/* ============================================
   91 修车改装视频社区 - 全站样式表
   品牌：91 | 域名：mhhnnttw.cn
   原创设计 - 赛车红+深夜蓝黑+机油金
   ============================================ */

/* --- CSS Reset & Base --- */
*,*::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:#0D0D1A;color:#E8E8F0;line-height:1.7;overflow-x:hidden}
a{color:#F5A623;text-decoration:none;transition:color .3s}
a:hover{color:#E8350F}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3;color:#fff}

/* --- Container --- */
.xohvn{max-width:1200px;margin:0 auto;padding:0 20px}
.lacehb{padding:60px 0}

/* --- Header / Navigation --- */
.sqyzht{background:rgba(13,13,26,.96);position:fixed;top:0;left:0;width:100%;z-index:1000;border-bottom:1px solid rgba(232,53,15,.2);backdrop-filter:blur(12px)}
.qp1v4f{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;max-width:1200px;margin:0 auto}
.twu1x{display:flex;align-items:center;gap:10px}
.twu1x img{height:42px;width:auto}
.xos0z{font-size:1.5rem;font-weight:800;color:#E8350F;letter-spacing:2px}
.ni6acd{display:flex;align-items:center;gap:0}
.ni6acd a{padding:10px 16px;font-size:.95rem;color:#B0B0C8;transition:all .3s;position:relative}
.ni6acd a:hover,.ni6acd a.active{color:#E8350F}
.ni6acd a::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:2px;background:#E8350F;transition:width .3s}
.ni6acd a:hover::after,.ni6acd a.active::after{width:60%}
.qbmboj{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* --- Search Bar --- */
.ikh7d85{background:rgba(22,22,42,.9);padding:12px 0;border-bottom:1px solid rgba(245,166,35,.1)}
.hzckbl{max-width:600px;margin:0 auto;display:flex;gap:8px;padding:0 20px}
.hzckbl input{flex:1;padding:10px 16px;border:1px solid rgba(245,166,35,.3);border-radius:25px;background:rgba(13,13,26,.8);color:#fff;font-size:.9rem;outline:none;transition:border-color .3s}
.hzckbl input:focus{border-color:#E8350F}
.hzckbl input::placeholder{color:#666}
.hzckbl button{padding:10px 24px;background:linear-gradient(135deg,#E8350F,#F5A623);border:none;border-radius:25px;color:#fff;font-size:.9rem;cursor:pointer;transition:transform .2s,box-shadow .3s}
.hzckbl button:hover{transform:scale(1.05);box-shadow:0 4px 15px rgba(232,53,15,.4)}

/* --- Hero Banner --- */
.k1th63{position:relative;height:70vh;min-height:480px;overflow:hidden;margin-top:68px;display:flex;align-items:center;justify-content:center}
.k1th63 .sx9jhfp{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.45)}
.k1th63 .mt58v0{position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,13,26,.3) 0%,rgba(13,13,26,.85) 100%)}
.w0ho0{position:relative;z-index:2;text-align:center;padding:0 20px;max-width:800px}
.w0ho0 h1{font-size:2.8rem;margin-bottom:16px;text-shadow:0 2px 20px rgba(0,0,0,.5)}
.w0ho0 h1 .tx6dlr{color:#E8350F;font-size:3.2rem}
.w0ho0 p{font-size:1.15rem;color:#ccc;margin-bottom:24px;line-height:1.8}
.w0ho0 .tm0ml{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:20px}
.w0ho0 .tm0ml span{padding:6px 16px;background:rgba(232,53,15,.15);border:1px solid rgba(232,53,15,.3);border-radius:20px;font-size:.85rem;color:#F5A623}
.cygbjob{display:inline-flex;gap:16px;flex-wrap:wrap;justify-content:center}
.dzxhc3{padding:12px 32px;background:linear-gradient(135deg,#E8350F,#c42a0a);border:none;border-radius:30px;color:#fff;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s;text-decoration:none;display:inline-block}
.dzxhc3:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(232,53,15,.5);color:#fff}
.gk4a9a{padding:12px 32px;background:transparent;border:2px solid #F5A623;border-radius:30px;color:#F5A623;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s;text-decoration:none;display:inline-block}
.gk4a9a:hover{background:#F5A623;color:#0D0D1A;transform:translateY(-2px)}

