:root{
  --green:#1E7A4F;
  --green-deep:#14523A;
  --orange:#F26A2E;
  --orange-bright:#FF8A4C;
  --ink:#0B1B2B;
  --ink-2:#13293D;
  --sand:#F4F1E8;
  --paper:#FCFBF7;
  --cyan:#2FD3B3;
  --grey:#8A949C;
  --muted:#59656F;
  --red:#D94A3D;
  --line:rgba(11,27,43,.14);
  --line-soft:rgba(11,27,43,.08);
  --line-light:rgba(252,251,247,.18);
  --shell:1240px;
  --gutter:clamp(16px,4vw,40px);
  --gap:clamp(20px,3vw,36px);
  --font-sans:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","Roboto Mono","SFMono-Regular",Menlo,Consolas,monospace;
  --ease:180ms ease;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
img,svg,picture{max-width:100%;display:block}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:3px solid var(--orange);outline-offset:3px;border-radius:2px}

@media (prefers-reduced-motion: no-preference){
  html{scroll-behavior:smooth}
}

body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{font-weight:800;line-height:1.2;letter-spacing:-.005em}
p{max-width:76ch}

/* ---------- layout ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(52px,7vw,104px)}
.section--sand{background:var(--sand)}
.section--ink{background:var(--ink);color:var(--paper)}
.section--green{background:var(--green-deep);color:var(--paper)}
.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:1rem 2rem;
  margin-block-end:clamp(24px,4vw,44px);
}
.divider{height:1px;border:0;background:var(--line);margin-block:clamp(24px,4vw,40px)}
.section--ink .divider,.section--green .divider{background:var(--line-light)}

.grid{display:grid;gap:var(--gap)}
.grid--split{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}
.grid--halves{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--thirds{grid-template-columns:repeat(3,minmax(0,1fr))}

/* ---------- type ---------- */
.display{
  font-family:var(--font-sans);
  font-weight:900;
  font-size:clamp(2rem,4.6vw,3.6rem);
  line-height:1.06;
  letter-spacing:-.015em;
}
.lede{
  font-size:clamp(1.02rem,1.6vw,1.18rem);
  line-height:1.7;
  max-width:34em;
  color:var(--muted);
}
.section--ink .lede,.section--green .lede,.panel--ink .lede,.glass--dark .lede{color:rgba(252,251,247,.8)}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.6em;
  font-size:.76rem;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--green);
}
.section--ink .eyebrow,.section--green .eyebrow{color:var(--cyan)}
.label{
  font-size:.75rem;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--muted);
}
.section--ink .label,.section--green .label{color:rgba(252,251,247,.62)}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:600;
  letter-spacing:0;
}
.note-rotated{
  writing-mode:vertical-rl;
  font-size:.75rem;
  font-weight:600;
  letter-spacing:.26em;
  color:var(--muted);
  line-height:1;
}
.prose{max-width:70ch}
.prose p + p{margin-block-start:1em}
.prose h2,.prose h3{margin-block:1.6em .6em}
.prose a{color:var(--green-deep);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--green)}

/* ---------- buttons & links ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  padding:.72em 1.35em;
  font-size:.95rem;
  font-weight:700;
  letter-spacing:.03em;
  line-height:1.2;
  border:2px solid transparent;
  border-radius:2px;
  transition:background var(--ease),border-color var(--ease),color var(--ease);
}
.btn--solid{background:var(--green);border-color:var(--green);color:var(--paper)}
.btn--solid:hover{background:var(--green-deep);border-color:var(--green-deep)}
.btn--orange{background:var(--orange);border-color:var(--orange);color:var(--ink)}
.btn--orange:hover{background:var(--orange-bright);border-color:var(--orange-bright)}
.btn--ghost{background:transparent;border-color:currentColor;color:inherit}
.btn--ghost:hover{border-color:var(--orange);color:var(--orange)}
.btn--sm{padding:.45em 1em;font-size:.82rem}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:.45em;
  font-weight:700;
  border-block-end:2px solid transparent;
  transition:border-color var(--ease),color var(--ease);
}
.link-arrow::after{content:"→";font-family:var(--font-mono);font-weight:600}
.link-arrow:hover{border-block-end-color:var(--orange);color:var(--green-deep)}
.section--ink .link-arrow:hover,.section--green .link-arrow:hover{color:var(--paper)}

