/* 91植物视频社区 - 全站样式表 */
/* mndgfa.cn */

/* ===== 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","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;color:#333;line-height:1.8;background:#f8f9f0}
a{color:#2d6a2e;text-decoration:none;transition:color .3s}
a:hover{color:#1a8c1a}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.4;color:#1a3c1a}

/* ===== Header & Navigation ===== */
.site-header{background:linear-gradient(135deg,#0a2e0a 0%,#1a5c1a 50%,#0d3d0d 100%);position:sticky;top:0;z-index:1000;box-shadow:0 2px 15px rgba(0,0,0,.3)}
.header-inner{max-width:1400px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:70px}
.site-logo{display:flex;align-items:center;gap:10px}
.site-logo img{height:45px;width:auto;border-radius:6px}
.site-logo span{color:#fff;font-size:22px;font-weight:800;letter-spacing:2px}
.main-nav{display:flex;gap:0}
.main-nav a{color:rgba(255,255,255,.9);padding:0 16px;height:70px;display:flex;align-items:center;font-size:15px;font-weight:500;transition:all .3s;position:relative}
.main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(255,255,255,.1)}
.main-nav a::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:3px;background:#4caf50;transition:width .3s}
.main-nav a:hover::after,.main-nav a.active::after{width:60%}
.mobile-menu-btn{display:none;color:#fff;font-size:28px;cursor:pointer;background:none;border:none}

/* ===== Search Bar ===== */
.search-bar{background:linear-gradient(90deg,#e8f5e9,#f1f8e9);padding:12px 0;border-bottom:1px solid #c8e6c9}
.search-bar-inner{max-width:1400px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:center;gap:10px}
.search-bar input{width:100%;max-width:600px;padding:10px 20px;border:2px solid #4caf50;border-radius:25px;font-size:15px;outline:none;transition:border-color .3s;background:#fff}
.search-bar input:focus{border-color:#2e7d32;box-shadow:0 0 8px rgba(76,175,80,.3)}
.search-bar button{padding:10px 28px;background:linear-gradient(135deg,#4caf50,#2e7d32);color:#fff;border:none;border-radius:25px;font-size:15px;cursor:pointer;transition:transform .2s,box-shadow .2s;font-weight:600}
.search-bar button:hover{transform:scale(1.05);box-shadow:0 4px 12px rgba(46,125,50,.4)}

/* ===== Banner ===== */
.banner{position:relative;height:520px;overflow:hidden;background:#0a2e0a}
.banner img{width:100%;height:100%;object-fit:cover;opacity:.7}
.banner-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(180deg,rgba(0,0,0,.2) 0%,rgba(0,0,0,.6) 100%);display:flex;align-items:center;justify-content:center}
.banner-content{text-align:center;color:#fff;max-width:800px;padding:0 20px}
.banner-content h1{font-size:48px;margin-bottom:16px;text-shadow:2px 2px 8px rgba(0,0,0,.5);letter-spacing:3px}
.banner-content p{font-size:18px;line-height:1.8;text-shadow:1px 1px 4px rgba(0,0,0,.5);margin-bottom:20px}
.banner-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:15px}
.banner-tags span{background:rgba(76,175,80,.7);padding:5px 15px;border-radius:20px;font-size:13px;color:#fff}

/* ===== Breadcrumb ===== */
.breadcrumb{background:#e8f5e9;padding:10px 0;font-size:14px}
.breadcrumb-inner{max-width:1400px;margin:0 auto;padding:0 20px}
.breadcrumb a{color:#2e7d32}
.breadcrumb span{color:#666;margin:0 6px}

/* ===== Section Common ===== */
.section{padding:60px 0}
.section-alt{background:#fff}
.section-inner{max-width:1400px;margin:0 auto;padding:0 20px}
.section-header{text-align:center;margin-bottom:45px}
.section-header h2{font-size:32px;color:#1a3c1a;margin-bottom:10px;position:relative;display:inline-block}
.section-header h2::after{content:'';display:block;width:60px;height:4px;background:linear-gradient(90deg,#4caf50,#81c784);margin:12px auto 0;border-radius:2px}
.section-header p{color:#666;font-size:16px;margin-top:10px}

