:root{
  --ink:#12141a; --ink-2:#3b4150; --line:#e6e8ee; --bg:#ffffff; --bg-2:#f6f7fa;
  --accent:#d5261f; --accent-dk:#a81c17; --ok:#127a3d; --warn:#b45309;
  --radius:12px; --maxw:1180px;
  --shadow:0 1px 2px rgba(16,24,40,.06),0 8px 24px rgba(16,24,40,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:10px;padding:13px 22px;font-weight:650;font-size:15px;cursor:pointer;transition:.15s}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dk)}
.btn-dark{background:var(--ink);color:#fff}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink)}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* header */
header.site{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.02em;font-size:20px}
.brand .dot{width:22px;height:22px;border-radius:50%;border:5px solid var(--accent)}
.nav .links{display:flex;gap:20px;margin-left:auto;font-size:15px;color:var(--ink-2)}
.nav .links a:hover{color:var(--ink)}
.cart-link{position:relative;font-weight:650}
.cart-count{position:absolute;top:-8px;right:-14px;background:var(--accent);color:#fff;font-size:11px;font-weight:700;border-radius:999px;padding:1px 6px}
.announce{background:var(--ink);color:#fff;text-align:center;font-size:13.5px;padding:9px 12px}

/* hero */
.hero{background:linear-gradient(180deg,#0f1116,#1a1e27);color:#fff;padding:64px 0 72px}
.hero h1{font-size:clamp(30px,4.4vw,52px);line-height:1.08;letter-spacing:-.03em;margin:0 0 14px;max-width:16ch}
.hero p{color:#b9bfcd;font-size:18px;max-width:52ch;margin:0 0 26px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero img{border-radius:16px;background:#fff;padding:14px}
@media(max-width:860px){.hero-grid{grid-template-columns:1fr}}

/* vehicle picker */
.picker{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin:-34px auto 0;position:relative;z-index:5;box-shadow:var(--shadow)}
.picker h3{margin:0 0 4px;font-size:17px}
.picker .row{display:grid;grid-template-columns:repeat(3,1fr) auto;gap:12px;margin-top:14px}
@media(max-width:760px){.picker .row{grid-template-columns:1fr 1fr}}
select,input[type=text],input[type=email],input[type=number],input[type=tel],textarea{
  width:100%;padding:12px 13px;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fff;color:var(--ink)}
select:focus,input:focus,textarea:focus{outline:2px solid rgba(213,38,31,.25);border-color:var(--accent)}

/* sections */
section{padding:64px 0}
section.tight{padding:40px 0}
h2.sec{font-size:clamp(24px,3vw,34px);letter-spacing:-.02em;margin:0 0 10px}
p.sec{color:var(--ink-2);margin:0 0 30px;max-width:62ch}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media(max-width:900px){.grid-3,.grid-4{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.grid-3,.grid-4{grid-template-columns:1fr}}
.card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:.18s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.card .pad{padding:16px}
.card h4{margin:0 0 6px;font-size:16px}
.muted{color:var(--ink-2);font-size:14px}
.price{font-weight:750;font-size:17px}

