/* =============================================
   抖阴 - 植物视频社区 主样式 v1.0
   主色: #1B5E20 (森林绿) / #0A1F0D (深墨绿) / #4CAF50 (翠绿)
   ============================================= */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --c-primary:#1B5E20;--c-secondary:#4CAF50;--c-accent:#81C784;
  --c-gold:#FFD54F;--c-dark:#0A1F0D;--c-darker:#051208;
  --c-text:#E8F5E9;--c-muted:#A5D6A7;--c-card:#122A15;
  --c-section:#0E2211;--c-border:rgba(76,175,80,0.25);
  --grad:linear-gradient(135deg,#1B5E20,#2E7D32);
  --grad-dark:linear-gradient(180deg,#0A1F0D,#051208);
  --shadow:0 4px 20px rgba(27,94,32,0.3);
  --radius:12px;--transition:0.3s ease;
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'PingFang SC','Microsoft YaHei',sans-serif;background:var(--c-darker);color:var(--c-text);line-height:1.7;overflow-x:hidden}
a{color:var(--c-secondary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--c-accent)}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
button{cursor:pointer;border:none;outline:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* 顶部公告 */
.topbar{background:var(--grad);color:#fff;text-align:center;padding:8px 16px;font-size:13px;font-weight:500}
.topbar a{color:#fff;text-decoration:underline}

/* 导航 */
.site-hd{position:sticky;top:0;z-index:1000;background:rgba(10,31,13,0.97);backdrop-filter:blur(10px);border-bottom:1px solid var(--c-border);box-shadow:0 2px 16px rgba(0,0,0,0.5)}
.hd-inner{display:flex;align-items:center;justify-content:space-between;height:62px;gap:14px}
.logo-link{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}
.logo-link img{height:38px;width:38px;border-radius:8px;object-fit:contain}
.logo-link span{font-size:20px;font-weight:700;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:2px;flex-wrap:nowrap}
.main-nav a{color:var(--c-text);font-size:14px;padding:6px 10px;border-radius:6px;transition:all var(--transition);white-space:nowrap;font-weight:500}
.main-nav a:hover,.main-nav a.active{color:var(--c-secondary);background:rgba(76,175,80,0.12)}
.hd-search{display:flex;align-items:center;background:rgba(255,255,255,0.06);border:1px solid var(--c-border);border-radius:24px;overflow:hidden;min-width:160px;max-width:200px}
.hd-search:focus-within{border-color:var(--c-secondary)}
.hd-search input{background:transparent;border:none;outline:none;color:var(--c-text);padding:7px 12px;font-size:13px;width:100%}
.hd-search input::placeholder{color:var(--c-muted)}
.hd-search button{background:var(--grad);color:#fff;padding:7px 14px;font-size:13px;border-radius:0 24px 24px 0;white-space:nowrap}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:transparent;padding:4px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--c-text);border-radius:2px;transition:all var(--transition)}

/* 搜索栏 */
.search-sec{background:var(--c-section);border-bottom:1px solid var(--c-border);padding:12px 0}
.search-inner{display:flex;max-width:680px;margin:0 auto;background:rgba(255,255,255,0.05);border:1px solid var(--c-border);border-radius:32px;overflow:hidden}
.search-inner:focus-within{border-color:var(--c-secondary);box-shadow:var(--shadow)}
.search-inner input{flex:1;background:transparent;border:none;outline:none;color:var(--c-text);padding:12px 20px;font-size:15px}
.search-inner input::placeholder{color:var(--c-muted)}
.search-inner button{background:var(--grad);color:#fff;padding:12px 28px;font-size:15px;font-weight:600;border-radius:0 32px 32px 0;white-space:nowrap}

