/* DFEC export-site prototype — shared stylesheet, v3 (2026-09-19): studio-white product imagery, near-black type,
   one blue accent, dark navy bands for rhythm, no hairline clutter. Mobile first. */
@font-face{font-family:"Sofia Sans";src:url("../fonts/sofia-sans-var.woff2") format("woff2");font-weight:100 900;font-display:swap}
@font-face{font-family:"Sofia Sans XC";src:url("../fonts/sofia-sans-extra-condensed-800.woff2") format("woff2");font-weight:800;font-display:swap}
@font-face{font-family:"Sofia Sans Fallback";src:local("Arial"),local("Liberation Sans");size-adjust:96.3%;ascent-override:93.5%;descent-override:31.2%;line-gap-override:0%}
@font-face{font-family:"Sofia Sans XC Fallback";src:local("Arial Narrow"),local("Liberation Sans Narrow");size-adjust:78.3%;ascent-override:115%;descent-override:38.3%;line-gap-override:0%}
:root{--paper:#F4F4F1;--white:#FFFFFF;--ink:#0F1418;--steel:#5B636B;--mute:#6B7079;--rule:#E3E5E1;--field:#8A9199;
--navy:#0E1B2B;--navy-2:#15263B;--on-navy:#C9D3E2;--signal:#004694;--signal-dark:#003573;--signal-wash:#E6EEF8;--amber-wash:#FBEFD3;--amber-line:#C98A1B;--amber-ink:#6F4506;--ok:#1E6B45;--err:#A12A1F;--chat:#0F7A43;
--sans:"Sofia Sans","Sofia Sans Fallback",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;--xc:"Sofia Sans XC","Sofia Sans XC Fallback","Arial Narrow","Roboto Condensed",var(--sans);
--r:4px;--r-card:8px;--shadow:0 1px 2px rgba(15,20,24,.04),0 10px 30px -12px rgba(15,20,24,.16);
/* 字号八档（2026-09-23 精修）：站上只用这八档，不再写零散的 rem */
--fs-1:.75rem;--fs-2:.875rem;--fs-3:1rem;--fs-4:1.125rem;--fs-5:1.5rem;--fs-6:clamp(1.5rem,2.6vw,2rem);--fs-7:clamp(2rem,4vw,2.75rem);--fs-8:clamp(2.5rem,5.4vw,4.25rem);
/* 段距两档、圆角两档 */
--space-block:clamp(3rem,5vw,4rem);--space-tight:clamp(2rem,4vw,3rem)}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:5rem}
body{margin:0;background:var(--paper);color:var(--ink);font:400 var(--fs-3)/1.6 var(--sans);display:flex;flex-direction:column;min-height:100vh}
main{flex:1 0 auto}
img{max-width:100%;height:auto;display:block}
a{color:var(--signal);text-underline-offset:.18em;text-decoration-thickness:1px}
a:hover{color:var(--signal-dark)}
:focus-visible{outline:3px solid var(--signal);outline-offset:2px}
.vh{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:0}
.skip:focus{left:1rem;top:1rem;z-index:40;background:var(--white);padding:.5rem .75rem}
.wrap{max-width:76rem;margin-inline:auto;padding-inline:clamp(1rem,4vw,3rem)}
.num{font-variant-numeric:tabular-nums}
h1,h2,h3,p{margin:0}
h1{font:800 var(--fs-7)/1.05 var(--sans);letter-spacing:-.02em}
h2{font:800 var(--fs-6)/1.15 var(--sans);letter-spacing:-.015em;margin-bottom:1rem}
h3{font:700 var(--fs-4)/1.3 var(--sans)}
.lede{max-width:56ch;color:var(--steel);font-size:var(--fs-4);line-height:1.5}
.muted{color:var(--steel)}
.label,.eyebrow{font:700 var(--fs-1)/1.2 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--steel)}
.eyebrow{margin-bottom:1rem}
.section{padding-block:var(--space-block)}
.section-white{background:var(--white)}
.section-navy{background:var(--navy);color:var(--white)}
.section-navy .eyebrow,.section-navy .muted{color:var(--on-navy)}
.section-navy h2{color:var(--white)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:.75rem 2rem;margin-bottom:2rem}
.section-head h2{margin:0}
.section-head>div p{margin-top:.5rem;max-width:52ch}
.section-head>a{display:inline-block;padding-block:.6rem;font-weight:600;text-decoration:none;white-space:nowrap}
.section-head>a::after{content:" →"}
.section-head>a:hover{text-decoration:underline}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:3rem;padding:.75rem 1.25rem;border:0;border-radius:var(--r);background:var(--signal);color:var(--white);font:600 var(--fs-3)/1 var(--sans);letter-spacing:.01em;text-decoration:none;cursor:pointer;transition:background .15s}
.btn:hover{background:var(--signal-dark);color:var(--white)}
.btn[disabled]{opacity:.6;cursor:progress}
.btn-ghost{background:none;color:var(--ink);border:1px solid var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--white)}
.section-navy .btn-ghost{color:var(--white)}
.section-navy .btn-ghost:hover{background:var(--white);color:var(--navy)}

