/* 四虎视频 - 植物视频社区 全站样式 */
/* rnzwpi.cn 四虎视频品牌样式表 */
*{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;background:#f9faf8;line-height:1.8}
a{color:#2a7a4b;text-decoration:none;transition:color .3s}
a:hover{color:#1a5a35}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 15px}
/* 头部导航 */
.site-header{background:#1a3c2a;color:#fff;position:sticky;top:0;z-index:1000;box-shadow:0 2px 10px rgba(0,0,0,.15)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 0;flex-wrap:wrap}
.logo-area{display:flex;align-items:center;gap:10px}
.logo-area img{width:48px;height:48px;border-radius:8px}
.logo-area .site-name{font-size:1.4rem;color:#fff;white-space:nowrap;font-weight:bold}
.logo-area .site-name span{color:#7dcea0}
.main-nav{display:flex;gap:0;flex-wrap:wrap}
.main-nav a{color:#e0e0e0;padding:8px 14px;font-size:.9rem;border-radius:4px;transition:all .3s}
.main-nav a:hover,.main-nav a.active{background:#2a7a4b;color:#fff}
/* 搜索框 */
.search-bar{background:#15332a;padding:10px 0}
.search-bar form{display:flex;max-width:600px;margin:0 auto}
.search-bar input[type="text"]{flex:1;padding:10px 16px;border:2px solid #2a7a4b;border-radius:25px 0 0 25px;outline:none;font-size:.95rem;background:#fff}
.search-bar button{padding:10px 24px;background:#2a7a4b;color:#fff;border:none;border-radius:0 25px 25px 0;cursor:pointer;font-size:.95rem;transition:background .3s}
.search-bar button:hover{background:#1a5a35}
/* Banner */
.hero-banner{position:relative;overflow:hidden;min-height:420px;display:flex;align-items:center;justify-content:center;background:#1a3c2a}
.hero-banner img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;opacity:.55}
.hero-content{position:relative;z-index:2;text-align:center;color:#fff;padding:40px 20px;max-width:800px}
.hero-content h1{font-size:2.4rem;margin-bottom:15px;text-shadow:2px 2px 8px rgba(0,0,0,.5)}
.hero-content h2{font-size:2.4rem;margin-bottom:15px;text-shadow:2px 2px 8px rgba(0,0,0,.5)}
.hero-content p{font-size:1.15rem;line-height:1.9;text-shadow:1px 1px 4px rgba(0,0,0,.4)}
.hero-content .btn-primary{display:inline-block;margin-top:20px;padding:12px 36px;background:#2a7a4b;color:#fff;border-radius:30px;font-size:1.05rem;transition:all .3s;border:2px solid #7dcea0}
.hero-content .btn-primary:hover{background:#1a5a35;transform:translateY(-2px)}
/* 区块通用 */
.section{padding:50px 0}
.section-alt{background:#eef5ee}
.section-dark{background:#1a3c2a;color:#fff}
.section-title{text-align:center;margin-bottom:35px}
.section-title h2{font-size:1.8rem;color:#1a3c2a;position:relative;display:inline-block;padding-bottom:10px}
.section-title h2::after{content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60px;height:3px;background:#2a7a4b;border-radius:2px}
.section-dark .section-title h2{color:#7dcea0}
.section-dark .section-title h2::after{background:#7dcea0}
.section-title p{color:#666;margin-top:10px;font-size:1rem}
.section-dark .section-title p{color:#b0d4b8}
/* 视频卡片 */
.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;position:relative}
.video-card:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(0,0,0,.15)}
.video-thumb{position:relative;overflow:hidden;padding-top:56.25%}
.video-thumb img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.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(42,122,75,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:all .3s;cursor:pointer}
.video-card:hover .play-btn{opacity:1}
.play-btn::after{content:"";width:0;height:0;border-left:22px solid #fff;border-top:13px solid transparent;border-bottom:13px solid transparent;margin-left:4px}
.video-info{padding:15px}
.video-info h3{font-size:1.05rem;margin-bottom:8px;color:#1a3c2a;line-height:1.4}
.video-info p{font-size:.85rem;color:#888;line-height:1.5}
.video-meta{display:flex;gap:15px;margin-top:8px;font-size:.8rem;color:#999}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tag{display:inline-block;background:#eef5ee;color:#2a7a4b;padding:2px 10px;border-radius:12px;font-size:.75rem;margin-right:5px;margin-top:5px}
/* 专家卡片 */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:30px}
.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-card img{width:120px;height:120px;border-radius:50%;object-fit:cover;margin:0 auto 15px;border:4px solid #7dcea0}
.expert-card h3{font-size:1.1rem;color:#1a3c2a;margin-bottom:5px}
.expert-card .role{color:#2a7a4b;font-size:.9rem;margin-bottom:10px}
.expert-card p{font-size:.85rem;color:#666;line-height:1.6}
.expert-card .btn-sm{display:inline-block;margin-top:12px;padding:6px 20px;background:#2a7a4b;color:#fff;border-radius:20px;font-size:.85rem;transition:all .3s}
.expert-card .btn-sm:hover{background:#1a5a35}
/* 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,.06);overflow:hidden}
.faq-q{padding:18px 20px;font-weight:bold;cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:#1a3c2a;font-size:1rem;transition:background .3s}
.faq-q:hover{background:#f0f7f0}
