/* ========================================
   糖心vlog - 原创样式表
   品牌定位：影视传媒公司 + 视频社区
   配色：甜蜜粉 #FF6B9D / 深玫红 #C44569 / 暖金 #F8B500
   ======================================== */

/* --- 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","Hiragino Sans GB","Microsoft YaHei","WenQuanYi Micro Hei",sans-serif;color:#2D2D3A;background:#FFF8FA;line-height:1.7;overflow-x:hidden}
a{color:#C44569;text-decoration:none;transition:color .3s}
a:hover{color:#FF6B9D}
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-padding{padding:60px 0}

/* --- Header / Navigation --- */
.site-header{background:#1A1A2E;position:sticky;top:0;z-index:1000;box-shadow:0 2px 20px rgba(0,0,0,.15)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:0 20px;max-width:1200px;margin:0 auto;height:68px}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{height:42px;width:auto}
.logo-text{font-size:1.3rem;font-weight:800;background:linear-gradient(135deg,#FF6B9D,#F8B500);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:1px}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{color:#fff;padding:8px 16px;border-radius:8px;font-size:.9rem;transition:all .3s;white-space:nowrap}
.main-nav a:hover,.main-nav a.active{background:linear-gradient(135deg,#FF6B9D,#C44569);color:#fff}

/* --- Search Bar --- */
.search-bar{background:linear-gradient(135deg,#C44569,#FF6B9D);padding:12px 0}
.search-wrap{max-width:600px;margin:0 auto;display:flex;gap:0;border-radius:30px;overflow:hidden;box-shadow:0 4px 15px rgba(255,107,157,.3)}
.search-wrap input{flex:1;border:none;padding:12px 24px;font-size:.95rem;outline:none;background:#fff;color:#2D2D3A}
.search-wrap input::placeholder{color:#aaa}
.search-wrap button{background:#F8B500;border:none;padding:12px 28px;color:#1A1A2E;font-weight:700;cursor:pointer;font-size:.95rem;transition:background .3s}
.search-wrap button:hover{background:#e5a600}

/* --- Hero Banner --- */
.hero-section{position:relative;overflow:hidden;background:#1A1A2E}
.hero-bg{width:100%;height:480px;object-fit:cover;opacity:.7}
.hero-overlay{position:absolute;top:0;left:0;right:0;bottom:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:20px;background:linear-gradient(180deg,rgba(26,26,46,.3),rgba(26,26,46,.7))}
.hero-overlay h1{font-size:2.8rem;color:#fff;margin-bottom:16px;text-shadow:0 2px 10px rgba(0,0,0,.3)}
.hero-overlay h1 span{background:linear-gradient(135deg,#FF6B9D,#F8B500);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-overlay p{color:rgba(255,255,255,.9);font-size:1.15rem;max-width:680px;margin-bottom:24px}
.hero-btn{display:inline-block;background:linear-gradient(135deg,#FF6B9D,#C44569);color:#fff;padding:14px 40px;border-radius:30px;font-size:1rem;font-weight:600;transition:transform .3s,box-shadow .3s;box-shadow:0 4px 20px rgba(255,107,157,.4)}
.hero-btn:hover{transform:translateY(-2px);box-shadow:0 6px 30px rgba(255,107,157,.6);color:#fff}

/* --- Section Titles --- */
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:2rem;margin-bottom:10px;position:relative;display:inline-block}
.section-title h2::after{content:"";display:block;width:60px;height:4px;background:linear-gradient(135deg,#FF6B9D,#F8B500);margin:12px auto 0;border-radius:2px}
.section-title p{color:#6B6B80;font-size:1rem;margin-top:8px}

/* --- Video Card Grid --- */
.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,.06);transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(255,107,157,.15)}
.video-thumb{position:relative;overflow:hidden;aspect-ratio:16/9}
.video-thumb img{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(255,107,157,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s,transform .3s}
.video-card:hover .play-btn{opacity:1}
.play-btn::after{content:"";display:block;width:0;height:0;border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:4px}
.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 16px}
.video-info h3{font-size:.95rem;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;align-items:center;gap:12px;color:#6B6B80;font-size:.8rem}
.video-meta span{display:flex;align-items:center;gap:4px}
.tag-list{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.tag-list span{background:#FFF0F5;color:#C44569;padding:2px 10px;border-radius:12px;font-size:.75rem}

