/* ========================================
   抖阴 - 动物写真与视频社区 全站样式表
   品牌色: 深海蓝 #1a3a5c | 琥珀金 #f0a030
   辅助色: 暖白 #faf7f2 | 浅灰 #e8e4df | 深灰 #2d2d2d
   ======================================== */

/* Reset & Base */
*,*::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:#2d2d2d;background:#faf7f2;line-height:1.8;overflow-x:hidden}
a{color:#1a3a5c;text-decoration:none;transition:color .3s}
a:hover{color:#f0a030}
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:#1a3a5c}

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

/* ========== Header ========== */
.site-header{background:#1a3a5c;position:sticky;top:0;z-index:1000;box-shadow:0 2px 12px rgba(0,0,0,.15)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;max-width:1200px;margin:0 auto}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{height:42px;width:auto}
.logo-wrap .brand-name{color:#f0a030;font-size:1.5rem;font-weight:800;letter-spacing:2px}

/* Navigation */
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{color:#fff;padding:12px 16px;font-size:.95rem;transition:background .3s,color .3s;border-radius:4px}
.main-nav a:hover,.main-nav a.active{background:rgba(240,160,48,.2);color:#f0a030}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:1.6rem;cursor:pointer;padding:8px}

/* Search Bar */
.search-bar{background:rgba(255,255,255,.08);padding:8px 0;border-bottom:1px solid rgba(255,255,255,.06)}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;max-width:560px;width:100%}
.search-box input{flex:1;padding:10px 18px;border:2px solid #e8e4df;border-right:none;border-radius:25px 0 0 25px;font-size:.95rem;outline:none;background:#fff;transition:border-color .3s}
.search-box input:focus{border-color:#f0a030}
.search-box button{padding:10px 24px;background:#f0a030;color:#fff;border:2px solid #f0a030;border-radius:0 25px 25px 0;cursor:pointer;font-size:.95rem;font-weight:600;transition:background .3s}
.search-box button:hover{background:#d88e20}

/* Breadcrumb */
.breadcrumb{padding:12px 0;font-size:.85rem;color:#888}
.breadcrumb a{color:#1a3a5c}
.breadcrumb span{margin:0 6px;color:#ccc}

/* ========== Banner ========== */
.hero-banner{position:relative;height:520px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hero-banner .banner-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.65)}
.hero-banner .banner-content{position:relative;z-index:2;text-align:center;color:#fff;padding:20px}
.hero-banner h1{font-size:2.6rem;margin-bottom:16px;text-shadow:0 2px 8px rgba(0,0,0,.4)}
.hero-banner .subtitle{font-size:1.2rem;opacity:.92;max-width:680px;margin:0 auto 24px;line-height:1.7}
.hero-banner .cta-btn{display:inline-block;padding:14px 36px;background:#f0a030;color:#fff;border-radius:30px;font-size:1.05rem;font-weight:700;transition:transform .3s,box-shadow .3s}
.hero-banner .cta-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(240,160,48,.4)}

/* ========== Section Common ========== */
.section{padding:60px 0}
.section-alt{background:#fff}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:2rem;color:#1a3a5c;margin-bottom:8px}
.section-title p{color:#777;font-size:1rem;max-width:600px;margin:0 auto}
.section-title .tag{display:inline-block;background:#f0a030;color:#fff;padding:3px 14px;border-radius:20px;font-size:.8rem;margin-bottom:10px}

/* ========== Video Cards ========== */
.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,.08);transition:transform .3s,box-shadow .3s}
.video-card:hover{transform:translateY(-6px);box-shadow:0 8px 30px rgba(0,0,0,.15)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#1a3a5c}
.video-thumb img{position:absolute;inset: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:56px;height:56px;background:rgba(240,160,48,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s}
.play-btn::after{content:"";border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:4px}
.video-card:hover .play-btn{opacity:1}
.video-info{padding:14px 16px}
.video-info h3{font-size:1rem;color:#2d2d2d;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:12px;font-size:.8rem;color:#999}
.video-meta span{display:flex;align-items:center;gap:3px}
.duration-tag{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.7);color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem}

/* ========== Module Grid ========== */
.module-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.module-card{background:#fff;border-radius:14px;padding:30px 24px;text-align:center;box-shadow:0 4px 16px rgba(0,0,0,.06);transition:transform .3s}
.module-card:hover{transform:translateY(-4px)}
.module-card .icon{width:64px;height:64px;margin:0 auto 16px;background:#f0a030;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.8rem;color:#fff}
.module-card h3{font-size:1.15rem;margin-bottom:8px;color:#1a3a5c}
.module-card p{font-size:.9rem;color:#777;line-height:1.6}

/* ========== Expert Cards ========== */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:#fff;border-radius:14px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,.08);text-align:center;transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-card .avatar{width:100%;aspect-ratio:1;object-fit:cover}
.expert-card .info{padding:18px 16px}
.expert-card h4{font-size:1.05rem;color:#1a3a5c;margin-bottom:4px}
.expert-card .role{color:#f0a030;font-size:.85rem;margin-bottom:8px}
.expert-card p{font-size:.85rem;color:#777;line-height:1.5}
.expert-card .btn-group{display:flex;gap:8px;justify-content:center;margin-top:12px}
.btn-sm{padding:6px 16px;border-radius:20px;font-size:.8rem;border:1px solid #1a3a5c;color:#1a3a5c;transition:all .3s;background:transparent;cursor:pointer}
.btn-sm:hover{background:#1a3a5c;color:#fff}
.btn-sm.primary{background:#f0a030;border-color:#f0a030;color:#fff}
.btn-sm.primary:hover{background:#d88e20}