/* header：单行吸顶（精修 C9）；手机是品牌行 + 搜索行，下滑时品牌行滑走、搜索行留住 */
.site-head{position:sticky;top:-3.75rem;z-index:30;background:var(--white);border-bottom:1px solid var(--rule)}
body.menu-open .site-head{top:0}
.head-row{display:grid;grid-template-columns:minmax(0,1fr) auto;grid-template-rows:3.75rem auto;grid-template-areas:"brand menu" "search search";align-items:center;gap:0 .75rem;padding-bottom:.6rem}
.brand{grid-area:brand;display:flex;align-items:center;min-height:2.75rem;text-decoration:none}
.brand img{height:2.25rem;width:auto}
.menu-btn{grid-area:menu;display:inline-flex;align-items:center;gap:.5rem;min-height:2.75rem;padding:.5rem .9rem;border:1px solid var(--ink);border-radius:var(--r);background:var(--white);color:var(--ink);font:600 var(--fs-2)/1 var(--sans);cursor:pointer}
.menu-btn::before{content:"";width:1.1rem;height:.8rem;background:linear-gradient(var(--ink) 0 2px,transparent 2px 5px,var(--ink) 5px 7px,transparent 7px 10px,var(--ink) 10px 12px)}
.menu-btn[aria-expanded="true"]{background:var(--signal-wash)}
.search{grid-area:search;position:relative;min-width:0;display:grid;grid-template-columns:minmax(0,1fr) 3rem;border-radius:var(--r)}
.search input{width:100%;min-height:3rem;font:inherit;font-size:var(--fs-3);padding:.65rem 1rem;border:1px solid var(--field);border-right:0;border-radius:var(--r) 0 0 var(--r);background:var(--white);color:var(--ink)}
.search input::placeholder{color:var(--mute)}
/* 激活：框线变蓝 + 整组（框 + 按钮）外一圈淡蓝，不再单给输入框套粗描边（2026-09-24 业务方指出） */
.search input:focus,.search-page .search input:focus,.hero-search .search input:focus{outline:0;border-color:var(--signal)}
.search:focus-within{box-shadow:0 0 0 3px rgba(0,70,148,.28)}
.search-go{display:inline-flex;align-items:center;justify-content:center;min-height:3rem;border:1px solid var(--signal);border-radius:0 var(--r) var(--r) 0;background:var(--signal);color:var(--white);cursor:pointer}
.search-go:hover{background:var(--signal-dark)}
.search-pop{position:absolute;left:0;right:0;top:calc(100% + .35rem);z-index:20;background:var(--white);border:1px solid var(--rule);border-radius:var(--r);box-shadow:0 18px 40px -16px rgba(15,20,24,.3);max-height:24rem;overflow:auto}
.search-pop ul{list-style:none;margin:0;padding:.25rem 0}
.search-pop li>*{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:0 .75rem;min-height:2.75rem;padding:.6rem .9rem;color:var(--ink);text-decoration:none;cursor:pointer}
.search-pop li[aria-selected="true"]>*,.search-pop li>*:hover{background:var(--signal-wash)}
.r-num{font:800 1.25rem/1.15 var(--xc);font-variant-numeric:tabular-nums}
.r-title{align-self:center;color:var(--steel)}
.r-note{grid-column:1/-1;font-size:var(--fs-2);color:var(--steel)}
.r-price{align-self:center;font-weight:700;white-space:nowrap}
.r-type .r-num{font:600 var(--fs-3)/1.3 var(--sans)}
.tag-stock{background:var(--ok);color:var(--white);margin-left:.4rem;vertical-align:.1em}
.search-hint{padding:.6rem .9rem;font-size:var(--fs-2);color:var(--steel)}
.search-hint:empty{display:none}
.head-cta{display:none}
.nav-lang{display:none}
/* 手机：抽屉 + 遮罩（C25） */
.site-nav{display:none}
.site-nav.open{display:block;position:fixed;left:0;right:0;bottom:0;top:var(--head-h,7.25rem);z-index:25;overflow:auto;background:var(--white);padding:.5rem 1rem 1.5rem;border-top:1px solid var(--rule)}
body.menu-open .chat-fab,body.menu-open .chat-panel{display:none}
.site-nav ul{list-style:none;margin:0;padding:0}
.site-nav a{display:flex;align-items:center;min-height:3rem;padding:.5rem 0;color:var(--ink);font-weight:600;text-decoration:none;border-bottom:1px solid var(--rule)}
.site-nav a[aria-current="page"]{color:var(--signal)}
.site-nav .nav-cta{padding:.9rem 0 .5rem}
.site-nav .nav-cta .btn{width:100%;color:var(--white);padding:.75rem 1.25rem;border-bottom:0;font-weight:600}
.nav-lang-m{padding:.85rem 0 .5rem;border-bottom:1px solid var(--rule)}
.nav-lang-label{display:block;margin-bottom:.6rem;font:700 var(--fs-1)/1 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--steel)}
.lang-chips{display:flex;flex-wrap:wrap;gap:.5rem;list-style:none;margin:0;padding:0}
.lang-chips button{min-height:2.75rem;padding:.5rem .9rem;border:1px solid var(--rule);border-radius:var(--r);background:var(--white);color:var(--ink);font:600 var(--fs-2)/1 var(--sans);cursor:pointer}
.lang-chips button:hover{border-color:var(--ink)}
.lang-chips button[aria-current="true"]{border-color:var(--ink);background:var(--ink);color:var(--white)}
@media (min-width:64rem){
  .site-head{top:0}
  .head-row{display:flex;gap:1.25rem;min-height:4.5rem;padding-block:.6rem}
  .head-row .search input,.head-row .search-go{min-height:2.75rem}
  .brand img{height:2.25rem}
  .menu-btn{display:none}
  .site-nav{display:block}
  .site-nav.open{position:static;padding:0;overflow:visible}
  .site-nav ul{display:flex;align-items:center;gap:0 1.1rem}
  .site-nav a{min-height:2.75rem;padding:.5rem 0;font-size:var(--fs-3);border-bottom:2px solid transparent;white-space:nowrap}
  .site-nav a:hover{border-bottom-color:currentColor}
  .site-nav a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--signal)}
  .site-nav .nav-lang-m,.site-nav .nav-cta{display:none}
  .head-row .search{flex:1 1 9rem;max-width:18rem;margin-left:auto}
  .head-cta{display:inline-flex;flex:none;min-height:2.75rem;padding:.6rem 1rem;font-size:var(--fs-2)}
}
@media (min-width:72rem){
  .head-row{gap:1.5rem}
  .site-nav ul{gap:0 1.5rem}
  .nav-lang{display:block;position:relative;flex:none}
  .lang summary{display:inline-flex;align-items:center;gap:.45rem;min-height:2.75rem;list-style:none;cursor:pointer;font:600 var(--fs-2)/1 var(--sans);color:var(--ink)}
  .lang summary::-webkit-details-marker{display:none}
  .lang summary svg{width:1.05rem;height:1.05rem;color:var(--steel)}
  .lang summary::after{content:"";width:.4rem;height:.4rem;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:translateY(-.12rem) rotate(45deg)}
  .lang[open] summary::after{transform:translateY(.12rem) rotate(225deg)}
  .lang-list{position:absolute;right:0;top:100%;z-index:25;min-width:11rem;margin:0;padding:.35rem 0;list-style:none;background:var(--white);border:1px solid var(--rule);border-radius:var(--r);box-shadow:0 18px 40px -16px rgba(15,20,24,.3)}
  .lang-list button{display:flex;width:100%;min-height:2.75rem;align-items:center;justify-content:space-between;gap:1rem;padding:.6rem .9rem;border:0;background:none;color:var(--ink);font:400 var(--fs-3)/1.2 var(--sans);text-align:left;cursor:pointer}
  .lang-list button:hover{background:var(--signal-wash)}
  .lang-list button[aria-current="true"]{font-weight:700}
  .lang-list button[aria-current="true"]::after{content:"✓";color:var(--signal)}
}

/* breadcrumbs */
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:0 .5rem;font-size:var(--fs-2);color:var(--steel)}
.crumbs li+li::before{content:"/";margin-right:.5rem;color:var(--mute)}
.crumbs a{display:inline-block;padding-block:.7rem;color:var(--steel)}
.crumbs li{display:inline-flex;align-items:center}
.crumbs li[aria-current]{padding-block:.7rem}
.page-head .crumbs+h1,.hero .id-row{margin-top:.5rem}

/* home: hero */
.hero-home{background:var(--white);padding-block:var(--space-tight) 0;overflow:hidden}
.hero-grid2{display:grid;gap:2.5rem;padding-bottom:clamp(1.5rem,3vw,2.5rem)}
@media (min-width:60rem){.hero-grid2{grid-template-columns:minmax(0,6fr) minmax(0,6fr);gap:3rem;align-items:center}}
.hero-text h1{font-size:var(--fs-8);max-width:14ch}
.hero-text .lede{margin-top:1.25rem}
.hero-search{margin-top:2rem;max-width:34rem}
.hero-search .search input{font-size:var(--fs-4);padding:.9rem 1.1rem;border-color:var(--ink)}
.hero-search .search input::placeholder{color:var(--mute)}
.by-engine{margin-top:1.1rem}
.by-engine-label{margin:0 0 .6rem;font:700 var(--fs-1)/1 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--steel)}
.chips{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.5rem}
.chips a{display:inline-flex;align-items:center;min-height:2.75rem;padding:.5rem .9rem;border:1px solid var(--rule);border-radius:var(--r);background:var(--white);color:var(--ink);font:600 var(--fs-2)/1 var(--sans);text-decoration:none;white-space:nowrap}
.chips a:hover{border-color:var(--ink)}
.chips a.chip-all{border-color:var(--signal);color:var(--signal)}
.chips a.chip-all:hover{background:var(--signal);color:var(--white)}
.assure{list-style:none;margin:2rem 0 0;padding:1.1rem 0 0;border-top:1px solid var(--rule);display:flex;flex-direction:column;gap:.8rem;font:600 var(--fs-3)/1.3 var(--sans);color:var(--ink)}
.assure li{display:flex;align-items:center;gap:.7rem}
.assure svg{flex:none;color:var(--steel)}
.assure b{color:var(--ink)}
.assure .assure-key{color:var(--ink)}
.assure .assure-key svg{color:var(--signal)}
.assure-wrap{padding-bottom:clamp(1.75rem,3.5vw,2.75rem)}
.assure-wrap .assure{margin:0;padding-top:1.25rem}
@media (min-width:48rem){.assure-wrap .assure{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem 2rem}}
.assure-note{display:flex;align-items:center;gap:.5rem;margin-top:-.75rem;font:600 var(--fs-2)/1.3 var(--sans);color:var(--steel)}
.assure-note svg{color:var(--signal)}
.hero-visual{margin:0}
.hero-visual img{width:100%;height:auto}
.hero-visual figcaption{margin-top:.5rem;font-size:var(--fs-2);color:var(--steel);text-align:right}
.stats-band{background:var(--navy);color:var(--white)}
.stats{display:grid;grid-template-columns:minmax(0,1fr);gap:1.5rem 2rem;margin:0;padding-block:clamp(1.75rem,4vw,2.75rem)}
@media (min-width:40rem){.stats{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:60rem){.stats{grid-template-columns:repeat(4,minmax(0,1fr))}}
.stats div{display:flex;flex-direction:column;padding-left:1rem;border-left:1px solid rgba(255,255,255,.18)}
.stats dd{order:-1;margin:0;font:800 clamp(2.25rem,5vw,3.25rem)/1 var(--xc);font-variant-numeric:tabular-nums;letter-spacing:.01em}
.stats dt{margin-top:.4rem;color:var(--on-navy);font-size:var(--fs-3)}

