:root{
    --ink:#000;
    --ink-2:#3a3d42;
    --ink-3:#86888e;
    --ink-4:#b6b8bd;
    --line:#e6e7ea;
    --bg:#fff;
    --nav:#fafbff;
    --pad:24px;
    --maxw:1296px;
  }
  *{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
  html{scroll-behavior:smooth}
  html,body{margin:0;padding:0}
  body{
    background:var(--bg);color:var(--ink);
    font-family:"PingFang SC",-apple-system,BlinkMacSystemFont,"Hiragino Sans GB","Microsoft YaHei",Tahoma,sans-serif;
    font-size:15px;line-height:1.75;-webkit-font-smoothing:antialiased;font-variant-numeric:tabular-nums;
    padding-top:50px;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}
  .c{text-align:center}

  /* ── 导航：与官网页一致（浅底 #fafbff、高 50px、fixed） */
  header{position:fixed;top:0;left:0;right:0;z-index:60;background:var(--nav);border-bottom:1px solid transparent;transition:border-color .3s ease,box-shadow .3s ease}
  header.scrolled{border-bottom-color:var(--line);box-shadow:0 1px 12px rgba(20,24,35,.05)}
  header .bar{display:flex;align-items:center;gap:12px;height:50px}
  header .logo{height:26px;width:auto}
  header .who{font-size:12px;color:var(--ink-3);letter-spacing:.06em}
  header .sep{width:1px;height:14px;background:var(--line)}
  header nav{display:none;gap:28px;margin-left:30px}
  header nav a{font-size:13.5px;color:var(--ink-2);padding:4px 0;border-bottom:1px solid transparent}
  header nav a:hover{color:var(--ink);border-bottom-color:var(--ink)}
  header .sp{flex:1}
  header .tel{font-size:13px;padding:7px 18px;background:var(--ink);color:#fff}

  /* ── 首屏：整屏图片 + 居中标题（对齐官网） */
  .hero{position:relative;min-height:560px;display:flex;align-items:center;background:#0a1018;overflow:hidden}
  .hero .bg{position:absolute;inset:0}
  .hero .bg img{width:100%;height:100%;object-fit:cover;object-position:center 42%;filter:brightness(.52) saturate(.85) contrast(1.06)}
  .hero .veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(9,11,15,.84) 0%,rgba(9,11,15,.62) 44%,rgba(9,11,15,.9) 100%)}
  .hero .inner{position:relative;width:100%;padding:76px 0 56px;text-align:center;color:#fff}
  .hero h1{font-size:26px;font-weight:400;line-height:1.5;letter-spacing:.01em;margin:0 auto 16px;max-width:880px}
  .hero .lead{font-size:14px;color:rgba(255,255,255,.76);margin:0 auto 30px;max-width:620px;line-height:1.9}
  .hero .btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
  .b1,.b2{display:inline-block;font-size:14px;padding:13px 30px;transition:opacity .2s,background .2s}
  .b1{background:#fff;color:var(--ink)}
  .b1:hover{opacity:.86}
  .b2{border:1px solid rgba(255,255,255,.62);color:#fff}
  .b2:hover{background:rgba(255,255,255,.12)}
  .hero .stats{margin:52px auto 0;max-width:900px;display:grid;grid-template-columns:repeat(2,1fr);gap:24px 12px;border-top:1px solid rgba(255,255,255,.16);padding-top:26px}
  .hero .stats .n{font-size:24px;font-weight:400}
  .hero .stats .n small{font-size:12px;color:rgba(255,255,255,.6);margin-left:3px}
  .hero .stats .l{font-size:11.5px;color:rgba(255,255,255,.55);letter-spacing:.03em}

  /* ── 区块 */
  /* 无副标题的区块标题：收紧与下方内容的间距 */
  .shead.solo{margin-bottom:26px}
  @media (min-width:760px){
    .shead.solo{margin-bottom:34px}
  }

  section{padding:56px 0}
  .dark{background:#000;color:#fff}
  .dark .sh,.dark h4{color:#fff}
  .dark .ss,.dark .col p{color:rgba(255,255,255,.6)}
  .dark .sidx{color:rgba(255,255,255,.38)}
  .soft{background:var(--nav)}
  .shead{margin-bottom:34px}
  .sidx{display:block;font-size:11.5px;letter-spacing:.16em;color:var(--ink-4);margin-bottom:12px}
  .sh{font-size:22px;font-weight:400;line-height:1.5;letter-spacing:.01em;margin:0 0 10px}
  .ss{font-size:13.5px;color:var(--ink-3);margin:0 auto;max-width:660px;line-height:1.9}

