/* ===== 小马拉大车 - 动物写真与视频社区 全站样式表 ===== */
/* 网站: 4h9uze.cn | 品牌: 小马拉大车 */

/* --- 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:#333;line-height:1.7;background:#f8f9fa}
a{color:#1a8c5e;text-decoration:none;transition:color .3s}
a:hover{color:#0d6b3f}
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:#222}

/* --- Layout Container --- */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:50px 0}
.section-title{text-align:center;margin-bottom:35px;font-size:28px;position:relative;padding-bottom:15px}
.section-title::after{content:"";display:block;width:60px;height:3px;background:linear-gradient(90deg,#1a8c5e,#34c78e);margin:12px auto 0;border-radius:2px}
.section-desc{text-align:center;color:#666;max-width:700px;margin:0 auto 30px;font-size:15px}

/* --- Header & Navigation --- */
.site-header{background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.08);position:sticky;top:0;z-index:1000}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 0;flex-wrap:wrap}
.site-logo{display:flex;align-items:center;gap:10px}
.site-logo img{height:45px;width:auto}
.site-logo span{font-size:22px;font-weight:800;color:#1a8c5e;letter-spacing:1px}
.main-nav{display:flex;align-items:center;gap:5px}
.main-nav a{padding:8px 14px;font-size:14px;color:#555;border-radius:6px;transition:all .3s;font-weight:500}
.main-nav a:hover,.main-nav a.active{background:#e8f5ee;color:#1a8c5e}
.nav-toggle{display:none;background:none;border:none;font-size:26px;cursor:pointer;color:#333;padding:5px}

/* --- Search Bar --- */
.search-bar{background:#f0f7f3;padding:12px 0;border-bottom:1px solid #e0e8e3}
.search-bar-inner{display:flex;align-items:center;justify-content:center;gap:10px}
.search-bar input{width:100%;max-width:500px;padding:10px 18px;border:2px solid #d0e0d6;border-radius:25px;font-size:14px;outline:none;transition:border-color .3s;background:#fff}
.search-bar input:focus{border-color:#1a8c5e}
.search-bar button{padding:10px 24px;background:linear-gradient(135deg,#1a8c5e,#34c78e);color:#fff;border:none;border-radius:25px;cursor:pointer;font-size:14px;font-weight:600;transition:transform .2s}
.search-bar button:hover{transform:scale(1.05)}

/* --- Banner / Hero --- */
.hero-banner{position:relative;height:500px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hero-banner img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,rgba(0,0,0,.55),rgba(26,140,94,.35))}
.hero-content{position:relative;z-index:2;text-align:center;color:#fff;padding:20px;max-width:800px}
.hero-content h1{font-size:42px;margin-bottom:15px;text-shadow:2px 2px 8px rgba(0,0,0,.4);letter-spacing:2px}
.hero-content p{font-size:18px;margin-bottom:25px;text-shadow:1px 1px 4px rgba(0,0,0,.3);line-height:1.8}
.hero-btn{display:inline-block;padding:14px 36px;background:linear-gradient(135deg,#1a8c5e,#34c78e);color:#fff;border-radius:30px;font-size:16px;font-weight:600;transition:all .3s;box-shadow:0 4px 15px rgba(26,140,94,.4)}
.hero-btn:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(26,140,94,.5);color:#fff}

/* --- Breadcrumb --- */
.breadcrumb{padding:12px 0;font-size:13px;color:#888}
.breadcrumb a{color:#1a8c5e}
.breadcrumb span{margin:0 6px;color:#ccc}

/* --- Video Card Grid --- */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:22px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 3px 15px rgba(0,0,0,.06);transition:all .3s;position:relative}
.video-card:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(0,0,0,.12)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#eee}
.video-thumb img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb img{transform:scale(1.05)}
.video-play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;background:rgba(26,140,94,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;cursor:pointer}
.video-card:hover .video-play-btn{opacity:1}
.video-play-btn::after{content:"";display:block;width:0;height:0;border-style:solid;border-width:12px 0 12px 22px;border-color:transparent transparent transparent #fff;margin-left:4px}
.video-info{padding:15px}
.video-info h3{font-size:15px;margin-bottom:8px;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;font-size:12px;color:#999}
.video-meta span{display:flex;align-items:center;gap:3px}
.video-tag{display:inline-block;padding:2px 8px;background:#e8f5ee;color:#1a8c5e;border-radius:3px;font-size:11px;margin-right:5px}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.7);color:#fff;padding:2px 8px;border-radius:3px;font-size:12px}
.video-poster{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;z-index:1;pointer-events:none}
.video-thumb .video-play-btn{z-index:3}
.video-thumb .video-duration{z-index:3}

