/* Skeleton G — Industrial / Steel Blue + Safety Orange */
:root{
  --bg:#f3f5f8;
  --paper:#ffffff;
  --steel:#1e3a8a;
  --steel-dark:#15296b;
  --ink:#0f172a;
  --zinc:#94a3b8;
  --zinc-light:#cbd5e1;
  --line:#1f2937;
  --hairline:#d6dbe3;
  --orange:#f97316;
  --orange-dark:#c2410c;
  --yellow:#fbbf24;
  --text:#0f172a;
  --muted:#475569;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{background:var(--bg);color:var(--text);font-family:"Source Han Sans CN","Noto Sans CJK SC","Microsoft YaHei",-apple-system,sans-serif;font-size:15px;line-height:1.65;-webkit-font-smoothing:antialiased}
body{min-height:100vh;display:flex;flex-direction:column}
a{color:var(--steel);text-decoration:none}
a:hover{color:var(--orange-dark)}
img{max-width:100%;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 24px}

/* Hazard stripe utility */
.hazard{background:repeating-linear-gradient(45deg,#fbbf24 0,#fbbf24 12px,#0f172a 12px,#0f172a 24px);height:6px}
.hazard-thin{background:repeating-linear-gradient(45deg,#fbbf24 0,#fbbf24 8px,#0f172a 8px,#0f172a 16px);height:4px}

/* Topbar */
.topbar{background:var(--ink);color:#cbd5e1;font-size:12.5px;letter-spacing:0.04em}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:32px}
.topbar .meta{display:flex;gap:18px}
.topbar .meta span{display:inline-flex;align-items:center;gap:6px}
.topbar .meta b{color:var(--orange);font-weight:600}

/* Header */
header.site{background:var(--paper);border-bottom:4px solid var(--ink);position:relative}
header.site::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:4px;background:repeating-linear-gradient(45deg,#fbbf24 0,#fbbf24 10px,#0f172a 10px,#0f172a 20px);display:none}
.nav{display:flex;align-items:center;justify-content:space-between;padding:18px 0;gap:24px}
.brand{display:flex;align-items:center;gap:14px}
.brand .mark{width:54px;height:54px;background:var(--steel);color:#fff;font-size:26px;font-weight:900;display:grid;place-items:center;border:3px solid var(--ink);font-family:"Source Han Sans CN",sans-serif;position:relative}
.brand .mark::before{content:"";position:absolute;top:-3px;left:-3px;right:-3px;bottom:-3px;border:1px solid var(--orange);opacity:0.6}
.brand .txt{display:flex;flex-direction:column;line-height:1.1}
.brand .cn{font-size:20px;font-weight:800;color:var(--ink);letter-spacing:0.06em}
.brand .en{font-size:11px;color:var(--muted);letter-spacing:0.22em;text-transform:uppercase;margin-top:4px;font-weight:600}
nav.primary{display:flex;gap:2px}
nav.primary a{display:block;padding:10px 18px;color:var(--ink);font-weight:600;font-size:14.5px;border:1px solid transparent;letter-spacing:0.02em}
nav.primary a:hover{background:var(--ink);color:#fff}
nav.primary a.active{background:var(--steel);color:#fff;border-color:var(--steel-dark)}
.cta-call{background:var(--orange);color:#fff;padding:10px 18px;font-weight:700;font-family:Roboto,Arial,sans-serif;letter-spacing:0.04em;border:2px solid var(--ink)}
.cta-call:hover{background:var(--orange-dark);color:#fff}

/* Hero */
.hero{background:var(--ink);color:#fff;position:relative;overflow:hidden;border-bottom:4px solid var(--orange)}
.hero::before{content:"";position:absolute;top:0;right:0;width:42%;height:100%;background:linear-gradient(135deg,var(--steel) 0%,var(--steel-dark) 100%);clip-path:polygon(20% 0,100% 0,100% 100%,0 100%);opacity:0.92}
.hero .container{position:relative;display:grid;grid-template-columns:1.4fr 1fr;gap:36px;padding:64px 24px 72px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:10px;background:var(--orange);color:#0f172a;padding:6px 14px;font-size:12px;font-weight:800;letter-spacing:0.16em;text-transform:uppercase;margin-bottom:22px;font-family:Roboto,sans-serif;border:2px solid #fbbf24}
.hero-tag::before{content:"";width:8px;height:8px;background:#0f172a;display:inline-block}
.hero h1{font-size:46px;line-height:1.1;font-weight:900;letter-spacing:0.01em;margin-bottom:18px;color:#fff}
.hero h1 em{font-style:normal;color:var(--orange);font-weight:900}
.hero p.lead{font-size:16px;color:#cbd5e1;max-width:560px;margin-bottom:28px;line-height:1.75}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;font-weight:700;font-size:14px;letter-spacing:0.04em;border:2px solid;font-family:Roboto,"Source Han Sans CN",sans-serif}
.btn-primary{background:var(--orange);color:#0f172a;border-color:#fbbf24}
.btn-primary:hover{background:#fbbf24;color:#0f172a}
.btn-ghost{background:transparent;color:#fff;border-color:#fff}
.btn-ghost:hover{background:#fff;color:var(--ink)}
.hero-badges{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.hero-badge{background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.16);padding:18px 16px;backdrop-filter:blur(2px)}
.hero-badge .num{font-family:Roboto,sans-serif;font-size:34px;font-weight:900;color:var(--orange);line-height:1;letter-spacing:-0.02em}
.hero-badge .lbl{font-size:12px;color:#cbd5e1;margin-top:6px;letter-spacing:0.08em}

