:root{
  --ink:#1a1a1a; --navy:#1b365d; --ink2:#5e5d59; --line:#e6e2da; --bg:#f8f7f3; --card:#fff;
  --accent:#ff6b4a; --accent2:#e85530; --accent-ink:#c2410c; --hot:#c2410c; --chip:#f0ece4;
  --shadow:0 1px 2px rgba(26,26,26,.05),0 6px 22px rgba(27,54,93,.07);
}
*{box-sizing:border-box}
html,body{margin:0}
body{font:15px/1.55 var(--font-body,"Montserrat"),-apple-system,system-ui,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
h1{font-family:"Playfair Display",Georgia,serif;font-size:21px;margin:0;letter-spacing:.2px;font-weight:700;color:var(--navy)}
.sub{margin:3px 0 0;font-size:12.5px;color:var(--ink2)}

.top{display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:14px 20px;background:linear-gradient(180deg,#fff,#fffdfa);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:12px}
.logo{width:40px;height:40px;border-radius:9px;display:block}
.lang{border:1px solid var(--line);background:#fff;border-radius:8px;padding:6px 12px;cursor:pointer;
  font-weight:600;color:var(--ink2)}
.lang:hover{border-color:var(--accent);color:var(--accent)}

main{max-width:920px;margin:0 auto;padding:22px 16px 60px}
.searchbar{display:flex;gap:8px}
#q{flex:1;font-size:17px;padding:14px 16px;border:1.5px solid var(--line);border-radius:12px;
  background:#fff;box-shadow:var(--shadow);outline:none}
#q:focus{border-color:var(--accent)}
#go{padding:0 22px;font-size:16px;font-weight:600;color:#fff;border:0;border-radius:12px;cursor:pointer;
  background:linear-gradient(135deg,var(--navy),#102138)}
#go:active{transform:translateY(1px)}
#go:focus-visible,.lang:focus-visible,#q:focus-visible,.gbox input:focus-visible{outline:3px solid var(--accent);outline-offset:2px}

.modes{display:flex;flex-wrap:wrap;gap:12px 18px;margin:14px 2px 6px;align-items:center}
.chk{display:flex;align-items:center;gap:6px;font-size:13.5px;color:var(--ink2);cursor:pointer}
.chk input{accent-color:var(--accent)}

.chips-label{margin:16px 2px 2px;font-size:12.5px;color:var(--ink2)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:6px 0 4px}
.chip{display:inline-flex;align-items:center;gap:6px;padding:7px 12px;border-radius:20px;cursor:pointer;
  background:#fff;border:1.5px solid var(--line);font:inherit;font-size:13px;color:var(--ink);transition:.15s ease}
.chip:hover{border-color:var(--accent);box-shadow:var(--shadow);transform:translateY(-1px)}
.chip:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.chip.on{background:var(--navy);border-color:var(--navy);color:#fff;font-weight:600}
.chip.on::before{content:"\2713";font-weight:700}
.chip.on small{color:#c7d2e0}
.chip .flag{font-size:15px}
.chip small{color:var(--ink2);font-size:11px}

.status{min-height:20px;margin:8px 2px;font-size:13px;color:var(--ink2)}
.status .err{color:var(--hot)}

.path{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:12.5px;color:var(--ink2);margin-bottom:10px}
.path b{color:var(--ink)}
.path .sep{color:#c4bbad}

.node{background:linear-gradient(135deg,var(--navy),#102138);color:#fff;border-radius:14px;padding:16px 18px;margin-bottom:14px}
.node .c{font:600 22px/1 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:1px}
.node .d{margin-top:6px;color:#cfe0ea;font-size:14px}
.node .tag{display:inline-block;margin-top:10px;font-size:11px;background:rgba(255,255,255,.14);
  padding:3px 9px;border-radius:20px}

.card{background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);overflow:hidden}
.row{display:flex;gap:12px;align-items:flex-start;padding:12px 16px;border-top:1px solid var(--line);cursor:pointer}
.row:first-child{border-top:0}
.row:hover{background:#faf7f2}
.row .code{font:600 14px/1.3 ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--navy);white-space:nowrap}
.row .desc{flex:1}
.row .lvl{font-size:10.5px;color:#fff;background:#94a8b6;border-radius:5px;padding:2px 6px;align-self:center}
.row .more{font-size:11px;color:var(--accent-ink);align-self:center}
.row.leaf{cursor:default}