  /* ── 场景卡 */
  .cases{display:grid;grid-template-columns:1fr;gap:2px;background:var(--line)}
  .case{position:relative;background:#101114;color:#fff;min-height:340px;padding:30px 26px 26px;display:flex;flex-direction:column;justify-content:flex-end;overflow:hidden}
  .case .pat{position:absolute;inset:0;opacity:.5;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:40px 40px}
  .case .photo{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity .6s;filter:saturate(.35) brightness(.95)}
  .case .photo.on{opacity:.62}
  .case .scrim{position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.85),rgba(0,0,0,.3))}
  .case .body{position:relative}
  .case .tag{display:inline-block;font-size:11px;letter-spacing:.1em;color:rgba(255,255,255,.62);border:1px solid rgba(255,255,255,.24);padding:4px 10px;margin-bottom:14px}
  .case h3{font-size:19px;font-weight:400;margin:0 0 8px;line-height:1.5}
  .case p{font-size:13px;color:rgba(255,255,255,.68);margin:0 0 20px;line-height:1.8;max-width:420px}
  .case .kv{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;border-top:1px solid rgba(255,255,255,.16);padding-top:16px}
  .case .kv .n{font-size:20px}
  .case .kv .n small{font-size:11px;color:rgba(255,255,255,.55);margin-left:2px}
  .case .kv .l{font-size:11px;color:rgba(255,255,255,.5)}

  /* ── 全宽图片带（对齐官网：整屏图块） */
  .band{position:relative;height:280px;overflow:hidden;background:#0a1018}
  .band img{width:100%;height:100%;object-fit:cover;object-position:center 60%;filter:brightness(.6) saturate(.9)}
  .band .veil{position:absolute;inset:0;background:linear-gradient(90deg,rgba(8,10,14,.86),rgba(8,10,14,.42))}
  .band2{height:230px}
  .band2 img{object-position:center 52%;filter:brightness(.66) saturate(.9)}
  .band2 .veil{background:linear-gradient(180deg,rgba(8,10,14,.7),rgba(8,10,14,.84))}
  .band2 .cap .t{font-size:16px}
  .band2 .cap .d{margin-top:6px}
  .band .cap{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;color:#fff}
  .band .cap .t{font-size:19px;font-weight:400;margin-bottom:10px}
  .band .cap .d{font-size:13px;color:rgba(255,255,255,.7);max-width:520px;line-height:1.9}

  /* ── 车型（黑底，对齐官网 X6 版块） */
  .model{display:grid;grid-template-columns:1fr;gap:34px}
  .spec{border-top:1px solid var(--line)}
  .spec .row{display:grid;grid-template-columns:1fr;gap:5px;padding:18px 0;border-bottom:1px solid var(--line)}
  .spec .k{font-size:12.5px;color:#6a6c72;letter-spacing:.04em}
  .spec .v{font-size:14.5px;color:var(--ink-2);line-height:1.85}
  .spec .v b{font-weight:400;color:var(--ink)}
  /* 黑底区块内的参数表（首页/车型区） */
  .dark .spec{border-top-color:rgba(255,255,255,.16)}
  .dark .spec .row{border-bottom-color:rgba(255,255,255,.16)}
  .dark .spec .k{color:rgba(255,255,255,.5)}
  .dark .spec .v{color:rgba(255,255,255,.86)}
  .dark .spec .v b{color:#fff}
  .model .visual{position:relative;background:#0e0f12;min-height:230px;display:flex;align-items:flex-end}
  .model .visual img{width:100%;height:100%;object-fit:cover;filter:brightness(.78)}
  .model .visual span{position:absolute;left:16px;bottom:14px;font-size:11px;color:rgba(255,255,255,.5)}
  .cta-note{margin-top:26px;font-size:13px;color:rgba(255,255,255,.62);text-align:center}
  .cta-note a{color:#fff;border-bottom:1px solid rgba(255,255,255,.5);padding-bottom:1px}

  /* ── 流程 */
  .flow{border-top:1px solid var(--line)}
  .flow .st{padding:22px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:40px 1fr;gap:14px}
  .flow .st .i{font-size:11.5px;color:var(--ink-4);letter-spacing:.1em;padding-top:4px}
  .flow .st .t b{font-size:15px;font-weight:400;display:block;margin-bottom:4px}
  .flow .st .t span{font-size:13.5px;color:#6a6c72;line-height:1.8}

