/* ========================================
   抖阴 - 原创样式表
   品牌：抖阴 | pclirnx.cn
   配色：甜心粉红 + 暖橙渐变
   ======================================== */

/* CSS Reset & Base */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:#333;background:#F8F0F4;line-height:1.7;overflow-x:hidden}
a{color:#E8456B;text-decoration:none;transition:color .3s}
a:hover{color:#FF7E5F}
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:#1A1A2E}

/* Container */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:2rem;background:linear-gradient(135deg,#E8456B,#FF7E5F);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:inline-block;margin-bottom:10px}
.section-title p{color:#666;font-size:1rem}

/* Header */
.site-header{background:#1A1A2E;position:sticky;top:0;z-index:1000;box-shadow:0 2px 20px rgba(0,0,0,.3)}
.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 span{font-size:1.4rem;font-weight:700;background:linear-gradient(135deg,#E8456B,#FF7E5F);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{color:#fff;padding:12px 16px;font-size:.95rem;transition:all .3s;position:relative}
.main-nav a:hover,.main-nav a.active{color:#FF7E5F}
.main-nav a::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:2px;background:linear-gradient(135deg,#E8456B,#FF7E5F);transition:width .3s}
.main-nav a:hover::after,.main-nav a.active::after{width:70%}
.mobile-menu-btn{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* Search Bar */
.search-bar{background:linear-gradient(135deg,#E8456B,#FF7E5F);padding:12px 0}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;max-width:600px;width:100%;background:#fff;border-radius:25px;overflow:hidden;box-shadow:0 2px 10px rgba(0,0,0,.1)}
.search-box input{flex:1;border:none;padding:10px 20px;font-size:.95rem;outline:none;color:#333}
.search-box button{background:linear-gradient(135deg,#E8456B,#FF7E5F);color:#fff;border:none;padding:10px 25px;cursor:pointer;font-size:.95rem;transition:opacity .3s}
.search-box button:hover{opacity:.85}

/* Hero Banner */
.hero-section{position:relative;height:520px;overflow:hidden}
.hero-section img{width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(to right,rgba(26,26,46,.85) 0%,rgba(26,26,46,.4) 50%,transparent 100%);display:flex;align-items:center}
.hero-content{max-width:1200px;margin:0 auto;padding:0 40px;color:#fff}
.hero-content h1{font-size:2.8rem;margin-bottom:15px;text-shadow:2px 2px 4px rgba(0,0,0,.3)}
.hero-content h1 span{color:#FF7E5F}
.hero-content p{font-size:1.15rem;margin-bottom:25px;max-width:550px;opacity:.9}
.hero-btns{display:flex;gap:15px}
.btn-primary{display:inline-block;background:linear-gradient(135deg,#E8456B,#FF7E5F);color:#fff;padding:12px 30px;border-radius:25px;font-size:1rem;font-weight:600;transition:all .3s;border:none;cursor:pointer}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 5px 20px rgba(232,69,107,.4);color:#fff}
.btn-outline{display:inline-block;border:2px solid #fff;color:#fff;padding:10px 28px;border-radius:25px;font-size:1rem;font-weight:600;transition:all .3s}
.btn-outline:hover{background:#fff;color:#E8456B}

/* Video Cards Grid */
.video-section{padding:60px 0}
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,.08);transition:all .3s;cursor:pointer}
.video-card:hover{transform:translateY(-5px);box-shadow:0 8px 30px rgba(232,69,107,.15)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#1A1A2E}
.video-thumb img{position:absolute;top:0;left: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:50px;height:50px;background:rgba(232,69,107,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s}
.video-card:hover .play-btn,.play-btn.visible{opacity:1;cursor:pointer}
.play-btn::after{content:'';width:0;height:0;border-style:solid;border-width:8px 0 8px 14px;border-color:transparent transparent transparent #fff;margin-left: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-info{padding:14px}
.video-info h3{font-size:.95rem;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.4}
.video-meta{display:flex;justify-content:space-between;color:#999;font-size:.8rem}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tags{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.video-tags span{background:#FFF0F3;color:#E8456B;padding:2px 8px;border-radius:10px;font-size:.72rem}