/* home: category tiles, cards */
.cat-tiles{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.25rem .75rem}
@media (min-width:40rem){.cat-tiles{grid-template-columns:repeat(4,minmax(0,1fr));gap:1.5rem 1rem}}
@media (min-width:60rem){.cat-tiles{grid-template-columns:repeat(6,minmax(0,1fr));gap:1.75rem 1.25rem}}
.cat-tiles a{display:block;color:var(--ink);text-decoration:none}
.cat-tiles img,.cat-blank{display:block;width:100%;aspect-ratio:1/1;object-fit:contain;background:var(--white);border:1px solid var(--rule);border-radius:var(--r-card);transition:border-color .18s,box-shadow .18s}
.cat-tiles a:hover img{border-color:var(--ink);box-shadow:var(--shadow)}
.cat-blank{border-style:dashed}
.cat-name{display:block;margin-top:.7rem;font-weight:700;font-size:var(--fs-3);line-height:1.25}
.cat-count{display:block;margin-top:.15rem;font-size:var(--fs-2);color:var(--steel)}
.cat-tiles-all{grid-template-columns:repeat(3,minmax(0,1fr))}
@media (min-width:48rem){.cat-tiles-all{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media (min-width:60rem){.cat-tiles-all{grid-template-columns:repeat(6,minmax(0,1fr))}}
.cards{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}
@media (min-width:48rem){.cards{grid-template-columns:repeat(4,minmax(0,1fr));gap:1.25rem}}
.card{display:block;height:100%;color:var(--ink);text-decoration:none;background:var(--white);border:1px solid var(--rule);border-radius:var(--r-card);padding:1rem;transition:transform .18s,box-shadow .18s,border-color .18s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:transparent}
.card figure{margin:0}
.card img{aspect-ratio:1/1;object-fit:contain;width:100%;padding:6%;border-radius:var(--r);background:var(--white)}
.card figcaption{padding-top:.8rem}
.card .c-num{display:block;font:800 1.375rem/1.1 var(--xc);font-variant-numeric:tabular-nums;letter-spacing:.01em}
.card .c-title{display:block;color:var(--steel);font-size:var(--fs-3);margin-top:.15rem}
.card .c-price{display:block;margin-top:.4rem;font-weight:700;font-size:var(--fs-3)}
.card .c-price .muted{font-weight:500}
@media (max-width:40rem){.card .c-price .muted{display:block;font-size:var(--fs-2);font-weight:400}}

/* home: engine families */
.fam-list{list-style:none;margin:0;padding:0;display:grid;border-top:1px solid var(--rule)}
@media (min-width:60rem){.fam-list{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:3rem}}
.fam-list a{display:grid;grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"label count" "engines count";column-gap:1rem;align-items:center;padding:.85rem .5rem;margin-inline:-.5rem;border-bottom:1px solid var(--rule);color:var(--ink);text-decoration:none;transition:background .15s}
.fam-list a:hover{background:var(--signal-wash)}
.fam-label{grid-area:label;font:800 1.375rem/1.1 var(--xc);letter-spacing:.02em}
.fam-engines{grid-area:engines;margin-top:.2rem;font-size:var(--fs-3);color:var(--steel)}
.fam-count{grid-area:count;font-size:var(--fs-2);color:var(--steel);white-space:nowrap}
.fam-list-page a{padding:1.1rem .5rem}
@media (max-width:40rem){.fam-list a{grid-template-areas:"label" "engines" "count";column-gap:0}.fam-count{margin-top:.2rem}}

/* home: catalog pitch, why band, brands, news */
.split{display:grid;gap:2rem}
@media (min-width:60rem){.split{grid-template-columns:minmax(0,6fr) minmax(0,6fr);gap:4rem;align-items:center}}
.split p{max-width:50ch;color:var(--steel);font-size:var(--fs-4)}
.split p+p{margin-top:.85rem}
.split .links{margin-top:1.5rem;display:flex;flex-wrap:wrap;align-items:center;gap:1rem 1.5rem;max-width:none;color:inherit}
.split .links a:not(.btn){display:inline-block;padding-block:.6rem;font-weight:600}
.part-preview{display:block;padding:1.5rem;background:var(--white);border:1px solid var(--rule);border-radius:var(--r-card);color:var(--ink);text-decoration:none;transition:border-color .18s,box-shadow .18s}
.part-preview:hover{border-color:var(--ink);box-shadow:var(--shadow);color:var(--ink)}
.pp-label{display:block;margin-bottom:1rem;font:400 var(--fs-2)/1.4 var(--sans);color:var(--steel)}
.pp-head{display:flex;align-items:center;gap:1rem}
.pp-head img{flex:none;width:5.5rem;height:5.5rem;object-fit:contain;padding:6%;border:1px solid var(--rule);border-radius:var(--r);background:var(--white)}
.pp-num{display:block;font:800 1.875rem/1 var(--xc);letter-spacing:.01em}
.pp-title{display:block;margin-top:.3rem;font-weight:700}
.pp-facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.9rem 1.5rem;margin:1.25rem 0 0;padding-top:1.1rem;border-top:1px solid var(--rule)}
.pp-facts div{margin:0}
.pp-facts dt{font:700 var(--fs-1)/1.3 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--steel)}
.pp-facts dd{margin:.15rem 0 0;font-weight:700;font-variant-numeric:tabular-nums}
.pp-cta{display:block;margin-top:1.25rem;font-weight:600;color:var(--signal)}
.why-grid{display:grid;gap:2rem;margin:0}
@media (min-width:48rem){.why-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:2.5rem 3rem}}
@media (min-width:60rem){.why-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.why-grid div{padding-top:1rem;border-top:1px solid rgba(255,255,255,.18)}
.why-grid dt{font:700 var(--fs-4)/1.25 var(--sans);color:var(--white)}
.why-grid dd{margin:.6rem 0 0;color:var(--on-navy);font-size:var(--fs-3)}
.logo-wall{margin-top:clamp(2.5rem,5vw,3.5rem)}
.logo-wall-label{margin:0 0 1rem;font:700 var(--fs-1)/1 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--on-navy)}
.logo-wall ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.75rem}
@media (min-width:48rem){.logo-wall ul{grid-template-columns:repeat(5,minmax(0,1fr))}}
@media (min-width:60rem){.logo-wall ul{grid-template-columns:repeat(7,minmax(0,1fr));gap:1rem}}
.logo-wall li{display:flex;align-items:center;justify-content:center;height:4.75rem;padding:.9rem 1.1rem;border:1px solid rgba(255,255,255,.14);border-radius:var(--r)}
.logo-wall img{display:block;max-width:100%;max-height:2.4rem;width:auto;height:auto;filter:brightness(0) invert(1);opacity:.88;transition:opacity .15s}
.logo-wall li:hover img{opacity:1}
.news-cards{list-style:none;margin:0;padding:0;display:grid;gap:1.5rem}
@media (min-width:48rem){.news-cards{grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem}}
.news-cards a{display:block;color:var(--ink);text-decoration:none}
.news-cards img,.nc-blank{display:block;width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-card);background:var(--white);transition:opacity .18s}
.news-cards a:hover img{opacity:.88}
.nc-meta{display:flex;align-items:baseline;gap:.75rem;margin-top:.9rem}
.news-cards time{font:800 1rem/1.2 var(--xc);letter-spacing:.02em}
.news-cards .n-kind{font-size:var(--fs-2);color:var(--steel)}
.news-cards .n-title{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-top:.4rem;font-weight:700;font-size:var(--fs-4);line-height:1.35;letter-spacing:-.01em}
.news-cards a:hover .n-title{color:var(--signal)}
.news-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule)}
.news-list li>*{display:grid;grid-template-columns:minmax(0,1fr);gap:.2rem;padding:1.1rem 0;border-bottom:1px solid var(--rule);color:var(--ink);text-decoration:none}
@media (min-width:48rem){.news-list li>*{grid-template-columns:10rem minmax(0,1fr);grid-template-areas:"time title" "kind sum";column-gap:2rem}.news-list time{grid-area:time}.news-list .n-kind{grid-area:kind}.news-list .n-title{grid-area:title}.news-list .n-sum{grid-area:sum}}
.news-list time{font:800 1.125rem/1.2 var(--xc);color:var(--ink);letter-spacing:.02em}
.news-list .n-kind{font-size:var(--fs-2);color:var(--steel)}
.news-list .n-title{font-weight:700;font-size:var(--fs-4);letter-spacing:-.01em}
.news-list .n-sum{color:var(--steel);font-size:var(--fs-3);max-width:70ch}
.news-list a:hover .n-title{color:var(--signal)}
.news-list .planned .n-date{font:600 var(--fs-3)/1.2 var(--sans);color:var(--steel)}
@media (min-width:48rem){.news-list .n-date{grid-area:time}}
.about-teaser p{max-width:52ch;font-size:var(--fs-4)}
.about-grid{align-items:center}
.photo-mosaic{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem}
.photo-mosaic li:first-child{grid-column:1/-1}
.photo-mosaic img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-card);background:var(--paper)}
.photo-mosaic li:first-child img{aspect-ratio:16/9}
.about-teaser p+p{margin-top:.85rem}

