/* ============================================
   糖心vlog 官网样式表 - 原创设计
   品牌色: 深紫 #6B21A8 / 青蓝 #06B6D4 / 金色 #D4A017
   ============================================ */

/* 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","Hiragino Sans GB",Arial,sans-serif;color:#e2e8f0;background:#0f0a1e;line-height:1.7;overflow-x:hidden}
a{color:#06B6D4;text-decoration:none;transition:color .3s}
a:hover{color:#D4A017}
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:#f1f5f9}

/* 容器 */
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* 顶部导航 */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(15,10,30,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(107,33,168,.3);transition:background .3s}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:68px;max-width:1200px;margin:0 auto;padding:0 20px}
.nav-logo{display:flex;align-items:center;gap:10px}
.nav-logo img{width:40px;height:40px;border-radius:8px}
.nav-logo span{font-size:1.25rem;font-weight:800;background:linear-gradient(135deg,#06B6D4,#6B21A8);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.nav-menu{display:flex;gap:6px}
.nav-menu a{padding:8px 16px;border-radius:8px;font-size:.9rem;color:#cbd5e1;transition:all .3s}
.nav-menu a:hover,.nav-menu a.active{background:rgba(107,33,168,.25);color:#06B6D4}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:#e2e8f0;border-radius:2px;transition:all .3s}

/* 搜索框 */
.search-bar{background:rgba(107,33,168,.1);padding:12px 0;border-bottom:1px solid rgba(107,33,168,.15)}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;max-width:560px;width:100%}
.search-box input{flex:1;padding:10px 18px;border:2px solid rgba(107,33,168,.4);border-right:none;border-radius:25px 0 0 25px;background:rgba(15,10,30,.7);color:#e2e8f0;font-size:.95rem;outline:none;transition:border-color .3s}
.search-box input:focus{border-color:#06B6D4}
.search-box button{padding:10px 24px;border:2px solid rgba(107,33,168,.4);border-left:none;border-radius:0 25px 25px 0;background:linear-gradient(135deg,#6B21A8,#06B6D4);color:#fff;font-size:.95rem;cursor:pointer;transition:opacity .3s}
.search-box button:hover{opacity:.85}

/* Banner区域 */
.hero-banner{position:relative;min-height:520px;display:flex;align-items:center;justify-content:center;background-size:cover;background-position:center;background-repeat:no-repeat;margin-top:68px;overflow:hidden}
.hero-banner::before{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,10,30,.7) 0%,rgba(15,10,30,.5) 50%,rgba(15,10,30,.9) 100%)}
.hero-content{position:relative;text-align:center;padding:60px 20px;max-width:800px}
.hero-content h1{font-size:2.8rem;margin-bottom:16px;background:linear-gradient(135deg,#06B6D4,#D4A017,#6B21A8);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-content p{font-size:1.15rem;color:#cbd5e1;margin-bottom:28px;line-height:1.8}
.hero-btn{display:inline-block;padding:14px 36px;border-radius:30px;background:linear-gradient(135deg,#6B21A8,#06B6D4);color:#fff;font-size:1rem;font-weight:600;transition:transform .3s,box-shadow .3s}
.hero-btn:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(6,182,212,.35);color:#fff}

/* 通用模块 */
.section{padding:70px 0}
.section-alt{background:rgba(107,33,168,.06)}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:2rem;margin-bottom:10px;color:#f1f5f9}
.section-title h2 .highlight{color:#06B6D4}
.section-title p{color:#94a3b8;font-size:1rem}

/* 面包屑 */
.breadcrumb{padding:14px 0;font-size:.85rem;color:#94a3b8}
.breadcrumb a{color:#06B6D4}
.breadcrumb span{margin:0 6px;color:#64748b}

