/* ============================================
   糖心vlog - 原创样式表
   品牌定位：影视传媒公司 + 视频社区
   配色：甜蜜粉紫系
   ============================================ */

/* --- CSS 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:#2D1B3D;background:#F8F0FC;line-height:1.7;overflow-x:hidden}
a{color:#E84393;text-decoration:none;transition:color .3s}
a:hover{color:#6C5CE7}
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:#1A1025}

/* --- Layout Utilities --- */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.flex{display:flex;flex-wrap:wrap}
.flex-center{display:flex;align-items:center;justify-content:center}
.text-center{text-align:center}
.section-gap{padding:60px 0}

/* --- Header & Navigation --- */
.site-header{background:linear-gradient(135deg,#1A1025 0%,#2D1B3D 100%);position:sticky;top:0;z-index:1000;box-shadow:0 2px 20px rgba(232,67,147,.2)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;max-width:1200px;margin:0 auto}
.site-logo{display:flex;align-items:center;gap:10px}
.site-logo img{height:42px;width:auto}
.site-logo span{color:#fff;font-size:1.3rem;font-weight:700;letter-spacing:1px}
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{color:rgba(255,255,255,.85);padding:10px 16px;font-size:.95rem;transition:all .3s;border-radius:6px}
.main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(232,67,147,.25)}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer;padding:8px}

/* --- Search Bar --- */
.search-bar{background:linear-gradient(90deg,#E84393,#6C5CE7);padding:14px 0}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;max-width:600px;width:100%;background:#fff;border-radius:30px;overflow:hidden;box-shadow:0 4px 15px rgba(108,92,231,.2)}
.search-box input{flex:1;border:none;padding:12px 24px;font-size:1rem;outline:none;color:#2D1B3D;background:transparent}
.search-box input::placeholder{color:#7B6B8A}
.search-box button{background:linear-gradient(135deg,#E84393,#6C5CE7);color:#fff;border:none;padding:12px 28px;cursor:pointer;font-size:.95rem;transition:opacity .3s}
.search-box button:hover{opacity:.85}

/* --- Hero Banner --- */
.hero-section{position:relative;overflow:hidden;background:#1A1025}
.hero-section .hero-bg{width:100%;height:480px;object-fit:cover;opacity:.7}
.hero-overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:20px;background:linear-gradient(180deg,rgba(26,16,37,.3) 0%,rgba(26,16,37,.7) 100%)}
.hero-overlay h1{color:#fff;font-size:2.6rem;margin-bottom:12px;text-shadow:0 2px 10px rgba(232,67,147,.5)}
.hero-overlay p{color:rgba(255,255,255,.9);font-size:1.15rem;max-width:650px;margin-bottom:24px}
.hero-overlay .hero-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.hero-overlay .hero-tags span{background:rgba(232,67,147,.3);color:#fff;padding:6px 18px;border-radius:20px;font-size:.85rem;backdrop-filter:blur(4px)}
.btn-primary{display:inline-block;background:linear-gradient(135deg,#E84393,#6C5CE7);color:#fff;padding:12px 36px;border-radius:30px;font-size:1rem;font-weight:600;transition:transform .3s,box-shadow .3s;border:none;cursor:pointer}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(232,67,147,.4);color:#fff}

/* --- Section Titles --- */
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:2rem;color:#1A1025;margin-bottom:8px}
.section-title h2 em{font-style:normal;color:#E84393}
.section-title p{color:#7B6B8A;font-size:1rem}
.section-title .line{width:60px;height:3px;background:linear-gradient(90deg,#E84393,#6C5CE7);margin:12px auto 0;border-radius:2px}

