/* 暗网 - 植物视频社区 主样式表 */
*{margin:0;padding:0;box-sizing:border-box}
html,body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:#1f2d24;background:#f4f8f1;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:#1f7a3a;text-decoration:none;transition:color .25s}
a:hover{color:#d62828}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* 顶部 */
.topbar{background:#0f3d22;color:#cfe9d7;font-size:13px;padding:6px 0}
.topbar .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.topbar a{color:#a7d7b6;margin-left:14px}

/* Header */
.site-header{background:#fff;border-bottom:3px solid #1f7a3a;position:sticky;top:0;z-index:100;box-shadow:0 2px 8px rgba(0,0,0,.06)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;flex-wrap:wrap;gap:12px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{width:56px;height:56px;border-radius:8px}
.brand .name{font-size:24px;font-weight:800;color:#0f3d22;letter-spacing:1px}
.brand .name span{color:#d62828}
.brand .slogan{font-size:12px;color:#5b8064;display:block;margin-top:2px}

/* 搜索框 */
.search-box{display:flex;align-items:center;border:2px solid #1f7a3a;border-radius:24px;overflow:hidden;background:#f8fbf5}
.search-box input{border:0;outline:0;padding:8px 14px;width:240px;background:transparent;font-size:14px}
.search-box button{background:#1f7a3a;color:#fff;border:0;padding:8px 16px;cursor:pointer;font-weight:600}
.search-box button:hover{background:#d62828}

/* 导航 */
.main-nav{background:#1f7a3a}
.main-nav ul{list-style:none;display:flex;flex-wrap:wrap;max-width:1200px;margin:0 auto;padding:0 10px}
.main-nav li a{display:block;color:#fff;padding:14px 18px;font-weight:600;font-size:15px}
.main-nav li a:hover,.main-nav li a.active{background:#0f3d22;color:#ffe66d}

/* 面包屑 */
.breadcrumb{background:#eaf3e3;padding:10px 0;font-size:13px;color:#5b8064}
.breadcrumb a{color:#1f7a3a}
.breadcrumb .sep{margin:0 6px;color:#9ab8a3}

/* 首页 banner */
.hero{position:relative;background:#0f3d22 url('/assets/images/banner.png') center/cover no-repeat;color:#fff;padding:90px 0 110px;text-align:center}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,61,34,.55),rgba(15,61,34,.85))}
.hero .container{position:relative;z-index:2}
.hero h1{font-size:46px;font-weight:900;line-height:1.2;text-shadow:0 4px 14px rgba(0,0,0,.4);margin-bottom:14px}
.hero h1 span{color:#ffe66d}
.hero .lead{font-size:18px;max-width:820px;margin:0 auto 26px;color:#e7f3eb}
.hero .cta{display:inline-block;background:#d62828;color:#fff;padding:14px 32px;border-radius:30px;font-weight:700;font-size:16px}
.hero .cta:hover{background:#ffe66d;color:#0f3d22}

/* 通用区块 */
section{padding:60px 0}
section h2{font-size:30px;color:#0f3d22;font-weight:800;margin-bottom:8px;border-left:6px solid #d62828;padding-left:14px}
section .sub{color:#5b8064;margin-bottom:32px;font-size:15px}

/* 视频卡片网格 */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:22px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 18px rgba(15,61,34,.08);transition:transform .3s, box-shadow .3s;position:relative}
.video-card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(15,61,34,.18)}
.video-thumb{position:relative;background:#000;aspect-ratio:16/9;overflow:hidden}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb img{transform:scale(1.06)}
.play-btn{position:absolute;left:50%;top:50%;width:64px;height:64px;background:rgba(214,40,40,.92);border-radius:50%;display:flex;align-items:center;justify-content:center;transform:translate(-50%,-50%) scale(.7);opacity:0;transition:.3s;color:#fff;font-size:24px;border:3px solid #fff}
.video-card:hover .play-btn{opacity:1;transform:translate(-50%,-50%) scale(1)}
.video-meta{padding:14px 16px}
.video-meta h3{font-size:16px;color:#0f3d22;margin-bottom:6px;font-weight:700}
.video-meta .stats{font-size:12px;color:#7a9281}
.video-meta .stats span{margin-right:10px}
.tag{display:inline-block;background:#eaf3e3;color:#1f7a3a;font-size:12px;padding:2px 8px;border-radius:4px;margin-right:4px}

/* AI / 模块 */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.feature-card{background:#fff;border-radius:12px;padding:24px;border-top:4px solid #1f7a3a;box-shadow:0 2px 10px rgba(0,0,0,.05)}
.feature-card h3{color:#0f3d22;margin-bottom:10px;font-size:18px}
.feature-card p{color:#52685a;font-size:14px}

