/* ============================================
   四虎视频 修车改装视频社区 - 原创样式表
   配色方案：深邃夜蓝 + 活力红 + 机油金
   域名：dfkLe.cn
   ============================================ */

/* CSS Reset & Base */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#1A1A2E;
  --secondary:#E94560;
  --accent:#F5A623;
  --bg-dark:#0F0F1A;
  --text-light:#EAEAEA;
  --text-muted:#A0A0B8;
  --card-bg:#16213E;
  --card-hover:#1C2A4A;
  --border-color:#2A2A4A;
  --gradient-start:#1A1A2E;
  --gradient-end:#0F0F1A;
  --shadow:0 4px 24px rgba(0,0,0,0.4);
  --radius:12px;
  --transition:all 0.3s ease;
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;background:var(--bg-dark);color:var(--text-light);line-height:1.8;overflow-x:hidden}
a{color:var(--secondary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--accent)}
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 */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:60px 0}
.cd0y7x{font-size:2rem;text-align:center;margin-bottom:40px;position:relative;padding-bottom:15px}
.cd0y7x::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:80px;height:3px;background:linear-gradient(90deg,var(--secondary),var(--accent))}
.c5j76igo5{text-align:center;color:var(--text-muted);margin-bottom:30px;font-size:1.05rem}

/* Header & Navigation */
.cpwejot4{background:rgba(15,15,26,0.95);backdrop-filter:blur(12px);position:fixed;top:0;left:0;width:100%;z-index:1000;border-bottom:1px solid var(--border-color);transition:var(--transition)}
.site-header.scrolled{background:rgba(15,15,26,0.98);box-shadow:0 2px 20px rgba(0,0,0,0.5)}
.ce88q5{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;max-width:1200px;margin:0 auto}
.logo{display:flex;align-items:center;gap:10px}
.logo img{height:42px;width:auto}
.c6knbh{font-size:1.5rem;font-weight:800;color:#fff;letter-spacing:1px}
.c6knbh span{color:var(--secondary)}
.czz8vfzr{display:flex;align-items:center;gap:28px}
.czz8vfzr a{color:var(--text-light);font-size:0.95rem;font-weight:500;position:relative;padding:4px 0}
.czz8vfzr a::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:var(--secondary);transition:var(--transition)}
.czz8vfzr a:hover::after,.czz8vfzr a.active::after{width:100%}
.czz8vfzr a:hover{color:var(--secondary)}
.cmi6o9gm{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:5px}
.cmi6o9gm span{width:24px;height:2px;background:var(--text-light);transition:var(--transition)}

/* Search Bar */
.cav85h{background:var(--primary);border-bottom:1px solid var(--border-color);padding:10px 0;margin-top:68px}
.cav85h .container{display:flex;align-items:center;justify-content:center}
.cp8qaz082{display:flex;align-items:center;max-width:600px;width:100%;background:var(--card-bg);border-radius:50px;overflow:hidden;border:1px solid var(--border-color)}
.cp8qaz082 input{flex:1;padding:10px 20px;background:transparent;border:none;color:var(--text-light);font-size:0.95rem;outline:none}
.cp8qaz082 input::placeholder{color:var(--text-muted)}
.cp8qaz082 button{padding:10px 24px;background:var(--secondary);color:#fff;border:none;cursor:pointer;font-size:0.9rem;transition:var(--transition)}
.cp8qaz082 button:hover{background:#d63a52}

