/* ========================================
   国产主播 修车改装视频社区 - 全站样式
   域名: tkpasw.cn
   ======================================== */

/* CSS Reset & Base */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:#1a1a2e;background:#f8f9fa;line-height:1.7;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:color .3s}
a:hover{color:#e63946}
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 Variables */
:root{
  --primary:#e63946;
  --primary-dark:#b71c1c;
  --secondary:#1d3557;
  --accent:#f77f00;
  --dark:#0d1117;
  --gray-900:#1a1a2e;
  --gray-700:#374151;
  --gray-500:#6b7280;
  --gray-300:#d1d5db;
  --gray-100:#f3f4f6;
  --white:#ffffff;
  --gradient-primary:linear-gradient(135deg,#e63946 0%,#f77f00 100%);
  --gradient-dark:linear-gradient(135deg,#1d3557 0%,#0d1117 100%);
  --shadow-sm:0 1px 3px rgba(0,0,0,.1);
  --shadow-md:0 4px 12px rgba(0,0,0,.12);
  --shadow-lg:0 10px 30px rgba(0,0,0,.15);
  --shadow-xl:0 20px 50px rgba(0,0,0,.2);
  --radius:12px;
  --radius-lg:20px;
}

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

/* ===== HEADER / NAV ===== */
.site-header{background:var(--dark);position:sticky;top:0;z-index:1000;box-shadow:var(--shadow-md)}
.header-top{display:flex;align-items:center;justify-content:space-between;padding:10px 0}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{width:48px;height:48px;border-radius:8px}
.logo-wrap .brand-name{font-size:1.5rem;font-weight:800;color:var(--white);letter-spacing:2px}
.logo-wrap .brand-name span{color:var(--primary)}

.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{color:rgba(255,255,255,.85);padding:12px 16px;font-size:.95rem;font-weight:500;transition:all .3s;position:relative}
.main-nav a::after{content:'';position:absolute;bottom:0;left:50%;width:0;height:3px;background:var(--primary);transition:all .3s;transform:translateX(-50%)}
.main-nav a:hover,.main-nav a.active{color:var(--white)}
.main-nav a:hover::after,.main-nav a.active::after{width:60%}

.mobile-toggle{display:none;background:none;border:none;color:var(--white);font-size:1.5rem;cursor:pointer;padding:8px}

/* Search Bar */
.search-bar{background:rgba(255,255,255,.06);border-bottom:1px solid rgba(255,255,255,.08);padding:10px 0}
.search-wrap{display:flex;align-items:center;max-width:600px;margin:0 auto;background:rgba(255,255,255,.1);border-radius:50px;overflow:hidden;border:1px solid rgba(255,255,255,.15)}
.search-wrap input{flex:1;background:transparent;border:none;padding:10px 20px;color:var(--white);font-size:.9rem;outline:none}
.search-wrap input::placeholder{color:rgba(255,255,255,.5)}
.search-wrap button{background:var(--primary);border:none;color:var(--white);padding:10px 24px;cursor:pointer;font-size:.9rem;font-weight:600;transition:background .3s}
.search-wrap button:hover{background:var(--primary-dark)}

/* ===== HERO BANNER ===== */
.hero-banner{position:relative;height:520px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hero-banner .hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.55)}
.hero-banner .hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,17,23,.3) 0%,rgba(13,17,23,.85) 100%)}
.hero-content{position:relative;z-index:2;text-align:center;max-width:800px;padding:0 20px}
.hero-content h1{font-size:2.8rem;color:var(--white);margin-bottom:16px;text-shadow:0 2px 10px rgba(0,0,0,.5)}
.hero-content h1 span{color:var(--primary)}
.hero-content p{color:rgba(255,255,255,.85);font-size:1.15rem;margin-bottom:28px;line-height:1.8}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:16px}
.hero-tags span{background:rgba(230,57,70,.2);color:var(--primary);padding:6px 16px;border-radius:50px;font-size:.85rem;border:1px solid rgba(230,57,70,.3)}

.btn-primary{display:inline-block;background:var(--gradient-primary);color:var(--white);padding:14px 36px;border-radius:50px;font-weight:700;font-size:1rem;transition:all .3s;box-shadow:0 4px 15px rgba(230,57,70,.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(230,57,70,.5);color:var(--white)}
.btn-outline{display:inline-block;border:2px solid var(--primary);color:var(--primary);padding:12px 32px;border-radius:50px;font-weight:600;font-size:.95rem;transition:all .3s}
.btn-outline:hover{background:var(--primary);color:var(--white)}

/* ===== SECTION COMMON ===== */
.section{padding:70px 0}
.section-dark{background:var(--dark);color:var(--white)}
.section-gray{background:var(--gray-100)}
.section-title{text-align:center;margin-bottom:50px}
.section-title h2{font-size:2rem;color:var(--gray-900);margin-bottom:12px;position:relative;display:inline-block}
.section-dark .section-title h2{color:var(--white)}
.section-title h2::after{content:'';display:block;width:60px;height:4px;background:var(--gradient-primary);margin:12px auto 0;border-radius:2px}
.section-title p{color:var(--gray-500);font-size:1rem;max-width:600px;margin:0 auto}
.section-dark .section-title p{color:rgba(255,255,255,.65)}

