:root{
  --brand:#1A4C5B; --brand-d:#0D2B34; --brand-l:#2C6B7E;
  --ink:#20262A; --muted:#5D6A72;
  --bg:#ffffff; --soft:#F4F7F8; --line:#E1E8EB;
  --gold:#B4894C; --gold-s:#FAF4EA; --gold-d:#8E6A38;
  --shadow:0 14px 38px rgba(13,43,52,.10); --radius:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",Helvetica,Arial,sans-serif;color:var(--ink);line-height:1.72;background:var(--bg);-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
img{max-width:100%;height:auto;display:block}
.hero .grid > *,.two > *,.cards > *,.apps > *,.ind > *,.steps > *,.certs > *,.gallery > *,.specs > *,.prods > *,.logos > *{min-width:0}

/* ---------- nav ---------- */
header.nav{position:sticky;top:0;background:rgba(255,255,255,.95);border-bottom:1px solid var(--line);z-index:30;backdrop-filter:saturate(180%) blur(8px)}
.nav .wrap{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:20px;height:70px}
.logo{font-weight:800;font-size:20px;color:var(--brand-d);letter-spacing:.2px;line-height:1.1}
.logo span{color:var(--gold)}
.logo .sub{font-size:10.5px;color:var(--muted);font-weight:600;letter-spacing:.9px;text-transform:uppercase;display:block;margin-top:3px}
.nav nav{display:flex;justify-content:center;align-items:center;gap:0}
.nav nav a{padding:10px 14px;font-size:15.5px;color:var(--muted);font-weight:600;border-radius:7px;transition:.15s}
.nav nav a:hover{color:var(--brand);background:var(--soft)}
.nav nav a.cur{color:var(--brand);background:var(--soft)}
.nav-cta{background:var(--brand);color:#fff;padding:12px 22px;border-radius:9px;font-size:15px;font-weight:700;white-space:nowrap;box-shadow:0 4px 12px rgba(26,76,91,.22);transition:.15s}
.nav-cta:hover{background:var(--brand-d)}
.nav-cb{position:absolute;opacity:0;width:1px;height:1px;pointer-events:none}
.nav-burger{display:none;font-size:26px;line-height:1;cursor:pointer;color:var(--brand-d);user-select:none}
.nav-cb:checked ~ .nav-burger::before{content:"✕"}
.nav-cb:checked ~ .nav nav{display:flex}
.nav-burger::before{content:"☰";font-size:26px;line-height:1;color:var(--brand-d)}

.wrap{max-width:1280px;margin:0 auto;padding:0 24px}

/* ---------- hero ---------- */
.hero{position:relative;background:radial-gradient(1000px 480px at 90% -14%,#E3EDF1 0%,rgba(227,237,241,0) 60%),linear-gradient(180deg,#F2F7F9,#ffffff);padding:62px 0 54px;border-bottom:1px solid var(--line);overflow:hidden}
.hero .grid{display:grid;grid-template-columns:1.05fr .95fr;gap:42px;align-items:center}
.hero .kicker{font-size:12.5px;font-weight:700;color:var(--gold-d);letter-spacing:1.1px;text-transform:uppercase}
.hero h1{font-size:35px;line-height:1.24;font-weight:800;margin-top:12px;max-width:580px;color:var(--brand-d)}
.hero p.sub{margin-top:16px;font-size:17px;color:var(--muted);max-width:540px}
.trustbar{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px;max-width:560px}
.trustbar span{font-size:11.5px;background:var(--gold-s);color:var(--gold-d);border:1px solid #EADFC8;padding:5px 11px;border-radius:20px;font-weight:700;white-space:nowrap}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:26px;max-width:580px}
.stat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 10px;text-align:center}
.stat b{display:block;font-size:19px;color:var(--brand-d);font-weight:800;line-height:1.15}
.stat span{font-size:11px;color:var(--muted)}
.hero-img{border-radius:16px;overflow:hidden;box-shadow:0 20px 44px rgba(13,43,52,.16);border:1px solid var(--line);min-height:470px;background:var(--soft);position:relative}
.hero-img img{width:100%;height:100%;min-height:470px;object-fit:cover}
.hero-img::after{content:"Factory photograph pending";position:absolute;left:0;right:0;bottom:0;padding:8px 14px;background:rgba(13,43,52,.72);color:#fff;font-size:12px;font-weight:600;letter-spacing:.3px}
.hero-img:has(img[src*="pending"])::after{content:"Factory photograph pending"}
.cta{display:inline-block;margin-top:20px;background:var(--brand);color:#fff;padding:13px 26px;border-radius:9px;font-size:15px;font-weight:700;box-shadow:0 8px 20px rgba(26,76,91,.26);transition:.18s}
.cta:hover{background:var(--brand-d);transform:translateY(-2px)}
.cta.ghost{background:#fff;color:var(--brand);border:1px solid var(--brand);margin-left:10px;box-shadow:none}
.cta.gold{background:var(--gold);box-shadow:0 8px 20px rgba(180,137,76,.26)}
.cta.gold:hover{background:var(--gold-d)}
.cta.ghost.gold{background:#fff;color:var(--gold-d);border:1px solid var(--gold)}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:13px 26px;border-radius:9px;font-size:15px;font-weight:700;border:0;cursor:pointer;box-shadow:0 8px 20px rgba(26,76,91,.26);transition:.18s}
.btn:hover{background:var(--brand-d);transform:translateY(-2px)}
.btn-outline{background:#fff;color:var(--brand);border:1px solid var(--brand);box-shadow:none}
.btn-gold{background:var(--gold)}
.btn-gold:hover{background:var(--gold-d)}

