/* ========================================
   国产vlog 全站样式表
   品牌色: #ff6b35(活力橙) #00d4aa(薄荷绿)
   背景色: #0d0d1a(暗夜蓝黑) #1a0a2e(深紫黑)
   卡片色: #1e1e3a(深蓝紫)
   文字色: #e8e8f0(浅灰白)
   ======================================== */

/* 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','Helvetica Neue',Arial,sans-serif;background:#0d0d1a;color:#e8e8f0;line-height:1.7;overflow-x:hidden}
a{color:#00d4aa;text-decoration:none;transition:color .3s}
a:hover{color:#ff6b35}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Header / Navigation */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(13,13,26,.95);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,107,53,.2);transition:all .3s}
.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:42px;width:auto}
.logo-wrap span{font-size:1.3rem;font-weight:700;color:#ff6b35;letter-spacing:1px}
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{padding:12px 16px;font-size:.95rem;color:#e8e8f0;position:relative;transition:all .3s}
.main-nav a::after{content:'';position:absolute;bottom:0;left:50%;width:0;height:2px;background:#ff6b35;transition:all .3s;transform:translateX(-50%)}
.main-nav a:hover,.main-nav a.active{color:#ff6b35}
.main-nav a:hover::after,.main-nav a.active::after{width:60%}
.mobile-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:5px}
.mobile-toggle span{width:25px;height:2px;background:#e8e8f0;transition:all .3s}

/* Search Box */
.search-bar{background:rgba(30,30,58,.8);padding:15px 0;border-bottom:1px solid rgba(0,212,170,.1)}
.search-bar .container{display:flex;justify-content:center}
.search-form{display:flex;max-width:600px;width:100%}
.search-form input{flex:1;padding:10px 18px;border:2px solid rgba(255,107,53,.3);border-right:none;border-radius:25px 0 0 25px;background:rgba(13,13,26,.8);color:#e8e8f0;font-size:.95rem;outline:none;transition:border-color .3s}
.search-form input:focus{border-color:#ff6b35}
.search-form input::placeholder{color:rgba(232,232,240,.4)}
.search-form button{padding:10px 25px;background:linear-gradient(135deg,#ff6b35,#ff8c5a);border:none;border-radius:0 25px 25px 0;color:#fff;font-size:.95rem;cursor:pointer;transition:all .3s}
.search-form button:hover{background:linear-gradient(135deg,#ff8c5a,#ff6b35)}

/* Banner / Hero */
.hero-banner{position:relative;min-height:520px;display:flex;align-items:center;justify-content:center;overflow:hidden;margin-top:65px}
.hero-banner .bg-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:brightness(.55)}
.hero-content{position:relative;z-index:2;text-align:center;padding:60px 20px}
.hero-content h1{font-size:2.8rem;font-weight:800;margin-bottom:18px;background:linear-gradient(135deg,#ff6b35,#00d4aa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-content p{font-size:1.15rem;max-width:700px;margin:0 auto 25px;color:rgba(232,232,240,.9);line-height:1.8}
.hero-content .hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:15px}
.hero-content .hero-tags span{padding:6px 16px;border-radius:20px;font-size:.85rem;background:rgba(255,107,53,.15);border:1px solid rgba(255,107,53,.3);color:#ff6b35}

/* Section Common */
.section{padding:60px 0}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:2rem;font-weight:700;color:#e8e8f0;margin-bottom:10px}
.section-title h2 .highlight{color:#ff6b35}
.section-title p{color:rgba(232,232,240,.6);font-size:1rem}
.section-alt{background:rgba(26,10,46,.4)}

