/* 91 Garage - 原创样式表 */
/* 配色方案：深灰#1A1A2E / 橙色#E85D04 / 暗蓝#16213E / 浅灰#F0F0F0 / 金属银#C0C0C0 */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
    --gc-dark:#1A1A2E;
    --gc-darker:#0F0F1A;
    --gc-orange:#E85D04;
    --gc-orange-light:#FF7B2E;
    --gc-blue:#16213E;
    --gc-silver:#C0C0C0;
    --gc-light:#F0F0F0;
    --gc-white:#FFFFFF;
    --gc-text:#2D2D2D;
    --gc-text-light:#6B6B6B;
    --gc-radius:8px;
    --gc-shadow:0 4px 20px rgba(0,0,0,0.12);
    --gc-transition:all 0.3s ease;
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--gc-text);background:var(--gc-light);line-height:1.7;overflow-x:hidden}
a{color:var(--gc-orange);text-decoration:none;transition:var(--gc-transition)}
a:hover{color:var(--gc-orange-light)}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}

/* Header */
.gc-header{position:sticky;top:0;z-index:1000;background:var(--gc-dark);border-bottom:2px solid var(--gc-orange);box-shadow:0 2px 12px rgba(0,0,0,0.3)}
.gc-header-inner{max-width:1320px;margin:0 auto;padding:0 1.5rem;display:flex;align-items:center;justify-content:space-between;height:72px}
.gc-logo img{height:50px;width:auto}
.gc-nav ul{display:flex;gap:0.5rem}
.gc-nav a{color:var(--gc-silver);padding:0.5rem 1rem;border-radius:var(--gc-radius);font-size:0.95rem;font-weight:500;transition:var(--gc-transition)}
.gc-nav a:hover,.gc-nav a.active{color:var(--gc-white);background:var(--gc-orange)}
.gc-search{display:flex;align-items:center;background:var(--gc-blue);border-radius:24px;padding:0 0.5rem;border:1px solid rgba(232,93,4,0.3)}
.gc-search input{border:none;background:transparent;padding:0.5rem 0.8rem;width:220px;font-size:0.9rem;color:var(--gc-white);outline:none}
.gc-search input::placeholder{color:var(--gc-silver)}
.gc-search-btn{background:var(--gc-orange);border:none;padding:6px 10px;border-radius:50%;cursor:pointer;color:var(--gc-white);display:flex;align-items:center;justify-content:center}
.gc-mobile-toggle{display:none;background:none;border:none;cursor:pointer;padding:0.5rem}
.gc-mobile-toggle span{display:block;width:24px;height:2px;background:var(--gc-white);margin:5px 0;transition:var(--gc-transition)}

/* Hero */
.gc-hero{position:relative;min-height:520px;display:flex;align-items:center;overflow:hidden}
.gc-hero-bg{position:absolute;inset:0;z-index:0}
.gc-hero-bg img{width:100%;height:100%;object-fit:cover}
.gc-hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(26,26,46,0.92) 0%,rgba(22,33,62,0.85) 50%,rgba(232,93,4,0.2) 100%)}
.gc-hero-content{position:relative;z-index:1;max-width:1320px;margin:0 auto;padding:4rem 1.5rem}
.gc-hero-tags{display:flex;flex-wrap:wrap;gap:0.5rem;margin-bottom:1.2rem}
.gc-hero-tags span{background:rgba(232,93,4,0.25);color:var(--gc-orange-light);padding:0.3rem 0.8rem;border-radius:20px;font-size:0.82rem;border:1px solid rgba(232,93,4,0.4)}
.gc-hero h1{font-size:2.4rem;color:var(--gc-white);margin-bottom:0.8rem;line-height:1.3;text-shadow:0 2px 8px rgba(0,0,0,0.5)}
.gc-hero h2{font-size:1.2rem;color:var(--gc-silver);margin-bottom:1rem;font-weight:400}
.gc-hero-desc{color:rgba(255,255,255,0.8);font-size:1rem;max-width:700px;margin-bottom:1.8rem;line-height:1.8}
.gc-hero-btns{display:flex;gap:1rem;flex-wrap:wrap}