/* ---------- sections ---------- */
section{padding:56px 0}
section.alt{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
section.dark{background:var(--brand-d);color:#fff}
section.dark h2{color:#fff}
section.dark .lead{color:rgba(255,255,255,.78)}
section h2{font-size:26px;font-weight:800;margin-bottom:8px;letter-spacing:-.2px;color:var(--brand-d)}
section h2:after{content:"";display:block;width:48px;height:3px;background:var(--gold);border-radius:3px;margin-top:12px}
section .lead{color:var(--muted);margin-bottom:26px;font-size:15.5px;max-width:790px}
section h3{font-size:19px;color:var(--brand-d);margin-bottom:8px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center}
.two img{border-radius:14px;border:1px solid var(--line);box-shadow:var(--shadow)}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cards.c2{grid-template-columns:repeat(2,1fr)}
.card{border:1px solid var(--line);border-radius:14px;padding:24px;background:#fff;transition:.2s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.card h3{font-size:17px;margin-bottom:8px}
.card h3 a{color:inherit}
.card p{font-size:14px;color:var(--muted)}
.card .tag{display:inline-block;font-size:11px;background:var(--gold-s);color:var(--gold-d);padding:4px 11px;border-radius:20px;margin-bottom:11px;font-weight:700;letter-spacing:.3px}
.card .more{margin-top:12px;font-size:13.5px;font-weight:700}

.apps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.app{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:12.5px;color:var(--muted);transition:.2s}
.app:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.app .ph{height:130px;background:linear-gradient(135deg,#E8EFF2,#F6F9FA);display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--brand);font-weight:700;letter-spacing:.4px;text-align:center;padding:8px}
.app b{display:block;color:var(--ink);font-size:14.5px;margin:12px 13px 3px}
.app p{margin:0 13px 14px}

.truststrip{background:var(--brand-d);color:#fff;border-radius:14px;padding:20px 26px;display:flex;flex-wrap:wrap;justify-content:center;gap:12px 30px;margin-top:26px}
.truststrip span{font-size:14px;opacity:.95;display:inline-flex;align-items:center;gap:9px}
.truststrip b{font-weight:800}
.truststrip span:before{content:"✓";background:rgba(255,255,255,.18);border-radius:50%;width:21px;height:21px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;flex:none}

.ind{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.ind .it{border:1px solid var(--line);border-radius:12px;padding:18px;background:#fff}
.ind .it h4{font-size:15px;color:var(--brand-d);margin-bottom:5px}
.ind .it p{font-size:13px;color:var(--muted)}

.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;counter-reset:s}
.steps .st{counter-increment:s;background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 16px}
.steps .st:before{content:counter(s,decimal-leading-zero);font-size:12px;font-weight:800;color:var(--gold);letter-spacing:1px}
.steps .st h4{font-size:15px;color:var(--brand-d);margin:6px 0 5px}
.steps .st p{font-size:13px;color:var(--muted)}

