/* ========================================
   糖心vlog - 原创样式表
   品牌色系：活力橙 #FF6B35 / 深邃蓝黑 #1A1A2E / 玫红 #E94560
   ======================================== */

/* 基础重置 */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:#2D2D3A;background:#F5F5F7;line-height:1.7;overflow-x:hidden}
a{color:#FF6B35;text-decoration:none;transition:color .3s}
a:hover{color:#E94560}
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}

/* 容器 */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section-title{text-align:center;margin-bottom:40px;position:relative}
.section-title h2{font-size:2rem;color:#1A1A2E;display:inline-block;position:relative}
.section-title h2::after{content:'';display:block;width:60px;height:4px;background:linear-gradient(90deg,#FF6B35,#E94560);margin:12px auto 0;border-radius:2px}
.section-title p{color:#666;margin-top:10px;font-size:1rem}

/* 头部导航 */
.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:0 20px;max-width:1200px;margin:0 auto;height:70px}
.site-logo{display:flex;align-items:center;gap:10px}
.site-logo img{height:45px;width:auto}
.site-logo span{color:#fff;font-size:1.3rem;font-weight:700}
.main-nav ul{display:flex;gap:5px}
.main-nav a{color:#ccc;padding:8px 16px;border-radius:6px;font-size:.95rem;transition:all .3s}
.main-nav a:hover,.main-nav a.active{color:#fff;background:linear-gradient(135deg,#FF6B35,#E94560)}
.mobile-menu-btn{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* 搜索框 */
.search-bar{background:linear-gradient(135deg,#1A1A2E 0%,#2D2D3A 100%);padding:15px 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(0,0,0,.1)}
.search-box input{flex:1;border:none;padding:12px 24px;font-size:1rem;outline:none;color:#2D2D3A}
.search-box button{background:linear-gradient(135deg,#FF6B35,#E94560);border:none;color:#fff;padding:12px 28px;cursor:pointer;font-size:1rem;transition:opacity .3s}
.search-box button:hover{opacity:.9}

/* Banner */
.hero-banner{position:relative;height:500px;overflow:hidden;background:#1A1A2E}
.hero-banner img{width:100%;height:100%;object-fit:cover;opacity:.7}
.hero-overlay{position:absolute;top:0;left:0;right:0;bottom:0;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:20px;background:linear-gradient(180deg,rgba(26,26,46,.3) 0%,rgba(26,26,46,.7) 100%)}
.hero-overlay h1{color:#fff;font-size:2.8rem;margin-bottom:15px;text-shadow:0 2px 10px rgba(0,0,0,.5)}
.hero-overlay p{color:#ddd;font-size:1.2rem;max-width:700px;line-height:1.8}
.hero-overlay .hero-tags{display:flex;gap:12px;margin-top:20px;flex-wrap:wrap;justify-content:center}
.hero-overlay .hero-tags span{background:rgba(255,107,53,.8);color:#fff;padding:6px 18px;border-radius:20px;font-size:.9rem}

/* 面包屑 */
.breadcrumb{padding:12px 0;font-size:.9rem;color:#888}
.breadcrumb a{color:#FF6B35}
.breadcrumb span{margin:0 8px;color:#ccc}

/* 视频卡片 */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px;padding:40px 0}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 30px rgba(0,0,0,.15)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden}
.video-thumb img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .video-thumb img{transform:scale(1.05)}
.video-play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;background:rgba(255,107,53,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;z-index:2}
.video-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 .video-play-btn{opacity:1}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:.8rem;z-index:2}
.video-info{padding:16px}
.video-info h3{font-size:1rem;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:.85rem}
.video-stats{display:flex;gap:12px}
.video-stats span{display:flex;align-items:center;gap:4px}

/* 模块区域 */
.section{padding:60px 0}
.section-alt{background:#fff}
.section-dark{background:#1A1A2E;color:#fff}
.section-dark h2,.section-dark h3{color:#fff}
.section-dark p{color:#ccc}

/* 娱乐专区 - 短视频风格 */
.short-video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.short-video-card{position:relative;border-radius:12px;overflow:hidden;padding-top:150%;background:#1A1A2E}
.short-video-card img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover}
.short-video-card .overlay{position:absolute;bottom:0;left:0;right:0;padding:15px;background:linear-gradient(transparent,rgba(0,0,0,.8));color:#fff}
.short-video-card .overlay h4{font-size:.95rem;margin-bottom:5px}
.short-video-card .overlay span{font-size:.8rem;opacity:.8}

