/* ============================================
   糖心vlog - 原创样式表
   品牌色系：糖心粉 #FF6B9D / 深玫红 #C44569 / 金橙 #F8B500
   背景色系：深夜蓝黑 #0D0D1A / 暗紫蓝 #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","Helvetica Neue",Arial,sans-serif;background:#0D0D1A;color:#E0E0E0;line-height:1.7;overflow-x:hidden}
a{color:#FF6B9D;text-decoration:none;transition:color .3s}
a:hover{color:#F8B500}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{color:#FFFFFF;font-weight:700;line-height:1.3}

/* === 容器 === */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:60px 0}
.section-title{font-size:2rem;text-align:center;margin-bottom:40px;position:relative}
.section-title::after{content:"";display:block;width:80px;height:3px;background:linear-gradient(90deg,#FF6B9D,#F8B500);margin:12px auto 0}
.section-subtitle{text-align:center;color:#aaa;font-size:1rem;margin-top:-30px;margin-bottom:35px}

/* === 顶部导航 === */
.top-bar{background:rgba(13,13,26,.95);backdrop-filter:blur(10px);position:fixed;top:0;left:0;width:100%;z-index:1000;border-bottom:1px solid rgba(255,107,157,.15)}
.top-bar .container{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px}
.brand img{height:40px;width:auto}
.brand span{font-size:1.3rem;font-weight:700;color:#FF6B9D}
.nav-links{display:flex;gap:24px;align-items:center}
.nav-links a{color:#E0E0E0;font-size:.95rem;padding:6px 0;position:relative}
.nav-links a::after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background:#FF6B9D;transition:width .3s}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.nav-links a:hover{color:#FF6B9D}
.mobile-toggle{display:none;font-size:1.5rem;color:#FF6B9D;cursor:pointer;background:none;border:none}

/* === 搜索框 === */
.search-bar{background:linear-gradient(135deg,#1A1A2E 0%,#16213E 100%);padding:14px 0;border-bottom:1px solid rgba(255,107,157,.1)}
.search-bar .container{display:flex;justify-content:center}
.search-wrap{display:flex;max-width:600px;width:100%;border-radius:30px;overflow:hidden;border:2px solid #FF6B9D;background:#0D0D1A}
.search-wrap input{flex:1;padding:10px 20px;background:transparent;border:none;color:#fff;font-size:.95rem;outline:none}
.search-wrap input::placeholder{color:#888}
.search-wrap button{padding:10px 28px;background:linear-gradient(135deg,#FF6B9D,#C44569);color:#fff;border:none;cursor:pointer;font-size:.95rem;transition:opacity .3s}
.search-wrap button:hover{opacity:.85}

/* === Hero区域 === */
.hero{position:relative;margin-top:64px;height:520px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hero-bg{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;filter:brightness(.45)}
.hero-content{position:relative;z-index:2;text-align:center;padding:0 20px}
.hero-content h1{font-size:2.8rem;margin-bottom:16px;text-shadow:0 2px 20px rgba(255,107,157,.4)}
.hero-content h1 .highlight{color:#FF6B9D}
.hero-content p{font-size:1.15rem;color:#ccc;max-width:700px;margin:0 auto 24px}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 32px;border-radius:30px;font-size:1rem;font-weight:600;transition:all .3s;cursor:pointer;border:none}
.btn-primary{background:linear-gradient(135deg,#FF6B9D,#C44569);color:#fff}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(255,107,157,.4);color:#fff}
.btn-outline{border:2px solid #FF6B9D;color:#FF6B9D;background:transparent}
.btn-outline:hover{background:#FF6B9D;color:#fff}

/* === 面包屑 === */
.breadcrumb{padding:12px 0;font-size:.85rem;color:#888}
.breadcrumb a{color:#FF6B9D}
.breadcrumb span{margin:0 6px;color:#555}