/* category index & listing (part types) */
.groups{display:grid;gap:0 3rem}
.groups .col>div{margin-bottom:1.5rem}
@media (min-width:48rem){.groups{grid-template-columns:repeat(3,minmax(0,1fr))}}
.groups h2{font:700 var(--fs-1)/1.2 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--steel);border-bottom:1px solid var(--rule);padding-bottom:.5rem;margin-bottom:.5rem;scroll-margin-top:5rem}
.letter-chips{margin-top:1.25rem}.letter-chips a{min-width:2.75rem;justify-content:center;padding-inline:.5rem}
.groups ul{list-style:none;margin:0;padding:0}
.groups li a{display:flex;justify-content:space-between;gap:1rem;min-height:2.75rem;align-items:center;color:var(--ink);text-decoration:none;border-bottom:1px solid var(--rule)}
.groups li a:hover{color:var(--signal)}
.groups li a span{color:var(--steel);font-size:var(--fs-2);font-variant-numeric:tabular-nums}
.list{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule)}
.list li>*{display:grid;grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"num flag" "title flag";gap:0 1rem;align-items:center;padding:.75rem 0;border-bottom:1px solid var(--rule);color:var(--ink);text-decoration:none}
.list .l-num{grid-area:num;font:800 1.375rem/1.1 var(--xc);font-variant-numeric:tabular-nums;letter-spacing:.01em}
.list .l-title{grid-area:title;color:var(--steel);font-size:var(--fs-3)}
.list .l-flag{grid-area:flag;font-size:var(--fs-2);font-weight:600;color:var(--steel);white-space:nowrap}
.list .l-flag.none{color:var(--mute);font-weight:400}
.list li a:hover .l-num{color:var(--signal)}
.list li a:hover{background:var(--signal-wash);box-shadow:0 0 0 .5rem var(--signal-wash)}
.list .l-flag.price{font-weight:700;color:var(--ink)}
.type-stock{margin-bottom:var(--space-tight)}
.section-head .stock-links{display:flex;flex-wrap:wrap;gap:.25rem 1.5rem;margin:0}
.section-head .stock-links a{display:inline-block;padding-block:.6rem;font-weight:500;text-decoration:underline;text-underline-offset:.2em;white-space:nowrap}
.list-h{margin-bottom:1rem}
@media (min-width:48rem){.list li>*{grid-template-columns:11rem minmax(0,1fr) auto;grid-template-areas:"num title flag"}}
.pager{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.75rem;margin-top:1.5rem}
.pager p{color:var(--steel)}
.pager nav{display:flex;gap:.5rem}
.pager .btn{min-height:2.75rem}
.pager .btn-ghost[aria-disabled="true"]{opacity:.4;pointer-events:none}
.pager nav{align-items:center;flex-wrap:wrap}
.pager .pages{list-style:none;margin:0;padding:0;display:flex;gap:.25rem}
.pager .pages li>*{display:inline-flex;align-items:center;justify-content:center;min-width:2.75rem;min-height:2.75rem;padding:0 .5rem;border-radius:var(--r);font-weight:600;text-decoration:none;color:var(--ink)}
.pager .pages a:hover{background:var(--signal-wash)}
.pager .pages [aria-current="page"]{background:var(--ink);color:var(--white)}
.pager .pages .gap{color:var(--mute);min-width:1.5rem}
@media (max-width:40rem){.pager .pages li:not(:first-child):not(:last-child):not(.gap):not(:has([aria-current])){display:none}}
.pager-note{margin-top:1.5rem}

/* products & engine pages */
.group-h{margin-top:2.5rem;font-size:var(--fs-5);letter-spacing:-.01em;scroll-margin-top:5rem}
.group-h .muted{font-weight:400;font-size:var(--fs-2);margin-left:.4rem}
.pcards{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}
@media (min-width:40rem){.pcards{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (min-width:60rem){.pcards{grid-template-columns:repeat(4,minmax(0,1fr));gap:1.25rem}}
.pcards a,.pcards .p-nopage{display:flex;flex-direction:column;height:100%;color:var(--ink);text-decoration:none;background:var(--white);border:1px solid var(--rule);border-radius:var(--r-card);padding:.9rem;transition:transform .18s,box-shadow .18s,border-color .18s}
.pcards a:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:transparent}
.pcards img,.p-blank{display:block;flex:none;width:100%;aspect-ratio:1/1;object-fit:contain;padding:6%;border-radius:var(--r);background:var(--white);border:1px solid var(--rule)}
.p-blank{background:var(--rule);border-color:transparent}
.pcards img{border-color:transparent}
/* 分组页顶上的子类型芯片（2026-09-24）：黑底的是当前 */
.sub-chips{margin:0 0 1.5rem;flex-wrap:wrap}
.sub-chips a span{margin-left:.4rem;color:var(--steel);font-weight:400}
.sub-chips a.is-on,.sub-chips a.chip-all.is-on{background:var(--ink);color:var(--white);border-color:var(--ink)}
.sub-chips a.is-on span{color:var(--on-navy)}
.pcards+.pager{margin-top:2rem}
.p-num{display:block;margin-top:.7rem;font:800 1.25rem/1.1 var(--xc);font-variant-numeric:tabular-nums;letter-spacing:.01em;overflow-wrap:anywhere}
.p-title{display:block;font-size:var(--fs-3);color:var(--steel);margin-top:.15rem}
.p-price{display:block;margin-top:auto;padding-top:.35rem;font-weight:700;font-size:var(--fs-3)}
.p-price .muted{font-weight:500}
.dl-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule);max-width:44rem}
.dl-list li{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem 1rem;padding:.85rem 0;border-bottom:1px solid var(--rule)}
.dl-tag{font:400 var(--fs-2)/1 var(--sans);padding:.35rem .5rem;border:1px solid var(--rule);border-radius:var(--r);color:var(--steel)}
.dl-name{font-weight:700;flex:1 1 14rem}

