/* ============================================
   困困兔 - 原创样式表
   品牌色系：糖心粉 #E8456B | 深夜蓝 #1A1A2E | 甜蜜金 #FFD93D | 奶油白 #F8F0E3
   辅助色：科技紫 #6C63FF | 清新蓝 #00D2FF
   ============================================ */

/* === 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','Helvetica Neue',Arial,sans-serif;color:#333;background:#F8F0E3;line-height:1.8;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:color .3s}
a:hover{color:#E8456B}
ul,ol{list-style:none}
img{max-width:100%;height:auto;display:block}
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-padding{padding:60px 0}

/* === 头部导航 === */
.site-header{background:linear-gradient(135deg,#1A1A2E 0%,#2D2B55 100%);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:12px 20px;max-width:1200px;margin:0 auto}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{height:42px;width:auto}
.logo-text{font-size:22px;font-weight:800;background:linear-gradient(135deg,#E8456B,#FFD93D);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:1px}
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{color:#fff;padding:10px 16px;font-size:15px;font-weight:500;transition:all .3s;border-radius:6px;white-space:nowrap}
.main-nav a:hover,.main-nav a.active{background:rgba(232,69,107,.2);color:#FFD93D}
.mobile-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.mobile-toggle span{width:26px;height:3px;background:#fff;border-radius:2px;transition:all .3s}

/* === 搜索栏 === */
.search-bar{background:linear-gradient(135deg,#2D2B55,#1A1A2E);padding:16px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.search-bar .container{display:flex;justify-content:center}
.search-form{display:flex;max-width:600px;width:100%;border-radius:30px;overflow:hidden;box-shadow:0 4px 15px rgba(232,69,107,.3)}
.search-form input{flex:1;padding:12px 24px;border:none;font-size:15px;background:#fff;outline:none;color:#333}
.search-form input::placeholder{color:#999}
.search-form button{padding:12px 28px;background:linear-gradient(135deg,#E8456B,#FF6B8A);color:#fff;border:none;font-size:15px;cursor:pointer;font-weight:600;transition:all .3s}
.search-form button:hover{background:linear-gradient(135deg,#d63a5e,#E8456B)}

/* === Hero Banner === */
.hero-section{position:relative;height:520px;overflow:hidden;background:#1A1A2E}
.hero-section .hero-bg{width:100%;height:100%;object-fit:cover;opacity:.6;position:absolute;top:0;left:0}
.hero-content{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;color:#fff;padding:0 20px}
.hero-content h1{font-size:48px;font-weight:900;margin-bottom:16px;text-shadow:2px 2px 10px rgba(0,0,0,.5)}
.hero-content h1 span{background:linear-gradient(135deg,#E8456B,#FFD93D);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-content p{font-size:20px;max-width:700px;margin-bottom:28px;opacity:.9;text-shadow:1px 1px 5px rgba(0,0,0,.3)}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}
.btn-primary{display:inline-block;padding:14px 36px;background:linear-gradient(135deg,#E8456B,#FF6B8A);color:#fff;border-radius:30px;font-size:16px;font-weight:600;transition:all .3s;box-shadow:0 4px 15px rgba(232,69,107,.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(232,69,107,.5);color:#fff}
.btn-secondary{display:inline-block;padding:14px 36px;border:2px solid #FFD93D;color:#FFD93D;border-radius:30px;font-size:16px;font-weight:600;transition:all .3s}
.btn-secondary:hover{background:#FFD93D;color:#1A1A2E}

/* === 面包屑 === */
.breadcrumb{padding:14px 0;font-size:14px;color:#888}
.breadcrumb a{color:#E8456B}
.breadcrumb span{margin:0 8px;color:#ccc}

/* === 区块标题 === */
.section-title{text-align:center;margin-bottom:45px}
.section-title h2{font-size:32px;color:#1A1A2E;margin-bottom:10px;position:relative;display:inline-block}
.section-title h2::after{content:'';position:absolute;bottom:-8px;left:50%;transform:translateX(-50%);width:60px;height:4px;background:linear-gradient(135deg,#E8456B,#FFD93D);border-radius:2px}
.section-title p{color:#666;font-size:16px;margin-top:18px}

