/* ============================================
   抖阴 修车改装视频社区 - 原创样式表
   品牌：抖阴 | 域名：tw237305.cn
   ============================================ */

/* === CSS Variables === */
:root {
  --primary: #1a1a2e;
  --accent-red: #e94560;
  --accent-gold: #f5a623;
  --bg-dark: #0f0f1a;
  --text-light: #e8e8e8;
  --card-bg: #16213e;
  --card-hover: #1a2744;
  --border-subtle: rgba(233,69,96,0.2);
  --gradient-hero: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 50%, #16213e 100%);
  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-hover: 0 8px 40px rgba(233,69,96,0.15);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
  --font-main: 'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
}

/* === Reset & Base === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-main);background:var(--bg-dark);color:var(--text-light);line-height:1.7;overflow-x:hidden}
a{color:var(--accent-gold);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--accent-red)}
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}

/* === Container === */
.container{max-width:1280px;margin:0 auto;padding:0 20px}
.container-wide{max-width:1440px;margin:0 auto;padding:0 20px}

/* === Header / Navigation === */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(15,15,26,0.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-subtle);transition:var(--transition)}
.site-header.scrolled{background:rgba(15,15,26,0.98);box-shadow:0 2px 20px rgba(0,0,0,0.5)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;max-width:1440px;margin:0 auto;padding:0 24px}
.logo{display:flex;align-items:center;gap:10px}
.logo img{width:48px;height:48px;border-radius:50%}
.logo span{font-size:1.6rem;font-weight:800;color:#fff;letter-spacing:1px}
.logo .xv8uq38c{font-size:0.7rem;color:var(--accent-gold);display:block;letter-spacing:2px;text-transform:uppercase}
.nav-main{display:flex;gap:4px}
.nav-main a{padding:8px 16px;border-radius:var(--radius-sm);font-size:0.92rem;color:var(--text-light);font-weight:500;transition:var(--transition)}
.nav-main a:hover,.nav-main a.active{color:#fff;background:rgba(233,69,96,0.15)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--text-light);transition:var(--transition)}

/* === Search Bar === */
.search-bar{background:var(--primary);padding:12px 0;border-bottom:1px solid rgba(255,255,255,0.05)}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;max-width:640px;width:100%;background:var(--card-bg);border-radius:40px;overflow:hidden;border:1px solid var(--border-subtle)}
.search-box input{flex:1;padding:12px 24px;background:transparent;border:none;color:var(--text-light);font-size:0.95rem;outline:none}
.search-box input::placeholder{color:rgba(232,232,232,0.4)}
.search-box button{padding:12px 28px;background:var(--accent-red);color:#fff;border:none;cursor:pointer;font-size:0.92rem;font-weight:600;transition:var(--transition)}
.search-box button:hover{background:#d63a52}

/* === Hero / Banner === */
.hero-banner{position:relative;min-height:80vh;display:flex;align-items:center;justify-content:center;overflow:hidden;margin-top:72px}
.hero-banner .xbhyegk96{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(0.4)}
.hero-banner .x9ya08{position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,15,26,0.3) 0%,rgba(15,15,26,0.8) 100%)}
.hero-content{position:relative;z-index:2;text-align:center;max-width:800px;padding:40px 20px}
.hero-content h1{font-size:3.2rem;margin-bottom:16px;text-shadow:0 2px 20px rgba(0,0,0,0.5)}
.hero-content h1 .x7z73bnz{color:var(--accent-red);font-size:4rem}
.hero-content p{font-size:1.15rem;color:rgba(232,232,232,0.85);margin-bottom:32px;line-height:1.8}
.hero-content .hero-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:24px}
.hero-content .hero-tags span{padding:6px 16px;background:rgba(233,69,96,0.15);border:1px solid var(--border-subtle);border-radius:20px;font-size:0.85rem;color:var(--accent-gold)}
.btn-primary{display:inline-block;padding:14px 36px;background:var(--accent-red);color:#fff;border-radius:40px;font-weight:600;font-size:1rem;transition:var(--transition);border:none;cursor:pointer}
.btn-primary:hover{background:#d63a52;transform:translateY(-2px);box-shadow:0 8px 30px rgba(233,69,96,0.3);color:#fff}
.btn-outline{display:inline-block;padding:14px 36px;border:2px solid var(--accent-gold);color:var(--accent-gold);border-radius:40px;font-weight:600;font-size:1rem;transition:var(--transition);background:transparent}
.btn-outline:hover{background:var(--accent-gold);color:var(--bg-dark)}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* === Section Common === */
.section{padding:80px 0}
.section-alt{background:var(--primary)}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:2.2rem;margin-bottom:12px}
.section-title h2 .hl{color:var(--accent-red)}
.section-title p{color:rgba(232,232,232,0.6);font-size:1rem;max-width:600px;margin:0 auto}
.section-title .tag{display:inline-block;padding:4px 14px;background:rgba(245,166,35,0.1);color:var(--accent-gold);border-radius:20px;font-size:0.8rem;margin-bottom:12px;letter-spacing:1px}