/* Hero */
.hero{position:relative;min-height:480px;display:flex;align-items:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(0.45)}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,31,13,0.9) 0%,rgba(10,31,13,0.4) 60%,transparent 100%)}
.hero-content{position:relative;z-index:2;max-width:600px;padding:50px 0}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(76,175,80,0.2);border:1px solid var(--c-secondary);color:var(--c-secondary);font-size:12px;font-weight:600;padding:4px 14px;border-radius:20px;margin-bottom:14px}
.hero-title{font-size:clamp(28px,5vw,52px);font-weight:800;line-height:1.2;margin-bottom:14px}
.hero-title span{background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{font-size:15px;color:rgba(255,255,255,0.8);margin-bottom:24px;line-height:1.8}
.hero-stats{display:flex;gap:28px;margin-bottom:28px}
.hero-stat{text-align:center}
.hero-stat-num{font-size:24px;font-weight:800;color:var(--c-secondary)}
.hero-stat-label{font-size:12px;color:var(--c-muted)}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 26px;border-radius:28px;font-size:15px;font-weight:600;transition:all var(--transition);text-decoration:none;border:none}
.btn-primary{background:var(--grad);color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(27,94,32,0.45);color:#fff}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,0.4)}
.btn-outline:hover{border-color:var(--c-secondary);color:var(--c-secondary)}
.btn-sm{padding:8px 16px;font-size:13px}

/* 区块 */
.section{padding:56px 0}
.section-alt{background:var(--c-section)}
.section-dark{background:var(--c-darker)}
.sec-hd{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;flex-wrap:wrap;gap:12px}
.sec-title{font-size:clamp(18px,3vw,24px);font-weight:700;display:flex;align-items:center;gap:10px}
.sec-title::before{content:'';display:inline-block;width:4px;height:20px;background:var(--grad);border-radius:2px;flex-shrink:0}
.sec-more{font-size:13px;color:var(--c-secondary);border:1px solid var(--c-border);padding:5px 14px;border-radius:20px;transition:all var(--transition);white-space:nowrap}
.sec-more:hover{background:var(--c-secondary);color:#fff}

/* 视频卡片 */
.vid-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px}
.vid-card{background:var(--c-card);border-radius:var(--radius);overflow:hidden;border:1px solid var(--c-border);transition:all var(--transition);cursor:pointer}
.vid-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--c-secondary)}
.vid-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#071a0a}
.vid-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s}
.vid-card:hover .vid-thumb img{transform:scale(1.05)}
.vid-play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,0);transition:background var(--transition)}
.vid-card:hover .vid-play{background:rgba(0,0,0,0.4)}
.play-ico{width:50px;height:50px;background:var(--grad);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transform:scale(0.7);transition:all var(--transition);box-shadow:0 4px 16px rgba(27,94,32,0.5)}
.vid-card:hover .play-ico{opacity:1;transform:scale(1)}
.play-ico::after{content:'';border-left:16px solid #fff;border-top:10px solid transparent;border-bottom:10px solid transparent;margin-left:3px}
.vid-tag{position:absolute;top:8px;left:8px;background:var(--grad);color:#fff;font-size:11px;font-weight:600;padding:3px 8px;border-radius:4px}
.vid-dur{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,0.75);color:#fff;font-size:12px;padding:2px 6px;border-radius:4px}
.vid-info{padding:12px 14px}
.vid-title{font-size:14px;font-weight:600;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.5}
.vid-meta{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--c-muted);flex-wrap:wrap;gap:4px}
.vid-author{display:flex;align-items:center;gap:6px}
.author-av{width:22px;height:22px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:10px;color:#fff;font-weight:700;flex-shrink:0}
.vid-stats{display:flex;gap:8px}

