/* ============================================================
   ARKAMOTO — site.css
   全站公共样式：设计 token + 组件库 + header/nav + hero 骨架
                + inquiry 区块 + footer + reveal + 响应式

   来源：从 index-b-lineup-grid.html（首页定稿版）的 <style> 逐行原样抽出，
        顺序与内容未作任何改动，以保证渲染结果与定稿版完全一致。
        新增页面专属样式请写在各自页面的 <style> 里（必须放在
        <link rel="stylesheet" href="assets/css/site.css"> 之后）。
   ============================================================ */
/* ============================================================
   ARKA — Industrial Editorial System  (index-c)
   ============================================================ */
:root{
  --paper:#F3F1EA;
  --paper-2:#E9E6DD;
  --ink:#14162A;
  --navy:#1a218c;
  --orange:#F0950A;
  --orange-d:#C97E06;
  --muted:#6C6F7B;
  --line:rgba(20,22,42,.14);
  --line-2:rgba(243,241,234,.16);
  --hh:74px;
  --fs-body:16px;          /* 正文基准：正文段落一律用这个 */
  --fs-mini:11.5px;        /* 标签/角标最小字号 */
  --max:1480px;
  --pad:clamp(20px,5vw,72px);
  --display:'Anton',Impact,sans-serif;
  --sans:'Archivo',-apple-system,Segoe UI,Roboto,sans-serif;
  --mono:'Space Mono','Courier New',monospace;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--paper);color:var(--ink);font-family:var(--sans);
  font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul{list-style:none}
::selection{background:var(--orange);color:#fff}

/* ---------- shared ---------- */
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}
.container{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}
.eyebrow{
  font-family:var(--mono);font-size:11px;font-weight:700;letter-spacing:.32em;
  text-transform:uppercase;color:var(--orange);display:inline-flex;align-items:center;gap:14px;
}
.eyebrow::before{content:"";width:34px;height:2px;background:var(--orange)}
.section{padding:clamp(72px,9vw,140px) 0;position:relative}
.sec-head{max-width:920px}
.sec-title{
  font-family:var(--display);font-weight:400;text-transform:uppercase;
  font-size:clamp(2.1rem,5.2vw,4.4rem);line-height:.96;letter-spacing:.005em;margin-top:18px;
}
.sec-title .em{color:var(--orange)}
.lead{margin-top:22px;color:var(--muted);font-size:clamp(16px,1.15vw,18px);max-width:68ch;line-height:1.68}

/* spec table (technical mono) */
.specs{display:flex;flex-wrap:wrap;gap:0;border-top:1px solid var(--line);margin-top:26px}
.specs div{
  flex:1 1 140px;padding:15px 18px 15px 0;border-bottom:1px solid var(--line);
  font-family:var(--mono);font-size:13.5px;letter-spacing:.04em;color:var(--ink);
}
.specs div span{display:block;color:var(--muted);font-size:11px;letter-spacing:.18em;text-transform:uppercase;margin-bottom:6px}
.cert-row{display:flex;align-items:center;gap:10px;margin-top:18px;flex-wrap:wrap}
.cert-label{font-family:var(--mono);font-size:11px;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--orange);margin-right:4px}
.cert-badge{font-family:var(--mono);font-size:12.5px;letter-spacing:.1em;color:var(--ink);border:1px solid var(--line);padding:5px 12px}

