/* ========================================
   小马拉大车 - 植物视频社区 全站样式表
   品牌：小马拉大车 | 域名：ta697307.cn
   百度SEO EEAT优化版
   ======================================== */

/* Reset & Base */
*,*::before,*::after{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:#333;background:#0a0f0d;line-height:1.8;overflow-x:hidden}
a{color:#2ecc71;text-decoration:none;transition:color .3s}
a:hover{color:#27ae60}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;color:#e8f5e9;line-height:1.4}

/* Container */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section-wrap{padding:60px 0}

/* Header */
.site-header{background:linear-gradient(135deg,#0d1f12 0%,#1a3a20 100%);position:sticky;top:0;z-index:1000;box-shadow:0 2px 20px rgba(0,0,0,.5);border-bottom:1px solid rgba(46,204,113,.2)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;max-width:1200px;margin:0 auto}
.site-logo{display:flex;align-items:center;gap:10px}
.site-logo img{height:48px;width:auto}
.site-logo h1{font-size:1.5rem;color:#2ecc71;margin:0;white-space:nowrap}
.site-logo h1 span{color:#fff;font-size:.75rem;display:block;font-weight:400}

/* Navigation */
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{color:#c8e6c9;padding:10px 14px;font-size:.85rem;transition:all .3s;position:relative;white-space:nowrap}
.main-nav a:hover,.main-nav a.active{color:#2ecc71;background:rgba(46,204,113,.1);border-radius:4px}
.mobile-menu-btn{display:none;background:none;border:none;color:#2ecc71;font-size:1.5rem;cursor:pointer;padding:8px}

/* Search Bar */
.search-bar-wrap{background:rgba(13,31,18,.9);padding:10px 0;border-bottom:1px solid rgba(46,204,113,.1)}
.search-bar{display:flex;max-width:600px;margin:0 auto;gap:0}
.search-bar input{flex:1;padding:10px 16px;border:1px solid rgba(46,204,113,.3);border-right:none;border-radius:4px 0 0 4px;background:rgba(255,255,255,.05);color:#e8f5e9;font-size:.9rem;outline:none;transition:border-color .3s}
.search-bar input:focus{border-color:#2ecc71}
.search-bar input::placeholder{color:#666}
.search-bar button{padding:10px 24px;background:#2ecc71;color:#fff;border:none;border-radius:0 4px 4px 0;cursor:pointer;font-size:.9rem;transition:background .3s}
.search-bar button:hover{background:#27ae60}

/* Breadcrumb */
.breadcrumb{padding:12px 0;font-size:.85rem;color:#888}
.breadcrumb a{color:#2ecc71}
.breadcrumb span{margin:0 6px;color:#555}

/* Banner / Hero */
.hero-banner{position:relative;height:70vh;min-height:480px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hero-banner .hero-bg{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;filter:brightness(.5)}
.hero-content{position:relative;z-index:2;text-align:center;padding:40px 20px;max-width:800px}
.hero-content h1{font-size:2.8rem;color:#fff;margin-bottom:16px;text-shadow:0 2px 20px rgba(0,0,0,.8)}
.hero-content h2{font-size:1.5rem;color:#2ecc71;margin-bottom:12px;font-weight:400}
.hero-content p{color:#c8e6c9;font-size:1.1rem;margin-bottom:24px;line-height:1.8}
.hero-content .hero-tags{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.hero-content .hero-tags span{background:rgba(46,204,113,.15);color:#2ecc71;padding:4px 14px;border-radius:20px;font-size:.8rem;border:1px solid rgba(46,204,113,.3)}

/* Section Titles */
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:2rem;color:#e8f5e9;margin-bottom:8px;position:relative;display:inline-block}
.section-title h2::after{content:'';display:block;width:60px;height:3px;background:#2ecc71;margin:12px auto 0}
.section-title p{color:#888;font-size:.95rem;margin-top:8px}

