/* ========================================
   寸止挑战 - 植物视频社区 外部样式表
   品牌色：翡翠绿 #1B5E20 / 金叶色 #F9A825 / 森林绿 #2E7D32
   ======================================== */

/* === 基础重置 === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","WenQuanYi Micro Hei",sans-serif;color:#333;background:#f8faf5;line-height:1.7;overflow-x:hidden}
a{color:#2E7D32;text-decoration:none;transition:color .3s}
a:hover{color:#F9A825}
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:#1B5E20}

/* === 导航栏 === */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:linear-gradient(135deg,#1B3A1B 0%,#0D2818 100%);box-shadow:0 2px 20px rgba(0,0,0,.3);transition:all .3s}
.nav-container{max-width:1320px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:68px}
.nav-logo{display:flex;align-items:center;gap:10px}
.nav-logo img{height:42px;width:auto}
.nav-logo span{color:#fff;font-size:1.2rem;font-weight:700}
.nav-menu{display:flex;gap:6px;align-items:center}
.nav-menu a{color:#cde6cd;padding:8px 18px;border-radius:20px;font-size:.95rem;transition:all .3s;font-weight:500}
.nav-menu a:hover,.nav-menu a.active{background:linear-gradient(135deg,#2E7D32,#43A047);color:#fff}
.nav-search{display:flex;align-items:center;background:rgba(255,255,255,.12);border-radius:24px;padding:4px 4px 4px 16px;border:1px solid rgba(255,255,255,.15)}
.nav-search input{background:transparent;border:none;outline:none;color:#fff;width:160px;font-size:.9rem}
.nav-search input::placeholder{color:rgba(255,255,255,.5)}
.nav-search button{width:34px;height:34px;border-radius:50%;border:none;background:linear-gradient(135deg,#2E7D32,#66BB6A);color:#fff;cursor:pointer;font-size:1rem;display:flex;align-items:center;justify-content:center}
.mobile-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* === Hero Banner === */
.hero-banner{position:relative;min-height:600px;display:flex;align-items:center;justify-content:center;text-align:center;background-size:cover;background-position:center;background-attachment:fixed;margin-top:68px}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,40,24,.75) 0%,rgba(27,62,27,.6) 50%,rgba(13,40,24,.8) 100%)}
.hero-content{position:relative;z-index:2;max-width:800px;padding:40px 24px}
.hero-content h1{font-size:3rem;color:#fff;margin-bottom:16px;text-shadow:0 2px 10px rgba(0,0,0,.4)}
.hero-content h1 em{font-style:normal;color:#F9A825}
.hero-content p{font-size:1.2rem;color:rgba(255,255,255,.85);margin-bottom:32px;line-height:1.8}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{display:inline-flex;align-items:center;gap:8px;padding:14px 36px;border-radius:30px;background:linear-gradient(135deg,#2E7D32,#43A047);color:#fff;font-size:1.05rem;font-weight:600;transition:all .3s;box-shadow:0 4px 15px rgba(46,125,50,.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 25px rgba(46,125,50,.5);color:#fff}
.btn-outline{display:inline-flex;align-items:center;gap:8px;padding:14px 36px;border-radius:30px;border:2px solid rgba(255,255,255,.5);color:#fff;font-size:1.05rem;font-weight:600;transition:all .3s}
.btn-outline:hover{background:rgba(255,255,255,.15);border-color:#F9A825;color:#F9A825}

/* === 通用区块 === */
.section{padding:80px 24px}
.section-dark{background:linear-gradient(180deg,#0D2818,#1B3A1B);color:#fff}
.section-dark h2,.section-dark h3,.section-dark h4{color:#66BB6A}
.section-light{background:#f0f7f0}
.section-title{text-align:center;margin-bottom:50px}
.section-title h2{font-size:2.2rem;margin-bottom:12px;position:relative;display:inline-block}
.section-title h2::after{content:'';position:absolute;bottom:-8px;left:50%;transform:translateX(-50%);width:60px;height:3px;background:linear-gradient(90deg,#2E7D32,#F9A825);border-radius:2px}
.section-title p{color:#666;font-size:1.05rem;margin-top:16px}
.section-dark .section-title p{color:rgba(255,255,255,.7)}
.container{max-width:1280px;margin:0 auto}

