/* ============================================
   大奶 - 原创样式表
   品牌色系：珊瑚粉 #FF6B81 / 深玫红 #E84393 / 暖橙 #FD79A8 / 深色 #2D3436 / 浅灰 #F5F6FA
   ============================================ */

/* === 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:#2D3436;background:#F5F6FA;line-height:1.7;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:color .3s}
a:hover{color:#FF6B81}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* === 顶部导航 === */
.site-header{background:linear-gradient(135deg,#2D3436 0%,#1a1a2e 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:0 20px;max-width:1200px;margin:0 auto;height:68px}
.logo-area{display:flex;align-items:center;gap:10px}
.logo-area img{height:42px;width:auto}
.logo-area .brand-name{font-size:22px;font-weight:700;color:#FF6B81;letter-spacing:1px}
.main-nav{display:flex;gap:0}
.main-nav a{color:#dfe6e9;padding:22px 16px;font-size:14px;font-weight:500;transition:all .3s;position:relative}
.main-nav a:hover,.main-nav a.active{color:#FF6B81;background:rgba(255,107,129,.08)}
.main-nav a::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:3px;background:#FF6B81;border-radius:2px;transition:width .3s}
.main-nav a:hover::after,.main-nav a.active::after{width:60%}
.mobile-menu-btn{display:none;background:none;border:none;color:#fff;font-size:24px;cursor:pointer}

/* === 搜索框 === */
.search-bar{background:linear-gradient(90deg,#FF6B81 0%,#E84393 100%);padding:12px 0}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;max-width:600px;width:100%;background:#fff;border-radius:25px;overflow:hidden;box-shadow:0 2px 15px rgba(232,67,147,.3)}
.search-box input{flex:1;border:none;padding:10px 20px;font-size:15px;outline:none;color:#2D3436}
.search-box input::placeholder{color:#b2bec3}
.search-box button{background:#FF6B81;color:#fff;border:none;padding:10px 25px;cursor:pointer;font-size:14px;font-weight:600;transition:background .3s}
.search-box button:hover{background:#E84393}

/* === Hero区域 === */
.hero-section{position:relative;overflow:hidden;height:520px}
.hero-section img{width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(to right,rgba(45,52,54,.85) 0%,rgba(45,52,54,.4) 50%,transparent 100%);display:flex;align-items:center}
.hero-content{max-width:1200px;margin:0 auto;padding:0 40px;color:#fff}
.hero-content h1{font-size:42px;font-weight:800;margin-bottom:12px;text-shadow:0 2px 10px rgba(0,0,0,.3)}
.hero-content h1 span{color:#FF6B81}
.hero-content p{font-size:18px;max-width:520px;margin-bottom:24px;opacity:.9;line-height:1.8}
.hero-btns{display:flex;gap:15px}
.btn-primary{display:inline-block;background:linear-gradient(135deg,#FF6B81,#E84393);color:#fff;padding:12px 32px;border-radius:25px;font-weight:600;font-size:15px;transition:transform .3s,box-shadow .3s;border:none;cursor:pointer}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(255,107,129,.4);color:#fff}
.btn-outline{display:inline-block;border:2px solid #fff;color:#fff;padding:10px 30px;border-radius:25px;font-weight:600;font-size:15px;transition:all .3s}
.btn-outline:hover{background:#fff;color:#2D3436}

/* === 数据统计条 === */
.stats-bar{background:#fff;padding:25px 0;box-shadow:0 2px 15px rgba(0,0,0,.05)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat-item .stat-num{font-size:32px;font-weight:800;color:#FF6B81;display:block}
.stat-item .stat-label{font-size:14px;color:#636e72;margin-top:4px}

/* === 通用区块 === */
.section{padding:60px 0}
.section-alt{background:#fff}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:30px;font-weight:700;color:#2D3436;margin-bottom:8px}
.section-title h2 span{color:#FF6B81}
.section-title p{color:#636e72;font-size:15px;max-width:600px;margin:0 auto}
.section-title .tag{display:inline-block;background:linear-gradient(135deg,#FF6B81,#E84393);color:#fff;padding:4px 16px;border-radius:20px;font-size:12px;font-weight:600;margin-bottom:10px}

