/* ============================================
   麻豆传媒 KunKunTu - 原创朋克风格汽车改装社区
   配色：深灰底 #1a1a2e / 橙色主色 #e94d1a / 紫色辅色 #7b2ff7 / 浅灰文字 #d4d4d8
   ============================================ */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg-dark:#1a1a2e;--bg-card:#16213e;--bg-card2:#0f3460;
  --orange:#e94d1a;--orange-light:#ff6b35;--purple:#7b2ff7;--purple-dark:#533483;
  --text:#d4d4d8;--text-light:#a1a1aa;--white:#f4f4f5;--border:#2d2d44;
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'Helvetica Neue',Arial,'PingFang SC','Microsoft YaHei',sans-serif;background:var(--bg-dark);color:var(--text);line-height:1.7;overflow-x:hidden}
a{color:var(--orange);text-decoration:none;transition:color .3s}
a:hover{color:var(--orange-light)}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* 隐藏干扰标签 */
.jrb-wrap{position:absolute;width:0;height:0;overflow:hidden;opacity:0;pointer-events:none;z-index:-9999}

/* ========== 顶部导航 ========== */
.top-nav{background:rgba(22,33,62,.97);position:sticky;top:0;z-index:1000;border-bottom:2px solid var(--orange);backdrop-filter:blur(10px)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.nav-logo{display:flex;align-items:center;gap:10px}
.nav-logo img{height:42px;width:42px;border-radius:8px}
.nav-logo span{font-size:1.4rem;font-weight:800;color:var(--white);letter-spacing:1px}
.nav-logo .brand-dot{color:var(--orange)}
.nav-links{display:flex;gap:6px;list-style:none}
.nav-links a{padding:8px 14px;border-radius:6px;font-size:.9rem;color:var(--text);font-weight:500;transition:all .3s}
.nav-links a:hover,.nav-links a.active{background:var(--orange);color:var(--white)}
.mobile-toggle{display:none;background:none;border:none;color:var(--white);font-size:1.5rem;cursor:pointer}

/* 搜索框 */
.search-bar{background:var(--bg-card);padding:12px 0;border-bottom:1px solid var(--border)}
.search-wrap{display:flex;max-width:600px;margin:0 auto}
.search-wrap input{flex:1;padding:10px 18px;border:2px solid var(--border);border-right:none;border-radius:25px 0 0 25px;background:var(--bg-dark);color:var(--white);font-size:.95rem;outline:none;transition:border-color .3s}
.search-wrap input:focus{border-color:var(--orange)}
.search-wrap button{padding:10px 24px;background:linear-gradient(135deg,var(--orange),var(--purple));border:none;border-radius:0 25px 25px 0;color:var(--white);font-size:.95rem;cursor:pointer;font-weight:600;transition:opacity .3s}
.search-wrap button:hover{opacity:.85}

/* ========== Banner ========== */
.hero-banner{position:relative;height:520px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hero-banner img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:brightness(.55)}
.hero-content{position:relative;z-index:2;text-align:center;padding:0 20px}
.hero-content h1{font-size:2.8rem;font-weight:900;color:var(--white);text-shadow:0 4px 20px rgba(233,77,26,.5);margin-bottom:16px}
.hero-content h1 .hl{color:var(--orange)}
.hero-content p{font-size:1.15rem;color:var(--text);max-width:700px;margin:0 auto 24px;line-height:1.8}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.hero-tags span{background:rgba(233,77,26,.2);border:1px solid var(--orange);color:var(--orange-light);padding:5px 16px;border-radius:20px;font-size:.85rem}

/* ========== 通用区块 ========== */
.section{padding:60px 0}
.section-alt{background:var(--bg-card)}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:2rem;font-weight:800;color:var(--white);margin-bottom:8px}
.section-title h2 .hl{color:var(--orange)}
.section-title p{color:var(--text-light);font-size:1rem}
.section-title .breadcrumb{font-size:.85rem;color:var(--text-light);margin-bottom:10px}
.section-title .breadcrumb a{color:var(--orange)}

