/* ========================================
   四虎 修车改装视频社区 - 全站样式
   品牌色系：赛车红 #E63946 / 深海蓝 #1D3557 / 琥珀橙 #F4A261
   ======================================== */

/* === 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:#0D1117;color:#F1FAEE;line-height:1.7;overflow-x:hidden}
a{color:#F4A261;text-decoration:none;transition:color .3s}
a:hover{color:#E63946}
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:#F1FAEE}

/* === 容器 === */
.qnxfesl{max-width:1200px;margin:0 auto;padding:0 20px}

/* === 头部导航 === */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(13,17,23,.95);backdrop-filter:blur(10px);border-bottom:1px solid rgba(230,57,70,.3);transition:all .3s}
.lcpqhd{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;max-width:1200px;margin:0 auto}
.fcesit{display:flex;align-items:center;gap:10px}
.fcesit img{width:50px;height:50px}
.md0thqh{font-size:24px;font-weight:900;color:#E63946;letter-spacing:2px}
.md0thqh span{color:#F4A261}

.iueum1{display:flex;align-items:center;gap:0}
.iueum1 a{padding:12px 16px;font-size:14px;color:#F1FAEE;font-weight:500;position:relative;transition:all .3s}
.iueum1 a::after{content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:2px;background:#E63946;transition:width .3s}
.iueum1 a:hover,.iueum1 a.active{color:#E63946}
.iueum1 a:hover::after,.iueum1 a.active::after{width:70%}

.rx3i9uu{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:5px}
.rx3i9uu span{width:25px;height:2px;background:#F1FAEE;transition:all .3s}

/* === 搜索框 === */
.c9wup{background:#161B22;padding:15px 0;border-bottom:1px solid rgba(29,53,87,.5)}
.o5w1j6{max-width:600px;margin:0 auto;display:flex;gap:10px;padding:0 20px}
.o5w1j6 input{flex:1;padding:10px 18px;border:2px solid #1D3557;border-radius:25px;background:#0D1117;color:#F1FAEE;font-size:14px;outline:none;transition:border-color .3s}
.o5w1j6 input:focus{border-color:#E63946}
.o5w1j6 input::placeholder{color:#8B949E}
.o5w1j6 button{padding:10px 24px;background:linear-gradient(135deg,#E63946,#c62828);color:#fff;border:none;border-radius:25px;cursor:pointer;font-size:14px;font-weight:600;transition:transform .2s,box-shadow .3s}
.o5w1j6 button:hover{transform:scale(1.05);box-shadow:0 4px 15px rgba(230,57,70,.4)}

/* === Banner === */
.vwysd{position:relative;height:75vh;min-height:500px;overflow:hidden;margin-top:70px}
.vwysd img{width:100%;height:100%;object-fit:cover;filter:brightness(.5)}
.i7aem39l{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(13,17,23,.3) 0%,rgba(13,17,23,.8) 100%)}
.i7aem39l h1{font-size:48px;margin-bottom:15px;text-shadow:0 4px 20px rgba(0,0,0,.5)}
.i7aem39l h1 .idnsa8q{color:#E63946;font-size:64px}
.i7aem39l p{font-size:18px;max-width:700px;color:#ccc;margin-bottom:25px}
.pvejeq7{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.pvejeq7 span{padding:6px 16px;background:rgba(230,57,70,.2);border:1px solid rgba(230,57,70,.4);border-radius:20px;font-size:13px;color:#F4A261}

/* === 区块通用 === */
.pa8lxi{padding:60px 0}
.f18ovt{background:#0D1117}
.i39s43g{background:#161B22}
.tzfofb{text-align:center;margin-bottom:40px}
.tzfofb h2{font-size:32px;margin-bottom:10px;position:relative;display:inline-block}
.tzfofb h2 .l05z6{color:#E63946}
.tzfofb h2::after{content:"";display:block;width:60px;height:3px;background:linear-gradient(90deg,#E63946,#F4A261);margin:10px auto 0}
.tzfofb p{color:#8B949E;font-size:15px;max-width:600px;margin:0 auto}