/* --- Section Titles --- */
.cfh6dkw{text-align:center;margin-bottom:40px}
.cfh6dkw h2{font-size:2rem;margin-bottom:10px;position:relative;display:inline-block}
.cfh6dkw h2::after{content:'';display:block;width:60px;height:3px;background:linear-gradient(90deg,#E8350F,#F5A623);margin:10px auto 0}
.cfh6dkw p{color:#888;font-size:1rem;margin-top:8px}

/* --- Video Card Grid --- */
.qaae9z{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px}
.qoi9x{background:#16162A;border-radius:12px;overflow:hidden;transition:transform .3s,box-shadow .3s;cursor:pointer;position:relative}
.qoi9x:hover{transform:translateY(-6px);box-shadow:0 12px 30px rgba(232,53,15,.2)}
.qoi9x .alq65lt{position:relative;padding-top:56.25%;overflow:hidden}
.qoi9x .alq65lt img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.qoi9x:hover .alq65lt img{transform:scale(1.08)}
.qoi9x .to7wr{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:56px;height:56px;background:rgba(232,53,15,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s,transform .3s}
.qoi9x:hover .to7wr{opacity:1;transform:translate(-50%,-50%) scale(1.1)}
.to7wr::after{content:'';display:block;width:0;height:0;border-left:18px solid #fff;border-top:11px solid transparent;border-bottom:11px solid transparent;margin-left:4px}
.qoi9x .cdrqgak{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.8);padding:2px 8px;border-radius:4px;font-size:.75rem;color:#fff}
.qoi9x .v91s53{padding:16px}
.qoi9x .v91s53 h3{font-size:1rem;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.4}
.qoi9x .j61l2{display:flex;justify-content:space-between;align-items:center;font-size:.8rem;color:#888}
.qoi9x .j61l2 .views{display:flex;align-items:center;gap:4px}
.qoi9x .niouw6{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.qoi9x .niouw6 span{padding:3px 10px;background:rgba(245,166,35,.1);border-radius:12px;font-size:.75rem;color:#F5A623}

/* --- Feature Modules --- */
.q732l{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.xujwpoa{background:#16162A;border-radius:12px;padding:30px 24px;text-align:center;transition:transform .3s,border-color .3s;border:1px solid rgba(245,166,35,.1)}
.xujwpoa:hover{transform:translateY(-4px);border-color:#E8350F}
.xujwpoa .icon{font-size:2.5rem;margin-bottom:16px;display:block}
.xujwpoa h3{font-size:1.1rem;margin-bottom:10px;color:#F5A623}
.xujwpoa p{font-size:.9rem;color:#999;line-height:1.6}

/* --- Expert Cards --- */
.mi25p{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.nejq8v{background:#16162A;border-radius:12px;overflow:hidden;text-align:center;transition:transform .3s;border:1px solid rgba(245,166,35,.08)}
.nejq8v:hover{transform:translateY(-4px)}
.nejq8v .zeu4o{width:120px;height:120px;border-radius:50%;margin:24px auto 16px;object-fit:cover;border:3px solid #E8350F}
.nejq8v h3{font-size:1.05rem;margin-bottom:4px}
.nejq8v .role{color:#F5A623;font-size:.85rem;margin-bottom:12px}
.nejq8v p{font-size:.85rem;color:#999;padding:0 20px;line-height:1.5}
.nejq8v .o1bx5{padding:16px 20px;display:flex;gap:10px;justify-content:center}
.nejq8v .o1bx5 a{padding:6px 16px;border-radius:20px;font-size:.8rem;border:1px solid #E8350F;color:#E8350F;transition:all .3s}
.nejq8v .o1bx5 a:hover{background:#E8350F;color:#fff}