/* Video Card Grid */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:25px}
.video-card{background:#1e1e3a;border-radius:12px;overflow:hidden;transition:transform .3s,box-shadow .3s;cursor:pointer;position:relative}
.video-card:hover{transform:translateY(-5px);box-shadow:0 10px 30px rgba(255,107,53,.15)}
.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(1.05)}
.video-card .play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(0);width:60px;height:60px;background:rgba(255,107,53,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:transform .3s;z-index:2}
.video-card:hover .play-btn{transform:translate(-50%,-50%) scale(1)}
.video-card .play-btn::after{content:'';width:0;height:0;border-left:22px solid #fff;border-top:13px solid transparent;border-bottom:13px solid transparent;margin-left:4px}
.video-card .duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.8);color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem;z-index:3;letter-spacing:.5px}
.video-card .card-info{padding:15px}
.video-card .card-info h3{font-size:1rem;font-weight:600;margin-bottom:8px;color:#e8e8f0;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:rgba(232,232,240,.5)}
.video-card .card-meta .views{color:#00d4aa}
.video-card .tag{position:absolute;top:10px;left:10px;padding:3px 10px;border-radius:4px;font-size:.75rem;background:rgba(255,107,53,.85);color:#fff;z-index:3}

/* Module Cards */
.module-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:25px}
.module-card{background:linear-gradient(145deg,#1e1e3a,#1a0a2e);border-radius:12px;padding:30px 25px;text-align:center;border:1px solid rgba(255,107,53,.1);transition:all .3s}
.module-card:hover{border-color:rgba(255,107,53,.4);transform:translateY(-3px)}
.module-card .icon{width:60px;height:60px;margin:0 auto 18px;background:linear-gradient(135deg,rgba(255,107,53,.2),rgba(0,212,170,.2));border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.8rem}
.module-card h3{font-size:1.1rem;margin-bottom:10px;color:#ff6b35}
.module-card p{font-size:.9rem;color:rgba(232,232,240,.65);line-height:1.6}

/* Expert Section */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:25px}
.expert-card{background:#1e1e3a;border-radius:12px;overflow:hidden;text-align:center;border:1px solid rgba(0,212,170,.1);transition:all .3s}
.expert-card:hover{border-color:rgba(0,212,170,.4);transform:translateY(-3px)}
.expert-card .avatar{width:120px;height:120px;border-radius:50%;margin:25px auto 15px;overflow:hidden;border:3px solid rgba(255,107,53,.4)}
.expert-card .avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h3{font-size:1.05rem;color:#ff6b35;margin-bottom:5px}
.expert-card .role{font-size:.85rem;color:#00d4aa;margin-bottom:10px}
.expert-card .bio{padding:0 20px 20px;font-size:.85rem;color:rgba(232,232,240,.6);line-height:1.6}
.expert-card .expert-links{padding:0 20px 20px;display:flex;justify-content:center;gap:10px}
.expert-card .expert-links a{padding:6px 14px;border-radius:20px;font-size:.8rem;border:1px solid rgba(255,107,53,.3);color:#ff6b35;transition:all .3s}
.expert-card .expert-links a:hover{background:rgba(255,107,53,.15)}

/* Reviews */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:25px}
.review-card{background:#1e1e3a;border-radius:12px;padding:25px;border:1px solid rgba(0,212,170,.1)}
.review-card .stars{color:#ff6b35;font-size:1rem;margin-bottom:10px;letter-spacing:2px}
.review-card .review-text{font-size:.9rem;color:rgba(232,232,240,.75);line-height:1.7;margin-bottom:15px;font-style:italic}
.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,#ff6b35,#00d4aa);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.9rem}
.review-card .reviewer-info .name{font-size:.9rem;font-weight:600;color:#e8e8f0}
.review-card .reviewer-info .date{font-size:.75rem;color:rgba(232,232,240,.4)}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#1e1e3a;border-radius:10px;margin-bottom:12px;overflow:hidden;border:1px solid rgba(255,107,53,.1)}
.faq-item .faq-q{padding:18px 25px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:#e8e8f0;transition:all .3s}
.faq-item .faq-q:hover{color:#ff6b35}
.faq-item .faq-q .arrow{transition:transform .3s;color:#ff6b35;font-size:1.2rem}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-item .faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 25px}
.faq-item.open .faq-a{max-height:500px;padding:0 25px 18px}
.faq-item .faq-a p{font-size:.9rem;color:rgba(232,232,240,.7);line-height:1.7}

