/* ============================================
   国产 - 植物视频社区平台
   配色：森林绿 #1a5c2e + 翡翠绿 #2d8a4e + 金叶色 #c8a832
   域名：31855.cn
   ============================================ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'Microsoft YaHei','PingFang SC','Hiragino Sans GB',sans-serif;color:#333;background:#f7f5f0;line-height:1.8}
a{color:#1a5c2e;text-decoration:none;transition:color .3s}
a:hover{color:#c8a832}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{background:#0e3a1a;padding:12px 0;position:sticky;top:0;z-index:1000;box-shadow:0 2px 12px rgba(0,0,0,.3)}
.header-inner{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto;padding:0 20px}
.site-logo{display:flex;align-items:center;gap:10px}
.site-logo img{height:50px;width:auto}
.site-logo span{color:#fff;font-size:22px;font-weight:700;letter-spacing:1px}
.main-nav{display:flex;gap:6px}
.main-nav a{color:#e0e0e0;padding:8px 16px;border-radius:6px;font-size:15px;transition:all .3s}
.main-nav a:hover,.main-nav a.active{background:#1a5c2e;color:#fff}
.mobile-menu-btn{display:none;background:none;border:none;color:#fff;font-size:28px;cursor:pointer}

/* Search Box */
.search-section{background:#1a5c2e;padding:14px 0}
.search-box{max-width:600px;margin:0 auto;display:flex;gap:8px}
.search-box input{flex:1;padding:10px 18px;border:2px solid #2d8a4e;border-radius:25px;font-size:15px;outline:none;background:#fff}
.search-box input:focus{border-color:#c8a832}
.search-box button{padding:10px 28px;background:#c8a832;color:#fff;border:none;border-radius:25px;font-size:15px;cursor:pointer;font-weight:600;transition:background .3s}
.search-box button:hover{background:#b89628}

/* Banner */
.banner{position:relative;height:520px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.banner-bg{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;filter:brightness(.55)}
.banner-content{position:relative;z-index:2;text-align:center;color:#fff;padding:0 20px}
.banner-content h1{font-size:42px;margin-bottom:16px;text-shadow:2px 2px 8px rgba(0,0,0,.5);letter-spacing:3px}
.banner-content h2{font-size:20px;font-weight:400;margin-bottom:24px;text-shadow:1px 1px 4px rgba(0,0,0,.4);opacity:.95}
.banner-content p{font-size:16px;max-width:700px;margin:0 auto 20px;text-shadow:1px 1px 3px rgba(0,0,0,.3);line-height:1.9}
.btn-primary{display:inline-block;padding:14px 36px;background:#c8a832;color:#fff;border-radius:30px;font-size:16px;font-weight:600;transition:all .3s;border:2px solid #c8a832}
.btn-primary:hover{background:transparent;color:#c8a832}
.btn-secondary{display:inline-block;padding:12px 30px;background:transparent;color:#fff;border:2px solid #fff;border-radius:30px;font-size:15px;transition:all .3s;margin-left:12px}
.btn-secondary:hover{background:#fff;color:#1a5c2e}

/* Breadcrumb */
.breadcrumb{padding:12px 0;font-size:13px;color:#888}
.breadcrumb a{color:#1a5c2e}
.breadcrumb span{margin:0 6px;color:#ccc}

/* Section Common */
.section{padding:60px 0}
.section-alt{background:#eef5e9}
.section-dark{background:#0e3a1a;color:#fff}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:32px;color:#1a5c2e;margin-bottom:10px;position:relative;display:inline-block}
.section-title h2::after{content:'';display:block;width:60px;height:3px;background:#c8a832;margin:10px auto 0}
.section-dark .section-title h2{color:#fff}
.section-title p{color:#777;font-size:15px;margin-top:8px}

