/* 91植物视频社区 - 全站样式表 */
/* Reset & Base */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;color:#333;line-height:1.8;background:#f8f9fa}
a{color:#2d8c3c;text-decoration:none;transition:color .3s}
a:hover{color:#1a6b28}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.clearfix::after{content:"";display:table;clear:both}

/* Header */
.site-header{background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.08);position:sticky;top:0;z-index:1000}
.header-top{display:flex;align-items:center;justify-content:space-between;padding:10px 0}
.logo-wrap{display:flex;align-items:center;gap:12px}
.logo-wrap img{width:50px;height:50px}
.logo-wrap h1{font-size:22px;color:#2d8c3c;font-weight:700}
.logo-wrap h1 span{color:#d4a017}

/* Navigation */
.main-nav{background:#2d8c3c}
.main-nav ul{display:flex;justify-content:center;flex-wrap:wrap}
.main-nav li{position:relative}
.main-nav a{display:block;padding:12px 22px;color:#fff;font-size:15px;font-weight:500;transition:background .3s}
.main-nav a:hover,.main-nav a.active{background:#1a6b28;color:#fff}

/* Search Bar */
.search-bar{background:#f0f7f0;padding:12px 0;border-bottom:1px solid #e0e8e0}
.search-bar form{display:flex;max-width:600px;margin:0 auto}
.search-bar input[type="text"]{flex:1;padding:10px 16px;border:2px solid #2d8c3c;border-right:none;border-radius:25px 0 0 25px;font-size:14px;outline:none}
.search-bar input[type="text"]:focus{border-color:#1a6b28;box-shadow:0 0 5px rgba(45,140,60,.3)}
.search-bar button{padding:10px 24px;background:#2d8c3c;color:#fff;border:2px solid #2d8c3c;border-radius:0 25px 25px 0;cursor:pointer;font-size:14px;transition:background .3s}
.search-bar button:hover{background:#1a6b28}

/* Banner */
.banner{position:relative;height:500px;overflow:hidden;background:#1a3a1a}
.banner img{width:100%;height:100%;object-fit:cover;opacity:.85}
.banner-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,rgba(0,0,0,.6) 0%,rgba(45,140,60,.4) 100%);display:flex;align-items:center;justify-content:center;text-align:center;padding:20px}
.banner-content{max-width:800px;color:#fff}
.banner-content h2{font-size:42px;margin-bottom:16px;text-shadow:2px 2px 8px rgba(0,0,0,.5);line-height:1.3}
.banner-content p{font-size:18px;margin-bottom:24px;text-shadow:1px 1px 4px rgba(0,0,0,.5);line-height:1.6}
.btn-primary{display:inline-block;padding:14px 36px;background:#d4a017;color:#fff;border-radius:30px;font-size:16px;font-weight:600;transition:all .3s;border:none;cursor:pointer}
.btn-primary:hover{background:#b8860b;transform:translateY(-2px);box-shadow:0 4px 15px rgba(212,160,23,.4);color:#fff}
.btn-outline{display:inline-block;padding:12px 30px;border:2px solid #fff;color:#fff;border-radius:30px;font-size:15px;margin-left:12px;transition:all .3s}
.btn-outline:hover{background:#fff;color:#2d8c3c}

/* Section Titles */
.section{padding:60px 0}
.section-alt{background:#fff}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:32px;color:#2d8c3c;margin-bottom:10px;position:relative;display:inline-block}
.section-title h2::after{content:"";display:block;width:60px;height:3px;background:#d4a017;margin:10px auto 0}
.section-title h3{font-size:20px;color:#2d8c3c;margin-bottom:8px}
.section-title p{color:#666;font-size:16px;max-width:700px;margin:0 auto}

/* Video Cards */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,.08);transition:all .3s}
.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;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .video-thumb img{transform:scale(1.05)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;background:rgba(45,140,60,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;cursor:pointer}
.video-card:hover .play-btn{opacity: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:4px}
.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:16px}
.video-info h4{font-size:16px;color:#333;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;color:#999;font-size:13px}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tags{margin-top:8px;display:flex;flex-wrap:wrap;gap:6px}
.video-tags span{display:inline-block;padding:2px 10px;background:#f0f7f0;color:#2d8c3c;border-radius:12px;font-size:12px}