/* Buttons */
.gc-btn{display:inline-block;padding:0.75rem 2rem;border-radius:var(--gc-radius);font-weight:600;font-size:0.95rem;transition:var(--gc-transition);text-align:center}
.gc-btn-primary{background:var(--gc-orange);color:var(--gc-white);border:2px solid var(--gc-orange)}
.gc-btn-primary:hover{background:var(--gc-orange-light);border-color:var(--gc-orange-light);color:var(--gc-white);transform:translateY(-2px);box-shadow:0 6px 20px rgba(232,93,4,0.4)}
.gc-btn-outline{background:transparent;color:var(--gc-white);border:2px solid var(--gc-silver)}
.gc-btn-outline:hover{background:var(--gc-white);color:var(--gc-dark);border-color:var(--gc-white)}
.gc-btn-sm{display:inline-block;padding:0.4rem 1rem;border-radius:var(--gc-radius);font-size:0.85rem;background:var(--gc-orange);color:var(--gc-white);font-weight:500}
.gc-btn-sm:hover{background:var(--gc-orange-light);color:var(--gc-white)}
.gc-btn-sm-outline{background:transparent;border:1px solid var(--gc-orange);color:var(--gc-orange)}
.gc-btn-sm-outline:hover{background:var(--gc-orange);color:var(--gc-white)}

/* Sections */
.gc-section{padding:4rem 0}
.gc-section:nth-child(even){background:var(--gc-white)}
.gc-container{max-width:1320px;margin:0 auto;padding:0 1.5rem}
.gc-section-header{text-align:center;margin-bottom:3rem}
.gc-section-header h1,.gc-section-header h2{font-size:1.9rem;color:var(--gc-dark);margin-bottom:0.6rem;position:relative;display:inline-block}
.gc-section-header h1::after,.gc-section-header h2::after{content:'';position:absolute;bottom:-8px;left:50%;transform:translateX(-50%);width:60px;height:3px;background:var(--gc-orange);border-radius:2px}
.gc-section-header p{color:var(--gc-text-light);font-size:1rem;margin-top:1rem}

/* Video Grid */
.gc-video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.gc-video-card{background:var(--gc-white);border-radius:var(--gc-radius);overflow:hidden;box-shadow:var(--gc-shadow);transition:var(--gc-transition);border:1px solid rgba(0,0,0,0.06)}
.gc-video-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(232,93,4,0.15)}
.gc-video-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;cursor:pointer}
.gc-video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s ease}
.gc-video-card:hover .gc-video-thumb img{transform:scale(1.05)}
.gc-video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,0.8);color:var(--gc-white);padding:2px 8px;border-radius:4px;font-size:0.78rem;font-weight:500}
.gc-play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,0.35);opacity:0;transition:opacity 0.3s ease}
.gc-video-card:hover .gc-play-btn{opacity:1}
.gc-play-btn svg{filter:drop-shadow(0 2px 4px rgba(0,0,0,0.5));transition:transform 0.2s ease}
.gc-video-card:hover .gc-play-btn svg{transform:scale(1.1)}
.gc-video-info{padding:1rem 1.2rem}
.gc-video-info h3{font-size:0.95rem;color:var(--gc-dark);margin-bottom:0.5rem;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.gc-video-info p{font-size:0.85rem;color:var(--gc-text-light);margin-top:0.5rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.gc-video-meta{display:flex;gap:0.8rem;font-size:0.8rem;color:var(--gc-text-light)}
.gc-video-meta span:first-child{color:var(--gc-orange);font-weight:500}

