/* ============================================
   四虎 修车改装视频社区 - 全站样式表
   品牌色: #C41E3A (深红) #1A1A2E (深蓝黑) #E8E8E8 (浅灰)
   ============================================ */

/* Reset & Base */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:#222;background:#0D0D14;line-height:1.7;overflow-x:hidden}
a{color:#C41E3A;text-decoration:none;transition:color .3s}
a:hover{color:#E8453A}
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 */
.bkm2klb{max-width:1200px;margin:0 auto;padding:0 20px}
.eogwah{padding:60px 0}

/* ============ Header & Navigation ============ */
.mikg07wj{background:#0D0D14;position:sticky;top:0;z-index:1000;border-bottom:1px solid rgba(196,30,58,.3);backdrop-filter:blur(10px)}
.ndi6nyhe{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;max-width:1200px;margin:0 auto}
.e6epk{display:flex;align-items:center;gap:10px}
.e6epk img{height:48px;width:auto}
.fm6ng{font-size:1.5rem;font-weight:900;color:#C41E3A;letter-spacing:2px}
.dq4ru1m2{display:flex;align-items:center;gap:0}
.dq4ru1m2 a{color:#ccc;padding:10px 16px;font-size:.95rem;transition:all .3s;position:relative}
.dq4ru1m2 a:hover,.dq4ru1m2 a.active{color:#C41E3A}
.dq4ru1m2 a::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:2px;background:#C41E3A;transition:width .3s}
.dq4ru1m2 a:hover::after,.dq4ru1m2 a.active::after{width:60%}
.yf4pxsz{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* Search Bar */
.j3aq2{background:#12121E;padding:10px 0;border-bottom:1px solid #1e1e30}
.j3aq2 .bkm2klb{display:flex;justify-content:center}
.gnsgq{display:flex;max-width:560px;width:100%}
.gnsgq input{flex:1;padding:10px 18px;border:1px solid #333;border-right:none;border-radius:4px 0 0 4px;background:#1A1A2E;color:#fff;font-size:.9rem;outline:none;transition:border-color .3s}
.gnsgq input:focus{border-color:#C41E3A}
.gnsgq button{padding:10px 24px;background:#C41E3A;color:#fff;border:none;border-radius:0 4px 4px 0;cursor:pointer;font-size:.9rem;transition:background .3s}
.gnsgq button:hover{background:#a0182e}

/* ============ Banner ============ */
.hmg9ko{position:relative;height:520px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hmg9ko .revvs{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.45)}
.hmg9ko .k1hbfnmg{position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,13,20,.3) 0%,rgba(13,13,20,.85) 100%)}
.d8nddln1{position:relative;z-index:2;text-align:center;max-width:800px;padding:0 20px}
.d8nddln1 h1{font-size:2.8rem;margin-bottom:16px;text-shadow:0 2px 20px rgba(0,0,0,.5)}
.d8nddln1 h1 span{color:#C41E3A}
.d8nddln1 p{font-size:1.15rem;color:#bbb;margin-bottom:24px;line-height:1.8}
.d8nddln1 .vpmir1{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.hkodp2r{background:rgba(196,30,58,.15);border:1px solid rgba(196,30,58,.4);color:#E8453A;padding:6px 16px;border-radius:20px;font-size:.85rem}

/* ============ Section Titles ============ */
.sewec{text-align:center;margin-bottom:40px}
.sewec h2{font-size:2rem;color:#fff;margin-bottom:10px}
.sewec h2 span{color:#C41E3A}
.sewec p{color:#888;font-size:1rem}
.sewec .jglpb4{width:60px;height:3px;background:#C41E3A;margin:12px auto 0}

