/* ============================================
   茄子视频 - 原创CSS样式表
   品牌配色：深碳黑 #0d1117 / 赛道红 #e63946 / 钛金灰 #8d99ae / 冰蓝 #4cc9f0 / 纯白 #f8f9fa
   ============================================ */

/* CSS Reset & Base */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","WenQuanYi Micro Hei",sans-serif;color:#e0e0e0;background:#0d1117;line-height:1.7;overflow-x:hidden}
a{color:#4cc9f0;text-decoration:none;transition:color .25s ease}
a:hover{color:#e63946}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3;color:#f8f9fa}
.container{max-width:1240px;margin:0 auto;padding:0 24px}

/* Header */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(13,17,23,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(141,153,174,.15)}
.header-inner{display:flex;align-items:center;justify-content:space-between;max-width:1240px;margin:0 auto;padding:0 24px;height:68px}
.logo-link{display:flex;align-items:center}
.logo-img{height:42px;width:auto}
.main-nav ul{display:flex;gap:8px}
.main-nav a{display:block;padding:8px 16px;font-size:.95rem;color:#8d99ae;border-radius:6px;transition:all .25s ease}
.main-nav a:hover,.main-nav a.active{color:#f8f9fa;background:rgba(230,57,70,.12)}
.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.menu-toggle span{display:block;width:24px;height:2px;background:#8d99ae;border-radius:2px;transition:all .3s ease}

/* Search Bar */
.search-bar{background:rgba(13,17,23,.6);border-bottom:1px solid rgba(141,153,174,.1);padding:10px 0}
.search-inner{max-width:1240px;margin:0 auto;padding:0 24px}
#searchForm{display:flex;gap:0;max-width:600px;margin:0 auto}
#searchInput{flex:1;padding:10px 18px;background:#161b22;border:1px solid rgba(141,153,174,.2);border-right:none;border-radius:8px 0 0 8px;color:#e0e0e0;font-size:.95rem;outline:none;transition:border-color .25s ease}
#searchInput:focus{border-color:#4cc9f0}
#searchBtn{padding:10px 24px;background:#e63946;color:#fff;border:none;border-radius:0 8px 8px 0;font-size:.95rem;cursor:pointer;transition:background .25s ease}
#searchBtn:hover{background:#c1121f}

/* Hero Section */
.hero-section{position:relative;min-height:600px;display:flex;align-items:center;justify-content:center;margin-top:110px;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;background-repeat:no-repeat}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(13,17,23,.88) 0%,rgba(13,17,23,.6) 50%,rgba(230,57,70,.15) 100%)}
.hero-content{position:relative;z-index:2;text-align:center;padding:60px 24px;max-width:900px}
.hero-content h1{font-size:2.6rem;margin-bottom:20px;letter-spacing:1px}
.hero-content h1 span{color:#e63946;font-size:3rem}
.hero-subtitle{font-size:1.1rem;color:#8d99ae;margin-bottom:32px;line-height:1.8}
.hero-btns{display:flex;gap:16px;justify-content:center;margin-bottom:40px;flex-wrap:wrap}
.btn-primary{display:inline-block;padding:14px 36px;background:linear-gradient(135deg,#e63946,#c1121f);color:#fff;border-radius:8px;font-size:1rem;font-weight:600;transition:transform .25s ease,box-shadow .25s ease}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(230,57,70,.35);color:#fff}
.btn-secondary{display:inline-block;padding:14px 36px;background:transparent;color:#4cc9f0;border:2px solid #4cc9f0;border-radius:8px;font-size:1rem;font-weight:600;transition:all .25s ease}
.btn-secondary:hover{background:#4cc9f0;color:#0d1117}
.hero-stats{display:flex;gap:48px;justify-content:center;flex-wrap:wrap}
.stat-item{text-align:center}
.stat-item strong{display:block;font-size:1.8rem;color:#4cc9f0}
.stat-item span{font-size:.85rem;color:#8d99ae}