/* Service Section */
.service-section{padding:60px 0;background:#fff}
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}
.service-card{background:linear-gradient(135deg,#FFF5F7,#FFF0F3);border-radius:12px;padding:30px;text-align:center;transition:all .3s;border:1px solid transparent}
.service-card:hover{border-color:#E8456B;transform:translateY(-3px);box-shadow:0 8px 25px rgba(232,69,107,.1)}
.service-icon{width:60px;height:60px;background:linear-gradient(135deg,#E8456B,#FF7E5F);border-radius:15px;display:flex;align-items:center;justify-content:center;margin:0 auto 15px;font-size:1.5rem;color:#fff}
.service-card h3{font-size:1.1rem;margin-bottom:10px;color:#1A1A2E}
.service-card p{color:#666;font-size:.9rem;line-height:1.6}

/* Entertainment Section */
.entertainment-section{padding:60px 0}
.ent-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.ent-card{position:relative;border-radius:12px;overflow:hidden;height:280px;cursor:pointer}
.ent-card img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.ent-card:hover img{transform:scale(1.1)}
.ent-card-overlay{position:absolute;bottom:0;left:0;width:100%;padding:20px;background:linear-gradient(transparent,rgba(26,26,46,.85));color:#fff}
.ent-card-overlay h3{font-size:1.1rem;margin-bottom:5px}
.ent-card-overlay p{font-size:.82rem;opacity:.85}

/* AI Section */
.ai-section{padding:60px 0;background:linear-gradient(135deg,#1A1A2E,#2D2D4E)}
.ai-section .section-title h2{-webkit-text-fill-color:#fff;color:#fff;background:none}
.ai-section .section-title p{color:rgba(255,255,255,.7)}
.ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}
.ai-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:30px;text-align:center;transition:all .3s;backdrop-filter:blur(10px)}
.ai-card:hover{background:rgba(255,255,255,.12);border-color:rgba(232,69,107,.5);transform:translateY(-3px)}
.ai-card .ai-icon{width:60px;height:60px;background:linear-gradient(135deg,#E8456B,#FF7E5F);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 15px;font-size:1.5rem}
.ai-card h3{color:#fff;font-size:1.1rem;margin-bottom:10px}
.ai-card p{color:rgba(255,255,255,.7);font-size:.9rem}

/* Community Section */
.community-section{padding:60px 0}
.comm-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:25px}
.comm-card{display:flex;gap:20px;background:#fff;border-radius:12px;padding:25px;box-shadow:0 4px 15px rgba(0,0,0,.06);transition:all .3s}
.comm-card:hover{box-shadow:0 8px 25px rgba(232,69,107,.12);transform:translateY(-3px)}
.comm-icon{flex-shrink:0;width:50px;height:50px;background:linear-gradient(135deg,#E8456B,#FF7E5F);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.3rem;color:#fff}
.comm-text h3{font-size:1.05rem;margin-bottom:6px}
.comm-text p{color:#666;font-size:.88rem}

/* Expert Section */
.expert-section{padding:60px 0;background:#fff}
.expert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}
.expert-card{text-align:center;background:#F8F0F4;border-radius:12px;padding:30px 20px;transition:all .3s}
.expert-card:hover{box-shadow:0 8px 25px rgba(232,69,107,.12);transform:translateY(-3px)}
.expert-card img{width:100px;height:100px;border-radius:50%;object-fit:cover;margin:0 auto 15px;border:3px solid #E8456B}
.expert-card h3{font-size:1.05rem;margin-bottom:5px}
.expert-card .expert-title{color:#E8456B;font-size:.85rem;margin-bottom:10px}
.expert-card p{color:#666;font-size:.85rem;margin-bottom:15px}
.expert-btns{display:flex;gap:10px;justify-content:center}
.expert-btns a{padding:6px 16px;border-radius:20px;font-size:.82rem;font-weight:600}
.btn-sm-primary{background:linear-gradient(135deg,#E8456B,#FF7E5F);color:#fff}
.btn-sm-outline{border:1px solid #E8456B;color:#E8456B}
.btn-sm-outline:hover{background:#E8456B;color:#fff}

/* Partner Section */
.partner-section{padding:60px 0}
.partner-logos{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-logos .partner-item{background:#fff;padding:15px 25px;border-radius:10px;box-shadow:0 2px 10px rgba(0,0,0,.06);font-size:1rem;font-weight:700;color:#1A1A2E;transition:all .3s}
.partner-logos .partner-item:hover{box-shadow:0 4px 15px rgba(232,69,107,.15);transform:translateY(-2px)}