/* AI赋能模块 */
.ai-features{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px}
.ai-card{background:#fff;border-radius:16px;padding:30px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:transform .3s}
.ai-card:hover{transform:translateY(-5px)}
.ai-card .ai-icon{width:70px;height:70px;margin:0 auto 20px;background:linear-gradient(135deg,#FF6B35,#E94560);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:2rem;color:#fff}
.ai-card h3{font-size:1.2rem;margin-bottom:10px}
.ai-card p{color:#666;font-size:.95rem}

/* 社区模块 */
.community-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:24px}
.community-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:transform .3s}
.community-card:hover{transform:translateY(-5px)}
.community-card img{width:100%;height:180px;object-fit:cover}
.community-card .card-body{padding:20px}
.community-card h3{font-size:1.1rem;margin-bottom:8px}
.community-card p{color:#666;font-size:.9rem}
.community-card .card-tag{display:inline-block;background:linear-gradient(135deg,#FF6B35,#E94560);color:#fff;padding:4px 12px;border-radius:12px;font-size:.8rem;margin-top:10px}

/* 专家展示 */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:30px}
.expert-card{background:#fff;border-radius:16px;padding:30px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:transform .3s}
.expert-card:hover{transform:translateY(-5px)}
.expert-card img{width:120px;height:120px;border-radius:50%;object-fit:cover;margin:0 auto 15px;border:4px solid #FF6B35}
.expert-card h3{font-size:1.15rem;margin-bottom:5px}
.expert-card .role{color:#FF6B35;font-size:.9rem;margin-bottom:10px}
.expert-card p{color:#666;font-size:.9rem;margin-bottom:15px}
.expert-card .expert-btn{display:inline-block;padding:8px 20px;border:2px solid #FF6B35;color:#FF6B35;border-radius:25px;font-size:.9rem;transition:all .3s}
.expert-card .expert-btn:hover{background:#FF6B35;color:#fff}

/* 用户评论 */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.review-card{background:#fff;border-radius:16px;padding:25px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:15px}
.review-avatar{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,#FF6B35,#E94560);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.1rem}
.review-name{font-weight:600}
.review-date{font-size:.8rem;color:#999}
.review-stars{color:#FF6B35;margin-bottom:10px;font-size:1.1rem}
.review-text{color:#555;font-size:.95rem;line-height:1.7}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:12px;margin-bottom:12px;box-shadow:0 2px 10px rgba(0,0,0,.05);overflow:hidden}
.faq-question{padding:20px 25px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:1.05rem;transition:background .3s}
.faq-question:hover{background:#f9f9f9}
.faq-question .arrow{transition:transform .3s;font-size:1.2rem;color:#FF6B35}
.faq-item.active .faq-question .arrow{transform:rotate(180deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 25px}
.faq-item.active .faq-answer{max-height:300px;padding:0 25px 20px}
.faq-answer p{color:#666;line-height:1.8}

/* 合作品牌 */
.partner-logos{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-logos img{height:50px;opacity:.6;transition:opacity .3s;filter:grayscale(100%)}
.partner-logos img:hover{opacity:1;filter:none}

/* How-To指南 */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px;margin-top:30px}
.howto-step{text-align:center;padding:30px 20px}
.howto-step .step-num{width:50px;height:50px;background:linear-gradient(135deg,#FF6B35,#E94560);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{margin-bottom:10px;font-size:1.05rem}
.howto-step p{color:#666;font-size:.9rem}

/* 联系我们 */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px}
.contact-card{background:#fff;border-radius:16px;padding:30px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.contact-card h3{margin-bottom:15px;font-size:1.15rem}
.contact-card p{color:#666;font-size:.95rem;margin-bottom:8px}
.contact-card .contact-icon{font-size:2.5rem;margin-bottom:15px;color:#FF6B35}

/* 社交分享 */
.share-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:25px;color:#fff;font-size:.9rem;transition:transform .3s}
.share-btn:hover{transform:scale(1.05);color:#fff}
.share-btn.wechat{background:#07C160}
.share-btn.weibo{background:#E6162D}
.share-btn.douyin{background:#161823}
.share-btn.bilibili{background:#00A1D6}