/* Video Filter */
.gc-video-filter{display:flex;gap:0.5rem;flex-wrap:wrap;margin-bottom:2rem;justify-content:center}
.gc-filter-btn{padding:0.5rem 1.2rem;border:1px solid #ddd;border-radius:20px;background:var(--gc-white);cursor:pointer;font-size:0.9rem;transition:var(--gc-transition)}
.gc-filter-btn:hover,.gc-filter-btn.active{background:var(--gc-orange);color:var(--gc-white);border-color:var(--gc-orange)}

/* Feature Grid */
.gc-feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.gc-feature-card{background:var(--gc-white);border-radius:var(--gc-radius);padding:2rem;box-shadow:var(--gc-shadow);transition:var(--gc-transition);border:1px solid rgba(0,0,0,0.06);border-top:3px solid transparent}
.gc-feature-card:hover{transform:translateY(-3px);border-top-color:var(--gc-orange);box-shadow:0 8px 30px rgba(232,93,4,0.1)}
.gc-feature-icon{width:56px;height:56px;border-radius:12px;background:linear-gradient(135deg,var(--gc-dark),var(--gc-blue));display:flex;align-items:center;justify-content:center;margin-bottom:1.2rem;color:var(--gc-orange)}
.gc-feature-card h3{font-size:1.1rem;color:var(--gc-dark);margin-bottom:0.6rem}
.gc-feature-card p{font-size:0.9rem;color:var(--gc-text-light);line-height:1.7}

/* AI Grid */
.gc-ai-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem}
.gc-ai-card{background:linear-gradient(145deg,var(--gc-dark),var(--gc-blue));border-radius:var(--gc-radius);padding:1.8rem;color:var(--gc-white);transition:var(--gc-transition);border:1px solid rgba(232,93,4,0.2)}
.gc-ai-card:hover{transform:translateY(-3px);border-color:var(--gc-orange);box-shadow:0 6px 24px rgba(232,93,4,0.2)}
.gc-ai-icon{width:44px;height:44px;border-radius:10px;background:rgba(232,93,4,0.2);display:flex;align-items:center;justify-content:center;margin-bottom:1rem;color:var(--gc-orange)}
.gc-ai-card h4{font-size:1rem;margin-bottom:0.5rem}
.gc-ai-card p{font-size:0.85rem;color:rgba(255,255,255,0.7);line-height:1.6}

/* Community Grid */
.gc-community-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem}
.gc-community-card{background:var(--gc-white);border-radius:var(--gc-radius);padding:1.8rem;text-align:center;box-shadow:var(--gc-shadow);transition:var(--gc-transition);border:1px solid rgba(0,0,0,0.06)}
.gc-community-card:hover{transform:translateY(-3px);box-shadow:0 6px 24px rgba(232,93,4,0.12)}
.gc-community-icon{width:52px;height:52px;border-radius:50%;background:linear-gradient(135deg,var(--gc-orange),var(--gc-orange-light));display:flex;align-items:center;justify-content:center;margin:0 auto 1rem;color:var(--gc-white)}
.gc-community-card h4{font-size:1rem;color:var(--gc-dark);margin-bottom:0.5rem}
.gc-community-card p{font-size:0.85rem;color:var(--gc-text-light);line-height:1.6}

/* Community Topics */
.gc-community-topics h2{font-size:1.4rem;color:var(--gc-dark);margin-bottom:1.5rem}
.gc-topic-list{display:flex;flex-direction:column;gap:0.8rem}
.gc-topic-item{display:flex;align-items:center;gap:1rem;padding:1rem 1.5rem;background:var(--gc-white);border-radius:var(--gc-radius);box-shadow:0 2px 8px rgba(0,0,0,0.06);transition:var(--gc-transition)}
.gc-topic-item:hover{box-shadow:0 4px 16px rgba(232,93,4,0.1);transform:translateX(4px)}
.gc-topic-hot,.gc-topic-new{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:6px;font-size:0.75rem;font-weight:700;flex-shrink:0}
.gc-topic-hot{background:var(--gc-orange);color:var(--gc-white)}
.gc-topic-new{background:var(--gc-blue);color:var(--gc-white)}
.gc-topic-item h4{font-size:0.95rem;color:var(--gc-dark);flex:1}
.gc-topic-meta{display:flex;gap:1rem;font-size:0.8rem;color:var(--gc-text-light);flex-shrink:0}