  /* ── 三栏 */
  .cols{display:grid;grid-template-columns:1fr;gap:2px;background:var(--line)}
  .col{background:#fff;padding:26px 22px}
  .col .bt{font-size:11.5px;color:var(--ink-4);letter-spacing:.1em;margin-bottom:12px}
  .col h4{font-size:15.5px;font-weight:400;margin:0 0 9px}
  .col p{font-size:13px;color:var(--ink-3);margin:0;line-height:1.85}
  .cities{display:flex;flex-wrap:wrap;gap:9px;justify-content:center;margin-top:26px}
  .cities span{font-size:12.5px;color:var(--ink-2);border:1px solid var(--line);padding:6px 13px;background:#fff}

  /* ── 表单 */
  .formwrap{display:grid;grid-template-columns:1fr;gap:32px}
  .flist{border-top:1px solid var(--line);margin-top:4px}
  .flist div{padding:13px 0;border-bottom:1px solid var(--line);font-size:13px;color:var(--ink-2)}
  .fld{margin-bottom:16px}
  label{display:block;font-size:12px;color:var(--ink-3);margin-bottom:7px;letter-spacing:.03em}
  input,select,textarea{width:100%;font-size:15px;font-family:inherit;color:var(--ink);background:#fff;border:1px solid var(--line);padding:12px 13px;outline:none;border-radius:0;-webkit-appearance:none;appearance:none;transition:border-color .2s}
  /* 彻底去掉原生下拉箭头（含 Safari / iOS / IE / Firefox） */
  select{-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:none !important;background-repeat:no-repeat;padding-right:13px;text-indent:0}
  select::-ms-expand{display:none}
  select::-webkit-appearance-none{-webkit-appearance:none}
  input:focus,select:focus,textarea:focus{border-color:var(--ink)}
  textarea{min-height:88px;resize:vertical}
  .two{display:grid;grid-template-columns:1fr;gap:16px}
  .sub{width:100%;font-size:15px;padding:15px;border:0;background:var(--ink);color:#fff;font-family:inherit;cursor:pointer}
  .sub:hover{opacity:.88}
  .sub:disabled{opacity:.5}
  .ok,.err{font-size:13px;margin-top:14px;display:none}
  .ok{color:#1c7c4d}.err{color:#b3261e}
  .privacy{font-size:11.5px;color:var(--ink-4);margin-top:12px;text-align:center}

  /* ── 页脚 */
  footer{background:#000;color:rgba(255,255,255,.55);padding:52px 0 60px;font-size:12.5px;text-align:center}
  footer .fname{font-size:14.5px;color:#fff;margin-bottom:14px}
  footer .fl{margin-bottom:7px;line-height:1.85}
  footer .fmeta{margin-top:24px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);color:rgba(255,255,255,.38);line-height:1.9}
  footer .fnav{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 18px;margin-top:20px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12)}
  footer .fnav a{font-size:12.5px;color:rgba(255,255,255,.72);border-bottom:1px solid transparent;padding-bottom:1px}
  footer .fnav a:hover{color:#fff;border-bottom-color:rgba(255,255,255,.6)}

  .bar-cta{position:fixed;left:0;right:0;bottom:0;display:flex;gap:10px;padding:10px 14px 16px;background:linear-gradient(to top,#fff 58%,rgba(255,255,255,0));z-index:45}
  .bar-cta a{flex:1;text-align:center;font-size:15px;padding:14px 0}
  .bar-cta a:first-child{background:var(--ink);color:#fff}
  .bar-cta a:last-child{background:#fff;color:var(--ink);border:1px solid var(--line)}
  body{padding-bottom:86px}

  .fx{opacity:0;transform:translateY(16px);transition:opacity .75s cubic-bezier(.2,.6,.2,1),transform .75s cubic-bezier(.2,.6,.2,1)}
  .fx.in{opacity:1;transform:none}

  /* ── 紧凑排版（产品页等信息密度优先的页面） */
  body.compact section{padding:40px 0}
  body.compact .shead{margin-bottom:24px}
  body.compact .shead.c{margin-bottom:20px}
  body.compact .spec .row{padding:12px 0}
  body.compact .cols .col{padding:20px 18px}
  body.compact .cols .col h4{font-size:20px;margin:0 0 5px}
  body.compact .cols .col p{font-size:12.5px;line-height:1.7}
  body.compact .formwrap{gap:24px}
  body.compact .flist div{padding:10px 0}
  body.compact textarea{min-height:64px}
  body.compact footer{padding:40px 0 46px}
  @media (min-width:760px){
    body.compact section{padding:48px 0}
  }