/* 专家 */
.experts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:24px}
.expert-card{background:#fff;border-radius:14px;overflow:hidden;text-align:center;padding-bottom:18px;box-shadow:0 4px 16px rgba(0,0,0,.06)}
.expert-card img{width:100%;aspect-ratio:1/1;object-fit:cover}
.expert-card h4{margin:14px 0 4px;color:#0f3d22;font-size:18px}
.expert-card .role{color:#d62828;font-size:13px;margin-bottom:10px}
.expert-card p{padding:0 14px;font-size:13px;color:#52685a}
.expert-card .actions{margin-top:12px}
.expert-card .actions a{display:inline-block;background:#1f7a3a;color:#fff;padding:6px 12px;border-radius:18px;font-size:12px;margin:0 4px}
.expert-card .actions a:hover{background:#d62828}

/* 评价 */
.reviews-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.review-card{background:#fff;border-left:4px solid #ffe66d;padding:20px;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.review-card .author{font-weight:700;color:#0f3d22;margin-bottom:4px}
.review-card .date{color:#9ab8a3;font-size:12px;margin-bottom:10px}
.review-card .stars{color:#f5a623;margin-bottom:8px}

/* FAQ */
.faq-list details{background:#fff;border:1px solid #d4e6cb;border-radius:8px;margin-bottom:10px;padding:14px 18px}
.faq-list summary{font-weight:700;color:#0f3d22;cursor:pointer;font-size:16px}
.faq-list summary::marker{color:#d62828}
.faq-list p{margin-top:10px;color:#52685a;font-size:14px}

/* 合作品牌墙 */
.partners-wall{background:#fff;border-radius:12px;padding:20px;text-align:center}
.partners-wall img{margin:0 auto;max-width:100%}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:30px}
.contact-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 14px rgba(0,0,0,.06)}
.contact-card h3{color:#0f3d22;margin-bottom:12px}
.contact-card p{margin-bottom:6px;color:#52685a}
.contact-card .qr{display:flex;gap:18px;flex-wrap:wrap;margin-top:14px}
.contact-card .qr div{text-align:center}
.contact-card .qr img{width:140px;height:140px}

/* Footer */
.site-footer{background:#0f3d22;color:#cfe9d7;padding:50px 0 20px;margin-top:40px}
.site-footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.site-footer h5{color:#ffe66d;margin-bottom:12px;font-size:15px}
.site-footer a{color:#a7d7b6;display:block;font-size:13px;margin-bottom:6px}
.site-footer a:hover{color:#fff}
.site-footer .brand-foot{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.site-footer .brand-foot img{width:48px;height:48px}
.site-footer .brand-foot strong{color:#fff;font-size:18px}
.site-footer .qr-foot{display:flex;gap:12px;margin-top:12px}
.site-footer .qr-foot div{text-align:center;color:#cfe9d7;font-size:12px}
.site-footer .qr-foot img{width:96px;height:96px;background:#fff;padding:4px;border-radius:6px}
.share-bar{display:flex;gap:10px;margin-top:10px}
.share-bar a{display:inline-block;background:#1f7a3a;color:#fff;width:34px;height:34px;line-height:34px;text-align:center;border-radius:50%;font-size:13px;margin:0}
.share-bar a:hover{background:#d62828}
.copyright{border-top:1px solid #245232;padding-top:18px;text-align:center;font-size:13px;color:#a7d7b6}

/* 通用列表 */
.article-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.article-list a.article{background:#fff;border-radius:10px;padding:18px;display:block;box-shadow:0 2px 8px rgba(0,0,0,.05);color:#1f2d24}
.article-list a.article:hover{box-shadow:0 8px 18px rgba(0,0,0,.1)}
.article-list h4{color:#0f3d22;margin-bottom:6px;font-size:16px}
.article-list .date{color:#9ab8a3;font-size:12px}

/* 内页通用 */
.page-hero{background:#1f7a3a;color:#fff;padding:50px 0;text-align:center}
.page-hero h1{font-size:36px;margin-bottom:8px}
.page-hero p{color:#cfe9d7}
.content-block{background:#fff;border-radius:12px;padding:30px;box-shadow:0 4px 14px rgba(0,0,0,.06);margin-bottom:24px}
.content-block h2{font-size:22px;color:#0f3d22;margin-bottom:14px;border-left:5px solid #d62828;padding-left:12px}
.content-block h3{font-size:17px;color:#1f7a3a;margin:14px 0 8px}
.content-block p{margin-bottom:12px;color:#3a4f43}

/* 响应式 */
@media (max-width:768px){
  .hero h1{font-size:30px}
  .hero{padding:60px 0 80px}
  .site-header .container{flex-direction:column;align-items:stretch}
  .search-box input{width:100%}
  .main-nav ul{justify-content:center}
  .main-nav li a{padding:10px 12px;font-size:14px}
  .site-footer .cols{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  section{padding:40px 0}
  section h2{font-size:24px}
}