/* 无限臀山 - 原创CSS样式 */
/* 配色：深炭灰#1a1d23 + 赛车橙#e8650a + 钢铁蓝#3a7bd5 + 银灰#c0c5ce */
:root{--bg-dark:#1a1d23;--bg-card:#22262e;--bg-light:#2c313a;--accent:#e8650a;--accent2:#3a7bd5;--silver:#c0c5ce;--text:#e8eaed;--text-sub:#9aa0a9;--radius:10px;--shadow:0 4px 20px rgba(0,0,0,.35)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg-dark);color:var(--text);line-height:1.7}
a{color:var(--accent);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent2)}
img{max-width:100%;height:auto;display:block}
.sbld538{max-width:1200px;margin:0 auto;padding:0 20px}
.us2qa75i{max-width:1400px;margin:0 auto;padding:0 20px}

/* 头部导航 */
.ypt76u{position:sticky;top:0;z-index:1000;background:rgba(26,29,35,.96);backdrop-filter:blur(12px);border-bottom:1px solid rgba(232,101,10,.15)}
.ckw79i2g{display:flex;align-items:center;justify-content:space-between;height:68px;max-width:1400px;margin:0 auto;padding:0 20px}
.yzdgl{display:flex;align-items:center;gap:10px}
.yzdgl img{height:42px;width:auto}
.yzdgl span{font-size:1.4rem;font-weight:800;color:#fff;letter-spacing:1px}
.main-menu{display:flex;gap:6px;list-style:none}
.main-menu a{display:block;padding:8px 16px;border-radius:6px;color:var(--text);font-size:.92rem;font-weight:500;transition:all .2s}
.main-menu a:hover,.main-menu a.active{background:var(--accent);color:#fff}
.kul01z44{display:flex;align-items:center;gap:12px}
.menu-btn{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* 搜索栏 */
.xj9agras{background:var(--bg-card);padding:14px 0;border-bottom:1px solid rgba(255,255,255,.06)}
.search-box{display:flex;max-width:680px;margin:0 auto;gap:0}
.search-box input{flex:1;padding:10px 18px;border:2px solid var(--accent);border-right:none;border-radius:var(--radius) 0 0 var(--radius);background:var(--bg-dark);color:#fff;font-size:.95rem;outline:none}
.search-box input:focus{border-color:var(--accent2)}
.search-box button{padding:10px 28px;background:var(--accent);color:#fff;border:2px solid var(--accent);border-radius:0 var(--radius) var(--radius) 0;cursor:pointer;font-size:.95rem;font-weight:600;transition:background .2s}
.search-box button:hover{background:#d45a08}
.jbm3x8x0{display:flex;gap:8px;justify-content:center;margin-top:8px;flex-wrap:wrap}
.jbm3x8x0 a{font-size:.8rem;color:var(--text-sub);padding:2px 10px;background:var(--bg-light);border-radius:20px;transition:all .2s}
.jbm3x8x0 a:hover{color:var(--accent);background:rgba(232,101,10,.12)}

/* Banner区 */
.veznk7x{position:relative;overflow:hidden;height:520px;display:flex;align-items:center}
.veznk7x img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.f9q3he7{position:absolute;inset:0;background:linear-gradient(135deg,rgba(26,29,35,.88) 0%,rgba(26,29,35,.5) 50%,rgba(232,101,10,.15) 100%)}
.ebpekr{position:relative;z-index:2;max-width:700px;padding:0 40px}
.ebpekr h1{font-size:2.6rem;font-weight:900;line-height:1.3;margin-bottom:16px}
.ebpekr h1 em{font-style:normal;color:var(--accent)}
.ebpekr p{font-size:1.1rem;color:var(--silver);margin-bottom:24px;line-height:1.8}
.wdfhh0cb{display:flex;gap:14px;flex-wrap:wrap}
.em4tvr3v{display:inline-block;padding:12px 30px;border-radius:var(--radius);font-weight:600;font-size:.95rem;transition:all .25s;cursor:pointer;border:none}
.vo5c5i{background:var(--accent);color:#fff}
.vo5c5i:hover{background:#d45a08;transform:translateY(-2px);box-shadow:0 6px 20px rgba(232,101,10,.4)}
.vpuhh{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.3)}
.vpuhh:hover{border-color:var(--accent);color:var(--accent)}

