/* ========================================
   糖心vlog 全站样式表
   品牌色系：糖心粉 #FF6B9D / 深玫红 #C44569 / 暖金 #FFD93D
   背景色系：深夜蓝黑 #0D0D1A / 深蓝灰 #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","Hiragino Sans GB","Microsoft YaHei","WenQuanYi Micro Hei",sans-serif;background:#0D0D1A;color:#EAEAEA;line-height:1.7;overflow-x:hidden}
a{color:#FF6B9D;text-decoration:none;transition:color .3s}
a:hover{color:#FFD93D}
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:#fff}

/* === 容器 === */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:60px 0}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:2rem;margin-bottom:10px;position:relative;display:inline-block}
.section-title h2::after{content:'';display:block;width:60px;height:3px;background:linear-gradient(90deg,#FF6B9D,#FFD93D);margin:10px auto 0;border-radius:2px}
.section-title p{color:#A0A0B0;font-size:1rem;max-width:600px;margin:0 auto}

/* === 头部导航 === */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(13,13,26,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,107,157,.15);transition:all .3s}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;max-width:1200px;margin:0 auto;padding:0 20px}
.logo{display:flex;align-items:center;gap:10px}
.logo img{height:42px;width:auto}
.logo span{font-size:1.3rem;font-weight:700;color:#fff;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{padding:8px 16px;border-radius:8px;font-size:.9rem;color:#EAEAEA;transition:all .3s;white-space:nowrap}
.main-nav a:hover,.main-nav a.active{background:rgba(255,107,157,.15);color:#FF6B9D}
.mobile-menu-btn{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer;padding:8px}

/* === 搜索框 === */
.search-bar{background:rgba(26,26,46,.8);border-bottom:1px solid rgba(255,107,157,.1);padding:12px 0;margin-top:68px}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;max-width:560px;width:100%;position:relative}
.search-box input{flex:1;padding:10px 20px;border:2px solid rgba(255,107,157,.3);border-radius:25px 0 0 25px;background:rgba(13,13,26,.6);color:#EAEAEA;font-size:.95rem;outline:none;transition:border-color .3s}
.search-box input:focus{border-color:#FF6B9D}
.search-box input::placeholder{color:#A0A0B0}
.search-box button{padding:10px 24px;background:linear-gradient(135deg,#FF6B9D,#C44569);border:none;border-radius:0 25px 25px 0;color:#fff;font-size:.95rem;cursor:pointer;transition:opacity .3s;white-space:nowrap}
.search-box button:hover{opacity:.85}

/* === Hero Banner === */
.hero{position:relative;min-height:520px;display:flex;align-items:center;overflow:hidden;background:#0D0D1A}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.55)}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(13,13,26,.85),rgba(196,69,105,.3))}
.hero-content{position:relative;z-index:2;text-align:center;width:100%;padding:40px 20px}
.hero-content h1{font-size:2.8rem;margin-bottom:16px;text-shadow:0 2px 20px rgba(255,107,157,.4)}
.hero-content h1 .brand{color:#FF6B9D}
.hero-content p{font-size:1.15rem;color:#d0d0d8;max-width:640px;margin:0 auto 28px}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:25px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s;border:none}
.btn-primary{background:linear-gradient(135deg,#FF6B9D,#C44569);color:#fff;box-shadow:0 4px 20px rgba(255,107,157,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 28px rgba(255,107,157,.5);color:#fff}
.btn-outline{background:transparent;border:2px solid #FF6B9D;color:#FF6B9D}
.btn-outline:hover{background:#FF6B9D;color:#fff}
.btn-gold{background:linear-gradient(135deg,#FFD93D,#F0A500);color:#0D0D1A;box-shadow:0 4px 20px rgba(255,217,61,.3)}
.btn-gold:hover{transform:translateY(-2px);color:#0D0D1A}

/* === 视频卡片网格 === */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.video-card{position:relative;border-radius:12px;overflow:hidden;background:#1A1A2E;transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 36px rgba(255,107,157,.2)}
.video-card .thumb{position:relative;padding-top:56.25%;overflow:hidden}
.video-card .thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .thumb img{transform:scale(1.08)}
.video-card .play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(0);width:56px;height:56px;background:rgba(255,107,157,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:transform .3s;z-index:3}
.video-card .play-btn::after{content:'';border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:3px}
.video-card:hover .play-btn{transform:translate(-50%,-50%) scale(1)}
.video-card .duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem;z-index:3}
.video-card .card-info{padding:14px}
.video-card .card-info h3{font-size:.95rem;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-card .card-info .meta{display:flex;align-items:center;gap:12px;color:#A0A0B0;font-size:.8rem}
.video-card .card-info .meta .views::before{content:'▶ '}
.video-card .card-info .meta .likes::before{content:'♥ '}
.video-card .tag{position:absolute;top:10px;left:10px;background:linear-gradient(135deg,#FF6B9D,#C44569);color:#fff;padding:3px 10px;border-radius:12px;font-size:.72rem;z-index:3}

