/* 免费看片 - 汽车改装视频社区 全站样式 */
/* soutm27.cn */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:#222;background:#f8f9fa;line-height:1.7}
a{color:#1a3a5c;text-decoration:none;transition:color .3s}
a:hover{color:#ff6b35}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 15px}
.clearfix::after{content:"";display:table;clear:both}

/* 头部导航 */
.site-header{background:#1a3a5c;position:sticky;top:0;z-index:1000;box-shadow:0 2px 10px rgba(0,0,0,.15)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:8px 15px;max-width:1200px;margin:0 auto}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{height:50px;width:auto}
.logo-wrap .brand-text{color:#fff;font-size:20px;font-weight:700;letter-spacing:1px}
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{color:#e0e8f0;padding:12px 16px;font-size:14px;font-weight:500;transition:all .3s;border-bottom:3px solid transparent}
.main-nav a:hover,.main-nav a.active{color:#ff6b35;border-bottom-color:#ff6b35;background:rgba(255,255,255,.05)}
.nav-toggle{display:none;color:#fff;font-size:28px;cursor:pointer;background:none;border:none;padding:5px}

/* 搜索框 */
.search-bar{background:#15304d;padding:10px 0}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;max-width:600px;width:100%;border-radius:25px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.2)}
.search-box input{flex:1;padding:10px 20px;border:none;font-size:14px;outline:none;background:#fff}
.search-box button{padding:10px 25px;background:#ff6b35;color:#fff;border:none;font-size:14px;cursor:pointer;font-weight:600;transition:background .3s}
.search-box button:hover{background:#e55a28}

/* Hero区域 */
.hero-section{position:relative;overflow:hidden;height:500px;background:#111}
.hero-slider{display:flex;transition:transform .6s ease;height:100%}
.hero-slide{min-width:100%;height:100%;position:relative}
.hero-slide img{width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(to bottom,rgba(0,0,0,.3),rgba(0,0,0,.7));display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:20px}
.hero-overlay h1{color:#fff;font-size:42px;margin-bottom:15px;text-shadow:2px 2px 8px rgba(0,0,0,.5)}
.hero-overlay p{color:#ddd;font-size:18px;max-width:700px;margin-bottom:25px}
.hero-btn{display:inline-block;padding:12px 35px;background:#ff6b35;color:#fff;border-radius:30px;font-size:16px;font-weight:600;transition:all .3s;box-shadow:0 4px 15px rgba(255,107,53,.4)}
.hero-btn:hover{background:#e55a28;transform:translateY(-2px);color:#fff}
.hero-dots{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:10}
.hero-dots span{width:12px;height:12px;border-radius:50%;background:rgba(255,255,255,.5);cursor:pointer;transition:background .3s}
.hero-dots span.active{background:#ff6b35}

/* 通用区块 */
.section{padding:50px 0}
.section-alt{background:#fff}
.section-dark{background:#1a3a5c;color:#fff}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:30px;color:#1a3a5c;margin-bottom:10px;position:relative;display:inline-block}
.section-title h2::after{content:"";display:block;width:60px;height:3px;background:#ff6b35;margin:10px auto 0}
.section-dark .section-title h2{color:#fff}
.section-title p{color:#666;font-size:15px;margin-top:8px}
.section-dark .section-title p{color:#b0c4de}

/* 视频卡片 */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.video-card{background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 3px 15px rgba(0,0,0,.08);transition:all .3s;position:relative}
.video-card:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(0,0,0,.15)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#000}
.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(1.05)}
.play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;background:rgba(0,0,0,.3)}
.video-card:hover .play-btn{opacity:1}
.play-btn span{width:60px;height:60px;background:rgba(255,107,53,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0}
.play-btn span::after{content:"";border-style:solid;border-width:12px 0 12px 22px;border-color:transparent transparent transparent #fff;margin-left:4px}
.video-info{padding:12px 15px}
.video-info h3{font-size:15px;color:#222;margin-bottom:6px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.video-info .meta{display:flex;justify-content:space-between;font-size:12px;color:#999}
.video-info .meta .views{color:#ff6b35}
.video-tag{position:absolute;top:10px;left:10px;background:#ff6b35;color:#fff;padding:3px 10px;border-radius:12px;font-size:11px;font-weight:600;z-index:5}
.video-duration{position:absolute;bottom:10px;right:10px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:11px;z-index:5}

/* 分类标签栏 */
.tab-nav{display:flex;justify-content:center;gap:10px;margin-bottom:30px;flex-wrap:wrap}
.tab-nav a{padding:8px 22px;border-radius:20px;background:#e8ecf0;color:#555;font-size:14px;transition:all .3s}
.tab-nav a:hover,.tab-nav a.active{background:#ff6b35;color:#fff}

