/* ========== 寸止挑战植物视频社区 - 全站样式 ========== */
/* 品牌色: #1DB954(主绿) #155724(深绿) #f8f9fa(浅灰背景) */

/* Reset & Base */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:#333;background:#fff;line-height:1.8;overflow-x:hidden}
a{color:#1DB954;text-decoration:none;transition:color .3s}
a:hover{color:#155724}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3;color:#155724}

/* Container */
.container{max-width:1200px;margin:0 auto;padding:0 15px}

/* ========== Header / 导航 ========== */
.site-header{background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.08);position:sticky;top:0;z-index:999}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 0;flex-wrap:wrap}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{width:48px;height:48px;border-radius:8px}
.logo-wrap .brand-name{font-size:1.5rem;font-weight:800;color:#1DB954}
.logo-wrap .brand-sub{font-size:.75rem;color:#666}

/* Nav */
.main-nav ul{display:flex;gap:6px;flex-wrap:wrap}
.main-nav a{display:block;padding:8px 14px;border-radius:6px;font-size:.95rem;color:#333;font-weight:500;transition:all .3s}
.main-nav a:hover,.main-nav a.active{background:#1DB954;color:#fff}

/* Search Bar */
.search-bar{width:100%;background:#f0faf4;padding:10px 0}
.search-bar form{display:flex;max-width:600px;margin:0 auto}
.search-bar input{flex:1;padding:10px 16px;border:2px solid #1DB954;border-radius:25px 0 0 25px;outline:none;font-size:.95rem}
.search-bar button{padding:10px 24px;background:#1DB954;color:#fff;border:2px solid #1DB954;border-radius:0 25px 25px 0;cursor:pointer;font-size:.95rem;font-weight:600;transition:background .3s}
.search-bar button:hover{background:#155724;border-color:#155724}

/* ========== Banner ========== */
.banner-section{position:relative;height:520px;overflow:hidden;background:#000}
.banner-section img{width:100%;height:100%;object-fit:cover;opacity:.7}
.banner-overlay{position:absolute;top:0;left:0;right:0;bottom:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:20px;background:linear-gradient(180deg,rgba(0,0,0,.3),rgba(0,0,0,.6))}
.banner-overlay h1{font-size:2.8rem;color:#fff;text-shadow:2px 2px 8px rgba(0,0,0,.5);margin-bottom:12px}
.banner-overlay h1 span{color:#1DB954}
.banner-overlay p{font-size:1.15rem;color:#e0e0e0;max-width:700px;line-height:1.8}
.banner-overlay .btn-group{margin-top:20px;display:flex;gap:15px;flex-wrap:wrap;justify-content:center}
.btn-primary{display:inline-block;padding:12px 32px;background:#1DB954;color:#fff;border-radius:30px;font-weight:600;font-size:1rem;transition:all .3s;border:none;cursor:pointer}
.btn-primary:hover{background:#155724;transform:translateY(-2px);box-shadow:0 4px 15px rgba(29,185,84,.4)}
.btn-outline{display:inline-block;padding:12px 32px;border:2px solid #fff;color:#fff;border-radius:30px;font-weight:600;font-size:1rem;transition:all .3s}
.btn-outline:hover{background:#fff;color:#1DB954}

/* ========== Section Common ========== */
.section{padding:60px 0}
.section-alt{background:#f8f9fa}
.section-green{background:linear-gradient(135deg,#e8f5e9,#f1f8e9)}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:2rem;color:#155724;margin-bottom:8px}
.section-title h2 span{color:#1DB954}
.section-title p{color:#666;font-size:1rem;max-width:600px;margin:0 auto}
.section-title .tag{display:inline-block;background:#e8f5e9;color:#1DB954;padding:4px 14px;border-radius:20px;font-size:.85rem;margin-bottom:10px}

/* ========== Video Card Grid ========== */
.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 20px rgba(0,0,0,.08);transition:all .3s;position:relative}
.video-card:hover{transform:translateY(-6px);box-shadow:0 8px 30px rgba(29,185,84,.15)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#000}
.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(1.05)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;background:rgba(29,185,84,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .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}
.video-info{padding:16px}
.video-info h3{font-size:1.05rem;color:#333;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-info .meta{display:flex;gap:12px;color:#999;font-size:.8rem;flex-wrap:wrap}
.video-info .meta span{display:flex;align-items:center;gap:3px}
.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}
.video-tag{position:absolute;top:8px;left:8px;background:#1DB954;color:#fff;padding:2px 10px;border-radius:4px;font-size:.75rem;font-weight:600}

/* ========== Feature Cards ========== */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.feature-card{background:#fff;border-radius:12px;padding:30px 24px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:all .3s;border:1px solid #e8f5e9}
.feature-card:hover{transform:translateY(-4px);border-color:#1DB954;box-shadow:0 8px 30px rgba(29,185,84,.12)}
.feature-card .icon{font-size:2.5rem;margin-bottom:16px}
.feature-card h4{font-size:1.1rem;color:#155724;margin-bottom:10px}
.feature-card p{color:#666;font-size:.9rem;line-height:1.7}