/* === 视频卡片 === */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.video-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,.08);transition:all .4s}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(0,0,0,.15)}
.video-thumb{position:relative;overflow:hidden;aspect-ratio:3/2}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .video-thumb img{transform:scale(1.08)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(0);width:64px;height:64px;background:rgba(46,125,50,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all .4s;opacity:0}
.play-btn::after{content:'';width:0;height:0;border-style:solid;border-width:12px 0 12px 22px;border-color:transparent transparent transparent #fff;margin-left:4px}
.video-card:hover .play-btn{transform:translate(-50%,-50%) scale(1);opacity:1}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:.8rem}
.video-info{padding:16px}
.video-info h3{font-size:1rem;color:#1B5E20;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:12px;color:#888;font-size:.85rem}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tag{display:inline-block;background:#e8f5e9;color:#2E7D32;padding:2px 10px;border-radius:12px;font-size:.75rem;margin-top:8px}

/* === 专家团队 === */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px}
.expert-card{background:#fff;border-radius:16px;overflow:hidden;text-align:center;padding:30px 20px;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:all .4s}
.expert-card:hover{transform:translateY(-5px);box-shadow:0 10px 35px rgba(0,0,0,.12)}
.expert-avatar{width:120px;height:120px;border-radius:50%;margin:0 auto 16px;overflow:hidden;border:4px solid #e8f5e9}
.expert-avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h4{color:#1B5E20;font-size:1.1rem;margin-bottom:6px}
.expert-card .expert-title{color:#F9A825;font-size:.9rem;margin-bottom:10px}
.expert-card p{color:#666;font-size:.88rem;line-height:1.6}
.expert-links{margin-top:14px;display:flex;gap:10px;justify-content:center}
.expert-links a{padding:6px 16px;border-radius:20px;font-size:.82rem;border:1px solid #2E7D32;color:#2E7D32;transition:all .3s}
.expert-links a:hover{background:#2E7D32;color:#fff}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:12px;margin-bottom:12px;overflow:hidden;box-shadow:0 2px 10px rgba(0,0,0,.05)}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:#1B5E20;font-size:1rem;transition:background .3s}
.faq-question:hover{background:#f0f7f0}
.faq-question::after{content:'+';font-size:1.4rem;color:#2E7D32;transition:transform .3s}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 24px}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 18px}
.faq-answer p{color:#555;line-height:1.8;font-size:.95rem}

/* === 用户评论 === */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.review-card{background:#fff;border-radius:16px;padding:28px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.review-header{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.review-avatar{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,#2E7D32,#66BB6A);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.1rem}
.review-name{font-weight:600;color:#1B5E20}
.review-date{font-size:.82rem;color:#999}
.review-stars{color:#F9A825;margin-bottom:10px;font-size:1.1rem}
.review-card p{color:#555;line-height:1.8;font-size:.95rem}

/* === 合作品牌 === */
.partner-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center}
.partner-item{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:12px;padding:16px 28px;color:rgba(255,255,255,.7);font-size:.95rem;transition:all .3s}
.partner-item:hover{background:rgba(255,255,255,.15);color:#F9A825;border-color:#F9A825}

/* === How-To === */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.howto-step{text-align:center;padding:30px 20px}
.step-num{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,#2E7D32,#66BB6A);color:#fff;font-size:1.4rem;font-weight:700;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.howto-step h4{color:#1B5E20;margin-bottom:8px}
.howto-step p{color:#666;font-size:.9rem}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.contact-card{background:#fff;border-radius:16px;padding:30px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.contact-card h4{color:#1B5E20;margin-bottom:12px;font-size:1.1rem}
.contact-card p{color:#666;font-size:.9rem;line-height:1.8}
.contact-card img{margin:12px auto;border-radius:8px}