/* part page */
.hero{padding-block:var(--space-tight) var(--space-block)}
.id-row{display:flex;align-items:flex-start;justify-content:space-between;gap:1rem}
.pn{display:block;font:800 clamp(2.5rem,5vw,3.5rem)/.95 var(--xc);letter-spacing:-.005em;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.pn-name{display:block;margin-top:.4rem;font:700 var(--fs-5)/1.2 var(--sans);letter-spacing:-.01em}
.copy{flex:none;display:inline-flex;align-items:center;gap:.45rem;min-height:2.75rem;margin-top:.35rem;padding:0 .8rem;border:1px solid var(--ink);border-radius:var(--r);background:none;color:var(--ink);font:600 var(--fs-2)/1 var(--sans);cursor:pointer}
.copy svg{width:1rem;height:1rem}
.copy:hover{background:var(--ink);color:var(--white)}
.hero-grid{display:flex;flex-direction:column;gap:1.5rem;margin-top:.5rem}
.gallery{order:5}
.cta-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem}
.cta-row .btn{width:100%}
.facts{display:flex;flex-direction:column;gap:1.25rem}
@media (min-width:60rem){.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);align-items:start;gap:3rem}.gallery{order:0}.hero-grid.no-gallery{grid-template-columns:minmax(0,6fr) minmax(0,6fr);gap:4rem}.no-gallery .spec-col{padding-top:.4rem}}
/* 没有照片的件号页（2026-09-28）：左栏号、名、价、按钮，右栏规格表；手机上规格表照旧接在按钮下面 */
.spec-col{margin-top:.25rem}
.gallery-main{aspect-ratio:1/1;overflow:hidden;border-radius:var(--r-card);background:var(--white);border:1px solid var(--rule)}
.gallery-main img{width:100%;height:100%;object-fit:contain}
.thumbs{list-style:none;margin:.75rem 0 0;padding:0;display:grid;grid-template-columns:repeat(5,minmax(0,5.5rem));gap:.6rem}
.thumbs button{display:block;width:100%;padding:0;border:0;border-radius:var(--r);background:var(--white);overflow:hidden;cursor:pointer;box-shadow:0 0 0 1px var(--rule)}
.thumbs button[aria-pressed="true"]{box-shadow:0 0 0 2px var(--white),0 0 0 4px var(--signal)}
.thumbs button:focus-visible{outline:3px solid var(--signal);outline-offset:2px}
.thumbs img{width:100%;aspect-ratio:1/1;object-fit:cover}
.notice{padding:1rem 1.1rem;border-left:4px solid var(--amber-line);border-radius:0 var(--r) var(--r) 0;background:var(--amber-wash);color:var(--amber-ink)}
.notice a{color:var(--amber-ink);font-weight:700}
.replaces{color:var(--steel)}
.price-label{font:700 var(--fs-1)/1.2 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--steel)}
.price-value{margin-top:.3rem;font:800 clamp(2.75rem,6vw,3.5rem)/1 var(--xc);font-variant-numeric:tabular-nums;letter-spacing:.01em}
.price-value span{margin-left:.45rem;font:500 var(--fs-3)/1 var(--sans);color:var(--steel);letter-spacing:0}
.price-note{margin-top:.6rem;max-width:36ch;font-size:var(--fs-2);color:var(--steel)}
.keyfacts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem 1rem;margin:0;padding-top:1.25rem;border-top:1px solid var(--rule)}
.keyfacts dt{font:700 var(--fs-1)/1.2 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--steel)}
.keyfacts dd{margin:.15rem 0 0;font-size:var(--fs-4);font-weight:700}
.details{display:grid;gap:var(--space-block);padding-block:var(--space-block);border-top:1px solid var(--rule)}
@media (min-width:60rem){.details{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}}
.details>:only-child{grid-column:1/-1}
.spec{margin:0}
.spec div{display:grid;grid-template-columns:minmax(7.5rem,11rem) minmax(0,1fr);gap:1rem;padding:.75rem 0;border-bottom:1px solid var(--rule)}
.spec div:first-child{border-top:1px solid var(--rule)}
.spec dt{color:var(--steel)}
.spec dd{margin:0;font-weight:700;overflow-wrap:anywhere}
.details .lede{margin:-.35rem 0 1.4rem;max-width:52ch;font-size:var(--fs-3)}
/* 替代历史（2026-09-24 定版）：一句话 + 按钮的头，下面全宽四列表；号用极窄体，现行号蓝标，当前页琥珀底 */
.hist-head{align-items:flex-end}
.hist-head>div p{max-width:60ch}
.hist-head>a.btn{display:inline-flex;padding:.75rem 1.25rem;font-weight:600;text-decoration:none}
.hist-link{margin-top:1.25rem;font-size:var(--fs-2)}
/* A table wider than the screen scrolls inside its box instead of widening the page.
   .history is a grid item (min-width:auto by default): let it shrink, or the box grows with the table. */
.history{min-width:0}
.lineage-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.lineage-table{width:100%;border-collapse:collapse;border-top:2px solid var(--ink)}
.lineage-table th{padding:.65rem .75rem .65rem .75rem;text-align:left;font:500 var(--fs-2)/1.3 var(--sans);color:var(--steel);border-bottom:1px solid var(--rule)}
.lineage-table th:nth-child(1){width:30%}.lineage-table th:nth-child(2){width:30%}.lineage-table th:nth-child(3){width:22%}
.lineage-table td{padding:.8rem .75rem .8rem .75rem;border-bottom:1px solid var(--rule);vertical-align:middle;color:var(--steel)}
.lineage-table td.num{font:800 1.375rem/1.1 var(--xc);letter-spacing:.01em;color:var(--ink);white-space:nowrap}
.lineage-table td.num a{color:var(--signal);text-decoration:none}
.lineage-table td.num a:hover{text-decoration:underline}
.lineage-table td.num .tag{margin-left:.5rem;vertical-align:.2em}
.lineage-table td.date{white-space:nowrap}
.lineage-table td.to{font:700 1.125rem/1.1 var(--xc);letter-spacing:.01em;color:var(--ink);white-space:nowrap}
.lineage-table .dash{color:var(--field)}
.lineage-table .row-this td{background:var(--amber-wash);color:var(--amber-ink)}
.lineage-table .row-this td:first-child{box-shadow:inset 4px 0 0 var(--amber-line)}
.lineage-table .row-this td.to{color:var(--amber-ink)}
.lineage-table .row-latest td{color:var(--ink)}
.tag{display:inline-block;padding:.2rem .5rem;border-radius:var(--r);font:600 .8125rem/1.2 var(--sans);vertical-align:middle}
.tag-latest{background:var(--signal);color:var(--white)}
.tag-this{background:var(--amber-ink);color:var(--white)}
@media (max-width:40rem){.lineage-table .col-name{display:none}.lineage-table th:nth-child(n){width:auto}.lineage-table th,.lineage-table td{padding-left:.5rem;padding-right:.5rem}.lineage-table td.num{font-size:1.25rem}.lineage-table td.num .tag{display:block;margin:.35rem 0 0}.lineage-table td.date{white-space:normal}}
.aside-link{margin-top:.9rem;font-size:var(--fs-2)}
.about{padding-block:var(--space-block)}
.related{padding-block:var(--space-block)}
/* 件号页：规格表接在按钮下面（2026-09-24 业务方选定），第二段只剩替代历史 */
.spec-side{margin-top:.25rem}
.spec-side div{grid-template-columns:minmax(7rem,9rem) minmax(0,1fr);padding:.6rem 0}
.details>:only-child{max-width:none}
.about p{max-width:62ch;font-size:var(--fs-4)}