/* --- Video Card Grid --- */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.video-card{background:#fff;border-radius:14px;overflow:hidden;box-shadow:0 4px 16px rgba(26,16,37,.08);transition:transform .3s,box-shadow .3s}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 32px rgba(232,67,147,.15)}
.video-card .thumb{position:relative;overflow:hidden;aspect-ratio:16/9}
.video-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .thumb img{transform:scale(1.05)}
.video-card .play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(26,16,37,.4);opacity:0;transition:opacity .3s}
.video-card:hover .play-btn{opacity:1}
.video-card .play-btn svg{width:56px;height:56px;fill:#fff;filter:drop-shadow(0 2px 8px rgba(0,0,0,.3))}
.video-card .card-body{padding:14px 16px}
.video-card .card-body h3{font-size:.95rem;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-card .card-meta{display:flex;align-items:center;gap:12px;color:#7B6B8A;font-size:.8rem}
.video-card .card-meta span{display:flex;align-items:center;gap:3px}
.video-card .tag{display:inline-block;background:rgba(232,67,147,.1);color:#E84393;padding:2px 10px;border-radius:10px;font-size:.75rem;margin-top:6px}

/* --- Service Section --- */
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.service-item{background:#fff;border-radius:16px;padding:30px 24px;text-align:center;box-shadow:0 4px 16px rgba(26,16,37,.06);transition:transform .3s}
.service-item:hover{transform:translateY(-4px)}
.service-item img{width:100%;border-radius:10px;margin-bottom:16px;aspect-ratio:16/9;object-fit:cover}
.service-item h3{font-size:1.1rem;margin-bottom:8px;color:#1A1025}
.service-item p{color:#7B6B8A;font-size:.9rem;line-height:1.6}

/* --- Expert Section --- */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:#fff;border-radius:16px;padding:28px 20px;text-align:center;box-shadow:0 4px 16px rgba(26,16,37,.06);transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-card .avatar{width:100px;height:100px;border-radius:50%;object-fit:cover;margin:0 auto 14px;border:3px solid #E84393}
.expert-card h4{font-size:1.05rem;margin-bottom:4px}
.expert-card .role{color:#E84393;font-size:.85rem;margin-bottom:8px}
.expert-card p{color:#7B6B8A;font-size:.85rem;line-height:1.5;margin-bottom:12px}
.expert-card .btn-sm{display:inline-block;padding:6px 18px;border:1px solid #E84393;color:#E84393;border-radius:20px;font-size:.8rem;transition:all .3s}
.expert-card .btn-sm:hover{background:#E84393;color:#fff}

/* --- Partner Wall --- */
.partner-section{background:#fff}
.partner-img{max-width:900px;margin:0 auto;border-radius:12px}

/* --- 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(26,16,37,.06)}
.review-card .stars{color:#FD79A8;font-size:1.1rem;margin-bottom:8px}
.review-card blockquote{color:#2D1B3D;font-size:.95rem;line-height:1.7;margin-bottom:12px;font-style:italic}
.review-card .reviewer{display:flex;align-items:center;gap:10px}
.review-card .reviewer .r-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#E84393,#6C5CE7);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.9rem}
.review-card .reviewer .r-info span{display:block}
.review-card .reviewer .r-info .r-name{font-weight:600;font-size:.9rem}
.review-card .reviewer .r-info .r-date{color:#7B6B8A;font-size:.8rem}

/* --- FAQ --- */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:12px;margin-bottom:14px;overflow:hidden;box-shadow:0 2px 10px rgba(26,16,37,.05)}
.faq-item .faq-q{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:1rem;transition:background .3s}
.faq-item .faq-q:hover{background:rgba(232,67,147,.05)}
.faq-item .faq-q .arrow{transition:transform .3s;color:#E84393;font-size:1.2rem}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-item .faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease;color:#7B6B8A;font-size:.95rem;line-height:1.7}
.faq-item.open .faq-a{max-height:300px;padding:0 24px 18px}