/* ============ Video Cards ============ */
.xz9fs{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.pnng3m{background:#151520;border-radius:10px;overflow:hidden;transition:transform .3s,box-shadow .3s;cursor:pointer}
.pnng3m:hover{transform:translateY(-6px);box-shadow:0 12px 30px rgba(196,30,58,.15)}
.oehmuth{position:relative;padding-top:56.25%;overflow:hidden}
.oehmuth img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.pnng3m:hover .oehmuth img{transform:scale(1.05)}
.hcukvh{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;background:rgba(0,0,0,.4)}
.pnng3m:hover .hcukvh{opacity:1}
.hcukvh span{width:56px;height:56px;background:rgba(196,30,58,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0}
.hcukvh span::after{content:'';border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:3px}
.e7wl7hzo{padding:14px 16px}
.e7wl7hzo h3{font-size:1rem;color:#eee;margin-bottom:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.e7wl7hzo .n56whsh{display:flex;gap:14px;font-size:.8rem;color:#777}
.e7wl7hzo .n56whsh span{display:flex;align-items:center;gap:4px}
.taay2izi{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.taay2izi span{background:#1e1e30;color:#aaa;padding:2px 10px;border-radius:12px;font-size:.75rem}

/* ============ Short Video Section ============ */
.sdyp3rh{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px}
.wfrz678{position:relative;border-radius:10px;overflow:hidden;padding-top:160%;background:#151520}
.wfrz678 img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.wfrz678 .qizdzbvl{position:absolute;bottom:0;left:0;right:0;padding:12px;background:linear-gradient(transparent,rgba(0,0,0,.8))}
.wfrz678 .qizdzbvl p{color:#fff;font-size:.85rem}
.wfrz678 .k15pmp{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s}
.wfrz678:hover .k15pmp{opacity:1}
.wfrz678 .k15pmp span{width:44px;height:44px;background:rgba(196,30,58,.85);border-radius:50%;display:flex;align-items:center;justify-content:center}
.wfrz678 .k15pmp span::after{content:'';border-style:solid;border-width:8px 0 8px 14px;border-color:transparent transparent transparent #fff;margin-left:2px}

/* ============ AI Section ============ */
.vfj7g7{background:linear-gradient(135deg,#0D0D14 0%,#1A1A2E 100%)}
.tpfxzv{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px}
.bku2o{background:rgba(255,255,255,.03);border:1px solid rgba(196,30,58,.2);border-radius:12px;padding:30px;text-align:center;transition:all .3s}
.bku2o:hover{border-color:#C41E3A;background:rgba(196,30,58,.05)}
.bku2o .fbff6{width:64px;height:64px;margin:0 auto 16px;background:linear-gradient(135deg,#C41E3A,#E8453A);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.8rem}
.bku2o h3{color:#eee;font-size:1.1rem;margin-bottom:10px}
.bku2o p{color:#888;font-size:.9rem;line-height:1.6}

/* ============ Expert Section ============ */
.orfeo{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.a20sx{background:#151520;border-radius:12px;overflow:hidden;text-align:center;padding:30px 20px;transition:transform .3s}
.a20sx:hover{transform:translateY(-4px)}
.a20sx img{width:100px;height:100px;border-radius:50%;object-fit:cover;margin:0 auto 16px;border:3px solid #C41E3A}
.a20sx h3{color:#eee;font-size:1.05rem;margin-bottom:4px}
.a20sx .i3z3wl{color:#C41E3A;font-size:.85rem;margin-bottom:10px}
.a20sx p{color:#888;font-size:.85rem;line-height:1.6;margin-bottom:14px}
.a20sx .irluf7l{display:flex;gap:8px;justify-content:center}
.y81hyakc{padding:6px 16px;border-radius:20px;font-size:.8rem;border:1px solid #C41E3A;color:#C41E3A;transition:all .3s;cursor:pointer;background:transparent}
.y81hyakc:hover{background:#C41E3A;color:#fff}
.nlhqf3vx{background:#C41E3A;color:#fff;border:1px solid #C41E3A;padding:10px 28px;border-radius:6px;font-size:.95rem;cursor:pointer;transition:all .3s}
.nlhqf3vx:hover{background:#a0182e}

/* ============ Brand Wall ============ */
.w17uspa{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center}
.w17uspa .fmm1d8{background:#151520;border:1px solid #222;border-radius:8px;padding:16px 28px;color:#888;font-size:1rem;font-weight:600;transition:all .3s}
.w17uspa .fmm1d8:hover{border-color:#C41E3A;color:#C41E3A}