/* Video Cards */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s}
.video-card:hover{transform:translateY(-6px);box-shadow:0 8px 30px rgba(0,0,0,.15)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;cursor:pointer}
.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(1.08)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:56px;height:56px;background:rgba(26,92,46,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s}
.video-card:hover .play-btn{opacity:1}
.play-btn::after{content:'';border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:3px}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:12px}
.video-info{padding:14px 16px}
.video-info h3{font-size:15px;margin-bottom:6px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:12px;font-size:12px;color:#999}
.video-meta span{display:flex;align-items:center;gap:3px}
.video-tag{display:inline-block;background:#eef5e9;color:#1a5c2e;padding:2px 8px;border-radius:10px;font-size:11px;margin-top:6px}

/* Service Cards */
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.service-card{background:#fff;padding:36px 28px;border-radius:12px;text-align:center;box-shadow:0 4px 16px rgba(0,0,0,.06);transition:all .3s;border-top:4px solid transparent}
.service-card:hover{border-top-color:#c8a832;transform:translateY(-4px)}
.service-icon{width:64px;height:64px;background:linear-gradient(135deg,#1a5c2e,#2d8a4e);border-radius:16px;display:flex;align-items:center;justify-content:center;margin:0 auto 18px;font-size:28px;color:#fff}
.service-card h3{font-size:18px;color:#1a5c2e;margin-bottom:10px}
.service-card p{font-size:14px;color:#666;line-height:1.8}

/* AI Section */
.ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.ai-card{background:linear-gradient(135deg,#0e3a1a,#1a5c2e);padding:36px 28px;border-radius:16px;color:#fff;text-align:center;transition:transform .3s}
.ai-card:hover{transform:translateY(-4px)}
.ai-card .ai-icon{font-size:48px;margin-bottom:16px}
.ai-card h3{font-size:20px;margin-bottom:12px;color:#c8a832}
.ai-card p{font-size:14px;opacity:.9;line-height:1.8}

/* Community Section */
.community-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.community-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,.06);transition:all .3s}
.community-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.12)}
.community-card img{width:100%;height:200px;object-fit:cover}
.community-card-body{padding:18px}
.community-card-body h3{font-size:16px;color:#1a5c2e;margin-bottom:8px}
.community-card-body p{font-size:13px;color:#666;line-height:1.7}
.community-stats{display:flex;gap:14px;margin-top:10px;font-size:12px;color:#999}

/* Expert Section */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.expert-card{background:#fff;border-radius:12px;overflow:hidden;text-align:center;box-shadow:0 4px 16px rgba(0,0,0,.06);transition:all .3s;padding-bottom:20px}
.expert-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.12)}
.expert-card img{width:100%;height:240px;object-fit:cover}
.expert-card h3{font-size:17px;color:#1a5c2e;margin:14px 0 4px}
.expert-card .role{color:#c8a832;font-size:13px;margin-bottom:8px}
.expert-card p{font-size:13px;color:#666;padding:0 16px;line-height:1.7}
.expert-links{display:flex;justify-content:center;gap:10px;margin-top:12px}
.expert-links a{padding:6px 14px;border:1px solid #1a5c2e;border-radius:20px;font-size:12px;color:#1a5c2e;transition:all .3s}
.expert-links a:hover{background:#1a5c2e;color:#fff}

/* How-To Section */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.howto-step{background:#fff;padding:30px 24px;border-radius:12px;text-align:center;position:relative;box-shadow:0 4px 16px rgba(0,0,0,.06)}
.howto-step::before{counter-increment:step;content:counter(step);width:48px;height:48px;background:#c8a832;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:700;margin:0 auto 16px}
.howto-step h3{font-size:17px;color:#1a5c2e;margin-bottom:10px}
.howto-step p{font-size:13px;color:#666;line-height:1.7}

/* Partners */
.partner-logos{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-logos .partner-item{background:#fff;padding:16px 28px;border-radius:10px;box-shadow:0 2px 10px rgba(0,0,0,.05);font-size:16px;color:#1a5c2e;font-weight:600;transition:all .3s}
.partner-logos .partner-item:hover{box-shadow:0 4px 20px rgba(0,0,0,.12);transform:translateY(-2px)}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:10px;margin-bottom:12px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.04)}
.faq-question{padding:18px 24px;font-size:16px;font-weight:600;color:#1a5c2e;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .3s}
.faq-question:hover{background:#eef5e9}
.faq-question::after{content:'+';font-size:22px;color:#c8a832;transition:transform .3s}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all .4s;font-size:14px;color:#666;line-height:1.8}
.faq-item.active .faq-answer{padding:0 24px 18px;max-height:300px}