/* === 视频卡片网格 === */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.video-card{background:#1A1A2E;border-radius:12px;overflow:hidden;transition:transform .3s,box-shadow .3s;cursor:pointer;position:relative}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 30px rgba(255,107,157,.2)}
.video-card .thumb{position:relative;padding-top:56.25%;overflow:hidden}
.video-card .thumb img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .thumb img{transform:scale(1.05)}
.video-card .play-icon{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:50px;height:50px;background:rgba(255,107,157,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s}
.video-card:hover .play-icon{opacity:1}
.play-icon::after{content:"";border-style:solid;border-width:8px 0 8px 14px;border-color:transparent transparent transparent #fff;margin-left:3px}
.video-card .card-body{padding:14px}
.video-card .card-title{font-size:.95rem;color:#fff;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-card .card-meta{display:flex;justify-content:space-between;font-size:.8rem;color:#888}
.video-card .card-tags{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.video-card .tag{font-size:.7rem;padding:2px 8px;border-radius:10px;background:rgba(255,107,157,.15);color:#FF6B9D}

/* === 三列网格 === */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}

/* === 模块卡片 === */
.module-card{background:#1A1A2E;border-radius:12px;padding:30px;text-align:center;transition:transform .3s,box-shadow .3s;border:1px solid rgba(255,107,157,.08)}
.module-card:hover{transform:translateY(-4px);box-shadow:0 8px 25px rgba(255,107,157,.15)}
.module-card .icon{font-size:2.5rem;margin-bottom:16px}
.module-card h3{font-size:1.1rem;margin-bottom:10px;color:#FF6B9D}
.module-card p{font-size:.9rem;color:#aaa}

/* === 专家卡片 === */
.expert-card{background:#1A1A2E;border-radius:12px;overflow:hidden;text-align:center;transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-card .avatar{width:120px;height:120px;border-radius:50%;margin:24px auto 16px;border:3px solid #FF6B9D;overflow:hidden}
.expert-card .avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h4{color:#fff;font-size:1.05rem}
.expert-card .role{color:#FF6B9D;font-size:.85rem;margin:4px 0 8px}
.expert-card .desc{font-size:.85rem;color:#aaa;padding:0 20px;margin-bottom:16px}
.expert-card .expert-btns{display:flex;gap:10px;justify-content:center;padding:0 20px 24px}
.expert-card .expert-btns a{padding:6px 16px;border-radius:20px;font-size:.8rem}

/* === FAQ === */
.faq-item{background:#1A1A2E;border-radius:10px;margin-bottom:12px;overflow:hidden;border:1px solid rgba(255,107,157,.08)}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:#fff;transition:background .3s}
.faq-question:hover{background:rgba(255,107,157,.05)}
.faq-question .arrow{transition:transform .3s;color:#FF6B9D;font-size:1.2rem}
.faq-item.active .faq-question .arrow{transform:rotate(180deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease;color:#aaa;font-size:.9rem;line-height:1.8}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 18px}

/* === 用户评论 === */
.review-card{background:#1A1A2E;border-radius:12px;padding:24px;border:1px solid rgba(255,107,157,.08)}
.review-card .stars{color:#F8B500;margin-bottom:10px;font-size:1.1rem}
.review-card .review-text{font-size:.9rem;color:#ccc;margin-bottom:14px;font-style:italic;line-height:1.8}
.review-card .reviewer{display:flex;align-items:center;gap:10px}
.review-card .reviewer-avatar{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-size:.85rem;color:#fff}
.review-card .reviewer-date{font-size:.75rem;color:#888}

/* === 合作品牌 === */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-wall .partner-item{background:#1A1A2E;border-radius:10px;padding:16px 28px;font-size:1rem;color:#aaa;border:1px solid rgba(255,107,157,.08);transition:all .3s}
.partner-wall .partner-item:hover{border-color:#FF6B9D;color:#FF6B9D}

/* === 联系信息 === */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.contact-box{background:#1A1A2E;border-radius:12px;padding:30px}
.contact-box h3{color:#FF6B9D;margin-bottom:16px;font-size:1.1rem}
.contact-box .info-line{display:flex;align-items:center;gap:10px;margin-bottom:12px;font-size:.9rem;color:#ccc}
.contact-box .info-line .label{color:#888;min-width:70px}

/* === 分享按钮 === */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:20px;font-size:.85rem;color:#fff;transition:all .3s}
.share-btn:hover{transform:translateY(-2px);color:#fff}
.share-btn.wechat{background:#07C160}
.share-btn.weibo{background:#E6162D}
.share-btn.douyin{background:#161823}
.share-btn.bilibili{background:#00A1D6}