/* Section Common */
.section-header{text-align:center;margin-bottom:48px;padding-top:72px}
.section-header h2{font-size:1.9rem;margin-bottom:14px;position:relative;display:inline-block}
.section-header h2::after{content:'';display:block;width:60px;height:3px;background:linear-gradient(90deg,#e63946,#4cc9f0);margin:12px auto 0;border-radius:2px}
.section-header p{color:#8d99ae;font-size:1rem;max-width:700px;margin:0 auto;line-height:1.7}

/* Video Grid */
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.video-card{background:#161b22;border-radius:12px;overflow:hidden;border:1px solid rgba(141,153,174,.1);transition:transform .3s ease,box-shadow .3s ease}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 36px rgba(0,0,0,.4)}
.video-thumb{position:relative;overflow:hidden;aspect-ratio:16/9;background:#0d1117}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.video-card:hover .video-thumb img{transform:scale(1.05)}
.play-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.35);opacity:0;transition:opacity .3s ease}
.video-card:hover .play-overlay{opacity:1}
.play-btn{width:56px;height:56px;background:rgba(230,57,70,.9);border-radius:50%;position:relative}
.play-btn::after{content:'';position:absolute;left:22px;top:16px;border-style:solid;border-width:12px 0 12px 20px;border-color:transparent transparent transparent #fff}
.video-duration{position:absolute;bottom:10px;right:10px;background:rgba(0,0,0,.75);color:#fff;padding:3px 8px;border-radius:4px;font-size:.8rem}
.video-tag{position:absolute;top:10px;left:10px;background:rgba(230,57,70,.85);color:#fff;padding:4px 10px;border-radius:4px;font-size:.78rem}
.video-info{padding:18px}
.video-info h3{font-size:1rem;margin-bottom:8px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:16px;font-size:.82rem;color:#8d99ae;margin-bottom:8px}
.video-desc{font-size:.85rem;color:#6c757d;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* Entertainment Grid */
.section-entertainment{background:#0a0e14}
.ent-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.ent-card{background:linear-gradient(145deg,#161b22,#1a2030);border-radius:12px;padding:32px 24px;text-align:center;border:1px solid rgba(141,153,174,.08);transition:all .3s ease}
.ent-card:hover{border-color:rgba(230,57,70,.3);transform:translateY(-4px)}
.ent-icon{font-size:2.8rem;margin-bottom:16px}
.ent-card h3{font-size:1.1rem;margin-bottom:12px}
.ent-card p{font-size:.88rem;color:#8d99ae;line-height:1.6;margin-bottom:16px}
.ent-count{display:inline-block;padding:4px 14px;background:rgba(76,201,240,.1);color:#4cc9f0;border-radius:20px;font-size:.82rem}

/* AI Section */
.section-ai{background:#0d1117}
.ai-grid{display:flex;flex-direction:column;gap:32px}
.ai-card{display:grid;grid-template-columns:1fr 1fr;gap:36px;background:#161b22;border-radius:16px;overflow:hidden;border:1px solid rgba(76,201,240,.12)}
.ai-img{overflow:hidden;aspect-ratio:16/9}
.ai-img img{width:100%;height:100%;object-fit:cover}
.ai-content{padding:36px 32px 36px 0;display:flex;flex-direction:column;justify-content:center}
.ai-content h3{font-size:1.4rem;margin-bottom:16px;color:#4cc9f0}
.ai-content p{font-size:.95rem;color:#8d99ae;line-height:1.8;margin-bottom:20px}
.ai-features{display:flex;flex-direction:column;gap:10px}
.ai-features li{padding-left:24px;position:relative;font-size:.9rem;color:#e0e0e0}
.ai-features li::before{content:'';position:absolute;left:0;top:8px;width:12px;height:12px;border-radius:50%;background:linear-gradient(135deg,#e63946,#4cc9f0)}
.ai-cards-row{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.ai-mini-card{background:#161b22;border-radius:12px;padding:28px;border:1px solid rgba(141,153,174,.1)}
.ai-mini-card h4{font-size:1.1rem;margin-bottom:12px;color:#e63946}
.ai-mini-card p{font-size:.9rem;color:#8d99ae;line-height:1.7}