/* 通用区块 */
.s7hv3w{padding:60px 0}
.p118bqqa{text-align:center;margin-bottom:40px}
.p118bqqa h2{font-size:1.9rem;font-weight:800;margin-bottom:8px}
.p118bqqa h2 em{font-style:normal;color:var(--accent)}
.p118bqqa p{color:var(--text-sub);font-size:1rem}
.e6izj3{background:var(--bg-card)}

/* 视频卡片网格 */
.fwh88df{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.zv0sbal8{background:var(--bg-card);border-radius:var(--radius);overflow:hidden;transition:transform .3s,box-shadow .3s;cursor:pointer}
.zv0sbal8:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.w7pklz{position:relative;padding-top:56.25%;overflow:hidden}
.w7pklz img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.zv0sbal8:hover .w7pklz img{transform:scale(1.08)}
.zw4egrm7{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;background:rgba(0,0,0,.4)}
.zv0sbal8:hover .zw4egrm7{opacity:1}
.zw4egrm7 i{width:56px;height:56px;background:var(--accent);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0}
.zw4egrm7 i::after{content:'';border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:4px}
.b0o4kvx{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:.78rem}
.fh1gb9wx{position:absolute;top:8px;left:8px;background:var(--accent);color:#fff;padding:2px 10px;border-radius:4px;font-size:.75rem;font-weight:600}
.dfc74x5{padding:14px}
.dfc74x5 h3{font-size:.95rem;font-weight:600;margin-bottom:6px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.eqbyw{display:flex;gap:12px;color:var(--text-sub);font-size:.8rem}
.bjxbv5s{display:flex;gap:10px;margin-top:6px;color:var(--text-sub);font-size:.78rem}

/* 分类标签 */
.l4iev{display:flex;gap:8px;justify-content:center;margin-bottom:30px;flex-wrap:wrap}
.l4iev a{padding:8px 20px;background:var(--bg-light);color:var(--text-sub);border-radius:20px;font-size:.88rem;transition:all .2s}
.l4iev a:hover,.l4iev a.on{background:var(--accent);color:#fff}

/* 修车传媒模块 */
.pghw1zlj{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.v3l75uqu{background:var(--bg-card);border-radius:var(--radius);padding:28px 24px;text-align:center;transition:all .3s;border:1px solid transparent}
.v3l75uqu:hover{border-color:var(--accent);transform:translateY(-4px)}
.v3l75uqu .ico{font-size:2.4rem;margin-bottom:14px}
.v3l75uqu h4{font-size:1.05rem;font-weight:700;margin-bottom:8px}
.v3l75uqu p{color:var(--text-sub);font-size:.88rem;line-height:1.6}

/* AI赋能 */
.r23xy6r{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.wlzzc{background:linear-gradient(135deg,var(--bg-card) 0%,rgba(58,123,213,.08) 100%);border-radius:var(--radius);padding:30px 24px;border:1px solid rgba(58,123,213,.15);transition:all .3s}
.wlzzc:hover{border-color:var(--accent2);box-shadow:0 0 30px rgba(58,123,213,.15)}
.wlzzc .ico{font-size:2.2rem;margin-bottom:12px}
.wlzzc h4{font-size:1.05rem;font-weight:700;margin-bottom:8px;color:var(--accent2)}
.wlzzc p{color:var(--text-sub);font-size:.88rem;line-height:1.6}

/* 社区功能 */
.o4numit{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.l2ua0f{background:var(--bg-card);border-radius:var(--radius);padding:24px;text-align:center;transition:all .3s;border-left:3px solid var(--accent)}
.l2ua0f:hover{background:var(--bg-light)}
.l2ua0f .ico{font-size:2rem;margin-bottom:10px}
.l2ua0f h4{font-size:1rem;font-weight:700;margin-bottom:6px}
.l2ua0f p{color:var(--text-sub);font-size:.85rem}

