/* 91修车改装视频社区 - 原创样式 */
/* 配色：深炭灰#1a1a2e 橙红#e94560 钢蓝#0f3460 浅灰#f5f5f5 */
*{margin:0;padding:0;box-sizing:border-box}
:root{--c-dark:#1a1a2e;--c-accent:#e94560;--c-blue:#0f3460;--c-light:#f5f5f5;--c-gray:#8d99ae;--c-white:#fff;--c-bg:#111122;--c-card:#16213e;--c-border:#2a2a4a;--font-main:'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;--shadow:0 4px 24px rgba(0,0,0,.18);--radius:12px}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-main);color:#e0e0e0;background:var(--c-bg);line-height:1.7}
a{color:var(--c-accent);text-decoration:none;transition:color .2s}
a:hover{color:#ff6b81}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
/* 干扰标签隐藏 */
.nz-wrap{position:absolute;width:0;height:0;overflow:hidden;opacity:0;pointer-events:none;z-index:-9999}
/* 头部导航 */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(17,17,34,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--c-border);transition:background .3s}
.header-inner{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto;padding:10px 20px;height:64px}
.site-logo{display:flex;align-items:center;gap:10px;font-size:1.4rem;font-weight:800;color:var(--c-white);letter-spacing:1px}
.site-logo img{border-radius:6px}
.site-logo span{background:linear-gradient(135deg,var(--c-accent),#ff8a5c);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.main-nav{display:flex;gap:6px}
.main-nav a{color:#c0c0d0;padding:8px 14px;border-radius:8px;font-size:.9rem;font-weight:500;transition:all .2s}
.main-nav a:hover,.main-nav a.active{color:var(--c-white);background:rgba(233,69,96,.15)}
.nav-toggle{display:none;background:none;border:none;color:var(--c-white);font-size:1.5rem;cursor:pointer}
/* 搜索框 */
.search-box{display:flex;align-items:center;gap:8px}
.search-box input{background:rgba(255,255,255,.08);border:1px solid var(--c-border);border-radius:20px;padding:6px 16px;color:#e0e0e0;font-size:.85rem;width:200px;outline:none;transition:all .3s}
.search-box input:focus{border-color:var(--c-accent);width:260px;background:rgba(255,255,255,.12)}
.search-box button{background:var(--c-accent);border:none;color:#fff;padding:6px 14px;border-radius:20px;cursor:pointer;font-size:.85rem;transition:background .2s}
.search-box button:hover{background:#ff6b81}
/* Banner */
.hero-banner{position:relative;min-height:600px;display:flex;align-items:center;justify-content:center;overflow:hidden;margin-top:64px}
.hero-banner .hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.45)}
.hero-banner .hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(17,17,34,.3) 0%,rgba(17,17,34,.85) 100%)}
.hero-content{position:relative;z-index:2;text-align:center;max-width:800px;padding:40px 20px}
.hero-content h1{font-size:2.8rem;font-weight:900;color:var(--c-white);margin-bottom:16px;line-height:1.3}
.hero-content h1 .brand-hl{color:var(--c-accent)}
.hero-content p{font-size:1.1rem;color:#b0b0c0;margin-bottom:28px;line-height:1.8}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{display:inline-block;background:linear-gradient(135deg,var(--c-accent),#ff8a5c);color:#fff;padding:12px 32px;border-radius:30px;font-weight:600;font-size:1rem;transition:transform .2s,box-shadow .2s;border:none;cursor:pointer}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(233,69,96,.4);color:#fff}
.btn-outline{display:inline-block;border:2px solid var(--c-accent);color:var(--c-accent);padding:10px 30px;border-radius:30px;font-weight:600;font-size:1rem;transition:all .2s}
.btn-outline:hover{background:var(--c-accent);color:#fff}
/* 通用区块 */
.section{padding:72px 0}
.section-dark{background:var(--c-bg)}
.section-alt{background:var(--c-dark)}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:2rem;font-weight:800;color:var(--c-white);margin-bottom:12px}
.section-title h2 .hl{color:var(--c-accent)}
.section-title p{color:var(--c-gray);font-size:1rem;max-width:600px;margin:0 auto}
/* 视频卡片网格 */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.video-card{position:relative;background:var(--c-card);border-radius:var(--radius);overflow:hidden;transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 36px rgba(233,69,96,.2)}