/* ---------- breadcrumbs ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.45em;
  font-size:.8rem;
  letter-spacing:.06em;
  color:var(--muted);
  margin-block-end:1.25rem;
}
.crumbs__item + .crumbs__item::before{content:"/";margin-inline-end:.45em;color:var(--grey)}
.crumbs a{transition:color var(--ease)}
.crumbs a:hover{color:var(--green-deep);text-decoration:underline;text-underline-offset:3px}

/* ---------- panels ---------- */
.panel{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:2px;
  padding:clamp(20px,3vw,32px);
  transition:border-color var(--ease),background var(--ease);
}
.panel:hover{border-color:var(--orange)}
.panel--ink{background:var(--ink-2);border-color:rgba(252,251,247,.16);color:var(--paper)}
.panel--ink:hover{border-color:var(--orange)}
.glass{
  background:rgba(252,251,247,.74);
  border:1px solid rgba(11,27,43,.12);
  border-radius:2px;
  backdrop-filter:blur(10px);
  padding:clamp(16px,2.4vw,24px);
}
.glass--dark{
  background:rgba(19,41,61,.64);
  border:1px solid rgba(252,251,247,.2);
  color:var(--paper);
  border-radius:2px;
  backdrop-filter:blur(10px);
  padding:clamp(16px,2.4vw,24px);
}

/* ---------- media ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  border-radius:2px;
  aspect-ratio:16/9;
  background:
    radial-gradient(circle at 78% 18%,rgba(47,211,179,.28),transparent 58%),
    linear-gradient(135deg,var(--green) 0%,var(--green-deep) 46%,var(--ink) 100%);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame--board::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(to right,rgba(252,251,247,.16) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(252,251,247,.16) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.7;
}
.media-frame > img,
.media-frame > picture > img,
.media-frame > video{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media-frame__caption{
  position:absolute;
  inset-inline:0;
  inset-block-end:0;
  padding:.6em .9em;
  background:rgba(11,27,43,.74);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.06em;
}

/* ---------- chips ---------- */
.chip-row{display:flex;flex-wrap:wrap;gap:.5rem}
.chip{
  display:inline-flex;
  align-items:center;
  gap:.4em;
  padding:.45em .95em;
  font-size:.82rem;
  font-weight:600;
  letter-spacing:.04em;
  border:1px solid var(--line);
  border-radius:999px;
  background:var(--paper);
  color:var(--ink);
  transition:border-color var(--ease),background var(--ease),color var(--ease);
}
.chip:hover{border-color:var(--orange)}
.chip[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.section--ink .chip,.glass--dark .chip{background:transparent;border-color:rgba(252,251,247,.3);color:var(--paper)}
.section--ink .chip[aria-pressed="true"],.glass--dark .chip[aria-pressed="true"]{background:var(--paper);border-color:var(--paper);color:var(--ink)}

/* ---------- possession range bar ---------- */
.range-bar{
  display:flex;
  gap:3px;
  height:14px;
  border-radius:2px;
  overflow:hidden;
  background:var(--line-soft);
}
.range-bar__seg{
  flex:1;
  border-radius:1px;
  background:var(--grey);
  transition:filter var(--ease),transform var(--ease);
}
.range-bar__seg:nth-child(1){background:var(--cyan)}
.range-bar__seg:nth-child(2){background:var(--green)}
.range-bar__seg:nth-child(3){background:var(--grey)}
.range-bar__seg:nth-child(4){background:var(--orange)}
.range-bar__seg:nth-child(5){background:var(--orange-bright)}
.range-bar__seg:hover{filter:brightness(1.12)}