/* buttons */
.btn{
  display:inline-flex;align-items:center;gap:12px;font-family:var(--sans);font-weight:800;
  font-size:13.5px;letter-spacing:.1em;text-transform:uppercase;padding:16px 32px;cursor:pointer;
  border:1px solid transparent;transition:transform .25s,background .25s,color .25s,border-color .25s;
}
.btn svg{transition:transform .25s}
.btn:hover svg{transform:translateX(4px)}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--ink);transform:translateY(-2px)}
.btn-solid{background:var(--orange);color:#0A0A0B}
.btn-solid:hover{background:#fff;color:#0A0A0B}
.btn-ghost{border-color:rgba(244,242,238,.4);color:var(--paper)}
.btn-ghost:hover{border-color:var(--orange);color:var(--orange)}
.btn-ghost-l{background:transparent;border-color:var(--line-2);color:var(--paper)}
.btn-ghost-l:hover{background:var(--orange);border-color:var(--orange);color:#fff}
.btn-arrow{font-family:var(--sans);font-weight:800;font-size:13px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--ink);border:1px solid var(--ink);padding:12px 18px 12px 20px;
  display:inline-flex;align-items:center;gap:14px;transition:background .3s,color .3s,border-color .3s}
.btn-arrow svg{width:22px;height:22px;flex-shrink:0;padding:3px;border:1px solid var(--orange);border-radius:50%;color:var(--orange);transition:transform .3s,background .3s,color .3s}
.btn-arrow:hover{background:var(--orange);color:#fff;border-color:var(--orange)}
.btn-arrow:hover svg{background:#fff;color:var(--orange);transform:translateX(4px)}

/* ---------- header (overlay) ---------- */
header{
  position:fixed;inset:0 0 auto 0;z-index:100;
  transition:background .3s ease,border-color .3s ease,padding .3s ease;
  border-bottom:1px solid transparent;padding:0;
}
header .bar{
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  height:86px;transition:height .3s ease;
}
header.scrolled{background:var(--paper);border-color:rgba(20,22,42,.14);backdrop-filter:blur(10px)}
header.scrolled .bar{height:68px}
header.scrolled .logo img{filter:none}
header.scrolled nav.main a{color:var(--ink)}
header.scrolled nav.main a:hover{color:var(--orange)}
header.scrolled nav.main .drop-panel a{color:#CFCCC4}
header.scrolled nav.main .drop-panel a:hover{color:#fff;background:rgba(240,149,10,.08)}
header.scrolled .btn-ghost{border-color:var(--ink);color:var(--ink)}
header.scrolled .btn-ghost:hover{border-color:var(--orange);color:var(--orange)}
header.scrolled .burger span{background:var(--ink)}
body.menu-open header .burger span{background:var(--paper)}
.logo{display:flex;align-items:center;gap:14px}
.logo img{height:44px;width:auto;filter:brightness(0) invert(1)}
nav.main{display:flex;gap:38px}
nav.main a{
  font-size:12px;font-weight:600;letter-spacing:.22em;text-transform:uppercase;
  color:var(--paper);opacity:.85;position:relative;padding:6px 0;transition:.2s;
}
nav.main a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--orange);transition:width .25s ease;
}
nav.main a:hover{opacity:1;color:var(--orange)}
nav.main a:hover::after{width:100%}
/* products dropdown (identical to A-version) */
.drop{position:relative}
.drop > a{display:flex;align-items:center;gap:7px}
.drop .caret{font-size:9px;color:var(--orange);transition:transform .2s}
.drop:hover .caret,.drop:focus-within .caret{transform:rotate(180deg)}
.drop-panel{
  position:absolute;top:100%;left:0;transform:translateY(12px);min-width:252px;
  padding:12px 0;background:#15161a;border:1px solid var(--line);border-radius:3px;
  box-shadow:0 26px 52px rgba(0,0,0,.55);opacity:0;visibility:hidden;transition:.22s ease;z-index:120;
}
.drop:hover .drop-panel,.drop:focus-within .drop-panel{opacity:1;visibility:visible;transform:translateY(6px)}
nav.main .drop-panel a{display:block;padding:13px 26px;font-size:13.5px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:#CFCCC4;transition:.15s}
nav.main .drop-panel a:hover{color:#fff;background:rgba(240,149,10,.08)}
.has-sub{position:relative}
.has-sub > a{display:flex;justify-content:space-between;align-items:center}
.has-sub > a::after{content:"\203A";color:var(--orange);font-size:15px;line-height:1}
.fly{
  position:absolute;left:100%;top:-10px;min-width:176px;padding:10px 0;background:#15161a;
  border:1px solid var(--line);border-radius:3px;box-shadow:0 26px 52px rgba(0,0,0,.55);
  opacity:0;visibility:hidden;transform:translateX(8px);transition:.2s ease;z-index:121;
}
.has-sub:hover .fly,.has-sub:focus-within .fly{opacity:1;visibility:visible;transform:none}
.mobile-nav .sub{padding-left:26px;font-size:1.5rem;color:#CFCCC4;border-bottom:1px solid rgba(38,40,44,.6)}
.mobile-nav .sub:hover{color:var(--orange)}
section[id],footer[id]{scroll-margin-top:84px}
.hdr-cta{display:flex;align-items:center;gap:14px}
.btn-sm{padding:11px 22px;font-size:13px}
.burger{display:none;background:none;border:0;cursor:pointer;width:40px;height:40px;position:relative;z-index:110}
.burger span{position:absolute;left:8px;right:8px;height:2px;background:var(--paper);transition:.3s}
.burger span:nth-child(1){top:13px}
.burger span:nth-child(2){top:19px}
.burger span:nth-child(3){top:25px}
body.menu-open .burger span:nth-child(1){top:19px;transform:rotate(45deg)}
body.menu-open .burger span:nth-child(2){opacity:0}
body.menu-open .burger span:nth-child(3){top:19px;transform:rotate(-45deg)}
section[id],footer[id]{scroll-margin-top:84px}
.mobile-nav{
  position:fixed;inset:0;background:rgba(10,10,11,.98);z-index:105;
  display:none;flex-direction:column;justify-content:center;gap:8px;padding:0 40px;overflow:auto;
}
body.menu-open .mobile-nav{display:flex}
.mobile-nav a{font-size:1.7rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--paper);padding:14px 0;border-bottom:1px solid var(--line)}
.mobile-nav a:hover{color:var(--orange)}
.mobile-nav .sub{padding-left:26px;font-size:1.5rem;color:#CFCCC4;border-bottom:1px solid rgba(38,40,44,.6)}
.mobile-nav .sub:hover{color:var(--orange)}
.mobile-nav .btn{margin-top:18px;justify-content:center}