/* ============ FAQ Section ============ */
.rr9yhfkr{background:#0D0D14}
.g1mvx5{max-width:800px;margin:0 auto}
.zh6hq3k{border:1px solid #1e1e30;border-radius:8px;margin-bottom:12px;overflow:hidden}
.gl4dk1gk{padding:16px 20px;background:#151520;color:#eee;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-size:.95rem;transition:background .3s}
.gl4dk1gk:hover{background:#1a1a2e}
.gl4dk1gk .smq2xu{transition:transform .3s;color:#C41E3A;font-size:1.2rem}
.zh6hq3k.active .smq2xu{transform:rotate(180deg)}
.rfcocpwe{padding:0 20px;max-height:0;overflow:hidden;transition:all .3s;color:#999;font-size:.9rem;line-height:1.7}
.zh6hq3k.active .rfcocpwe{padding:16px 20px;max-height:300px}

/* ============ Reviews ============ */
.spbz7{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.qxiyw{background:#151520;border-radius:10px;padding:24px;border:1px solid #1e1e30}
.qxiyw .izmkjp{color:#FFB800;font-size:1rem;margin-bottom:10px;letter-spacing:2px}
.qxiyw p{color:#bbb;font-size:.9rem;line-height:1.7;margin-bottom:12px;font-style:italic}
.qxiyw .mklmo{display:flex;align-items:center;gap:10px}
.qxiyw .mklmo .avatar{width:36px;height:36px;border-radius:50%;background:#C41E3A;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.85rem}
.qxiyw .mklmo .name{color:#eee;font-size:.85rem}
.qxiyw .mklmo .date{color:#666;font-size:.75rem}

/* ============ How-To Guide ============ */
.dehf5eq8{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;margin-top:30px}
.e02gmpb{text-align:center;padding:24px}
.e02gmpb .ksdvv2qp{width:48px;height:48px;background:#C41E3A;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.2rem;font-weight:700;margin:0 auto 14px}
.e02gmpb h4{color:#eee;margin-bottom:8px}
.e02gmpb p{color:#888;font-size:.88rem}

/* ============ Contact Section ============ */
.q071sg2{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.c1kk2{background:#151520;border-radius:10px;padding:24px;border:1px solid #1e1e30}
.c1kk2 h3{color:#eee;font-size:1.05rem;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.c1kk2 h3 .icon{color:#C41E3A}
.c1kk2 p{color:#999;font-size:.9rem;line-height:1.8}
.c1kk2 a{color:#C41E3A}

/* ============ Share Buttons ============ */
.ii8r38jm{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:20px}
.bo6gj{padding:8px 20px;border-radius:20px;font-size:.85rem;color:#fff;border:none;cursor:pointer;transition:opacity .3s}
.bo6gj:hover{opacity:.85}
.eytlg{background:#07C160}
.vqn8zztp{background:#E6162D}
.m2ufbgs{background:#161823}
.fnqfx2e{background:#00A1D6}

/* ============ Footer ============ */
.g7hc9qc{background:#08080F;border-top:1px solid #1e1e30;padding:40px 0 20px}
.qt9aib02{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;margin-bottom:30px}
.vnubh3 h4{color:#eee;font-size:1rem;margin-bottom:14px;position:relative;padding-bottom:8px}
.vnubh3 h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:#C41E3A}
.vnubh3 p,.vnubh3 a{color:#888;font-size:.85rem;line-height:2}
.vnubh3 a:hover{color:#C41E3A}
.vnubh3 .n3hqqyi{height:40px;margin-bottom:10px}
.ogz805{display:flex;gap:16px;margin-top:10px}
.ogz805 img{width:100px;height:100px;border-radius:6px}
.xa0hs{text-align:center;padding-top:20px;border-top:1px solid #1e1e30;color:#666;font-size:.8rem}
.xa0hs a{color:#888}
.hz56p3xu{color:#555;font-size:.78rem;margin-top:6px}

/* ============ Breadcrumb ============ */
.fm56x{padding:14px 0;font-size:.85rem;color:#888}
.fm56x a{color:#999}
.fm56x a:hover{color:#C41E3A}
.fm56x span{margin:0 6px;color:#555}