/* Community Grid */
.section-community{background:#0a0e14}
.community-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.comm-card{background:#161b22;border-radius:12px;padding:28px;border:1px solid rgba(141,153,174,.08);transition:all .3s ease}
.comm-card:hover{border-color:rgba(230,57,70,.25);transform:translateY(-4px)}
.comm-icon{font-size:2.4rem;margin-bottom:14px}
.comm-card h3{font-size:1.05rem;margin-bottom:10px}
.comm-card p{font-size:.88rem;color:#8d99ae;line-height:1.6;margin-bottom:16px}
.comm-stats{display:flex;gap:16px;font-size:.82rem;color:#4cc9f0}

/* Expert Grid */
.section-experts{background:#0d1117}
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:#161b22;border-radius:12px;padding:28px;text-align:center;border:1px solid rgba(141,153,174,.08);transition:all .3s ease}
.expert-card:hover{border-color:rgba(230,57,70,.25);transform:translateY(-4px)}
.expert-avatar{width:120px;height:120px;border-radius:50%;object-fit:cover;margin:0 auto 16px;border:3px solid rgba(230,57,70,.4)}
.expert-card h3{font-size:1.15rem;margin-bottom:4px}
.expert-card h4{font-size:.82rem;color:#e63946;margin-bottom:12px;font-weight:500}
.expert-bio{font-size:.85rem;color:#8d99ae;line-height:1.6;margin-bottom:16px}
.expert-tags{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:18px}
.expert-tags span{padding:3px 10px;background:rgba(76,201,240,.1);color:#4cc9f0;border-radius:16px;font-size:.78rem}
.expert-btns{display:flex;gap:10px;justify-content:center}
.btn-expert{padding:8px 18px;background:#e63946;color:#fff;border-radius:6px;font-size:.85rem;transition:background .25s ease}
.btn-expert:hover{background:#c1121f;color:#fff}
.btn-expert-alt{padding:8px 18px;background:transparent;color:#4cc9f0;border:1px solid #4cc9f0;border-radius:6px;font-size:.85rem;transition:all .25s ease}
.btn-expert-alt:hover{background:#4cc9f0;color:#0d1117}

/* Partners */
.section-partners{background:#0a0e14}
.partner-wall{display:flex;gap:20px;justify-content:center;flex-wrap:wrap}
.partner-item{background:#161b22;border:1px solid rgba(141,153,174,.1);border-radius:10px;padding:20px 36px;display:flex;align-items:center;justify-content:center;transition:all .3s ease}
.partner-item:hover{border-color:rgba(230,57,70,.3)}
.partner-item span{font-size:1.2rem;font-weight:700;color:#8d99ae;letter-spacing:2px}

/* How-To Steps */
.section-howto{background:#0d1117}
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step-card{background:#161b22;border-radius:12px;padding:32px 24px;text-align:center;border:1px solid rgba(141,153,174,.08);position:relative}
.step-num{font-size:2.4rem;font-weight:800;color:rgba(230,57,70,.2);margin-bottom:12px}
.step-card h3{font-size:1.05rem;margin-bottom:12px}
.step-card p{font-size:.88rem;color:#8d99ae;line-height:1.6}

/* FAQ */
.section-faq{background:#0a0e14}
.faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:#161b22;border-radius:10px;border:1px solid rgba(141,153,174,.1);overflow:hidden}
.faq-question{padding:18px 24px;cursor:pointer;font-size:1rem;position:relative;padding-right:48px;transition:color .25s ease}
.faq-question::after{content:'+';position:absolute;right:24px;top:50%;transform:translateY(-50%);font-size:1.4rem;color:#e63946;transition:transform .3s ease}
.faq-item.open .faq-question::after{content:'-';transform:translateY(-50%) rotate(0)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease}
.faq-item.open .faq-answer{max-height:400px;padding:0 24px 18px}
.faq-answer p{font-size:.9rem;color:#8d99ae;line-height:1.8}

/* Reviews */
.section-reviews{background:#0d1117}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:#161b22;border-radius:12px;padding:28px;border:1px solid rgba(141,153,174,.08)}
.review-stars{color:#f0c040;font-size:1.1rem;margin-bottom:14px;letter-spacing:2px}
.review-text{font-size:.92rem;color:#e0e0e0;line-height:1.7;margin-bottom:18px;font-style:italic}
.review-author strong{display:block;font-size:.9rem;color:#f8f9fa}
.review-author span{font-size:.8rem;color:#8d99ae}

