:root{
  --nav:#12324e; --brand:#1f5f8b; --brand-d:#173a57; --accent:#2E8B57;
  --ink:#16222e; --soft:#4a5b6b; --faint:#7f8fa0; --line:#e2e8ee;
  --bg:#ffffff; --bg2:#f4f7fa; --card:#ffffff; --gold:#c98a1a;
  --maxw:900px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:17px;line-height:1.62;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-underline-offset:2px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
img{max-width:100%}

/* header */
.top{background:var(--nav);color:#fff}
.top .wrap{display:flex;align-items:center;gap:16px;height:62px}
.top a.logo{color:#fff;text-decoration:none;font-weight:800;font-size:19px;letter-spacing:.2px;display:flex;align-items:center;gap:9px}
.top a.logo .m{width:26px;height:26px;border-radius:7px;background:linear-gradient(135deg,#3d8dbf,#2E8B57);display:flex;align-items:center;justify-content:center;font-size:15px}
.top nav{margin-left:auto;display:flex;gap:20px;font-size:14.5px}
.top nav a{color:#cfe0ec;text-decoration:none}
.top nav a:hover{color:#fff}
@media(max-width:640px){.top nav{display:none}}

/* hero */
.hero{background:linear-gradient(180deg,#eef4f9,#ffffff);border-bottom:1px solid var(--line)}
.hero .wrap{padding:52px 20px 40px}
.hero h1{font-size:clamp(28px,5vw,42px);line-height:1.15;margin:0 0 14px;letter-spacing:-.01em;text-wrap:balance}
.hero p.sub{font-size:19px;color:var(--soft);margin:0 0 26px;max-width:60ch}
.badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.badge{background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 14px;font-size:13.5px;color:var(--soft)}
.badge b{color:var(--ink)}

/* search box (hero) */
.searchbox{display:flex;gap:10px;max-width:560px;margin-top:8px}
.searchbox input{flex:1;padding:14px 16px;border:1.5px solid var(--line);border-radius:12px;font-size:16px;font-family:inherit}
.searchbox input:focus{outline:none;border-color:var(--brand)}
.searchbox button{background:var(--brand);color:#fff;border:0;border-radius:12px;padding:0 20px;font-size:16px;font-weight:600;cursor:pointer}
.searchbox button:hover{background:var(--brand-d)}

/* sections */
section{padding:40px 0}
h2.sec{font-size:26px;margin:0 0 6px;letter-spacing:-.01em}
.sec-sub{color:var(--soft);margin:0 0 22px}

/* category grid */
.cats{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.cat{display:block;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px;text-decoration:none;color:var(--ink);transition:border-color .15s,transform .15s}
.cat:hover{border-color:var(--brand);transform:translateY(-2px)}
.cat .ic{font-size:22px}
.cat h3{margin:8px 0 4px;font-size:17px}
.cat .n{color:var(--faint);font-size:13px}

/* breadcrumb */
.crumb{font-size:13.5px;color:var(--faint);padding:16px 0 0}
.crumb a{color:var(--brand);text-decoration:none}
.crumb span{color:var(--faint)}

/* article */
article{padding:14px 0 40px}
article h1{font-size:clamp(24px,4vw,33px);line-height:1.2;margin:10px 0 6px;text-wrap:balance}
.meta{font-size:13px;color:var(--faint);margin-bottom:22px;display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.pill{background:var(--bg2);border:1px solid var(--line);border-radius:999px;padding:3px 11px;color:var(--soft);font-size:12.5px}
.answer{font-size:18px;line-height:1.7}
.answer .lead{font-weight:600}
.block{background:var(--bg2);border:1px solid var(--line);border-left:3px solid var(--brand);border-radius:0 12px 12px 0;padding:18px 22px;margin:22px 0}
.block .lbl{font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--faint);font-weight:700;margin-bottom:7px}
.block.en{border-left-color:var(--accent)}
.src{margin:20px 0;font-size:15px}
.src a{font-weight:600}
.cta{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;font-weight:600;padding:12px 22px;border-radius:12px;margin-top:6px}
.cta:hover{filter:brightness(1.06)}

/* related */
.related{border-top:1px solid var(--line);padding-top:22px;margin-top:30px}
.related h3{font-size:16px;margin:0 0 12px}
.related ul{list-style:none;padding:0;margin:0}
.related li{margin:0}
.related a{display:block;padding:11px 0;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink)}
.related a:hover{color:var(--brand)}
.related a::before{content:"→";color:var(--brand);margin-right:9px}

/* list page */
.qlist{list-style:none;padding:0;margin:0}
.qlist li{border-bottom:1px solid var(--line)}
.qlist a{display:flex;gap:12px;padding:14px 4px;text-decoration:none;color:var(--ink)}
.qlist a:hover{background:var(--bg2)}
.qlist .qn{color:var(--faint);font-variant-numeric:tabular-nums;min-width:34px}
.qlist .qq{flex:1}