/* 页脚 */
.site-footer{background:#1A1A2E;color:#ccc;padding:50px 0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:30px;margin-bottom:30px}
.footer-col h4{color:#fff;margin-bottom:15px;font-size:1.1rem;position:relative;padding-bottom:10px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:3px;background:#FF6B35;border-radius:2px}
.footer-col p{margin-bottom:8px;font-size:.9rem}
.footer-col a{color:#ccc;font-size:.9rem;display:block;margin-bottom:6px;transition:color .3s}
.footer-col a:hover{color:#FF6B35}
.footer-col img{max-width:120px;border-radius:8px;margin-top:5px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;text-align:center;font-size:.85rem}
.footer-bottom p{margin-bottom:5px}

/* 回到顶部 */
.back-to-top{position:fixed;bottom:30px;right:30px;width:45px;height:45px;background:linear-gradient(135deg,#FF6B35,#E94560);color:#fff;border:none;border-radius:50%;cursor:pointer;font-size:1.2rem;display:none;align-items:center;justify-content:center;box-shadow:0 4px 15px rgba(255,107,53,.4);transition:transform .3s;z-index:999}
.back-to-top:hover{transform:scale(1.1)}
.back-to-top.show{display:flex}

/* 标签 */
.tag{display:inline-block;background:#f0f0f0;color:#666;padding:4px 12px;border-radius:15px;font-size:.8rem;margin:3px}
.tag-primary{background:rgba(255,107,53,.1);color:#FF6B35}

/* 按钮 */
.btn{display:inline-block;padding:12px 30px;border-radius:30px;font-size:1rem;font-weight:600;transition:all .3s;cursor:pointer;border:none}
.btn-primary{background:linear-gradient(135deg,#FF6B35,#E94560);color:#fff;box-shadow:0 4px 15px rgba(255,107,53,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(255,107,53,.4);color:#fff}
.btn-outline{border:2px solid #FF6B35;color:#FF6B35;background:transparent}
.btn-outline:hover{background:#FF6B35;color:#fff}

/* 数据统计 */
.stats-bar{display:flex;justify-content:center;gap:50px;padding:40px 0;flex-wrap:wrap}
.stat-item{text-align:center}
.stat-item .stat-num{font-size:2.5rem;font-weight:700;background:linear-gradient(135deg,#FF6B35,#E94560);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-item .stat-label{color:#999;font-size:.9rem;margin-top:5px}

/* 内页通用 */
.page-header{background:#1A1A2E;padding:60px 0 40px;text-align:center}
.page-header h1{color:#fff;font-size:2.2rem;margin-bottom:10px}
.page-header p{color:#ccc;font-size:1.05rem}
.page-content{padding:40px 0}
.page-content p{margin-bottom:15px;line-height:1.8}
.page-content h2{margin:30px 0 15px;font-size:1.6rem}
.page-content h3{margin:25px 0 12px;font-size:1.3rem}

/* 响应式 */
@media(max-width:768px){
  .header-inner{padding:0 15px}
  .main-nav{position:fixed;top:70px;left:0;right:0;background:#1A1A2E;padding:20px;transform:translateY(-120%);transition:transform .3s;z-index:999}
  .main-nav.active{transform:translateY(0)}
  .main-nav ul{flex-direction:column;gap:5px}
  .main-nav a{display:block;padding:12px 16px}
  .mobile-menu-btn{display:block}
  .hero-banner{height:350px}
  .hero-overlay h1{font-size:1.8rem}
  .hero-overlay p{font-size:1rem}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
  .section{padding:40px 0}
  .section-title h2{font-size:1.6rem}
  .stats-bar{gap:25px}
  .stat-item .stat-num{font-size:2rem}
  .footer-grid{grid-template-columns:1fr 1fr}
  .expert-grid{grid-template-columns:1fr 1fr}
  .ai-features{grid-template-columns:1fr}
  .short-video-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
}
@media(max-width:480px){
  .footer-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .video-grid{grid-template-columns:1fr}
  .hero-banner{height:280px}
  .hero-overlay h1{font-size:1.5rem}
  .search-box{margin:0 10px}
}

/* 懒加载占位 */
.lazy{opacity:0;transition:opacity .5s}
.lazy.loaded{opacity:1}

/* 动画 */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.animate-in{animation:fadeInUp .6s ease forwards}