/* ---------- hero ---------- */
.hero{position:relative;height:100svh;min-height:560px;overflow:hidden;background:var(--ink)}
.hero video,.hero-media{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
/* 在 hero 里使用 <img class="hero-media"> 作为背景（分类页），首页仍用 video */
.hero::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,11,20,.55) 0%,rgba(10,11,20,.15) 35%,rgba(10,11,20,.82) 100%),
             linear-gradient(90deg,rgba(10,11,20,.78) 0%,rgba(10,11,20,.15) 55%);}
.hero-inner{position:relative;z-index:3;height:100%;display:flex;flex-direction:column;justify-content:flex-end;
  padding:0 var(--pad) clamp(28px,5vh,56px);max-width:var(--max);margin:0 auto}
.hero-top{position:absolute;top:calc(var(--hh) + 22px);right:var(--pad);z-index:3;
  display:flex;justify-content:flex-end;font-family:var(--mono);font-size:11px;letter-spacing:.22em;
  text-transform:uppercase;color:rgba(243,241,234,.7)}
.hero-top .r{color:var(--orange)}
.hero h1{font-family:var(--display);font-weight:400;text-transform:uppercase;color:#fff;
  font-size:clamp(2.6rem,7vw,6rem);line-height:.9;letter-spacing:.01em;max-width:14ch}
.hero h1 .o{color:var(--orange)}
.hero .sub{margin-top:24px;color:rgba(243,241,234,.84);max-width:60ch;font-size:clamp(16px,1.25vw,18.5px);line-height:1.68}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-foot{position:absolute;bottom:clamp(20px,4vh,34px);right:var(--pad);z-index:3;
  display:flex;align-items:center;gap:18px;font-family:var(--mono);font-size:10px;letter-spacing:.2em;
  text-transform:uppercase;color:rgba(243,241,234,.62)}
.hero-foot .scroll{color:var(--orange)}
.hero-certs{display:flex;gap:8px}
.hero-certs span{border:1px solid var(--line-2);padding:5px 10px;color:rgba(243,241,234,.8)}