.cmp-head{padding:4px 2px 12px;font-size:13.5px;color:var(--ink2)}
.cgroup{margin-bottom:10px}
.cgroup>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:10px;
  padding:12px 16px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}
.cgroup[open]>summary{border-radius:12px 12px 0 0;border-bottom:0}
.cgroup>summary::-webkit-details-marker{display:none}
.cgroup .nm{font-weight:600}
.cgroup .sys{font-size:11px;color:var(--ink2);background:var(--chip);padding:2px 8px;border-radius:20px}
.cgroup .cnt{margin-left:auto;font-weight:700;color:var(--navy)}
.cgroup .cnt small{font-weight:400;color:var(--ink2)}
.cgroup .body{border:1px solid var(--line);border-top:0;border-radius:0 0 12px 12px;overflow:hidden}
.empty{color:var(--ink2);font-size:13px;padding:18px;text-align:center}

footer{max-width:920px;margin:0 auto;padding:18px 16px 40px;color:var(--ink2);font-size:12px;
  display:flex;gap:8px;flex-wrap:wrap}
.dot{color:#d8cfc2}

@media(max-width:560px){
  .top{padding:12px 14px}.searchbar{flex-direction:column}#go{padding:12px}
  .node .c{font-size:19px}
}

/* email gate */
.gate{position:fixed;inset:0;background:rgba(14,36,54,.55);backdrop-filter:blur(4px);
  display:grid;place-items:center;z-index:50;padding:20px}
.gbox{background:#fff;border-radius:18px;padding:30px 26px;max-width:380px;width:100%;
  box-shadow:0 20px 60px rgba(14,36,54,.3);text-align:center}
.glogo{width:48px;height:48px;margin:0 auto 10px;border-radius:11px;display:block}
.gbox h2{font-family:"Playfair Display",Georgia,serif;font-size:20px;margin:6px 0 4px;color:var(--navy)}
.gdesc{color:var(--ink2);font-size:13px;margin:0 0 18px}
.gbox input{width:100%;font-size:16px;padding:13px 14px;border:1.5px solid var(--line);border-radius:11px;margin-bottom:10px;text-align:center}
.gbox input:focus{outline:none;border-color:var(--accent)}
#gcode{letter-spacing:6px;font-family:ui-monospace,monospace}
.gbox button{width:100%;padding:13px;font-size:15px;font-weight:600;color:#fff;border:0;border-radius:11px;cursor:pointer;
  background:linear-gradient(135deg,var(--navy),#102138)}
.gbox button:disabled{opacity:.6}
.gchange{margin-top:12px;font-size:12.5px;color:var(--accent-ink);cursor:pointer;background:none;border:0;display:block;margin-left:auto;margin-right:auto}
.gmsg{margin-top:12px;font-size:13px;color:var(--ink2);min-height:18px}
.gmsg.err{color:var(--hot)}
.quota{margin-left:auto;font-size:12px;color:var(--accent-ink);font-weight:600;align-self:center}
.wm{margin-left:auto;text-decoration:none;color:var(--ink);font-size:13px;letter-spacing:-.2px;opacity:.75}
.wm:hover{opacity:1}
.wm b{font-weight:700}
.wm i{color:var(--accent-ink);font-style:normal;font-weight:700}
.funnel{margin:8px 2px 0;font-size:12.5px;color:var(--ink2)}
.funnel b{color:var(--accent-ink)}
.cgroup .nm{font-weight:600}.cgroup .iso{font-size:11px;color:var(--ink2)}
@media(max-width:560px){ .quota{margin-left:0} .wm{margin-left:0} }

/* upsell CTA -> tradescope.fengtalk.ai */
.cta{display:flex;align-items:center;gap:14px;margin:16px 0 2px;padding:15px 18px;border-radius:14px;
  background:linear-gradient(135deg,var(--navy),#102138);color:#fff;text-decoration:none;
  box-shadow:var(--shadow);transition:.15s ease}
.cta:hover{transform:translateY(-1px);box-shadow:0 10px 28px rgba(27,54,93,.24)}
.cta-mk{font-size:20px;color:var(--accent);flex-shrink:0}
.cta-txt{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}
.cta-txt b{font-size:15.5px;font-weight:700;letter-spacing:.2px}
.cta-txt small{font-size:12px;color:#c7d2e0}
.cta-btn{flex-shrink:0;background:linear-gradient(135deg,var(--accent),var(--accent-ink));color:#fff;
  font-weight:700;font-size:13.5px;padding:10px 16px;border-radius:10px;white-space:nowrap}
.cta-lg{margin-top:14px}
@media(max-width:560px){.cta{flex-direction:column;align-items:flex-start}.cta-btn{width:100%;text-align:center}}

/* deep drill-down (nested) */
.row.grp{background:#faf8f4;cursor:default}
.row.grp .code,.row.grp .desc{color:var(--navy);font-weight:600}

/* header actions + header CTA button */
.hdr-actions{display:flex;align-items:center;gap:10px}
.hdr-cta{display:inline-block;background:linear-gradient(135deg,var(--accent),var(--accent-ink));color:#fff;
  text-decoration:none;font-weight:700;font-size:13px;padding:8px 14px;border-radius:9px;white-space:nowrap}
.hdr-cta:hover{filter:brightness(1.05)}
@media(max-width:560px){ .hdr-cta{padding:7px 10px;font-size:12px} .sub{display:none} }