/* ============================================
   糖心vlog - 原创样式表
   品牌色系：糖心粉红 #E8456B / 深夜蓝 #1A1A2E
   ============================================ */

/* === 基础重置 === */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;color:#2D2D3E;background:#FFF5F7;line-height:1.7;overflow-x:hidden}
a{text-decoration:none;color:#E8456B;transition:color .3s}
a:hover{color:#FF7E9D}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* === 头部导航 === */
.site-header{background:#1A1A2E;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:0 20px;max-width:1200px;margin:0 auto;height:68px}
.logo-link{display:flex;align-items:center;gap:10px}
.logo-link img{height:42px;width:auto}
.logo-text{color:#fff;font-size:1.3rem;font-weight:700;letter-spacing:1px}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{color:#ddd;padding:8px 14px;border-radius:6px;font-size:.95rem;transition:all .3s}
.main-nav a:hover,.main-nav a.active{color:#fff;background:linear-gradient(135deg,#E8456B,#FF7E9D);box-shadow:0 2px 8px rgba(232,69,107,.3)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:#fff;border-radius:2px;transition:all .3s}

/* === 搜索框 === */
.search-bar{background:linear-gradient(135deg,#E8456B 0%,#FF7E9D 100%);padding:14px 0}
.search-bar form{max-width:600px;margin:0 auto;display:flex;gap:0;padding:0 20px}
.search-bar input[type="text"]{flex:1;padding:12px 20px;border:none;border-radius:25px 0 0 25px;font-size:.95rem;outline:none;background:#fff}
.search-bar button{padding:12px 28px;background:#1A1A2E;color:#fff;border:none;border-radius:0 25px 25px 0;cursor:pointer;font-size:.95rem;transition:background .3s}
.search-bar button:hover{background:#2a2a4e}

/* === 面包屑 === */
.breadcrumb{padding:12px 0;font-size:.85rem;color:#888}
.breadcrumb a{color:#E8456B}
.breadcrumb span{margin:0 6px;color:#ccc}

/* === Hero轮播 === */
.hero-section{position:relative;overflow:hidden;height:520px;background:#1A1A2E}
.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity 1s ease}
.hero-slide.active{opacity:1}
.hero-slide img{width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(to right,rgba(26,26,46,.85) 0%,rgba(26,26,46,.3) 100%);display:flex;align-items:center;padding:0 60px}
.hero-content{max-width:560px;color:#fff}
.hero-content h1{font-size:2.4rem;margin-bottom:16px;line-height:1.3}
.hero-content p{font-size:1.1rem;margin-bottom:24px;opacity:.9;line-height:1.8}
.hero-btn{display:inline-block;padding:14px 36px;background:linear-gradient(135deg,#E8456B,#FF7E9D);color:#fff;border-radius:30px;font-size:1rem;font-weight:600;transition:transform .3s,box-shadow .3s}
.hero-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(232,69,107,.4);color:#fff}

/* === 通用区块 === */
.section{padding:60px 0}
.section-alt{background:#fff}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:1.8rem;color:#1A1A2E;margin-bottom:8px;position:relative;display:inline-block}
.section-title h2::after{content:'';position:absolute;bottom:-8px;left:50%;transform:translateX(-50%);width:50px;height:3px;background:linear-gradient(90deg,#E8456B,#FF7E9D);border-radius:2px}
.section-title p{color:#888;font-size:.95rem;margin-top:16px}

/* === 视频卡片网格 === */
.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,.06);transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 32px rgba(232,69,107,.12)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden}
.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;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;background:rgba(0,0,0,.3)}
.video-card:hover .play-btn{opacity:1}
.play-btn svg{width:56px;height:56px;fill:#fff;filter:drop-shadow(0 2px 8px rgba(0,0,0,.3))}
.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;color:#1A1A2E;margin-bottom:6px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;align-items:center;gap:12px;font-size:.8rem;color:#999}
.video-meta span{display:flex;align-items:center;gap:3px}
.video-tag{display:inline-block;padding:2px 8px;background:#FFF0F3;color:#E8456B;border-radius:4px;font-size:.75rem;margin-top:6px}

/* === 分类标签 === */
.category-tabs{display:flex;justify-content:center;gap:12px;margin-bottom:30px;flex-wrap:wrap}
.category-tabs a{padding:8px 22px;border-radius:20px;background:#fff;color:#666;border:1px solid #eee;font-size:.9rem;transition:all .3s}
.category-tabs a:hover,.category-tabs a.active{background:linear-gradient(135deg,#E8456B,#FF7E9D);color:#fff;border-color:transparent}

/* === 专家团队 === */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.expert-card{background:#fff;border-radius:12px;padding:28px 20px;text-align:center;box-shadow:0 4px 16px rgba(0,0,0,.06);transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-avatar{width:100px;height:100px;border-radius:50%;margin:0 auto 16px;overflow:hidden;border:3px solid #FF7E9D}
.expert-avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h4{font-size:1.05rem;color:#1A1A2E;margin-bottom:4px}
.expert-card .expert-role{color:#E8456B;font-size:.85rem;margin-bottom:10px}
.expert-card p{font-size:.85rem;color:#888;line-height:1.6;margin-bottom:14px}
.expert-btn{display:inline-block;padding:6px 18px;border:1px solid #E8456B;color:#E8456B;border-radius:20px;font-size:.82rem;transition:all .3s}
.expert-btn:hover{background:#E8456B;color:#fff}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:10px;margin-bottom:12px;box-shadow:0 2px 8px rgba(0,0,0,.04);overflow:hidden}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:#1A1A2E;transition:background .3s}
.faq-question:hover{background:#FFF0F3}
.faq-question::after{content:'+';font-size:1.4rem;color:#E8456B;transition:transform .3s}
.faq-item.open .faq-question::after{transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 24px}
.faq-item.open .faq-answer{max-height:300px;padding:0 24px 18px}
.faq-answer p{color:#666;font-size:.9rem;line-height:1.8}