/* corner registration marks */
.mark{position:absolute;width:18px;height:18px;z-index:3;opacity:.5}
.mark.tl{top:calc(var(--hh) + 14px);left:14px;border-top:2px solid var(--orange);border-left:2px solid var(--orange)}
.mark.tr{top:calc(var(--hh) + 14px);right:14px;border-top:2px solid var(--orange);border-right:2px solid var(--orange)}
.mark.bl{bottom:14px;left:14px;border-bottom:2px solid var(--orange);border-left:2px solid var(--orange)}
.mark.br{bottom:14px;right:14px;border-bottom:2px solid var(--orange);border-right:2px solid var(--orange)}


/* ---------- lineup ---------- */
.lineup{border-top:1px solid var(--line);background:var(--paper)}
.lineup-head{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;margin-bottom:64px;flex-wrap:wrap}
.lineup-head .lead{max-width:560px;margin:0}
.lineup-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.lineup .card{background:#fff;border:1px solid var(--line);display:flex;flex-direction:column;transition:border-color .3s ease,transform .3s ease}
.lineup .card:hover{border-color:rgba(240,149,10,.6);transform:translateY(-6px)}
.card-fig{position:relative;background:#fff;overflow:hidden;aspect-ratio:4/3}
.card-fig a{display:block;width:100%;height:100%}
.card-fig img{width:100%;height:100%;padding:5%;object-fit:cover;transition:transform .6s cubic-bezier(.2,.6,.2,1)}
.card-fig img.flip{transform:scaleX(-1)}
.card:hover .card-fig img{transform:scale(1.05)}
.card:hover .card-fig img.flip{transform:scaleX(-1) scale(1.05)}
.card-no{position:absolute;top:16px;left:16px;z-index:2;font-family:var(--display);font-size:1.15rem;background:var(--orange);color:var(--ink);padding:5px 12px}
.card-body{padding:30px 30px 26px;display:flex;flex-direction:column;flex:1}
.card-series{font-family:var(--mono);font-size:12px;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--orange);margin-bottom:8px}
.lineup .card h3{font-family:var(--display);font-weight:400;text-transform:uppercase;font-size:clamp(1.1rem,1.75vw,1.55rem);line-height:1.02;margin-bottom:14px;white-space:nowrap}
.card-tag{color:var(--muted);font-size:var(--fs-body);margin-bottom:18px;line-height:1.6}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.chips span{font-family:var(--mono);font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;border:1px solid rgba(240,149,10,.7);color:var(--ink);background:rgba(240,149,10,.08);padding:6px 11px}
.lineup .card ul{display:flex;flex-direction:column;gap:10px;margin-bottom:24px}
.lineup .card ul li{font-size:var(--fs-body);color:var(--muted);display:flex;gap:12px;line-height:1.62}
.lineup .card ul li::before{content:"";flex:none;width:6px;height:6px;background:var(--orange);transform:translateY(7px)}
.card-foot{margin-top:auto;display:flex;justify-content:space-between;align-items:center;gap:14px;border-top:1px solid var(--line);padding-top:20px;flex-wrap:wrap}
.card-foot .cert{font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--muted);font-weight:700}
.link-arrow{font-family:var(--sans);font-weight:800;text-transform:uppercase;letter-spacing:.08em;font-size:13px;color:var(--orange);display:inline-flex;align-items:center;gap:8px;transition:.25s}
.link-arrow svg{transition:transform .25s}.link-arrow:hover{color:var(--navy)}.link-arrow:hover svg{transform:translateX(5px)}