/* Expert Grid */
.gc-expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}
.gc-expert-card{background:var(--gc-white);border-radius:var(--gc-radius);padding:1.8rem;text-align:center;box-shadow:var(--gc-shadow);transition:var(--gc-transition);border:1px solid rgba(0,0,0,0.06)}
.gc-expert-card:hover{transform:translateY(-3px);box-shadow:0 8px 30px rgba(232,93,4,0.12)}
.gc-expert-avatar{margin-bottom:1rem}
.gc-avatar-placeholder{width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,var(--gc-dark),var(--gc-blue));display:flex;align-items:center;justify-content:center;margin:0 auto;color:var(--gc-orange);font-size:1.4rem;font-weight:700;border:2px solid var(--gc-orange)}
.gc-expert-card h4{font-size:1.1rem;color:var(--gc-dark);margin-bottom:0.3rem}
.gc-expert-title{font-size:0.85rem;color:var(--gc-orange);font-weight:500;margin-bottom:0.6rem}
.gc-expert-desc{font-size:0.85rem;color:var(--gc-text-light);line-height:1.6;margin-bottom:0.8rem}
.gc-expert-tags{display:flex;flex-wrap:wrap;gap:0.4rem;justify-content:center;margin-bottom:1rem}
.gc-expert-tags span{background:rgba(232,93,4,0.1);color:var(--gc-orange);padding:0.2rem 0.6rem;border-radius:12px;font-size:0.75rem}
.gc-expert-btns{display:flex;gap:0.5rem;justify-content:center}

/* Partner Wall */
.gc-partner-wall{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;margin-bottom:3rem}
.gc-partner-item{background:var(--gc-white);border-radius:var(--gc-radius);padding:1.5rem;text-align:center;box-shadow:0 2px 8px rgba(0,0,0,0.06);transition:var(--gc-transition);border:1px solid rgba(0,0,0,0.06)}
.gc-partner-item:hover{border-color:var(--gc-orange);box-shadow:0 4px 16px rgba(232,93,4,0.1)}
.gc-partner-item span{font-size:1.2rem;font-weight:700;color:var(--gc-dark);letter-spacing:1px}

/* HowTo */
.gc-howto{background:linear-gradient(145deg,var(--gc-dark),var(--gc-blue));border-radius:var(--gc-radius);padding:2.5rem;color:var(--gc-white)}
.gc-howto h3{font-size:1.4rem;margin-bottom:1.5rem;text-align:center}
.gc-howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}
.gc-howto-step{text-align:center}
.gc-step-num{width:40px;height:40px;border-radius:50%;background:var(--gc-orange);display:flex;align-items:center;justify-content:center;margin:0 auto 0.8rem;font-size:1.1rem;font-weight:700}
.gc-howto-step h5{font-size:0.95rem;margin-bottom:0.4rem}
.gc-howto-step p{font-size:0.82rem;color:rgba(255,255,255,0.7);line-height:1.5}

