/* 91植物视频社区 - 全站样式 172785.cn */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:#2d3436;line-height:1.7;background:#f8faf5}
a{color:#27ae60;text-decoration:none;transition:color .3s}
a:hover{color:#1e8449}
img{max-width:100%;height:auto}
.site-header{background:linear-gradient(135deg,#1a5c2e 0%,#27ae60 50%,#2ecc71 100%);color:#fff;position:sticky;top:0;z-index:1000;box-shadow:0 2px 15px rgba(0,0,0,.15)}
.header-inner{max-width:1280px;margin:0 auto;padding:0 20px;display:flex;align-items:center;height:68px;gap:20px}
.logo-link{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:1.3rem}
.logo-link img{border-radius:50%;border:2px solid rgba(255,255,255,.3)}
.logo-text{white-space:nowrap}
.main-nav ul{display:flex;list-style:none;gap:6px}
.main-nav a{color:rgba(255,255,255,.9);padding:8px 14px;border-radius:6px;font-size:.95rem;transition:all .3s}
.main-nav a:hover,.main-nav a.active{background:rgba(255,255,255,.2);color:#fff}
.search-box{display:flex;margin-left:auto;background:rgba(255,255,255,.15);border-radius:25px;overflow:hidden}
.search-box input{border:none;background:transparent;color:#fff;padding:8px 16px;width:180px;font-size:.9rem;outline:none}
.search-box input::placeholder{color:rgba(255,255,255,.6)}
.search-box button{border:none;background:rgba(255,255,255,.2);color:#fff;padding:8px 16px;cursor:pointer;font-size:.9rem;transition:background .3s}
.search-box button:hover{background:rgba(255,255,255,.35)}
.mobile-menu-btn{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}
/* Banner */
.hero-banner{position:relative;height:520px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hero-banner img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(26,92,46,.85),rgba(39,174,96,.7))}
.hero-content{position:relative;z-index:2;text-align:center;color:#fff;max-width:800px;padding:0 20px}
.hero-content h1{font-size:2.8rem;margin-bottom:16px;text-shadow:0 2px 10px rgba(0,0,0,.3)}
.hero-content p{font-size:1.15rem;line-height:1.8;margin-bottom:20px;opacity:.95}
.hero-badges{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-top:20px}
.hero-badges span{background:rgba(255,255,255,.15);backdrop-filter:blur(10px);padding:8px 20px;border-radius:25px;font-size:.9rem;border:1px solid rgba(255,255,255,.2)}
/* Sections */
.section{padding:60px 20px}
.section-inner{max-width:1200px;margin:0 auto}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:2rem;color:#1a5c2e;margin-bottom:10px}
.section-title p{color:#636e72;font-size:1.05rem}
.section-alt{background:#eef5e9}
/* Video Cards */
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 15px 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,.video-thumb video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.4);opacity:0;transition:opacity .3s;cursor:pointer}
.video-thumb:hover .play-btn{opacity:1}
.play-btn::after{content:"";width:60px;height:60px;background:rgba(39,174,96,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;clip-path:polygon(35% 25%,35% 75%,75% 50%)}
.video-info{padding:16px}
.video-info h3{font-size:1.05rem;margin-bottom:8px;color:#2d3436}
.video-info .video-meta{display:flex;gap:12px;color:#b2bec3;font-size:.85rem}
.video-info .video-tags{margin-top:8px;display:flex;gap:6px;flex-wrap:wrap}
.video-info .video-tags span{background:#eef5e9;color:#27ae60;padding:3px 10px;border-radius:12px;font-size:.8rem}
/* Expert Cards */
.expert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.expert-card{background:#fff;border-radius:12px;padding:30px;text-align:center;box-shadow:0 4px 15px rgba(0,0,0,.08);transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-card .avatar{width:90px;height:90px;border-radius:50%;margin:0 auto 16px;background:linear-gradient(135deg,#27ae60,#2ecc71);display:flex;align-items:center;justify-content:center;color:#fff;font-size:2rem;font-weight:700}
.expert-card h3{font-size:1.1rem;color:#1a5c2e;margin-bottom:6px}
.expert-card .role{color:#27ae60;font-size:.9rem;margin-bottom:10px}
.expert-card p{color:#636e72;font-size:.9rem;line-height:1.6}
.expert-card .expert-links{margin-top:12px;display:flex;gap:10px;justify-content:center}
.expert-card .expert-links a{background:#eef5e9;color:#27ae60;padding:6px 14px;border-radius:20px;font-size:.85rem;transition:all .3s}
.expert-card .expert-links a:hover{background:#27ae60;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-q{padding:18px 24px;cursor:pointer;font-weight:600;color:#1a5c2e;display:flex;justify-content:space-between;align-items:center;font-size:1.02rem}
.faq-q::after{content:"+";font-size:1.4rem;transition:transform .3s;color:#27ae60}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:all .3s;color:#636e72;line-height:1.7}
.faq-item.open .faq-a{padding:0 24px 18px;max-height:500px}
