/* ============================================
   小蓝视频 - 动物写真与视频社区 全站样式表
   品牌色: #1a5c2e (森林绿) / #f7a823 (暖橙) / #2d2d2d (深灰)
   域名: Lhaaunz.cn
   ============================================ */

/* 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","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;color:#2d2d2d;background:#f9fafb;line-height:1.8;overflow-x:hidden}
a{color:#1a5c2e;text-decoration:none;transition:color .3s}
a:hover{color:#f7a823}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.4;color:#1a3a1a}

/* Container */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section-padding{padding:60px 0}

/* ============ Header / Navigation ============ */
.site-header{background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.08);position:sticky;top:0;z-index:1000;transition:box-shadow .3s}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{height:46px;width:auto}
.logo-wrap .brand-name{font-size:22px;font-weight:800;color:#1a5c2e;letter-spacing:1px}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{padding:8px 14px;border-radius:6px;font-size:15px;font-weight:500;color:#2d2d2d;transition:all .3s}
.main-nav a:hover,.main-nav a.active{background:#1a5c2e;color:#fff}
.nav-toggle{display:none;background:none;border:none;font-size:26px;cursor:pointer;color:#1a5c2e}

/* Search Bar */
.search-bar{margin:0;padding:10px 0;background:#f0f7f2;border-bottom:1px solid #e0ece3}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;width:100%;max-width:580px;border-radius:24px;overflow:hidden;box-shadow:0 2px 8px rgba(26,92,46,.12)}
.search-box input{flex:1;padding:10px 20px;border:2px solid #1a5c2e;border-right:none;border-radius:24px 0 0 24px;font-size:15px;outline:none;transition:border-color .3s}
.search-box input:focus{border-color:#f7a823}
.search-box button{padding:10px 24px;background:#1a5c2e;color:#fff;border:2px solid #1a5c2e;border-radius:0 24px 24px 0;font-size:15px;cursor:pointer;transition:background .3s}
.search-box button:hover{background:#14491f}

/* ============ Banner / Hero ============ */
.hero-banner{position:relative;height:520px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hero-banner .hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:brightness(.65)}
.hero-content{position:relative;z-index:2;text-align:center;color:#fff;max-width:750px;padding:0 20px}
.hero-content h1{font-size:42px;margin-bottom:16px;text-shadow:0 3px 12px rgba(0,0,0,.5)}
.hero-content p{font-size:18px;line-height:1.8;text-shadow:0 2px 8px rgba(0,0,0,.4)}
.hero-content .hero-btn{display:inline-block;margin-top:24px;padding:14px 36px;background:#f7a823;color:#fff;font-size:17px;font-weight:600;border-radius:30px;transition:all .3s;box-shadow:0 4px 16px rgba(247,168,35,.4)}
.hero-content .hero-btn:hover{background:#e5971a;transform:translateY(-2px)}

/* ============ Section Titles ============ */
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:32px;color:#1a3a1a;position:relative;display:inline-block;padding-bottom:12px}
.section-title h2::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60px;height:3px;background:linear-gradient(90deg,#1a5c2e,#f7a823);border-radius:2px}
.section-title p{color:#666;font-size:16px;margin-top:12px}

/* ============ Video Card Grid ============ */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,.06);transition:all .3s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 8px 28px rgba(0,0,0,.12)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#e8e8e8}
.video-thumb img,.video-thumb video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb img,.video-card:hover .video-thumb video{transform:scale(1.06)}
.video-play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:56px;height:56px;background:rgba(26,92,46,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s}
.video-play-btn::after{content:'';border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:3px}
.video-card:hover .video-play-btn{opacity:1}
.video-info{padding:14px 16px}
.video-info h4{font-size:15px;color:#1a3a1a;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:14px;font-size:13px;color:#999}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tag{display:inline-block;padding:2px 8px;background:#e8f5e9;color:#1a5c2e;font-size:12px;border-radius:4px;margin-top:6px}

/* ============ Category Tabs ============ */
.cat-tabs{display:flex;justify-content:center;gap:12px;margin-bottom:32px;flex-wrap:wrap}
.cat-tabs .tab{padding:8px 20px;border:2px solid #1a5c2e;border-radius:20px;font-size:14px;color:#1a5c2e;cursor:pointer;transition:all .3s}
.cat-tabs .tab:hover,.cat-tabs .tab.active{background:#1a5c2e;color:#fff}