/* Video Card Grid */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.video-card{background:#111;border-radius:8px;overflow:hidden;transition:transform .3s,box-shadow .3s;cursor:pointer;position:relative}
.video-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(46,204,113,.15)}
.video-card .thumb-wrap{position:relative;padding-top:56.25%;overflow:hidden}
.video-card .thumb-wrap img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .thumb-wrap img{transform:scale(1.05)}
.video-card .play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(0);width:56px;height:56px;background:rgba(46,204,113,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:transform .3s;z-index:3}
.video-card:hover .play-btn{transform:translate(-50%,-50%) scale(1)}
.play-btn::after{content:'';display:block;width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:3px}
.video-card .duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.8);color:#fff;padding:2px 8px;border-radius:3px;font-size:.75rem;z-index:3}
.video-card .card-info{padding:12px}
.video-card .card-info h3{font-size:.9rem;color:#e8f5e9;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-card .card-info .meta{display:flex;align-items:center;gap:12px;font-size:.75rem;color:#888}
.video-card .card-info .meta .views::before{content:'▶ '}
.video-card .card-info .meta .likes::before{content:'♥ '}
.video-card .card-info .tag{display:inline-block;background:rgba(46,204,113,.1);color:#2ecc71;padding:2px 8px;border-radius:3px;font-size:.7rem;margin-top:6px}
.video-card .card-info .card-author{font-size:.7rem;color:#666;margin:4px 0;line-height:1.4}

/* Feature Modules */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:linear-gradient(145deg,#111 0%,#0a1a0f 100%);border:1px solid rgba(46,204,113,.15);border-radius:10px;padding:30px;text-align:center;transition:all .3s}
.feature-card:hover{border-color:#2ecc71;transform:translateY(-3px);box-shadow:0 6px 25px rgba(46,204,113,.1)}
.feature-card .icon{font-size:2.5rem;margin-bottom:16px}
.feature-card h3{color:#e8f5e9;font-size:1.1rem;margin-bottom:10px}
.feature-card p{color:#888;font-size:.85rem;line-height:1.7}

/* Expert Section */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:#111;border-radius:10px;overflow:hidden;text-align:center;transition:transform .3s;border:1px solid rgba(46,204,113,.1)}
.expert-card:hover{transform:translateY(-4px);border-color:#2ecc71}
.expert-card .avatar{width:120px;height:120px;border-radius:50%;margin:24px auto 16px;overflow:hidden;border:3px solid #2ecc71}
.expert-card .avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h4{color:#e8f5e9;font-size:1rem;margin-bottom:4px}
.expert-card .role{color:#2ecc71;font-size:.8rem;margin-bottom:8px}
.expert-card p{color:#888;font-size:.8rem;padding:0 16px;line-height:1.6}
.expert-card .expert-links{display:flex;justify-content:center;gap:10px;padding:16px}
.expert-card .expert-links a{padding:6px 14px;border:1px solid #2ecc71;color:#2ecc71;border-radius:4px;font-size:.75rem;transition:all .3s}
.expert-card .expert-links a:hover{background:#2ecc71;color:#fff}

/* Expert Certification Tags */
.cert-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;padding:0 12px;margin-bottom:10px}
.cert-tag{display:inline-block;background:rgba(46,204,113,.1);color:#2ecc71;padding:2px 10px;border-radius:12px;font-size:.65rem;border:1px solid rgba(46,204,113,.25)}

/* FAQ Section */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid rgba(46,204,113,.15);border-radius:8px;margin-bottom:12px;overflow:hidden;background:#111}
.faq-item .faq-q{padding:16px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:#e8f5e9;font-weight:600;font-size:.95rem;transition:background .3s}
.faq-item .faq-q:hover{background:rgba(46,204,113,.05)}
.faq-item .faq-q .arrow{transition:transform .3s;color:#2ecc71}
.faq-item.active .faq-q .arrow{transform:rotate(180deg)}
.faq-item .faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease;color:#aaa;font-size:.9rem;line-height:1.8}
.faq-item.active .faq-a{max-height:300px;padding:0 20px 16px}