/* quote form */
.quote{background:var(--white);border-top:1px solid var(--rule)}
.quote-grid{display:grid;gap:clamp(1.5rem,4vw,3rem);padding-block:var(--space-block)}
@media (min-width:60rem){.quote-grid{grid-template-columns:minmax(0,4fr) minmax(0,7fr);gap:4rem}}
.quote-intro p{max-width:40ch;color:var(--steel)}
.quote-intro p+p{margin-top:.85rem}
.quote-form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem 1.25rem}
@media (max-width:40rem){.quote-form{grid-template-columns:minmax(0,1fr)}}
.field{display:flex;flex-direction:column;gap:.4rem;min-width:0}
.field-wide{grid-column:1/-1}
.field label{font-size:var(--fs-2);font-weight:600}
.req{color:var(--err);font-weight:700}
.req-note{font-size:var(--fs-2);color:var(--steel)}
.field-msg{margin:0;font-size:var(--fs-2);color:var(--err)}
.field-msg[hidden]{display:none}
.field-error input,.field-error textarea{border-color:var(--err);box-shadow:inset 0 0 0 1px var(--err)}
@media (max-width:40rem){.form-foot .btn{width:100%}}
.field input,.field textarea{width:100%;padding:.75rem .85rem;border:1px solid var(--field);border-radius:var(--r);background:var(--white);color:var(--ink);font:inherit;font-size:var(--fs-3)}
.field textarea{resize:vertical}
.field input:focus,.field textarea:focus{outline:3px solid var(--signal);outline-offset:0;border-color:var(--signal)}
.hp{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}
.form-foot{display:flex;flex-wrap:wrap;align-items:center;gap:1rem}
.form-status{font-weight:700}
.form-status[data-state="ok"]{color:var(--ok)}
.form-status[data-state="err"]{color:var(--err)}
.privacy{font-size:var(--fs-2);color:var(--steel)}

/* fixed pages, articles, search, 404 */
.page-head{padding-block:var(--space-tight) 1.5rem}
.page-head .lede{margin-top:1rem}
.prose{padding-bottom:var(--space-block)}
.prose>:not(.photo-strip){max-width:66ch}
.prose h2{margin-top:2.25rem;font-size:var(--fs-5)}
.prose h3{margin-top:1.5rem;margin-bottom:.4rem}
.prose p{margin-top:.85rem}
.prose .lede{max-width:58ch}
.prose ul,.prose ol{margin:.85rem 0 0;padding-left:1.25rem}
.prose li{margin-top:.4rem}
.prose li::marker{color:var(--steel)}
.prose table{width:100%;border-collapse:collapse;margin-top:.85rem;font-size:var(--fs-3)}
.prose th,.prose td{text-align:left;padding:.6rem .5rem;border-bottom:1px solid var(--rule);vertical-align:top}
.prose th{color:var(--steel);font:700 var(--fs-1)/1.3 var(--sans);letter-spacing:.08em;text-transform:uppercase}
.prose dl div{padding:.7rem 0;border-bottom:1px solid var(--rule)}
.prose dt{font-weight:700}
.prose dd{margin:.25rem 0 0;color:var(--steel)}
.draft{margin-top:1rem;padding:.75rem 1rem;border-left:4px solid var(--amber-line);border-radius:0 var(--r) var(--r) 0;background:var(--amber-wash);color:var(--amber-ink);font-size:var(--fs-2)}
.draft strong{font-weight:700}
.article-meta{display:flex;flex-wrap:wrap;gap:.5rem 1rem;margin-top:.85rem;font-size:var(--fs-2);color:var(--steel)}
.article-meta>*+*::before{content:"·";margin-right:1rem;color:var(--mute)}
.post-figure{margin:0 0 1.5rem}
.post-figure img{border-radius:var(--r-card);width:100%}
.post-figure figcaption{margin-top:.5rem;font-size:var(--fs-2);color:var(--steel)}
.post-gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem;margin-top:1.5rem}
.post-gallery img{border-radius:var(--r-card);width:100%;height:auto}
.search-page{padding-bottom:var(--space-block)}
.search-page .search-anchor,.search-page ul.tips{max-width:34rem}
.search-page .search{margin-top:1.25rem}
.search-page .search input{font-size:var(--fs-4);padding:.9rem 1.1rem;border-color:var(--ink)}
/* 搜索页的建议也浮动（2026-09-24 业务方定），不把下面的提示撑开；没搜到那块同样浮在框下 */
.search-page .search-pop{max-height:min(60vh,34rem)}
.search-anchor{position:relative}
.search-empty{position:absolute;left:0;right:0;top:calc(100% + .35rem);z-index:20;margin:0;padding:1.25rem;border:1px solid var(--rule);border-radius:var(--r);background:var(--white);box-shadow:0 18px 40px -16px rgba(15,20,24,.3)}
.search-empty .btns{display:flex;flex-wrap:wrap;gap:.5rem;margin:.9rem 0 0}
.search-page ul.tips{margin:1.5rem 0 0;padding-left:1.25rem;color:var(--steel)}
.search-page ul.tips li{margin-top:.4rem}
.notfound{padding-block:var(--space-block);max-width:40rem}
.notfound .lede{margin-top:.75rem}
.notfound .links{margin-top:1.5rem}
.notfound .code{font:800 clamp(5rem,20vw,9rem)/.9 var(--xc);color:var(--rule)}
.notfound .search{margin-top:1.5rem}

/* 聊天按钮与面板（C18）：所有尺寸都显示；件号页手机端由底部固定条接管 */
.chat-fab{position:fixed;right:1rem;bottom:calc(1rem + env(safe-area-inset-bottom));z-index:30;width:3.5rem;height:3.5rem;border:0;border-radius:50%;background:var(--chat);color:var(--white);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 8px 24px rgba(15,20,24,.24)}
.chat-fab:hover{background:#0C6236}
@media (max-width:60rem){body:has([data-sticky-bar]) .chat-fab{display:none}.chat-fab{transition:transform .2s,opacity .2s}body.fab-hide .chat-fab{transform:translateY(6rem);opacity:0}.site-foot{padding-bottom:5.5rem}}
@media (min-width:60rem) and (max-width:76rem){.chat-fab{width:2.75rem;height:2.75rem;right:.25rem}}
.chat-panel{position:fixed;right:1rem;bottom:calc(5rem + env(safe-area-inset-bottom));z-index:31;width:min(20rem,calc(100vw - 2rem));padding:.5rem;background:var(--white);border:1px solid var(--rule);border-radius:var(--r-card);box-shadow:0 18px 40px -16px rgba(15,20,24,.3)}
.chat-panel[hidden]{display:none}
.chat-title{padding:.5rem .75rem;font:700 var(--fs-1)/1.2 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--steel)}
.chat-panel a{display:flex;flex-direction:column;gap:.1rem;min-height:2.75rem;padding:.6rem .75rem;border-radius:var(--r);color:var(--ink);text-decoration:none}
.chat-panel a:hover{background:var(--signal-wash);color:var(--ink)}
.chat-name{font-weight:700}
.chat-sub{font-size:var(--fs-2);color:var(--steel)}
.chat-note{padding:.5rem .75rem .25rem;font-size:var(--fs-2);color:var(--steel)}
/* 件号页手机底部固定条（C7） */
.sticky-bar{position:fixed;left:0;right:0;bottom:0;z-index:32;display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:.75rem;align-items:center;padding:.5rem 1rem calc(.5rem + env(safe-area-inset-bottom));background:var(--white);border-top:1px solid var(--rule);box-shadow:0 -8px 24px rgba(15,20,24,.08)}
.sticky-bar[hidden]{display:none}
.sb-price{font:800 1.25rem/1 var(--xc);font-variant-numeric:tabular-nums;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sticky-bar .btn{min-height:2.75rem;padding:.6rem 1rem;font-size:var(--fs-2)}
.sb-chat{width:2.75rem;height:2.75rem;border:1px solid var(--rule);border-radius:var(--r);background:var(--white);color:var(--chat);display:inline-flex;align-items:center;justify-content:center;cursor:pointer}
body.bar-open{padding-bottom:4.5rem}
body.bar-open .chat-fab{display:none}
body.bar-open .chat-panel{bottom:calc(5.5rem + env(safe-area-inset-bottom))}
@media (min-width:60rem){.sticky-bar{display:none}body.bar-open{padding-bottom:0}body.bar-open .chat-fab{display:inline-flex}}
/* 询盘表单：ESN 与留言折叠，承诺放按钮下（C17） */
.more-fields{margin-top:.25rem}
.more-fields summary{list-style:none;cursor:pointer;display:inline-flex;align-items:center;min-height:2.75rem;font-weight:600;color:var(--signal)}
.more-fields summary::-webkit-details-marker{display:none}
.more-fields summary::before{content:"+";margin-right:.5rem;font-weight:400}
.more-fields[open] summary::before{content:"–"}
.more-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem 1.25rem;margin-top:.75rem}
@media (max-width:40rem){.more-grid{grid-template-columns:minmax(0,1fr)}}
.promise{display:flex;align-items:center;gap:.5rem;font-size:var(--fs-2);color:var(--steel)}
.promise svg{flex:none;color:var(--signal)}