/* === 页脚 === */
.footer{background:#0A0A15;border-top:1px solid rgba(255,107,157,.1);padding:50px 0 20px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:40px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:.85rem;color:#888;line-height:1.8}
.footer h4{color:#FF6B9D;margin-bottom:16px;font-size:1rem}
.footer ul li{margin-bottom:8px}
.footer ul li a{color:#888;font-size:.85rem}
.footer ul li a:hover{color:#FF6B9D}
.footer-qr{display:flex;gap:20px}
.footer-qr .qr-item{text-align:center}
.footer-qr .qr-item img{width:120px;height:120px;border-radius:8px;margin-bottom:6px}
.footer-qr .qr-item span{font-size:.75rem;color:#888}
.footer-bottom{border-top:1px solid rgba(255,107,157,.08);padding-top:20px;text-align:center;font-size:.8rem;color:#666}
.footer-bottom a{color:#FF6B9D}

/* === 内页banner === */
.page-banner{margin-top:64px;height:300px;position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center}
.page-banner img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;filter:brightness(.4)}
.page-banner .banner-text{position:relative;z-index:2;text-align:center}
.page-banner h1{font-size:2.2rem;margin-bottom:8px}

/* === 视频播放页 === */
.video-player-wrap{max-width:900px;margin:0 auto;background:#000;border-radius:12px;overflow:hidden;margin-bottom:30px}
.video-player-wrap video{width:100%;display:block}
.video-info{max-width:900px;margin:0 auto}
.video-info h2{font-size:1.5rem;margin-bottom:12px}
.video-stats{display:flex;gap:24px;margin-bottom:20px;color:#888;font-size:.9rem}
.video-desc{font-size:.95rem;color:#ccc;line-height:1.8;margin-bottom:30px}

/* === 滚动条 === */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:#0D0D1A}
::-webkit-scrollbar-thumb{background:#FF6B9D;border-radius:3px}

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

/* === 数据统计 === */
.stats-bar{display:flex;justify-content:center;gap:50px;padding:30px 0;flex-wrap:wrap}
.stat-item{text-align:center}
.stat-item .num{font-size:2.2rem;font-weight:700;color:#FF6B9D}
.stat-item .label{font-size:.85rem;color:#888;margin-top:4px}

/* === How-To指南 === */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step-card{background:#1A1A2E;border-radius:12px;padding:24px;text-align:center;position:relative}
.step-card .step-num{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#FF6B9D,#C44569);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;margin:0 auto 14px}
.step-card h4{color:#fff;margin-bottom:8px;font-size:1rem}
.step-card p{font-size:.85rem;color:#aaa}

/* === 响应式 === */
@media(max-width:1024px){
    .video-grid{grid-template-columns:repeat(3,1fr)}
    .footer-grid{grid-template-columns:1fr 1fr}
    .howto-steps{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
    .video-grid{grid-template-columns:repeat(2,1fr)}
    .grid-3{grid-template-columns:1fr}
    .contact-grid{grid-template-columns:1fr}
    .nav-links{display:none;position:absolute;top:64px;left:0;width:100%;background:#0D0D1A;flex-direction:column;padding:20px;gap:16px;border-bottom:1px solid rgba(255,107,157,.15)}
    .nav-links.show{display:flex}
    .mobile-toggle{display:block}
    .hero{height:400px}
    .hero-content h1{font-size:1.8rem}
    .footer-grid{grid-template-columns:1fr}
    .stats-bar{gap:24px}
    .howto-steps{grid-template-columns:1fr}
    .section-title{font-size:1.5rem}
}
@media(max-width:480px){
    .video-grid{grid-template-columns:1fr}
    .hero{height:320px}
    .hero-content h1{font-size:1.5rem}
}

/* === 懒加载 === */
img[data-src]{opacity:0;transition:opacity .4s}
img.loaded{opacity:1}

/* === 视频标签高亮 === */
.video-badge{position:absolute;top:10px;left:10px;background:linear-gradient(135deg,#FF6B9D,#C44569);color:#fff;font-size:.7rem;padding:3px 10px;border-radius:12px;z-index:3;font-weight:600}

/* === MCP前端占位 === */
.054cs{background:#1A1A2E;border-radius:12px;padding:20px;margin-top:20px;border:1px solid rgba(255,107,157,.08);text-align:center;color:#888;font-size:.85rem}