/* === 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,.06);transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 35px rgba(255,107,129,.15)}
.video-card a{display:block;color:inherit}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#1a1a2e}
.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(1.08)}
.play-icon{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:50px;height:50px;background:rgba(255,107,129,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s}
.play-icon::after{content:'';border-left:18px solid #fff;border-top:11px solid transparent;border-bottom:11px solid transparent;margin-left:4px}
.video-card:hover .play-icon{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}
.video-info{padding:14px 16px}
.video-info h3{font-size:15px;font-weight:600;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.5}
.video-meta{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:#b2bec3}
.video-meta .views{display:flex;align-items:center;gap:4px}
.video-meta .likes{color:#FF6B81}
.video-tag{display:inline-block;background:#FFF0F3;color:#FF6B81;padding:2px 8px;border-radius:10px;font-size:11px;margin-top:6px}

/* === 分类导航 === */
.category-tabs{display:flex;gap:12px;justify-content:center;margin-bottom:30px;flex-wrap:wrap}
.category-tabs a{padding:8px 22px;border-radius:20px;font-size:14px;font-weight:500;background:#f0f0f0;color:#636e72;transition:all .3s}
.category-tabs a:hover,.category-tabs a.active{background:linear-gradient(135deg,#FF6B81,#E84393);color:#fff}

/* === 专家展示 === */
.expert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.expert-card{background:#fff;border-radius:16px;padding:30px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-card img{width:100px;height:100px;border-radius:50%;object-fit:cover;margin:0 auto 15px;border:3px solid #FF6B81}
.expert-card h4{font-size:18px;font-weight:700;margin-bottom:4px}
.expert-card .role{color:#FF6B81;font-size:13px;font-weight:600;margin-bottom:10px}
.expert-card p{font-size:13px;color:#636e72;line-height:1.7;margin-bottom:15px}
.expert-card .awards{font-size:12px;color:#E84393;margin-bottom:12px}
.expert-btns{display:flex;gap:10px;justify-content:center}
.expert-btns a{padding:6px 16px;border-radius:15px;font-size:12px;font-weight:600}
.expert-btns .btn-sm-primary{background:#FF6B81;color:#fff}
.expert-btns .btn-sm-outline{border:1px solid #FF6B81;color:#FF6B81}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:12px;margin-bottom:12px;overflow:hidden;box-shadow:0 2px 10px rgba(0,0,0,.04)}
.faq-item .faq-q{padding:18px 24px;font-weight:600;font-size:15px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .3s}
.faq-item .faq-q:hover{background:#FFF0F3}
.faq-item .faq-q .arrow{transition:transform .3s;color:#FF6B81;font-size:18px}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-item .faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s;font-size:14px;color:#636e72;line-height:1.8}
.faq-item.open .faq-a{max-height:300px;padding:0 24px 18px}

/* === 用户评论 === */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.review-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 15px rgba(0,0,0,.05)}
.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,#FF6B81,#E84393);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:16px}
.review-name{font-weight:600;font-size:14px}
.review-date{font-size:12px;color:#b2bec3}
.review-stars{color:#fdcb6e;font-size:14px;margin-bottom:8px}
.review-text{font-size:14px;color:#636e72;line-height:1.8}

/* === 合作品牌 === */
.brand-wall{display:flex;gap:30px;justify-content:center;align-items:center;flex-wrap:wrap;padding:20px 0}
.brand-wall .brand-item{background:#fff;padding:15px 30px;border-radius:10px;box-shadow:0 2px 10px rgba(0,0,0,.05);font-size:16px;font-weight:700;color:#636e72;transition:all .3s}
.brand-wall .brand-item:hover{color:#FF6B81;box-shadow:0 4px 20px rgba(255,107,129,.15)}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.contact-card{background:#fff;border-radius:16px;padding:30px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.contact-card h3{font-size:20px;font-weight:700;margin-bottom:15px;color:#2D3436}
.contact-card h3 span{color:#FF6B81}
.contact-info-item{display:flex;align-items:flex-start;gap:12px;margin-bottom:12px;font-size:14px;color:#636e72}
.contact-info-item .icon{width:36px;height:36px;background:#FFF0F3;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#FF6B81;font-weight:700;flex-shrink:0}
.qr-group{display:flex;gap:20px;margin-top:15px}
.qr-group .qr-item{text-align:center}
.qr-group .qr-item img{width:140px;height:140px;border-radius:8px;margin-bottom:6px}
.qr-group .qr-item span{font-size:12px;color:#636e72}