/* === 分类标签 === */
.category-tabs{display:flex;gap:10px;justify-content:center;margin-bottom:30px;flex-wrap:wrap}
.category-tabs .tab{padding:8px 20px;border-radius:20px;background:rgba(255,107,157,.1);color:#FF6B9D;font-size:.9rem;cursor:pointer;transition:all .3s;border:1px solid transparent}
.category-tabs .tab:hover,.category-tabs .tab.active{background:#FF6B9D;color:#fff;border-color:#FF6B9D}

/* === 特色模块卡片 === */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:linear-gradient(145deg,#1A1A2E,#16162a);border:1px solid rgba(255,107,157,.12);border-radius:16px;padding:32px 24px;text-align:center;transition:all .3s}
.feature-card:hover{border-color:rgba(255,107,157,.4);transform:translateY(-4px);box-shadow:0 8px 32px rgba(255,107,157,.15)}
.feature-card .icon{width:64px;height:64px;margin:0 auto 18px;background:linear-gradient(135deg,rgba(255,107,157,.2),rgba(196,69,105,.2));border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.8rem}
.feature-card h3{font-size:1.1rem;margin-bottom:10px}
.feature-card p{color:#A0A0B0;font-size:.9rem;line-height:1.6}

/* === 专家展示 === */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:#1A1A2E;border-radius:16px;overflow:hidden;text-align:center;transition:all .3s;border:1px solid rgba(255,107,157,.08)}
.expert-card:hover{border-color:rgba(255,107,157,.3);transform:translateY(-4px)}
.expert-card .avatar{width:100%;aspect-ratio:1;overflow:hidden}
.expert-card .avatar img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.expert-card:hover .avatar img{transform:scale(1.05)}
.expert-card .info{padding:20px 16px}
.expert-card .info h3{font-size:1.05rem;margin-bottom:4px}
.expert-card .info .role{color:#FF6B9D;font-size:.85rem;margin-bottom:8px}
.expert-card .info p{color:#A0A0B0;font-size:.82rem;line-height:1.5;margin-bottom:12px}
.expert-card .info .expert-btns{display:flex;gap:8px;justify-content:center}
.expert-card .info .expert-btns a{padding:6px 14px;border-radius:15px;font-size:.78rem}

/* === 合作品牌 === */
.partner-wall{display:flex;flex-wrap:wrap;gap:24px;justify-content:center;align-items:center}
.partner-wall .partner-item{background:rgba(26,26,46,.8);border:1px solid rgba(255,107,157,.1);border-radius:12px;padding:20px 30px;min-width:160px;text-align:center;transition:all .3s}
.partner-wall .partner-item:hover{border-color:#FF6B9D;background:rgba(255,107,157,.05)}
.partner-wall .partner-item span{font-size:1rem;font-weight:600;color:#A0A0B0}

/* === 用户评论 === */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.review-card{background:#1A1A2E;border-radius:16px;padding:28px;border:1px solid rgba(255,107,157,.08);transition:all .3s}
.review-card:hover{border-color:rgba(255,107,157,.25)}
.review-card .stars{color:#FFD93D;font-size:1rem;margin-bottom:10px;letter-spacing:2px}
.review-card .review-text{color:#d0d0d8;font-size:.92rem;line-height:1.7;margin-bottom:14px;font-style:italic}
.review-card .reviewer{display:flex;align-items:center;gap:12px}
.review-card .reviewer .avatar-sm{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#FF6B9D,#C44569);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.9rem}
.review-card .reviewer .name{font-weight:600;font-size:.9rem}
.review-card .reviewer .date{color:#A0A0B0;font-size:.78rem}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#1A1A2E;border-radius:12px;margin-bottom:12px;border:1px solid rgba(255,107,157,.08);overflow:hidden}
.faq-item .faq-q{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:.95rem;transition:background .3s}
.faq-item .faq-q:hover{background:rgba(255,107,157,.05)}
.faq-item .faq-q .arrow{transition:transform .3s;color:#FF6B9D;font-size:1.2rem}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-item .faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:all .4s ease;color:#A0A0B0;font-size:.9rem;line-height:1.7}
.faq-item.open .faq-a{padding:0 24px 18px;max-height:500px}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.contact-card{background:#1A1A2E;border-radius:16px;padding:28px;text-align:center;border:1px solid rgba(255,107,157,.08)}
.contact-card .contact-icon{font-size:2rem;margin-bottom:12px}
.contact-card h3{font-size:1.05rem;margin-bottom:8px}
.contact-card p{color:#A0A0B0;font-size:.88rem;line-height:1.6}
.contact-card a{color:#FF6B9D}