/* === 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 20px rgba(0,0,0,.08);transition:all .3s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 35px rgba(232,69,107,.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(1.08)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:56px;height:56px;background:rgba(232,69,107,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:all .3s;z-index:2}
.play-btn::after{content:'';width:0;height:0;border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:4px}
.video-card:hover .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:12px;z-index:2}
.video-info{padding:16px}
.video-info h3{font-size:15px;font-weight:600;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.5;color:#1A1A2E}
.video-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:#999}
.video-meta .views::before{content:'▶ '}
.video-meta .likes::before{content:'♥ '}
.video-tags{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.video-tags span{padding:2px 10px;background:#FFF0F3;color:#E8456B;border-radius:12px;font-size:12px}

/* === 服务模块 === */
.services-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,.06);transition:all .3s;border:1px solid transparent}
.service-card:hover{border-color:#E8456B;transform:translateY(-4px);box-shadow:0 8px 30px rgba(232,69,107,.12)}
.service-icon{width:72px;height:72px;margin:0 auto 20px;background:linear-gradient(135deg,#FFF0F3,#FFE8EC);border-radius:20px;display:flex;align-items:center;justify-content:center;font-size:32px}
.service-card h3{font-size:20px;margin-bottom:12px;color:#1A1A2E}
.service-card p{color:#666;font-size:14px;line-height:1.7}

/* === AI赋能 === */
.ai-section{background:linear-gradient(135deg,#1A1A2E 0%,#2D2B55 50%,#1A1A2E 100%);color:#fff}
.ai-section .section-title h2{color:#fff}
.ai-section .section-title p{color:rgba(255,255,255,.7)}
.ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.ai-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:32px 24px;text-align:center;transition:all .3s;backdrop-filter:blur(10px)}
.ai-card:hover{background:rgba(232,69,107,.1);border-color:rgba(232,69,107,.3);transform:translateY(-4px)}
.ai-card .ai-icon{font-size:42px;margin-bottom:16px}
.ai-card h3{font-size:20px;margin-bottom:12px;color:#FFD93D}
.ai-card p{color:rgba(255,255,255,.7);font-size:14px;line-height:1.7}

/* === 专家团队 === */
.experts-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.expert-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:all .3s;text-align:center}
.expert-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(232,69,107,.12)}
.expert-avatar{width:120px;height:120px;border-radius:50%;margin:28px auto 16px;overflow:hidden;border:3px solid #E8456B}
.expert-avatar img{width:100%;height:100%;object-fit:cover}
.expert-info{padding:0 20px 24px}
.expert-info h3{font-size:18px;color:#1A1A2E;margin-bottom:4px}
.expert-info .title{color:#E8456B;font-size:14px;margin-bottom:8px}
.expert-info p{color:#666;font-size:13px;line-height:1.6;margin-bottom:12px}
.expert-btns{display:flex;gap:8px;justify-content:center;padding:0 20px 20px}
.expert-btns a{padding:6px 16px;border-radius:20px;font-size:13px;font-weight:500;transition:all .3s}
.expert-btns .btn-contact{background:#E8456B;color:#fff}
.expert-btns .btn-contact:hover{background:#d63a5e;color:#fff}
.expert-btns .btn-works{border:1px solid #E8456B;color:#E8456B}
.expert-btns .btn-works:hover{background:#E8456B;color:#fff}

/* === 社区模块 === */
.community-section{background:linear-gradient(180deg,#FFF5F7 0%,#F8F0E3 100%)}
.community-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.community-card{background:#fff;border-radius:16px;padding:28px;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:all .3s;border-left:4px solid #E8456B}
.community-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(232,69,107,.12)}
.community-card .card-icon{font-size:36px;margin-bottom:12px}
.community-card h3{font-size:18px;color:#1A1A2E;margin-bottom:8px}
.community-card p{color:#666;font-size:14px;line-height:1.7}
.community-card .card-stats{margin-top:12px;font-size:13px;color:#E8456B;font-weight:600}