/* Section base */
section{padding:64px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:38px;gap:24px;border-bottom:2px solid var(--ink);padding-bottom:18px}
.section-head .left h2{font-size:30px;font-weight:900;color:var(--ink);letter-spacing:0.02em;line-height:1.15}
.section-head .left .en{font-size:11px;color:var(--muted);letter-spacing:0.3em;text-transform:uppercase;font-weight:700;margin-bottom:8px;font-family:Roboto,sans-serif}
.section-head .num{font-family:Roboto,sans-serif;font-size:54px;font-weight:900;color:var(--steel);opacity:0.18;line-height:0.9;letter-spacing:-0.04em}

/* Spec / product grid */
.spec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--ink);border:1px solid var(--ink)}
.spec-card{background:var(--paper);padding:24px;position:relative}
.spec-card .idx{position:absolute;top:0;right:0;background:var(--ink);color:var(--orange);font-family:Roboto,sans-serif;font-weight:800;font-size:12px;padding:4px 10px;letter-spacing:0.1em}
.spec-card h3{font-size:17px;font-weight:800;color:var(--ink);margin-bottom:10px;padding-bottom:10px;border-bottom:1px dashed var(--hairline)}
.spec-card .model{font-family:Roboto,sans-serif;font-size:12px;color:var(--orange-dark);font-weight:700;letter-spacing:0.06em;margin-bottom:8px}
.spec-card p{font-size:13.5px;color:var(--muted);line-height:1.7}
.spec-card .params{margin-top:14px;padding-top:14px;border-top:1px solid var(--hairline);display:grid;grid-template-columns:1fr 1fr;gap:6px 14px;font-size:12.5px}
.spec-card .params dt{color:var(--muted)}
.spec-card .params dd{color:var(--ink);font-weight:700;font-family:Roboto,"Source Han Sans CN",sans-serif}

/* Spec table */
.spec-table{width:100%;border-collapse:collapse;background:var(--paper);border:2px solid var(--ink);font-size:14px}
.spec-table thead th{background:var(--ink);color:#fff;font-weight:700;text-align:left;padding:14px 16px;letter-spacing:0.05em;font-size:13px;text-transform:uppercase;font-family:Roboto,"Source Han Sans CN",sans-serif;border-right:1px solid #334155}
.spec-table thead th:last-child{border-right:none}
.spec-table tbody td{padding:12px 16px;border-bottom:1px solid var(--hairline);border-right:1px solid var(--hairline);color:var(--ink)}
.spec-table tbody td:last-child{border-right:none}
.spec-table tbody tr:nth-child(even) td{background:#f8fafc}
.spec-table tbody tr:hover td{background:#fff7ed}
.spec-table .model-cell{font-family:Roboto,sans-serif;font-weight:700;color:var(--steel)}
.spec-table .badge-ok{display:inline-block;background:var(--steel);color:#fff;padding:2px 8px;font-size:11px;font-weight:700;letter-spacing:0.05em}

/* Process flow */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;background:var(--paper);border:1px solid var(--hairline);position:relative}
.flow-step{padding:24px 18px;position:relative;border-right:1px dashed var(--zinc-light)}
.flow-step:last-child{border-right:none}
.flow-step .step-num{font-family:Roboto,sans-serif;font-size:42px;font-weight:900;color:var(--steel);line-height:1;letter-spacing:-0.04em;margin-bottom:10px}
.flow-step .step-num::before{content:"0"}
.flow-step h4{font-size:15px;font-weight:800;color:var(--ink);margin-bottom:8px}
.flow-step p{font-size:12.5px;color:var(--muted);line-height:1.6}
.flow-step::after{content:"▶";position:absolute;right:-9px;top:32px;color:var(--orange);font-size:14px;background:var(--bg);padding:2px 0;z-index:2}
.flow-step:last-child::after{display:none}