/* === How-To指南 === */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:30px}
.howto-step{text-align:center;padding:24px;background:#fff;border-radius:12px;box-shadow:0 4px 15px rgba(0,0,0,.05)}
.howto-step .step-num{width:48px;height:48px;background:linear-gradient(135deg,#FF6B81,#E84393);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:800;margin:0 auto 12px}
.howto-step h4{font-size:15px;font-weight:700;margin-bottom:8px}
.howto-step p{font-size:13px;color:#636e72;line-height:1.6}

/* === 社交分享 === */
.share-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:25px;font-size:13px;font-weight:600;color:#fff;transition:transform .3s}
.share-btn:hover{transform:translateY(-2px);color:#fff}
.share-btn.wechat{background:#07C160}
.share-btn.weibo{background:#E6162D}
.share-btn.douyin{background:#000}
.share-btn.bilibili{background:#00A1D6}

/* === 页脚 === */
.site-footer{background:linear-gradient(135deg,#2D3436,#1a1a2e);color:#dfe6e9;padding:50px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand .footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:15px}
.footer-brand .footer-logo img{height:36px}
.footer-brand .footer-logo span{font-size:20px;font-weight:700;color:#FF6B81}
.footer-brand p{font-size:13px;color:#b2bec3;line-height:1.8;margin-bottom:15px}
.footer-col h4{font-size:16px;font-weight:700;color:#fff;margin-bottom:15px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:3px;background:#FF6B81;border-radius:2px}
.footer-col a{display:block;font-size:13px;color:#b2bec3;padding:4px 0;transition:color .3s}
.footer-col a:hover{color:#FF6B81}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;text-align:center;font-size:13px;color:#636e72}
.footer-bottom a{color:#FF6B81}

/* === 面包屑 === */
.breadcrumb{padding:15px 0;font-size:13px;color:#b2bec3}
.breadcrumb a{color:#FF6B81}
.breadcrumb span{margin:0 6px;color:#dfe6e9}

/* === 内页视频播放 === */
.video-player-wrap{background:#000;border-radius:12px;overflow:hidden;margin-bottom:30px;position:relative;padding-top:56.25%}
.video-player-wrap video{position:absolute;inset:0;width:100%;height:100%}
.video-detail-info{background:#fff;border-radius:12px;padding:30px;margin-bottom:30px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.video-detail-info h1{font-size:24px;font-weight:700;margin-bottom:10px}
.video-detail-meta{display:flex;gap:20px;font-size:13px;color:#b2bec3;margin-bottom:15px;flex-wrap:wrap}
.video-detail-meta span{display:flex;align-items:center;gap:4px}
.video-detail-desc{font-size:14px;color:#636e72;line-height:1.9}

/* === 侧边栏 === */
.page-layout{display:grid;grid-template-columns:1fr 340px;gap:30px}
.sidebar .widget{background:#fff;border-radius:12px;padding:20px;margin-bottom:20px;box-shadow:0 4px 15px rgba(0,0,0,.05)}
.sidebar .widget h3{font-size:16px;font-weight:700;margin-bottom:15px;padding-bottom:10px;border-bottom:2px solid #FFF0F3}
.sidebar .widget h3 span{color:#FF6B81}
.sidebar .rec-list a{display:flex;gap:12px;padding:10px 0;border-bottom:1px solid #f5f6fa;transition:background .3s}
.sidebar .rec-list a:last-child{border-bottom:none}
.sidebar .rec-list a:hover{background:#FFF0F3;border-radius:8px;padding-left:6px}
.sidebar .rec-list .rec-thumb{width:120px;height:68px;border-radius:6px;overflow:hidden;flex-shrink:0}
.sidebar .rec-list .rec-thumb img{width:100%;height:100%;object-fit:cover}
.sidebar .rec-list .rec-info{flex:1}
.sidebar .rec-list .rec-info h4{font-size:13px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sidebar .rec-list .rec-info span{font-size:11px;color:#b2bec3;margin-top:4px;display:block}