/* === 合作品牌 === */
.brands-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:32px;align-items:center}
.brand-item{width:140px;height:70px;background:#fff;border-radius:10px;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 10px rgba(0,0,0,.06);padding:12px;transition:all .3s;font-size:14px;font-weight:600;color:#666}
.brand-item:hover{box-shadow:0 4px 15px rgba(232,69,107,.15);transform:scale(1.05)}

/* === 用户评价 === */
.reviews-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.review-card{background:#fff;border-radius:16px;padding:28px;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:all .3s}
.review-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(232,69,107,.12)}
.review-stars{color:#FFD93D;font-size:16px;margin-bottom:12px;letter-spacing:2px}
.review-text{color:#555;font-size:14px;line-height:1.7;margin-bottom:16px;font-style:italic}
.review-author{display:flex;align-items:center;gap:10px}
.review-author .avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#E8456B,#FFD93D);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:16px}
.review-author .name{font-weight:600;color:#1A1A2E;font-size:14px}
.review-author .date{font-size:12px;color:#999}

/* === 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 24px;font-size:16px;font-weight:600;color:#1A1A2E;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:all .3s}
.faq-question:hover{color:#E8456B}
.faq-question .arrow{font-size:20px;transition:transform .3s;color:#E8456B}
.faq-item.active .faq-question .arrow{transform:rotate(180deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all .4s ease;color:#666;font-size:14px;line-height:1.8}
.faq-item.active .faq-answer{padding:0 24px 20px;max-height:300px}

/* === 联系我们 === */
.contact-section{background:linear-gradient(135deg,#1A1A2E,#2D2B55)}
.contact-section .section-title h2{color:#fff}
.contact-section .section-title p{color:rgba(255,255,255,.7)}
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:36px;color:#fff}
.contact-info-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:32px;backdrop-filter:blur(10px)}
.contact-info-card h3{font-size:20px;color:#FFD93D;margin-bottom:20px}
.contact-info-card .info-item{display:flex;align-items:flex-start;gap:12px;margin-bottom:16px;font-size:14px;color:rgba(255,255,255,.8)}
.contact-info-card .info-item .label{color:#E8456B;font-weight:600;min-width:80px}
.contact-qr{display:flex;gap:24px;justify-content:center;margin-top:20px}
.contact-qr .qr-item{text-align:center}
.contact-qr .qr-item img{width:140px;height:140px;border-radius:10px;border:2px solid rgba(255,255,255,.2)}
.contact-qr .qr-item p{margin-top:8px;font-size:13px;color:rgba(255,255,255,.7)}

/* === How-To指南 === */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:32px}
.howto-step{text-align:center;padding:24px;background:#fff;border-radius:16px;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:all .3s}
.howto-step:hover{transform:translateY(-4px)}
.step-number{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,#E8456B,#FFD93D);color:#fff;font-size:20px;font-weight:800;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.howto-step h4{font-size:16px;color:#1A1A2E;margin-bottom:8px}
.howto-step p{font-size:13px;color:#666;line-height:1.6}

/* === 社交分享 === */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:24px}
.share-btn{padding:10px 20px;border-radius:25px;font-size:14px;font-weight:500;color:#fff;transition:all .3s;cursor:pointer;border:none}
.share-btn:hover{transform:translateY(-2px);opacity:.9;color:#fff}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#000}
.share-bilibili{background:#00A1D6}

/* === 页脚 === */
.site-footer{background:#0D0D1A;color:rgba(255,255,255,.6);padding:48px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand .logo-wrap{margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.7;margin-bottom:16px}
.footer-col h4{color:#FFD93D;font-size:16px;margin-bottom:16px;font-weight:600}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{color:rgba(255,255,255,.6);font-size:14px;transition:color .3s}
.footer-col ul li a:hover{color:#E8456B}
.footer-bottom{padding:20px 0;text-align:center;font-size:13px;color:rgba(255,255,255,.4)}
.footer-bottom a{color:#E8456B}
.footer-qr{display:flex;gap:20px;margin-top:16px}
.footer-qr .qr-item{text-align:center}
.footer-qr .qr-item img{width:100px;height:100px;border-radius:8px}
.footer-qr .qr-item p{font-size:12px;margin-top:6px;color:rgba(255,255,255,.5)}