/* 视频卡片网格 */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{position:relative;border-radius:14px;overflow:hidden;background:#1a1230;border:1px solid rgba(107,33,168,.2);transition:transform .3s,box-shadow .3s}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(107,33,168,.25)}
.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 .5s}
.video-card:hover .video-thumb img{transform:scale(1.08)}
.video-play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;background:rgba(15,10,30,.5)}
.video-card:hover .video-play-btn{opacity:1}
.video-play-btn .play-icon{width:56px;height:56px;border-radius:50%;background:rgba(6,182,212,.9);display:flex;align-items:center;justify-content:center;transition:transform .3s}
.video-play-btn .play-icon::after{content:'';width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:4px}
.video-card:hover .play-icon{transform:scale(1.1)}
.video-info{padding:16px}
.video-info h3{font-size:1rem;margin-bottom:8px;color:#f1f5f9;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:14px;font-size:.8rem;color:#94a3b8}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tag{display:inline-block;padding:2px 10px;border-radius:12px;font-size:.75rem;background:rgba(107,33,168,.25);color:#c084fc;margin-top:8px}

/* 模块卡片 */
.module-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.module-card{padding:28px;border-radius:14px;background:linear-gradient(135deg,rgba(107,33,168,.12),rgba(6,182,212,.08));border:1px solid rgba(107,33,168,.2);transition:transform .3s,border-color .3s}
.module-card:hover{transform:translateY(-4px);border-color:#06B6D4}
.module-card .icon{width:52px;height:52px;border-radius:12px;background:linear-gradient(135deg,#6B21A8,#06B6D4);display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-size:1.5rem}
.module-card h3{font-size:1.1rem;margin-bottom:10px;color:#f1f5f9}
.module-card p{font-size:.9rem;color:#94a3b8;line-height:1.6}

/* 专家展示 */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:28px}
.expert-card{text-align:center;padding:32px 20px;border-radius:14px;background:#1a1230;border:1px solid rgba(107,33,168,.2);transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-card img{width:120px;height:120px;border-radius:50%;object-fit:cover;margin:0 auto 16px;border:3px solid #6B21A8}
.expert-card h3{font-size:1.05rem;color:#f1f5f9;margin-bottom:4px}
.expert-card .title{font-size:.85rem;color:#06B6D4;margin-bottom:10px}
.expert-card p{font-size:.85rem;color:#94a3b8;line-height:1.5;margin-bottom:14px}
.expert-card .btn-sm{display:inline-block;padding:7px 20px;border-radius:20px;font-size:.8rem;border:1px solid #6B21A8;color:#c084fc;transition:all .3s}
.expert-card .btn-sm:hover{background:#6B21A8;color:#fff}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid rgba(107,33,168,.2);border-radius:12px;margin-bottom:12px;overflow:hidden;background:#1a1230}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-size:1rem;color:#f1f5f9;transition:background .3s}
.faq-question:hover{background:rgba(107,33,168,.15)}
.faq-question .arrow{transition:transform .3s;color:#06B6D4;font-size:1.2rem}
.faq-item.active .faq-question .arrow{transform:rotate(180deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 24px}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 18px}
.faq-answer p{font-size:.9rem;color:#94a3b8;line-height:1.7}

/* 用户评论 */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.review-card{padding:24px;border-radius:14px;background:#1a1230;border:1px solid rgba(107,33,168,.2)}
.review-card .stars{color:#D4A017;margin-bottom:10px;font-size:1rem;letter-spacing:2px}
.review-card p{font-size:.9rem;color:#cbd5e1;line-height:1.6;margin-bottom:12px;font-style:italic}
.review-card .reviewer{display:flex;align-items:center;gap:10px}
.review-card .reviewer .avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#6B21A8,#06B6D4);display:flex;align-items:center;justify-content:center;color:#fff;font-size:.85rem;font-weight:700}
.review-card .reviewer .name{font-size:.85rem;color:#94a3b8}

/* 联系我们 */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.contact-card{padding:24px;border-radius:14px;background:#1a1230;border:1px solid rgba(107,33,168,.2);text-align:center}
.contact-card h3{font-size:1.05rem;color:#f1f5f9;margin-bottom:12px}
.contact-card p{font-size:.9rem;color:#94a3b8;line-height:1.6}
.contact-card img{max-width:180px;margin:12px auto 0;border-radius:8px}