/* Cert / badges */
.cert-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cert-card{background:var(--paper);border:1px solid var(--hairline);padding:24px 18px;text-align:center;position:relative;border-top:4px solid var(--steel)}
.cert-card:nth-child(2){border-top-color:var(--orange)}
.cert-card:nth-child(3){border-top-color:var(--ink)}
.cert-card:nth-child(4){border-top-color:var(--steel)}
.cert-card .icon{width:54px;height:54px;margin:0 auto 14px;background:var(--ink);color:var(--orange);display:grid;place-items:center;font-family:Roboto,sans-serif;font-weight:900;font-size:18px;letter-spacing:0.04em}
.cert-card h4{font-size:15px;font-weight:800;color:var(--ink);margin-bottom:6px}
.cert-card p{font-size:12.5px;color:var(--muted)}
.cert-card .code{font-family:Roboto,sans-serif;font-size:11px;color:var(--orange-dark);font-weight:700;margin-top:8px;letter-spacing:0.1em}

/* Cases */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case-card{background:var(--paper);border:1px solid var(--hairline);overflow:hidden;position:relative}
.case-card .pic{height:170px;background:linear-gradient(135deg,var(--steel) 0%,var(--ink) 100%);position:relative;overflow:hidden}
.case-card .pic::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(90deg,transparent 0,transparent 38px,rgba(255,255,255,0.06) 38px,rgba(255,255,255,0.06) 39px)}
.case-card .pic::after{content:attr(data-tag);position:absolute;left:14px;bottom:14px;background:var(--orange);color:#0f172a;padding:4px 10px;font-size:11px;font-weight:800;letter-spacing:0.08em}
.case-card .pic .scale{position:absolute;right:14px;top:14px;color:rgba(255,255,255,0.4);font-family:Roboto,sans-serif;font-size:11px;letter-spacing:0.2em}
.case-card .body{padding:18px 20px 22px}
.case-card .meta{font-family:Roboto,sans-serif;font-size:11px;color:var(--muted);letter-spacing:0.12em;margin-bottom:8px}
.case-card h3{font-size:16px;font-weight:800;color:var(--ink);margin-bottom:8px;line-height:1.4}
.case-card p{font-size:13px;color:var(--muted);line-height:1.65}

/* About blocks */
.about-hero{display:grid;grid-template-columns:1.2fr 1fr;gap:36px;align-items:start}
.about-hero .stats{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--ink);border:2px solid var(--ink)}
.about-hero .stats > div{background:var(--paper);padding:22px 18px;text-align:left}
.about-hero .stats .n{font-family:Roboto,sans-serif;font-size:38px;font-weight:900;color:var(--steel);line-height:1}
.about-hero .stats .l{font-size:12px;color:var(--muted);margin-top:8px;letter-spacing:0.05em}
.prose p{margin-bottom:14px;color:var(--muted);line-height:1.85}
.prose h3{font-size:20px;font-weight:800;color:var(--ink);margin:24px 0 12px;padding-left:14px;border-left:5px solid var(--orange)}

/* Value strip */
.values{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:var(--paper);border:1px solid var(--ink);border-left-width:4px;border-left-color:var(--orange)}
.values > div{padding:22px 20px;border-right:1px dashed var(--hairline)}
.values > div:last-child{border-right:none}
.values .lbl{font-family:Roboto,sans-serif;font-size:11px;color:var(--orange-dark);letter-spacing:0.18em;font-weight:700;margin-bottom:6px}
.values h4{font-size:16px;font-weight:800;color:var(--ink);margin-bottom:6px}
.values p{font-size:13px;color:var(--muted);line-height:1.6}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.contact-card{background:var(--paper);border:1px solid var(--hairline);border-top:4px solid var(--steel);padding:30px}
.contact-card h3{font-size:20px;font-weight:800;color:var(--ink);margin-bottom:20px;padding-bottom:14px;border-bottom:2px solid var(--ink)}
.contact-list{list-style:none}
.contact-list li{display:flex;padding:12px 0;border-bottom:1px dashed var(--hairline);gap:18px}
.contact-list li:last-child{border-bottom:none}
.contact-list .k{flex:0 0 90px;color:var(--muted);font-size:13px;font-weight:700;letter-spacing:0.04em}
.contact-list .v{color:var(--ink);font-size:14px;flex:1}
.contact-list .v a{color:var(--steel);font-weight:700}
.contact-list .v .tel{font-family:Roboto,sans-serif;font-size:18px;color:var(--orange-dark);font-weight:700;letter-spacing:0.04em}
.notice{background:#0f172a;color:#fbbf24;padding:18px 22px;border-left:6px solid var(--orange);font-size:13.5px;line-height:1.7;margin-top:24px}
.notice b{color:#fff;font-size:14px;display:block;margin-bottom:4px;letter-spacing:0.05em}