.video-thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb img{transform:scale(1.08)}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.8);color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem;font-weight:600}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(0);width:56px;height:56px;background:rgba(233,69,96,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:transform .3s;pointer-events:none}
.play-btn::after{content:'';width:0;height:0;border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:4px}
.video-card:hover .play-btn{transform:translate(-50%,-50%) scale(1)}
.video-info{padding:14px 16px}
.video-info h3{font-size:.92rem;font-weight:600;color:var(--c-white);margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:12px;color:var(--c-gray);font-size:.78rem}
.video-meta span{display:flex;align-items:center;gap:3px}
/* 模块卡片 */
.mod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.mod-card{background:var(--c-card);border-radius:var(--radius);padding:32px 24px;text-align:center;border:1px solid var(--c-border);transition:all .3s}
.mod-card:hover{border-color:var(--c-accent);transform:translateY(-4px);box-shadow:var(--shadow)}
.mod-icon{font-size:2.4rem;margin-bottom:16px}
.mod-card h3{font-size:1.1rem;font-weight:700;color:var(--c-white);margin-bottom:10px}
.mod-card p{color:var(--c-gray);font-size:.88rem;line-height:1.6}
/* 社区卡片 */
.community-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.community-card{background:var(--c-card);border-radius:var(--radius);overflow:hidden;border:1px solid var(--c-border);transition:all .3s}
.community-card:hover{border-color:var(--c-accent);box-shadow:0 8px 24px rgba(233,69,96,.15)}
.community-card .cc-header{padding:20px;text-align:center}
.community-card .cc-tag{display:inline-block;background:rgba(233,69,96,.15);color:var(--c-accent);padding:3px 12px;border-radius:20px;font-size:.75rem;font-weight:600;margin-bottom:10px}
.community-card h3{font-size:1rem;font-weight:700;color:var(--c-white);margin-bottom:8px}
.community-card .cc-stats{display:flex;justify-content:center;gap:16px;color:var(--c-gray);font-size:.8rem}
.topic-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:24px}
.topic-tag{background:var(--c-card);border:1px solid var(--c-border);color:#c0c0d0;padding:6px 18px;border-radius:20px;font-size:.85rem;transition:all .2s}
.topic-tag:hover{border-color:var(--c-accent);color:var(--c-accent)}
/* 专家卡片 */
.expert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.expert-card{background:var(--c-card);border-radius:var(--radius);overflow:hidden;border:1px solid var(--c-border);transition:all .3s}
.expert-card:hover{border-color:var(--c-accent);box-shadow:var(--shadow)}
.expert-photo{width:100%;aspect-ratio:4/3;object-fit:cover}
.expert-info{padding:20px}
.expert-info h3{font-size:1.1rem;font-weight:700;color:var(--c-white);margin-bottom:6px}
.expert-info .role{color:var(--c-accent);font-size:.85rem;font-weight:600;margin-bottom:10px}
.expert-info p{color:var(--c-gray);font-size:.85rem;line-height:1.6;margin-bottom:14px}
.expert-btns{display:flex;gap:10px}
.btn-sm{padding:6px 16px;border-radius:20px;font-size:.8rem;font-weight:600;transition:all .2s;display:inline-block}
.btn-sm.btn-primary{background:var(--c-accent);color:#fff;border:none}
.btn-sm.btn-outline{border:1px solid var(--c-accent);color:var(--c-accent);background:transparent}
.btn-sm:hover{opacity:.85}
/* 品牌墙 */
.brand-wall{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.brand-wall-item{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius);padding:20px;text-align:center;color:#c0c0d0;font-weight:600;font-size:.95rem;transition:all .2s}
.brand-wall-item:hover{border-color:var(--c-accent);color:var(--c-accent)}
/* HowTo步骤 */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.howto-step{background:var(--c-card);border-radius:var(--radius);padding:28px 20px;border:1px solid var(--c-border);position:relative;counter-increment:step}
.howto-step::before{content:counter(step);position:absolute;top:-14px;left:20px;width:32px;height:32px;background:var(--c-accent);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.9rem}
.howto-step h4{color:var(--c-white);font-size:.95rem;margin-bottom:8px;margin-top:8px}
.howto-step p{color:var(--c-gray);font-size:.85rem;line-height:1.6}
/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden}