/* ---------- accordion ---------- */
.fold{border-block:1px solid var(--line)}
.fold + .fold{border-block-start:0}
.fold__title{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  padding-block:1.05rem;
  font-weight:700;
  cursor:pointer;
  list-style:none;
}
.fold__title::-webkit-details-marker{display:none}
.fold__title::after{
  content:"+";
  font-family:var(--font-mono);
  font-size:1.25rem;
  line-height:1;
  color:var(--orange);
}
.fold[open] .fold__title::after{content:"−"}
.fold__body{
  padding-block-end:1.2rem;
  max-width:72ch;
  color:var(--muted);
}
.section--ink .fold,.section--green .fold{border-color:var(--line-light)}
.section--ink .fold__body,.section--green .fold__body{color:rgba(252,251,247,.78)}

/* ---------- table ---------- */
.data-table{width:100%;font-size:.92rem}
.data-table caption{
  text-align:left;
  font-size:.78rem;
  letter-spacing:.14em;
  color:var(--muted);
  padding-block-end:.7rem;
}
.data-table th,
.data-table td{
  padding:.7rem .8rem;
  text-align:left;
  border-block-end:1px solid var(--line);
  vertical-align:top;
}
.data-table thead th{
  background:var(--line-soft);
  font-size:.74rem;
  font-weight:600;
  letter-spacing:.12em;
  color:var(--muted);
}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:.35em;
  padding:.2em .7em;
  font-size:.74rem;
  font-weight:600;
  letter-spacing:.08em;
  line-height:1.6;
  border:1px solid currentColor;
  border-radius:999px;
  color:var(--green-deep);
}
.tag--orange{color:var(--ink);background:var(--orange);border-color:var(--orange)}
.tag--ink{color:var(--paper);border-color:rgba(252,251,247,.45)}

/* ---------- header ---------- */
.site-head{position:relative;z-index:70}
.skip-link{
  position:absolute;
  top:-100px;
  left:var(--gutter);
  z-index:200;
  padding:.7rem 1.1rem;
  background:var(--orange);
  color:var(--ink);
  font-weight:700;
  font-size:.9rem;
  border-radius:0 0 2px 2px;
  transition:top var(--ease);
}
.skip-link:focus{top:0}

.head-rail{
  background:var(--sand);
  border-block-end:1px solid var(--line);
  position:relative;
}
.head-rail::before{
  content:"";
  position:absolute;
  inset-block-start:0;
  inset-inline:0;
  height:3px;
  background:linear-gradient(90deg,var(--green) 0 46%,var(--orange) 46% 58%,var(--ink) 58% 100%);
}
.head-rail__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem 1.4rem;
  padding-block:.6rem;
  font-size:.78rem;
}
.head-rail__tagline{
  font-weight:700;
  letter-spacing:.14em;
  color:var(--green-deep);
  max-width:none;
}
.head-rail__status{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  color:rgba(11,27,43,.7);
  letter-spacing:.02em;
  max-width:none;
}
.status-dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(47,211,179,.22);
  flex:none;
}
.head-rail__routes{display:flex;gap:.55rem;margin-inline-start:auto}
.route-btn{
  display:inline-flex;
  align-items:center;
  padding:.34em .95em;
  font-size:.78rem;
  font-weight:700;
  letter-spacing:.08em;
  border-radius:2px;
  border:1px solid var(--orange);
  background:var(--orange);
  color:var(--ink);
  transition:background var(--ease),border-color var(--ease),color var(--ease);
}
.route-btn:hover{background:var(--orange-bright);border-color:var(--orange-bright)}
.route-btn--alt{background:transparent;border-color:rgba(20,82,58,.4);color:var(--green-deep)}
.route-btn--alt:hover{background:var(--green-deep);border-color:var(--green-deep);color:var(--paper)}