/* === 社交分享 === */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.share-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 22px;border-radius:24px;color:#fff;font-size:.9rem;transition:all .3s}
.share-btn:hover{transform:translateY(-2px);color:#fff}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#161823}
.share-bilibili{background:#00A1D6}

/* === AI赋能 === */
.ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ai-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:30px;text-align:center;transition:all .4s}
.ai-card:hover{background:rgba(255,255,255,.12);transform:translateY(-4px)}
.ai-icon{font-size:2.5rem;margin-bottom:16px}
.ai-card h4{color:#66BB6A;margin-bottom:10px}
.ai-card p{color:rgba(255,255,255,.7);font-size:.9rem;line-height:1.7}

/* === 社区功能 === */
.community-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.community-card{background:#fff;border-radius:16px;padding:28px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:all .4s}
.community-card:hover{transform:translateY(-4px);box-shadow:0 10px 35px rgba(0,0,0,.12)}
.community-icon{font-size:2.2rem;margin-bottom:14px}
.community-card h4{color:#1B5E20;margin-bottom:8px}
.community-card p{color:#666;font-size:.9rem}

/* === 页脚 === */
.site-footer{background:linear-gradient(135deg,#0D2818,#1B3A1B);color:rgba(255,255,255,.7);padding:60px 24px 30px}
.footer-grid{max-width:1280px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand img{height:40px;margin-bottom:14px}
.footer-brand p{font-size:.9rem;line-height:1.8;color:rgba(255,255,255,.6)}
.footer-col h4{color:#66BB6A;margin-bottom:16px;font-size:1rem}
.footer-col a{display:block;color:rgba(255,255,255,.6);padding:4px 0;font-size:.9rem;transition:color .3s}
.footer-col a:hover{color:#F9A825}
.footer-qr{display:flex;gap:20px;margin-top:16px}
.footer-qr img{width:100px;border-radius:8px}
.footer-bottom{max-width:1280px;margin:0 auto;border-top:1px solid rgba(255,255,255,.1);padding-top:24px;text-align:center;font-size:.85rem;color:rgba(255,255,255,.5)}

/* === 面包屑 === */
.breadcrumb{padding:12px 24px;background:#e8f5e9;font-size:.88rem}
.breadcrumb a{color:#2E7D32}
.breadcrumb span{color:#888;margin:0 6px}

/* === 娱乐专区 === */
.entertainment-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.ent-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:all .4s}
.ent-card:hover{transform:translateY(-4px);box-shadow:0 10px 35px rgba(0,0,0,.12)}
.ent-card .ent-icon{font-size:2.5rem;padding:24px 20px 10px;text-align:center}
.ent-card h4{text-align:center;color:#1B5E20;padding:0 16px 6px}
.ent-card p{text-align:center;color:#666;font-size:.88rem;padding:0 16px 20px}

/* === 响应式 === */
@media(max-width:1024px){
.video-grid,.expert-grid{grid-template-columns:repeat(2,1fr)}
.entertainment-grid,.howto-steps{grid-template-columns:repeat(2,1fr)}
.ai-grid,.community-grid,.contact-grid{grid-template-columns:repeat(2,1fr)}
.footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
.nav-menu{display:none;position:absolute;top:68px;left:0;width:100%;background:#0D2818;flex-direction:column;padding:16px;gap:4px}
.nav-menu.open{display:flex}
.mobile-toggle{display:block}
.nav-search{display:none}
.hero-banner{min-height:450px}
.hero-content h1{font-size:2rem}
.hero-content p{font-size:1rem}
.video-grid,.expert-grid,.entertainment-grid,.howto-steps{grid-template-columns:1fr}
.ai-grid,.community-grid,.contact-grid{grid-template-columns:1fr}
.review-grid{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr}
.section{padding:50px 16px}
}

/* === 干扰标签隐藏 === */
.dx-noise{position:absolute;width:0;height:0;overflow:hidden;opacity:0;pointer-events:none;z-index:-9999}