/* FAQ */
.gc-faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:0.8rem}
.gc-faq-item{background:var(--gc-white);border-radius:var(--gc-radius);box-shadow:0 2px 8px rgba(0,0,0,0.06);overflow:hidden;border:1px solid rgba(0,0,0,0.06)}
.gc-faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;padding:1.2rem 1.5rem;background:none;border:none;cursor:pointer;font-size:1rem;font-weight:500;color:var(--gc-dark);text-align:left;transition:var(--gc-transition)}
.gc-faq-question:hover{color:var(--gc-orange)}
.gc-faq-question svg{flex-shrink:0;transition:transform 0.3s ease;color:var(--gc-orange)}
.gc-faq-item.active .gc-faq-question svg{transform:rotate(180deg)}
.gc-faq-answer{max-height:0;overflow:hidden;transition:max-height 0.4s ease,padding 0.4s ease}
.gc-faq-item.active .gc-faq-answer{max-height:300px;padding:0 1.5rem 1.2rem}
.gc-faq-answer p{font-size:0.9rem;color:var(--gc-text-light);line-height:1.8}

/* Reviews */
.gc-review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.gc-review-card{background:var(--gc-white);border-radius:var(--gc-radius);padding:1.8rem;box-shadow:var(--gc-shadow);border:1px solid rgba(0,0,0,0.06);transition:var(--gc-transition)}
.gc-review-card:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(232,93,4,0.1)}
.gc-review-stars{margin-bottom:0.8rem}
.gc-review-stars span{color:var(--gc-orange);font-size:1.1rem}
.gc-review-text{font-size:0.9rem;color:var(--gc-text);line-height:1.7;margin-bottom:1rem;font-style:italic}
.gc-review-author{display:flex;justify-content:space-between;align-items:center}
.gc-author-name{font-weight:600;color:var(--gc-dark);font-size:0.85rem}
.gc-author-role{font-size:0.78rem;color:var(--gc-orange);background:rgba(232,93,4,0.1);padding:0.2rem 0.6rem;border-radius:10px}

/* Contact */
.gc-contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:2rem}
.gc-contact-card{background:var(--gc-white);border-radius:var(--gc-radius);padding:2rem;box-shadow:var(--gc-shadow);border:1px solid rgba(0,0,0,0.06)}
.gc-contact-card h4{font-size:1.2rem;color:var(--gc-dark);margin-bottom:1rem;padding-bottom:0.8rem;border-bottom:2px solid var(--gc-orange)}
.gc-contact-card ul{display:flex;flex-direction:column;gap:0.6rem}
.gc-contact-card li{font-size:0.9rem;color:var(--gc-text-light);line-height:1.6}
.gc-qrcodes{display:flex;gap:1.5rem;margin-top:1.2rem}
.gc-qrcode{text-align:center}
.gc-qrcode img{border-radius:6px;margin-bottom:0.4rem}
.gc-qrcode span{font-size:0.8rem;color:var(--gc-text-light)}

/* Share */
.gc-share{text-align:center;padding:2.5rem 0;background:var(--gc-white)}
.gc-share h3{font-size:1.2rem;color:var(--gc-dark);margin-bottom:1rem}
.gc-share-bar{display:flex;gap:0.8rem;justify-content:center;flex-wrap:wrap}
.gc-share-btn{padding:0.5rem 1.2rem;border-radius:20px;font-size:0.85rem;color:var(--gc-white);font-weight:500;transition:var(--gc-transition)}
.gc-share-wechat{background:#07C160}
.gc-share-weibo{background:#E6162D}
.gc-share-douyin{background:#000000}
.gc-share-bilibili{background:#00A1D6}
.gc-share-qq{background:#12B7F5}
.gc-share-btn:hover{opacity:0.85;color:var(--gc-white);transform:translateY(-2px)}

/* CTA Box */
.gc-cta-box{background:linear-gradient(135deg,var(--gc-dark),var(--gc-blue));border-radius:var(--gc-radius);padding:3rem;text-align:center;margin-top:3rem;border:1px solid rgba(232,93,4,0.3)}
.gc-cta-box h3{color:var(--gc-white);font-size:1.5rem;margin-bottom:0.8rem}
.gc-cta-box p{color:rgba(255,255,255,0.7);font-size:0.95rem;margin-bottom:1.5rem;max-width:600px;margin-left:auto;margin-right:auto}