/* Breadcrumb */
.breadcrumb{padding:14px 0;font-size:.85rem;color:var(--gray-500);background:var(--white);border-bottom:1px solid var(--gray-300)}
.breadcrumb a{color:var(--primary)}
.breadcrumb span{margin:0 6px;color:var(--gray-300)}

/* ===== VIDEO CARD ===== */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.video-card{background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:all .35s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.video-card .thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#111}
.video-card .thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .thumb img{transform:scale(1.08)}
.video-card .play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(0);width:64px;height:64px;background:rgba(230,57,70,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all .35s;opacity:0}
.video-card:hover .play-btn{transform:translate(-50%,-50%) scale(1);opacity:1}
.play-btn::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}
.video-card .duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem}
.video-card .card-body{padding:16px}
.video-card .card-body h3{font-size:1rem;font-weight:600;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;align-items:center;gap:12px;color:var(--gray-500);font-size:.8rem}
.video-card .meta .views::before{content:'▶ '}
.video-card .meta .likes::before{content:'♥ '}
.video-card .tag{display:inline-block;background:rgba(230,57,70,.1);color:var(--primary);padding:2px 10px;border-radius:50px;font-size:.75rem;margin-top:8px}

/* ===== EXPERT CARD ===== */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:28px}
.expert-card{background:var(--white);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md);transition:all .35s;text-align:center}
.expert-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-xl)}
.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 .info{padding:24px}
.expert-card .info h4{font-size:1.15rem;margin-bottom:4px}
.expert-card .info .role{color:var(--primary);font-size:.85rem;font-weight:600;margin-bottom:10px}
.expert-card .info p{color:var(--gray-500);font-size:.85rem;line-height:1.6;margin-bottom:16px}
.expert-card .actions{display:flex;gap:10px;justify-content:center;padding:0 24px 24px}
.expert-card .actions a{flex:1;padding:8px 0;border-radius:8px;font-size:.85rem;font-weight:600;text-align:center}
.expert-card .actions .btn-sm-primary{background:var(--primary);color:var(--white)}
.expert-card .actions .btn-sm-outline{border:1px solid var(--gray-300);color:var(--gray-700)}

/* ===== FAQ ===== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--white);border-radius:var(--radius);margin-bottom:12px;box-shadow:var(--shadow-sm);overflow:hidden}
.faq-item .faq-q{padding:18px 24px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .3s}
.faq-item .faq-q:hover{background:var(--gray-100)}
.faq-item .faq-q::after{content:'+';font-size:1.3rem;color:var(--primary);transition:transform .3s}
.faq-item.active .faq-q::after{transform:rotate(45deg)}
.faq-item .faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:all .4s ease;color:var(--gray-500);line-height:1.8}
.faq-item.active .faq-a{padding:0 24px 18px;max-height:500px}

/* ===== REVIEW ===== */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.review-card{background:var(--white);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm);position:relative}
.review-card::before{content:'\201C';position:absolute;top:12px;left:20px;font-size:4rem;color:rgba(230,57,70,.15);font-family:Georgia,serif;line-height:1}
.review-card .stars{color:var(--accent);margin-bottom:12px;font-size:1.1rem;letter-spacing:2px}
.review-card p{color:var(--gray-700);font-size:.9rem;line-height:1.8;margin-bottom:16px;position:relative;z-index:1}
.review-card .reviewer{display:flex;align-items:center;gap:12px}
.review-card .reviewer .avatar-sm{width:40px;height:40px;border-radius:50%;background:var(--gradient-primary);display:flex;align-items:center;justify-content:center;color:var(--white);font-weight:700;font-size:.9rem}
.review-card .reviewer .name{font-weight:600;font-size:.9rem}
.review-card .reviewer .date{color:var(--gray-500);font-size:.75rem}

/* ===== PARTNER LOGOS ===== */
.partner-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center}
.partner-wall .partner-item{background:var(--white);padding:20px 30px;border-radius:var(--radius);box-shadow:var(--shadow-sm);font-size:1.1rem;font-weight:700;color:var(--gray-700);transition:all .3s;min-width:160px;text-align:center}
.partner-wall .partner-item:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);color:var(--primary)}

/* ===== CONTACT ===== */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:28px}
.contact-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);padding:28px;text-align:center}
.contact-card .icon{font-size:2.5rem;margin-bottom:12px}
.contact-card h4{margin-bottom:8px;font-size:1.05rem}
.contact-card p{color:rgba(255,255,255,.65);font-size:.9rem;line-height:1.7}