/* Hero Banner */
.ccu72es59{position:relative;height:85vh;min-height:500px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.ccu72es59 .c6ow1b{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;filter:brightness(0.4)}
.cqqhd1mz{position:relative;z-index:2;text-align:center;padding:0 20px;max-width:800px}
.cqqhd1mz h1{font-size:3rem;margin-bottom:16px;text-shadow:0 2px 20px rgba(0,0,0,0.6)}
.cqqhd1mz h1 span{color:var(--secondary)}
.cqqhd1mz p{font-size:1.15rem;color:var(--text-muted);margin-bottom:30px;line-height:1.8}
.ch7nir{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 32px;border-radius:50px;font-weight:600;font-size:0.95rem;transition:var(--transition);cursor:pointer;border:none}
.btn-primary{background:var(--secondary);color:#fff}
.btn-primary:hover{background:#d63a52;transform:translateY(-2px);box-shadow:0 6px 20px rgba(233,69,96,0.4);color:#fff}
.btn-outline{background:transparent;color:#fff;border:2px solid var(--accent)}
.btn-outline:hover{background:var(--accent);color:var(--bg-dark);transform:translateY(-2px)}

/* Video Card Grid */
.cqql73kw{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:24px}
.c56j1s9{background:var(--card-bg);border-radius:var(--radius);overflow:hidden;transition:var(--transition);border:1px solid var(--border-color);position:relative}
.c56j1s9:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--secondary)}
.cg11oxzf{position:relative;padding-top:56.25%;overflow:hidden;background:#111}
.cg11oxzf img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:var(--transition)}
.c56j1s9:hover .cg11oxzf img{transform:scale(1.05)}
.cqtkfbj{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;background:rgba(233,69,96,0.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:var(--transition);cursor:pointer}
.cqtkfbj::after{content:'';width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:4px}
.c56j1s9:hover .cqtkfbj{opacity:1}
.cbcjtanl{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,0.8);color:#fff;padding:2px 8px;border-radius:4px;font-size:0.8rem}
.cz01jhfpf{padding:16px}
.cz01jhfpf h3{font-size:1.05rem;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cols3v4{display:flex;align-items:center;gap:12px;color:var(--text-muted);font-size:0.85rem}
.cols3v4 span{display:flex;align-items:center;gap:4px}
.cqm00is2{display:flex;gap:6px;margin-top:10px;flex-wrap:wrap}
.cqm00is2 span{background:rgba(233,69,96,0.15);color:var(--secondary);padding:2px 10px;border-radius:20px;font-size:0.78rem}

/* Feature Cards */
.cvvkfvu{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.cpac6v9{background:var(--card-bg);border-radius:var(--radius);padding:30px;text-align:center;transition:var(--transition);border:1px solid var(--border-color)}
.cpac6v9:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:var(--shadow)}
.cubpp1o3{width:64px;height:64px;margin:0 auto 16px;background:linear-gradient(135deg,var(--secondary),var(--accent));border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.8rem}
.cpac6v9 h3{font-size:1.15rem;margin-bottom:10px}
.cpac6v9 p{color:var(--text-muted);font-size:0.92rem}

/* Team Section */
.cwi7o1u42{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:28px}
.cqtix2w{background:var(--card-bg);border-radius:var(--radius);overflow:hidden;text-align:center;transition:var(--transition);border:1px solid var(--border-color)}
.cqtix2w:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.c8tywpxa{width:100%;height:300px;object-fit:cover}
.cu5llbhd{padding:20px}
.cu5llbhd h4{font-size:1.1rem;margin-bottom:4px}
.cspijp9{color:var(--secondary);font-size:0.88rem;margin-bottom:8px}
.cjy90i1ml{color:var(--text-muted);font-size:0.88rem;margin-bottom:12px}
.czoycteo{display:flex;gap:10px;justify-content:center}
.czoycteo a{padding:6px 16px;border:1px solid var(--border-color);border-radius:20px;font-size:0.82rem;color:var(--text-light);transition:var(--transition)}
.czoycteo a:hover{border-color:var(--secondary);color:var(--secondary)}