/* thumbnail strip */

/* ---------- R&D / difference ---------- */
.rnd{position:relative;overflow:hidden;border-top:1px solid var(--line);background:var(--paper-2)}
.rnd .bg{position:absolute;inset:0;z-index:0}
.rnd .bg img{width:100%;height:100%;object-fit:cover;opacity:.11}
.rnd .wrap{position:relative;z-index:2}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:clamp(40px,6vw,72px);border-top:2px solid var(--ink)}
.step{padding:34px 32px 34px 0}
.step .n{font-family:var(--display);font-size:2.4rem;color:var(--orange);line-height:1}
.step h3{font-family:var(--sans);font-weight:800;text-transform:uppercase;letter-spacing:.04em;font-size:1.05rem;margin:14px 0 12px}
.step p{color:var(--muted);font-size:var(--fs-body);line-height:1.7}
.statement{margin-top:clamp(48px,7vw,90px);background:var(--navy);color:var(--paper);padding:clamp(40px,6vw,80px) var(--pad);position:relative;overflow:hidden}
.statement .wrap{padding:0}
.statement .eyebrow{color:var(--orange)}
.statement .eyebrow::before{background:var(--orange)}
.statement h2{font-family:var(--display);font-weight:400;text-transform:uppercase;font-size:clamp(1.9rem,5vw,4rem);line-height:.98;margin-top:18px}
.statement h2 .em{color:var(--orange)}
.statement .row{display:flex;flex-wrap:wrap;align-items:center;gap:24px;margin-top:36px}
.statement p.note{color:rgba(243,241,234,.72);font-size:15.5px;max-width:46ch;line-height:1.65}

/* ---------- OEM/ODM ---------- */
.oem{border-top:1px solid var(--line);background:var(--paper)}
.oem-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,80px);align-items:start;margin-top:clamp(40px,6vw,64px)}
.pillar{display:grid;grid-template-columns:46px 1fr;gap:20px;padding:28px 0;border-bottom:1px solid var(--line)}
.pillar:first-child{border-top:1px solid var(--line)}
.pillar .ic{width:46px;height:46px;border:1px solid var(--ink);display:flex;align-items:center;justify-content:center;color:var(--orange);flex-shrink:0}
.pillar .ic svg{width:22px;height:22px;stroke:var(--orange);fill:none;stroke-width:1.5}
.pillar h4{font-family:var(--sans);font-weight:800;text-transform:uppercase;letter-spacing:.04em;font-size:1rem;margin-bottom:8px}
.pillar p{color:var(--muted);font-size:var(--fs-body);line-height:1.7}
.oem-visual{position:relative;border:1px solid var(--line);background:var(--ink);overflow:hidden}
.oem-visual .slide{display:none;position:relative}
.oem-visual .slide.active{display:block}
.oem-visual img{width:100%;aspect-ratio:4/3;object-fit:cover}
.oem-visual .cap{position:absolute;left:0;right:0;bottom:0;padding:28px 22px 18px;background:linear-gradient(0deg,rgba(10,11,20,.9),transparent)}
.oem-visual .cap .n{font-family:var(--display);color:var(--orange);font-size:1.1rem}
.oem-visual .cap h5{font-family:var(--sans);color:#fff;text-transform:uppercase;font-weight:800;letter-spacing:.04em;font-size:1rem;margin:2px 0}
.oem-visual .cap p{color:rgba(243,241,234,.78);font-size:14px}
.oem-dots{position:absolute;bottom:14px;right:16px;display:flex;gap:7px;z-index:3}
.oem-dots button{width:9px;height:9px;border:1px solid rgba(243,241,234,.6);background:transparent;cursor:pointer;padding:0;transition:.3s}
.oem-dots button.active{background:var(--orange);border-color:var(--orange)}

