/* ============================================
   糖心vlog - 原创样式表
   品牌色彩：糖心粉红 #E8436F / 深紫夜色 #2D1B4E / 暖橙 #FF8C42
   ============================================ */

/* === 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;background:#0F0A1A;color:#F5F0FF;line-height:1.7;overflow-x:hidden}
a{color:#E8436F;text-decoration:none;transition:color .3s}
a:hover{color:#FF8C42}
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:#F5F0FF}

/* === 容器 === */
.container{width:100%;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(15,10,26,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(232,67,111,.15);transition:background .3s}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{height:42px;width:auto;border-radius:8px}
.logo-wrap span{font-size:1.3rem;font-weight:800;background:linear-gradient(135deg,#E8436F,#FF8C42);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{padding:8px 14px;border-radius:6px;font-size:.92rem;color:#A89BC7;transition:all .3s;white-space:nowrap}
.main-nav a:hover,.main-nav a.active{color:#F5F0FF;background:rgba(232,67,111,.15)}
.search-box{position:relative;margin-left:12px}
.search-box input{width:180px;padding:7px 34px 7px 14px;border:1px solid rgba(232,67,111,.3);border-radius:20px;background:rgba(26,18,48,.8);color:#F5F0FF;font-size:.85rem;outline:none;transition:border-color .3s}
.search-box input:focus{border-color:#E8436F;width:220px}
.search-box input::placeholder{color:#A89BC7}
.search-box button{position:absolute;right:8px;top:50%;transform:translateY(-50%);background:none;border:none;color:#E8436F;cursor:pointer;font-size:1rem}
.mobile-toggle{display:none;background:none;border:none;color:#F5F0FF;font-size:1.5rem;cursor:pointer}

/* === Hero 区域 === */
.hero-section{position:relative;min-height:520px;display:flex;align-items:center;justify-content:center;text-align:center;margin-top:68px;overflow:hidden;background:#0F0A1A}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.55;transition:opacity .5s}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,10,26,.3) 0%,rgba(15,10,26,.85) 100%)}
.hero-content{position:relative;z-index:2;padding:60px 20px}
.hero-content h1{font-size:2.8rem;margin-bottom:16px;text-shadow:0 2px 20px rgba(232,67,111,.4)}
.hero-content h1 .brand-highlight{background:linear-gradient(135deg,#E8436F,#FF8C42);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-content p{font-size:1.15rem;color:#A89BC7;max-width:680px;margin:0 auto 28px}
.hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:28px}
.hero-tags span{padding:5px 16px;border-radius:20px;font-size:.82rem;background:rgba(232,67,111,.12);color:#E8436F;border:1px solid rgba(232,67,111,.25)}
.btn-primary{display:inline-block;padding:12px 36px;border-radius:28px;font-size:1rem;font-weight:600;color:#fff;background:linear-gradient(135deg,#E8436F,#FF8C42);box-shadow:0 4px 20px rgba(232,67,111,.35);transition:transform .3s,box-shadow .3s;cursor:pointer;border:none}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 28px rgba(232,67,111,.5);color:#fff}
.btn-outline{display:inline-block;padding:10px 28px;border-radius:28px;font-size:.92rem;font-weight:600;color:#E8436F;border:2px solid #E8436F;background:transparent;transition:all .3s;cursor:pointer}
.btn-outline:hover{background:#E8436F;color:#fff}

/* === 通用区块 === */
.section{padding:70px 0}
.section-header{text-align:center;margin-bottom:45px}
.section-header h2{font-size:2rem;margin-bottom:10px}
.section-header h2 .accent{color:#E8436F}
.section-header p{color:#A89BC7;font-size:1rem;max-width:600px;margin:0 auto}
.section-alt{background:#120D22}

/* === 视频卡片网格 === */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.video-card{position:relative;border-radius:12px;overflow:hidden;background:#1A1230;transition:transform .35s,box-shadow .35s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 36px rgba(232,67,111,.2)}
.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(1.06)}
.play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;background:rgba(15,10,26,.5)}
.video-card:hover .play-btn{opacity:1}
.play-btn span{width:52px;height:52px;border-radius:50%;background:rgba(232,67,111,.9);display:flex;align-items:center;justify-content:center;font-size:1.3rem;color:#fff;box-shadow:0 4px 16px rgba(232,67,111,.4)}
.video-info{padding:14px 16px}
.video-info h3{font-size:.95rem;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:14px;color:#A89BC7;font-size:.78rem}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tag{position:absolute;top:10px;left:10px;padding:3px 10px;border-radius:4px;font-size:.72rem;background:rgba(232,67,111,.85);color:#fff;z-index:3}