/* ===== Video Card Grid ===== */
.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 20px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s;position:relative}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 35px rgba(0,0,0,.15)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#1a3c1a}
.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(1.08)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;background:rgba(76,175,80,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s,transform .3s;cursor:pointer}
.play-btn::after{content:'';border-style:solid;border-width:12px 0 12px 22px;border-color:transparent transparent transparent #fff;margin-left:4px}
.video-card:hover .play-btn{opacity:1;transform:translate(-50%,-50%) scale(1.1)}
.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-stats{position:absolute;bottom:8px;left:8px;display:flex;gap:10px;color:#fff;font-size:12px}
.video-stats span{background:rgba(0,0,0,.6);padding:2px 8px;border-radius:4px}
.video-info{padding:15px}
.video-info h3{font-size:15px;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.5}
.video-info .meta{display:flex;justify-content:space-between;color:#999;font-size:13px}
.video-tags{display:flex;gap:5px;margin-top:8px;flex-wrap:wrap}
.video-tags span{background:#e8f5e9;color:#2e7d32;padding:2px 10px;border-radius:12px;font-size:12px}

/* ===== Feature Modules ===== */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.feature-card{background:#fff;border-radius:12px;padding:35px 25px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:transform .3s}
.feature-card:hover{transform:translateY(-5px)}
.feature-icon{width:70px;height:70px;background:linear-gradient(135deg,#e8f5e9,#c8e6c9);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 20px;font-size:32px}
.feature-card h3{font-size:18px;margin-bottom:10px;color:#1a3c1a}
.feature-card p{color:#666;font-size:14px;line-height:1.7}

/* ===== Expert Section ===== */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,.08);text-align:center;transition:transform .3s}
.expert-card:hover{transform:translateY(-5px)}
.expert-card img{width:100%;height:250px;object-fit:cover}
.expert-card .info{padding:20px}
.expert-card h4{font-size:17px;color:#1a3c1a;margin-bottom:5px}
.expert-card .title{color:#4caf50;font-size:13px;margin-bottom:8px}
.expert-card p{color:#666;font-size:13px;line-height:1.6}
.expert-card .btn-group{display:flex;gap:8px;justify-content:center;margin-top:12px}
.expert-card .btn-group a{padding:6px 16px;border-radius:20px;font-size:13px;border:1px solid #4caf50;color:#4caf50;transition:all .3s}
.expert-card .btn-group a:hover{background:#4caf50;color:#fff}

/* ===== FAQ Section ===== */
.faq-list{max-width:900px;margin:0 auto}
.faq-item{background:#fff;border-radius:10px;margin-bottom:12px;box-shadow:0 2px 10px rgba(0,0,0,.05);overflow:hidden}
.faq-question{padding:18px 25px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:16px;color:#1a3c1a;transition:background .3s}
.faq-question:hover{background:#f1f8e9}
.faq-question::after{content:'+';font-size:22px;color:#4caf50;transition:transform .3s}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 25px;max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease;color:#555;line-height:1.8;font-size:15px}
.faq-item.active .faq-answer{max-height:300px;padding:0 25px 18px}

/* ===== Reviews ===== */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.review-card{background:#fff;border-radius:12px;padding:25px;box-shadow:0 4px 20px rgba(0,0,0,.06);position:relative}
.review-card::before{content:'\201C';font-size:60px;color:#c8e6c9;position:absolute;top:10px;left:15px;line-height:1}
.review-content{padding-left:30px;margin-bottom:15px;color:#555;font-size:14px;line-height:1.8;font-style:italic}
.review-author{display:flex;align-items:center;gap:12px;padding-left:30px}
.review-author .avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#4caf50,#81c784);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:16px}
.review-author .name{font-weight:600;color:#1a3c1a;font-size:14px}
.review-author .date{color:#999;font-size:12px}
.review-stars{color:#ffc107;margin-bottom:8px;padding-left:30px;font-size:16px}

/* ===== Partner Logos ===== */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-wall .partner-item{background:#fff;padding:20px 30px;border-radius:10px;box-shadow:0 2px 10px rgba(0,0,0,.05);font-size:18px;font-weight:700;color:#2e7d32;transition:transform .3s}
.partner-wall .partner-item:hover{transform:scale(1.05)}