/* === 内页通用 === */
.page-header{background:linear-gradient(135deg,#1A1A2E,#2D2B55);padding:48px 0;text-align:center;color:#fff}
.page-header h1{font-size:36px;color:#fff;margin-bottom:10px}
.page-header p{color:rgba(255,255,255,.7);font-size:16px}
.page-content{padding:48px 0}
.page-content p{margin-bottom:16px;line-height:1.8;color:#555}

/* === 标签云 === */
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:20px}
.tag-cloud a{padding:6px 18px;background:#FFF0F3;color:#E8456B;border-radius:20px;font-size:13px;transition:all .3s}
.tag-cloud a:hover{background:#E8456B;color:#fff}

/* === 数据统计 === */
.stats-bar{display:flex;justify-content:center;gap:48px;padding:36px 0;flex-wrap:wrap}
.stat-item{text-align:center}
.stat-item .num{font-size:36px;font-weight:800;background:linear-gradient(135deg,#E8456B,#FFD93D);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-item .label{font-size:14px;color:#666;margin-top:4px}

/* === 懒加载占位 === */
.lazy-placeholder{background:linear-gradient(90deg,#f0f0f0 25%,#e0e0e0 50%,#f0f0f0 75%);background-size:200% 100%;animation:shimmer 1.5s infinite}
@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* === 响应式 === */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .experts-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-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){
  .main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#1A1A2E;flex-direction:column;padding:16px;gap:4px;box-shadow:0 10px 30px rgba(0,0,0,.3)}
  .main-nav.active{display:flex}
  .main-nav a{padding:12px 16px;border-radius:8px}
  .mobile-toggle{display:flex}
  .hero-section{height:400px}
  .hero-content h1{font-size:30px}
  .hero-content p{font-size:16px}
  .video-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .services-grid{grid-template-columns:1fr}
  .ai-grid{grid-template-columns:1fr}
  .community-grid{grid-template-columns:1fr}
  .experts-grid{grid-template-columns:1fr}
  .reviews-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .stats-bar{gap:24px}
  .stat-item .num{font-size:28px}
  .section-title h2{font-size:24px}
  .brands-wall{gap:16px}
  .brand-item{width:110px;height:55px;font-size:12px}
  .howto-steps{grid-template-columns:1fr}
  .hero-btns{flex-direction:column;align-items:center}
  .search-form{flex-direction:row}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .hero-section{height:320px}
  .hero-content h1{font-size:24px}
  .section-padding{padding:40px 0}
  .container{padding:0 16px}
}

/* === 动画 === */
.fade-in{opacity:0;transform:translateY(20px);transition:all .6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* === 视频播放器样式 === */
.video-player-wrap{position:relative;padding-top:56.25%;background:#000;border-radius:12px;overflow:hidden}
.video-player-wrap video,.video-player-wrap iframe{position:absolute;top:0;left:0;width:100%;height:100%}

/* === 内容卡片 === */
.content-card{background:#fff;border-radius:16px;padding:32px;box-shadow:0 4px 20px rgba(0,0,0,.06);margin-bottom:24px}
.content-card h3{font-size:20px;color:#1A1A2E;margin-bottom:12px}
.content-card p{color:#666;font-size:14px;line-height:1.8}

/* === 标签页 === */
.tab-nav{display:flex;gap:4px;border-bottom:2px solid #eee;margin-bottom:24px;flex-wrap:wrap}
.tab-nav a{padding:12px 24px;font-size:15px;color:#666;font-weight:500;transition:all .3s;border-bottom:2px solid transparent;margin-bottom:-2px}
.tab-nav a:hover,.tab-nav a.active{color:#E8456B;border-bottom-color:#E8456B}

/* === 回到顶部 === */
.back-to-top{position:fixed;bottom:30px;right:30px;width:48px;height:48px;background:linear-gradient(135deg,#E8456B,#FF6B8A);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:20px;cursor:pointer;opacity:0;visibility:hidden;transition:all .3s;z-index:999;border:none;box-shadow:0 4px 15px rgba(232,69,107,.4)}
.back-to-top.visible{opacity:1;visibility:visible}
.back-to-top:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(232,69,107,.5)}