/* --- Service Cards --- */
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.service-card{background:#fff;border-radius:16px;padding:36px 28px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.05);transition:transform .3s,box-shadow .3s;border:1px solid rgba(255,107,157,.08)}
.service-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(255,107,157,.12)}
.service-icon{width:72px;height:72px;margin:0 auto 20px;background:linear-gradient(135deg,#FFF0F5,#FFF5E6);border-radius:20px;display:flex;align-items:center;justify-content:center;font-size:2rem}
.service-card h3{font-size:1.15rem;margin-bottom:10px;color:#1A1A2E}
.service-card p{color:#6B6B80;font-size:.9rem;line-height:1.6}

/* --- AI Feature Section --- */
.ai-section{background:#1A1A2E;color:#fff}
.ai-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.ai-content h2{font-size:2rem;margin-bottom:16px;color:#fff}
.ai-content h2 span{color:#F8B500}
.ai-content p{color:rgba(255,255,255,.8);margin-bottom:20px;line-height:1.8}
.ai-features{display:flex;flex-direction:column;gap:14px}
.ai-feat-item{display:flex;align-items:center;gap:12px;background:rgba(255,255,255,.06);padding:14px 18px;border-radius:12px;border:1px solid rgba(255,107,157,.15)}
.ai-feat-item .feat-icon{width:40px;height:40px;background:linear-gradient(135deg,#FF6B9D,#F8B500);border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:1.2rem}
.ai-feat-item .feat-text h4{font-size:.95rem;color:#fff;margin-bottom:2px}
.ai-feat-item .feat-text p{font-size:.82rem;color:rgba(255,255,255,.6);margin:0}
.ai-image{border-radius:16px;overflow:hidden;box-shadow:0 8px 40px rgba(255,107,157,.2)}
.ai-image img{width:100%;display:block}

/* --- Community Section --- */
.community-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.community-card{background:#fff;border-radius:14px;padding:24px 20px;text-align:center;box-shadow:0 3px 15px rgba(0,0,0,.05);transition:all .3s;border:2px solid transparent}
.community-card:hover{border-color:#FF6B9D;transform:translateY(-3px)}
.community-card .comm-icon{font-size:2.2rem;margin-bottom:12px}
.community-card h4{font-size:1rem;margin-bottom:6px}
.community-card p{color:#6B6B80;font-size:.82rem}

/* --- Expert Section --- */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-avatar{width:100%;aspect-ratio:1;background:linear-gradient(135deg,#FFF0F5,#FFF5E6);display:flex;align-items:center;justify-content:center;font-size:3rem}
.expert-info{padding:18px 16px;text-align:center}
.expert-info h4{font-size:1rem;margin-bottom:4px}
.expert-info .expert-role{color:#C44569;font-size:.82rem;margin-bottom:8px}
.expert-info p{color:#6B6B80;font-size:.8rem;margin-bottom:12px}
.expert-btns{display:flex;gap:8px;justify-content:center}
.expert-btns a{padding:6px 14px;border-radius:20px;font-size:.78rem;transition:all .3s}
.btn-contact{background:linear-gradient(135deg,#FF6B9D,#C44569);color:#fff}
.btn-works{background:#FFF0F5;color:#C44569}
.btn-works:hover{background:#C44569;color:#fff}

/* --- Partner Logos --- */
.partner-logos{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-logo{width:140px;height:60px;background:#fff;border-radius:12px;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 10px rgba(0,0,0,.05);padding:10px;color:#6B6B80;font-size:.85rem;font-weight:600;border:1px solid #f0f0f0;transition:all .3s}
.partner-logo:hover{box-shadow:0 4px 20px rgba(255,107,157,.15);border-color:#FF6B9D}

/* --- Reviews --- */
.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,.05)}
.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,#FF6B9D,#F8B500);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.1rem}
.review-name h4{font-size:.95rem;margin-bottom:2px}
.review-name span{color:#6B6B80;font-size:.8rem}
.review-stars{color:#F8B500;margin-bottom:10px;font-size:.9rem}
.review-text{color:#4a4a5a;font-size:.9rem;line-height:1.7;font-style:italic}