/* --- Contact Section --- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-info{background:#fff;border-radius:16px;padding:32px;box-shadow:0 4px 16px rgba(26,16,37,.06)}
.contact-info h3{font-size:1.2rem;margin-bottom:16px;color:#1A1025}
.contact-info .info-row{display:flex;align-items:flex-start;gap:12px;margin-bottom:14px;color:#2D1B3D;font-size:.95rem}
.contact-info .info-row .icon{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#E84393,#6C5CE7);display:flex;align-items:center;justify-content:center;color:#fff;font-size:.9rem;flex-shrink:0}
.contact-qr{display:flex;gap:24px;justify-content:center}
.contact-qr .qr-item{text-align:center}
.contact-qr .qr-item img{width:160px;height:160px;border-radius:10px;margin-bottom:8px}
.contact-qr .qr-item span{font-size:.85rem;color:#7B6B8A}

/* --- Community Section --- */
.community-features{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.community-card{background:#fff;border-radius:14px;padding:24px;text-align:center;box-shadow:0 4px 16px rgba(26,16,37,.06);transition:transform .3s}
.community-card:hover{transform:translateY(-4px)}
.community-card .icon-circle{width:60px;height:60px;border-radius:50%;background:linear-gradient(135deg,#E84393,#6C5CE7);display:flex;align-items:center;justify-content:center;margin:0 auto 14px;color:#fff;font-size:1.4rem}
.community-card h4{font-size:1rem;margin-bottom:6px}
.community-card p{color:#7B6B8A;font-size:.85rem}

/* --- Footer --- */
.site-footer{background:linear-gradient(135deg,#1A1025 0%,#2D1B3D 100%);color:rgba(255,255,255,.7);padding:40px 0 20px}
.footer-inner{display:grid;grid-template-columns:1fr 1fr 1fr;gap:40px;margin-bottom:30px}
.footer-col h4{color:#fff;font-size:1rem;margin-bottom:14px}
.footer-col p,.footer-col a{color:rgba(255,255,255,.6);font-size:.9rem;line-height:1.8}
.footer-col a:hover{color:#FD79A8}
.footer-col .footer-links a{display:block;padding:2px 0}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.footer-logo img{border-radius:8px}
.footer-logo h4{margin-bottom:0}
.footer-qr{display:flex;gap:16px}
.footer-qr .qr-item{text-align:center}
.footer-qr .qr-item img{width:110px;height:110px;border-radius:8px;margin-bottom:6px}
.footer-qr .qr-item span{font-size:.8rem;color:rgba(255,255,255,.5)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:18px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px}
.footer-bottom p{font-size:.85rem}
.footer-bottom .social-links{display:flex;gap:12px}
.footer-bottom .social-links a{width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;color:#fff;font-size:.85rem;transition:background .3s}
.footer-bottom .social-links a:hover{background:#E84393}

/* --- Share Buttons --- */
.share-bar{display:flex;gap:10px;justify-content:center;margin-top:20px}
.share-bar a{display:flex;align-items:center;gap:6px;padding:8px 16px;border-radius:20px;font-size:.85rem;color:#fff;transition:opacity .3s}
.share-bar a:hover{opacity:.85;color:#fff}
.share-bar .s-wechat{background:#07C160}
.share-bar .s-weibo{background:#E6162D}
.share-bar .s-douyin{background:#161823}
.share-bar .s-bilibili{background:#00A1D6}

/* --- Breadcrumb --- */
.breadcrumb{padding:12px 0;font-size:.85rem;color:#7B6B8A}
.breadcrumb a{color:#E84393}
.breadcrumb span{margin:0 6px}

/* --- AI Section --- */
.ai-features{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center}
.ai-features .ai-img{border-radius:14px;overflow:hidden}
.ai-features .ai-img img{width:100%;aspect-ratio:16/9;object-fit:cover}
.ai-features .ai-text h3{font-size:1.3rem;margin-bottom:12px;color:#1A1025}
.ai-features .ai-text p{color:#7B6B8A;font-size:.95rem;margin-bottom:10px}
.ai-features .ai-text ul{padding-left:0}
.ai-features .ai-text ul li{padding:4px 0;color:#2D1B3D;font-size:.9rem;position:relative;padding-left:20px}
.ai-features .ai-text ul li::before{content:"";position:absolute;left:0;top:12px;width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,#E84393,#6C5CE7)}

