/* Industrial Automation Pro — design system */
:root{
  --navy:#0e1b2a; --navy2:#152740; --steel:#3d4f63; --line:#dde4ec;
  --ink:#1b2733; --mut:#5b6b7c; --bg:#ffffff; --soft:#f4f7fa;
  --acc:#e8650d; --acc2:#c14f03; --ok:#1d7a4f;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
img{max-width:100%;height:auto}
a{color:var(--acc2);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}

/* header */
header{background:var(--navy);position:sticky;top:0;z-index:50;box-shadow:0 2px 10px rgba(0,0,0,.25)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:1.05rem;letter-spacing:.2px}
.logo:hover{text-decoration:none}
.logo .bolt{display:inline-flex;width:30px;height:30px;border-radius:6px;background:var(--acc);align-items:center;justify-content:center;font-size:17px}
.logo span.pro{color:var(--acc)}
nav.menu{display:flex;gap:22px}
nav.menu a{color:#cfd9e4;font-weight:600;font-size:.92rem}
nav.menu a:hover{color:#fff;text-decoration:none}
.navtoggle{display:none}
label.burger{display:none;color:#fff;font-size:26px;cursor:pointer;line-height:1}
@media(max-width:820px){
  label.burger{display:block}
  nav.menu{display:none;position:absolute;top:74px;left:0;right:0;background:var(--navy2);flex-direction:column;gap:0;padding:8px 0;border-top:1px solid #223a57}
  nav.menu a{padding:12px 20px;border-bottom:1px solid #1d3350}
  .navtoggle:checked ~ nav.menu{display:flex}
}

/* hero */
.hero{background:linear-gradient(160deg,var(--navy) 0%,var(--navy2) 70%);color:#fff;padding:64px 0 56px}
.hero h1{font-size:clamp(1.7rem,4.2vw,2.7rem);line-height:1.2;max-width:760px}
.hero p.lead{margin:18px 0 26px;color:#c3d0dd;font-size:1.08rem;max-width:640px}
.hero .acc{color:var(--acc)}
.btn{display:inline-block;background:var(--acc);color:#fff;font-weight:700;padding:13px 26px;border-radius:8px;font-size:.98rem}
.btn:hover{background:var(--acc2);text-decoration:none}
.btn.ghost{background:transparent;border:2px solid #46617f;margin-left:10px}
.btn.ghost:hover{border-color:var(--acc);background:transparent}

/* sections */
section{padding:52px 0}
section.alt{background:var(--soft)}
h2.sec{font-size:clamp(1.35rem,3vw,1.8rem);margin-bottom:8px}
p.sub{color:var(--mut);margin-bottom:30px;max-width:680px}
.grid{display:grid;gap:18px;grid-template-columns:repeat(3,1fr)}
@media(max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.grid{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:22px;display:block;color:var(--ink);transition:box-shadow .15s,transform .15s}
.card:hover{box-shadow:0 6px 20px rgba(14,27,42,.10);transform:translateY(-2px);text-decoration:none}
.card .ic{font-size:26px;margin-bottom:10px;display:block}
.card h3{font-size:1.05rem;margin-bottom:6px;color:var(--navy)}
.card p{font-size:.9rem;color:var(--mut)}
.card .tag{display:inline-block;margin-top:12px;font-size:.78rem;font-weight:700;color:var(--acc2);letter-spacing:.4px;text-transform:uppercase}

/* article + prose */
.crumbs{font-size:.82rem;color:var(--mut);padding:18px 20px 0}
.crumbs a{color:var(--mut)}
article.prose{max-width:760px;margin:0 auto;padding:28px 20px 60px}
article.prose h1{font-size:clamp(1.6rem,3.6vw,2.3rem);line-height:1.25;margin-bottom:10px}
article.prose .meta{color:var(--mut);font-size:.88rem;margin-bottom:26px;padding-bottom:18px;border-bottom:1px solid var(--line)}
article.prose h2{font-size:1.45rem;margin:36px 0 12px;color:var(--navy)}
article.prose h3{font-size:1.12rem;margin:26px 0 8px;color:var(--navy)}
article.prose p{margin:0 0 16px}
article.prose ul,article.prose ol{margin:0 0 16px 24px}
article.prose li{margin-bottom:7px}
article.prose table{width:100%;border-collapse:collapse;margin:18px 0;font-size:.92rem}
article.prose th{background:var(--navy);color:#fff;text-align:left;padding:9px 12px;font-size:.85rem}
article.prose td{border:1px solid var(--line);padding:9px 12px}
article.prose tr:nth-child(even) td{background:var(--soft)}
.tablewrap{overflow-x:auto}
.callout{background:var(--soft);border-left:4px solid var(--acc);border-radius:0 8px 8px 0;padding:16px 18px;margin:20px 0;font-size:.95rem}
.callout b{color:var(--navy)}
.ctabox{background:var(--navy);color:#dfe8f1;border-radius:12px;padding:26px;margin:34px 0}
.ctabox h3{color:#fff;margin-bottom:8px;font-size:1.15rem}
.ctabox a.btn{margin-top:12px}
.faq h3{font-size:1.02rem}

/* footer */
footer{background:var(--navy);color:#9fb0c1;padding:44px 0 30px;margin-top:20px;font-size:.9rem}
footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:28px;margin-bottom:28px}
@media(max-width:820px){footer .cols{grid-template-columns:1fr 1fr}}
@media(max-width:520px){footer .cols{grid-template-columns:1fr}}
footer h4{color:#fff;font-size:.95rem;margin-bottom:12px}
footer a{color:#9fb0c1;display:block;margin-bottom:8px}
footer a:hover{color:#fff}
footer .fine{border-top:1px solid #22374f;padding-top:18px;font-size:.8rem}

/* fault-code library */
.codesearch{margin:18px 0 10px}
.codesearch input{width:100%;max-width:420px;padding:11px 14px;border:2px solid var(--line);border-radius:8px;font-size:.95rem}
.codesearch input:focus{outline:none;border-color:var(--acc)}
.codetable th{position:sticky;top:74px}
.codetable td:first-child{font-weight:700;color:var(--navy);white-space:nowrap}
.nores{display:none;color:var(--mut);padding:14px 0}

/* image logo */
.logoimg{height:58px;width:auto;display:block}
@media(max-width:400px){.logoimg{height:48px}}