/* ========================================
   母狗官网 - 原创样式表
   配色：珊瑚粉 #FF6B8A / 海洋蓝 #00BCD4 / 奶油黄 #FFF3CD / 深紫 #2D1B69
   ======================================== */
*{margin:0;padding:0;box-sizing:border-box}
:root{--coral:#FF6B8A;--ocean:#00BCD4;--cream:#FFF3CD;--deep:#2D1B69;--bg:#FAFBFF;--text:#333;--light:#f8f0ff;--card:#fff;--shadow:0 4px 20px rgba(45,27,105,.08);--radius:16px}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.8;overflow-x:hidden}
a{color:var(--coral);text-decoration:none;transition:color .3s}
a:hover{color:var(--deep)}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* 导航栏 */
.navbar{background:linear-gradient(135deg,var(--deep) 0%,#4a2d8a 100%);position:sticky;top:0;z-index:1000;box-shadow:0 2px 16px rgba(45,27,105,.2)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto;padding:8px 20px}
.nav-logo{display:flex;align-items:center;gap:10px}
.nav-logo img{width:40px;height:40px;border-radius:50%}
.logo-text{color:#fff;font-size:1.3rem;font-weight:700;letter-spacing:1px}
.nav-links{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.nav-links a{color:rgba(255,255,255,.9);padding:6px 14px;border-radius:20px;font-size:.9rem;transition:all .3s}
.nav-links a:hover,.nav-links a.active{background:var(--coral);color:#fff}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* 搜索框 */
.search-bar{background:rgba(45,27,105,.05);padding:12px 0;border-bottom:1px solid rgba(45,27,105,.06)}
.search-inner{max-width:600px;margin:0 auto;display:flex;gap:8px;padding:0 20px}
.search-inner input{flex:1;padding:10px 18px;border:2px solid var(--coral);border-radius:25px;font-size:.95rem;outline:none;transition:border-color .3s;background:#fff}
.search-inner input:focus{border-color:var(--ocean)}
.search-inner button{padding:10px 24px;background:linear-gradient(135deg,var(--coral),#ff8fa3);color:#fff;border:none;border-radius:25px;cursor:pointer;font-size:.95rem;transition:transform .2s}
.search-inner button:hover{transform:scale(1.05)}

/* Banner */
.banner{position:relative;overflow:hidden;border-radius:0 0 30px 30px}
.banner img{width:100%;height:420px;object-fit:cover}
.banner-overlay{position:absolute;inset:0;background:linear-gradient(to bottom,rgba(45,27,105,.5),rgba(255,107,138,.3));display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:20px}
.banner-overlay h1{color:#fff;font-size:2.6rem;text-shadow:2px 2px 8px rgba(0,0,0,.4);margin-bottom:12px}
.banner-overlay p{color:rgba(255,255,255,.95);font-size:1.15rem;max-width:700px;text-shadow:1px 1px 4px rgba(0,0,0,.3)}

/* 通用Section */
.section{padding:50px 0}
.section-alt{background:var(--light)}
.section-title{text-align:center;margin-bottom:36px}
.section-title h2{font-size:1.9rem;color:var(--deep);position:relative;display:inline-block;padding-bottom:12px}
.section-title h2::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60px;height:4px;background:linear-gradient(90deg,var(--coral),var(--ocean));border-radius:2px}
.section-title h2 span{color:var(--coral)}
.section-title p{color:#666;margin-top:10px;font-size:1rem}

/* 视频卡片网格 */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.video-card{background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 32px rgba(45,27,105,.15)}
.video-thumb{position:relative;overflow:hidden;aspect-ratio:16/9}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb img{transform:scale(1.08)}
.play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;background:rgba(45,27,105,.35)}
.video-card:hover .play-btn{opacity:1}
.play-btn span{width:56px;height:56px;background:var(--coral);border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 16px rgba(255,107,138,.4)}
.play-btn span::after{content:'';border-left:18px solid #fff;border-top:11px solid transparent;border-bottom:11px solid transparent;margin-left:4px}
.video-info{padding:14px 16px}
.video-info h3{font-size:1rem;color:var(--deep);margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:12px;color:#999;font-size:.8rem}
.video-tag{display:inline-block;background:var(--cream);color:var(--coral);padding:2px 10px;border-radius:10px;font-size:.75rem;margin-top:6px}

/* 专家卡片 */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:var(--card);border-radius:var(--radius);padding:28px 20px;text-align:center;box-shadow:var(--shadow);transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-card img{width:100px;height:100px;border-radius:50%;margin:0 auto 14px;object-fit:cover;border:3px solid var(--coral)}
.expert-card h4{color:var(--deep);font-size:1.05rem;margin-bottom:4px}
.expert-card .role{color:var(--coral);font-size:.85rem;margin-bottom:8px}
.expert-card p{color:#666;font-size:.85rem;line-height:1.6}
.expert-credentials{font-size:.8rem;color:#888;margin-top:6px}
.expert-btns{margin-top:12px;display:flex;gap:8px;justify-content:center}
.btn-sm{padding:6px 16px;border-radius:20px;font-size:.8rem;border:none;cursor:pointer;transition:all .3s}
.btn-coral{background:var(--coral);color:#fff}
.btn-coral:hover{background:var(--deep)}
.btn-outline{background:transparent;border:1px solid var(--ocean);color:var(--ocean)}
.btn-outline:hover{background:var(--ocean);color:#fff}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--card);border-radius:12px;margin-bottom:14px;box-shadow:var(--shadow);overflow:hidden}
.faq-q{padding:16px 20px;font-weight:600;color:var(--deep);cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .3s}
.faq-q:hover{background:var(--cream)}
.faq-q::after{content:'+';font-size:1.3rem;color:var(--coral);transition:transform .3s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:all .4s;color:#555;line-height:1.8}
.faq-item.open .faq-a{padding:0 20px 16px;max-height:500px}