/* ---------- cases / proof ---------- */
.cases{position:relative;color:var(--paper);overflow:hidden;background:var(--ink)}
.cases .bg{position:absolute;inset:0;z-index:0}
.cases .bg img{width:100%;height:100%;object-fit:cover;opacity:.42;filter:grayscale(.3) contrast(1.05)}
.cases::after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(90deg,rgba(10,11,20,.92),rgba(10,11,20,.45) 70%)}
.cases .wrap{position:relative;z-index:2}
.cases .eyebrow{color:var(--orange)}
.cases .eyebrow::before{background:var(--orange)}
.cases .sec-title{color:#fff}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(20px,3vw,40px);margin-top:clamp(40px,6vw,68px)}
.stat{border-left:2px solid var(--orange);padding-left:18px}
.stat .num{font-family:var(--display);font-size:clamp(2.4rem,5vw,4.2rem);line-height:.9;color:#fff}
.stat .num .em{color:var(--orange)}
.stat .lab{margin-top:10px;font-family:var(--mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:rgba(243,241,234,.7)}
.quote-box{margin-top:clamp(48px,7vw,84px);max-width:760px;min-height:120px}
.quote-mark{font-family:var(--display);font-size:4rem;color:var(--orange);line-height:.5}
.quote-box blockquote{font-family:var(--display);font-weight:400;text-transform:uppercase;font-size:clamp(1.15rem,2.5vw,2.05rem);line-height:1.05;color:#fff;transition:opacity .5s}
.quote-box cite{display:block;margin-top:16px;font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--orange);font-style:normal}

/* ---------- riding showcase — featured + thumbnails ---------- */
.showcase{background:var(--paper)}
.fg{display:grid;grid-template-columns:1fr minmax(250px,340px);gap:clamp(18px,2vw,28px);margin-top:clamp(40px,6vw,64px);align-items:start}
.fg-main{position:relative;overflow:hidden;background:#0c0e18;aspect-ratio:16/10;width:100%}
.fg-main img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.fg-main .fg-cap{position:absolute;left:0;right:0;bottom:0;padding:22px 24px;display:flex;justify-content:space-between;align-items:flex-end;gap:14px;font-family:var(--mono);font-size:11px;text-transform:uppercase;letter-spacing:.18em;color:var(--paper);background:linear-gradient(0deg,rgba(10,12,22,.72),transparent 70%)}
.fg-main .fg-cap .n{color:var(--orange)}
.fg-thumbs{display:flex;flex-direction:column;gap:10px;overflow-y:auto;min-height:0;padding-right:8px}
.fg-thumbs::-webkit-scrollbar{width:5px}
.fg-thumbs::-webkit-scrollbar-thumb{background:var(--orange)}
.fg-thumbs button{position:relative;flex:0 0 auto;width:100%;aspect-ratio:16/10;padding:0;border:0;overflow:hidden;background:#0c0e18;cursor:pointer}
.fg-thumbs button img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.fg-thumbs button:hover img{transform:scale(1.06)}
.fg-thumbs button.on{outline:2px solid var(--orange);outline-offset:-2px}
@media(max-width:1000px){.fg{grid-template-columns:1fr}.fg-main{aspect-ratio:16/9}.fg-thumbs{grid-template-columns:repeat(3,1fr);overflow:visible;max-height:none;padding-right:0}}