/* ============ Expert Cards ============ */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:#fff;border-radius:12px;overflow:hidden;text-align:center;padding:28px 20px;box-shadow:0 4px 16px rgba(0,0,0,.06);transition:all .3s}
.expert-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.1)}
.expert-card .avatar{width:100px;height:100px;border-radius:50%;margin:0 auto 16px;object-fit:cover;border:3px solid #1a5c2e}
.expert-card h4{font-size:18px;color:#1a3a1a;margin-bottom:4px}
.expert-card .role{color:#f7a823;font-size:14px;font-weight:600;margin-bottom:10px}
.expert-card p{font-size:13px;color:#666;line-height:1.7;margin-bottom:14px}
.expert-card .btn-sm{display:inline-block;padding:6px 18px;border:2px solid #1a5c2e;color:#1a5c2e;border-radius:20px;font-size:13px;transition:all .3s;margin:0 4px}
.expert-card .btn-sm:hover{background:#1a5c2e;color:#fff}

/* ============ FAQ Accordion ============ */
.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,.04);overflow:hidden}
.faq-question{padding:18px 24px;font-size:16px;font-weight:600;color:#1a3a1a;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .3s}
.faq-question:hover{background:#f0f7f2}
.faq-question::after{content:'+';font-size:22px;color:#1a5c2e;transition:transform .3s}
.faq-item.open .faq-question::after{content:'-';transform:rotate(180deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all .4s ease;color:#555;font-size:15px;line-height:1.8}
.faq-item.open .faq-answer{padding:0 24px 18px;max-height:500px}

/* ============ Reviews / Testimonials ============ */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.review-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 16px rgba(0,0,0,.06);border-left:4px solid #1a5c2e}
.review-card .stars{color:#f7a823;font-size:18px;margin-bottom:8px}
.review-card blockquote{font-size:15px;color:#444;line-height:1.8;margin-bottom:12px;font-style:italic}
.review-card .reviewer{font-size:14px;color:#1a5c2e;font-weight:600}
.review-card .review-date{font-size:12px;color:#999}

/* ============ Community Section ============ */
.community-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.community-card{background:linear-gradient(135deg,#f0f7f2,#fff);border-radius:12px;padding:28px;text-align:center;box-shadow:0 4px 16px rgba(0,0,0,.06);transition:all .3s}
.community-card:hover{transform:translateY(-4px)}
.community-card .icon{font-size:42px;margin-bottom:14px}
.community-card h4{font-size:18px;color:#1a3a1a;margin-bottom:8px}
.community-card p{font-size:14px;color:#666}

/* ============ AI Section ============ */
.ai-features{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ai-card{background:#fff;border-radius:12px;padding:32px 24px;text-align:center;box-shadow:0 4px 16px rgba(0,0,0,.06);border-top:3px solid #1a5c2e;transition:all .3s}
.ai-card:hover{transform:translateY(-4px);border-top-color:#f7a823}
.ai-card .ai-icon{font-size:48px;margin-bottom:16px}
.ai-card h4{font-size:18px;color:#1a3a1a;margin-bottom:10px}
.ai-card p{font-size:14px;color:#666;line-height:1.7}

/* ============ Contact Section ============ */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-info{background:#fff;border-radius:12px;padding:32px;box-shadow:0 4px 16px rgba(0,0,0,.06)}
.contact-info h3{font-size:22px;color:#1a3a1a;margin-bottom:20px}
.contact-info .info-item{display:flex;gap:12px;margin-bottom:16px;font-size:15px;color:#444}
.contact-info .info-item .label{font-weight:600;color:#1a5c2e;min-width:80px}
.contact-qr{display:flex;gap:24px;margin-top:20px}
.contact-qr .qr-item{text-align:center}
.contact-qr .qr-item img{width:140px;height:140px;border-radius:8px;margin-bottom:8px}
.contact-qr .qr-item span{font-size:13px;color:#666}