/* --- FAQ Section --- */
.c7mpc1fq{max-width:800px;margin:0 auto}
.byjok{background:#16162A;border-radius:10px;margin-bottom:12px;overflow:hidden;border:1px solid rgba(245,166,35,.08)}
.byjok .knfm08a2{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:1rem;transition:background .3s}
.byjok .knfm08a2:hover{background:rgba(232,53,15,.05)}
.byjok .knfm08a2 .arrow{transition:transform .3s;color:#F5A623;font-size:1.2rem}
.faq-item.open .knfm08a2 .arrow{transform:rotate(180deg)}
.byjok .kj9drshy{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .3s;padding:0 24px}
.faq-item.open .kj9drshy{max-height:300px;padding:0 24px 18px}
.byjok .kj9drshy p{color:#999;font-size:.9rem;line-height:1.7}

/* --- Reviews / Testimonials --- */
.joa5c9{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.xqo8o4ce{background:#16162A;border-radius:12px;padding:24px;border:1px solid rgba(245,166,35,.08)}
.xqo8o4ce .stars{color:#F5A623;font-size:1rem;margin-bottom:10px;letter-spacing:2px}
.xqo8o4ce p{font-size:.9rem;color:#ccc;line-height:1.6;margin-bottom:12px;font-style:italic}
.xqo8o4ce .neosu9{display:flex;align-items:center;gap:10px}
.xqo8o4ce .neosu9 .avatar{width:36px;height:36px;border-radius:50%;background:#E8350F;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.85rem}
.xqo8o4ce .neosu9 .name{font-size:.85rem;color:#F5A623}
.xqo8o4ce .neosu9 .date{font-size:.75rem;color:#666}

/* --- Partners Logo Wall --- */
.osvwkkh{background:#0a0a18}
.y7d9t9c{border-radius:12px;overflow:hidden;max-width:900px;margin:0 auto}

/* --- Community Guide --- */
.okahn67{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:24px;counter-reset:step}
.tkkhwn{background:#16162A;border-radius:12px;padding:30px 24px;position:relative;border:1px solid rgba(245,166,35,.08);counter-increment:step}
.tkkhwn::before{content:counter(step);position:absolute;top:-12px;left:24px;width:32px;height:32px;background:linear-gradient(135deg,#E8350F,#F5A623);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;color:#fff}
.tkkhwn h3{margin-top:8px;font-size:1rem;margin-bottom:8px;color:#F5A623}
.tkkhwn p{font-size:.85rem;color:#999;line-height:1.6}

/* --- Contact Section --- */
.wciaos{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.bbf8i0{background:#16162A;border-radius:12px;padding:30px;border:1px solid rgba(245,166,35,.08)}
.bbf8i0 h3{font-size:1.1rem;margin-bottom:16px;color:#F5A623}
.bbf8i0 .h2foy{display:flex;align-items:center;gap:10px;margin-bottom:12px;font-size:.9rem;color:#ccc}
.bbf8i0 .h2foy .label{color:#888;min-width:70px}

/* --- Share Buttons --- */
.ov8zc7el{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;padding:20px 0}
.eszzyu9u{padding:8px 20px;border-radius:25px;font-size:.85rem;border:1px solid rgba(245,166,35,.3);color:#ccc;cursor:pointer;transition:all .3s;background:transparent}
.eszzyu9u:hover{background:#E8350F;border-color:#E8350F;color:#fff}

/* --- Footer --- */
.q8fyz{background:#08081A;border-top:1px solid rgba(232,53,15,.15);padding:40px 0 20px}
.l6qlj{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:30px;margin-bottom:30px}
.h2guj h4{font-size:1rem;margin-bottom:16px;color:#F5A623;position:relative;padding-bottom:8px}
.h2guj h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:#E8350F}
.h2guj p,.h2guj a{font-size:.85rem;color:#888;display:block;margin-bottom:8px;transition:color .3s}
.h2guj a:hover{color:#E8350F}
.h2guj .ukqetlv{width:120px;border-radius:8px;margin-top:8px}
.bl1p3{text-align:center;padding-top:20px;border-top:1px solid rgba(255,255,255,.05);font-size:.8rem;color:#555}
.bl1p3 .qxvvmz5h{color:#888;margin-top:6px}