/* --- Expert Cards --- */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:25px}
.expert-card{background:#fff;border-radius:12px;padding:25px;text-align:center;box-shadow:0 3px 15px rgba(0,0,0,.06);transition:all .3s}
.expert-card:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(0,0,0,.12)}
.expert-card img{width:120px;height:120px;border-radius:50%;object-fit:cover;margin:0 auto 15px;border:3px solid #e8f5ee}
.expert-card h4{font-size:18px;margin-bottom:5px}
.expert-card .role{color:#1a8c5e;font-size:13px;margin-bottom:10px}
.expert-card p{font-size:13px;color:#666;line-height:1.6;margin-bottom:12px}
.expert-card .btn-group{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.btn-sm{padding:6px 16px;border-radius:20px;font-size:12px;border:1px solid #1a8c5e;color:#1a8c5e;transition:all .3s;cursor:pointer;background:transparent}
.btn-sm:hover{background:#1a8c5e;color:#fff}
.btn-sm.primary{background:#1a8c5e;color:#fff}
.btn-sm.primary:hover{background:#0d6b3f}

/* --- FAQ Section --- */
.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,.04);overflow:hidden}
.faq-question{padding:18px 22px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-size:15px;transition:background .3s}
.faq-question:hover{background:#f8fdf9}
.faq-question::after{content:"+";font-size:22px;color:#1a8c5e;transition:transform .3s;font-weight:400}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 22px;max-height:0;overflow:hidden;transition:all .4s ease;font-size:14px;color:#666;line-height:1.8}
.faq-item.active .faq-answer{padding:0 22px 18px;max-height:500px}

/* --- Reviews --- */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.review-card{background:#fff;border-radius:12px;padding:22px;box-shadow:0 3px 12px rgba(0,0,0,.05)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.review-avatar{width:45px;height:45px;border-radius:50%;background:linear-gradient(135deg,#1a8c5e,#34c78e);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:18px}
.review-name{font-weight:600;font-size:14px}
.review-date{font-size:12px;color:#999}
.review-stars{color:#f5a623;font-size:14px;margin-bottom:8px;letter-spacing:2px}
.review-text{font-size:13px;color:#555;line-height:1.7}

/* --- Category Tabs --- */
.category-tabs{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:30px}
.category-tabs a{padding:8px 20px;border-radius:25px;background:#fff;color:#555;font-size:13px;border:1px solid #e0e0e0;transition:all .3s}
.category-tabs a:hover,.category-tabs a.active{background:#1a8c5e;color:#fff;border-color:#1a8c5e}

/* --- Share Buttons --- */
.share-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:15px 0}
.share-bar span{font-size:14px;color:#666;font-weight:600}
.share-btn{display:inline-flex;align-items:center;gap:5px;padding:6px 16px;border-radius:20px;font-size:12px;color:#fff;transition:all .3s;cursor:pointer}
.share-btn:hover{opacity:.85;color:#fff;transform:scale(1.05)}
.share-btn.wechat{background:#07c160}
.share-btn.weibo{background:#e6162d}
.share-btn.douyin{background:#111}
.share-btn.bilibili{background:#00a1d6}

/* --- AI Module --- */
.ai-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:22px}
.ai-card{background:linear-gradient(135deg,#f0faf5,#e8f5ee);border-radius:12px;padding:28px;transition:all .3s;border:1px solid #d0e8d6}
.ai-card:hover{transform:translateY(-3px);box-shadow:0 8px 20px rgba(26,140,94,.1)}
.ai-card h4{font-size:18px;color:#1a8c5e;margin-bottom:10px}
.ai-card p{font-size:14px;color:#555;line-height:1.7}
.ai-icon{font-size:36px;margin-bottom:12px}

/* --- Community Section --- */
.community-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}
.community-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 3px 12px rgba(0,0,0,.06);transition:all .3s}
.community-card:hover{transform:translateY(-4px);box-shadow:0 6px 20px rgba(0,0,0,.1)}
.community-card img{width:100%;height:160px;object-fit:cover}
.community-card .card-body{padding:15px}
.community-card h4{font-size:16px;margin-bottom:8px}
.community-card p{font-size:13px;color:#666;line-height:1.6}
.community-stats{display:flex;gap:15px;margin-top:10px;font-size:12px;color:#999}

/* --- Contact Section --- */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:25px}
.contact-card{background:#fff;border-radius:12px;padding:25px;box-shadow:0 3px 12px rgba(0,0,0,.05)}
.contact-card h4{font-size:18px;margin-bottom:15px;color:#1a8c5e}
.contact-item{display:flex;align-items:flex-start;gap:10px;margin-bottom:12px;font-size:14px;color:#555}
.contact-item strong{color:#333;min-width:70px}

/* --- How-To Guide --- */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px;counter-reset:step}
.howto-step{background:#fff;border-radius:12px;padding:25px;box-shadow:0 3px 12px rgba(0,0,0,.05);position:relative;counter-increment:step}
.howto-step::before{content:counter(step);position:absolute;top:-12px;left:20px;width:32px;height:32px;background:linear-gradient(135deg,#1a8c5e,#34c78e);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}
.howto-step h4{margin-top:8px;margin-bottom:8px;font-size:16px}
.howto-step p{font-size:13px;color:#666;line-height:1.7}