.certs{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.cert{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px;text-align:center}
.cert .ic{width:46px;height:46px;border-radius:50%;background:var(--gold-s);color:var(--gold-d);display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-size:20px;font-weight:800}
.cert b{display:block;font-size:14.5px;color:var(--brand-d);margin-bottom:4px}
.cert span{font-size:12.5px;color:var(--muted)}

/* ---------- tables ---------- */
.specs{width:100%;border-collapse:collapse;font-size:14px;background:#fff}
.specs th,.specs td{border:1px solid var(--line);padding:11px 14px;text-align:left;vertical-align:top}
.specs thead th{background:var(--brand-d);color:#fff;font-weight:700;font-size:13.5px}
.specs tbody tr:nth-child(even){background:var(--soft)}
.specs td:first-child{font-weight:700;color:var(--brand-d);width:200px}
.tablewrap{overflow-x:auto;border-radius:12px;border:1px solid var(--line)}
/*窄屏：规格表转卡片，避免横向溢出 */
@media(max-width:700px){
  .tablewrap{overflow-x:visible;border:0;border-radius:0}
  .specs,.specs thead,.specs tbody,.specs tr,.specs th,.specs td{display:block;width:100%}
  .specs thead{display:none}
  .specs tr{border:1px solid var(--line);border-radius:12px;margin-bottom:12px;padding:4px 14px;background:#fff;overflow:hidden}
  .specs td{border:0;border-bottom:1px dashed var(--line);padding:10px 0;width:auto !important}
  .specs tr td:last-child{border-bottom:0}
  .specs tr td:first-child{background:var(--brand-d);color:#fff;margin:0 -14px;padding:9px 14px;font-size:13px;letter-spacing:.3px}
  .specs tr td:first-child::after{content:""}
  .specs tbody tr:nth-child(even){background:#fff}
}

.logos{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;align-items:center}
.logos .lg{border:1px solid var(--line);border-radius:10px;padding:14px 20px;background:#fff;font-size:15px;font-weight:700;color:var(--brand-d);letter-spacing:.3px}

.why ul{margin:0;padding-left:0;list-style:none}
.why li{padding:12px 0 12px 32px;position:relative;border-bottom:1px solid var(--line);font-size:15px}
.why li:last-child{border-bottom:0}
.why li:before{content:"✓";position:absolute;left:0;top:12px;width:21px;height:21px;border-radius:50%;background:var(--gold-s);color:var(--gold-d);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800}
.why li b{color:var(--brand-d)}

/* ---------- FAQ（可见 details → 再生成 FAQPage schema） ---------- */
details.faq{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;overflow:hidden}
details.faq summary{padding:16px 20px;font-size:16px;font-weight:700;color:var(--brand-d);cursor:pointer;list-style:none;position:relative;padding-right:44px}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary:after{content:"+";position:absolute;right:18px;top:14px;font-size:22px;font-weight:400;color:var(--gold);line-height:1}
details.faq[open] summary:after{content:"−"}
details.faq .a{padding:0 20px 18px;font-size:14.5px;color:var(--muted)}
.faqlist{max-width:840px}

/* ---------- CTA band ---------- */
.cta-band{background:linear-gradient(135deg,var(--brand-d),var(--brand));border-radius:18px;padding:42px 40px;color:#fff;display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center}
.cta-band h2{color:#fff;font-size:25px;margin:0}
.cta-band h2:after{display:none}
.cta-band p{color:rgba(255,255,255,.82);margin-top:8px;font-size:15.5px;max-width:620px}
.cta-band .btn{background:var(--gold);box-shadow:0 8px 20px rgba(0,0,0,.2)}
.cta-band .btn:hover{background:var(--gold-d)}

/* ---------- breadcrumb / page head ---------- */
.crumb{font-size:13px;color:var(--muted);padding:18px 0 0}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand)}
.crumb span{color:var(--line);margin:0 7px}
.pagehead{background:linear-gradient(180deg,#F2F7F9,#fff);border-bottom:1px solid var(--line);padding:14px 0 44px}
.pagehead h1{font-size:32px;line-height:1.26;font-weight:800;color:var(--brand-d);margin-top:14px;max-width:820px}
.pagehead .lead{margin-top:14px;font-size:17px;color:var(--muted);max-width:800px}