/* === Video Card Grid === */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.video-card{background:var(--card-bg);border-radius:var(--radius);overflow:hidden;transition:var(--transition);border:1px solid transparent;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:var(--border-subtle)}
.video-card .thumb{position:relative;padding-top:56.25%;overflow:hidden}
.video-card .thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:var(--transition)}
.video-card:hover .thumb img{transform:scale(1.05)}
.video-card .x5br44{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,0.4);opacity:0;transition:var(--transition)}
.video-card:hover .x5br44{opacity:1}
.x5br44 .x9f046q{width:60px;height:60px;background:rgba(233,69,96,0.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:var(--transition)}
.x5br44 .x9f046q::after{content:'';display:block;width:0;height:0;border-style:solid;border-width:12px 0 12px 20px;border-color:transparent transparent transparent #fff;margin-left:4px}
.x5br44 .x9f046q:hover{transform:scale(1.1);background:var(--accent-red)}
.video-card .card-body{padding:16px}
.video-card .card-body h3{font-size:1rem;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-card .card-meta{display:flex;align-items:center;gap:16px;font-size:0.8rem;color:rgba(232,232,232,0.5)}
.video-card .card-meta span{display:flex;align-items:center;gap:4px}
.video-card .duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,0.75);padding:2px 8px;border-radius:4px;font-size:0.75rem;color:#fff}
.video-card .x0hj3adhr{position:absolute;top:8px;left:8px;background:var(--accent-red);padding:2px 10px;border-radius:4px;font-size:0.72rem;color:#fff;font-weight:600}

/* === Expert Card === */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.expert-card{background:var(--card-bg);border-radius:var(--radius);padding:32px 24px;text-align:center;transition:var(--transition);border:1px solid transparent}
.expert-card:hover{border-color:var(--border-subtle);box-shadow:var(--shadow-hover);transform:translateY(-4px)}
.expert-card .avatar{width:100px;height:100px;border-radius:50%;margin:0 auto 16px;overflow:hidden;border:3px solid var(--accent-gold)}
.expert-card .avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h4{font-size:1.1rem;margin-bottom:4px}
.expert-card .role{color:var(--accent-gold);font-size:0.85rem;margin-bottom:12px}
.expert-card p{font-size:0.88rem;color:rgba(232,232,232,0.6);margin-bottom:16px;line-height:1.6}
.expert-card .expert-links{display:flex;gap:8px;justify-content:center}
.expert-card .expert-links a{padding:6px 16px;border-radius:20px;font-size:0.8rem;border:1px solid var(--border-subtle);color:var(--text-light);transition:var(--transition)}
.expert-card .expert-links a:hover{background:var(--accent-red);border-color:var(--accent-red);color:#fff}

/* === FAQ Section === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--card-bg);border-radius:var(--radius-sm);margin-bottom:12px;overflow:hidden;border:1px solid transparent;transition:var(--transition)}
.faq-item:hover{border-color:var(--border-subtle)}
.faq-item .faq-q{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-item .faq-q:hover{color:var(--accent-gold)}
.faq-item .faq-q .arrow{transition:var(--transition);color:var(--accent-red);font-size:1.2rem}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-item .faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:max-height 0.4s ease,padding 0.4s ease;font-size:0.9rem;color:rgba(232,232,232,0.7);line-height:1.8}
.faq-item.open .faq-a{max-height:300px;padding:0 24px 18px}