  @media (min-width:760px){
    :root{--pad:72px}
    header nav{display:flex}
    section{padding:100px 0}
    .hero{min-height:760px}
    .hero .inner{padding:120px 0 84px}
    .hero h1{font-size:42px;line-height:1.4}
    .hero .lead{font-size:15.5px}
    .hero .stats{grid-template-columns:repeat(4,1fr);gap:0;margin-top:64px;max-width:1000px}
    .hero .stats .item{padding:0 26px;border-left:1px solid rgba(255,255,255,.16)}
    .hero .stats .item:first-child{border-left:0}
    .hero .stats .n{font-size:34px}
    .sh{font-size:31.5px}
    .ss{font-size:14.5px}
    .shead{margin-bottom:52px}
    .band{height:520px}
    .band2{height:360px}
    .band2 .cap .t{font-size:26px}
    .band .cap .t{font-size:31.5px}
    .band .cap .d{font-size:15px}
    .cases{grid-template-columns:1fr 1fr}
    .case{min-height:400px;padding:38px 34px 32px}
    .model{grid-template-columns:1.05fr .95fr;gap:60px;align-items:start}
    .spec .row{grid-template-columns:140px 1fr;gap:20px;align-items:baseline}
    .flow{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--line)}
    .flow .st{display:block;border-bottom:0;border-top:0;padding:24px 22px 0 0}
    .flow .st .i{display:block;margin-bottom:14px;padding-top:0}
    .cols{grid-template-columns:repeat(3,1fr)}
    .col{padding:38px 32px}
    .formwrap{grid-template-columns:1fr 1.1fr;gap:76px}
    .two{grid-template-columns:1fr 1fr}
    .bar-cta{display:none}
    body{padding-bottom:0}
  }
  /* ── 子页面：矮首屏 */
  .hero-sm{min-height:340px}
  .hero-sm .inner{padding:120px 0 52px;text-align:left}
  .hero-sm h1{font-size:26px;max-width:720px}
  .hero-sm .lead{max-width:640px;font-size:14.5px}
  .hero-sm .btns{justify-content:flex-start}
  @media (min-width:760px){
    .hero-sm{min-height:440px}
    .hero-sm .inner{padding:150px 0 64px}
    .hero-sm h1{font-size:38px}
    .hero-sm .lead{font-size:16px}
  }
  .cols .col h4{font-size:22px;font-weight:400;color:var(--ink);margin:0 0 6px}

  .case .go{display:inline-block;margin-top:14px;font-size:13px;color:#fff;border-bottom:1px solid rgba(255,255,255,.5);padding-bottom:1px}
  .case .go:hover{border-bottom-color:#fff}

  /* 头部 CTA 弹层（PC 端显示联系方式） */
  header{position:fixed}
  .telpop{display:none;position:fixed;top:64px;right:20px;z-index:80;background:#fff;border:1px solid var(--line,#e3e4e8);
          padding:14px 18px;box-shadow:0 8px 28px rgba(20,24,35,.12);min-width:190px}
  .telpop.on{display:block}
  .telpop .tp-k{font-size:11.5px;color:#8a8a90;letter-spacing:.06em;margin-bottom:6px}
  .telpop .tp-v{font-size:20px;font-weight:600;letter-spacing:.01em;margin-bottom:6px}
  .telpop .tp-s{font-size:12px;color:#6b6b72}
  @media (max-width:860px){ .telpop{display:none !important} }

  /* 场景卡：降本数据块 */
  .case .save{margin-top:4px;padding-top:16px;border-top:1px solid rgba(255,255,255,.2)}
  .case .save .sk{font-size:11.5px;color:rgba(255,255,255,.6);letter-spacing:.08em;margin-bottom:8px}
  .case .save .sv{display:flex;align-items:baseline;gap:9px;flex-wrap:wrap;font-size:24px;color:#fff;letter-spacing:-.01em;line-height:1.15}
  .case .save .sv s{color:rgba(255,255,255,.45);font-size:14px;text-decoration:line-through}
  .case .save .sv em{font-style:normal;font-size:13.5px;color:#7ce0b0;border:1px solid rgba(124,224,176,.45);background:rgba(124,224,176,.08);padding:3px 9px;margin-left:2px}
  .case .save .snote{font-size:11px;color:rgba(255,255,255,.4);margin-top:8px}