/* Bactrian Partners — production build of Claude Design direction 2b "The Institution"
   Source of truth: design/HANDOFF.md. Do not restyle without a design-side update. */

:root{
  --bg:#ECEAE1; --panel:#F6F5EF; --panel-alt:#E4E2D6;
  --ink:#17201B; --green:#1F4D3A; --pos:#1F6B3E; --cta:#3FA167;
  --neg:#B23A2E; --body:#3c453e; --cap:#5b6560; --mut:#8a9089;
  --hair:#d4d2c6; --hair2:#dcdacd; --hair3:#e2e0d4;
  --arch:'Archivo',sans-serif; --serif:'Source Serif 4',Georgia,serif;
  --mono:'IBM Plex Mono',monospace; --zh-sans:'Noto Sans SC',sans-serif; --zh-serif:'Noto Serif SC',serif;
  --wordmark:'Spectral',Georgia,serif;
  --maxw:1240px; --pad:28px;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{background:var(--bg)}
body{font-family:var(--serif);color:var(--ink);-webkit-font-smoothing:antialiased}
a{color:var(--green);text-decoration:none}
a:hover{color:var(--ink)}
table{border-collapse:collapse}
::selection{background:rgba(31,77,58,.16)}
button{font-family:var(--arch)}

/* bilingual */
html[data-lang=en] .zh{display:none!important}
html[data-lang=zh] .en{display:none!important}
.zh{font-family:var(--zh-sans)}
h1 .zh,h2 .zh,.zh-serif .zh{font-family:var(--zh-serif)}

.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}

/* type utilities */
.lbl{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--mut)}
.kicker{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.kicker span:first-child{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--green)}
.kicker .rule{height:1px;flex:0 0 48px;background:var(--green)}
.badge-preview{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--neg)}

/* buttons */
.btn{display:inline-block;font-family:var(--arch);letter-spacing:.03em;cursor:pointer;border:none;text-align:center}
.btn-ink{background:var(--ink);color:#ECEAE1;font-size:14px;font-weight:700;padding:14px 24px}
.btn-outline{background:transparent;color:var(--ink);border:1px solid var(--ink);font-size:14px;font-weight:600;padding:14px 24px}
.btn-forest{background:var(--green);color:#EEF0E9;font-size:12px;font-weight:600;padding:8px 15px}
.btn-forest.lg{font-size:13px;padding:9px 16px}
.btn-green{background:var(--cta);color:#0c140f;font-size:13px;font-weight:700;letter-spacing:.04em;padding:12px 22px}
.btn-ghost-dark{background:transparent;color:#ECEAE1;border:1px solid #47564d;font-size:13px;font-weight:600;letter-spacing:.04em;padding:12px 22px}

/* header */
.site-head{position:sticky;top:0;z-index:20;background:rgba(236,234,225,.92);backdrop-filter:blur(8px);border-bottom:3px solid var(--ink)}
.site-head .in{display:flex;justify-content:space-between;align-items:center;padding-top:18px;padding-bottom:18px}
.brand{display:flex;align-items:center;gap:13px;color:inherit}
.brand-name{font-family:var(--arch);font-weight:800;font-size:23px;letter-spacing:-.02em;color:var(--ink)}
.brand-name i{font-style:normal;color:var(--green)}
.nb-nav{display:flex;align-items:center;gap:22px;font-family:var(--arch);font-size:13px;font-weight:500;letter-spacing:.02em;color:var(--body)}
.nb-nav a{color:var(--body)}
.nb-nav a.active{color:var(--green);font-weight:700}
.btn-lang{border:1px solid var(--ink);background:var(--ink);color:var(--bg);font-size:11px;font-weight:600;letter-spacing:.06em;padding:6px 12px;cursor:pointer}
.nb-menu{display:none}