/* === 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:repeat(2,1fr)}
  .page-layout{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .header-inner{height:56px}
  .main-nav{display:none;position:absolute;top:56px;left:0;right:0;background:#2D3436;flex-direction:column;padding:10px 0;box-shadow:0 10px 30px rgba(0,0,0,.3)}
  .main-nav.show{display:flex}
  .main-nav a{padding:12px 20px}
  .mobile-menu-btn{display:block}
  .hero-section{height:360px}
  .hero-content h1{font-size:26px}
  .hero-content p{font-size:14px}
  .video-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:15px}
  .stat-item .stat-num{font-size:24px}
  .expert-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:40px 0}
  .section-title h2{font-size:22px}
  .howto-steps{grid-template-columns:1fr}
  .hero-btns{flex-direction:column;gap:10px}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .logo-area .brand-name{font-size:18px}
}

/* === 情感话题与亲密教育 === */
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.topic-card{background:#fff;border-radius:12px;padding:28px;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:transform .3s;border-left:4px solid #FF6B81}
.topic-card:hover{transform:translateY(-4px)}
.topic-card h4{font-size:17px;font-weight:700;margin-bottom:8px;color:#2D3436}
.topic-card .topic-tag{display:inline-block;background:#FFF0F3;color:#E84393;padding:3px 12px;border-radius:12px;font-size:11px;font-weight:600;margin-bottom:10px}
.topic-card p{font-size:13px;color:#636e72;line-height:1.8}
.topic-card .topic-meta{margin-top:12px;font-size:12px;color:#b2bec3;display:flex;gap:15px}

/* === 视频标签云 === */
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:20px}
.tag-cloud a{display:inline-block;padding:6px 16px;border-radius:20px;font-size:13px;font-weight:500;background:#f0f0f0;color:#636e72;transition:all .3s}
.tag-cloud a:hover{background:linear-gradient(135deg,#FF6B81,#E84393);color:#fff}

/* === 作者信息卡 === */
.author-card{display:flex;align-items:center;gap:16px;background:#FFF0F3;border-radius:12px;padding:20px;margin:20px 0}
.author-card img{width:60px;height:60px;border-radius:50%;object-fit:cover;border:2px solid #FF6B81}
.author-card .author-info h4{font-size:15px;font-weight:700;margin-bottom:2px}
.author-card .author-info p{font-size:12px;color:#636e72}
.author-card .author-info .author-title{color:#FF6B81;font-size:12px;font-weight:600}

/* === 视频时效标记 === */
.video-timestamp{display:flex;gap:20px;font-size:12px;color:#b2bec3;margin-top:10px;padding-top:10px;border-top:1px solid #f5f6fa}
.video-timestamp span{display:flex;align-items:center;gap:4px}

/* === 法律页面 === */
.legal-content{max-width:800px;margin:0 auto;background:#fff;border-radius:16px;padding:40px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.legal-content h2{font-size:24px;font-weight:700;margin:30px 0 15px;color:#2D3436;padding-bottom:10px;border-bottom:2px solid #FFF0F3}
.legal-content h3{font-size:18px;font-weight:600;margin:20px 0 10px;color:#2D3436}
.legal-content p{font-size:14px;color:#636e72;line-height:2;margin-bottom:12px}
.legal-content ul{margin:10px 0 15px 20px}
.legal-content ul li{font-size:14px;color:#636e72;line-height:2;list-style:disc}

/* === 404页面 === */
.error-page{text-align:center;padding:80px 20px}
.error-page h1{font-size:120px;font-weight:800;color:#FF6B81;line-height:1}
.error-page h2{font-size:28px;font-weight:700;margin:20px 0 15px}
.error-page p{font-size:16px;color:#636e72;margin-bottom:30px}

/* === EEAT资质展示 === */
.credential-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:30px}
.credential-item{text-align:center;padding:20px;background:#fff;border-radius:12px;box-shadow:0 2px 10px rgba(0,0,0,.04)}
.credential-item .cred-icon{font-size:36px;margin-bottom:10px}
.credential-item h4{font-size:14px;font-weight:700;margin-bottom:4px}
.credential-item p{font-size:12px;color:#636e72}

/* === 响应式补充 === */
@media(max-width:768px){
  .topic-grid{grid-template-columns:1fr}
  .credential-grid{grid-template-columns:repeat(2,1fr)}
  .author-card{flex-direction:column;text-align:center}
}
@media(max-width:480px){
  .credential-grid{grid-template-columns:1fr}
}