/* ============ Share Buttons ============ */
.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;font-size:14px;color:#fff;transition:all .3s;cursor:pointer}
.share-btn:hover{opacity:.85;transform:translateY(-2px);color:#fff}
.share-wechat{background:#07c160}
.share-weibo{background:#e6162d}
.share-douyin{background:#161823}
.share-bilibili{background:#00a1d6}

/* ============ Footer ============ */
.site-footer{background:#1a3a1a;color:#c8d6c8;padding:48px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-col h4{color:#fff;font-size:17px;margin-bottom:16px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:#f7a823}
.footer-col p{font-size:14px;line-height:1.8;margin-bottom:8px}
.footer-col a{color:#c8d6c8;font-size:14px;display:block;margin-bottom:8px;transition:color .3s}
.footer-col a:hover{color:#f7a823}
.footer-col .footer-logo{height:40px;margin-bottom:12px}
.footer-bottom{text-align:center;padding:20px 0;font-size:13px;color:#8a9f8a}
.footer-bottom a{color:#f7a823}

/* ============ Breadcrumb ============ */
.breadcrumb{padding:14px 0;font-size:14px;color:#888;background:#f5f5f5;border-bottom:1px solid #eee}
.breadcrumb a{color:#1a5c2e}
.breadcrumb span{margin:0 6px;color:#ccc}

/* ============ How-To Guide ============ */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.howto-step{background:#fff;border-radius:12px;padding:28px 20px;text-align:center;box-shadow:0 4px 16px rgba(0,0,0,.06);position:relative}
.howto-step::before{counter-increment:step;content:counter(step);position:absolute;top:-14px;left:50%;transform:translateX(-50%);width:32px;height:32px;background:#1a5c2e;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px}
.howto-step h4{margin-top:8px;font-size:16px;color:#1a3a1a;margin-bottom:8px}
.howto-step p{font-size:14px;color:#666}

/* ============ Partner Logos ============ */
.partner-wall{display:flex;justify-content:center;gap:32px;flex-wrap:wrap;align-items:center}
.partner-wall img{height:50px;filter:grayscale(1);opacity:.6;transition:all .3s}
.partner-wall img:hover{filter:grayscale(0);opacity:1}

/* ============ Inner Page Content ============ */
.page-hero{height:300px;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden}
.page-hero .hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:brightness(.5)}
.page-hero .hero-content{position:relative;z-index:2;text-align:center;color:#fff}
.page-hero h1{font-size:36px;text-shadow:0 3px 12px rgba(0,0,0,.5)}
.page-content{padding:48px 0}
.page-content h2{font-size:26px;color:#1a3a1a;margin-bottom:20px}
.page-content h3{font-size:20px;color:#1a5c2e;margin:24px 0 12px}
.page-content p{font-size:15px;color:#444;line-height:1.9;margin-bottom:16px}
.content-img{border-radius:12px;margin:20px 0;box-shadow:0 4px 16px rgba(0,0,0,.08)}

/* ============ Responsive ============ */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .howto-steps{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .header-inner{flex-wrap:wrap}
  .main-nav{display:none;width:100%;flex-direction:column;padding:10px 0}
  .main-nav.open{display:flex}
  .nav-toggle{display:block}
  .hero-banner{height:380px}
  .hero-content h1{font-size:28px}
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .expert-grid{grid-template-columns:1fr}
  .community-grid{grid-template-columns:1fr}
  .ai-features{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .section-title h2{font-size:24px}
  .section-padding{padding:40px 0}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .search-box{flex-direction:column;border-radius:12px}
  .search-box input{border-right:2px solid #1a5c2e;border-radius:12px 12px 0 0}
  .search-box button{border-radius:0 0 12px 12px}
}

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

/* ============ Scroll Animation ============ */
.fade-in-on-scroll{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.fade-in-on-scroll.visible{opacity:1;transform:translateY(0)}

/* ============ Interference Tags (Hidden) ============ */
.l9l12{position:absolute;width:0;height:0;overflow:hidden;opacity:0;pointer-events:none;z-index:-9999}

/* ============ MCP Frontend Placeholder ============ */
.mcp-widget{background:#f8faf8;border:1px dashed #c8d6c8;border-radius:8px;padding:20px;text-align:center;color:#888;font-size:14px;margin:20px 0}

/* ============ Animation ============ */
@keyframes fadeInUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
.fade-in{animation:fadeInUp .6s ease forwards}