/* ========================================
   海角网 - 奔驰风格修车改装视频社区
   域名: jsjjtjy.cn
   配色: 奔驰黑银 #0d0d0d / #c0c0c0 / #1a1a2e
   ======================================== */

/* === 基础重置 === */
*,*::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:#0d0d0d;color:#e0e0e0;line-height:1.8;overflow-x:hidden}
a{color:#c0c0c0;text-decoration:none;transition:color .3s}
a:hover{color:#fff}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* === 顶部导航 === */
.site-header{background:linear-gradient(180deg,#0a0a0a 0%,#141428 100%);position:sticky;top:0;z-index:1000;border-bottom:1px solid #2a2a3a;box-shadow:0 2px 20px rgba(0,0,0,.6)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;max-width:1200px;margin:0 auto}
.logo-area{display:flex;align-items:center;gap:10px}
.logo-area img{height:48px;width:auto}
.logo-area h1{font-size:1.4rem;color:#fff;font-weight:700;letter-spacing:1px}
.logo-area h1 span{color:#c0c0c0}
.main-nav{display:flex;gap:6px}
.main-nav a{padding:8px 16px;border-radius:6px;font-size:.9rem;color:#b0b0b0;transition:all .3s}
.main-nav a:hover,.main-nav a.active{background:rgba(192,192,192,.12);color:#fff}
.mobile-menu-btn{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* === 搜索框 === */
.search-bar{background:#111122;padding:14px 0;border-bottom:1px solid #1e1e30}
.search-bar form{max-width:600px;margin:0 auto;display:flex;gap:8px;padding:0 20px}
.search-bar input{flex:1;padding:10px 18px;border:1px solid #2a2a3a;border-radius:25px;background:#0d0d1a;color:#e0e0e0;font-size:.95rem;outline:none;transition:border-color .3s}
.search-bar input:focus{border-color:#c0c0c0}
.search-bar button{padding:10px 24px;background:linear-gradient(135deg,#808080,#c0c0c0);color:#0d0d0d;border:none;border-radius:25px;cursor:pointer;font-weight:600;transition:transform .2s}
.search-bar button:hover{transform:scale(1.05)}

/* === Banner === */
.hero-banner{position:relative;height:520px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hero-banner img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;filter:brightness(.45)}
.hero-content{position:relative;z-index:2;text-align:center;padding:0 20px}
.hero-content h2{font-size:2.8rem;color:#fff;margin-bottom:16px;text-shadow:0 4px 20px rgba(0,0,0,.7);letter-spacing:2px}
.hero-content h2 em{font-style:normal;color:#c0c0c0}
.hero-content p{font-size:1.15rem;color:#d0d0d0;max-width:700px;margin:0 auto 24px;line-height:1.9;text-shadow:0 2px 10px rgba(0,0,0,.5)}
.hero-content .btn-group{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn-primary{padding:12px 32px;background:linear-gradient(135deg,#808080,#c0c0c0);color:#0d0d0d;border-radius:30px;font-weight:700;font-size:1rem;transition:all .3s;border:none;cursor:pointer}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(192,192,192,.3);color:#0d0d0d}
.btn-outline{padding:12px 32px;border:2px solid #c0c0c0;color:#c0c0c0;border-radius:30px;font-weight:600;font-size:1rem;transition:all .3s;background:transparent}
.btn-outline:hover{background:rgba(192,192,192,.15);color:#fff}

/* === 通用板块 === */
.section{padding:60px 0}
.section-dark{background:#0a0a14}
.section-alt{background:#111125}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:2rem;color:#fff;margin-bottom:10px;position:relative;display:inline-block}
.section-title h2::after{content:'';position:absolute;bottom:-8px;left:50%;transform:translateX(-50%);width:60px;height:3px;background:linear-gradient(90deg,#808080,#c0c0c0);border-radius:2px}
.section-title p{color:#999;font-size:1rem;margin-top:16px}

/* === 视频卡片网格 === */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:#141428;border-radius:12px;overflow:hidden;transition:all .4s;border:1px solid #1e1e30;position:relative}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 35px rgba(192,192,192,.08);border-color:#3a3a4a}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;cursor:pointer}
.video-thumb img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .video-thumb img{transform:scale(1.08)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(0);width:60px;height:60px;background:rgba(192,192,192,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all .4s;z-index:3}
.play-btn::after{content:'';width:0;height:0;border-left:20px solid #0d0d0d;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-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}
.video-info{padding:16px}
.video-info h3{font-size:1rem;color:#e8e8e8;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:12px;color:#888;font-size:.8rem}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tags{display:flex;gap:6px;margin-top:10px;flex-wrap:wrap}
.video-tags span{padding:3px 10px;background:rgba(192,192,192,.08);border-radius:12px;font-size:.72rem;color:#aaa}

/* === 分类标签 === */
.tab-nav{display:flex;gap:10px;justify-content:center;margin-bottom:30px;flex-wrap:wrap}
.tab-nav a{padding:8px 22px;border:1px solid #2a2a3a;border-radius:20px;color:#999;font-size:.9rem;transition:all .3s}
.tab-nav a:hover,.tab-nav a.active{background:linear-gradient(135deg,#808080,#c0c0c0);color:#0d0d0d;border-color:transparent}