/* company photos */
/* 固定页面的版式（2026-09-24 关于页定版时照博世公司页定下，交易条款等页共用）：无图首屏、大标题、页内导航、一段话、灰格数字、图文行 */
.pg-head{padding-block:var(--space-tight) 0}
.pg-kicker{color:var(--steel);font-size:var(--fs-3)}
.pg-head h1{margin-top:.5rem;font-size:clamp(2.75rem,5.5vw,4.25rem);line-height:1.02;letter-spacing:-.02em}
.pg-subnav{display:flex;flex-wrap:wrap;gap:0 2rem;margin-top:2.5rem;padding:.5rem 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.pg-subnav a{display:inline-flex;align-items:center;min-height:2.75rem;color:var(--ink);text-decoration:none;font-weight:500}
.pg-subnav a:hover{color:var(--signal)}
.pg-statement{margin:clamp(2.5rem,5vw,4rem) 0 0;max-width:56ch;font-size:clamp(1.25rem,1.8vw,1.5rem);line-height:1.45}
.pg-section{padding-top:clamp(3.5rem,7vw,6rem)}
.pg-section:last-of-type{padding-bottom:var(--space-block)}
.pg-section h2{font-size:clamp(1.75rem,2.8vw,2.25rem)}
.pg-section .muted{margin-top:.5rem}
.pg-body{margin-top:1rem;max-width:62ch;color:var(--steel);line-height:1.6}
.pg-tiles{list-style:none;margin:1.75rem 0 0;padding:0;display:grid;gap:.9rem;grid-template-columns:repeat(2,minmax(0,1fr))}
@media (min-width:60rem){.pg-tiles{grid-template-columns:repeat(3,minmax(0,1fr));gap:1.1rem}}
.pg-tiles li{padding:1.5rem 1.5rem 1.4rem;background:var(--paper);border-radius:var(--r);min-height:11rem;display:flex;flex-direction:column}
.pg-tiles svg{color:var(--ink);margin-bottom:1.5rem}
.pg-tiles b{display:block;margin-top:0;font:800 clamp(1.75rem,2.6vw,2.25rem)/1 var(--xc);letter-spacing:.01em}
.pg-tiles span{display:block;margin-top:.5rem;color:var(--steel);font-size:var(--fs-2);line-height:1.45}
.pg-links{display:flex;flex-wrap:wrap;gap:.5rem 2.5rem;margin-top:1.75rem}
.pg-links a{display:inline-flex;align-items:center;min-height:2.75rem;gap:.2rem;font-weight:600;text-decoration:none}
.pg-links a:hover{text-decoration:underline}
.pg-row{display:grid;gap:1.5rem;align-items:start}
@media (min-width:60rem){.pg-row{grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:4rem}.pg-row-rev{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}.pg-row-rev>figure{order:2}}
.pg-row figure{margin:0}.pg-row img{width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:var(--r)}
.pg-row h2{margin-top:.25rem}
.pg-table{width:100%;max-width:62ch;margin-top:1rem;border-collapse:collapse;border-top:2px solid var(--ink)}
.pg-table th{padding:.65rem .75rem .65rem 0;text-align:left;font:500 var(--fs-2)/1.3 var(--sans);color:var(--steel);border-bottom:1px solid var(--rule)}
.pg-table td{padding:.7rem .75rem .7rem 0;border-bottom:1px solid var(--rule);vertical-align:top;color:var(--steel)}
.pg-table td:first-child{color:var(--ink);font-weight:600;white-space:nowrap}
.pg-list{margin:1rem 0 0;padding-left:1.1rem;max-width:62ch;color:var(--steel);line-height:1.6}
.pg-list li{margin-top:.4rem}.pg-list b{color:var(--ink);font-weight:600}
.pg-body+.pg-body{margin-top:.75rem}
.pg-qa{margin:1.25rem 0 0;max-width:62ch;border-top:2px solid var(--ink)}
.pg-qa div{padding:1.1rem 0;border-bottom:1px solid var(--rule)}
.pg-qa dt{font-weight:600;font-size:var(--fs-4);line-height:1.35}
.pg-qa dd{margin:.5rem 0 0;color:var(--steel);line-height:1.6}
/* 联系页：灰格里放的是链接，值用正文字体（邮箱在窄体里不好认），询盘那段接在灰格后面要留一段距 */
.pg-tiles-contact b{font:700 clamp(1.25rem,1.8vw,1.5rem)/1.2 var(--sans);letter-spacing:0;overflow-wrap:anywhere}
.pg-tiles a{display:inline-block;padding-block:.625rem;margin-block:-.625rem;color:inherit;text-decoration:none}.pg-tiles a:hover{color:var(--signal);text-decoration:underline}
.pg-section+.quote{margin-top:var(--space-tight)}.pg-section+.quote .quote-grid{padding-block:var(--space-tight)}.quote+.pg-section{padding-top:var(--space-tight)}
.pg-body a{display:inline-block;padding-block:.35rem;margin-block:-.35rem}
.pg-map{grid-column:1/-1;margin-top:1rem;aspect-ratio:21/9;border-radius:var(--r);overflow:hidden;background:var(--rule)}
.pg-map iframe{display:block;width:100%;height:100%;border:0}
@media (max-width:40rem){.pg-map{aspect-ratio:4/3}}
@media (max-width:40rem){.pg-tiles{gap:.6rem}.pg-tiles li{padding:1rem;min-height:0}.pg-tiles svg{width:28px;height:28px;margin-bottom:.75rem}.pg-tiles b{font-size:1.5rem}.pg-tiles-contact{grid-template-columns:1fr}.pg-tiles-contact li{padding:1.25rem}}
.photo-strip{list-style:none;margin:clamp(1.5rem,3vw,2.5rem) 0 0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem}
@media (min-width:48rem){.photo-strip{grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}}
.photo-strip li:first-child{grid-column:1/-1}
@media (min-width:48rem){.photo-strip li:first-child{grid-column:auto}}
.photo-strip img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-card);background:var(--paper)}
.photo-strip figcaption{margin-top:.4rem;font-size:var(--fs-2);color:var(--steel)}
.prose .photo-strip{margin-top:1.25rem;margin-bottom:.5rem;padding-left:0;list-style:none;max-width:64rem}
.prose .photo-strip li{margin-top:0}
.prose .photo-strip figure{margin:0}

/* 打印（2026-09-28）：买家打印件号页做采购申请，只留正文，去掉页头页脚、聊天按钮、固定条与表单 */
@media print{.site-head,.site-foot,.chat-fab,.chat-panel,.sticky-bar,.quote,.skip,.copy,.cta-row,.assure-note,.related{display:none!important}body{background:#fff;color:#000}a{color:inherit;text-decoration:none}.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem}.lineage-table .row-this td{background:#f3ede0}}

