/* ===== 青柠视频 - 植物视频社区 原创样式表 ===== */
:root{--forest:#1a3a2a;--oak:#c8a96e;--leaf:#4caf50;--dark:#0d1f17;--card:#162b20;--text:#e8e0d4;--muted:#8fa89a;--gold:#d4a843;--accent:#2e7d32;--radius:12px}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;background:var(--dark);color:var(--text);line-height:1.7;overflow-x:hidden}
a{color:var(--oak);text-decoration:none;transition:color .3s}
a:hover{color:var(--leaf)}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
/* Nav */
.site-nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(13,31,23,.95);backdrop-filter:blur(12px);border-bottom:1px solid rgba(200,169,110,.15);padding:0 24px;height:64px;display:flex;align-items:center}
.nav-inner{max-width:1200px;margin:0 auto;width:100%;display:flex;align-items:center;justify-content:space-between}
.nav-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.2rem;color:var(--oak)}
.nav-brand img{width:40px;height:40px;border-radius:8px;object-fit:cover}
.nav-links{display:flex;list-style:none;gap:6px}
.nav-links a{padding:8px 14px;border-radius:8px;font-size:.9rem;color:var(--text);transition:all .3s}
.nav-links a:hover,.nav-links a.active{background:rgba(76,175,80,.15);color:var(--leaf)}
.nav-hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.nav-hamburger span{width:24px;height:2px;background:var(--oak);border-radius:2px;transition:all .3s}
/* Search */
.search-bar{margin-top:64px;background:var(--forest);padding:12px 24px;border-bottom:1px solid rgba(200,169,110,.1)}
.search-wrap{max-width:600px;margin:0 auto;display:flex;gap:8px}
.search-wrap input{flex:1;padding:10px 16px;border:1px solid rgba(200,169,110,.25);border-radius:var(--radius);background:var(--card);color:var(--text);font-size:.92rem;outline:none;transition:border-color .3s}
.search-wrap input:focus{border-color:var(--leaf)}
.search-wrap button{padding:10px 24px;background:linear-gradient(135deg,var(--leaf),var(--accent));color:#fff;border:none;border-radius:var(--radius);cursor:pointer;font-size:.92rem;transition:opacity .3s}
.search-wrap button:hover{opacity:.85}
/* Hero Banner */
.hero-banner{position:relative;min-height:520px;display:flex;align-items:center;justify-content:center;text-align:center;overflow:hidden;background:var(--dark)}
.hero-banner .bg-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.45}
.hero-banner .overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,31,23,.3) 0%,rgba(13,31,23,.85) 100%)}
.hero-content{position:relative;z-index:2;max-width:800px;padding:40px 20px}
.hero-content h1{font-size:2.8rem;color:var(--oak);margin-bottom:16px;line-height:1.3}
.hero-content h1 em{font-style:normal;color:var(--leaf)}
.hero-content p{font-size:1.1rem;color:var(--muted);line-height:1.8;margin-bottom:24px}
.hero-content .hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px}
.hero-content .hero-tags span{padding:6px 16px;background:rgba(76,175,80,.12);border:1px solid rgba(76,175,80,.3);border-radius:20px;font-size:.85rem;color:var(--leaf)}
/* Section */
.section{padding:60px 0}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:1.9rem;color:var(--oak);margin-bottom:10px}
.section-title p{color:var(--muted);font-size:1rem}
/* Video Cards */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.video-card{position:relative;border-radius:var(--radius);overflow:hidden;background:var(--card);box-shadow:0 4px 20px rgba(0,0,0,.2);transition:transform .35s,box-shadow .35s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 36px rgba(0,0,0,.3)}
.video-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.video-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .thumb img{transform:scale(1.08)}
.video-card .play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(13,31,23,.5);opacity:0;transition:opacity .35s}
.video-card:hover .play-btn{opacity:1}
.video-card .play-btn svg{width:56px;height:56px;fill:var(--oak);filter:drop-shadow(0 2px 8px rgba(0,0,0,.4))}
.video-card .card-info{padding:16px}
.video-card .card-info h3{font-size:1rem;color:var(--text);margin-bottom:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.video-card .card-info .meta{display:flex;gap:12px;font-size:.82rem;color:var(--muted)}
.video-card .card-info .tags{margin-top:8px;display:flex;gap:6px;flex-wrap:wrap}
.video-card .card-info .tags span{padding:2px 10px;background:rgba(76,175,80,.1);border-radius:12px;font-size:.75rem;color:var(--leaf)}