/* 专家 */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:22px}
.expert-card{background:var(--c-card);border-radius:16px;padding:26px 18px 18px;border:1px solid var(--c-border);text-align:center;transition:all var(--transition)}
.expert-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--c-secondary)}
.expert-av{width:72px;height:72px;border-radius:50%;background:var(--grad);margin:0 auto 12px;display:flex;align-items:center;justify-content:center;font-size:26px;font-weight:800;color:#fff;border:3px solid var(--c-secondary)}
.expert-name{font-size:17px;font-weight:700;margin-bottom:4px}
.expert-role{font-size:13px;color:var(--c-secondary);margin-bottom:10px;font-weight:600}
.expert-desc{font-size:13px;color:var(--c-muted);line-height:1.6;margin-bottom:12px;text-align:left}
.expert-tags{display:flex;flex-wrap:wrap;gap:5px;justify-content:center;margin-bottom:12px}
.expert-tag{background:rgba(76,175,80,0.1);border:1px solid var(--c-border);color:var(--c-accent);font-size:11px;padding:3px 9px;border-radius:12px}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius);margin-bottom:10px;overflow:hidden}
.faq-q{display:flex;align-items:center;justify-content:space-between;padding:15px 18px;cursor:pointer;font-size:15px;font-weight:600;user-select:none;gap:12px}
.faq-q::after{content:'+';font-size:20px;color:var(--c-secondary);transition:transform var(--transition);flex-shrink:0}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 0.4s,padding 0.3s;font-size:14px;color:var(--c-muted);line-height:1.75;padding:0 18px}
.faq-item.open .faq-a{max-height:300px;padding:0 18px 16px}

/* 评价 */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.review-card{background:var(--c-card);border-radius:var(--radius);padding:18px;border:1px solid var(--c-border)}
.review-stars{color:var(--c-gold);font-size:15px;margin-bottom:8px}
.review-text{font-size:14px;color:var(--c-muted);line-height:1.7;margin-bottom:12px;font-style:italic}
.review-user{display:flex;align-items:center;gap:10px}
.review-av{width:34px;height:34px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:#fff;flex-shrink:0}
.review-name{font-size:14px;font-weight:600}
.review-date{font-size:12px;color:var(--c-muted)}

/* AI功能 */
.ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.ai-card{background:var(--c-card);border-radius:16px;padding:26px 20px;border:1px solid var(--c-border);text-align:center;transition:all var(--transition);position:relative;overflow:hidden}
.ai-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad)}
.ai-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.ai-ico{font-size:38px;margin-bottom:12px}
.ai-t{font-size:16px;font-weight:700;margin-bottom:8px}
.ai-d{font-size:13px;color:var(--c-muted);line-height:1.7}

/* How-To */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.step-item{text-align:center;position:relative}
.step-num{width:56px;height:56px;border-radius:50%;background:var(--grad);color:#fff;font-size:20px;font-weight:800;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;box-shadow:var(--shadow)}
.step-t{font-size:14px;font-weight:700;margin-bottom:6px}
.step-d{font-size:13px;color:var(--c-muted);line-height:1.6}

/* 统计 */
.stats-bar{background:var(--grad);padding:36px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;text-align:center}
.stat-num{font-size:32px;font-weight:800;color:#fff}
.stat-label{font-size:13px;color:rgba(255,255,255,0.85);margin-top:4px}

/* 合作品牌 */
.partner-grid{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.partner-item{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius);padding:12px 22px;font-size:14px;font-weight:600;color:var(--c-muted);transition:all var(--transition);min-width:100px;text-align:center}
.partner-item:hover{border-color:var(--c-secondary);color:var(--c-secondary)}

/* 面包屑 */
.breadcrumb{padding:14px 0;font-size:13px;color:var(--c-muted);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.breadcrumb a{color:var(--c-muted)}
.breadcrumb a:hover{color:var(--c-secondary)}
.breadcrumb .sep{color:var(--c-border)}
.breadcrumb .current{color:var(--c-secondary)}

/* 标签云 */
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.tag{background:rgba(76,175,80,0.1);border:1px solid var(--c-border);color:var(--c-accent);font-size:12px;padding:5px 12px;border-radius:16px;transition:all var(--transition);text-decoration:none}
.tag:hover{background:var(--c-secondary);color:#fff;border-color:var(--c-secondary)}

/* 分类按钮 */
.cat-nav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}
.cat-btn{padding:8px 16px;border-radius:20px;font-size:13px;font-weight:600;background:var(--c-card);border:1px solid var(--c-border);color:var(--c-muted);cursor:pointer;transition:all var(--transition)}
.cat-btn:hover,.cat-btn.active{background:var(--grad);color:#fff;border-color:transparent}