.faq-question{padding:18px 24px;color:var(--c-white);font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .2s}
.faq-question:hover{background:rgba(233,69,96,.08)}
.faq-question::after{content:'+';font-size:1.3rem;color:var(--c-accent);transition:transform .3s}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all .3s;color:var(--c-gray);font-size:.9rem;line-height:1.7}
.faq-item.active .faq-answer{padding:0 24px 18px;max-height:500px}
/* 评论 */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review-card{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius);padding:24px;transition:all .3s}
.review-card:hover{border-color:var(--c-accent)}
.review-stars{color:#ffc107;font-size:1.1rem;margin-bottom:12px}
.review-text{color:#c0c0d0;font-size:.9rem;line-height:1.7;margin-bottom:14px;font-style:italic}
.review-author{color:var(--c-gray);font-size:.8rem}
.review-author span{color:var(--c-accent);font-weight:600}
/* 联系我们 */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.contact-card{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius);padding:28px}
.contact-card h3{color:var(--c-white);font-size:1.15rem;margin-bottom:16px}
.contact-item{color:#c0c0d0;font-size:.9rem;margin-bottom:10px;line-height:1.6}
.contact-item strong{color:var(--c-white)}
.qrcode-grid{display:flex;gap:24px;margin-top:16px}
.qrcode-item{text-align:center}
.qrcode-item img{border-radius:8px;border:1px solid var(--c-border)}
.qrcode-item p{color:var(--c-gray);font-size:.8rem;margin-top:6px}
/* 分享栏 */
.share-bar{display:flex;align-items:center;gap:12px;justify-content:center;padding:20px 0}
.share-bar span{color:var(--c-gray);font-size:.9rem}
.share-btn{display:inline-block;padding:8px 20px;border-radius:20px;font-size:.85rem;font-weight:600;transition:all .2s;color:#fff}
.share-wechat{background:#07c160}
.share-weibo{background:#e6162d}
.share-douyin{background:#161823}
.share-bilibili{background:#00a1d6}
.share-btn:hover{opacity:.85;color:#fff;transform:translateY(-2px)}
/* 页脚 */
.site-footer{background:var(--c-dark);border-top:1px solid var(--c-border);padding:48px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:32px}
.footer-brand p{color:var(--c-gray);font-size:.85rem;line-height:1.7;margin-top:12px}
.footer-col{display:flex;flex-direction:column;gap:8px}
.footer-col h4{color:var(--c-white);font-size:1rem;margin-bottom:8px}
.footer-col a{color:var(--c-gray);font-size:.85rem;transition:color .2s}
.footer-col a:hover{color:var(--c-accent)}
.footer-bottom{border-top:1px solid var(--c-border);padding:20px 0;text-align:center;color:var(--c-gray);font-size:.8rem}
/* 面包屑 */
.breadcrumb{padding:16px 0;font-size:.85rem;color:var(--c-gray)}
.breadcrumb a{color:var(--c-accent)}
.breadcrumb span{margin:0 6px;color:#666}
/* 内页banner */
.page-hero{background:var(--c-dark);padding:100px 0 40px;text-align:center;border-bottom:1px solid var(--c-border)}
.page-hero h1{font-size:2.2rem;font-weight:800;color:var(--c-white);margin-bottom:12px}
.page-hero p{color:var(--c-gray);font-size:1rem}
/* 响应式 */
@media(max-width:1024px){
.video-grid{grid-template-columns:repeat(3,1fr)}
.mod-grid{grid-template-columns:repeat(2,1fr)}
.community-grid{grid-template-columns:repeat(2,1fr)}
.expert-grid{grid-template-columns:repeat(2,1fr)}
.howto-steps{grid-template-columns:repeat(2,1fr)}
.footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
.main-nav{display:none;position:absolute;top:64px;left:0;width:100%;background:rgba(17,17,34,.98);flex-direction:column;padding:16px;border-bottom:1px solid var(--c-border)}
.main-nav.show{display:flex}
.nav-toggle{display:block}
.search-box{display:none}
.hero-content h1{font-size:1.8rem}
.hero-banner{min-height:480px}
.video-grid{grid-template-columns:repeat(2,1fr)}
.mod-grid{grid-template-columns:1fr}
.community-grid{grid-template-columns:1fr}
.expert-grid{grid-template-columns:1fr}
.review-grid{grid-template-columns:1fr}
.contact-grid{grid-template-columns:1fr}
.brand-wall{grid-template-columns:repeat(2,1fr)}
.howto-steps{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr}
.section{padding:48px 0}
.section-title h2{font-size:1.5rem}
}
@media(max-width:480px){
.video-grid{grid-template-columns:1fr}
.hero-btns{flex-direction:column;align-items:center}
}