/* ===== How To Guide ===== */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.howto-step{background:#fff;border-radius:12px;padding:30px 20px;text-align:center;box-shadow:0 4px 15px rgba(0,0,0,.06);position:relative;counter-increment:step}
.howto-step::before{content:counter(step);width:40px;height:40px;background:linear-gradient(135deg,#4caf50,#2e7d32);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:18px;margin:0 auto 15px}
.howto-step h4{font-size:16px;color:#1a3c1a;margin-bottom:8px}
.howto-step p{color:#666;font-size:14px;line-height:1.6}

/* ===== Contact Section ===== */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.contact-card{background:#fff;border-radius:12px;padding:30px;text-align:center;box-shadow:0 4px 15px rgba(0,0,0,.06)}
.contact-card h4{font-size:18px;color:#1a3c1a;margin-bottom:15px}
.contact-card p{color:#666;font-size:14px;line-height:1.8}
.contact-card img{max-width:180px;margin:15px auto 0;border-radius:8px}

/* ===== Social Share ===== */
.social-share{display:flex;justify-content:center;gap:15px;margin-top:30px}
.social-share a{width:45px;height:45px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;transition:transform .3s,box-shadow .3s}
.social-share a:hover{transform:scale(1.15);box-shadow:0 4px 15px rgba(0,0,0,.2)}
.share-wechat{background:#07c160}
.share-weibo{background:#e6162d}
.share-douyin{background:#000}
.share-bilibili{background:#00a1d6}

/* ===== Footer ===== */
.site-footer{background:linear-gradient(135deg,#0a2e0a,#1a4c1a);color:rgba(255,255,255,.8);padding:50px 0 0}
.footer-inner{max-width:1400px;margin:0 auto;padding:0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-col h4{color:#fff;font-size:17px;margin-bottom:18px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:3px;background:#4caf50;border-radius:2px}
.footer-col p,.footer-col a{color:rgba(255,255,255,.7);font-size:14px;line-height:2}
.footer-col a:hover{color:#4caf50}
.footer-col .logo-footer{display:flex;align-items:center;gap:10px;margin-bottom:15px}
.footer-col .logo-footer img{height:40px;border-radius:6px}
.footer-col .logo-footer span{color:#fff;font-size:20px;font-weight:800}
.footer-qr{display:flex;gap:15px;margin-top:10px}
.footer-qr img{width:100px;border-radius:6px}
.footer-bottom{text-align:center;padding:20px 0;font-size:13px;color:rgba(255,255,255,.5)}
.footer-bottom a{color:rgba(255,255,255,.6)}
.update-time{margin-top:5px;font-size:12px;color:rgba(255,255,255,.4)}

/* ===== MCP Frontend Placeholder ===== */
.mcp-widget{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:8px;padding:15px;margin-top:15px;text-align:center;font-size:13px;color:rgba(255,255,255,.4)}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .feature-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{height:60px}
  .main-nav{display:none;position:absolute;top:60px;left:0;right:0;background:#0a2e0a;flex-direction:column;padding:10px 0;box-shadow:0 5px 15px rgba(0,0,0,.3)}
  .main-nav.active{display:flex}
  .main-nav a{height:auto;padding:12px 20px;border-bottom:1px solid rgba(255,255,255,.05)}
  .mobile-menu-btn{display:block}
  .banner{height:350px}
  .banner-content h1{font-size:28px}
  .banner-content p{font-size:15px}
  .video-grid{grid-template-columns:repeat(2,1fr);gap:15px}
  .feature-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:40px 0}
  .section-header h2{font-size:24px}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .search-bar-inner{flex-direction:column}
  .search-bar input{max-width:100%}
}

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

/* ===== Interference Tags (hidden) ===== */
.itf{position:absolute;width:0;height:0;overflow:hidden;opacity:0;pointer-events:none;z-index:-9999}

/* ===== Video Tag Styles ===== */
.video-thumb video{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;z-index:0}
.video-thumb img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;z-index:1;transition:transform .5s}
.video-card:hover .video-thumb img{transform:scale(1.08)}
.play-btn{z-index:2}
.video-duration{z-index:2}
.video-stats{z-index:2}

/* ===== Back to Top ===== */
#backToTop{transition:opacity .3s}
#backToTop:hover{background:#2e7d32;transform:scale(1.1)}