/* === 服务模块 === */
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.service-card{padding:32px 26px;border-radius:14px;background:linear-gradient(145deg,#1A1230,#150E28);border:1px solid rgba(232,67,111,.1);transition:all .35s;text-align:center}
.service-card:hover{border-color:rgba(232,67,111,.35);transform:translateY(-4px);box-shadow:0 8px 30px rgba(232,67,111,.12)}
.service-icon{width:64px;height:64px;margin:0 auto 18px;border-radius:16px;background:linear-gradient(135deg,rgba(232,67,111,.15),rgba(255,140,66,.1));display:flex;align-items:center;justify-content:center;font-size:1.8rem}
.service-card h3{font-size:1.1rem;margin-bottom:10px}
.service-card p{color:#A89BC7;font-size:.88rem;line-height:1.6}

/* === AI赋能 === */
.ai-showcase{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center}
.ai-showcase img{border-radius:14px;box-shadow:0 8px 30px rgba(0,0,0,.3)}
.ai-features{display:flex;flex-direction:column;gap:20px}
.ai-feature-item{padding:18px 22px;border-radius:10px;background:rgba(26,18,48,.6);border-left:3px solid #E8436F;transition:background .3s}
.ai-feature-item:hover{background:rgba(232,67,111,.08)}
.ai-feature-item h4{font-size:1rem;margin-bottom:6px}
.ai-feature-item p{color:#A89BC7;font-size:.85rem}

/* === 社区互动 === */
.community-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.community-card{position:relative;border-radius:14px;overflow:hidden;min-height:260px;display:flex;align-items:flex-end}
.community-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.community-card .overlay{position:absolute;inset:0;background:linear-gradient(0deg,rgba(15,10,26,.9) 0%,transparent 60%)}
.community-card .content{position:relative;z-index:2;padding:24px}
.community-card h3{font-size:1.2rem;margin-bottom:8px}
.community-card p{color:#A89BC7;font-size:.88rem}

/* === 专家团队 === */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.expert-card{text-align:center;padding:28px 20px;border-radius:14px;background:#1A1230;border:1px solid rgba(232,67,111,.08);transition:all .35s}
.expert-card:hover{border-color:rgba(232,67,111,.3);transform:translateY(-4px)}
.expert-avatar{width:100px;height:100px;border-radius:50%;margin:0 auto 16px;overflow:hidden;border:3px solid rgba(232,67,111,.3)}
.expert-avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h3{font-size:1rem;margin-bottom:4px}
.expert-card .title{color:#E8436F;font-size:.82rem;margin-bottom:8px}
.expert-card p{color:#A89BC7;font-size:.8rem;line-height:1.5}
.expert-links{margin-top:14px;display:flex;justify-content:center;gap:10px}
.expert-links a{padding:5px 14px;border-radius:16px;font-size:.78rem;border:1px solid rgba(232,67,111,.3);color:#E8436F;transition:all .3s}
.expert-links a:hover{background:#E8436F;color:#fff}

/* === 合作品牌 === */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-item{width:140px;height:70px;border-radius:10px;background:rgba(26,18,48,.6);border:1px solid rgba(232,67,111,.1);display:flex;align-items:center;justify-content:center;font-size:.9rem;color:#A89BC7;font-weight:600;transition:all .3s}
.partner-item:hover{border-color:#E8436F;color:#E8436F}

/* === 用户评价 === */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.review-card{padding:24px;border-radius:12px;background:#1A1230;border:1px solid rgba(232,67,111,.08)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.review-avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#E8436F,#FF8C42);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1rem}
.review-name{font-weight:600;font-size:.92rem}
.review-date{color:#A89BC7;font-size:.75rem}
.review-stars{color:#FF8C42;font-size:.85rem;margin-bottom:8px}
.review-text{color:#A89BC7;font-size:.88rem;line-height:1.65}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{border-radius:10px;background:#1A1230;border:1px solid rgba(232,67,111,.08);overflow:hidden}
.faq-question{padding:18px 22px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:.95rem;transition:background .3s}
.faq-question:hover{background:rgba(232,67,111,.06)}
.faq-question .icon{color:#E8436F;font-size:1.2rem;transition:transform .3s}
.faq-item.active .faq-question .icon{transform:rotate(45deg)}
.faq-answer{padding:0 22px;max-height:0;overflow:hidden;transition:all .35s ease;color:#A89BC7;font-size:.88rem;line-height:1.7}
.faq-item.active .faq-answer{padding:0 22px 18px;max-height:300px}

/* === 联系信息 === */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.contact-card{padding:28px;border-radius:14px;background:#1A1230;text-align:center;border:1px solid rgba(232,67,111,.08)}
.contact-card h3{font-size:1.05rem;margin-bottom:14px;color:#E8436F}
.contact-card p{color:#A89BC7;font-size:.88rem;margin-bottom:6px}
.contact-card img{max-width:160px;margin:10px auto;border-radius:10px}

/* === 社交分享 === */
.share-bar{display:flex;justify-content:center;gap:14px;padding:20px 0}
.share-btn{width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1rem;color:#F5F0FF;transition:all .3s;border:1px solid rgba(232,67,111,.2)}
.share-btn:hover{background:#E8436F;border-color:#E8436F;transform:scale(1.1)}