/* Contact Section */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:25px}
.contact-card{background:#1e1e3a;border-radius:12px;padding:25px;text-align:center;border:1px solid rgba(255,107,53,.1)}
.contact-card h3{font-size:1.1rem;color:#ff6b35;margin-bottom:15px}
.contact-card p{font-size:.9rem;color:rgba(232,232,240,.7);margin-bottom:8px;line-height:1.6}
.contact-card .qr-img{width:160px;height:160px;margin:10px auto;border-radius:8px;overflow:hidden}
.contact-card .qr-img img{width:100%;height:100%;object-fit:cover}

/* Community Grid */
.community-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:20px}
.community-item{background:linear-gradient(145deg,#1e1e3a,#1a0a2e);border-radius:10px;padding:20px;text-align:center;border:1px solid rgba(0,212,170,.1);transition:all .3s}
.community-item:hover{border-color:#00d4aa;transform:translateY(-3px)}
.community-item .emoji{font-size:2.5rem;margin-bottom:10px}
.community-item h4{font-size:.95rem;color:#00d4aa;margin-bottom:5px}
.community-item p{font-size:.8rem;color:rgba(232,232,240,.5)}

/* Share Buttons */
.share-bar{display:flex;justify-content:center;gap:15px;padding:20px 0}
.share-btn{padding:8px 20px;border-radius:20px;font-size:.85rem;border:1px solid rgba(255,107,53,.3);color:#e8e8f0;cursor:pointer;transition:all .3s;background:transparent}
.share-btn:hover{background:rgba(255,107,53,.15);border-color:#ff6b35;color:#ff6b35}

/* How-To Guide */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px;margin-top:20px}
.howto-step{background:#1e1e3a;border-radius:12px;padding:25px;text-align:center;position:relative;border:1px solid rgba(0,212,170,.1)}
.howto-step .step-num{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#ff6b35,#00d4aa);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;margin:0 auto 15px;font-size:1.1rem}
.howto-step h4{color:#ff6b35;margin-bottom:8px;font-size:1rem}
.howto-step p{font-size:.85rem;color:rgba(232,232,240,.6);line-height:1.6}

/* Footer */
.site-footer{background:#0a0a15;border-top:1px solid rgba(255,107,53,.15);padding:40px 0 20px}
.footer-inner{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;max-width:1200px;margin:0 auto;padding:0 20px}
.footer-col h4{font-size:1rem;color:#ff6b35;margin-bottom:15px;font-weight:600}
.footer-col p,.footer-col a{font-size:.85rem;color:rgba(232,232,240,.6);line-height:1.8;display:block}
.footer-col a:hover{color:#00d4aa}
.footer-col .footer-logo{height:36px;margin-bottom:10px}
.footer-bottom{text-align:center;padding:20px;border-top:1px solid rgba(255,107,53,.1);margin-top:30px;font-size:.8rem;color:rgba(232,232,240,.4)}
.footer-bottom a{color:rgba(232,232,240,.5)}
.footer-bottom a:hover{color:#00d4aa}
.footer-bottom .update-time{color:#00d4aa}
.footer-qr{display:flex;gap:15px;margin-top:10px}
.footer-qr img{width:100px;height:100px;border-radius:6px}

/* Breadcrumb */
.breadcrumb{padding:15px 0;font-size:.85rem;color:rgba(232,232,240,.5)}
.breadcrumb a{color:#00d4aa}
.breadcrumb span{margin:0 8px;color:rgba(232,232,240,.3)}