/* Service Grid */
.service-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.service-item{background:var(--card);border-radius:var(--radius);padding:32px 24px;text-align:center;border:1px solid rgba(200,169,110,.1);transition:all .35s}
.service-item:hover{border-color:var(--oak);transform:translateY(-4px)}
.service-item .icon{font-size:2.5rem;margin-bottom:16px}
.service-item h3{color:var(--oak);margin-bottom:10px;font-size:1.1rem}
.service-item p{color:var(--muted);font-size:.9rem;line-height:1.6}
/* TikTok Scroll */
.tiktok-scroll{display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;padding:16px 0;-webkit-overflow-scrolling:touch}
.tiktok-scroll::-webkit-scrollbar{height:6px}
.tiktok-scroll::-webkit-scrollbar-thumb{background:var(--oak);border-radius:3px}
.tiktok-card{flex:0 0 220px;scroll-snap-align:start;border-radius:var(--radius);overflow:hidden;position:relative;aspect-ratio:9/16;background:var(--card);cursor:pointer}
.tiktok-card img{width:100%;height:100%;object-fit:cover}
.tiktok-card .tiktok-overlay{position:absolute;bottom:0;left:0;right:0;padding:16px;background:linear-gradient(transparent,rgba(13,31,23,.9));color:var(--text);font-size:.88rem}
/* AI Section */
.ai-flex{display:flex;gap:40px;align-items:center}
.ai-flex .ai-img{flex:0 0 48%;border-radius:var(--radius);overflow:hidden}
.ai-flex .ai-text{flex:1}
.ai-flex .ai-text h3{color:var(--oak);font-size:1.3rem;margin-bottom:16px}
.ai-flex .ai-text p{color:var(--muted);line-height:1.8;margin-bottom:12px}
.ai-flex .ai-text ul{list-style:none;padding:0}
.ai-flex .ai-text ul li{padding:6px 0;color:var(--text);font-size:.92rem}
.ai-flex .ai-text ul li::before{content:"\2714";color:var(--leaf);margin-right:8px}
/* Community */
.community-banner{position:relative;border-radius:var(--radius);overflow:hidden;min-height:360px;display:flex;align-items:center}
.community-banner img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.35}
.community-banner .comm-content{position:relative;z-index:2;padding:48px;max-width:600px}
.community-banner .comm-content h3{color:var(--oak);font-size:1.6rem;margin-bottom:16px}
.community-banner .comm-content p{color:var(--text);line-height:1.8;margin-bottom:20px}
.comm-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-top:24px}
.comm-feat{background:rgba(22,43,32,.8);border:1px solid rgba(200,169,110,.15);border-radius:var(--radius);padding:20px;text-align:center}
.comm-feat h4{color:var(--oak);margin-bottom:8px}
.comm-feat p{color:var(--muted);font-size:.85rem}
/* Expert */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.expert-card{background:var(--card);border-radius:var(--radius);overflow:hidden;border:1px solid rgba(200,169,110,.1);transition:all .35s}
.expert-card:hover{border-color:var(--oak)}
.expert-card .expert-img{width:100%;aspect-ratio:1;object-fit:cover}
.expert-card .expert-info{padding:20px}
.expert-card .expert-info h3{color:var(--oak);margin-bottom:4px}
.expert-card .expert-info .role{color:var(--leaf);font-size:.85rem;margin-bottom:10px}
.expert-card .expert-info p{color:var(--muted);font-size:.88rem;line-height:1.6;margin-bottom:12px}
.expert-card .expert-btns{display:flex;gap:8px;padding:0 20px 20px}
.expert-card .expert-btns a{padding:8px 16px;border-radius:8px;font-size:.82rem;border:1px solid var(--oak);color:var(--oak);transition:all .3s}
.expert-card .expert-btns a:hover{background:var(--oak);color:var(--dark)}
/* Partners */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:24px;padding:20px 0}
.partner-wall .partner{background:var(--card);border-radius:var(--radius);padding:20px 32px;border:1px solid rgba(200,169,110,.1);color:var(--muted);font-size:.95rem;transition:all .3s}
.partner-wall .partner:hover{border-color:var(--oak);color:var(--oak)}
/* How-to */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:24px;counter-reset:step}
.howto-step{background:var(--card);border-radius:var(--radius);padding:28px 24px;border:1px solid rgba(200,169,110,.1);counter-increment:step;position:relative}
.howto-step::before{content:counter(step);position:absolute;top:16px;right:16px;font-size:2.5rem;font-weight:800;color:rgba(200,169,110,.1)}
.howto-step h4{color:var(--oak);margin-bottom:10px;font-size:1.05rem}
.howto-step p{color:var(--muted);font-size:.88rem;line-height:1.6}