/* ============ Inner Page ============ */
.kwhph{background:#12121E;padding:50px 0;text-align:center}
.kwhph h1{font-size:2rem;margin-bottom:8px}
.kwhph p{color:#888}
.akn9n2{background:#0D0D14;padding:40px 0}
.akn9n2 p{color:#bbb;line-height:1.8;margin-bottom:16px}
.akn9n2 h2{color:#fff;margin-bottom:16px;font-size:1.5rem}
.akn9n2 h3{color:#eee;margin-bottom:12px;font-size:1.2rem}

/* ============ MCP Widget ============ */
.aa0nqmdw{background:#151520;border:1px solid #1e1e30;border-radius:10px;padding:20px;margin-top:20px}
.aa0nqmdw h4{color:#eee;margin-bottom:10px}
.aa0nqmdw .clv2xe0u{display:flex;gap:8px}
.aa0nqmdw input{flex:1;padding:8px 14px;background:#1A1A2E;border:1px solid #333;border-radius:4px;color:#fff;outline:none}
.aa0nqmdw button{padding:8px 18px;background:#C41E3A;color:#fff;border:none;border-radius:4px;cursor:pointer}

/* ============ Responsive ============ */
@media(max-width:768px){
  .ndi6nyhe{flex-wrap:wrap}
  .dq4ru1m2{display:none;flex-direction:column;width:100%;padding:10px 0}
  .dq4ru1m2.show{display:flex}
  .yf4pxsz{display:block}
  .hmg9ko{height:380px}
  .d8nddln1 h1{font-size:1.8rem}
  .xz9fs{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
  .sdyp3rh{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}
  .eogwah{padding:40px 0}
  .qt9aib02{grid-template-columns:1fr}
  .gnsgq{max-width:100%}
}
@media(max-width:480px){
  .d8nddln1 h1{font-size:1.4rem}
  .d8nddln1 p{font-size:.95rem}
  .xz9fs{grid-template-columns:1fr}
  .sewec h2{font-size:1.5rem}
}

/* Lazy Load */
img[data-src]{opacity:0;transition:opacity .4s}
img.loaded{opacity:1}

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

/* ============ Community Modules ============ */
.w05l96n{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.ninzuz{background:rgba(255,255,255,.03);border:1px solid rgba(196,30,58,.15);border-radius:12px;padding:28px;text-align:center;transition:all .3s}
.ninzuz:hover{border-color:#C41E3A;background:rgba(196,30,58,.05);transform:translateY(-4px)}
.ninzuz .eusd1m6a{font-size:2.4rem;margin-bottom:14px;display:block}
.ninzuz h3{color:#eee;font-size:1.05rem;margin-bottom:10px}
.ninzuz p{color:#888;font-size:.88rem;line-height:1.7}

/* ============ Trust / EEAT Section ============ */
.l3mui4{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px}
.lrpphs{background:#151520;border:1px solid #1e1e30;border-radius:12px;padding:28px;text-align:center;transition:all .3s}
.lrpphs:hover{border-color:#C41E3A;transform:translateY(-4px)}
.lrpphs .f0dn35bm{font-size:2.4rem;margin-bottom:14px;display:block}
.lrpphs h4{color:#eee;font-size:1.05rem;margin-bottom:10px}
.lrpphs p{color:#888;font-size:.88rem;line-height:1.7}

/* ============ Expert Certification Badge ============ */
.wzm5f{color:#4CAF50;font-size:.8rem;margin-bottom:10px;font-weight:600}

/* ============ Video Duration Tag ============ */
.r1r6i{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.8);color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem;font-weight:600;z-index:2}

/* ============ Content Section Enhancements ============ */
.akn9n2 h2{padding-top:20px;border-top:1px solid #1e1e30;margin-top:20px}
.akn9n2 h2:first-child{border-top:none;margin-top:0;padding-top:0}

/* ============ Responsive Additions ============ */
@media(max-width:768px){
  .w05l96n{grid-template-columns:1fr 1fr}
  .l3mui4{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
  .w05l96n{grid-template-columns:1fr}
  .l3mui4{grid-template-columns:1fr}
}