/* product page */
.pdp{display:grid;grid-template-columns:1.08fr .92fr;gap:44px;padding-top:34px}
@media(max-width:900px){.pdp{grid-template-columns:1fr}}
.gallery .main{border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:10px}
.thumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.thumbs img{width:74px;height:74px;object-fit:cover;border:1px solid var(--line);border-radius:9px;cursor:pointer;padding:3px;background:#fff}
.thumbs img.active{border-color:var(--accent);border-width:2px}
.pdp h1{font-size:clamp(23px,2.6vw,32px);letter-spacing:-.02em;line-height:1.2;margin:6px 0 10px}
.rating{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-2);margin-bottom:14px}
.stars{color:#f5a623;letter-spacing:1px}
.pdp .price-row{display:flex;align-items:baseline;gap:12px;margin:6px 0 4px}
.pdp .price-row .now{font-size:30px;font-weight:800}
.pdp .price-row .was{text-decoration:line-through;color:#8b91a0}
.save{background:#eafaf0;color:var(--ok);font-size:13px;font-weight:700;padding:3px 9px;border-radius:999px}
.opt{margin:20px 0}
.opt-label{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-2);margin-bottom:10px}
.swatches{display:flex;gap:10px;flex-wrap:wrap}
.sw{width:40px;height:40px;border-radius:50%;border:2px solid #fff;box-shadow:0 0 0 1px var(--line);cursor:pointer;position:relative}
.sw.active{box-shadow:0 0 0 2px var(--ink)}
.sw-name{font-size:14px;font-weight:650;margin-top:8px}
.bundles{display:grid;gap:10px}
.bundle{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:11px;padding:13px 15px;cursor:pointer}
.bundle.active{border-color:var(--accent);background:#fff7f6}
.bundle .b-name{font-weight:650}
.bundle .b-price{margin-left:auto;font-weight:750}
.bundle .tag{background:var(--ink);color:#fff;font-size:11px;font-weight:700;padding:2px 7px;border-radius:999px}
.fitcheck{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin:18px 0}
.fitcheck .row{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px;margin-top:10px}
.fit-msg{margin-top:12px;font-size:14.5px;font-weight:650;padding:10px 12px;border-radius:9px}
.fit-ok{background:#eafaf0;color:var(--ok)}
.fit-no{background:#fff1f0;color:#b42318}
.trust{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:22px 0;font-size:14px}
.trust div{display:flex;gap:9px;align-items:flex-start;color:var(--ink-2)}
.trust b{color:var(--ink);display:block;font-size:14.5px}
.acc{border-top:1px solid var(--line)}
.acc details{border-bottom:1px solid var(--line);padding:14px 0}
.acc summary{cursor:pointer;font-weight:650;list-style:none}
.acc summary::-webkit-details-marker{display:none}
.acc summary:before{content:"+";display:inline-block;width:18px;font-weight:800;color:var(--accent)}
.acc details[open] summary:before{content:"–"}
.acc p{color:var(--ink-2);margin:10px 0 0 18px}
table.spec{width:100%;border-collapse:collapse;font-size:15px}
table.spec td{padding:10px 4px;border-bottom:1px solid var(--line);vertical-align:top}
table.spec td:first-child{color:var(--ink-2);width:42%}
table.fit{width:100%;border-collapse:collapse;font-size:14.5px}
table.fit th,table.fit td{border:1px solid var(--line);padding:8px 10px;text-align:left}
table.fit th{background:var(--bg-2);font-size:13px;text-transform:uppercase;letter-spacing:.04em;color:var(--ink-2)}

/* cart / checkout */
.cart-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:34px;align-items:start;padding-top:30px}
@media(max-width:900px){.cart-grid{grid-template-columns:1fr}}
.line{display:grid;grid-template-columns:86px 1fr auto;gap:16px;padding:16px 0;border-bottom:1px solid var(--line);align-items:center}
.line img{border:1px solid var(--line);border-radius:9px;background:#fff;padding:4px}
.qty{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.qty button{background:#fff;border:0;width:32px;height:32px;font-size:17px;cursor:pointer}
.qty span{min-width:34px;text-align:center;font-weight:650}
.summary{border:1px solid var(--line);border-radius:var(--radius);padding:20px;background:var(--bg-2);position:sticky;top:84px}
.summary .r{display:flex;justify-content:space-between;margin:9px 0;font-size:15px}
.summary .tot{font-size:20px;font-weight:800;border-top:1px solid var(--line);padding-top:12px;margin-top:12px}
.field{margin:12px 0}
.field label{display:block;font-size:13px;font-weight:650;margin-bottom:5px;color:var(--ink-2)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.note{font-size:13px;color:var(--ink-2)}
.empty{padding:60px 0;text-align:center;color:var(--ink-2)}
footer.site{background:#0f1116;color:#9aa3b2;padding:52px 0 34px;margin-top:40px;font-size:14.5px}
footer.site .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
@media(max-width:760px){footer.site .cols{grid-template-columns:1fr 1fr}}
footer.site h5{color:#fff;font-size:13px;text-transform:uppercase;letter-spacing:.08em;margin:0 0 12px}
footer.site a:hover{color:#fff}
footer.site .fine{border-top:1px solid #23272f;margin-top:30px;padding-top:18px;font-size:13px;color:#6d7684}
.badges{display:flex;gap:10px;flex-wrap:wrap;color:var(--ink-2);font-size:13px;margin-top:18px}
.badge{border:1px solid var(--line);border-radius:999px;padding:6px 12px;background:#fff}