/* ========== Expert / Team ========== */
.team-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.team-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,.06);text-align:center;transition:all .3s}
.team-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(29,185,84,.12)}
.team-card .avatar{width:100%;height:200px;object-fit:cover}
.team-card .info{padding:20px}
.team-card h4{font-size:1.1rem;color:#155724;margin-bottom:4px}
.team-card .role{color:#1DB954;font-size:.85rem;margin-bottom:8px}
.team-card p{color:#666;font-size:.85rem;line-height:1.6}
.team-card .btn-sm{display:inline-block;margin-top:10px;padding:6px 18px;background:#e8f5e9;color:#1DB954;border-radius:20px;font-size:.85rem;transition:all .3s}
.team-card .btn-sm:hover{background:#1DB954;color:#fff}

/* ========== FAQ ========== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid #e8f5e9;border-radius:10px;margin-bottom:12px;overflow:hidden;transition:all .3s}
.faq-item.active{border-color:#1DB954}
.faq-q{padding:16px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:#155724;font-size:1rem;background:#f8fdf9;transition:background .3s}
.faq-q:hover{background:#e8f5e9}
.faq-q .arrow{transition:transform .3s;font-size:1.2rem;color:#1DB954}
.faq-item.active .faq-q .arrow{transform:rotate(180deg)}
.faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:all .4s ease;color:#555;font-size:.95rem;line-height:1.8}
.faq-item.active .faq-a{padding:0 20px 16px;max-height:500px}

/* ========== Reviews ========== */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.review-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 20px rgba(0,0,0,.06);border-left:4px solid #1DB954}
.review-card .stars{color:#f5a623;font-size:1.1rem;margin-bottom:8px}
.review-card blockquote{color:#555;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 .name{font-weight:600;color:#333;font-size:.9rem}
.review-card .reviewer .date{color:#999;font-size:.8rem}

/* ========== Contact ========== */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:30px}
.contact-card{background:#fff;border-radius:12px;padding:30px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.contact-card h4{color:#155724;margin-bottom:16px;font-size:1.1rem}
.contact-card p{color:#666;font-size:.9rem;margin-bottom:8px;line-height:1.7}
.contact-card .qr-img{width:180px;margin:10px auto;border-radius:8px}

/* ========== Share Buttons ========== */
.share-bar{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:25px;font-size:.85rem;font-weight:600;color:#fff;transition:all .3s;cursor:pointer}
.share-btn:hover{transform:translateY(-2px);opacity:.9}
.share-wechat{background:#07c160}
.share-weibo{background:#e6162d}
.share-douyin{background:#000}
.share-bilibili{background:#fb7299}

/* ========== Partner Logos ========== */
.partner-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center}
.partner-wall .partner-item{background:#fff;border-radius:10px;padding:16px 24px;box-shadow:0 2px 10px rgba(0,0,0,.05);font-weight:600;color:#155724;font-size:.95rem;border:1px solid #e8f5e9;transition:all .3s}
.partner-wall .partner-item:hover{border-color:#1DB954;box-shadow:0 4px 15px rgba(29,185,84,.1)}

/* ========== Footer ========== */
.site-footer{background:#155724;color:#e0e0e0;padding:40px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:30px;padding-bottom:30px}
.footer-col h5{color:#1DB954;font-size:1rem;margin-bottom:14px}
.footer-col p,.footer-col a{color:#ccc;font-size:.85rem;line-height:2}
.footer-col a:hover{color:#1DB954}
.footer-col .qr-small{width:120px;border-radius:6px;margin-top:8px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:16px 0;text-align:center;font-size:.85rem;color:#aaa}
.footer-bottom a{color:#1DB954}

/* ========== Breadcrumb ========== */
.breadcrumb{padding:12px 0;font-size:.85rem;color:#999}
.breadcrumb a{color:#1DB954}
.breadcrumb span{margin:0 6px;color:#ccc}

/* ========== Responsive ========== */
@media(max-width:768px){
  .header-inner{flex-direction:column;gap:10px}
  .main-nav ul{justify-content:center}
  .banner-section{height:360px}
  .banner-overlay h1{font-size:1.8rem}
  .banner-overlay p{font-size:.95rem}
  .section{padding:40px 0}
  .section-title h2{font-size:1.5rem}
  .video-grid,.feature-grid,.team-grid,.review-grid,.contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
  .banner-section{height:280px}
  .banner-overlay h1{font-size:1.4rem}
  .main-nav a{padding:6px 10px;font-size:.85rem}
  .footer-grid{grid-template-columns:1fr}
}

/* ========== Lazy Load ========== */
img[loading="lazy"]{opacity:0;transition:opacity .5s}
img.loaded,img[loading="lazy"]{opacity:1}

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