/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid rgba(200,169,110,.1);padding:0}
.faq-q{padding:20px 0;cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:var(--text);font-size:1rem;font-weight:500}
.faq-q::after{content:"+";font-size:1.4rem;color:var(--oak);transition:transform .3s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s;color:var(--muted);font-size:.92rem;line-height:1.7}
.faq-item.open .faq-a{max-height:300px;padding-bottom:20px}
/* Reviews */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.review-card{background:var(--card);border-radius:var(--radius);padding:24px;border:1px solid rgba(200,169,110,.1)}
.review-card .stars{color:var(--gold);margin-bottom:10px;font-size:1.1rem}
.review-card p{color:var(--muted);font-size:.9rem;line-height:1.7;margin-bottom:12px;font-style:italic}
.review-card .reviewer{color:var(--oak);font-size:.85rem;font-weight:600}
/* Share */
.share-bar{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-btn{padding:10px 20px;border-radius:8px;border:1px solid rgba(200,169,110,.2);background:var(--card);color:var(--text);cursor:pointer;font-size:.88rem;transition:all .3s}
.share-btn:hover{border-color:var(--oak);color:var(--oak)}
.share-btn.wechat:hover{border-color:#07c160;color:#07c160}
.share-btn.weibo:hover{border-color:#e6162d;color:#e6162d}
/* Footer */
.site-footer{background:var(--forest);border-top:1px solid rgba(200,169,110,.15);padding:48px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;margin-bottom:32px}
.footer-col h4{color:var(--oak);margin-bottom:16px;font-size:1rem}
.footer-col a,.footer-col p{display:block;color:var(--muted);font-size:.88rem;line-height:2;transition:color .3s}
.footer-col a:hover{color:var(--leaf)}
.footer-qr{display:flex;gap:24px;justify-content:center;padding:24px 0;border-top:1px solid rgba(200,169,110,.1)}
.footer-qr .qr-item{text-align:center}
.footer-qr .qr-item img{width:120px;border-radius:8px;margin-bottom:6px}
.footer-qr .qr-item span{font-size:.82rem;color:var(--muted)}
.footer-bottom{text-align:center;padding:20px 0;border-top:1px solid rgba(200,169,110,.1);font-size:.82rem;color:var(--muted)}
/* Video Modal */
.video-modal{display:none;position:fixed;inset:0;z-index:9999;background:rgba(13,31,23,.9);align-items:center;justify-content:center}
.video-modal.active{display:flex}
.video-modal .modal-close{position:absolute;top:20px;right:24px;font-size:2rem;color:var(--oak);cursor:pointer;z-index:10000}
.video-modal .modal-body{width:90%;max-width:800px;aspect-ratio:16/9;background:#000;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:1.2rem}
/* Breadcrumb */
.breadcrumb{padding:16px 0;font-size:.85rem;color:var(--muted)}
.breadcrumb a{color:var(--oak)}
.breadcrumb span{margin:0 8px;color:var(--muted)}
/* Page Header */
.page-header{background:var(--forest);padding:48px 0;text-align:center;border-bottom:1px solid rgba(200,169,110,.1)}
.page-header h1{font-size:2rem;color:var(--oak);margin-bottom:10px}
.page-header p{color:var(--muted);font-size:1rem}
/* Content */
.content-wrap{padding:40px 0}
.content-wrap h2{color:var(--oak);font-size:1.5rem;margin:32px 0 16px}
.content-wrap h3{color:var(--leaf);font-size:1.2rem;margin:24px 0 12px}
.content-wrap p{color:var(--muted);line-height:1.8;margin-bottom:16px}
.content-wrap ul,.content-wrap ol{padding-left:24px;margin-bottom:16px}
.content-wrap li{color:var(--muted);line-height:1.8;margin-bottom:4px}
/* Contact Grid */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:24px}
.contact-item{background:var(--card);border-radius:var(--radius);padding:28px;text-align:center;border:1px solid rgba(200,169,110,.1)}
.contact-item h3{color:var(--oak);margin-bottom:10px}
.contact-item p{color:var(--muted);font-size:.9rem;line-height:1.7}
/* Responsive */
@media(max-width:768px){
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:rgba(13,31,23,.98);flex-direction:column;padding:16px 24px}
  .nav-links.open{display:flex}
  .nav-hamburger{display:flex}
  .hero-content h1{font-size:1.8rem}
  .ai-flex{flex-direction:column}
  .ai-flex .ai-img{flex:none;width:100%}
  .video-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .expert-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
  .hero-banner{min-height:400px}
  .section{padding:40px 0}
  .footer-grid{grid-template-columns:1fr}
}