/* 专家展示 */
.l8qbi{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.bb5590vy{background:var(--bg-card);border-radius:var(--radius);overflow:hidden;text-align:center;transition:all .3s}
.bb5590vy:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.bb5590vy img{width:100%;height:220px;object-fit:cover}
.kky18som{padding:20px}
.kky18som h4{font-size:1.05rem;font-weight:700;margin-bottom:4px}
.kky18som .m8j0l{color:var(--accent);font-size:.85rem;margin-bottom:8px}
.kky18som p{color:var(--text-sub);font-size:.85rem;line-height:1.6;margin-bottom:12px}
.sr9n7n{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;margin-bottom:12px}
.sr9n7n span{font-size:.75rem;padding:3px 10px;background:var(--bg-light);border-radius:20px;color:var(--silver)}
.f72w0b3{display:flex;gap:10px;justify-content:center}
.f72w0b3 a{padding:6px 16px;border-radius:6px;font-size:.82rem;font-weight:600}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--bg-card);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;border:1px solid rgba(255,255,255,.06)}
.faq-q{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:.95rem;transition:background .2s}
.faq-q:hover{background:var(--bg-light)}
.faq-q .t72dheu{transition:transform .3s;color:var(--accent);font-size:1.2rem}
.faq-q.open .t72dheu{transform:rotate(180deg)}
.faq-a{padding:0 24px;max-height:0;overflow:hidden;transition:all .3s;color:var(--text-sub);font-size:.9rem;line-height:1.7}
.faq-a.show{padding:0 24px 18px;max-height:500px}

/* 用户评论 */
.qgs0j7{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.r14f9la{background:var(--bg-card);border-radius:var(--radius);padding:24px;transition:all .3s}
.r14f9la:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.m6qhveg{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.m6qhveg .umg7d{width:44px;height:44px;border-radius:50%;background:var(--accent);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.1rem}
.m6qhveg .name{font-weight:600;font-size:.92rem}
.m6qhveg .xdb0znu5{color:var(--text-sub);font-size:.78rem}
.li8mf{color:#f5a623;font-size:.9rem;margin-bottom:8px}
.r14f9la p{color:var(--text-sub);font-size:.88rem;line-height:1.6}

/* 合作品牌 */
.g7rom7{display:flex;gap:24px;justify-content:center;flex-wrap:wrap;align-items:center}
.g7rom7 span{background:var(--bg-card);padding:14px 28px;border-radius:var(--radius);font-size:1rem;font-weight:700;color:var(--silver);border:1px solid rgba(255,255,255,.06);transition:all .2s}
.g7rom7 span:hover{border-color:var(--accent);color:var(--accent)}

/* How-To */
.uc27w4e8{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.wpy4ccz{text-align:center;padding:24px 16px}
.wpy4ccz .uic2r{width:48px;height:48px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.3rem;font-weight:800;margin:0 auto 14px}
.wpy4ccz h4{font-size:.95rem;font-weight:700;margin-bottom:6px}
.wpy4ccz p{color:var(--text-sub);font-size:.84rem}

/* 联系我们 */
.j4ebl5js{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.b67lodn{background:var(--bg-card);border-radius:var(--radius);padding:30px}
.a6o5zdu{display:flex;gap:14px;margin-bottom:20px;align-items:flex-start}
.a6o5zdu .ico{font-size:1.5rem;color:var(--accent);min-width:30px;text-align:center}
.a6o5zdu .pk1csh h4{font-size:.95rem;font-weight:600;margin-bottom:2px}
.a6o5zdu .pk1csh p{color:var(--text-sub);font-size:.88rem}
.sow5jb{display:flex;gap:20px;margin-top:20px}
.yhw5s{text-align:center}
.yhw5s img{width:120px;height:120px;border-radius:8px;background:var(--bg-light)}
.yhw5s span{display:block;margin-top:6px;font-size:.8rem;color:var(--text-sub)}

/* 分享按钮 */
.wa0dg{display:flex;gap:10px;justify-content:center;margin-top:20px}
.wa0dg a{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1rem;color:#fff;transition:all .2s}
.wa0dg a:hover{transform:scale(1.15)}
.qxak9i{background:#07c160}
.dp3to4o{background:#e6162d}
.xyyqr{background:#161823}
.ecfzn{background:#00a1d6}
.ud9k6{background:#12b7f5}