/* --- Breadcrumb --- */
.hk9t9r{padding:16px 0;font-size:.85rem;color:#888}
.hk9t9r a{color:#F5A623}
.hk9t9r span{margin:0 8px;color:#555}

/* --- Inner Page Hero --- */
.k08rwtz{margin-top:68px;padding:60px 0 40px;background:linear-gradient(135deg,#0D0D1A 0%,#16162A 100%);text-align:center}
.k08rwtz h1{font-size:2.2rem;margin-bottom:10px}
.k08rwtz p{color:#888;font-size:1rem}

/* --- AI Module --- */
.utorz8u{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center}
.utorz8u img{border-radius:12px}
.utorz8u .ocdt5 h3{font-size:1.3rem;margin-bottom:12px;color:#F5A623}
.utorz8u .ocdt5 p{color:#999;font-size:.95rem;line-height:1.7;margin-bottom:12px}

/* --- Lazy Load Placeholder --- */
.lazy{opacity:0;transition:opacity .5s}
.lazy.loaded{opacity:1}

/* --- Responsive --- */
@media(max-width:768px){
  .qp1v4f{flex-wrap:wrap}
  .ni6acd{display:none;flex-direction:column;width:100%;padding:10px 0}
  .main-nav.open{display:flex}
  .qbmboj{display:block}
  .k1th63{height:55vh;min-height:360px}
  .w0ho0 h1{font-size:1.8rem}
  .w0ho0 h1 .tx6dlr{font-size:2rem}
  .qaae9z{grid-template-columns:1fr}
  .q732l{grid-template-columns:1fr 1fr}
  .mi25p{grid-template-columns:1fr 1fr}
  .utorz8u{grid-template-columns:1fr}
  .lacehb{padding:40px 0}
  .l6qlj{grid-template-columns:1fr 1fr}
  .hzckbl{flex-direction:column}
  .hzckbl button{width:100%}
}
@media(max-width:480px){
  .q732l{grid-template-columns:1fr}
  .mi25p{grid-template-columns:1fr}
  .l6qlj{grid-template-columns:1fr}
  .joa5c9{grid-template-columns:1fr}
  .okahn67{grid-template-columns:1fr}
  .wciaos{grid-template-columns:1fr}
}

/* --- Scrollbar --- */
::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-track{background:#0D0D1A}
::-webkit-scrollbar-thumb{background:#E8350F;border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:#F5A623}

/* --- Animation --- */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.mravexj9{animation:fadeInUp .6s ease forwards}

/* --- MCP Frontend Placeholder --- */
.lald9u{background:#16162A;border-radius:12px;padding:24px;border:1px solid rgba(245,166,35,.1);text-align:center;margin:20px 0}
.lald9u h4{color:#F5A623;margin-bottom:10px}
.lald9u .m60kwv{display:inline-block;padding:6px 16px;background:rgba(232,53,15,.1);border-radius:20px;font-size:.85rem;color:#E8350F}

/* --- H5 Video Player in Cards --- */
.qoi9x .alq65lt video.nt914cj8{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0;display:none}
.qoi9x .alq65lt .qcurew5{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1;transition:transform .4s}
.qoi9x:hover .alq65lt .qcurew5{transform:scale(1.08)}
.qoi9x .alq65lt .to7wr{z-index:3}
.qoi9x .alq65lt .cdrqgak{z-index:2}

/* --- Footer Logo --- */
.wopw9xu{text-align:center;margin-bottom:30px;padding-bottom:20px;border-bottom:1px solid rgba(245,166,35,.1)}
.wopw9xu a{display:inline-block;text-decoration:none}
.wopw9xu img{display:inline-block;margin:0 auto 8px}
.jiwfr{text-align:center;padding:16px 0;border-top:1px solid rgba(255,255,255,.05);margin-top:20px;font-size:.8rem}
.jiwfr a{color:#888;margin:0 12px;transition:color .3s}
.jiwfr a:hover{color:#E8350F}