/* --- FAQ --- */
.faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 10px rgba(0,0,0,.04)}
.faq-question{padding:18px 24px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .3s;font-size:.95rem}
.faq-question:hover{background:#FFF0F5}
.faq-arrow{transition:transform .3s;font-size:1.2rem;color:#C44569}
.faq-item.active .faq-arrow{transform:rotate(180deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all .4s ease;color:#6B6B80;font-size:.9rem;line-height:1.7}
.faq-item.active .faq-answer{padding:0 24px 18px;max-height:500px}

/* --- Contact Section --- */
.contact-section{background:linear-gradient(135deg,#1A1A2E,#2D2D3A)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;color:#fff}
.contact-info h3{font-size:1.4rem;margin-bottom:20px;color:#fff}
.contact-item{display:flex;align-items:flex-start;gap:14px;margin-bottom:18px}
.contact-icon{width:44px;height:44px;background:linear-gradient(135deg,#FF6B9D,#C44569);border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:1.1rem}
.contact-text h4{font-size:.9rem;color:#fff;margin-bottom:2px}
.contact-text p{color:rgba(255,255,255,.7);font-size:.85rem}
.qrcode-wrap{display:flex;gap:30px;justify-content:center;align-items:flex-start}
.qrcode-item{text-align:center}
.qrcode-item img{width:160px;height:160px;border-radius:12px;margin-bottom:8px;background:#fff;padding:8px}
.qrcode-item p{color:rgba(255,255,255,.8);font-size:.85rem}

/* --- How To Join --- */
.howto-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:30px}
.howto-step{text-align:center;position:relative}
.step-num{width:48px;height:48px;background:linear-gradient(135deg,#FF6B9D,#C44569);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.2rem;margin:0 auto 14px}
.howto-step h4{font-size:1rem;margin-bottom:6px}
.howto-step p{color:#6B6B80;font-size:.85rem}

/* --- Social Share --- */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:25px;color:#fff;font-size:.85rem;font-weight:500;transition:transform .3s,box-shadow .3s}
.share-btn:hover{transform:translateY(-2px);box-shadow:0 4px 15px rgba(0,0,0,.2);color:#fff}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#161823}
.share-bilibili{background:#00A1D6}

/* --- Footer --- */
.site-footer{background:#0D0D1A;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 .logo-text{font-size:1.2rem;margin-bottom:10px}
.footer-brand p{font-size:.85rem;line-height:1.6;color:rgba(255,255,255,.5)}
.footer-links h4{color:#fff;font-size:.95rem;margin-bottom:14px}
.footer-links a{display:block;color:rgba(255,255,255,.5);font-size:.85rem;margin-bottom:8px;transition:color .3s}
.footer-links a:hover{color:#FF6B9D}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:20px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;font-size:.82rem;color:rgba(255,255,255,.4)}

/* --- Breadcrumb --- */
.breadcrumb{padding:14px 0;font-size:.85rem;color:#6B6B80}
.breadcrumb a{color:#C44569}
.breadcrumb span{margin:0 6px;color:#ccc}

/* --- Inner Page Hero --- */
.inner-hero{background:linear-gradient(135deg,#1A1A2E,#2D2D3A);padding:50px 0;text-align:center;color:#fff}
.inner-hero h1{font-size:2.2rem;margin-bottom:10px}
.inner-hero p{color:rgba(255,255,255,.7);font-size:1rem}

/* --- Responsive --- */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .service-grid{grid-template-columns:repeat(2,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .ai-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .header-inner{flex-wrap:wrap;height:auto;padding:10px 16px}
  .main-nav{flex-wrap:wrap;gap:4px;justify-content:center;padding:8px 0}
  .main-nav a{padding:6px 12px;font-size:.82rem}
  .hero-bg{height:320px}
  .hero-overlay h1{font-size:1.8rem}
  .hero-overlay p{font-size:.95rem}
  .video-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .service-grid{grid-template-columns:1fr}
  .community-grid{grid-template-columns:repeat(2,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .howto-grid{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr}
  .section-padding{padding:40px 0}
  .section-title h2{font-size:1.6rem}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .community-grid{grid-template-columns:1fr}
  .howto-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
}

/* --- Lazy Load --- */
img[data-src]{opacity:0;transition:opacity .4s}
img.loaded{opacity:1}