/* FAQ Section */
.cc6nfy4{max-width:800px;margin:0 auto}
.cwxzx6x{background:var(--card-bg);border-radius:var(--radius);margin-bottom:12px;border:1px solid var(--border-color);overflow:hidden}
.cjjyp799{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;transition:var(--transition)}
.cjjyp799:hover{color:var(--secondary)}
.cjjyp799::after{content:'+';font-size:1.4rem;color:var(--secondary);transition:var(--transition)}
.faq-item.active .cjjyp799::after{content:'-';transform:rotate(180deg)}
.cs8vokka{padding:0 24px;max-height:0;overflow:hidden;transition:max-height 0.3s ease;color:var(--text-muted);line-height:1.8}
.faq-item.active .cs8vokka{max-height:300px;padding-bottom:18px}

/* Reviews Section */
.c25972{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.ch2r1r6b{background:var(--card-bg);border-radius:var(--radius);padding:24px;border:1px solid var(--border-color);transition:var(--transition)}
.ch2r1r6b:hover{border-color:var(--accent)}
.chk2g1k{color:var(--accent);font-size:1rem;margin-bottom:10px;letter-spacing:2px}
.cpz2jgl{color:var(--text-muted);font-size:0.92rem;margin-bottom:14px;font-style:italic;line-height:1.7}
.cq0owy49{display:flex;align-items:center;gap:10px}
.co22p2cs{width:40px;height:40px;border-radius:50%;background:var(--secondary);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1rem}
.c4cv5ae4{font-weight:600;font-size:0.92rem}
.c3rulq24n{color:var(--text-muted);font-size:0.8rem}

/* Partners Logo Wall */
.cvfov39i{display:flex;flex-wrap:wrap;gap:24px;justify-content:center;align-items:center}
.cbmjlu9{background:var(--card-bg);border-radius:var(--radius);padding:20px 30px;border:1px solid var(--border-color);transition:var(--transition);min-width:150px;text-align:center;font-weight:700;font-size:1.1rem;color:var(--text-muted)}
.cbmjlu9:hover{border-color:var(--accent);color:var(--accent);transform:scale(1.05)}

/* How-To Guide */
.ctjzwhrrf{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:24px;counter-reset:step}
.cqdgeoo{background:var(--card-bg);border-radius:var(--radius);padding:30px;border:1px solid var(--border-color);position:relative;counter-increment:step}
.cqdgeoo::before{content:counter(step);position:absolute;top:-12px;left:20px;width:36px;height:36px;background:var(--secondary);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1rem;color:#fff}
.cqdgeoo h4{margin-bottom:8px;margin-top:8px}
.cqdgeoo p{color:var(--text-muted);font-size:0.9rem}

/* Contact Section */
.cn1li1xr{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:28px}
.ckauua{background:var(--card-bg);border-radius:var(--radius);padding:28px;border:1px solid var(--border-color)}
.ckauua h4{margin-bottom:14px;color:var(--accent)}
.che6w4c0{display:flex;align-items:center;gap:10px;margin-bottom:10px;color:var(--text-muted);font-size:0.92rem}
.che6w4c0 strong{color:var(--text-light);min-width:70px}

/* Share Buttons */
.cpxjvwne{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.cjyfju{padding:8px 20px;border-radius:50px;font-size:0.88rem;font-weight:600;transition:var(--transition);cursor:pointer;border:none;color:#fff}
.c69hm8{background:#07C160}
.cn9g091z3{background:#E6162D}
.c40j0as{background:#161823}
.cuiiqytc{background:#00A1D6}
.cjyfju:hover{transform:translateY(-2px);opacity:0.9}

/* Footer */
.cy7g837{background:var(--primary);border-top:1px solid var(--border-color);padding:40px 0 20px}
.cmpk1i{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:30px;margin-bottom:30px}
.c15j7pw h4{font-size:1rem;margin-bottom:14px;color:var(--accent)}
.c15j7pw p,.c15j7pw a{color:var(--text-muted);font-size:0.88rem;display:block;margin-bottom:6px}
.c15j7pw a:hover{color:var(--secondary)}
.cvacvko{display:flex;gap:20px;justify-content:center;margin:20px 0}
.cvacvko img{width:120px;height:120px;border-radius:8px;border:2px solid var(--border-color)}
.clkuufq{text-align:center;padding-top:20px;border-top:1px solid var(--border-color);color:var(--text-muted);font-size:0.85rem}
.clkuufq a{color:var(--secondary)}