.faq-q::after{content:"+";font-size:1.4rem;color:#2a7a4b;transition:transform .3s}
.faq-item.active .faq-q::after{transform:rotate(45deg)}
.faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:all .3s;color:#555;font-size:.9rem;line-height:1.8}
.faq-item.active .faq-a{padding:0 20px 18px;max-height:500px}
/* 用户评论 */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.review-card{background:#fff;border-radius:12px;padding:25px;box-shadow:0 3px 12px rgba(0,0,0,.06);position:relative}
.review-card::before{content:"\201C";font-size:3rem;color:#7dcea0;position:absolute;top:10px;left:15px;line-height:1}
.review-card .stars{color:#f5a623;margin-bottom:8px;font-size:1.1rem}
.review-card p{font-size:.9rem;color:#555;line-height:1.7;padding-top:15px}
.review-card .reviewer{margin-top:12px;font-size:.85rem;color:#1a3c2a;font-weight:bold}
/* 合作品牌 */
.brand-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.brand-wall img{height:50px;opacity:.6;transition:opacity .3s;filter:grayscale(50%)}
.brand-wall img:hover{opacity:1;filter:none}
/* 联系我们 */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:25px}
.contact-card{background:#fff;border-radius:12px;padding:25px;text-align:center;box-shadow:0 3px 12px rgba(0,0,0,.06)}
.contact-card h4{color:#1a3c2a;margin-bottom:10px;font-size:1.05rem}
.contact-card p{font-size:.9rem;color:#666}
.contact-card img{max-width:160px;margin:10px auto}
/* 社交分享 */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:20px;color:#fff;font-size:.85rem;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}
/* 页脚 */
.site-footer{background:#0f2a1c;color:#b0c4b0;padding:40px 0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:30px;margin-bottom:30px}
.footer-col h4{color:#7dcea0;margin-bottom:15px;font-size:1rem}
.footer-col p,.footer-col a{font-size:.85rem;color:#8fa88f;line-height:2}
.footer-col a:hover{color:#7dcea0}
.footer-col img{max-width:120px;margin-top:5px;border-radius:8px}
.footer-bottom{border-top:1px solid #1a3c2a;padding-top:20px;text-align:center;font-size:.8rem;color:#6a8a6a}
/* 面包屑 */
.breadcrumb{padding:12px 0;font-size:.85rem;color:#888}
.breadcrumb a{color:#2a7a4b}
.breadcrumb span{margin:0 6px;color:#ccc}
/* 内页通用 */
.page-hero{background:#1a3c2a;color:#fff;padding:60px 0;text-align:center}
.page-hero h1{font-size:2rem;margin-bottom:10px}
.page-hero p{font-size:1rem;color:#b0d4b8}
.content-area{padding:40px 0}
.content-area h2{color:#1a3c2a;font-size:1.5rem;margin:25px 0 15px}
.content-area h3{color:#2a7a4b;font-size:1.2rem;margin:20px 0 10px}
.content-area p{margin-bottom:15px;line-height:1.9;color:#444}
/* How-To */
.howto-steps{counter-reset:step}
.howto-step{position:relative;padding:20px 20px 20px 70px;background:#fff;border-radius:10px;margin-bottom:15px;box-shadow:0 2px 8px rgba(0,0,0,.06)}
.howto-step::before{counter-increment:step;content:counter(step);position:absolute;left:20px;top:20px;width:36px;height:36px;background:#2a7a4b;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:bold;font-size:1.1rem}
.howto-step h4{color:#1a3c2a;margin-bottom:5px}
/* MCP前端 */
.mcp-widget{background:#f0f7f0;border:2px dashed #7dcea0;border-radius:12px;padding:25px;text-align:center;margin:20px 0}
.mcp-widget h4{color:#1a3c2a;margin-bottom:10px}
.mcp-widget p{color:#666;font-size:.9rem}
/* 视频标签样式 */
.video-thumb video{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;z-index:0}
.video-thumb .video-poster{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;z-index:1;transition:transform .4s}
.video-card:hover .video-thumb .video-poster{transform:scale(1.05)}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem;z-index:3}
.video-author{font-size:.8rem;color:#888;margin-top:6px;line-height:1.5}
.video-author strong{color:#2a7a4b}
.video-author time{color:#999}
/* 交叉链接样式 */
.cross-link-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:15px}
.cross-link-item{display:block;background:#fff;border-radius:10px;padding:18px;box-shadow:0 2px 8px rgba(0,0,0,.06);transition:all .3s;text-decoration:none}
.cross-link-item:hover{transform:translateY(-3px);box-shadow:0 5px 15px rgba(0,0,0,.12)}
.cross-link-item strong{display:block;color:#1a3c2a;margin-bottom:5px;font-size:1rem}
.cross-link-item span{font-size:.85rem;color:#888;line-height:1.5}
/* 干扰标签隐藏 */
.noise-wrap{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;padding:0;margin:-1px}
/* 响应式 */
@media(max-width:768px){
  .header-inner{flex-direction:column;gap:10px}
  .main-nav{justify-content:center}
  .main-nav a{padding:6px 10px;font-size:.8rem}
  .hero-content h2{font-size:1.6rem}
  .hero-banner{min-height:300px}
  .video-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:30px 0}
  .section-title h2{font-size:1.4rem}
}
@media(max-width:480px){
  .hero-content h2{font-size:1.3rem}
  .main-nav a{padding:5px 8px;font-size:.75rem}
  .logo-area .site-name{font-size:1.1rem}
}
/* 页脚底部链接 */
.footer-bottom a{color:#6a8a6a;margin:0 5px;transition:color .3s}
.footer-bottom a:hover{color:#7dcea0}