/* 社交分享 */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:25px;font-size:.85rem;color:#fff;transition:transform .3s,opacity .3s;cursor:pointer}
.share-btn:hover{transform:translateY(-2px);opacity:.85;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:#0a0618;border-top:1px solid rgba(107,33,168,.2);padding:50px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:32px;margin-bottom:40px}
.footer-col h4{font-size:1rem;color:#f1f5f9;margin-bottom:14px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:linear-gradient(90deg,#6B21A8,#06B6D4)}
.footer-col p,.footer-col a{font-size:.85rem;color:#94a3b8;line-height:1.8;display:block}
.footer-col a:hover{color:#06B6D4}
.footer-bottom{border-top:1px solid rgba(107,33,168,.15);padding:20px 0;text-align:center}
.footer-bottom p{font-size:.8rem;color:#64748b}
.footer-qr{display:flex;gap:24px;justify-content:center;margin:20px 0}
.footer-qr img{width:120px;height:120px;border-radius:8px;border:1px solid rgba(107,33,168,.2)}
.footer-qr-label{font-size:.75rem;color:#94a3b8;text-align:center;margin-top:6px}

/* How-To指南 */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px;counter-reset:step}
.howto-step{padding:24px;border-radius:14px;background:#1a1230;border:1px solid rgba(107,33,168,.2);counter-increment:step;position:relative}
.howto-step::before{content:counter(step);position:absolute;top:-12px;left:20px;width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,#6B21A8,#06B6D4);display:flex;align-items:center;justify-content:center;color:#fff;font-size:.9rem;font-weight:700}
.howto-step h4{margin-top:8px;margin-bottom:8px;color:#f1f5f9;font-size:.95rem}
.howto-step p{font-size:.85rem;color:#94a3b8;line-height:1.6}

/* 合作品牌墙 */
.brand-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center}
.brand-wall .brand-item{padding:16px 28px;border-radius:12px;background:rgba(107,33,168,.1);border:1px solid rgba(107,33,168,.15);font-size:1rem;color:#94a3b8;font-weight:600;transition:all .3s}
.brand-wall .brand-item:hover{border-color:#06B6D4;color:#06B6D4}

/* 社区频道 */
.channel-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px}
.channel-card{padding:20px;border-radius:12px;background:linear-gradient(135deg,rgba(107,33,168,.15),rgba(6,182,212,.1));text-align:center;transition:transform .3s}
.channel-card:hover{transform:translateY(-4px)}
.channel-card .emoji{font-size:2.2rem;margin-bottom:8px}
.channel-card h4{font-size:.95rem;color:#f1f5f9;margin-bottom:4px}
.channel-card p{font-size:.8rem;color:#94a3b8}

/* MCP服务前端占位 */
.mcp-widget{padding:20px;border-radius:12px;background:rgba(6,182,212,.05);border:1px dashed rgba(6,182,212,.3);text-align:center;margin-top:20px}
.mcp-widget p{font-size:.85rem;color:#64748b}

/* 响应式 */
@media(max-width:768px){
  .nav-menu{position:fixed;top:68px;left:0;width:100%;background:rgba(15,10,30,.98);flex-direction:column;padding:20px;gap:4px;transform:translateY(-120%);transition:transform .3s;border-bottom:1px solid rgba(107,33,168,.2)}
  .nav-menu.open{transform:translateY(0)}
  .nav-toggle{display:flex}
  .hero-content h1{font-size:1.8rem}
  .hero-banner{min-height:400px}
  .video-grid{grid-template-columns:1fr}
  .module-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr 1fr}
  .review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .howto-steps{grid-template-columns:1fr}
  .channel-grid{grid-template-columns:repeat(2,1fr)}
  .section{padding:40px 0}
}
@media(max-width:480px){
  .expert-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .channel-grid{grid-template-columns:1fr}
  html{font-size:14px}
}

/* 懒加载 */
img[loading="lazy"]{opacity:0;transition:opacity .5s}
img[loading="lazy"].loaded,img[loading="lazy"][src]{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}