/* Contact */
.section-contact{background:#0a0e14}
.contact-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:48px;align-items:start}
.contact-info h3{font-size:1.3rem;margin-bottom:24px;color:#e63946}
.contact-item{margin-bottom:20px}
.contact-item h4{font-size:.95rem;color:#4cc9f0;margin-bottom:6px}
.contact-item p{font-size:.9rem;color:#8d99ae;line-height:1.7}
.contact-qrcodes{display:flex;gap:24px;justify-content:center}
.qrcode-item{text-align:center}
.qrcode-item img{width:160px;height:160px;border-radius:8px;border:2px solid rgba(141,153,174,.15);margin-bottom:8px}
.qrcode-item p{font-size:.85rem;color:#8d99ae}

/* Share */
.section-share{background:#0d1117;padding:48px 0;text-align:center}
.section-share h3{font-size:1.3rem;margin-bottom:24px}
.share-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.share-btn{display:inline-block;padding:10px 28px;border-radius:24px;font-size:.9rem;font-weight:600;transition:all .25s ease}
.share-wechat{background:#07c160;color:#fff}
.share-weibo{background:#e6162d;color:#fff}
.share-douyin{background:#161823;color:#fff;border:1px solid #fe2c55}
.share-bilibili{background:#00a1d6;color:#fff}
.share-btn:hover{transform:translateY(-2px);opacity:.9;color:#fff}

/* Footer */
.site-footer{background:#080b10;border-top:1px solid rgba(141,153,174,.1);padding:48px 0 0}
.footer-top{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px;padding-bottom:36px}
.footer-brand p{font-size:.88rem;color:#8d99ae;line-height:1.7;margin-top:16px}
.footer-logo{height:36px;width:auto;margin-bottom:4px}
.footer-links h4,.footer-contact h4{font-size:1rem;margin-bottom:16px;color:#f8f9fa}
.footer-links ul{display:flex;flex-direction:column;gap:8px}
.footer-links a{font-size:.88rem;color:#8d99ae;transition:color .25s ease}
.footer-links a:hover{color:#e63946}
.footer-contact p{font-size:.85rem;color:#8d99ae;line-height:1.8}
.footer-bottom{border-top:1px solid rgba(141,153,174,.08);padding:20px 0;text-align:center}
.footer-bottom p{font-size:.82rem;color:#6c757d}
.footer-bottom a{color:#8d99ae}

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

/* Responsive */
@media(max-width:1024px){
    .video-grid,.community-grid,.review-grid{grid-template-columns:repeat(2,1fr)}
    .expert-grid{grid-template-columns:repeat(2,1fr)}
    .ent-grid{grid-template-columns:repeat(2,1fr)}
    .howto-steps{grid-template-columns:repeat(2,1fr)}
    .ai-card{grid-template-columns:1fr}
    .ai-content{padding:24px}
    .footer-top{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
    .main-nav{display:none;position:absolute;top:68px;left:0;width:100%;background:rgba(13,17,23,.98);padding:16px 0;border-bottom:1px solid rgba(141,153,174,.15)}
    .main-nav.open{display:block}
    .main-nav ul{flex-direction:column;padding:0 24px}
    .main-nav a{padding:12px 16px}
    .menu-toggle{display:flex}
    .hero-content h1{font-size:1.8rem}
    .hero-content h1 span{font-size:2.2rem}
    .hero-stats{gap:24px}
    .stat-item strong{font-size:1.4rem}
    .video-grid,.ent-grid,.community-grid,.expert-grid,.review-grid,.howto-steps{grid-template-columns:1fr}
    .ai-cards-row{grid-template-columns:1fr}
    .contact-grid{grid-template-columns:1fr}
    .contact-qrcodes{justify-content:flex-start}
    .footer-top{grid-template-columns:1fr}
    .section-header h2{font-size:1.5rem}
    .hero-section{min-height:500px;margin-top:100px}
}
@media(max-width:480px){
    html{font-size:14px}
    .hero-content{padding:40px 16px}
    .hero-btns{flex-direction:column;align-items:center}
    .partner-wall{gap:12px}
    .partner-item{padding:14px 24px}
}