/* company strip */
.company{background:var(--bg2);border-top:1px solid var(--line)}
.company .grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:20px}
.company .stat .v{font-size:24px;font-weight:800;color:var(--nav)}
.company .stat .k{font-size:13px;color:var(--soft)}

/* footer */
footer{background:var(--nav);color:#c7d6e2;font-size:14px;padding:36px 0}
footer .wrap{display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between}
footer a{color:#9fc3dc;text-decoration:none}
footer h4{color:#fff;margin:0 0 8px;font-size:14px}
footer .col{max-width:280px}
footer .fine{width:100%;border-top:1px solid #23445f;padding-top:16px;color:#7fa0b8;font-size:12.5px}

/* AI assistant widget */
#hv-fab{position:fixed;right:20px;bottom:20px;z-index:900;background:var(--brand);color:#fff;border:0;
  border-radius:999px;padding:14px 20px;font-size:15px;font-weight:600;cursor:pointer;box-shadow:0 8px 26px -8px rgba(18,50,78,.5);display:flex;gap:9px;align-items:center;font-family:inherit}
#hv-fab:hover{background:var(--brand-d)}
#hv-panel{position:fixed;right:20px;bottom:20px;z-index:901;width:min(400px,calc(100vw - 32px));height:min(620px,calc(100vh - 40px));
  background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 24px 60px -20px rgba(18,50,78,.5);display:none;flex-direction:column;overflow:hidden}
#hv-panel.open{display:flex}
#hv-panel .h{background:var(--nav);color:#fff;padding:15px 18px;display:flex;align-items:center;gap:10px}
#hv-panel .h .t{font-weight:700}
#hv-panel .h .s{font-size:12px;color:#a9c4d8}
#hv-panel .h button{margin-left:auto;background:transparent;border:0;color:#cfe0ec;font-size:20px;cursor:pointer;line-height:1}
#hv-lang{background:rgba(255,255,255,.14);border:0;color:#fff;border-radius:7px;padding:4px 8px;font-size:12px;cursor:pointer;font-family:inherit}
#hv-msgs{flex:1;overflow-y:auto;padding:16px;background:var(--bg2);display:flex;flex-direction:column;gap:12px}
.hv-m{max-width:88%;padding:11px 14px;border-radius:14px;font-size:14.5px;line-height:1.5}
.hv-m.bot{background:#fff;border:1px solid var(--line);align-self:flex-start;border-bottom-left-radius:4px}
.hv-m.me{background:var(--brand);color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.hv-m.bot a{color:var(--brand);font-weight:600}
.hv-m .qref{font-size:12px;color:var(--faint);margin-bottom:4px}
.hv-chips{display:flex;flex-wrap:wrap;gap:7px;margin-top:4px}
.hv-chip{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 11px;font-size:12.5px;cursor:pointer;color:var(--soft)}
.hv-chip:hover{border-color:var(--brand);color:var(--brand)}
#hv-form{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line);background:#fff}
#hv-form input{flex:1;border:1.5px solid var(--line);border-radius:11px;padding:11px 13px;font-size:14.5px;font-family:inherit}
#hv-form input:focus{outline:none;border-color:var(--brand)}
#hv-form button{background:var(--brand);color:#fff;border:0;border-radius:11px;padding:0 16px;font-weight:600;cursor:pointer}

/* connect page (QR landing) */
.acts{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-top:6px}
.act{display:flex;flex-direction:column;gap:4px;background:#fff;border:1.5px solid var(--line);border-radius:14px;padding:16px 18px;text-decoration:none;color:var(--ink);transition:border-color .15s,transform .15s}
.act:hover{border-color:var(--brand);transform:translateY(-2px)}
.act.main{background:var(--brand);border-color:var(--brand);color:#fff}
.act.main .d{color:#d6e6f2}
.act .t{font-weight:700;font-size:16.5px}
.act .d{font-size:13.5px;color:var(--soft)}
.copyrow{display:flex;gap:8px;max-width:560px;margin:10px 0 18px}
.copyrow code{flex:1;background:var(--bg2);border:1.5px solid var(--line);border-radius:11px;padding:12px 14px;font-size:14.5px;overflow-x:auto;white-space:nowrap}
.copyrow button{background:var(--nav);color:#fff;border:0;border-radius:11px;padding:0 16px;font-weight:600;cursor:pointer;font-family:inherit}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px}
.step{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:14px 16px;font-size:14.5px}
.step h3{margin:0 0 6px;font-size:15px}
.step ol{margin:0;padding-left:18px}
.aibox{background:#fbfcfd;border:1px dashed #b9c9d6;border-radius:14px;padding:20px 22px;font-size:15px}
.aibox h2{margin-top:0}
.aibox table{border-collapse:collapse;width:100%;font-size:14px;margin:8px 0 14px}
.aibox th,.aibox td{text-align:left;padding:6px 8px;border-bottom:1px solid var(--line)}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}