/* Reviews */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:#fff;padding:28px;border-radius:12px;box-shadow:0 4px 16px rgba(0,0,0,.06)}
.review-stars{color:#c8a832;font-size:18px;margin-bottom:10px}
.review-text{font-size:14px;color:#555;line-height:1.8;margin-bottom:14px;font-style:italic}
.review-author{display:flex;align-items:center;gap:10px}
.review-avatar{width:40px;height:40px;border-radius:50%;background:#2d8a4e;color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700}
.review-name{font-size:14px;color:#333;font-weight:600}
.review-date{font-size:12px;color:#999}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-info h3{font-size:20px;color:#1a5c2e;margin-bottom:16px}
.contact-item{display:flex;align-items:flex-start;gap:12px;margin-bottom:16px;font-size:14px}
.contact-item .label{font-weight:600;color:#1a5c2e;min-width:80px}
.contact-item .value{color:#555}
.contact-qr{display:flex;gap:24px}
.contact-qr .qr-item{text-align:center}
.contact-qr .qr-item img{width:140px;height:140px;border-radius:8px;margin-bottom:8px}
.contact-qr .qr-item p{font-size:13px;color:#666}

/* Social Share */
.share-section{text-align:center;padding:30px 0}
.share-btns{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}
.share-btn{padding:10px 22px;border-radius:25px;color:#fff;font-size:14px;transition:all .3s;cursor:pointer;border:none}
.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:#0e3a1a;color:#ccc;padding:40px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.footer-col h4{color:#c8a832;font-size:16px;margin-bottom:14px}
.footer-col p{font-size:13px;line-height:1.8;color:#aaa}
.footer-col a{color:#aaa;font-size:13px;display:block;margin-bottom:8px;transition:color .3s}
.footer-col a:hover{color:#c8a832}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-logo img{height:40px}
.footer-logo span{color:#fff;font-size:18px;font-weight:700}
.footer-bottom{text-align:center;padding:18px 0;border-top:1px solid rgba(255,255,255,.1);font-size:13px;color:#888}

/* Responsive */
@media(max-width:1024px){
.video-grid{grid-template-columns:repeat(2,1fr)}
.service-grid,.ai-grid,.community-grid{grid-template-columns:repeat(2,1fr)}
.expert-grid{grid-template-columns:repeat(2,1fr)}
.howto-steps{grid-template-columns:repeat(2,1fr)}
.footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
.header-inner{flex-wrap:wrap}
.main-nav{display:none;width:100%;flex-direction:column;padding-top:10px}
.main-nav.active{display:flex}
.mobile-menu-btn{display:block}
.banner{height:380px}
.banner-content h1{font-size:28px}
.banner-content h2{font-size:16px}
.video-grid,.service-grid,.ai-grid,.community-grid,.review-grid{grid-template-columns:1fr}
.expert-grid{grid-template-columns:repeat(2,1fr)}
.howto-steps{grid-template-columns:1fr}
.contact-grid{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr}
.search-box{flex-direction:column}
.search-box button{width:100%}
}
@media(max-width:480px){
.expert-grid{grid-template-columns:1fr}
.banner{height:300px}
.banner-content h1{font-size:22px}
.section{padding:40px 0}
}

/* Lazy Load */
img[loading="lazy"]{transition:opacity .5s}
img.loaded{opacity:1}

/* Interference tags - hidden */
.xr7k2m,.qp3n8v,.ht5w1j,.bz9c4f,.yk6d3r,.wm2e7s,.jn8g5t,.cv4h9u,.fx1i6a,.dl3j7b,.kw3p7q,.gp1x4y,.hw3p7q,.ip1x4y,.jw3p7q,.kp1x4y,.lw3p7q,.mp1x4y{position:absolute;width:0;height:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;padding:0;margin:-1px}