/* 专家团队 */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:25px}
.expert-card{background:#fff;border-radius:12px;padding:25px 20px;text-align:center;box-shadow:0 3px 15px rgba(0,0,0,.08);transition:all .3s}
.expert-card:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(0,0,0,.15)}
.expert-avatar{width:90px;height:90px;border-radius:50%;margin:0 auto 15px;background:#e8ecf0;overflow:hidden;border:3px solid #ff6b35}
.expert-avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h4{font-size:17px;color:#1a3a5c;margin-bottom:5px}
.expert-card .role{color:#ff6b35;font-size:13px;margin-bottom:10px}
.expert-card p{font-size:13px;color:#666;margin-bottom:15px;line-height:1.6}
.expert-card .btn-sm{display:inline-block;padding:6px 18px;border-radius:20px;font-size:12px;border:1px solid #ff6b35;color:#ff6b35;transition:all .3s;margin:0 3px}
.expert-card .btn-sm:hover{background:#ff6b35;color:#fff}

/* 合作品牌 */
.brand-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.brand-wall .brand-item{width:120px;height:60px;background:#f0f2f5;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;color:#555;transition:all .3s;border:1px solid #e0e0e0}
.brand-wall .brand-item:hover{border-color:#ff6b35;color:#ff6b35;box-shadow:0 3px 10px rgba(255,107,53,.15)}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:10px;margin-bottom:12px;box-shadow:0 2px 8px rgba(0,0,0,.05);overflow:hidden}
.faq-q{padding:18px 20px;font-size:15px;font-weight:600;color:#1a3a5c;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .3s}
.faq-q:hover{background:#f8f9fa}
.faq-q::after{content:"+";font-size:22px;color:#ff6b35;transition:transform .3s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:all .4s;color:#555;font-size:14px;line-height:1.8}
.faq-item.open .faq-a{padding:0 20px 18px;max-height:500px}

/* 用户评论 */
.review-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.review-card{background:#fff;border-radius:10px;padding:20px;box-shadow:0 3px 12px rgba(0,0,0,.06);position:relative}
.review-card::before{content:"\201C";font-size:60px;color:#ff6b35;opacity:.2;position:absolute;top:5px;left:15px;font-family:Georgia,serif}
.review-stars{color:#ffb800;font-size:14px;margin-bottom:8px}
.review-card p{font-size:14px;color:#555;line-height:1.7;margin-bottom:12px;padding-top:10px}
.review-user{display:flex;align-items:center;gap:10px}
.review-user .avatar{width:36px;height:36px;border-radius:50%;background:#e8ecf0}
.review-user .name{font-size:13px;font-weight:600;color:#1a3a5c}
.review-user .date{font-size:11px;color:#999}

/* How-To指南 */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.howto-step{text-align:center;padding:25px 15px;background:#fff;border-radius:10px;box-shadow:0 3px 12px rgba(0,0,0,.06)}
.howto-step .step-num{width:50px;height:50px;border-radius:50%;background:#ff6b35;color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:700;margin:0 auto 15px}
.howto-step h4{font-size:16px;color:#1a3a5c;margin-bottom:8px}
.howto-step p{font-size:13px;color:#666}

/* 联系我们 */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}
.contact-card{background:#fff;border-radius:10px;padding:25px;box-shadow:0 3px 12px rgba(0,0,0,.06);text-align:center}
.contact-card h4{font-size:17px;color:#1a3a5c;margin-bottom:12px}
.contact-card p{font-size:14px;color:#555;line-height:1.8}
.contact-card .icon{font-size:36px;margin-bottom:10px;color:#ff6b35}

/* AI赋能 */
.ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}
.ai-card{background:linear-gradient(135deg,#1a3a5c,#2a5a8c);border-radius:12px;padding:30px 20px;color:#fff;text-align:center;transition:all .3s}
.ai-card:hover{transform:translateY(-5px);box-shadow:0 10px 30px rgba(26,58,92,.3)}
.ai-card .ai-icon{font-size:40px;margin-bottom:15px}
.ai-card h4{font-size:17px;margin-bottom:10px}
.ai-card p{font-size:13px;color:#b0c4de;line-height:1.7}

/* 社区模块 */
.community-cats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.community-cat{position:relative;border-radius:12px;overflow:hidden;height:200px}
.community-cat img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.community-cat:hover img{transform:scale(1.08)}
.community-cat .cat-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.7),transparent);display:flex;flex-direction:column;justify-content:flex-end;padding:20px}
.community-cat h4{color:#fff;font-size:18px;margin-bottom:5px}
.community-cat p{color:#ccc;font-size:13px}

