/* ========================================
   大奶 - 原创样式表
   品牌色系：珊瑚粉 #FF6B8A / 暖橙 #FF9A56 / 深紫 #2D1B4E / 浅粉 #FFF0F3
   ======================================== */

/* CSS Reset & Base */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'PingFang SC','Microsoft YaHei','Hiragino Sans GB',Arial,sans-serif;color:#333;background:#FFF0F3;line-height:1.7;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:color .3s}
a:hover{color:#FF6B8A}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{background:linear-gradient(135deg,#2D1B4E 0%,#1a0e30 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:10px 20px;max-width:1200px;margin:0 auto}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{height:48px;width:auto}
.logo-text{font-size:1.4rem;font-weight:700;color:#fff;background:linear-gradient(135deg,#FF6B8A,#FF9A56);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.main-nav{display:flex;gap:4px}
.main-nav a{color:#ddd;padding:8px 12px;border-radius:20px;font-size:.88rem;transition:all .3s;white-space:nowrap}
.main-nav a:hover,.main-nav a.active{background:linear-gradient(135deg,#FF6B8A,#FF9A56);color:#fff}
.mobile-menu-btn{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* Breadcrumb */
.breadcrumb{padding:10px 0;font-size:.85rem;color:#888;background:#fff;border-bottom:1px solid #f0e0f0}
.breadcrumb a{color:#FF6B8A}
.breadcrumb span{margin:0 6px;color:#ccc}

/* Search Bar */
.search-bar{background:linear-gradient(135deg,#FF6B8A 0%,#FF9A56 100%);padding:12px 0}
.search-bar .container{display:flex;justify-content:center}
.search-form{display:flex;max-width:600px;width:100%;background:#fff;border-radius:30px;overflow:hidden;box-shadow:0 4px 15px rgba(255,107,138,.3)}
.search-form input{flex:1;border:none;padding:12px 24px;font-size:1rem;outline:none;background:transparent}
.search-form button{background:linear-gradient(135deg,#FF6B8A,#FF9A56);color:#fff;border:none;padding:12px 28px;cursor:pointer;font-size:1rem;transition:opacity .3s}
.search-form button:hover{opacity:.85}

/* Banner */
.hero-banner{position:relative;overflow:hidden;height:420px}
.hero-banner img{width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(to right,rgba(45,27,78,.85) 0%,rgba(45,27,78,.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:2.6rem;margin-bottom:12px;text-shadow:0 2px 10px rgba(0,0,0,.5)}
.hero-content h1 span{color:#FF9A56}
.hero-content p{font-size:1.15rem;max-width:500px;opacity:.9;line-height:1.8}
.hero-tags{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}
.hero-tags span{background:rgba(255,107,138,.25);border:1px solid rgba(255,107,138,.5);padding:5px 16px;border-radius:20px;font-size:.85rem;color:#FFD4DE}

/* Section Common */
.section{padding:50px 0}
.section-title{text-align:center;margin-bottom:35px}
.section-title h2{font-size:1.8rem;color:#2D1B4E;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:3px;background:linear-gradient(135deg,#FF6B8A,#FF9A56);border-radius:2px}
.section-title p{color:#888;margin-top:10px;font-size:.95rem}
.section-alt{background:#fff}

/* Video Grid */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 35px rgba(255,107,138,.2)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#eee}
.video-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.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(255,107,138,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all .3s}
.play-icon::after{content:'';border-style:solid;border-width:8px 0 8px 14px;border-color:transparent transparent transparent #fff;margin-left:3px}
.video-card:hover .play-icon{background:rgba(255,154,86,.9);transform:translate(-50%,-50%) scale(1.15)}
.video-info{padding:14px}
.video-info h3{font-size:.95rem;color:#2D1B4E;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.4}
.video-meta{display:flex;gap:12px;font-size:.78rem;color:#999}
.video-meta span,.video-meta time{display:flex;align-items:center;gap:3px}
.video-tag{display:inline-block;background:linear-gradient(135deg,#FF6B8A,#FF9A56);color:#fff;padding:2px 10px;border-radius:10px;font-size:.72rem;margin-bottom:6px}

/* Feature Cards */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:#fff;border-radius:16px;padding:30px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:all .3s;border:2px solid transparent}
.feature-card:hover{border-color:#FF6B8A;transform:translateY(-4px)}
.feature-icon{width:70px;height:70px;margin:0 auto 16px;background:linear-gradient(135deg,#FF6B8A,#FF9A56);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:2rem;color:#fff}
.feature-card h3{font-size:1.1rem;color:#2D1B4E;margin-bottom:8px}
.feature-card p{font-size:.88rem;color:#777;line-height:1.6}