/* Feature Modules */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.feature-card{background:#fff;border-radius:12px;padding:30px 24px;text-align:center;box-shadow:0 4px 15px rgba(0,0,0,.06);transition:all .3s;border:1px solid #e8f0e8}
.feature-card:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(45,140,60,.12);border-color:#2d8c3c}
.feature-icon{width:64px;height:64px;margin:0 auto 16px;background:linear-gradient(135deg,#2d8c3c,#4caf50);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:28px;color:#fff}
.feature-card h4{font-size:18px;color:#2d8c3c;margin-bottom:10px}
.feature-card p{color:#666;font-size:14px;line-height:1.7}

/* Expert Cards */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.expert-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,.08);text-align:center;padding:30px 20px;transition:all .3s}
.expert-card:hover{transform:translateY(-3px);box-shadow:0 8px 20px rgba(0,0,0,.12)}
.expert-avatar{width:100px;height:100px;border-radius:50%;margin:0 auto 16px;background:#e8f0e8;display:flex;align-items:center;justify-content:center;font-size:36px;color:#2d8c3c;border:3px solid #2d8c3c}
.expert-card h4{font-size:18px;color:#333;margin-bottom:4px}
.expert-card .role{color:#2d8c3c;font-size:14px;margin-bottom:10px}
.expert-card p{color:#666;font-size:13px;line-height:1.6;margin-bottom:12px}
.expert-links{display:flex;justify-content:center;gap:10px}
.expert-links a{padding:6px 16px;border:1px solid #2d8c3c;color:#2d8c3c;border-radius:20px;font-size:13px;transition:all .3s}
.expert-links a:hover{background:#2d8c3c;color:#fff}

/* 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-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:#333;transition:background .3s}
.faq-question:hover{background:#f0f7f0}
.faq-question::after{content:"+";font-size:22px;color:#2d8c3c;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 ease;color:#666;line-height:1.8}
.faq-item.active .faq-answer{padding:0 24px 18px;max-height:500px}

/* Reviews */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.review-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 15px rgba(0,0,0,.06);border-left:4px solid #2d8c3c}
.review-stars{color:#d4a017;font-size:16px;margin-bottom:8px}
.review-card p{color:#555;font-size:14px;line-height:1.7;margin-bottom:12px;font-style:italic}
.review-author{display:flex;align-items:center;gap:10px}
.review-author .avatar{width:40px;height:40px;border-radius:50%;background:#e8f0e8;display:flex;align-items:center;justify-content:center;color:#2d8c3c;font-weight:700;font-size:16px}
.review-author .info{font-size:13px;color:#999}
.review-author .info strong{color:#333;display:block}

/* Partner Logos */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-item{width:140px;height:80px;background:#fff;border-radius:10px;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 10px rgba(0,0,0,.06);padding:10px;transition:all .3s;border:1px solid #eee}
.partner-item:hover{box-shadow:0 4px 15px rgba(45,140,60,.15);border-color:#2d8c3c}
.partner-item span{font-size:14px;color:#666;font-weight:600;text-align:center}

/* How-To Guide */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:24px;margin-top:30px}
.howto-step{text-align:center;padding:24px;background:#fff;border-radius:12px;box-shadow:0 2px 10px rgba(0,0,0,.06)}
.step-number{width:50px;height:50px;background:#2d8c3c;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:700;margin:0 auto 14px}
.howto-step h4{color:#333;margin-bottom:8px}
.howto-step p{color:#666;font-size:14px}

/* Contact */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:30px}
.contact-card{background:#fff;border-radius:12px;padding:30px;box-shadow:0 4px 15px rgba(0,0,0,.06)}
.contact-card h4{color:#2d8c3c;font-size:18px;margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid #e8f0e8}
.contact-card p{color:#555;font-size:14px;margin-bottom:8px;line-height:1.7}
.contact-card .qr-wrap{display:flex;gap:20px;margin-top:16px}
.contact-card .qr-wrap img{width:120px;height:120px;border-radius:8px}

/* Share Buttons */
.share-bar{display:flex;justify-content:center;gap:12px;padding:20px 0}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 20px;border-radius:25px;color:#fff;font-size:14px;transition:all .3s;cursor:pointer}
.share-btn:hover{transform:translateY(-2px);opacity:.9;color:#fff}
.share-wechat{background:#07c160}
.share-weibo{background:#e6162d}
.share-douyin{background:#161823}
.share-bilibili{background:#00a1d6}

/* Footer */
.site-footer{background:#1a3a1a;color:#ccc;padding:40px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:30px;padding-bottom:30px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:16px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:"";display:block;width:30px;height:2px;background:#d4a017;position:absolute;bottom:0;left:0}
.footer-col p,.footer-col a{color:#aaa;font-size:14px;line-height:2}
.footer-col a:hover{color:#4caf50}
.footer-col ul li a{display:block;padding:2px 0}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;text-align:center;font-size:13px;color:#888}
.footer-bottom a{color:#aaa}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.footer-logo img{width:40px;height:40px}
.footer-logo span{color:#fff;font-size:20px;font-weight:700}