/* 社交分享 */
.share-bar{display:flex;justify-content:center;gap:15px;padding:20px 0}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:20px;font-size:13px;color:#fff;transition:all .3s}
.share-btn:hover{transform:translateY(-2px);color:#fff}
.share-wechat{background:#07c160}
.share-weibo{background:#e6162d}
.share-douyin{background:#111}
.share-bilibili{background:#00a1d6}

/* 页脚 */
.site-footer{background:#111;color:#aaa;padding:40px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;padding-bottom:30px;border-bottom:1px solid #333}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:15px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:"";position:absolute;bottom:0;left:0;width:30px;height:2px;background:#ff6b35}
.footer-col p,.footer-col a{font-size:13px;color:#888;line-height:2}
.footer-col a:hover{color:#ff6b35}
.footer-col .qr-img{width:120px;height:120px;border-radius:8px;margin-top:5px}
.footer-bottom{text-align:center;padding:20px 0;font-size:13px;color:#666}
.footer-bottom a{color:#888}

/* 面包屑 */
.breadcrumb{padding:12px 0;font-size:13px;color:#888}
.breadcrumb a{color:#1a3a5c}
.breadcrumb span{margin:0 6px;color:#ccc}

/* 内页通用 */
.page-banner{height:280px;position:relative;overflow:hidden;background:#1a3a5c}
.page-banner img{width:100%;height:100%;object-fit:cover;opacity:.5}
.page-banner .banner-text{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;align-items:center;color:#fff}
.page-banner h1{font-size:36px;margin-bottom:10px}
.page-banner p{font-size:16px;color:#ddd}

/* 更多按钮 */
.more-wrap{text-align:center;margin-top:30px}
.more-btn{display:inline-block;padding:10px 30px;border:2px solid #ff6b35;color:#ff6b35;border-radius:25px;font-size:14px;transition:all .3s}
.more-btn:hover{background:#ff6b35;color:#fff}

/* MCP模块 */
.mcp-section{background:#f0f2f5;padding:30px 0}
.mcp-box{max-width:600px;margin:0 auto;background:#fff;border-radius:12px;padding:25px;box-shadow:0 3px 12px rgba(0,0,0,.06);text-align:center}
.mcp-box h4{font-size:17px;color:#1a3a5c;margin-bottom:10px}
.mcp-box .mcp-input{width:100%;padding:10px 15px;border:1px solid #ddd;border-radius:8px;font-size:14px;margin-bottom:10px}
.mcp-box .mcp-btn{padding:10px 30px;background:#1a3a5c;color:#fff;border:none;border-radius:8px;cursor:pointer;font-size:14px;transition:background .3s}
.mcp-box .mcp-btn:hover{background:#ff6b35}

/* 响应式 */
@media(max-width:992px){
.video-grid{grid-template-columns:repeat(2,1fr)}
.expert-grid{grid-template-columns:repeat(2,1fr)}
.review-grid{grid-template-columns:repeat(2,1fr)}
.howto-steps{grid-template-columns:repeat(2,1fr)}
.ai-grid{grid-template-columns:repeat(2,1fr)}
.contact-grid{grid-template-columns:1fr 1fr}
.footer-grid{grid-template-columns:repeat(2,1fr)}
.hero-overlay h1{font-size:32px}
}
@media(max-width:768px){
.main-nav{display:none;position:absolute;top:66px;left:0;right:0;background:#1a3a5c;flex-direction:column;padding:10px 0;box-shadow:0 5px 15px rgba(0,0,0,.2)}
.main-nav.show{display:flex}
.main-nav a{padding:12px 20px;border-bottom:none}
.nav-toggle{display:block}
.video-grid{grid-template-columns:1fr 1fr}
.expert-grid{grid-template-columns:1fr}
.review-grid{grid-template-columns:1fr}
.howto-steps{grid-template-columns:1fr 1fr}
.ai-grid{grid-template-columns:1fr}
.community-cats{grid-template-columns:1fr}
.contact-grid{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr}
.hero-section{height:350px}
.hero-overlay h1{font-size:26px}
.hero-overlay p{font-size:15px}
.section-title h2{font-size:24px}
}
@media(max-width:480px){
.video-grid{grid-template-columns:1fr}
.howto-steps{grid-template-columns:1fr}
.header-inner{padding:8px 10px}
.logo-wrap .brand-text{font-size:16px}
}

/* 懒加载占位 */
img[data-src]{background:#e8ecf0;min-height:100px}

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