/* --- How-To Guide --- */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:30px}
.howto-step{text-align:center;padding:24px 16px;background:#fff;border-radius:14px;box-shadow:0 4px 16px rgba(26,16,37,.06)}
.howto-step .step-num{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,#E84393,#6C5CE7);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.2rem;font-weight:700;margin:0 auto 12px}
.howto-step h4{font-size:.95rem;margin-bottom:6px}
.howto-step p{color:#7B6B8A;font-size:.85rem}

/* --- Inner Page Banner --- */
.page-banner{position:relative;height:300px;overflow:hidden;background:#1A1025}
.page-banner img{width:100%;height:100%;object-fit:cover;opacity:.6}
.page-banner .banner-text{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:#fff}
.page-banner .banner-text h1{font-size:2.2rem;margin-bottom:8px;text-shadow:0 2px 10px rgba(0,0,0,.3)}
.page-banner .banner-text p{font-size:1rem;opacity:.85}

/* --- Inner Page Content --- */
.page-content{padding:40px 0}
.page-content h2{font-size:1.6rem;margin-bottom:16px;color:#1A1025}
.page-content h3{font-size:1.2rem;margin-bottom:12px;color:#2D1B3D}
.page-content p{margin-bottom:14px;color:#2D1B3D;font-size:.95rem;line-height:1.8}

/* --- Responsive --- */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .service-grid{grid-template-columns:repeat(2,1fr)}
  .howto-steps{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr 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}
  .main-nav a{padding:10px 16px;width:100%}
  .nav-toggle{display:block}
  .hero-overlay h1{font-size:1.8rem}
  .hero-section .hero-bg{height:320px}
  .video-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .service-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .ai-features{grid-template-columns:1fr}
  .community-features{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  .section-gap{padding:40px 0}
  .howto-steps{grid-template-columns:1fr}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .search-box{flex-direction:column}
  .search-box button{border-radius:0 0 30px 30px}
}

/* --- Lazy Load Placeholder --- */
.lazy{opacity:1;transition:opacity .5s}
.lazy.loaded{opacity:1}

/* --- Utility Classes --- */
.bg-white{background:#fff}
.share-desc{color:#7B6B8A;margin-bottom:16px}
.hidden-service{display:none}
.mt-30{margin-top:30px}
.mt-40{margin-top:40px}

/* --- Video Modal Player --- */
.video-modal{position:fixed;inset:0;z-index:9999;display:none;align-items:center;justify-content:center}
.video-modal.active{display:flex}
.video-modal-overlay{position:absolute;inset:0;background:rgba(26,16,37,.85);backdrop-filter:blur(6px)}
.video-modal-content{position:relative;width:90%;max-width:800px;z-index:1;background:#1A1025;border-radius:16px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.video-modal-close{position:absolute;top:12px;right:16px;background:none;border:none;color:#fff;font-size:2rem;cursor:pointer;z-index:2;line-height:1;transition:color .3s}
.video-modal-close:hover{color:#E84393}
.video-modal-title{padding:16px 50px 12px 20px;color:#fff;font-size:1.1rem;font-weight:700}
.video-modal-player{width:100%;aspect-ratio:16/9;background:#000;display:block}
.video-modal-info{padding:14px 20px}
.video-modal-desc{color:rgba(255,255,255,.6);font-size:.85rem;line-height:1.6}

/* --- Back to Top --- */
.back-to-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#E84393,#6C5CE7);color:#fff;border:none;font-size:1.2rem;cursor:pointer;opacity:0;visibility:hidden;transition:all .3s;box-shadow:0 4px 12px rgba(232,67,147,.3);z-index:999}
.back-to-top.visible{opacity:1;visibility:visible}
.back-to-top:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(232,67,147,.5)}

/* --- Update Time --- */
.update-time{text-align:center;padding:10px;color:rgba(255,255,255,.5);font-size:.8rem}