/* 评论 */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.review-card{background:var(--card);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.review-avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--coral),var(--ocean));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.1rem}
.review-name{font-weight:600;color:var(--deep)}
.review-date{font-size:.8rem;color:#999}
.review-stars{color:#FFB800;font-size:.9rem;margin-bottom:6px}
.review-text{color:#555;font-size:.9rem;line-height:1.7}

/* 合作品牌 */
.brand-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center;padding:20px 0}
.brand-wall span{background:var(--card);padding:14px 28px;border-radius:12px;box-shadow:var(--shadow);color:var(--deep);font-weight:600;font-size:1rem}

/* How-To指南 */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;max-width:900px;margin:0 auto}
.howto-step{text-align:center;padding:20px}
.step-num{width:48px;height:48px;background:linear-gradient(135deg,var(--coral),var(--ocean));border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.2rem;margin:0 auto 12px}
.howto-step h4{color:var(--deep);margin-bottom:6px;font-size:.95rem}
.howto-step p{color:#666;font-size:.85rem}

/* 联系信息 */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.contact-box{background:var(--card);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.contact-box h3{color:var(--deep);margin-bottom:14px;font-size:1.15rem;border-left:4px solid var(--coral);padding-left:12px}
.contact-box p{color:#555;margin-bottom:8px;font-size:.95rem}
.qr-group{display:flex;gap:20px;margin-top:14px}
.qr-item{text-align:center}
.qr-item img{width:120px;height:120px;border-radius:10px}
.qr-item p{font-size:.8rem;color:#666;margin-top:6px}

/* 社交分享 */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-btn{padding:10px 22px;border-radius:25px;color:#fff;font-size:.9rem;cursor:pointer;border:none;transition:transform .2s}
.share-btn:hover{transform:scale(1.05)}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#161823}
.share-bilibili{background:#00A1D6}

/* 页脚 */
.footer{background:linear-gradient(135deg,var(--deep) 0%,#1a0f40 100%);color:rgba(255,255,255,.8);padding:40px 0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-bottom:30px}
.footer-col h4{color:#fff;margin-bottom:14px;font-size:1rem}
.footer-col a{display:block;color:rgba(255,255,255,.7);margin-bottom:8px;font-size:.9rem;transition:color .3s}
.footer-col a:hover{color:var(--coral)}
.footer-col p{font-size:.85rem;line-height:1.7;color:rgba(255,255,255,.65)}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.footer-logo img{width:36px;height:36px;border-radius:50%}
.footer-logo span{color:#fff;font-weight:700;font-size:1.1rem}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:18px;text-align:center;font-size:.8rem;color:rgba(255,255,255,.5)}
.footer-bottom a{color:rgba(255,255,255,.6)}

/* 面包屑 */
.breadcrumb{padding:14px 0;font-size:.85rem;color:#888}
.breadcrumb a{color:var(--coral)}
.breadcrumb span{margin:0 6px;color:#ccc}

/* 内页通用 */
.page-header{background:linear-gradient(135deg,var(--deep),#4a2d8a);padding:40px 0;text-align:center;border-radius:0 0 30px 30px}
.page-header h1{color:#fff;font-size:2rem;margin-bottom:8px}
.page-header p{color:rgba(255,255,255,.8);font-size:1rem}

/* AI区域特殊样式 */
.ai-section-img{border-radius:12px;margin-top:30px;overflow:hidden}
.ai-section-img img{width:100%;border-radius:12px}

/* 回到顶部 */
.back-to-top{position:fixed;bottom:30px;right:30px;width:48px;height:48px;background:var(--coral);color:#fff;border:none;border-radius:50%;font-size:1.3rem;cursor:pointer;box-shadow:0 4px 16px rgba(255,107,138,.3);opacity:0;visibility:hidden;transition:all .3s;z-index:999;display:flex;align-items:center;justify-content:center}
.back-to-top.visible{opacity:1;visibility:visible}
.back-to-top:hover{background:var(--deep);transform:translateY(-3px)}

/* MCP Widget */
.mcp-widget{background:var(--card);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin-top:20px;text-align:center}
.mcp-widget h4{color:var(--deep);margin-bottom:8px}
.mcp-widget p{color:#666;font-size:.85rem}

/* 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)}
}
@media(max-width:768px){
.nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:var(--deep);flex-direction:column;padding:16px;gap:4px}
.nav-links.show{display:flex}
.nav-toggle{display:block}
.banner img{height:260px}
.banner-overlay h1{font-size:1.6rem}
.banner-overlay p{font-size:.9rem}
.video-grid{grid-template-columns:repeat(2,1fr);gap:14px}
.expert-grid{grid-template-columns:1fr}
.review-grid{grid-template-columns:1fr}
.contact-grid{grid-template-columns:1fr}
.howto-steps{grid-template-columns:repeat(2,1fr)}
.section{padding:32px 0}
.section-title h2{font-size:1.4rem}
.footer-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
.video-grid{grid-template-columns:1fr}
.howto-steps{grid-template-columns:1fr}
.search-inner{flex-direction:column}
.search-inner button{width:100%}
}