/* === 视频卡片网格 === */
.jndyo{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.tq69c{background:#161B22;border-radius:12px;overflow:hidden;border:1px solid rgba(29,53,87,.4);transition:transform .3s,box-shadow .3s}
.tq69c:hover{transform:translateY(-5px);box-shadow:0 10px 30px rgba(230,57,70,.15)}
.woi6iu{position:relative;padding-top:56.25%;overflow:hidden}
.woi6iu img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.tq69c:hover .woi6iu img{transform:scale(1.05)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;background:rgba(230,57,70,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s,transform .3s}
.play-btn::after{content:"";border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:4px}
.tq69c:hover .play-btn{opacity:1;transform:translate(-50%,-50%) scale(1.1)}
.zw74ri{padding:15px}
.zw74ri h3{font-size:15px;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.eh7lu{display:flex;gap:12px;font-size:12px;color:#8B949E}
.eh7lu span{display:flex;align-items:center;gap:4px}
.mlzj7lu{display:inline-block;padding:2px 8px;background:rgba(244,162,97,.15);color:#F4A261;border-radius:10px;font-size:11px;margin-top:8px}

/* === 专家/团队卡片 === */
.dgk95{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.daxnv94{background:#161B22;border-radius:12px;padding:30px 20px;text-align:center;border:1px solid rgba(29,53,87,.4);transition:transform .3s,border-color .3s}
.daxnv94:hover{transform:translateY(-5px);border-color:#E63946}
.gkary{width:100px;height:100px;border-radius:50%;margin:0 auto 15px;overflow:hidden;border:3px solid #E63946}
.gkary img{width:100%;height:100%;object-fit:cover}
.daxnv94 h4{font-size:18px;margin-bottom:5px}
.daxnv94 .hs5gmen{color:#F4A261;font-size:13px;margin-bottom:10px}
.daxnv94 p{font-size:13px;color:#8B949E;margin-bottom:15px}
.daxnv94 .rm6u5{display:inline-block;padding:6px 18px;background:transparent;border:1px solid #E63946;color:#E63946;border-radius:20px;font-size:12px;transition:all .3s}
.daxnv94 .rm6u5:hover{background:#E63946;color:#fff}

/* === FAQ === */
.mnjsvru{max-width:800px;margin:0 auto}
.sveobjq{background:#161B22;border:1px solid rgba(29,53,87,.4);border-radius:10px;margin-bottom:12px;overflow:hidden}
.faq-q{padding:18px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:15px;transition:background .3s}
.faq-q:hover{background:rgba(230,57,70,.05)}
.faq-q::after{content:"+";font-size:20px;color:#E63946;transition:transform .3s}
.sveobjq.active .faq-q::after{transform:rotate(45deg)}
.i0r4x{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s;padding:0 20px}
.sveobjq.active .i0r4x{max-height:300px;padding:0 20px 18px}
.i0r4x p{font-size:14px;color:#8B949E;line-height:1.8}

/* === 用户评论 === */
.kumz83{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.zrt1san{background:#161B22;border-radius:12px;padding:24px;border:1px solid rgba(29,53,87,.4)}
.d1ervq{color:#F4A261;font-size:16px;margin-bottom:10px;letter-spacing:2px}
.zrt1san p{font-size:14px;color:#ccc;margin-bottom:15px;line-height:1.8;font-style:italic}
.z5ll0l{display:flex;align-items:center;gap:10px}
.z5ll0l .r3ix21{width:40px;height:40px;border-radius:50%;background:#1D3557;display:flex;align-items:center;justify-content:center;color:#F4A261;font-weight:700;font-size:16px}
.z5ll0l .ku7x6a77{font-size:14px;font-weight:600}
.z5ll0l .kj0em7b{font-size:12px;color:#8B949E}

/* === 合作品牌 === */
.xowhqf{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.xowhqf .tddr1ihc{width:120px;height:60px;background:#1D3557;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;color:#F1FAEE;opacity:.7;transition:opacity .3s,transform .3s}
.xowhqf .tddr1ihc:hover{opacity:1;transform:scale(1.05)}

/* === AI赋能 === */
.pqpi4y{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.ctnw80pa{background:#161B22;border-radius:12px;padding:30px;border:1px solid rgba(29,53,87,.4);text-align:center;transition:transform .3s,border-color .3s}
.ctnw80pa:hover{transform:translateY(-5px);border-color:#F4A261}
.ne0hie{font-size:40px;margin-bottom:15px}
.ctnw80pa h4{font-size:17px;margin-bottom:10px;color:#F4A261}
.ctnw80pa p{font-size:13px;color:#8B949E}

/* === 社区功能 === */
.kc5zlv{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:20px}
.m6ws21i{background:#161B22;border-radius:12px;padding:25px 15px;text-align:center;border:1px solid rgba(29,53,87,.4);transition:all .3s}
.m6ws21i:hover{border-color:#E63946;transform:translateY(-3px)}
.m6ws21i .n7qiyl{font-size:32px;margin-bottom:10px}
.m6ws21i h5{font-size:15px;margin-bottom:5px}
.m6ws21i p{font-size:12px;color:#8B949E}