/* ---- 首页新版组件 ---- */
.eyebrow{display:inline-block;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);font-weight:700;margin-bottom:14px}
.lead{font-size:17px;line-height:1.65;color:var(--ink-2);max-width:640px;margin:14px 0 22px}
.row{display:flex;gap:12px;flex-wrap:wrap}
.btn.ghost{background:#fff;color:var(--ink);border:1.5px solid var(--line)}
.btn.ghost:hover{border-color:var(--accent);color:var(--accent)}
.chips{list-style:none;display:flex;gap:8px;flex-wrap:wrap;padding:0;margin:26px 0 0}
.chips li{font-size:12.5px;font-weight:600;color:var(--ink-2);background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 12px}
.sub{color:var(--ink-2);max-width:660px;margin:-6px 0 22px;font-size:15px}
.center{text-align:center}.center .sub{margin-left:auto;margin-right:auto}
.vgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.vcard{display:flex;align-items:center;justify-content:space-between;gap:14px;background:#fff;border:1.5px solid var(--line);border-radius:var(--radius);padding:20px 22px;transition:.15s}
.vcard:hover{border-color:var(--accent);box-shadow:0 8px 24px rgba(0,0,0,.06);transform:translateY(-1px)}
.vcard-t h3{margin:0 0 4px;font-size:19px}.vcard-t p{margin:0;color:var(--ink-2);font-size:13px}
.vcard-n{font-size:12px;font-weight:700;color:var(--accent);background:#fdf2f1;border-radius:999px;padding:6px 12px;white-space:nowrap}
.pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(228px,1fr));gap:18px}
.pcard{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.15s}
.pcard:hover{box-shadow:0 10px 28px rgba(0,0,0,.08);transform:translateY(-2px)}
.pcard-img{aspect-ratio:1/1;background:var(--bg-2);display:flex;align-items:center;justify-content:center;padding:10px}
.pcard-img img{max-width:100%;max-height:100%;object-fit:contain}
.pcard-body{padding:14px 15px 16px;display:flex;flex-direction:column;flex:1;gap:8px}
.pcard-tag{font-size:11px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--ink-2)}
.pcard-body h3{font-size:14.5px;line-height:1.4;margin:0;flex:1}
.pcard-foot{display:flex;align-items:center;justify-content:space-between;gap:8px;padding-top:6px;border-top:1px solid var(--line)}
.pcard-price{font-weight:800;font-size:15px}
.pcard-cta{font-size:12.5px;font-weight:700;color:var(--accent)}
.tblwrap{overflow-x:auto}
.btable{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.btable th,.btable td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line);font-size:14.5px}
.btable thead th{background:#fff;font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-2)}
.btable tbody tr:last-child td{border-bottom:0}
.btable td.bt{color:var(--ok);font-weight:700;font-size:12.5px}
.fgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.fcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.fcard h3{margin:0 0 8px;font-size:16.5px}
.fcard p{margin:0;color:var(--ink-2);font-size:14px;line-height:1.6}
.ficon{width:30px;height:30px;border-radius:9px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;margin-bottom:12px}
.faqgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:12px}
.faqgrid details{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}
.faqgrid summary{cursor:pointer;font-weight:700;font-size:15px}
.faqgrid p{margin:10px 0 0;color:var(--ink-2);font-size:14px;line-height:1.6}