/* AI Section */
.ai-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:25px}
.ai-card{background:linear-gradient(145deg,rgba(30,30,58,.9),rgba(26,10,46,.9));border-radius:12px;padding:30px;border:1px solid rgba(0,212,170,.15);position:relative;overflow:hidden}
.ai-card::before{content:'';position:absolute;top:-50%;right:-50%;width:100%;height:100%;background:radial-gradient(circle,rgba(0,212,170,.05) 0%,transparent 70%);pointer-events:none}
.ai-card h3{font-size:1.1rem;color:#00d4aa;margin-bottom:12px}
.ai-card p{font-size:.9rem;color:rgba(232,232,240,.65);line-height:1.7}

/* Partner Logos */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:20px;padding:20px 0}
.partner-logo{width:120px;height:60px;background:#1e1e3a;border-radius:8px;display:flex;align-items:center;justify-content:center;border:1px solid rgba(255,107,53,.1);transition:all .3s}
.partner-logo:hover{border-color:#ff6b35}

/* Buttons */
.btn{display:inline-block;padding:10px 28px;border-radius:25px;font-size:.95rem;font-weight:600;transition:all .3s;cursor:pointer;border:none}
.btn-primary{background:linear-gradient(135deg,#ff6b35,#ff8c5a);color:#fff}
.btn-primary:hover{background:linear-gradient(135deg,#ff8c5a,#ff6b35);transform:translateY(-2px)}
.btn-outline{border:2px solid #00d4aa;color:#00d4aa;background:transparent}
.btn-outline:hover{background:rgba(0,212,170,.1)}

/* Inner Page Content */
.page-content{padding:30px 0 60px}
.page-content h2{font-size:1.6rem;color:#ff6b35;margin-bottom:15px}
.page-content h3{font-size:1.2rem;color:#00d4aa;margin:20px 0 10px}
.page-content p{font-size:.95rem;color:rgba(232,232,240,.75);line-height:1.8;margin-bottom:15px}
.page-content ul{padding-left:20px;margin-bottom:15px}
.page-content ul li{font-size:.9rem;color:rgba(232,232,240,.7);line-height:1.8;margin-bottom:5px;list-style:disc}

/* Responsive */
@media(max-width:768px){
    .header-inner{padding:8px 15px}
    .main-nav{position:fixed;top:65px;left:0;width:100%;background:rgba(13,13,26,.98);flex-direction:column;padding:20px 0;transform:translateY(-120%);transition:transform .3s;border-bottom:1px solid rgba(255,107,53,.2)}
    .main-nav.show{transform:translateY(0)}
    .main-nav a{padding:12px 25px;width:100%;text-align:center}
    .mobile-toggle{display:flex}
    .hero-content h1{font-size:1.8rem}
    .hero-content p{font-size:1rem}
    .hero-banner{min-height:400px}
    .section{padding:40px 0}
    .section-title h2{font-size:1.5rem}
    .video-grid,.module-grid,.expert-grid,.review-grid,.contact-grid{grid-template-columns:1fr}
    .ai-features{grid-template-columns:1fr}
    .footer-inner{grid-template-columns:1fr}
    .community-grid{grid-template-columns:repeat(2,1fr)}
    .howto-steps{grid-template-columns:1fr}
    .share-bar{flex-wrap:wrap}
}
@media(max-width:480px){
    .hero-content h1{font-size:1.5rem}
    .search-form{flex-direction:column;gap:8px}
    .search-form input{border-radius:25px;border-right:2px solid rgba(255,107,53,.3)}
    .search-form button{border-radius:25px}
    .community-grid{grid-template-columns:1fr}
}

/* Lazy Load Placeholder */
.lazy{opacity:0;transition:opacity .5s}
.lazy.loaded{opacity:1}

/* Scrollbar */
::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-track{background:#0d0d1a}
::-webkit-scrollbar-thumb{background:rgba(255,107,53,.3);border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:rgba(255,107,53,.5)}

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