/* === 用户评价 === */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.review-card{background:#fff;border-radius:12px;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:linear-gradient(135deg,#E8456B,#FF7E9D);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.1rem}
.review-info h5{font-size:.95rem;color:#1A1A2E}
.review-info .review-date{font-size:.8rem;color:#999}
.review-stars{color:#FFB347;font-size:.9rem;margin-bottom:8px}
.review-card p{font-size:.9rem;color:#555;line-height:1.8}

/* === 合作品牌 === */
.partner-wall{display:flex;justify-content:center;align-items:center;gap:40px;flex-wrap:wrap;padding:20px 0}
.partner-item{width:120px;height:60px;background:#f5f5f5;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:.85rem;color:#999;font-weight:600;transition:all .3s}
.partner-item:hover{background:#FFF0F3;color:#E8456B}

/* === How-To指南 === */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.howto-step{background:#fff;border-radius:12px;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:linear-gradient(135deg,#E8456B,#FF7E9D);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem}
.howto-step h4{margin:10px 0 8px;color:#1A1A2E;font-size:1rem}
.howto-step p{font-size:.85rem;color:#888;line-height:1.6}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info-card{background:#fff;border-radius:12px;padding:32px;box-shadow:0 4px 16px rgba(0,0,0,.06)}
.contact-info-card h3{color:#1A1A2E;margin-bottom:20px;font-size:1.2rem}
.contact-item{display:flex;align-items:flex-start;gap:12px;margin-bottom:16px}
.contact-icon{width:40px;height:40px;background:#FFF0F3;border-radius:8px;display:flex;align-items:center;justify-content:center;flex-shrink:0;color:#E8456B;font-size:1.1rem}
.contact-detail h5{font-size:.9rem;color:#1A1A2E;margin-bottom:2px}
.contact-detail p{font-size:.85rem;color:#888}

/* === 社交分享 === */
.share-bar{display:flex;justify-content:center;gap:16px;padding:20px 0}
.share-btn{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1rem;transition:transform .3s}
.share-btn:hover{transform:scale(1.15);color:#fff}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#161823}
.share-bilibili{background:#00A1D6}

/* === 页脚 === */
.site-footer{background:#1A1A2E;color:#aaa;padding:48px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:32px}
.footer-brand p{font-size:.85rem;line-height:1.8;margin-top:12px}
.footer-brand img{height:38px}
.footer-links h4,.footer-qr h4{color:#fff;font-size:1rem;margin-bottom:16px}
.footer-links a{display:block;color:#aaa;font-size:.85rem;margin-bottom:8px;transition:color .3s}
.footer-links a:hover{color:#FF7E9D}
.footer-qr-imgs{display:flex;gap:16px}
.footer-qr-imgs img{width:100px;height:100px;border-radius:8px;border:2px solid #333}
.footer-bottom{border-top:1px solid #333;padding:20px 0;text-align:center;font-size:.82rem}
.footer-bottom a{color:#FF7E9D}

/* === 内页通用 === */
.page-banner{background:linear-gradient(135deg,#1A1A2E 0%,#2a2a4e 100%);padding:50px 0;text-align:center;color:#fff}
.page-banner h1{font-size:2rem;margin-bottom:8px}
.page-banner p{opacity:.8;font-size:1rem}
.page-content{padding:40px 0}
.sidebar-section{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 16px rgba(0,0,0,.06);margin-bottom:24px}
.sidebar-section h3{font-size:1.05rem;color:#1A1A2E;margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid #FFF0F3}
.sidebar-link{display:block;padding:8px 0;color:#555;font-size:.9rem;border-bottom:1px solid #f5f5f5;transition:color .3s}
.sidebar-link:hover{color:#E8456B}

/* === 数据统计条 === */
.stats-bar{background:linear-gradient(135deg,#E8456B,#FF7E9D);padding:40px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center;color:#fff}
.stat-item h3{font-size:2.2rem;font-weight:700;margin-bottom:4px}
.stat-item p{font-size:.9rem;opacity:.9}

/* === 响应式 === */
@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:1fr 1fr}
  .howto-steps{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .header-inner{padding:0 16px}
  .main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:#1A1A2E;flex-direction:column;padding:16px;gap:4px;box-shadow:0 8px 24px rgba(0,0,0,.2)}
  .main-nav.open{display:flex}
  .nav-toggle{display:flex}
  .hero-section{height:360px}
  .hero-content h1{font-size:1.6rem}
  .hero-overlay{padding:0 24px}
  .video-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .expert-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .section{padding:40px 0}
  .section-title h2{font-size:1.4rem}
  .partner-wall{gap:20px}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .hero-section{height:280px}
  .hero-content h1{font-size:1.3rem}
  .search-bar form{flex-direction:column;gap:8px}
  .search-bar input[type="text"]{border-radius:25px}
  .search-bar button{border-radius:25px}
}