/* ========== 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(--bg-card);border-radius:12px;overflow:hidden;border:1px solid var(--border);transition:transform .3s,box-shadow .3s}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(233,77,26,.15)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;cursor:pointer}
.video-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb img{transform:scale(1.08)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(0);width:64px;height:64px;background:rgba(233,77,26,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:transform .3s;pointer-events:none}
.play-btn::after{content:'';width:0;height:0;border-style:solid;border-width:12px 0 12px 22px;border-color:transparent transparent transparent #fff;margin-left:4px}
.video-card:hover .play-btn{transform:translate(-50%,-50%) scale(1)}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.8);color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem}
.video-info{padding:14px 16px}
.video-info h3{font-size:1rem;font-weight:700;color:var(--white);margin-bottom:6px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:14px;font-size:.8rem;color:var(--text-light)}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tags{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.video-tags span{background:rgba(123,47,247,.15);color:var(--purple);padding:2px 10px;border-radius:12px;font-size:.72rem}

/* ========== 模块卡片 ========== */
.module-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}
.module-card{background:var(--bg-card2);border-radius:12px;padding:28px 22px;border:1px solid var(--border);transition:all .3s;text-align:center}
.module-card:hover{border-color:var(--orange);box-shadow:0 0 30px rgba(233,77,26,.1)}
.module-card .icon{font-size:2.5rem;margin-bottom:14px}
.module-card h3{font-size:1.1rem;font-weight:700;color:var(--white);margin-bottom:8px}
.module-card p{font-size:.88rem;color:var(--text-light);line-height:1.6}

/* ========== 专家展示 ========== */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.expert-card{background:var(--bg-card);border-radius:12px;overflow:hidden;border:1px solid var(--border);text-align:center;padding:24px;transition:all .3s}
.expert-card:hover{border-color:var(--purple);transform:translateY(-4px)}
.expert-card img{width:120px;height:120px;border-radius:50%;object-fit:cover;margin:0 auto 16px;border:3px solid var(--orange)}
.expert-card h3{font-size:1.1rem;color:var(--white);margin-bottom:4px}
.expert-card .role{color:var(--orange);font-size:.85rem;margin-bottom:10px}
.expert-card p{font-size:.85rem;color:var(--text-light);line-height:1.6;margin-bottom:14px}
.expert-card .btn-row{display:flex;gap:10px;justify-content:center}

/* ========== 按钮 ========== */
.btn{display:inline-block;padding:10px 22px;border-radius:8px;font-size:.9rem;font-weight:600;cursor:pointer;transition:all .3s;border:none;text-align:center}
.btn-primary{background:linear-gradient(135deg,var(--orange),#d4380d);color:#fff}
.btn-primary:hover{color:#fff;box-shadow:0 6px 20px rgba(233,77,26,.4);transform:translateY(-2px)}
.btn-outline{border:2px solid var(--purple);color:var(--purple);background:transparent}
.btn-outline:hover{background:var(--purple);color:#fff}
.btn-sm{padding:6px 16px;font-size:.82rem}

/* ========== FAQ ========== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:10px;margin-bottom:12px;overflow:hidden}
.faq-q{padding:16px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:var(--white);font-size:.95rem;transition:background .3s}
.faq-q:hover{background:rgba(233,77,26,.08)}
.faq-q::after{content:'+';font-size:1.4rem;color:var(--orange);transition:transform .3s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 20px}
.faq-item.open .faq-a{max-height:300px;padding:0 20px 16px}
.faq-a p{font-size:.9rem;color:var(--text-light);line-height:1.7}

/* ========== 用户评论 ========== */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.review-card{background:var(--bg-card);border-radius:12px;padding:22px;border:1px solid var(--border)}
.review-card .stars{color:var(--orange);font-size:1rem;margin-bottom:8px}
.review-card blockquote{font-size:.9rem;color:var(--text);line-height:1.7;margin-bottom:12px;font-style:italic}
.review-card .reviewer{display:flex;align-items:center;gap:10px}
.review-card .reviewer .avatar{width:36px;height:36px;border-radius:50%;background:var(--purple);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.85rem}
.review-card .reviewer .name{font-size:.85rem;color:var(--white)}
.review-card .reviewer .date{font-size:.75rem;color:var(--text-light)}