/* Reviews */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.review-card{background:#111;border:1px solid rgba(46,204,113,.1);border-radius:10px;padding:24px;position:relative}
.review-card .stars{color:#f1c40f;font-size:1rem;margin-bottom:8px}
.review-card blockquote{color:#c8e6c9;font-size:.9rem;line-height:1.8;margin-bottom:12px;font-style:italic}
.review-card .reviewer{display:flex;align-items:center;gap:10px}
.review-card .reviewer .name{color:#e8f5e9;font-weight:600;font-size:.85rem}
.review-card .reviewer .date{color:#666;font-size:.75rem}

/* Partners Logo Wall */
.partner-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-grid .partner-item{background:rgba(255,255,255,.05);padding:16px 24px;border-radius:8px;border:1px solid rgba(46,204,113,.1);color:#888;font-size:.9rem;transition:all .3s}
.partner-grid .partner-item:hover{border-color:#2ecc71;color:#2ecc71}

/* Contact Section */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.contact-info{background:#111;border-radius:10px;padding:30px;border:1px solid rgba(46,204,113,.1)}
.contact-info h3{color:#e8f5e9;margin-bottom:16px;font-size:1.1rem}
.contact-info .info-item{display:flex;align-items:flex-start;gap:12px;margin-bottom:14px;color:#aaa;font-size:.9rem}
.contact-info .info-item .label{color:#2ecc71;min-width:80px;font-weight:600}

/* QR Code Section */
.qr-grid{display:flex;justify-content:center;gap:40px;flex-wrap:wrap}
.qr-item{text-align:center}
.qr-item img{width:160px;height:160px;border-radius:8px;margin-bottom:8px}
.qr-item p{color:#888;font-size:.85rem}

/* Share Buttons */
.share-bar{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;padding:20px 0}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:20px;font-size:.8rem;color:#fff;transition:all .3s;border:none;cursor:pointer}
.share-btn.wechat{background:#07c160}
.share-btn.weibo{background:#e6162d}
.share-btn.douyin{background:#161823}
.share-btn.bilibili{background:#00a1d6}
.share-btn:hover{opacity:.85;transform:translateY(-2px)}

/* Footer */
.site-footer{background:linear-gradient(135deg,#0a1a0f 0%,#0d1f12 100%);border-top:1px solid rgba(46,204,113,.2);padding:40px 0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-bottom:30px}
.footer-col h4{color:#e8f5e9;font-size:1rem;margin-bottom:16px;position:relative;padding-bottom:8px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:#2ecc71}
.footer-col a{display:block;color:#888;font-size:.85rem;padding:4px 0;transition:color .3s}
.footer-col a:hover{color:#2ecc71;padding-left:4px}
.footer-col p{color:#888;font-size:.85rem;line-height:1.7}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(46,204,113,.1);color:#666;font-size:.8rem}
.footer-bottom .update-time{color:#888;margin-top:6px}
.footer-bottom a{font-size:.8rem}

/* How-To Guide */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:30px}
.howto-step{background:#111;border-radius:10px;padding:24px;text-align:center;border:1px solid rgba(46,204,113,.1);position:relative}
.howto-step .step-num{width:40px;height:40px;background:#2ecc71;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;margin:0 auto 16px;font-size:1.1rem}
.howto-step h4{color:#e8f5e9;margin-bottom:8px;font-size:.95rem}
.howto-step p{color:#888;font-size:.8rem;line-height:1.6}

/* Category Tabs */
.cat-tabs{display:flex;justify-content:center;gap:8px;margin-bottom:30px;flex-wrap:wrap}
.cat-tabs .tab{padding:8px 20px;border:1px solid rgba(46,204,113,.3);border-radius:20px;color:#888;font-size:.85rem;cursor:pointer;transition:all .3s}
.cat-tabs .tab:hover,.cat-tabs .tab.active{background:#2ecc71;color:#fff;border-color:#2ecc71}