/* Footer */
.gc-footer{background:var(--gc-darker);color:var(--gc-silver);padding:3rem 0 0}
.gc-footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:2rem;padding-bottom:2rem;border-bottom:1px solid rgba(255,255,255,0.1)}
.gc-footer-logo img{height:50px;width:auto;margin-bottom:1rem}
.gc-footer-col p{font-size:0.85rem;color:rgba(255,255,255,0.6);line-height:1.7}
.gc-footer-col h5{color:var(--gc-white);font-size:1rem;margin-bottom:1rem;position:relative;padding-bottom:0.5rem}
.gc-footer-col h5::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:var(--gc-orange)}
.gc-footer-col ul{display:flex;flex-direction:column;gap:0.5rem}
.gc-footer-col a{color:rgba(255,255,255,0.6);font-size:0.85rem;transition:var(--gc-transition)}
.gc-footer-col a:hover{color:var(--gc-orange)}
.gc-footer-qrcodes{margin-top:0.8rem}
.gc-footer-qrcodes img{border-radius:4px}
.gc-footer-bottom{padding:1.5rem 0;text-align:center}
.gc-footer-bottom p{font-size:0.82rem;color:rgba(255,255,255,0.5);margin-bottom:0.3rem}
.gc-footer-bottom a{color:var(--gc-orange)}

/* Breadcrumb */
.gc-breadcrumb{max-width:1320px;margin:0 auto;padding:1rem 1.5rem;font-size:0.85rem;color:var(--gc-text-light)}
.gc-breadcrumb a{color:var(--gc-orange)}

/* Responsive */
@media(max-width:1024px){
    .gc-video-grid{grid-template-columns:repeat(2,1fr)}
    .gc-feature-grid{grid-template-columns:repeat(2,1fr)}
    .gc-ai-grid{grid-template-columns:repeat(2,1fr)}
    .gc-community-grid{grid-template-columns:repeat(2,1fr)}
    .gc-expert-grid{grid-template-columns:repeat(2,1fr)}
    .gc-review-grid{grid-template-columns:repeat(2,1fr)}
    .gc-partner-wall{grid-template-columns:repeat(3,1fr)}
    .gc-howto-steps{grid-template-columns:repeat(2,1fr);gap:1rem}
    .gc-footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
    .gc-nav{display:none;position:absolute;top:72px;left:0;right:0;background:var(--gc-dark);padding:1rem;border-top:1px solid rgba(232,93,4,0.3)}
    .gc-nav.active{display:block}
    .gc-nav ul{flex-direction:column}
    .gc-mobile-toggle{display:block}
    .gc-search{display:none}
    .gc-hero{min-height:400px}
    .gc-hero h1{font-size:1.6rem}
    .gc-hero h2{font-size:1rem}
    .gc-hero-content{padding:2.5rem 1.5rem}
    .gc-video-grid{grid-template-columns:1fr}
    .gc-feature-grid{grid-template-columns:1fr}
    .gc-ai-grid{grid-template-columns:1fr}
    .gc-community-grid{grid-template-columns:1fr}
    .gc-expert-grid{grid-template-columns:1fr}
    .gc-review-grid{grid-template-columns:1fr}
    .gc-contact-grid{grid-template-columns:1fr}
    .gc-partner-wall{grid-template-columns:repeat(2,1fr)}
    .gc-howto-steps{grid-template-columns:1fr}
    .gc-footer-grid{grid-template-columns:1fr;gap:1.5rem}
    .gc-section{padding:2.5rem 0}
    .gc-section-header h1,.gc-section-header h2{font-size:1.4rem}
    .gc-topic-meta{display:none}
}
@media(max-width:480px){
    .gc-header-inner{height:60px}
    .gc-hero{min-height:350px}
    .gc-hero h1{font-size:1.3rem}
    .gc-hero-btns{flex-direction:column}
    .gc-btn{width:100%;text-align:center}
}