/* identity lockup — mark 1a 双拱/Gate. Spec: design/logo/LOGO_HANDOFF.md (normative).
   --s scales the whole horizontal lockup uniformly; never restyle the parts individually. */
.lockup{--s:1;display:flex;align-items:center;gap:0;color:inherit}
.lockup .mk{display:block;flex:none;width:calc(84px * var(--s));height:auto}
.lockup .rule{flex:none;width:1px;height:calc(44px * var(--s));background:rgba(42,39,35,.2);margin:0 calc(22px * var(--s))}
.lockup .wm b{display:block;font-family:var(--wordmark);font-weight:500;font-size:calc(25px * var(--s));line-height:1;letter-spacing:.16em;text-transform:uppercase;color:#2A2723}
.lockup .wm i{display:block;font-style:normal;font-family:var(--mono);font-weight:400;font-size:calc(11px * var(--s));line-height:1;letter-spacing:.34em;text-transform:uppercase;color:#6E6559;margin-top:calc(5px * var(--s))}
.site-head .lockup{--s:.75}
.site-foot .lockup{--s:.6;margin-bottom:10px}
/* mark alone, reversed, on the ink CTA band — same rule idiom as the lockup */
.cta-band .cta-lead{display:flex;align-items:center}
.cta-band .cta-mk{display:block;flex:none;width:46px;height:auto}
.cta-band .cta-rule{flex:none;width:1px;height:40px;background:rgba(236,234,225,.22);margin:0 20px}
.lockup .wm-tag{font-family:var(--mono);font-size:11px;font-weight:500;color:var(--neg);letter-spacing:.1em;margin-left:12px}

/* summary strip */
.nb-sum{display:flex;align-items:stretch;border-top:1px solid var(--hair);border-bottom:1px solid var(--hair);font-family:var(--arch)}
.nb-sum>div{flex:1;padding:16px 24px;border-right:1px solid var(--hair2)}
.nb-sum>div:first-child{padding-left:0}
.nb-sum>div:last-child{border-right:none;padding-right:0}
.nb-sum b{display:block;font-size:28px;font-weight:800;color:var(--ink);margin-top:2px}
.nb-sum b.pos{color:var(--pos)}

/* chips */
.chip{font-family:var(--arch);font-size:11px;font-weight:600;letter-spacing:.04em;padding:6px 13px;cursor:pointer;background:transparent;color:var(--cap);border:1px solid #cdcbbe}
.chip.active{background:var(--green);color:#EEF0E9;border-color:var(--green)}

/* marks table */
.nb-scroll{overflow-x:auto}
.nb-scroll::-webkit-scrollbar{height:8px}
.nb-scroll::-webkit-scrollbar-thumb{background:#c9c7ba}
.mkt-table{width:100%;min-width:720px;font-size:15px}
.mkt-table thead tr{border-bottom:2px solid var(--ink);font-family:var(--arch);font-size:10.5px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--cap)}
.mkt-table th{text-align:right;padding:11px}
.mkt-table th:first-child{text-align:left;padding:11px 8px 11px 0}
.mkt-table th:last-child{padding:11px 0 11px 8px;width:132px}
.mkt-table tbody tr{border-bottom:1px solid var(--hair2)}
.mkt-table td{text-align:right;padding:13px 8px;font-family:var(--mono)}
.mkt-table td:first-child{text-align:left;padding:13px 8px 13px 0}
.mkt-table td:last-child{padding:13px 0 13px 8px;color:#8f9589}
.mkt-name{font-family:var(--arch);font-weight:600;font-size:16px;color:var(--ink)}
.mkt-tag{font-family:var(--mono);font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--mut)}
.mkt-px{font-size:15px;color:var(--ink)}
.mkt-spread{font-family:var(--mono);font-size:11.5px;color:var(--cap);margin-top:3px}
.mkt-val{font-size:14px;color:#2c352f}
.up{color:var(--pos)}
.down{color:var(--neg)}
.dim{color:#a7ad9f}
.ask-link{cursor:pointer;color:var(--green);border-bottom:1px dotted var(--green)}