/* CTA strip */
.cta-strip{background:var(--ink);color:#fff;padding:48px 0;position:relative;overflow:hidden;border-top:4px solid var(--orange);border-bottom:4px solid var(--orange)}
.cta-strip::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:repeating-linear-gradient(45deg,#fbbf24 0,#fbbf24 10px,#0f172a 10px,#0f172a 20px)}
.cta-strip .container{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.cta-strip h3{font-size:26px;font-weight:900;letter-spacing:0.02em}
.cta-strip p{color:#cbd5e1;margin-top:6px;font-size:14px}
.cta-strip .phone{font-family:Roboto,sans-serif;font-size:30px;color:var(--orange);font-weight:900;letter-spacing:0.03em}

/* Footer */
footer.site{background:#0a1020;color:#94a3b8;padding:48px 0 0;margin-top:auto;border-top:6px solid var(--orange)}
footer.site .grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px;padding-bottom:36px;border-bottom:1px solid #1e293b}
footer.site h5{color:#fff;font-size:14px;font-weight:800;margin-bottom:16px;letter-spacing:0.06em;padding-bottom:10px;border-bottom:2px solid var(--orange);display:inline-block}
footer.site ul{list-style:none}
footer.site ul li{padding:5px 0;font-size:13px}
footer.site ul li a{color:#94a3b8}
footer.site ul li a:hover{color:var(--orange)}
footer.site .about-col p{font-size:13px;line-height:1.75;color:#94a3b8}
footer.site .about-col .logo-mini{display:flex;align-items:center;gap:10px;margin-bottom:14px}
footer.site .about-col .logo-mini .m{width:36px;height:36px;background:var(--orange);color:#0f172a;display:grid;place-items:center;font-weight:900;font-size:18px}
footer.site .about-col .logo-mini .t{color:#fff;font-weight:800;font-size:16px;letter-spacing:0.05em}
footer.site .bottom{padding:18px 0;font-size:12px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:#64748b}
footer.site .bottom a{color:#94a3b8}
footer.site .bottom a:hover{color:var(--orange)}

/* Page hero (interior pages) */
.page-hero{background:var(--ink);color:#fff;padding:54px 0 50px;border-bottom:4px solid var(--orange);position:relative}
.page-hero::after{content:"";position:absolute;bottom:-4px;left:0;right:0;height:4px;background:repeating-linear-gradient(45deg,#fbbf24 0,#fbbf24 10px,#0f172a 10px,#0f172a 20px)}
.page-hero .crumb{font-family:Roboto,sans-serif;font-size:11.5px;letter-spacing:0.16em;color:var(--orange);margin-bottom:14px;text-transform:uppercase;font-weight:700}
.page-hero h1{font-size:38px;font-weight:900;letter-spacing:0.02em;line-height:1.1}
.page-hero .sub{color:#cbd5e1;margin-top:14px;max-width:680px;font-size:15px;line-height:1.7}

/* Bullet list with industrial markers */
.checklist{list-style:none}
.checklist li{padding:10px 0 10px 30px;position:relative;border-bottom:1px dashed var(--hairline);color:var(--ink);font-size:14px}
.checklist li::before{content:"■";position:absolute;left:6px;top:11px;color:var(--orange);font-size:12px}
.checklist li b{color:var(--steel)}

/* Responsive */
@media (max-width: 900px){
  .hero .container{grid-template-columns:1fr;padding:44px 24px 52px}
  .hero h1{font-size:32px}
  .hero::before{display:none}
  .spec-grid,.cert-row,.case-grid,.flow,.values{grid-template-columns:1fr 1fr}
  .flow-step::after{display:none}
  .about-hero,.contact-grid{grid-template-columns:1fr}
  nav.primary{display:none}
  .topbar .meta span:not(:first-child){display:none}
  footer.site .grid{grid-template-columns:1fr 1fr}
}
@media (max-width: 540px){
  .spec-grid,.cert-row,.case-grid,.flow,.values,footer.site .grid,.about-hero .stats{grid-template-columns:1fr}
  .page-hero h1,.hero h1{font-size:26px}
  .section-head{flex-direction:column;align-items:flex-start}
  .section-head .num{display:none}
}