/* ---------- forms ---------- */
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:700;color:var(--brand-d);margin-bottom:6px}
.field .req{color:#B4453C}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:9px;font-size:15px;font-family:inherit;background:#fff;color:var(--ink)}
.field input:focus,.field select:focus,.field textarea:focus{outline:0;border-color:var(--brand);box-shadow:0 0 0 3px rgba(26,76,91,.10)}
.field textarea{min-height:130px;resize:vertical}
.formnote{font-size:12.5px;color:var(--muted);margin-top:6px}
.hp{position:absolute!important;left:-9999px!important;opacity:0;height:0;overflow:hidden}

/* ---------- footer ---------- */
footer{background:var(--brand-d);color:rgba(255,255,255,.72);padding:52px 0 26px;font-size:14px}
footer .fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:34px}
footer h4{color:#fff;font-size:14px;margin-bottom:12px;letter-spacing:.4px;text-transform:uppercase}
footer a{color:rgba(255,255,255,.72)}
footer a:hover{color:#fff}
footer .fcol ul{list-style:none}
footer .fcol li{margin-bottom:7px}
footer .brandline{font-size:18px;font-weight:800;color:#fff;margin-bottom:8px}
footer .brandline span{color:var(--gold)}
footer .bot{margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);font-size:12.5px;display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between}
.certbadge{margin-top:12px;font-size:12px;color:var(--gold)}

/* ---------- misc ---------- */
.note{background:var(--gold-s);border-left:3px solid var(--gold);border-radius:0 10px 10px 0;padding:15px 18px;font-size:14px;color:var(--gold-d);margin:20px 0}
.note b{color:var(--gold-d)}
.prods{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.pitem{border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden;transition:.2s}
.pitem:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.pitem .ph{height:140px;background:linear-gradient(135deg,#E8EFF2,#F7FAFB);display:flex;align-items:center;justify-content:center;text-align:center;font-size:12.5px;color:var(--brand);font-weight:700;padding:10px}
.pitem b{display:block;padding:13px 14px 3px;font-size:14.5px;color:var(--brand-d)}
.pitem span{display:block;padding:0 14px 14px;font-size:12.5px;color:var(--muted)}
.kv{display:grid;grid-template-columns:190px 1fr;gap:6px 18px;font-size:14.5px}
.kv dt{font-weight:700;color:var(--brand-d)}
.kv dd{margin:0;color:var(--muted)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
.skip{position:absolute;left:-999px}
.skip:focus{left:12px;top:12px;background:var(--brand);color:#fff;padding:10px 16px;z-index:99;border-radius:6px}

/* ---------- responsive ---------- */
@media(max-width:980px){
  .hero .grid{grid-template-columns:1fr}
  .hero-img,.hero-img img{min-height:320px}
  .two{grid-template-columns:1fr}
  .cards,.cards.c2,.prods{grid-template-columns:repeat(2,1fr)}
  .apps,.ind,.certs{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .pgrid{grid-template-columns:repeat(2,1fr)}
  footer .fgrid{grid-template-columns:1fr 1fr}
  .cta-band{grid-template-columns:1fr;padding:32px 26px}
}
@media(max-width:860px){
  .nav-burger{display:block}
  .nav nav{display:none;position:absolute;top:70px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:10px 0;box-shadow:var(--shadow)}
  .nav nav a{padding:13px 24px}
  .nav .right .nav-cta{display:none}
}
@media(max-width:620px){
  .wrap{padding:0 16px}
  .hero{padding:42px 0 38px}
  .hero h1{font-size:27px}
  section{padding:40px 0}
  section h2{font-size:22px}
  .pagehead h1{font-size:25px}
  .cards,.cards.c2,.prods,.apps,.ind,.certs,.steps,.pgrid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .kv{grid-template-columns:1fr;gap:2px 0}
  .kv dd{margin-bottom:10px}
  .cta.ghost{margin-left:0;display:block;margin-top:10px;text-align:center}
  footer .fgrid{grid-template-columns:1fr}
  .btn,.cta{width:100%;text-align:center}
}