/* panels / locked */
.panel{border:1px solid var(--hair);background:var(--panel)}
.locked-card{position:relative;padding:26px 28px;overflow:hidden}
.locked-title{font-family:var(--arch);font-size:11px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--green);margin-bottom:16px}
.locked-vals{font-family:var(--mono);color:var(--ink)}
.blur{filter:blur(7px);user-select:none;pointer-events:none}
.locked-foot{display:flex;align-items:center;gap:12px;margin-top:22px;padding-top:16px;border-top:1px solid var(--hair3)}
.locked-pill{display:inline-flex;align-items:center;gap:7px;background:var(--ink);color:#ECEAE1;font-family:var(--arch);font-size:11px;font-weight:600;letter-spacing:.04em;padding:5px 10px}

/* CTA bands */
.cta-band{background:var(--ink);color:#ECEAE1}
.cta-band.green{background:var(--cta);color:#0c140f}
.cta-band .in{display:flex;align-items:center;justify-content:space-between;gap:28px;padding-top:30px;padding-bottom:30px}
.cta-band .t{font-family:var(--arch);font-weight:700;font-size:24px}
.cta-band .sub{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:#93a49a;margin-top:5px}
.cta-band .btns{display:flex;gap:12px;flex-shrink:0;flex-wrap:wrap}

/* footer */
.site-foot{background:var(--panel-alt);border-top:3px solid var(--ink)}
.site-foot .top{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;margin-bottom:26px;padding-top:34px}
.site-foot .blurb{font-size:13px;line-height:1.55;color:#4b544d;max-width:320px}
.site-foot .cols{display:flex;gap:56px;flex-wrap:wrap;font-family:var(--arch);font-size:13px}
.site-foot .col{display:flex;flex-direction:column;gap:9px}
.site-foot .col a{cursor:pointer}
.site-foot .disc{border-top:1px solid #cfcdc0;padding-top:18px;padding-bottom:26px;font-size:11.5px;line-height:1.6;color:#4b544d;font-family:var(--serif)}
.site-foot .disc b{color:var(--ink)}
.site-foot .fine{margin-top:10px;font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;color:var(--mut)}

/* drawer */
@keyframes nbFade{from{opacity:0}to{opacity:1}}
@keyframes nbSlide{from{transform:translateX(28px);opacity:.4}to{transform:translateX(0);opacity:1}}
.nb-overlay{position:fixed;inset:0;z-index:9000;background:rgba(23,32,27,.55);display:flex;justify-content:flex-end;animation:nbFade .18s ease;font-family:var(--serif)}
.nb-drawer{width:min(480px,100%);height:100%;background:var(--bg);border-left:3px solid var(--ink);overflow-y:auto;animation:nbSlide .24s cubic-bezier(.2,.7,.3,1)}
.nb-drawer .head{display:flex;justify-content:space-between;align-items:flex-start;padding:26px 30px 20px 30px;border-bottom:3px solid var(--ink)}
.nb-drawer .x{flex-shrink:0;margin-left:12px;background:transparent;border:1px solid var(--ink);color:var(--ink);width:32px;height:32px;font-size:18px;cursor:pointer;line-height:1}
.nb-field{width:100%;font-family:var(--serif);font-size:15px;color:var(--ink);background:var(--panel);border:1px solid #cdcbbe;padding:10px 12px;outline:none}
.nb-field:focus{border-color:var(--green);background:#fff}
.f-label{font-family:var(--arch);font-size:11px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--cap)}

/* responsive */
@media(max-width:860px){
  .nb-nav{display:none!important}
  #story-grid{grid-template-columns:1fr!important;gap:20px!important}
  .nb-menu{display:inline-block!important}
  .nb-hero{grid-template-columns:1fr!important;flex-direction:column!important;gap:16px!important}
  .nb-lines{grid-template-columns:1fr!important}
  .nb-steps{grid-template-columns:1fr 1fr!important}
  .nb-lockgrid{grid-template-columns:1fr!important}
  .nb-priceblock{grid-template-columns:1fr 1fr!important}
  .nb-facts{grid-template-columns:1fr 1fr!important}
  .cta-band .in{flex-direction:column!important;align-items:flex-start!important}
  .site-head .lockup{--s:.55}
  .cta-band .cta-mk,.cta-band .cta-rule{display:none!important}
  .nb-sum{flex-wrap:wrap!important}
  .nb-sum>div{flex:1 0 44%!important;border-right:none!important}
}