/* Stats Bar */
.stats-bar{display:flex;justify-content:center;gap:40px;padding:30px 0;background:rgba(46,204,113,.05);border-radius:10px;margin:30px 0}
.stat-item{text-align:center}
.stat-item .num{font-size:2rem;color:#2ecc71;font-weight:700}
.stat-item .label{color:#888;font-size:.85rem;margin-top:4px}

/* Inner Page Content */
.page-content{background:#111;border-radius:10px;padding:40px;margin:30px 0;border:1px solid rgba(46,204,113,.1)}
.page-content h2{color:#e8f5e9;font-size:1.5rem;margin-bottom:16px}
.page-content h3{color:#c8e6c9;font-size:1.2rem;margin:20px 0 10px}
.page-content p{color:#aaa;line-height:1.9;margin-bottom:14px}
.page-content ul{margin:10px 0 20px 20px}
.page-content ul li{color:#aaa;padding:4px 0;font-size:.9rem}
.page-content ul li::before{content:'✦ ';color:#2ecc71}

/* MCP Frontend Block */
.mcp-block{background:rgba(46,204,113,.03);border:1px dashed rgba(46,204,113,.2);border-radius:8px;padding:20px;margin:20px 0;text-align:center;color:#666;font-size:.85rem}

/* Lazy Load Placeholder */
.lazy-img{opacity:0;transition:opacity .6s ease-in}
.lazy-img.loaded{opacity:1}
.lazy-img[src]{opacity:0}
.lazy-img.loaded[src]{opacity:1}
/* Fallback: if no JS, show images */
noscript img,.no-js .lazy-img{opacity:1}

/* EEAT Bar */
.eeat-bar{background:rgba(46,204,113,.03);border-radius:10px;padding:20px;margin:20px 0}

/* Trust Signals */
.trust-signals span{display:inline-block;margin:4px 10px}

/* Footer Logo */
.footer-logo{display:flex;align-items:center;margin-bottom:8px}
.footer-logo img{display:inline-block;vertical-align:middle}

/* Responsive */
@media(max-width:1024px){
.video-grid{grid-template-columns:repeat(3,1fr)}
.feature-grid{grid-template-columns:repeat(2,1fr)}
.expert-grid{grid-template-columns:repeat(2,1fr)}
.footer-grid{grid-template-columns:repeat(2,1fr)}
.howto-steps{grid-template-columns:repeat(2,1fr)}
.main-nav a{padding:10px 10px;font-size:.8rem}
}
@media(max-width:768px){
.header-inner{flex-wrap:wrap}
.main-nav{display:none;width:100%;flex-direction:column;padding:10px 0}
.main-nav.show{display:flex}
.mobile-menu-btn{display:block}
.hero-banner{height:50vh;min-height:360px}
.hero-content h1{font-size:1.8rem}
.hero-content h2{font-size:1.1rem}
.video-grid{grid-template-columns:repeat(2,1fr)}
.feature-grid{grid-template-columns:1fr}
.expert-grid{grid-template-columns:1fr}
.review-grid{grid-template-columns:1fr}
.contact-grid{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr}
.howto-steps{grid-template-columns:1fr}
.stats-bar{flex-direction:column;gap:20px}
.section-wrap{padding:40px 0}
.eeat-bar{flex-direction:column;gap:15px}
}
@media(max-width:480px){
.video-grid{grid-template-columns:1fr}
.hero-content h1{font-size:1.4rem}
.search-bar input{font-size:.8rem}
}

/* Interference tags - hidden but present */
.itf-wrap{position:absolute;width:0;height:0;overflow:hidden;opacity:0;pointer-events:none;z-index:-9999}