/* Breadcrumb */
.breadcrumb{padding:12px 0;font-size:0.88rem;color:var(--text-muted)}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--secondary)}
.breadcrumb span{margin:0 6px;color:var(--border-color)}

/* Page Header */
.c02p67s5n{position:relative;height:300px;display:flex;align-items:center;justify-content:center;overflow:hidden;margin-top:68px}
.c02p67s5n .c6ow1b{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;filter:brightness(0.3)}
.crgdljd{position:relative;z-index:2;text-align:center}
.crgdljd h1{font-size:2.4rem;margin-bottom:8px}
.crgdljd p{color:var(--text-muted)}

/* Community Cards */
.cwtdn37r{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.cjtuynt1{background:var(--card-bg);border-radius:var(--radius);padding:24px;border:1px solid var(--border-color);transition:var(--transition)}
.cjtuynt1:hover{border-color:var(--secondary);transform:translateY(-3px)}
.cjtuynt1 h3{margin-bottom:10px}
.cjtuynt1 p{color:var(--text-muted);font-size:0.92rem;margin-bottom:12px}
.ckyhl4ot{display:flex;gap:16px;color:var(--text-muted);font-size:0.85rem}
.ckyhl4ot span{color:var(--accent);font-weight:700}

/* AI Feature Section */
.cc1w7j{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:24px}
.cgaae45{background:linear-gradient(135deg,var(--card-bg),rgba(22,33,62,0.8));border-radius:var(--radius);padding:28px;border:1px solid var(--border-color);transition:var(--transition)}
.cgaae45:hover{border-color:var(--accent);box-shadow:0 0 30px rgba(245,166,35,0.1)}
.cgaae45 h3{color:var(--accent);margin-bottom:10px}
.cgaae45 p{color:var(--text-muted);font-size:0.92rem}

/* MCP Frontend Placeholder */
.cxe80v{background:var(--card-bg);border-radius:var(--radius);padding:30px;border:1px solid var(--border-color);text-align:center;margin:20px 0}
.cxe80v h4{color:var(--accent);margin-bottom:10px}
.cxe80v p{color:var(--text-muted);font-size:0.9rem}
.c3u432ma{display:inline-block;padding:6px 16px;background:rgba(7,193,96,0.15);color:#07C160;border-radius:20px;font-size:0.85rem;margin-top:10px}

/* Lazy Load Placeholder */
.lazy{opacity:0;transition:opacity 0.5s ease}
.lazy.loaded{opacity:1}

/* Scroll to Top */
.cxfefes8{position:fixed;bottom:30px;right:30px;width:44px;height:44px;background:var(--secondary);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;visibility:hidden;transition:var(--transition);z-index:999;border:none;color:#fff;font-size:1.2rem}
.scroll-top.visible{opacity:1;visibility:visible}
.cxfefes8:hover{background:var(--accent);transform:translateY(-3px)}

/* Responsive */
@media(max-width:768px){
  .czz8vfzr{display:none;position:absolute;top:100%;left:0;width:100%;background:var(--primary);flex-direction:column;padding:20px;gap:16px;border-top:1px solid var(--border-color)}
  .nav-menu.open{display:flex}
  .cmi6o9gm{display:flex}
  .ccu72es59{height:60vh;min-height:400px}
  .cqqhd1mz h1{font-size:2rem}
  .cd0y7x{font-size:1.6rem}
  .cqql73kw{grid-template-columns:1fr}
  .cvvkfvu{grid-template-columns:1fr}
  .cwi7o1u42{grid-template-columns:1fr}
  .c25972{grid-template-columns:1fr}
  .cmpk1i{grid-template-columns:1fr}
  .cn1li1xr{grid-template-columns:1fr}
  .cav85h{margin-top:60px}
  .ce88q5{padding:10px 16px}
  .section{padding:40px 0}
  .ch7nir{flex-direction:column;align-items:center}
}
@media(max-width:480px){
  html{font-size:14px}
  .cqqhd1mz h1{font-size:1.6rem}
  .container{padding:0 12px}
}

