/* 91 修车改装视频社区 - 原创样式 */
/* 配色：赛车红 #E8350F | 深夜蓝黑 #1A1A2E | 活力橙 #FF6B35 */

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'PingFang SC','Microsoft YaHei','Helvetica Neue',sans-serif;background:#0F0F1A;color:#F0F0F5;line-height:1.7;overflow-x:hidden}
a{color:#FF6B35;text-decoration:none;transition:color .3s}
a:hover{color:#E8350F}
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{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(15,15,26,.95);backdrop-filter:blur(12px);border-bottom:1px solid rgba(232,53,15,.2);padding:12px 0;transition:all .3s}
.header-inner{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto;padding:0 20px}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{width:48px;height:48px;border-radius:8px}
.logo-wrap h1{font-size:1.5rem;font-weight:800;background:linear-gradient(135deg,#E8350F,#FF6B35);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.main-nav{display:flex;gap:24px}
.main-nav a{color:#F0F0F5;font-size:.95rem;font-weight:500;padding:6px 0;position:relative}
.main-nav a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:#E8350F;transition:width .3s}
.main-nav a:hover::after,.main-nav a.active::after{width:100%}
.main-nav a:hover{color:#FF6B35}

/* Search Box */
.search-bar{background:rgba(30,30,50,.8);border:1px solid rgba(232,53,15,.3);border-radius:30px;padding:10px 20px;display:flex;align-items:center;gap:10px;max-width:600px;margin:0 auto}
.search-bar input{flex:1;background:transparent;border:none;color:#F0F0F5;font-size:.95rem;outline:none}
.search-bar input::placeholder{color:rgba(240,240,245,.4)}
.search-bar button{background:linear-gradient(135deg,#E8350F,#FF6B35);border:none;color:#fff;padding:8px 20px;border-radius:20px;cursor:pointer;font-size:.9rem;font-weight:600;transition:transform .2s}
.search-bar button:hover{transform:scale(1.05)}
.search-section{padding:15px 0;background:rgba(15,15,26,.6)}

/* Banner */
.hero-banner{position:relative;height:70vh;min-height:500px;overflow:hidden;margin-top:72px}
.hero-banner img{width:100%;height:100%;object-fit:cover;filter:brightness(.6)}
.hero-overlay{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:20px;background:linear-gradient(180deg,rgba(15,15,26,.3) 0%,rgba(15,15,26,.8) 100%)}
.hero-overlay h2{font-size:3rem;font-weight:900;margin-bottom:16px;background:linear-gradient(135deg,#fff,#FF6B35);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-overlay p{font-size:1.2rem;color:rgba(240,240,245,.85);max-width:700px;margin-bottom:24px}
.hero-btn{display:inline-block;background:linear-gradient(135deg,#E8350F,#FF6B35);color:#fff;padding:14px 36px;border-radius:30px;font-size:1.05rem;font-weight:700;transition:transform .3s,box-shadow .3s}
.hero-btn:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(232,53,15,.4);color:#fff}

/* Section Common */
.section{padding:80px 0}
.section-title{text-align:center;margin-bottom:50px}
.section-title h2{font-size:2.2rem;font-weight:800;margin-bottom:12px;color:#F0F0F5}
.section-title h2 span{color:#E8350F}
.section-title p{color:rgba(240,240,245,.6);font-size:1.05rem}

/* Video Cards */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{position:relative;border-radius:12px;overflow:hidden;background:#1E1E32;transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 16px 40px rgba(232,53,15,.2)}
.video-card .thumb{position:relative;padding-top:56.25%;overflow:hidden}
.video-card .thumb img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .thumb img{transform:scale(1.08)}
.video-card .play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(0);width:60px;height:60px;background:rgba(232,53,15,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:transform .3s;opacity:0}
.video-card:hover .play-btn{transform:translate(-50%,-50%) scale(1);opacity:1}
.play-btn::after{content:'';width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:4px}
.video-card .card-info{padding:16px}
.video-card .card-info h3{font-size:1rem;font-weight:600;margin-bottom:8px;color:#F0F0F5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-card .card-meta{display:flex;gap:12px;font-size:.8rem;color:rgba(240,240,245,.5)}
.video-card .card-meta span{display:flex;align-items:center;gap:4px}

/* Feature Modules */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.feature-item{background:#1E1E32;border-radius:12px;padding:30px;border:1px solid rgba(232,53,15,.1);transition:all .3s}
.feature-item:hover{border-color:rgba(232,53,15,.5);box-shadow:0 8px 30px rgba(232,53,15,.1)}
.feature-item .icon{width:56px;height:56px;background:linear-gradient(135deg,#E8350F,#FF6B35);border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:20px;font-size:1.5rem}
.feature-item h3{font-size:1.15rem;font-weight:700;margin-bottom:10px;color:#F0F0F5}
.feature-item p{color:rgba(240,240,245,.6);font-size:.95rem;line-height:1.6}