/* Expert Section */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.expert-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,.06);text-align:center;transition:all .3s}
.expert-card:hover{transform:translateY(-5px);box-shadow:0 10px 30px rgba(255,107,138,.15)}
.expert-avatar{width:100%;height:200px;object-fit:cover}
.expert-info{padding:16px}
.expert-info h4{font-size:1rem;color:#2D1B4E;margin-bottom:4px}
.expert-info .role{color:#FF6B8A;font-size:.82rem;margin-bottom:8px}
.expert-info p{font-size:.82rem;color:#888;line-height:1.5}
.expert-credentials{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-top:10px}
.credential-tag{background:#FFF0F3;color:#FF6B8A;padding:3px 10px;border-radius:12px;font-size:.72rem;border:1px solid #FFD4DE}
.expert-btns{display:flex;gap:8px;justify-content:center;padding:0 16px 16px}
.expert-btns a{flex:1;padding:7px 0;border-radius:20px;font-size:.8rem;text-align:center;transition:all .3s}
.btn-contact{background:linear-gradient(135deg,#FF6B8A,#FF9A56);color:#fff}
.btn-works{border:1px solid #FF6B8A;color:#FF6B8A}
.btn-works:hover{background:#FF6B8A;color:#fff}

/* Gallery Showcase */
.gallery-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.gallery-item{border-radius:10px;overflow:hidden;position:relative;cursor:pointer}
.gallery-item img{width:100%;height:200px;object-fit:cover;transition:transform .5s}
.gallery-item:hover img{transform:scale(1.1)}
.gallery-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(45,27,78,.7) 0%,transparent 50%);opacity:0;transition:opacity .3s;display:flex;align-items:flex-end;padding:12px}
.gallery-item:hover .gallery-overlay{opacity:1}
.gallery-overlay span{color:#fff;font-size:.85rem}

/* FAQ Section */
.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-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:#2D1B4E;transition:background .3s}
.faq-question:hover{background:#FFF0F3}
.faq-question::after{content:'+';font-size:1.4rem;color:#FF6B8A;transition:transform .3s}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 24px}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 18px}
.faq-answer p{color:#666;font-size:.92rem;line-height:1.7}

/* Reviews */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.review-card{background:#fff;border-radius:14px;padding:24px;box-shadow:0 4px 15px rgba(0,0,0,.05);position:relative}
.review-card::before{content:'\201C';position:absolute;top:10px;left:16px;font-size:3rem;color:#FFD4DE;font-family:Georgia,serif;line-height:1}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:12px;padding-left:30px}
.review-avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#FF6B8A,#FF9A56);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.1rem}
.review-name{font-weight:600;color:#2D1B4E;font-size:.95rem}
.review-date{font-size:.78rem;color:#aaa}
.review-stars{color:#FF9A56;font-size:.85rem;letter-spacing:2px}
.review-text{color:#666;font-size:.9rem;line-height:1.7;padding-left:30px}

/* Partner Logos */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-wall .partner-item{background:#fff;padding:16px 28px;border-radius:10px;box-shadow:0 2px 10px rgba(0,0,0,.05);font-size:1rem;font-weight:600;color:#2D1B4E;transition:all .3s}
.partner-wall .partner-item:hover{box-shadow:0 6px 20px rgba(255,107,138,.15);transform:translateY(-3px)}

/* How-To Guide */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;max-width:900px;margin:0 auto}
.howto-step{text-align:center;padding:24px 16px}
.step-num{width:50px;height:50px;margin:0 auto 14px;background:linear-gradient(135deg,#FF6B8A,#FF9A56);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.3rem;font-weight:700}
.howto-step h4{color:#2D1B4E;margin-bottom:6px;font-size:.95rem}
.howto-step p{color:#888;font-size:.83rem;line-height:1.5}

/* Contact Section */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.contact-info{background:#fff;border-radius:16px;padding:30px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.contact-info h3{color:#2D1B4E;margin-bottom:16px;font-size:1.2rem}
.contact-item{display:flex;align-items:flex-start;gap:12px;margin-bottom:14px;font-size:.92rem;color:#555}
.contact-item strong{color:#2D1B4E;min-width:100px}
.contact-qr{display:flex;gap:20px;justify-content:center}
.contact-qr .qr-item{text-align:center}
.contact-qr .qr-item img{width:140px;height:140px;border-radius:10px;margin-bottom:8px}
.contact-qr .qr-item span{font-size:.82rem;color:#888}