/* === 按钮 === */
.sbkvqa{display:inline-block;padding:12px 30px;border-radius:25px;font-size:14px;font-weight:600;cursor:pointer;transition:all .3s;border:none}
.ulvtnmcn{background:linear-gradient(135deg,#E63946,#c62828);color:#fff}
.ulvtnmcn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(230,57,70,.4);color:#fff}
.vbzfi{background:transparent;border:2px solid #F4A261;color:#F4A261}
.vbzfi:hover{background:#F4A261;color:#0D1117}

/* === 页脚 === */
.wuvopmhj{background:#0a0d12;border-top:1px solid rgba(29,53,87,.5);padding:50px 0 20px}
.a44y169t{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:30px;margin-bottom:30px}
.qluqi0w h4{font-size:16px;margin-bottom:15px;color:#E63946;position:relative;padding-bottom:10px}
.qluqi0w h4::after{content:"";position:absolute;bottom:0;left:0;width:30px;height:2px;background:#F4A261}
.qluqi0w p,.qluqi0w li{font-size:13px;color:#8B949E;margin-bottom:8px}
.qluqi0w a{color:#8B949E;font-size:13px}
.qluqi0w a:hover{color:#F4A261}
.pl6caabf{display:flex;gap:20px;margin-top:10px}
.pl6caabf .dpitmxgn{text-align:center}
.pl6caabf .dpitmxgn img{width:100px;height:100px;border-radius:8px;margin-bottom:5px}
.pl6caabf .dpitmxgn span{font-size:11px;color:#8B949E}
.o5z0txz{text-align:center;padding-top:20px;border-top:1px solid rgba(29,53,87,.3);font-size:12px;color:#8B949E}
.o5z0txz .a45l9o{margin-top:5px;color:#F4A261}

/* === 社交分享 === */
.t9q01zf{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}
.bxf1e6p{padding:8px 18px;border-radius:20px;font-size:12px;font-weight:600;transition:all .3s;cursor:pointer}
.dmqc9{background:rgba(7,193,96,.15);color:#07C160;border:1px solid rgba(7,193,96,.3)}
.o7x9rq{background:rgba(230,57,70,.15);color:#E63946;border:1px solid rgba(230,57,70,.3)}
.iyinoc3{background:rgba(37,37,37,.5);color:#F1FAEE;border:1px solid rgba(241,250,238,.3)}
.lj1kuyz{background:rgba(0,174,236,.15);color:#00AEEC;border:1px solid rgba(0,174,236,.3)}
.bxf1e6p:hover{transform:translateY(-2px)}

/* === 面包屑 === */
.estncn2{padding:15px 0;font-size:13px;color:#8B949E}
.estncn2 a{color:#F4A261}
.estncn2 span{margin:0 8px;color:#555}

/* === 内页Banner === */
.rhm9wi{position:relative;height:300px;margin-top:70px;overflow:hidden}
.rhm9wi img{width:100%;height:100%;object-fit:cover;filter:brightness(.4)}
.rhm9wi .dafa3n9p{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center}
.rhm9wi h1{font-size:36px;margin-bottom:10px}
.rhm9wi p{color:#8B949E;font-size:15px}

/* === How-To指南 === */
.c5nhj{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:24px;counter-reset:step}
.usckl45y{background:#161B22;border-radius:12px;padding:30px 20px;border:1px solid rgba(29,53,87,.4);position:relative;counter-increment:step}
.usckl45y::before{content:counter(step);position:absolute;top:-15px;left:20px;width:35px;height:35px;background:#E63946;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px}
.usckl45y h4{margin-bottom:10px;margin-top:5px}
.usckl45y p{font-size:13px;color:#8B949E}

/* === 联系我们 === */
.eeqrel{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.qjlwovy{background:#161B22;border-radius:12px;padding:30px;border:1px solid rgba(29,53,87,.4);text-align:center}
.qjlwovy .n7qiyl{font-size:36px;margin-bottom:15px}
.qjlwovy h4{margin-bottom:10px;color:#F4A261}
.qjlwovy p{font-size:14px;color:#8B949E}