/* ===== AI FEATURE ===== */
.ai-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.ai-card{background:var(--white);border-radius:var(--radius);padding:32px 24px;text-align:center;box-shadow:var(--shadow-sm);transition:all .35s;border:1px solid transparent}
.ai-card:hover{border-color:var(--primary);box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.ai-card .ai-icon{width:64px;height:64px;margin:0 auto 16px;background:var(--gradient-primary);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.8rem;color:var(--white)}
.ai-card h4{font-size:1.05rem;margin-bottom:8px}
.ai-card p{color:var(--gray-500);font-size:.85rem;line-height:1.7}

/* ===== COMMUNITY TOPICS ===== */
.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}
.topic-card{background:var(--white);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm);transition:all .3s;border-left:4px solid var(--primary)}
.topic-card:hover{box-shadow:var(--shadow-md);transform:translateX(4px)}
.topic-card h4{font-size:1rem;margin-bottom:6px}
.topic-card .topic-meta{color:var(--gray-500);font-size:.8rem}

/* ===== HOW TO JOIN ===== */
.steps-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px;counter-reset:step}
.step-card{background:var(--white);border-radius:var(--radius);padding:32px 24px;text-align:center;box-shadow:var(--shadow-sm);position:relative;counter-increment:step}
.step-card::before{content:counter(step);position:absolute;top:-16px;left:50%;transform:translateX(-50%);width:36px;height:36px;background:var(--gradient-primary);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--white);font-weight:800;font-size:1rem;line-height:36px}
.step-card h4{margin-top:8px;margin-bottom:8px;font-size:1rem}
.step-card p{color:var(--gray-500);font-size:.85rem;line-height:1.6}

/* ===== SHARE BUTTONS ===== */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:50px;font-size:.85rem;font-weight:600;color:var(--white);transition:all .3s}
.share-btn:hover{transform:translateY(-2px);opacity:.9;color:var(--white)}
.share-btn.wechat{background:#07c160}
.share-btn.weibo{background:#e6162d}
.share-btn.douyin{background:#161823}
.share-btn.bilibili{background:#00a1d6}

/* ===== FOOTER ===== */
.site-footer{background:var(--dark);color:rgba(255,255,255,.7);padding:50px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:40px;margin-bottom:40px}
.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:30px;height:3px;background:var(--primary);border-radius:2px}
.footer-col p,.footer-col a{font-size:.85rem;line-height:2;color:rgba(255,255,255,.6);display:block}
.footer-col a:hover{color:var(--primary)}
.footer-col .qr-img{width:120px;height:120px;border-radius:8px;margin-top:8px;border:2px solid rgba(255,255,255,.1)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;text-align:center;font-size:.8rem;color:rgba(255,255,255,.4)}
.footer-bottom a{color:var(--primary)}

/* ===== MCP PLACEHOLDER ===== */
.mcp-widget{background:rgba(255,255,255,.03);border:1px dashed rgba(255,255,255,.15);border-radius:var(--radius);padding:20px;margin-top:20px;text-align:center;font-size:.8rem;color:rgba(255,255,255,.35)}

/* ===== MEDIA SECTION ===== */
.media-tabs{display:flex;gap:8px;justify-content:center;margin-bottom:30px;flex-wrap:wrap}
.media-tabs .tab{padding:8px 22px;border-radius:50px;font-size:.9rem;font-weight:600;cursor:pointer;transition:all .3s;background:var(--gray-100);color:var(--gray-700)}
.media-tabs .tab.active,.media-tabs .tab:hover{background:var(--primary);color:var(--white)}

/* ===== STATS BAR ===== */
.stats-bar{background:var(--gradient-dark);padding:40px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat-item .num{font-size:2.5rem;font-weight:800;color:var(--primary);display:block}
.stat-item .label{color:rgba(255,255,255,.65);font-size:.9rem;margin-top:4px}

/* ===== RESPONSIVE ===== */
@media(max-width:1024px){
  .hero-content h1{font-size:2.2rem}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--dark);flex-direction:column;padding:10px 0;box-shadow:var(--shadow-lg)}
  .main-nav.open{display:flex}
  .mobile-toggle{display:block}
  .hero-banner{height:420px}
  .hero-content h1{font-size:1.8rem}
  .hero-content p{font-size:1rem}
  .section{padding:50px 0}
  .section-title h2{font-size:1.6rem}
  .video-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .stat-item .num{font-size:1.8rem}
  .contact-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
  .hero-banner{height:360px}
  .hero-content h1{font-size:1.5rem}
  .footer-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .header-top{padding:8px 0}
  .logo-wrap .brand-name{font-size:1.2rem}
}

/* Lazy Load */
img.lazy{opacity:1;transition:opacity .5s}
img.lazy.loaded{opacity:1}

/* Animations */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.fade-in{animation:fadeInUp .6s ease forwards;opacity:0}

/* Print */
@media print{.site-header,.search-bar,.site-footer,.share-bar{display:none}}