/* footer */
.site-foot{margin-top:auto;background:var(--navy);color:var(--on-navy);padding-block:var(--space-block) 1.5rem;font-size:var(--fs-3)}
.foot-grid{display:grid;gap:2rem}
@media (min-width:40rem){.foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:60rem){.foot-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:3rem}}
.foot-grid h2{font:700 var(--fs-1)/1.2 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--white);margin-bottom:.75rem}
.foot-grid ul{list-style:none;margin:0;padding:0}
.foot-grid li a{display:block;padding:.65rem 0;color:var(--on-navy);text-decoration:none}
.foot-grid li a:hover{color:var(--white);text-decoration:underline}
.foot-brand .brand-mark img{height:2.75rem;width:auto}
.foot-brand p+p{margin-top:.6rem;max-width:36ch}
.foot-grid address{font-style:normal;line-height:1.75}
.foot-grid address a{display:inline-block;padding-block:.5rem;color:var(--on-navy)}
.foot-grid address a:hover{color:var(--white)}
.foot-legal{margin-top:2.5rem;padding-top:1.25rem;border-top:1px solid rgba(255,255,255,.14);font-size:var(--fs-2);max-width:90ch;color:var(--on-navy);opacity:.85}
.foot-legal p+p{margin-top:.4rem}

/* 页面收尾（替代模板里的内联 style） */
.section-list{padding-bottom:var(--space-block)}
.foot-note{padding-block:2rem}
/* 手机首屏压缩（C19）：标题两行、说明 16px、机型胶囊一行横滑 —— 放在文件末尾，压过上面的基础规则 */
@media (max-width:40rem){.hero-grid2{grid-template-columns:minmax(0,1fr)}.hero-text{min-width:0}.hero-text h1{font-size:2.25rem;max-width:12ch}.hero-text .lede{font-size:var(--fs-3)}.hero-search{margin-top:1.25rem}.chips{flex-wrap:nowrap;overflow-x:auto;scroll-snap-type:x mandatory;scroll-padding-inline:1rem;margin-inline:-1rem;padding-inline:1rem;scrollbar-width:none}.chips::-webkit-scrollbar{display:none}.chips li{flex:none;scroll-snap-align:start}}

/* ---- v7「工作室」版(2026-09-23,原 theme-studio.css):studio 是定版,合进 site.css 末尾;正式版不再有主题开关 ---- */
/* v7「工作室」版（2026-09-23）：照 Cummins / Fleetguard / Bosch 首页的共同做法 —— 实拍通栏首屏上压一块白色面板，
   标题 600 字重、句首大写、不加字距；工业感来自照片与钢灰色带，不来自字体噱头。全站去掉眉题、大写小标签、箭头、编号。
   极窄体只留给件号与大数字（件号是这门生意的主角，铸在零件上的号）。叠在 site.css 之上，SITE_THEME=studio 时引用。 */
:root{--paper:#FFFFFF;--steel-bg:#E8ECEF;--slate:#22303C;--ink:#22303C;--r:2px;--r-card:2px;--space-block:clamp(3.5rem,7vw,6rem);--shadow:0 24px 60px -28px rgba(14,27,43,.45)}
body{background:#fff;color:var(--slate)}
.section{background:#fff}
.section-white{background:var(--steel-bg)}
.section-navy{background:var(--navy);color:#fff}
/* 字：一族两貌 —— 正文与标题 Sofia Sans 400/500/600，号码 Sofia Sans XC 800 */
h1,h2,h3{font-weight:600;letter-spacing:-.01em}
h1{font-size:clamp(2.25rem,4.2vw,3.5rem);line-height:1.08}
h2{font-size:clamp(1.75rem,2.6vw,2.25rem);line-height:1.15}
h3{font-size:1.375rem}
.lede{font-size:1.125rem;line-height:1.55}
/* 去掉模板腔：眉题、大写小标签、链接箭头 */
.eyebrow{display:none}
.hero-text .eyebrow{display:block;margin-bottom:.9rem;font:500 1rem/1.4 var(--sans);letter-spacing:0;text-transform:none;color:var(--steel)}
.label,.price-label,.keyfacts dt,.pp-facts dt,.contact-grid dt,.foot-grid h2,.groups h2,.by-engine-label,.logo-wall-label,.nav-lang-label,.chat-title,.prose th,.spec dt{font:500 .875rem/1.4 var(--sans);letter-spacing:0;text-transform:none}
.section-head>a::after{content:none}
.section-head>a{font-weight:500;text-decoration:underline;text-underline-offset:.2em}
.site-nav a{font-weight:500}
.btn{font-weight:600;letter-spacing:0}
/* 首屏：通栏实拍，左侧白面板承载标题与搜索 */
.hero-home{background:var(--slate);padding:0}
.hero-home>.wrap.hero-grid2{position:relative;display:block;max-width:none;padding:clamp(2.5rem,6vw,5rem) 0}
.hero-visual{position:absolute;inset:0;margin:0;z-index:0}
.hero-visual img{width:100%;height:100%;object-fit:cover;object-position:55% 50%}
.hero-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(14,27,43,.45),rgba(14,27,43,.15) 60%,rgba(14,27,43,.3))}
.hero-visual figcaption{display:none}
.hero-text{position:relative;z-index:1;max-width:36rem;padding:clamp(1.5rem,3vw,2.25rem);background:#fff;border-radius:var(--r);box-shadow:var(--shadow);margin-inline:max(clamp(1rem,4vw,3rem),calc((100% - 76rem)/2 + clamp(1rem,4vw,3rem)))}
.hero-text h1{max-width:none}
.hero-text .lede{margin-top:1rem;font-size:1rem;line-height:1.55;max-width:none}
.hero-search{margin-top:1.75rem;max-width:none}
.hero-search .search input{min-height:3.5rem;font-size:1.125rem;border-color:var(--slate)}
.hero-search .search input::placeholder{font-family:var(--xc);font-weight:800;font-size:1.25rem;letter-spacing:.02em;color:#8A9199}
.hero-search .search-go{min-height:3.5rem;min-width:3.5rem}
.by-engine{margin-top:1.25rem}
.chips a{background:var(--steel-bg);border-color:transparent}
.chips a:hover{background:#DCE1E6;border-color:transparent}
.chips a.chip-all{background:transparent;border-color:var(--signal)}
.assure-wrap{background:#fff;padding-block:0}
.assure-wrap .assure{border-top:0;padding-block:1.1rem;font-weight:500}
@media (max-width:60rem){
  .hero-home>.wrap.hero-grid2{padding:0}
  .hero-visual{position:relative;height:13rem}
  .hero-visual::after{background:rgba(14,27,43,.12)}
  .hero-text{max-width:none;margin:0;box-shadow:none;border-radius:0;padding:1.75rem clamp(1rem,4vw,3rem) 1.5rem}
  .assure-wrap .assure{border-top:1px solid var(--rule)}
}
/* 数字带：钢灰 */
.stats-band{background:var(--steel-bg);color:var(--slate)}
.stats div{border-left:1px solid #C9D0D6}
.stats dd{font-size:clamp(2.25rem,4.5vw,3.25rem)}
.stats dt{color:#5B636B}
/* 图框：只框图，不框文字；不上浮 */
.cat-tiles img,.cat-blank,.pp-head img,.gallery-main,.news-cards img,.photo-mosaic img,.photo-strip img{border:1px solid #D5DBE0;border-radius:var(--r);box-shadow:none}
.section-white .cat-tiles img{border-color:transparent}
.cat-tiles a:hover img{border-color:var(--slate);box-shadow:none}
.card,.pcards a,.pcards .p-nopage,.part-preview{border:1px solid #D5DBE0;border-radius:var(--r)}
.section-white .card,.section-white .pcards a{border-color:transparent}
.p-blank{background:var(--steel-bg)}
.sub-chips a.chip-all:not(.is-on){background:var(--steel-bg);border-color:transparent;color:var(--ink)}
.card:hover,.pcards a:hover,.part-preview:hover{transform:none;box-shadow:none;border-color:var(--slate)}
.fam-list a:hover{background:var(--steel-bg)}
.section-white .fam-list a:hover{background:#fff}
/* 件号页 */
.pn{font-size:clamp(2.5rem,5vw,3.5rem)}
.pn-name{font-weight:600}
.notice{border-radius:var(--r)}
/* 聊天按钮用品牌蓝 */
.chat-fab{background:var(--signal)}
.chat-fab:hover{background:var(--signal-dark)}
.sb-chat{color:var(--signal)}
.site-foot{background:var(--navy)}
/* 关于页灰格 */
.pg-tiles li{background:var(--steel-bg)}