/* --- Mobile Nav Toggle --- */
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}
@media(max-width:768px){
  .nav-toggle{display:block}
  .main-nav{display:none;width:100%}
  .main-nav.open{display:flex}
}

/* --- Video Card Badge --- */
.video-badge{position:absolute;top:10px;left:10px;background:linear-gradient(135deg,#FF6B9D,#C44569);color:#fff;padding:3px 10px;border-radius:12px;font-size:.72rem;font-weight:600;z-index:2}

/* --- Update Time --- */
.update-time{color:rgba(255,255,255,.4);font-size:.8rem}

/* --- Video Modal --- */
.video-modal{position:fixed;top:0;left:0;right:0;bottom:0;z-index:9999;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s}
.video-modal-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.75)}
.video-modal-content{position:relative;background:#1A1A2E;border-radius:16px;width:90%;max-width:720px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.video-modal-header{display:flex;justify-content:space-between;align-items:center;padding:18px 24px;border-bottom:1px solid rgba(255,255,255,.1)}
.video-modal-header h3{color:#fff;font-size:1.1rem}
.video-modal-close{background:none;border:none;color:#fff;font-size:1.8rem;cursor:pointer;opacity:.7;transition:opacity .3s}
.video-modal-close:hover{opacity:1}
.video-modal-body{padding:0}
.video-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:80px 20px;color:rgba(255,255,255,.6)}
.video-placeholder-icon{font-size:3rem;margin-bottom:16px;width:80px;height:80px;background:linear-gradient(135deg,#FF6B9D,#C44569);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff}
.video-placeholder p{font-size:1rem;margin-bottom:6px}
.video-placeholder-tip{font-size:.85rem;color:rgba(255,255,255,.4)}

/* --- Share Tip --- */
.share-tip{position:fixed;top:0;left:0;right:0;bottom:0;z-index:9999;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.6);opacity:0;transition:opacity .3s}
.share-tip-content{background:#fff;border-radius:16px;padding:30px;text-align:center;max-width:420px;width:90%}
.share-tip-content p{margin-bottom:14px;font-size:1rem;color:#2D2D3A}
.share-tip-content input{width:100%;padding:10px 14px;border:1px solid #ddd;border-radius:8px;font-size:.9rem;margin-bottom:14px;color:#2D2D3A}
.share-tip-close{background:linear-gradient(135deg,#FF6B9D,#C44569);color:#fff;border:none;padding:10px 30px;border-radius:25px;cursor:pointer;font-size:.9rem}

/* --- Scroll Animation --- */
.animate-on-scroll{opacity:0;transform:translateY(30px);transition:opacity .6s ease,transform .6s ease}
.animate-on-scroll.visible{opacity:1;transform:translateY(0)}

/* --- Filter Tags --- */
.filter-tags{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:40px}
.filter-tag{background:#fff;color:#2D2D3A;padding:8px 20px;border-radius:20px;font-size:.9rem;cursor:pointer;border:1px solid #eee;transition:all .3s}
.filter-tag:hover,.filter-tag.active{background:linear-gradient(135deg,#FF6B9D,#C44569);color:#fff;border-color:transparent}

/* --- Expert Grid 5 columns --- */
.expert-grid-5{grid-template-columns:repeat(5,1fr)}
@media(max-width:1024px){.expert-grid-5{grid-template-columns:repeat(3,1fr)}}
@media(max-width:768px){.expert-grid-5{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.expert-grid-5{grid-template-columns:1fr}}

/* --- Community Grid 6 columns --- */
.community-grid-6{grid-template-columns:repeat(3,1fr)}
@media(max-width:768px){.community-grid-6{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.community-grid-6{grid-template-columns:1fr}}

/* --- Header Scroll Effect --- */
.site-header.scrolled{box-shadow:0 4px 30px rgba(0,0,0,.25)}

/* --- Mobile Nav Show --- */
@media(max-width:768px){
  .main-nav.show{display:flex}
  .nav-toggle.active{color:#FF6B9D}
}

/* --- Video Description --- */
.video-desc{color:#6B6B80;font-size:.82rem;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* --- Card Video Element --- */
.card-video{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;z-index:0}
.thumb-img{position:relative;z-index:1}