/* === Reviews === */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px}
.review-card{background:var(--card-bg);border-radius:var(--radius);padding:24px;border:1px solid transparent;transition:var(--transition)}
.review-card:hover{border-color:var(--border-subtle);box-shadow:var(--shadow-hover)}
.review-card .stars{color:var(--accent-gold);font-size:1rem;margin-bottom:12px;letter-spacing:2px}
.review-card .review-text{font-size:0.92rem;color:rgba(232,232,232,0.75);line-height:1.7;margin-bottom:16px;font-style:italic}
.review-card .reviewer{display:flex;align-items:center;gap:12px}
.review-card .reviewer .r-avatar{width:40px;height:40px;border-radius:50%;background:var(--accent-red);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:0.9rem;color:#fff}
.review-card .reviewer .r-info .r-name{font-weight:600;font-size:0.9rem}
.review-card .reviewer .r-info .r-date{font-size:0.78rem;color:rgba(232,232,232,0.4)}

/* === Partner Logo Wall === */
.x8ap6pf{display:flex;flex-wrap:wrap;gap:24px;justify-content:center;align-items:center}
.x8ap6pf .xntvs4b02{background:var(--card-bg);padding:20px 32px;border-radius:var(--radius-sm);font-size:1rem;font-weight:700;color:rgba(232,232,232,0.5);transition:var(--transition);border:1px solid transparent}
.x8ap6pf .xntvs4b02:hover{border-color:var(--accent-gold);color:var(--accent-gold)}

/* === Footer === */
.site-footer{background:var(--primary);border-top:1px solid var(--border-subtle);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:40px;margin-bottom:40px}
.footer-col h4{font-size:1rem;margin-bottom:16px;color:var(--accent-gold)}
.footer-col p,.footer-col a{font-size:0.88rem;color:rgba(232,232,232,0.6);line-height:1.8}
.footer-col a:hover{color:var(--accent-red)}
.footer-col .xdtv7d5{display:flex;gap:16px;margin-top:12px}
.footer-col .xdtv7d5 img{width:120px;height:120px;border-radius:var(--radius-sm);border:1px solid var(--border-subtle)}
.footer-col .xwzn25u7t{display:flex;gap:12px;margin-top:12px}
.footer-col .xwzn25u7t a{width:36px;height:36px;border-radius:50%;background:var(--card-bg);display:flex;align-items:center;justify-content:center;font-size:0.85rem;color:var(--text-light);transition:var(--transition);border:1px solid var(--border-subtle)}
.footer-col .xwzn25u7t a:hover{background:var(--accent-red);border-color:var(--accent-red)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.05);padding:20px 0;text-align:center;font-size:0.82rem;color:rgba(232,232,232,0.4)}

/* === Breadcrumb === */
.breadcrumb{padding:16px 0;font-size:0.85rem;color:rgba(232,232,232,0.5)}
.breadcrumb a{color:var(--accent-gold)}
.breadcrumb span{margin:0 8px}

/* === Page Hero (Inner Pages) === */
.page-hero{position:relative;min-height:320px;display:flex;align-items:center;margin-top:72px;overflow:hidden}
.page-hero .xbhyegk96{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(0.3)}
.page-hero .x9ya08{position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,15,26,0.4) 0%,rgba(15,15,26,0.9) 100%)}
.page-hero .hero-content{position:relative;z-index:2;padding:40px 20px}
.page-hero h1{font-size:2.4rem;margin-bottom:8px}
.page-hero p{color:rgba(232,232,232,0.7);font-size:1rem}

/* === Content Section === */
.content-section{padding:60px 0}
.content-section h2{font-size:1.8rem;margin-bottom:20px;color:#fff}
.content-section h3{font-size:1.3rem;margin-bottom:12px;color:var(--accent-gold)}
.content-section p{margin-bottom:16px;color:rgba(232,232,232,0.75);line-height:1.8}