/* === 页脚 === */
.site-footer{background:#0a0a16;border-top:1px solid rgba(255,107,157,.1);padding:48px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px}
.footer-col h4{font-size:1rem;margin-bottom:16px;color:#FF6B9D}
.footer-col p{color:#A0A0B0;font-size:.85rem;line-height:1.7;margin-bottom:8px}
.footer-col a{display:block;color:#A0A0B0;font-size:.85rem;padding:4px 0;transition:color .3s}
.footer-col a:hover{color:#FF6B9D}
.footer-qr{display:flex;gap:20px;margin-top:12px}
.footer-qr .qr-item{text-align:center}
.footer-qr .qr-item img{width:110px;height:110px;border-radius:8px;margin-bottom:6px}
.footer-qr .qr-item span{display:block;font-size:.75rem;color:#A0A0B0}
.footer-bottom{border-top:1px solid rgba(255,107,157,.08);padding:20px 0;text-align:center}
.footer-bottom p{color:#A0A0B0;font-size:.82rem}
.footer-bottom .update-time{color:#FF6B9D;font-size:.8rem;margin-top:4px}
.social-share{display:flex;gap:12px;justify-content:center;margin-top:12px}
.social-share a{width:36px;height:36px;border-radius:50%;background:rgba(255,107,157,.15);display:flex;align-items:center;justify-content:center;color:#FF6B9D;font-size:.85rem;transition:all .3s}
.social-share a:hover{background:#FF6B9D;color:#fff}

/* === 面包屑 === */
.breadcrumb{padding:16px 0;font-size:.85rem;color:#A0A0B0}
.breadcrumb a{color:#FF6B9D}
.breadcrumb span{margin:0 8px;color:#555}

/* === How-To 指南 === */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.howto-step{background:#1A1A2E;border-radius:16px;padding:28px 20px;text-align:center;position:relative;border:1px solid rgba(255,107,157,.08)}
.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,#FF6B9D,#C44569);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.9rem}
.howto-step h4{margin-top:8px;margin-bottom:8px;font-size:.95rem}
.howto-step p{color:#A0A0B0;font-size:.85rem}

/* === 内页通用 === */
.page-hero{padding:100px 0 40px;text-align:center;background:linear-gradient(180deg,rgba(255,107,157,.08),transparent)}
.page-hero h1{font-size:2.2rem;margin-bottom:10px}
.page-hero p{color:#A0A0B0;max-width:600px;margin:0 auto}

/* === 响应式 === */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:repeat(2,1fr)}
  .howto-steps{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .main-nav{display:none;position:absolute;top:68px;left:0;width:100%;background:rgba(13,13,26,.98);flex-direction:column;padding:16px;gap:4px;border-bottom:1px solid rgba(255,107,157,.15)}
  .main-nav.open{display:flex}
  .main-nav a{padding:12px 16px;width:100%}
  .mobile-menu-btn{display:block}
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .hero-content h1{font-size:1.8rem}
  .review-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .feature-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .section{padding:40px 0}
  .section-title h2{font-size:1.5rem}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .hero{min-height:400px}
  .hero-content h1{font-size:1.5rem}
  .expert-grid{grid-template-columns:1fr}
  .header-inner{padding:0 12px}
}

/* === 懒加载占位 === */
img[loading="lazy"]{opacity:0;transition:opacity .4s}
img[loading="lazy"].loaded,img[loading="lazy"][src]{opacity:1}

/* === 动画 === */
@keyframes fadeInUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
.animate-in{animation:fadeInUp .6s ease forwards}

/* === MCP前端占位 === */
.mcp-widget{background:rgba(26,26,46,.5);border:1px dashed rgba(255,107,157,.2);border-radius:12px;padding:20px;text-align:center;color:#A0A0B0;font-size:.85rem;margin-top:20px}