/* Breadcrumb */
.breadcrumb{padding:12px 0;font-size:14px;color:#999}
.breadcrumb a{color:#2d8c3c}
.breadcrumb span{margin:0 6px;color:#ccc}

/* MCP Frontend Mock */
.mcp-widget{background:#f8f9fa;border:1px solid #e0e0e0;border-radius:8px;padding:16px;margin-top:20px;text-align:center}
.mcp-widget .mcp-status{display:inline-block;width:8px;height:8px;background:#4caf50;border-radius:50%;margin-right:6px}
.mcp-widget p{font-size:13px;color:#666}

/* Responsive */
@media(max-width:768px){
  .banner{height:350px}
  .banner-content h2{font-size:26px}
  .banner-content p{font-size:15px}
  .header-top{flex-direction:column;gap:8px}
  .main-nav ul{flex-direction:column}
  .main-nav a{padding:10px 16px;text-align:center}
  .section{padding:40px 0}
  .section-title h2{font-size:24px}
  .video-grid,.feature-grid,.expert-grid,.review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .share-bar{flex-wrap:wrap}
  .btn-outline{margin-left:0;margin-top:10px}
}
@media(max-width:480px){
  .banner{height:280px}
  .banner-content h2{font-size:22px}
  .container{padding:0 15px}
  .logo-wrap h1{font-size:18px}
}

/* Lazy Load */
img[data-src]{opacity:0;transition:opacity .5s}
img.loaded{opacity:1}

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

/* Interference tags - hidden */
.d-none{display:none!important;visibility:hidden;width:0;height:0;overflow:hidden;position:absolute;left:-9999px}

/* 移动端汉堡菜单按钮 */
.nav-toggle{display:none;background:none;border:none;font-size:28px;color:#2d8c3c;cursor:pointer;padding:8px 12px;position:absolute;right:20px;top:12px;z-index:1001}
@media(max-width:768px){
  .nav-toggle{display:block}
  .main-nav ul{display:none;flex-direction:column}
  .main-nav ul.show{display:flex}
  .site-header{position:relative}
}

/* 返回顶部按钮 */
.back-to-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;background:#2d8c3c;color:#fff;border-radius:50%;display:none;align-items:center;justify-content:center;font-size:18px;text-decoration:none;box-shadow:0 4px 12px rgba(0,0,0,.2);transition:all .3s;z-index:999;text-align:center;line-height:44px}
.back-to-top:hover{background:#1a6b28;transform:translateY(-3px);color:#fff}
.back-to-top.visible{display:flex}

/* 视频播放模拟覆盖层 */
.video-playing-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.85);display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:10;border-radius:12px 12px 0 0}
.video-playing-overlay .loading-spinner{width:40px;height:40px;border:3px solid rgba(255,255,255,.3);border-top:3px solid #fff;border-radius:50%;animation:spin 1s linear infinite}
.video-playing-overlay p{color:#fff;font-size:14px;margin-top:12px}
@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}

/* 视频卡片增强 - 进度条模拟 */
.video-progress{position:absolute;bottom:0;left:0;height:3px;background:#2d8c3c;width:0;transition:width 3s linear;z-index:11}

/* 面包屑增强 */
.breadcrumb-nav{background:#f8f9fa;border-bottom:1px solid #eee}
.breadcrumb-nav .container{padding-top:10px;padding-bottom:10px}

/* 专家卡片增强 - 6列网格 */
@media(min-width:992px){
  .expert-grid{grid-template-columns:repeat(3,1fr)}
}

/* 视频标签页切换 */
.tab-nav{display:flex;justify-content:center;gap:8px;margin-bottom:24px;flex-wrap:wrap}
.tab-nav .tab-btn{padding:8px 20px;border:2px solid #2d8c3c;color:#2d8c3c;border-radius:20px;background:transparent;cursor:pointer;font-size:14px;transition:all .3s}
.tab-nav .tab-btn.active,.tab-nav .tab-btn:hover{background:#2d8c3c;color:#fff}

/* 统计数字动画 */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center;padding:30px 0}
.stat-item .stat-number{font-size:36px;font-weight:700;color:#2d8c3c}
.stat-item .stat-label{font-size:14px;color:#666;margin-top:4px}
@media(max-width:768px){
  .stat-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:480px){
  .stat-grid{grid-template-columns:1fr}
}