/* ========== FAQ ========== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid #e8e4df;padding:0}
.faq-question{display:flex;justify-content:space-between;align-items:center;padding:18px 0;cursor:pointer;font-size:1.05rem;font-weight:600;color:#1a3a5c;transition:color .3s}
.faq-question:hover{color:#f0a030}
.faq-question .arrow{transition:transform .3s;font-size:1.2rem;color:#f0a030}
.faq-item.active .faq-question .arrow{transform:rotate(180deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 0 0 0}
.faq-item.active .faq-answer{max-height:300px;padding-bottom:18px}
.faq-answer p{color:#666;font-size:.95rem;line-height:1.7}

/* ========== Reviews ========== */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.review-card{background:#fff;border-radius:14px;padding:24px;box-shadow:0 4px 16px rgba(0,0,0,.06)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.review-avatar{width:48px;height:48px;border-radius:50%;background:#f0a030;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.1rem}
.review-name{font-weight:600;color:#1a3a5c}
.review-date{font-size:.8rem;color:#999}
.review-stars{color:#f0a030;margin-bottom:8px;font-size:.9rem}
.review-text{color:#555;font-size:.95rem;line-height:1.7}

/* ========== Community ========== */
.community-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.community-card{background:#fff;border-radius:14px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,.08);transition:transform .3s}
.community-card:hover{transform:translateY(-4px)}
.community-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.community-card .card-body{padding:16px}
.community-card h4{color:#1a3a5c;margin-bottom:6px}
.community-card p{font-size:.9rem;color:#777}

/* ========== Contact ========== */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:40px;align-items:start}
.contact-info{background:#fff;border-radius:14px;padding:30px;box-shadow:0 4px 16px rgba(0,0,0,.06)}
.contact-info h3{color:#1a3a5c;margin-bottom:16px;font-size:1.3rem}
.contact-item{display:flex;gap:12px;margin-bottom:16px;align-items:flex-start}
.contact-item .label{font-weight:600;color:#1a3a5c;min-width:80px}
.contact-item .value{color:#555}
.qr-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.qr-item{text-align:center}
.qr-item img{width:160px;height:160px;margin:0 auto 8px;border-radius:8px}
.qr-item p{font-size:.85rem;color:#777}

/* ========== Share ========== */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 20px;border-radius:25px;font-size:.9rem;color:#fff;transition:opacity .3s;cursor:pointer;border:none}
.share-btn:hover{opacity:.85}
.share-wechat{background:#07c160}
.share-weibo{background:#e6162d}
.share-douyin{background:#161823}
.share-bilibili{background:#00a1d6}

/* ========== Footer ========== */
.site-footer{background:#1a3a5c;color:rgba(255,255,255,.8);padding:40px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer-col h4{color:#f0a030;margin-bottom:16px;font-size:1rem}
.footer-col a{display:block;color:rgba(255,255,255,.7);padding:4px 0;font-size:.9rem;transition:color .3s}
.footer-col a:hover{color:#f0a030}
.footer-col p{font-size:.9rem;line-height:1.6}
.footer-logo{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.footer-logo img{height:36px}
.footer-logo span{color:#f0a030;font-size:1.3rem;font-weight:800}
.footer-bottom{text-align:center;padding:20px 0;font-size:.85rem;color:rgba(255,255,255,.5)}
.footer-qr{display:flex;gap:16px;margin-top:12px}
.footer-qr img{width:100px;height:100px;border-radius:6px}

/* ========== How-To Guide ========== */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.howto-step{background:#fff;border-radius:14px;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:#f0a030;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.95rem}
.howto-step h4{margin-top:8px;color:#1a3a5c;margin-bottom:8px}
.howto-step p{font-size:.9rem;color:#777}

/* ========== Partner Logos ========== */
.partner-wall{display:flex;flex-wrap:wrap;gap:24px;justify-content:center;align-items:center}
.partner-wall .partner-item{background:#fff;padding:16px 28px;border-radius:10px;box-shadow:0 2px 8px rgba(0,0,0,.06);font-weight:700;color:#1a3a5c;font-size:1rem}

/* ========== Inner Page ========== */
.page-hero{background:#1a3a5c;padding:60px 0 40px;text-align:center;color:#fff}
.page-hero h1{font-size:2.2rem;color:#fff;margin-bottom:8px}
.page-hero p{opacity:.8;font-size:1rem}
.content-section{padding:50px 0}
.content-section h2{color:#1a3a5c;font-size:1.6rem;margin-bottom:16px}
.content-section p{color:#555;line-height:1.8;margin-bottom:16px}
.content-section img{border-radius:12px;margin:20px 0}

/* ========== 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:repeat(2,1fr)}
  .howto-steps{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#1a3a5c;flex-direction:column;padding:10px 0;box-shadow:0 4px 12px rgba(0,0,0,.2)}
  .main-nav.open{display:flex}
  .main-nav a{padding:12px 20px;border-radius:0}
  .nav-toggle{display:block}
  .hero-banner{height:380px}
  .hero-banner h1{font-size:1.8rem}
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .module-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .community-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .section{padding:40px 0}
  .section-title h2{font-size:1.5rem}
  .qr-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .header-inner{padding:8px 12px}
  .logo-wrap .brand-name{font-size:1.2rem}
  .search-box input{padding:8px 14px}
}

/* Interference tags - hidden but present for structure */
.dyrn-noise{position:absolute;width:0;height:0;overflow:hidden;opacity:0;pointer-events:none;z-index:-9999}