/* === 专家团队 === */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.expert-card{background:#141428;border-radius:12px;padding:28px;text-align:center;border:1px solid #1e1e30;transition:all .4s}
.expert-card:hover{border-color:#c0c0c0;transform:translateY(-4px)}
.expert-card img{width:100px;height:100px;border-radius:50%;margin:0 auto 16px;object-fit:cover;border:3px solid #2a2a3a}
.expert-card h4{color:#fff;font-size:1.05rem;margin-bottom:6px}
.expert-card .role{color:#c0c0c0;font-size:.85rem;margin-bottom:10px}
.expert-card p{color:#999;font-size:.85rem;line-height:1.7}
.expert-card .btn-sm{display:inline-block;margin-top:12px;padding:6px 18px;border:1px solid #c0c0c0;border-radius:16px;color:#c0c0c0;font-size:.8rem;transition:all .3s}
.expert-card .btn-sm:hover{background:#c0c0c0;color:#0d0d0d}

/* === AI赋能 === */
.ai-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.ai-card{background:linear-gradient(145deg,#141428,#1a1a35);border-radius:14px;padding:30px;border:1px solid #1e1e30;transition:all .4s}
.ai-card:hover{border-color:#c0c0c0;box-shadow:0 0 30px rgba(192,192,192,.06)}
.ai-card .icon{font-size:2.2rem;margin-bottom:14px}
.ai-card h4{color:#fff;font-size:1.1rem;margin-bottom:10px}
.ai-card p{color:#999;font-size:.9rem;line-height:1.8}

/* === 社区统计 === */
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:40px}
.stat-item{text-align:center;padding:28px;background:#141428;border-radius:12px;border:1px solid #1e1e30}
.stat-item .num{font-size:2.2rem;color:#c0c0c0;font-weight:700}
.stat-item .label{color:#999;font-size:.85rem;margin-top:6px}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#141428;border-radius:10px;margin-bottom:12px;border:1px solid #1e1e30;overflow:hidden}
.faq-q{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:#e0e0e0;font-weight:600;transition:background .3s}
.faq-q:hover{background:rgba(192,192,192,.05)}
.faq-q::after{content:'+';font-size:1.4rem;color:#c0c0c0;transition:transform .3s}
.faq-item.active .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 24px}
.faq-item.active .faq-a{max-height:300px;padding:0 24px 18px}
.faq-a p{color:#999;font-size:.9rem;line-height:1.8}

/* === 用户评论 === */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.review-card{background:#141428;border-radius:12px;padding:24px;border:1px solid #1e1e30}
.review-card .stars{color:#c0c0c0;font-size:1rem;margin-bottom:10px;letter-spacing:2px}
.review-card p{color:#bbb;font-size:.9rem;line-height:1.8;margin-bottom:12px;font-style:italic}
.review-card .author{color:#888;font-size:.8rem}

/* === 合作品牌 === */
.brand-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center}
.brand-wall .brand-item{padding:16px 28px;background:#141428;border-radius:10px;border:1px solid #1e1e30;color:#999;font-size:.95rem;transition:all .3s}
.brand-wall .brand-item:hover{border-color:#c0c0c0;color:#fff}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.contact-card{background:#141428;border-radius:12px;padding:28px;border:1px solid #1e1e30;text-align:center}
.contact-card h4{color:#fff;margin-bottom:12px}
.contact-card p{color:#999;font-size:.9rem;line-height:1.8}
.contact-card img{max-width:160px;margin:12px auto 0;border-radius:8px}

/* === 社交分享 === */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-bar a{padding:8px 20px;background:#141428;border:1px solid #1e1e30;border-radius:20px;color:#999;font-size:.85rem;transition:all .3s}
.share-bar a:hover{border-color:#c0c0c0;color:#fff}

/* === 面包屑 === */
.breadcrumb{padding:14px 0;color:#888;font-size:.85rem}
.breadcrumb a{color:#c0c0c0}
.breadcrumb span{margin:0 6px;color:#555}

/* === 页脚 === */
.site-footer{background:#080812;border-top:1px solid #1a1a2e;padding:40px 0 20px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:30px;margin-bottom:30px}
.footer-col h4{color:#fff;font-size:1rem;margin-bottom:14px;position:relative;padding-bottom:8px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:#c0c0c0}
.footer-col p,.footer-col a{color:#888;font-size:.85rem;line-height:2}
.footer-col a:hover{color:#c0c0c0}
.footer-col img{max-width:120px;border-radius:6px;margin-top:8px}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid #1a1a2e;color:#666;font-size:.8rem}
.footer-bottom a{color:#888}

/* === 内页通用 === */
.page-hero{background:linear-gradient(135deg,#0a0a14,#1a1a35);padding:60px 0;text-align:center}
.page-hero h2{font-size:2.2rem;color:#fff;margin-bottom:10px}
.page-hero p{color:#999;font-size:1rem}
.page-content{padding:50px 0}

/* === 响应式 === */
@media(max-width:768px){
  .header-inner{flex-wrap:wrap}
  .main-nav{display:none;width:100%;flex-direction:column;padding-top:10px}
  .main-nav.show{display:flex}
  .mobile-menu-btn{display:block}
  .hero-banner{height:380px}
  .hero-content h2{font-size:1.8rem}
  .stats-row{grid-template-columns:repeat(2,1fr)}
  .video-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .ai-features{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:480px){
  .hero-banner{height:300px}
  .hero-content h2{font-size:1.4rem}
  .stats-row{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr}
  .btn-group{flex-direction:column;align-items:center}
}