/* Reviews */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.review-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 15px rgba(0,0,0,.08)}
.review-card .stars{color:#f39c12;font-size:1.1rem;margin-bottom:10px}
.review-card blockquote{color:#2d3436;font-size:.95rem;line-height:1.7;margin-bottom:12px;font-style:italic}
.review-card .reviewer{display:flex;align-items:center;gap:10px}
.review-card .reviewer-avatar{width:40px;height:40px;border-radius:50%;background:#27ae60;color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.review-card .reviewer-info{font-size:.9rem;color:#636e72}
/* Brand Wall */
.brand-wall{display:flex;gap:30px;justify-content:center;flex-wrap:wrap;align-items:center}
.brand-wall span{background:#fff;padding:16px 28px;border-radius:10px;font-size:1rem;color:#636e72;box-shadow:0 2px 8px rgba(0,0,0,.06);font-weight:600}
/* How-To */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;max-width:900px;margin:0 auto}
.howto-step{text-align:center;padding:24px 16px}
.howto-step .step-num{width:50px;height:50px;border-radius:50%;background:linear-gradient(135deg,#27ae60,#2ecc71);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.3rem;font-weight:700;margin:0 auto 14px}
.howto-step h4{color:#1a5c2e;margin-bottom:8px}
.howto-step p{color:#636e72;font-size:.9rem}
/* Share */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-bar a{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:25px;color:#fff;font-size:.9rem;transition:opacity .3s}
.share-bar a:hover{opacity:.85;color:#fff}
.share-wechat{background:#07c160}
.share-weibo{background:#e6162d}
.share-douyin{background:#161823}
.share-bilibili{background:#00a1d6}
/* Breadcrumb */
.breadcrumb{padding:12px 20px;max-width:1200px;margin:0 auto;font-size:.9rem;color:#b2bec3}
.breadcrumb a{color:#27ae60}
/* AI Section */
.ai-features{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ai-card{background:linear-gradient(135deg,#f0fff4,#e8f8f0);border-radius:12px;padding:30px;text-align:center;border:1px solid #d4edda}
.ai-card .ai-icon{font-size:2.5rem;margin-bottom:14px}
.ai-card h3{color:#1a5c2e;margin-bottom:10px;font-size:1.1rem}
.ai-card p{color:#636e72;font-size:.9rem;line-height:1.6}
/* Community */
.community-topics{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.topic-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 15px rgba(0,0,0,.08);border-left:4px solid #27ae60}
.topic-card h3{color:#1a5c2e;margin-bottom:8px;font-size:1.05rem}
.topic-card p{color:#636e72;font-size:.9rem}
.topic-card .topic-stats{margin-top:10px;color:#b2bec3;font-size:.85rem}
/* Contact */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.contact-card{background:#fff;border-radius:12px;padding:30px;box-shadow:0 4px 15px rgba(0,0,0,.08)}
.contact-card h3{color:#1a5c2e;margin-bottom:16px;font-size:1.2rem}
.contact-card p{color:#636e72;margin-bottom:8px;font-size:.95rem}
/* Footer */
.site-footer{background:linear-gradient(135deg,#1a3c2a,#1a5c2e);color:rgba(255,255,255,.8);padding:50px 20px 0}
.footer-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:30px}
.footer-col h4{color:#2ecc71;margin-bottom:16px;font-size:1.05rem}
.footer-col p{font-size:.9rem;line-height:1.7;margin-bottom:6px}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:8px}
.footer-col ul a{color:rgba(255,255,255,.7);font-size:.9rem;transition:color .3s}
.footer-col ul a:hover{color:#2ecc71}
.footer-qr{display:flex;gap:16px}
.footer-qr div{text-align:center}
.footer-qr span{display:block;margin-top:6px;font-size:.8rem}
.footer-qr img{border-radius:8px}
.footer-bottom{text-align:center;padding:20px 0;margin-top:30px;border-top:1px solid rgba(255,255,255,.1);font-size:.85rem;color:rgba(255,255,255,.5)}
/* Utility */
.section-title-mt{margin-top:40px}
.contact-card img{display:block;margin:0 auto 10px}
/* Inner Page */
.page-hero{background:linear-gradient(135deg,rgba(26,92,46,.9),rgba(39,174,96,.8));color:#fff;padding:60px 20px;text-align:center}
.page-hero h1{font-size:2.2rem;margin-bottom:10px}
.page-hero p{font-size:1.05rem;opacity:.9}
/* Responsive */
@media(max-width:1024px){
  .video-grid,.expert-grid,.ai-features{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:repeat(2,1fr)}
  .howto-steps{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:#1a5c2e;padding:20px}
  .main-nav.show{display:block}
  .main-nav ul{flex-direction:column;gap:0}
  .main-nav a{display:block;padding:12px 20px;border-radius:0;border-bottom:1px solid rgba(255,255,255,.1)}
  .mobile-menu-btn{display:block}
  .search-box{display:none}
  .hero-banner{height:400px}
  .hero-content h1{font-size:1.8rem}
  .video-grid,.expert-grid,.review-grid,.community-topics,.contact-grid,.ai-features{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .section{padding:40px 16px}
  .brand-wall{gap:16px}
  .brand-wall span{padding:10px 18px;font-size:.9rem}
}