/* 通知条 */
.notice-bar{background:rgba(76,175,80,0.08);border:1px solid var(--c-border);border-radius:var(--radius);padding:12px 16px;display:flex;align-items:center;gap:10px;margin-bottom:22px;font-size:14px;color:var(--c-muted)}

/* 分享 */
.share-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:18px;background:var(--c-card);border-radius:var(--radius);border:1px solid var(--c-border)}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:20px;font-size:13px;font-weight:600;color:#fff;cursor:pointer;transition:opacity var(--transition);border:none}
.share-btn:hover{opacity:0.85}

/* 页脚 */
.site-ft{background:var(--c-darker);border-top:1px solid var(--c-border);padding:56px 0 0}
.ft-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;margin-bottom:36px}
.ft-brand .ft-logo{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.ft-brand .ft-logo img{height:34px;width:34px;object-fit:contain}
.ft-brand .ft-logo span{font-size:18px;font-weight:700;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.ft-desc{font-size:13px;color:var(--c-muted);line-height:1.7;margin-bottom:14px}
.ft-col h4{font-size:15px;font-weight:700;margin-bottom:14px}
.ft-col ul li{margin-bottom:9px}
.ft-col ul li a{font-size:13px;color:var(--c-muted)}
.ft-col ul li a:hover{color:var(--c-secondary)}
.ft-bottom{border-top:1px solid var(--c-border);padding:18px 0;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:12px;color:var(--c-muted)}
.ft-bottom a{color:var(--c-muted)}
.ft-bottom a:hover{color:var(--c-secondary)}

/* 内页Hero */
.page-hero{background:var(--c-section);padding:44px 0 30px;border-bottom:1px solid var(--c-border)}
.page-hero h1{font-size:clamp(22px,4vw,36px);font-weight:800;margin-bottom:8px}
.page-hero p{font-size:15px;color:var(--c-muted)}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:start}
.contact-item{display:flex;align-items:flex-start;gap:12px;margin-bottom:14px;padding:12px 14px;background:var(--c-card);border-radius:var(--radius);border:1px solid var(--c-border)}
.contact-ico{width:40px;height:40px;border-radius:6px;background:rgba(76,175,80,0.12);display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.contact-label{font-size:12px;color:var(--c-muted);margin-bottom:3px}
.contact-val{font-size:14px;font-weight:600}
.qr-item{text-align:center}
.qr-item img{width:120px;height:120px;border-radius:var(--radius);border:2px solid var(--c-border);object-fit:cover}
.qr-item p{font-size:12px;color:var(--c-muted);margin-top:6px}

/* 响应式 */
@media(max-width:1024px){
  .ft-grid{grid-template-columns:1fr 1fr}
  .ai-grid{grid-template-columns:1fr 1fr}
  .howto-steps{grid-template-columns:1fr 1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
  .hd-inner{height:54px}
  .main-nav{display:none;flex-direction:column;position:absolute;top:54px;left:0;right:0;background:rgba(10,31,13,0.99);padding:14px;border-bottom:1px solid var(--c-border);z-index:999;gap:4px}
  .main-nav.open{display:flex}
  .main-nav a{padding:10px 14px;width:100%}
  .nav-toggle{display:flex}
  .hd-search{display:none}
  .hero{min-height:340px}
  .vid-grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .expert-grid{grid-template-columns:1fr 1fr}
  .review-grid{grid-template-columns:1fr}
  .ft-grid{grid-template-columns:1fr;gap:22px}
  .ai-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr 1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .section{padding:40px 0}
}
@media(max-width:480px){
  .vid-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .hero-actions{flex-direction:column}
  .btn{width:100%;justify-content:center}
  .ft-bottom{flex-direction:column;text-align:center}
}

/* 滚动条 */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--c-darker)}
::-webkit-scrollbar-thumb{background:var(--c-primary);border-radius:3px}
::selection{background:rgba(76,175,80,0.3);color:#fff}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--c-secondary);outline-offset:2px}