/* ========== 合作品牌墙 ========== */
.brand-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center}
.brand-wall .brand-item{background:var(--bg-card);border:1px solid var(--border);border-radius:10px;padding:18px 30px;font-size:1rem;font-weight:700;color:var(--text-light);transition:all .3s}
.brand-wall .brand-item:hover{border-color:var(--orange);color:var(--orange)}

/* ========== 联系方式 ========== */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.contact-card{background:var(--bg-card);border-radius:12px;padding:24px;border:1px solid var(--border);text-align:center}
.contact-card h3{font-size:1.1rem;color:var(--white);margin-bottom:14px}
.contact-card img{max-width:180px;margin:0 auto 14px;border-radius:8px}
.contact-card p{font-size:.88rem;color:var(--text-light);line-height:1.7}
.contact-info-list{list-style:none;text-align:left}
.contact-info-list li{padding:8px 0;border-bottom:1px solid var(--border);font-size:.9rem;color:var(--text)}
.contact-info-list li:last-child{border-bottom:none}
.contact-info-list strong{color:var(--orange)}

/* ========== 社交分享 ========== */
.share-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:20px;font-size:.85rem;font-weight:600;color:#fff;transition:all .3s}
.share-btn:hover{color:#fff;transform:translateY(-2px)}
.share-wechat{background:#07c160}.share-weibo{background:#e6162d}.share-douyin{background:#161823}.share-bilibili{background:#00a1d6}

/* ========== 页脚 ========== */
.site-footer{background:#0d1117;border-top:2px solid var(--orange);padding:40px 0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:30px;margin-bottom:30px}
.footer-col h4{font-size:1rem;font-weight:700;color:var(--white);margin-bottom:14px;padding-bottom:8px;border-bottom:2px solid var(--orange);display:inline-block}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:8px}
.footer-col a{color:var(--text-light);font-size:.88rem;transition:color .3s}
.footer-col a:hover{color:var(--orange)}
.footer-col p{font-size:.85rem;color:var(--text-light);line-height:1.7}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid var(--border);font-size:.82rem;color:var(--text-light)}
.footer-logo{display:flex;align-items:center;gap:8px;margin-bottom:14px}
.footer-logo img{height:36px;width:36px;border-radius:6px}
.footer-logo span{font-size:1.2rem;font-weight:800;color:var(--white)}

/* ========== 内页通用 ========== */
.page-header{background:var(--bg-card);padding:40px 0;border-bottom:1px solid var(--border)}
.page-header h1{font-size:2rem;font-weight:800;color:var(--white);margin-bottom:6px}
.page-header h1 .hl{color:var(--orange)}
.page-header p{color:var(--text-light);font-size:.95rem}
.content-section{padding:40px 0}
.text-block{max-width:800px;margin:0 auto;font-size:.95rem;color:var(--text);line-height:1.8}
.text-block h2,.text-block h3{color:var(--white);margin:24px 0 12px}
.text-block h2 .hl,.text-block h3 .hl{color:var(--orange)}

/* ========== 工具卡片 ========== */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}
.tool-card{background:linear-gradient(135deg,var(--bg-card),var(--bg-card2));border-radius:14px;padding:30px 20px;text-align:center;border:1px solid var(--border);transition:all .3s}
.tool-card:hover{border-color:var(--orange);transform:translateY(-4px)}
.tool-card .tool-icon{font-size:2.8rem;margin-bottom:12px}
.tool-card h3{color:var(--white);font-size:1.05rem;margin-bottom:8px}
.tool-card p{color:var(--text-light);font-size:.85rem;line-height:1.6}

/* ========== 响应式 ========== */
@media(max-width:768px){
  .nav-links{display:none;position:absolute;top:68px;left:0;right:0;background:var(--bg-card);flex-direction:column;padding:16px;border-bottom:2px solid var(--orange)}
  .nav-links.show{display:flex}
  .mobile-toggle{display:block}
  .hero-banner{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))}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
  .hero-banner{height:300px}
  .hero-content h1{font-size:1.4rem}
  .video-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .nav-inner{padding:0 12px}
}