;font-size:0.85rem;color:var(--text-gray)}
.breadcrumb a{color:var(--racing-red)}
.breadcrumb span{margin:0 6px}

/* 回到顶部 */
.back-top{position:fixed;bottom:30px;right:30px;width:46px;height:46px;background:var(--racing-red);color:var(--white);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.2rem;cursor:pointer;opacity:0;visibility:hidden;transition:var(--transition);z-index:999;box-shadow:0 4px 16px rgba(196,30,58,0.3)}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{background:var(--accent-orange);transform:translateY(-3px)}

/* 内页通用 */
.page-hero{background:var(--carbon);padding:48px 0;text-align:center;color:var(--white)}
.page-hero h1{font-size:2.2rem;font-weight:700;margin-bottom:8px}
.page-hero p{color:var(--silver);font-size:1rem}
.page-content{padding:48px 0}

/* 干扰标签隐藏 */
/* 响应式 */
@media(max-width:768px){
  .nav-menu{display:none;position:absolute;top:68px;left:0;right:0;background:var(--carbon);flex-direction:column;padding:16px;gap:4px}
  .nav-menu.open{display:flex}
  .nav-toggle{display:flex}
  .hero{height:380px}
  .hero-content h1{font-size:1.8rem}
  .section{padding:40px 0}
  .section-title h2{font-size:1.5rem}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
  .expert-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
  .search-wrap{padding:0 16px}
}
@media(max-width:480px){
  .hero{height:300px}
  .hero-content h1{font-size:1.4rem}
  .video-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .nav-logo span{font-size:1rem}
  .qr-wrap{flex-direction:column;align-items:center}
}