/* === 配件卡片 === */
.yqixao{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:24px}
.l5sgj2b{background:#161B22;border-radius:12px;overflow:hidden;border:1px solid rgba(29,53,87,.4);transition:transform .3s}
.l5sgj2b:hover{transform:translateY(-5px)}
.l5sgj2b .f5dgic{height:180px;overflow:hidden}
.l5sgj2b .f5dgic img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.l5sgj2b:hover .f5dgic img{transform:scale(1.05)}
.l5sgj2b .y1nwmjrz{padding:15px}
.l5sgj2b .y1nwmjrz h4{font-size:15px;margin-bottom:8px}
.l5sgj2b .y1nwmjrz .gw19o{color:#E63946;font-weight:700;font-size:18px}
.l5sgj2b .y1nwmjrz p{font-size:12px;color:#8B949E;margin-top:5px}

/* === 数据统计 === */
.gbw2e3n{display:flex;justify-content:center;gap:40px;flex-wrap:wrap;padding:30px 0}
.nsxbfmf{text-align:center}
.nsxbfmf .tja54c{font-size:36px;font-weight:900;color:#E63946;display:block}
.nsxbfmf .mg03cax2{font-size:13px;color:#8B949E;margin-top:5px}

/* === 创作中心 === */
.fo1b4{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.t5vw9ya0{background:#161B22;border-radius:12px;padding:30px;border:1px solid rgba(29,53,87,.4);display:flex;gap:20px;align-items:flex-start;transition:transform .3s}
.t5vw9ya0:hover{transform:translateY(-3px)}
.t5vw9ya0 .n7qiyl{font-size:36px;flex-shrink:0}
.t5vw9ya0 h4{font-size:16px;margin-bottom:8px;color:#F4A261}
.t5vw9ya0 p{font-size:13px;color:#8B949E}

/* === 响应式 === */
@media(max-width:768px){
  .iueum1{display:none;position:absolute;top:100%;left:0;width:100%;background:#0D1117;flex-direction:column;padding:10px 0;border-top:1px solid rgba(29,53,87,.5)}
  .iueum1.show{display:flex}
  .iueum1 a{padding:12px 20px;width:100%;text-align:left}
  .rx3i9uu{display:flex}
  .vwysd{height:50vh;min-height:350px}
  .i7aem39l h1{font-size:28px}
  .i7aem39l h1 .idnsa8q{font-size:40px}
  .i7aem39l p{font-size:14px}
  .tzfofb h2{font-size:24px}
  .jndyo{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
  .a44y169t{grid-template-columns:1fr}
  .gbw2e3n{gap:20px}
  .nsxbfmf .tja54c{font-size:28px}
  .rhm9wi{height:200px}
  .rhm9wi h1{font-size:24px}
  .lcpqhd{padding:8px 15px}
}

@media(max-width:480px){
  .jndyo{grid-template-columns:1fr}
  .dgk95{grid-template-columns:1fr}
  .vwysd{height:40vh;min-height:280px}
  .i7aem39l h1{font-size:22px}
  .i7aem39l h1 .idnsa8q{font-size:32px}
  .o5w1j6{flex-direction:column}
  .o5w1j6 button{width:100%}
}

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

/* === 图片加载 === */
.kj4pbfp9{opacity:1}

/* === 专家资质标签 === */
.dnc51ejo{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-bottom:10px}
.bnjowy{display:inline-block;padding:3px 10px;background:rgba(230,57,70,.12);border:1px solid rgba(230,57,70,.3);border-radius:12px;font-size:11px;color:#E63946}

/* === 视频时长标签 === */
.zvcb4b{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.8);color:#fff;padding:2px 8px;border-radius:4px;font-size:11px;font-weight:600;z-index:2}

/* === 视频描述 === */
.opccr2d{font-size:12px;color:#8B949E;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.6}

/* === 视频标签组 === */
.btyvydda{display:flex;flex-wrap:wrap;gap:4px;margin-top:6px}

/* === 内容块（隐私政策等） === */
.ai0phuk{line-height:1.9}
.ai0phuk h2{font-size:28px;margin-bottom:20px;color:#E63946}
.ai0phuk h3{font-size:20px;margin:30px 0 15px;color:#F4A261;border-left:3px solid #E63946;padding-left:12px}
.ai0phuk p{font-size:15px;color:#ccc;margin-bottom:12px}

/* === video元素隐藏（用poster做封面） === */
.woi6iu video{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;z-index:0;display:none}
.tq69c:hover .woi6iu video{display:block}

/* === 步骤编号 === */
.udso3{width:50px;height:50px;background:linear-gradient(135deg,#E63946,#c62828);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:900;color:#fff;margin:0 auto 15px}