/* Expert Section */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:30px}
.expert-card{background:#1E1E32;border-radius:16px;padding:30px;text-align:center;border:1px solid rgba(232,53,15,.1);transition:all .3s}
.expert-card:hover{border-color:#E8350F;transform:translateY(-4px)}
.expert-card img{width:100px;height:100px;border-radius:50%;object-fit:cover;margin:0 auto 16px;border:3px solid #E8350F}
.expert-card h3{font-size:1.1rem;font-weight:700;margin-bottom:6px}
.expert-card .role{color:#FF6B35;font-size:.9rem;margin-bottom:12px}
.expert-card p{color:rgba(240,240,245,.6);font-size:.9rem;margin-bottom:16px}
.expert-card .btn-sm{display:inline-block;padding:8px 20px;border:1px solid #E8350F;color:#E8350F;border-radius:20px;font-size:.85rem;transition:all .3s}
.expert-card .btn-sm:hover{background:#E8350F;color:#fff}

/* Reviews */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.review-card{background:#1E1E32;border-radius:12px;padding:24px;border-left:3px solid #E8350F}
.review-card .stars{color:#FF6B35;margin-bottom:10px;font-size:1.1rem}
.review-card p{color:rgba(240,240,245,.8);font-size:.95rem;margin-bottom:12px;font-style:italic}
.review-card .reviewer{display:flex;align-items:center;gap:10px;font-size:.85rem;color:rgba(240,240,245,.5)}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#1E1E32;border-radius:10px;margin-bottom:12px;overflow:hidden;border:1px solid rgba(232,53,15,.1)}
.faq-item summary{padding:18px 24px;cursor:pointer;font-weight:600;font-size:1rem;color:#F0F0F5;display:flex;align-items:center;justify-content:space-between}
.faq-item summary:hover{color:#FF6B35}
.faq-item summary::after{content:'+';font-size:1.4rem;color:#E8350F;transition:transform .3s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-answer{padding:0 24px 18px;color:rgba(240,240,245,.7);font-size:.95rem;line-height:1.7}

/* Partners */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-wall .partner-item{background:#1E1E32;padding:16px 28px;border-radius:10px;font-weight:700;font-size:1.1rem;color:rgba(240,240,245,.7);border:1px solid rgba(232,53,15,.1);transition:all .3s}
.partner-wall .partner-item:hover{border-color:#E8350F;color:#FF6B35}

/* Contact */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:30px}
.contact-card{background:#1E1E32;border-radius:12px;padding:24px;text-align:center}
.contact-card h3{font-size:1.1rem;font-weight:700;margin-bottom:12px;color:#FF6B35}
.contact-card p{color:rgba(240,240,245,.7);font-size:.9rem;margin-bottom:8px}
.contact-card img{width:150px;height:150px;margin:12px auto 0;border-radius:8px}

/* Footer */
.site-footer{background:#0A0A14;padding:50px 0 20px;border-top:1px solid rgba(232,53,15,.2)}
.footer-top{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:30px;margin-bottom:40px}
.footer-col h4{font-size:1rem;font-weight:700;margin-bottom:16px;color:#FF6B35}
.footer-col a{display:block;color:rgba(240,240,245,.6);font-size:.9rem;margin-bottom:8px}
.footer-col a:hover{color:#E8350F}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(240,240,245,.1);color:rgba(240,240,245,.4);font-size:.85rem}
.footer-bottom p{margin-bottom:6px}

/* Share Buttons */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}
.share-bar a{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;background:#1E1E32;border:1px solid rgba(232,53,15,.2);border-radius:20px;color:rgba(240,240,245,.7);font-size:.85rem;transition:all .3s}
.share-bar a:hover{border-color:#E8350F;color:#E8350F;background:rgba(232,53,15,.1)}

/* Mobile Nav */
.nav-toggle{display:none;background:none;border:none;color:#F0F0F5;font-size:1.5rem;cursor:pointer}

/* Breadcrumb */
.breadcrumb{padding:12px 0;font-size:.85rem;color:rgba(240,240,245,.5)}
.breadcrumb a{color:rgba(240,240,245,.5)}
.breadcrumb a:hover{color:#FF6B35}
.breadcrumb span{margin:0 8px}

/* Responsive */
@media(max-width:768px){
  .main-nav{display:none;position:absolute;top:100%;left:0;width:100%;background:rgba(15,15,26,.98);flex-direction:column;padding:20px;gap:16px}
  .main-nav.active{display:flex}
  .nav-toggle{display:block}
  .hero-banner{height:50vh;min-height:350px}
  .hero-overlay h2{font-size:1.8rem}
  .hero-overlay p{font-size:1rem}
  .section{padding:50px 0}
  .section-title h2{font-size:1.6rem}
  .video-grid,.feature-grid,.expert-grid,.review-grid,.contact-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:repeat(2,1fr)}
  .header-inner{flex-wrap:wrap}
  .logo-wrap h1{font-size:1.2rem}
}
@media(max-width:480px){
  .footer-top{grid-template-columns:1fr}
  .partner-wall{gap:15px}
  .partner-wall .partner-item{padding:12px 18px;font-size:.95rem}
}