/* ---------- inquiry ---------- */
.inq{border-top:1px solid var(--line);background:var(--paper-2)}
.inq-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:clamp(32px,5vw,72px);align-items:start;margin-top:clamp(40px,6vw,64px)}
.values{margin-top:36px;display:flex;flex-direction:column;gap:18px}
.value{display:flex;gap:16px;align-items:flex-start}
.value .ck{flex-shrink:0;width:9px;height:9px;background:var(--ink);margin-top:7px}  /* ✓ 字形属 craft-floor 禁用项，改为实心方块 */
.value strong{display:block;font-weight:800;text-transform:uppercase;letter-spacing:.04em;font-size:1rem;margin-bottom:4px}
.value span{color:var(--muted);font-size:var(--fs-body);line-height:1.62}
.form{background:var(--paper);border:1px solid var(--line);padding:clamp(26px,3vw,40px)}
.field{margin-bottom:18px}
.field label{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.field input,.field select,.field textarea{width:100%;background:var(--paper-2);border:1px solid var(--line);
  padding:14px 16px;font-family:var(--sans);font-size:var(--fs-body);color:var(--ink);outline:none;transition:border-color .25s}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--orange)}
.field textarea{min-height:110px;resize:vertical}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%236C6F7B' stroke-width='1.5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 15px center}
.form .btn{width:100%;justify-content:center;margin-top:6px}
.note-msg{display:none;margin-top:14px;padding:14px 16px;font-size:15px;font-weight:700;border:1px solid var(--orange);color:var(--orange)}
.note-msg.show{display:block}

/* ---------- footer ---------- */
.footer{background:var(--navy);color:var(--paper)}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;padding:clamp(56px,7vw,90px) 0 50px}
.footer .brand .logo{display:block;margin-bottom:22px;cursor:default}
.footer .brand .logo:hover{padding-left:0}
.footer .brand .logo img{height:40px;width:auto;filter:brightness(0) invert(1)}
.footer .brand p{color:rgba(243,241,234,.66);font-size:var(--fs-body);max-width:38ch;line-height:1.7}
.footer .socials{display:flex;gap:10px;margin-top:26px;flex-wrap:wrap}
.footer .socials a{width:38px;height:38px;border:1px solid var(--line-2);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--paper);transition:.3s}
.footer .socials a:hover{border-color:var(--orange);color:var(--orange);transform:translateY(-2px)}
.footer .socials svg{width:16px;height:16px}
.fcol h4{font-family:var(--mono);font-size:10px;letter-spacing:.24em;text-transform:uppercase;color:var(--orange);margin-bottom:20px}
.fcol a{display:block;font-size:15.5px;color:rgba(243,241,234,.72);padding:6px 0;transition:.2s}
.fcol a:hover{color:#fff}
.fcol .contact{font-size:15.5px;color:rgba(243,241,234,.72);line-height:1.7;margin-top:8px}
.footer-bottom{border-top:1px solid var(--line-2);padding:22px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
.footer-bottom p,.footer-bottom a{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:rgba(243,241,234,.6)}
.footer-bottom a:hover{color:var(--orange)}

/* ---------- reveal ----------
   故意挂在 html.js 下：JS 被禁用/拦截时内容不会永远停在 opacity:0 */
.js .reveal{opacity:0;transform:translateY(28px);transition:opacity .8s cubic-bezier(.16,1,.3,1),transform .8s cubic-bezier(.16,1,.3,1)}
.js .reveal.vis{opacity:1;transform:none}
.d1{transition-delay:.08s}.d2{transition-delay:.16s}.d3{transition-delay:.24s}.d4{transition-delay:.32s}

/* ---------- responsive ---------- */
@media(max-width:1024px){
  nav.main{display:none}.burger{display:block}
  .lineup-grid{grid-template-columns:1fr;max-width:560px}
  .steps{grid-template-columns:1fr}.step{border-right:0;border-bottom:1px solid var(--line)}
  .oem-grid,.inq-grid{grid-template-columns:1fr;gap:40px}
  .oem-visual{position:static}
  .stats{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
  :root{--hh:64px}
  .hdr-cta .btn-ghost{display:none}
  /* hero 顶部 doc 行在窄屏放不下会溢出，并会撞上右上角 registration mark */
  .hero-top{font-size:9px;letter-spacing:.12em;top:calc(var(--hh) + 34px)}
  .hero h1{font-size:clamp(2.4rem,13vw,4rem)}
  .field-row{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr;gap:22px}
  .footer-top{grid-template-columns:1fr;gap:32px}
  .hero-foot{display:none}
}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
  .js .reveal{opacity:1;transform:none}
}