/* 数据统计 */
.nw0vp{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center;padding:40px 0}
.cd0mrd .uic2r{font-size:2.4rem;font-weight:900;color:var(--accent)}
.cd0mrd .b3tdfbs{color:var(--text-sub);font-size:.88rem;margin-top:4px}

/* 页脚 */
.coixgdjw{background:var(--bg-card);border-top:1px solid rgba(255,255,255,.06);padding:50px 0 0}
.qcy9ws{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:40px}
.yzyf8p img{height:36px;margin-bottom:12px}
.yzyf8p p{color:var(--text-sub);font-size:.88rem;line-height:1.6}
.jnhaqj h4{font-size:1rem;font-weight:700;margin-bottom:14px;color:#fff}
.jnhaqj a{display:block;color:var(--text-sub);font-size:.88rem;padding:4px 0;transition:color .2s}
.jnhaqj a:hover{color:var(--accent)}
.wbba8wxh{border-top:1px solid rgba(255,255,255,.06);padding:20px 0;text-align:center;color:var(--text-sub);font-size:.82rem}

/* 面包屑 */
.ao2t9{background:var(--bg-card);padding:14px 0;border-bottom:1px solid rgba(255,255,255,.04)}
.zfod7v{display:flex;gap:8px;align-items:center;font-size:.85rem;color:var(--text-sub)}
.zfod7v a{color:var(--text-sub)}
.zfod7v a:hover{color:var(--accent)}
.zfod7v .cvk4ngtn{color:rgba(255,255,255,.2)}

/* 页面Hero */
.wx4ga{background:var(--bg-light);padding:50px 0;text-align:center}
.wx4ga h1{font-size:2rem;font-weight:800;margin-bottom:8px}
.wx4ga p{color:var(--text-sub);font-size:1rem}

/* SEO文章 */
.mww5e{max-width:900px;margin:0 auto;padding:40px 20px}
.mww5e h3,.mww5e h4,.mww5e h5,.mww5e h6{margin:20px 0 10px;font-weight:700}
.mww5e h3{font-size:1.3rem}
.mww5e h4{font-size:1.1rem}
.mww5e h5{font-size:1rem}
.mww5e h6{font-size:.92rem;color:var(--text-sub)}
.mww5e p{color:var(--text-sub);font-size:.92rem;line-height:1.8;margin-bottom:14px}

/* 响应式 */
@media(max-width:1024px){
.fwh88df{grid-template-columns:repeat(3,1fr)}
.qgs0j7{grid-template-columns:repeat(2,1fr)}
.qcy9ws{grid-template-columns:1fr 1fr}
.uc27w4e8{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
.ckw79i2g{height:56px}
.main-menu{display:none;position:fixed;top:56px;left:0;right:0;bottom:0;background:var(--bg-dark);flex-direction:column;padding:20px;gap:4px;z-index:999}
.main-menu.show{display:flex}
.menu-btn{display:block}
.veznk7x{height:400px}
.ebpekr h1{font-size:1.8rem}
.fwh88df{grid-template-columns:repeat(2,1fr)}
.pghw1zlj,.r23xy6r,.o4numit,.l8qbi{grid-template-columns:1fr}
.j4ebl5js{grid-template-columns:1fr}
.nw0vp{grid-template-columns:repeat(2,1fr)}
.qgs0j7{grid-template-columns:1fr}
.uc27w4e8{grid-template-columns:1fr}
.qcy9ws{grid-template-columns:1fr}
}
@media(max-width:480px){
.fwh88df{grid-template-columns:1fr}
.veznk7x{height:320px}
.ebpekr{padding:0 20px}
.ebpekr h1{font-size:1.5rem}
}

/* 动画 - 默认可见，JS增强时添加动画 */
.fade-up{opacity:1;transform:translateY(0);transition:all .6s ease}
.js-ready .fade-up{opacity:0;transform:translateY(30px)}
.js-ready .fade-up.show{opacity:1;transform:translateY(0)}

/* 懒加载占位 */
img[loading="lazy"]{background:var(--bg-light)}