/* === 页脚 === */
.site-footer{background:#0A0714;padding:50px 0 0;border-top:1px solid rgba(232,67,111,.1)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;margin-bottom:36px}
.footer-brand .logo-wrap{margin-bottom:14px}
.footer-brand p{color:#A89BC7;font-size:.85rem;line-height:1.6}
.footer-col h4{font-size:.95rem;margin-bottom:16px;color:#E8436F}
.footer-col a{display:block;color:#A89BC7;font-size:.85rem;margin-bottom:8px;transition:color .3s}
.footer-col a:hover{color:#F5F0FF}
.footer-qr{display:flex;gap:20px;margin-top:16px}
.footer-qr img{width:120px;border-radius:8px}
.footer-bottom{border-top:1px solid rgba(232,67,111,.08);padding:20px 0;text-align:center;color:#A89BC7;font-size:.82rem}
.footer-bottom a{color:#E8436F}

/* === 面包屑 === */
.breadcrumb{padding:14px 0;font-size:.84rem;color:#A89BC7}
.breadcrumb a{color:#E8436F}
.breadcrumb span{margin:0 8px;color:#A89BC7}

/* === 内页通用 === */
.page-banner{position:relative;min-height:300px;display:flex;align-items:center;justify-content:center;text-align:center;margin-top:68px;overflow:hidden}
.page-banner .bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.4}
.page-banner .overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,10,26,.4),rgba(15,10,26,.9))}
.page-banner .content{position:relative;z-index:2;padding:40px 20px}
.page-banner h1{font-size:2.2rem;margin-bottom:10px}
.page-content{padding:50px 0}
.page-content p{color:#A89BC7;font-size:.95rem;line-height:1.8;margin-bottom:18px}

/* === 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}
}
@media(max-width:768px){
  .site-header .container{flex-wrap:wrap}
  .main-nav{display:none;width:100%;flex-direction:column;padding:10px 0;order:3}
  .main-nav.active{display:flex}
  .mobile-toggle{display:block}
  .search-box{order:2;margin-left:auto;margin-right:10px}
  .search-box input{width:140px}
  .search-box input:focus{width:160px}
  .hero-content h1{font-size:1.8rem}
  .video-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .service-grid{grid-template-columns:1fr}
  .ai-showcase{grid-template-columns:1fr}
  .community-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}
  .section{padding:45px 0}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr 1fr;gap:10px}
  .expert-grid{grid-template-columns:1fr}
  .hero-content h1{font-size:1.5rem}
}

/* === 动画 === */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.fade-in{opacity:0;transform:translateY(30px);transition:opacity .6s,transform .6s}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* === How-To 指南 === */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:30px}
.howto-step{text-align:center;padding:24px 16px;border-radius:12px;background:#1A1230;border:1px solid rgba(232,67,111,.08)}
.howto-step .step-num{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#E8436F,#FF8C42);display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-weight:700;color:#fff}
.howto-step h4{font-size:.92rem;margin-bottom:6px}
.howto-step p{color:#A89BC7;font-size:.82rem}
@media(max-width:768px){.howto-steps{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.howto-steps{grid-template-columns:1fr}}

/* === 懒加载 === */
img[data-src]{opacity:0;transition:opacity .5s}
img[data-src].loaded,img:not([data-src]){opacity:1}

/* === 新闻动态模块 === */
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.news-card{padding:24px;border-radius:12px;background:#1A1230;border:1px solid rgba(232,67,111,.08);transition:all .35s}
.news-card:hover{border-color:rgba(232,67,111,.3);transform:translateY(-3px)}
.news-card time{display:block;color:#E8436F;font-size:.78rem;margin-bottom:8px}
.news-card h3{font-size:1rem;margin-bottom:8px;line-height:1.4}
.news-card p{color:#A89BC7;font-size:.85rem;line-height:1.6;margin-bottom:10px}
.news-tag{display:inline-block;padding:2px 10px;border-radius:4px;font-size:.72rem;background:rgba(232,67,111,.12);color:#E8436F}
@media(max-width:768px){.news-grid{grid-template-columns:1fr}}

/* === 视频卡片 video 标签适配 === */
.video-thumb video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s;background:#0F0A1A}
.video-card:hover .video-thumb video{transform:scale(1.06)}

/* === 视频创作者信息 === */
.video-author{color:#E8436F;font-size:.75rem;font-weight:600}
.video-date{display:block;color:#A89BC7;font-size:.72rem;margin-top:4px}

/* === 5列专家网格 === */
.expert-grid-5{grid-template-columns:repeat(5,1fr)}
@media(max-width:1024px){.expert-grid-5{grid-template-columns:repeat(3,1fr)}}
@media(max-width:768px){.expert-grid-5{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.expert-grid-5{grid-template-columns:1fr}}

/* === 404页面 === */
.error-page{min-height:60vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:60px 20px;margin-top:68px}
.error-page h1{font-size:6rem;background:linear-gradient(135deg,#E8436F,#FF8C42);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:16px}
.error-page h2{font-size:1.6rem;margin-bottom:14px}
.error-page p{color:#A89BC7;font-size:1rem;margin-bottom:28px;max-width:500px}