/* Review Section */
.review-section{padding:60px 0;background:#fff}
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.review-card{background:#F8F0F4;border-radius:12px;padding:25px;position:relative}
.review-card::before{content:'\201C';font-size:3rem;color:#E8456B;opacity:.3;position:absolute;top:10px;left:15px;font-family:serif}
.review-stars{color:#FFD700;margin-bottom:10px;font-size:.9rem}
.review-card p{color:#555;font-size:.92rem;margin-bottom:12px;padding-left:20px}
.review-author{display:flex;align-items:center;gap:10px;padding-left:20px}
.review-author strong{color:#1A1A2E;font-size:.9rem}
.review-author span{color:#999;font-size:.8rem}

/* FAQ Section */
.faq-section{padding:60px 0}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:10px;margin-bottom:12px;overflow:hidden;box-shadow:0 2px 10px rgba(0,0,0,.05)}
.faq-question{padding:18px 25px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:#1A1A2E;transition:background .3s}
.faq-question:hover{background:#FFF5F7}
.faq-question .faq-toggle{font-size:1.2rem;color:#E8456B;transition:transform .3s}
.faq-item.active .faq-toggle{transform:rotate(45deg)}
.faq-answer{padding:0 25px;max-height:0;overflow:hidden;transition:all .3s;color:#666;font-size:.92rem;line-height:1.7}
.faq-item.active .faq-answer{padding:0 25px 18px;max-height:300px}

/* Contact Section */
.contact-section{padding:60px 0;background:#fff}
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.contact-info{display:flex;flex-direction:column;gap:20px}
.contact-item{display:flex;gap:15px;align-items:flex-start}
.contact-item .ci-icon{flex-shrink:0;width:45px;height:45px;background:linear-gradient(135deg,#E8456B,#FF7E5F);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem}
.contact-item .ci-text h4{font-size:.95rem;margin-bottom:3px}
.contact-item .ci-text p{color:#666;font-size:.88rem}
.contact-qrcodes{display:flex;gap:20px;justify-content:center;align-items:flex-start}
.qrcode-box{text-align:center}
.qrcode-box img{width:160px;height:160px;border-radius:8px;margin-bottom:8px}
.qrcode-box p{font-size:.82rem;color:#666}

/* How-To Section */
.howto-section{padding:60px 0}
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.howto-step{text-align:center;padding:25px 15px}
.step-num{width:50px;height:50px;background:linear-gradient(135deg,#E8456B,#FF7E5F);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.3rem;font-weight:700;margin:0 auto 15px}
.howto-step h4{font-size:1rem;margin-bottom:8px}
.howto-step p{color:#666;font-size:.85rem}

/* Share Section */
.share-bar{background:#F8F0F4;padding:20px 0;text-align:center}
.share-bar h4{font-size:1rem;margin-bottom:12px;color:#1A1A2E}
.share-links{display:flex;justify-content:center;gap:15px}
.share-links a{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:.9rem;transition:all .3s}
.share-links a:hover{transform:translateY(-3px)}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#1A1A2E}
.share-bilibili{background:#00A1D6}

/* Footer */
.site-footer{background:#1A1A2E;color:rgba(255,255,255,.7);padding:40px 0 20px}
.footer-top{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.footer-brand img{height:36px;margin-bottom:12px}
.footer-brand p{font-size:.85rem;line-height:1.6}
.footer-links h4,.footer-contact h4{color:#fff;font-size:1rem;margin-bottom:12px;position:relative;padding-bottom:8px}
.footer-links h4::after,.footer-contact h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:linear-gradient(135deg,#E8456B,#FF7E5F)}
.footer-links a{display:block;color:rgba(255,255,255,.6);font-size:.88rem;padding:4px 0;transition:color .3s}
.footer-links a:hover{color:#FF7E5F}
.footer-contact p{font-size:.85rem;margin-bottom:6px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;display:flex;justify-content:space-between;align-items:center;font-size:.82rem}
.footer-bottom .update-time{color:rgba(255,255,255,.5)}

/* Breadcrumb */
.breadcrumb{padding:12px 0;font-size:.85rem;color:#999}
.breadcrumb a{color:#E8456B}
.breadcrumb span{margin:0 8px;color:#ccc}

/* Page Header */
.page-header{background:linear-gradient(135deg,#1A1A2E,#2D2D4E);padding:50px 0;text-align:center;color:#fff}
.page-header h1{font-size:2.2rem;margin-bottom:10px;color:#fff}
.page-header p{color:rgba(255,255,255,.7);font-size:1rem}