/* Share Buttons */
.share-bar{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:20px;font-size:.85rem;color:#fff;transition:all .3s;cursor:pointer}
.share-btn:hover{transform:translateY(-2px);opacity:.9}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#111}
.share-bilibili{background:#00A1D6}

/* Footer */
.site-footer{background:#2D1B4E;color:#ccc;padding:40px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-brand .logo-wrap{margin-bottom:12px}
.footer-brand p{font-size:.85rem;line-height:1.6;color:#aaa}
.footer-col h4{color:#fff;margin-bottom:14px;font-size:1rem}
.footer-col a{display:block;color:#aaa;font-size:.85rem;margin-bottom:8px;transition:color .3s}
.footer-col a:hover{color:#FF6B8A}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding:20px 0;font-size:.82rem;color:#888;flex-wrap:wrap;gap:10px}
.footer-bottom a{color:#FF6B8A}

/* Inner Page Video Player */
.video-player-wrap{background:#000;border-radius:12px;overflow:hidden;margin-bottom:24px;max-width:900px;margin-left:auto;margin-right:auto}
.video-player-wrap video{width:100%;display:block;max-height:500px}
.video-detail{max-width:900px;margin:0 auto}
.video-detail h1{font-size:1.6rem;color:#2D1B4E;margin-bottom:12px}
.video-detail .meta-bar{display:flex;gap:20px;color:#888;font-size:.88rem;margin-bottom:20px;flex-wrap:wrap}
.video-detail .desc{color:#555;line-height:1.8;font-size:.95rem;background:#fff;padding:20px;border-radius:12px}
.tag-list{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.tag-list span{background:#FFF0F3;color:#FF6B8A;padding:4px 14px;border-radius:15px;font-size:.82rem}

/* Related Videos */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px}

/* About Page */
.about-hero{background:linear-gradient(135deg,#2D1B4E,#1a0e30);color:#fff;padding:60px 0;text-align:center}
.about-hero h1{font-size:2.2rem;margin-bottom:12px}
.about-hero p{font-size:1.1rem;opacity:.85;max-width:600px;margin:0 auto}
.about-content{max-width:800px;margin:0 auto}
.about-content h2{color:#2D1B4E;font-size:1.5rem;margin:30px 0 15px;padding-bottom:8px;border-bottom:2px solid #FF6B8A}
.about-content p{color:#555;line-height:1.8;margin-bottom:15px;font-size:.95rem}
.timeline{position:relative;padding-left:30px}
.timeline::before{content:'';position:absolute;left:8px;top:0;bottom:0;width:2px;background:linear-gradient(to bottom,#FF6B8A,#FF9A56)}
.timeline-item{position:relative;margin-bottom:24px;padding-left:20px}
.timeline-item::before{content:'';position:absolute;left:-26px;top:6px;width:12px;height:12px;border-radius:50%;background:#FF6B8A;border:2px solid #fff;box-shadow:0 0 0 2px #FF6B8A}
.timeline-item h4{color:#2D1B4E;font-size:1rem;margin-bottom:4px}
.timeline-item p{color:#777;font-size:.88rem}

/* Responsive */
@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)}
    .gallery-grid{grid-template-columns:repeat(3,1fr)}
    .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
    .header-inner{flex-wrap:wrap}
    .main-nav{display:none;width:100%;flex-direction:column;padding-top:10px}
    .main-nav.active{display:flex}
    .mobile-menu-btn{display:block}
    .hero-banner{height:280px}
    .hero-content h1{font-size:1.6rem}
    .hero-content p{font-size:.9rem}
    .video-grid{grid-template-columns:repeat(2,1fr)}
    .feature-grid{grid-template-columns:1fr}
    .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)}
    .gallery-grid{grid-template-columns:repeat(2,1fr)}
    .footer-grid{grid-template-columns:1fr}
    .related-grid{grid-template-columns:repeat(2,1fr)}
    .section{padding:30px 0}
}
@media(max-width:480px){
    .video-grid{grid-template-columns:1fr}
    .howto-steps{grid-template-columns:1fr}
    .gallery-grid{grid-template-columns:1fr}
    .related-grid{grid-template-columns:1fr}
    html{font-size:14px}
}

/* Image Placeholder */

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

/* MCP Frontend Placeholder */
.mcp-widget{background:#f8f0f8;border:1px dashed #ddd;border-radius:10px;padding:20px;text-align:center;color:#aaa;font-size:.85rem;margin:20px 0}