/* --- Partner Logos --- */
.partner-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center;padding:20px 0}
.partner-wall .partner-item{background:#fff;border-radius:10px;padding:15px 25px;box-shadow:0 2px 8px rgba(0,0,0,.05);font-size:15px;font-weight:600;color:#555;transition:all .3s}
.partner-wall .partner-item:hover{box-shadow:0 4px 15px rgba(0,0,0,.1);transform:translateY(-2px)}

/* --- Footer --- */
.site-footer{background:#1a2332;color:#ccc;padding:40px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:30px;margin-bottom:30px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:15px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:"";display:block;width:30px;height:2px;background:#1a8c5e;margin-top:8px}
.footer-col p,.footer-col a{font-size:13px;color:#aaa;line-height:2}
.footer-col a:hover{color:#34c78e}
.footer-col img{border-radius:8px;max-width:130px}
.footer-bottom{border-top:1px solid #2a3a4a;padding:18px 0;text-align:center;font-size:13px;color:#888}
.footer-bottom a{color:#1a8c5e}
.footer-logo{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.footer-logo img{height:35px}
.footer-logo span{font-size:18px;font-weight:700;color:#fff}

/* --- MCP Frontend Placeholder --- */
.mcp-widget{background:#f0f7f3;border:1px dashed #1a8c5e;border-radius:10px;padding:20px;text-align:center;margin:20px 0}
.mcp-widget p{color:#1a8c5e;font-size:14px}

/* --- Page Header (Inner Pages) --- */
.page-header{background:linear-gradient(135deg,#1a8c5e,#0d6b3f);color:#fff;padding:50px 0;text-align:center}
.page-header h1{font-size:32px;margin-bottom:10px;color:#fff}
.page-header p{font-size:16px;opacity:.9;max-width:600px;margin:0 auto}

/* --- Content Article --- */
.article-content{background:#fff;border-radius:12px;padding:35px;box-shadow:0 3px 15px rgba(0,0,0,.05);margin-bottom:25px}
.article-content h2{font-size:22px;margin:25px 0 12px;color:#1a8c5e;border-left:4px solid #1a8c5e;padding-left:12px}
.article-content h3{font-size:18px;margin:20px 0 10px;color:#333}
.article-content p{margin-bottom:15px;font-size:15px;line-height:1.8;color:#444}
.article-content ul,.article-content ol{margin:10px 0 15px 20px}
.article-content li{margin-bottom:8px;font-size:14px;color:#555}

/* --- Sidebar --- */
.page-layout{display:grid;grid-template-columns:1fr 300px;gap:30px}
.sidebar{position:sticky;top:80px;align-self:start}
.sidebar-widget{background:#fff;border-radius:12px;padding:20px;box-shadow:0 3px 12px rgba(0,0,0,.05);margin-bottom:20px}
.sidebar-widget h4{font-size:16px;margin-bottom:12px;padding-bottom:8px;border-bottom:2px solid #e8f5ee}
.sidebar-widget a{display:block;padding:6px 0;font-size:13px;color:#555;border-bottom:1px solid #f5f5f5}
.sidebar-widget a:hover{color:#1a8c5e}

/* --- Tags --- */
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.tag-cloud a{padding:4px 12px;background:#f0f7f3;color:#1a8c5e;border-radius:15px;font-size:12px;transition:all .3s}
.tag-cloud a:hover{background:#1a8c5e;color:#fff}

/* --- Responsive --- */
@media(max-width:992px){
  .page-layout{grid-template-columns:1fr}
  .sidebar{position:static}
  .hero-banner{height:380px}
  .hero-content h1{font-size:30px}
}
@media(max-width:768px){
  .main-nav{display:none;flex-direction:column;width:100%;background:#fff;position:absolute;top:100%;left:0;padding:10px;box-shadow:0 5px 15px rgba(0,0,0,.1);border-radius:0 0 12px 12px}
  .main-nav.show{display:flex}
  .nav-toggle{display:block}
  .header-inner{position:relative}
  .hero-banner{height:300px}
  .hero-content h1{font-size:24px}
  .hero-content p{font-size:14px}
  .section-title{font-size:22px}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .hero-banner{height:250px}
  .hero-content h1{font-size:20px}
}

/* --- Lazy Load Placeholder --- */
img[data-src]{background:#f0f0f0;min-height:100px}

/* --- Animation --- */
@keyframes fadeInUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.fade-in{animation:fadeInUp .6s ease forwards;opacity:0}

/* --- Utility --- */
.text-center{text-align:center}
.text-green{color:#1a8c5e}
.bg-light{background:#f8fdf9}
.bg-white{background:#fff}
.mt-20{margin-top:20px}
.mb-20{margin-bottom:20px}
.pt-20{padding-top:20px}
.pb-20{padding-bottom:20px}