/* News/Update Section */
.news-section{padding:60px 0;background:#fff}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}
.news-card{background:#F8F0F4;border-radius:12px;overflow:hidden;transition:all .3s}
.news-card:hover{box-shadow:0 8px 25px rgba(232,69,107,.12);transform:translateY(-3px)}
.news-card .news-img{height:180px;overflow:hidden}
.news-card .news-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.news-card:hover .news-img img{transform:scale(1.05)}
.news-card .news-body{padding:18px}
.news-card .news-body h3{font-size:1rem;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card .news-body p{color:#666;font-size:.85rem;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.news-card .news-date{color:#E8456B;font-size:.78rem;font-weight:600}

/* H5 Video Card Enhancement */
.video-thumb video{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover}
.video-thumb .video-poster{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .4s;z-index:1}
.video-card:hover .video-thumb .video-poster{transform:scale(1.05)}
.play-btn{z-index:2}
.video-duration{z-index:2}

/* Credential/Certificate Section */
.credential-section{padding:60px 0}
.credential-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.credential-card{text-align:center;background:#fff;border-radius:12px;padding:25px 15px;box-shadow:0 4px 15px rgba(0,0,0,.06);transition:all .3s}
.credential-card:hover{box-shadow:0 8px 25px rgba(232,69,107,.12);transform:translateY(-3px)}
.credential-card .cred-icon{width:60px;height:60px;background:linear-gradient(135deg,#FFD700,#FFA500);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-size:1.5rem}
.credential-card h4{font-size:.95rem;margin-bottom:6px;color:#1A1A2E}
.credential-card p{color:#666;font-size:.82rem}

/* EEAT Trust Badge */
.trust-badges{display:flex;justify-content:center;gap:30px;flex-wrap:wrap;margin-top:30px}
.trust-badge{display:flex;align-items:center;gap:8px;background:#fff;padding:10px 20px;border-radius:25px;box-shadow:0 2px 10px rgba(0,0,0,.06);font-size:.85rem;color:#1A1A2E;font-weight:600}
.trust-badge .badge-icon{width:30px;height:30px;background:linear-gradient(135deg,#E8456B,#FF7E5F);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:.8rem}

/* Lazy Load */
img[data-src]{opacity:0;transition:opacity .5s}
img.loaded{opacity:1}

/* Responsive */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .ent-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .credential-grid{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .header-inner{flex-wrap:wrap}
  .main-nav{display:none;width:100%;flex-direction:column;background:#1A1A2E;position:absolute;top:100%;left:0;padding:10px 0}
  .main-nav.active{display:flex}
  .mobile-menu-btn{display:block}
  .hero-section{height:360px}
  .hero-content h1{font-size:1.8rem}
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .service-grid{grid-template-columns:1fr}
  .ent-grid{grid-template-columns:1fr 1fr}
  .ai-grid{grid-template-columns:1fr}
  .comm-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .credential-grid{grid-template-columns:repeat(2,1fr)}
  .trust-badges{gap:15px}
  .howto-steps{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:10px;text-align:center}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .ent-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .credential-grid{grid-template-columns:1fr}
  .hero-btns{flex-direction:column;align-items:flex-start}
  .trust-badges{flex-direction:column;align-items:center}
}

/* Certificate / Credential Grid (About Page) */
.cert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}
.cert-card{background:#fff;border-radius:12px;padding:30px 25px;text-align:center;box-shadow:0 2px 15px rgba(0,0,0,.06);border:1px solid #f0e0e8;transition:transform .3s,box-shadow .3s}
.cert-card:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(232,69,107,.12)}
.cert-card .cert-icon{font-size:2.5rem;margin-bottom:12px}
.cert-card h4{font-size:1.05rem;color:#1A1A2E;margin-bottom:8px}
.cert-card p{font-size:.88rem;color:#666;line-height:1.6}

/* Video Poster overlay for H5 video cards */
.video-thumb{position:relative;overflow:hidden;border-radius:10px 10px 0 0}
.video-thumb video{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;z-index:0}
.video-thumb .video-poster{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;z-index:1}

/* Responsive for cert-grid */
@media(max-width:768px){
  .cert-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:480px){
  .cert-grid{grid-template-columns:1fr}
}