/* === Share Buttons === */
.x8gvuub{display:flex;gap:10px;flex-wrap:wrap;margin:24px 0}
.x8gvuub a{padding:8px 18px;border-radius:20px;font-size:0.82rem;color:#fff;transition:var(--transition);font-weight:500}
.x8gvuub .xwziuu68{background:#07c160}
.x8gvuub .xj95gydtp{background:#e6162d}
.x8gvuub .xi0ds5p1{background:#161823}
.x8gvuub .xa4eyc{background:#00a1d6}
.x8gvuub a:hover{opacity:0.85;transform:translateY(-2px);color:#fff}

/* === AI Feature Section === */
.ai-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.ai-card{background:var(--card-bg);border-radius:var(--radius);padding:28px;text-align:center;transition:var(--transition);border:1px solid transparent}
.ai-card:hover{border-color:var(--accent-gold);box-shadow:var(--shadow-hover);transform:translateY(-4px)}
.ai-card .ai-icon{font-size:2.5rem;margin-bottom:16px}
.ai-card h4{font-size:1.05rem;margin-bottom:8px}
.ai-card p{font-size:0.88rem;color:rgba(232,232,232,0.6);line-height:1.6}

/* === How-To Guide === */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:24px;margin-top:32px}
.howto-step{background:var(--card-bg);border-radius:var(--radius);padding:28px;text-align:center;position:relative;transition:var(--transition)}
.howto-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.howto-step .step-num{width:48px;height:48px;border-radius:50%;background:var(--accent-red);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.2rem;color:#fff;margin:0 auto 16px}
.howto-step h4{margin-bottom:8px;font-size:1rem}
.howto-step p{font-size:0.88rem;color:rgba(232,232,232,0.6)}

/* === Contact Info === */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.contact-card{background:var(--card-bg);border-radius:var(--radius);padding:28px;transition:var(--transition);border:1px solid transparent}
.contact-card:hover{border-color:var(--border-subtle)}
.contact-card h4{font-size:1rem;margin-bottom:12px;color:var(--accent-gold)}
.contact-card p{font-size:0.9rem;color:rgba(232,232,232,0.65);line-height:1.8}

/* === Card Tags === */
.card-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.card-tags span{padding:2px 10px;background:rgba(245,166,35,0.1);color:var(--accent-gold);border-radius:12px;font-size:0.72rem;border:1px solid rgba(245,166,35,0.2)}

/* === Card Description === */
.card-desc{font-size:0.85rem;color:rgba(232,232,232,0.6);line-height:1.6;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* === Topic Grid === */
.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}

/* === Image Load Transition === */
img{transition:opacity 0.3s ease}

/* === Responsive === */
@media(max-width:1024px){
  .hero-content h1{font-size:2.4rem}
  .hero-content h1 .x7z73bnz{font-size:3rem}
  .section{padding:60px 0}
}
@media(max-width:768px){
  .nav-main{display:none;position:absolute;top:72px;left:0;width:100%;background:rgba(15,15,26,0.98);flex-direction:column;padding:16px;gap:4px;border-bottom:1px solid var(--border-subtle)}
  .nav-main.open{display:flex}
  .nav-toggle{display:flex}
  .hero-content h1{font-size:1.8rem}
  .hero-content h1 .x7z73bnz{font-size:2.2rem}
  .hero-content p{font-size:1rem}
  .video-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .header-inner{padding:0 16px}
  .section{padding:40px 0}
  .section-title h2{font-size:1.6rem}
  .page-hero{min-height:240px}
  .page-hero h1{font-size:1.8rem}
}
@media(max-width:480px){
  .hero-content h1{font-size:1.5rem}
  .hero-content h1 .x7z73bnz{font-size:1.8rem}
  .btn-primary,.btn-outline{padding:12px 24px;font-size:0.9rem}
  .search-box input{padding:10px 16px}
  .search-box button{padding:10px 20px}
  .hero-btns{flex-direction:column;align-items:center}
  .hero-tags{gap:6px}
  .hero-tags span{font-size:0.75rem;padding:4px 10px}
  .x8ap6pf{gap:12px}
  .x8ap6pf .xntvs4b02{padding:12px 20px;font-size:0.85rem}
  .ai-features{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .topic-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .x8gvuub{flex-direction:column;align-items:center}
  .xdtv7d5{flex-direction:column;align-items:center}
}