/* Animation */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.cc91v3{animation:fadeInUp 0.6s ease forwards}

/* Tag Cloud */
.crnjhx3d{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.crnjhx3d a{background:var(--card-bg);color:var(--text-muted);padding:6px 16px;border-radius:20px;font-size:0.85rem;border:1px solid var(--border-color);transition:var(--transition)}
.crnjhx3d a:hover{border-color:var(--secondary);color:var(--secondary);background:rgba(233,69,96,0.1)}

/* Stats Bar */
.c895sl{display:flex;justify-content:center;gap:40px;flex-wrap:wrap;padding:30px 0}
.ctmpjbgh{text-align:center}
.c6nwyxxkl{font-size:2.2rem;font-weight:800;color:var(--secondary);display:block}
.csy1axl{color:var(--text-muted);font-size:0.9rem}

/* Gallery Grid */
.cmsdadx3{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.cz8n621{border-radius:var(--radius);overflow:hidden;position:relative;cursor:pointer}
.cz8n621 img{width:100%;height:220px;object-fit:cover;transition:var(--transition)}
.cz8n621:hover img{transform:scale(1.08)}
.cu2yfnp6{position:absolute;bottom:0;left:0;width:100%;padding:12px;background:linear-gradient(transparent,rgba(0,0,0,0.8));color:#fff;font-size:0.9rem}

/* Video Player Overlay */
.cj7axkiou{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.85);z-index:9999;display:flex;align-items:center;justify-content:center;cursor:pointer}
.cng666{background:var(--card-bg);border-radius:var(--radius);overflow:hidden;width:90%;max-width:800px;cursor:default;box-shadow:0 10px 60px rgba(0,0,0,0.6)}
.c5uaeb{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;background:var(--primary);border-bottom:1px solid var(--border-color)}
.c5uaeb span{color:var(--text-muted);font-size:0.9rem}
.ca4tkzu{background:none;border:none;color:var(--text-light);font-size:1.6rem;cursor:pointer;padding:0 4px;transition:var(--transition)}
.ca4tkzu:hover{color:var(--secondary)}
.ce0g7p4d{position:relative;width:100%;padding-top:56.25%;background:#000}
.ce0g7p4d img{position:absolute;top:0;left:0;width:100%;height:100%}
.cz64jcx1c{position:absolute;bottom:16px;left:16px;display:flex;align-items:center;gap:10px;color:#fff;font-size:0.9rem}
.cqj17cu9b{width:12px;height:12px;background:var(--secondary);border-radius:50%;animation:pulse 1.5s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(233,69,96,0.6)}70%{box-shadow:0 0 0 12px rgba(233,69,96,0)}100%{box-shadow:0 0 0 0 rgba(233,69,96,0)}}
.c4566v2{padding:10px 16px;background:var(--primary)}
.caliw3drw{width:100%;height:4px;background:var(--border-color);border-radius:2px;margin-bottom:8px;overflow:hidden}
.cuzxw7j4{width:0;height:100%;background:linear-gradient(90deg,var(--secondary),var(--accent));border-radius:2px}
.c2gr5o1p6{display:flex;justify-content:space-between;align-items:center;color:var(--text-muted);font-size:0.85rem}
.cwwty2ibm{cursor:pointer;font-size:1.1rem}

/* FAQ open state (JS uses .open class) */
.faq-item.open .cjjyp799::after{content:'-';transform:rotate(180deg)}
.faq-item.open .cs8vokka{max-height:300px;padding-bottom:18px}

/* Play button active state */
.play-btn.active{opacity:1!important;transform:translate(-50%,-50%) scale(1.1)}