.head-bar{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--ink);
  color:var(--paper);
  border-block-end:1px solid rgba(252,251,247,.12);
}
.head-bar__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.6rem 1.5rem;
  min-height:72px;
  padding-block:.6rem;
}
.brand-lock{display:inline-flex;align-items:center;gap:.7rem;color:var(--paper)}
.brand-lock__mark{
  position:relative;
  width:34px;
  height:34px;
  flex:none;
  background:var(--green);
  border-radius:2px;
  transition:background var(--ease);
}
.brand-lock__mark::before,
.brand-lock__mark::after{
  content:"";
  position:absolute;
  inset-inline:7px;
  height:3px;
  background:var(--paper);
}
.brand-lock__mark::before{inset-block-start:8px}
.brand-lock__mark::after{inset-block-end:8px;background:var(--orange)}
.brand-lock:hover .brand-lock__mark{background:var(--green-deep)}
.brand-lock__text{display:flex;flex-direction:column;line-height:1.16}
.brand-lock__name{font-size:1.12rem;font-weight:900;letter-spacing:.06em}
.brand-lock__sub{font-size:.68rem;letter-spacing:.14em;color:rgba(252,251,247,.62)}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  margin-inline-start:auto;
  padding:.48rem .7rem;
  border:1px solid rgba(252,251,247,.35);
  border-radius:2px;
  color:var(--paper);
  transition:border-color var(--ease),color var(--ease);
}
.nav-toggle:hover{border-color:var(--orange);color:var(--orange)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;justify-content:space-between;width:18px;height:12px}
.nav-toggle__bars > span{
  display:block;
  height:2px;
  background:currentColor;
  transition:transform var(--ease),opacity var(--ease);
}
.nav-toggle__label{font-size:.76rem;font-weight:700;letter-spacing:.12em}
.nav-toggle[data-open]{border-color:var(--orange);color:var(--orange)}
.nav-toggle[data-open] .nav-toggle__bars > span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[data-open] .nav-toggle__bars > span:nth-child(2){opacity:0}
.nav-toggle[data-open] .nav-toggle__bars > span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.nav-strip{margin-inline-start:auto}
.nav-list{display:flex;align-items:center;gap:.15rem;flex-wrap:wrap}
.nav-link{
  position:relative;
  display:inline-block;
  padding:.55rem .78rem;
  font-size:.92rem;
  font-weight:600;
  letter-spacing:.04em;
  color:rgba(252,251,247,.82);
  border-block-end:3px solid transparent;
  transition:color var(--ease),border-color var(--ease);
}
.nav-link:hover{color:var(--paper);border-block-end-color:var(--orange)}
.nav-link[aria-current="page"]{color:var(--paper);border-block-end-color:var(--orange)}

.scroll-track{
  position:absolute;
  inset-inline:0;
  inset-block-end:-1px;
  height:2px;
  background:rgba(252,251,247,.12);
  overflow:hidden;
}
.scroll-track__fill{
  display:block;
  width:0;
  height:100%;
  background:var(--orange);
  transition:width 120ms linear;
}

/* ---------- footer ---------- */
.site-foot{
  background:var(--green-deep);
  color:var(--paper);
  border-block-start:4px solid var(--green);
  margin-block-start:0;
}
.foot-top{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.35fr);
  gap:clamp(28px,5vw,64px);
  padding-block:clamp(42px,6vw,72px);
}
.foot-brand__name{font-size:1.45rem;font-weight:900;letter-spacing:.05em}
.foot-brand__line{
  margin-block-start:.75rem;
  max-width:26ch;
  font-size:.95rem;
  color:rgba(252,251,247,.76);
}
.foot-routes{display:flex;flex-wrap:wrap;gap:.6rem;margin-block-start:1.4rem}
.foot-route{
  display:inline-flex;
  align-items:center;
  padding:.5em 1.1em;
  font-size:.82rem;
  font-weight:700;
  letter-spacing:.06em;
  border:1px solid rgba(252,251,247,.45);
  border-radius:2px;
  color:var(--paper);
  transition:background var(--ease),border-color var(--ease),color var(--ease);
}
.foot-route:first-child{background:var(--orange);border-color:var(--orange);color:var(--ink)}
.foot-route:first-child:hover{background:var(--orange-bright);border-color:var(--orange-bright)}
.foot-route:hover{border-color:var(--orange);color:var(--orange)}

.foot-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,3vw,40px)}
.foot-col__title{
  font-size:.74rem;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--cyan);
  margin-block-end:.9rem;
}
.foot-list{display:flex;flex-direction:column;gap:.55rem}
.foot-link{
  display:inline-block;
  font-size:.94rem;
  color:rgba(252,251,247,.82);
  border-block-end:1px solid transparent;
  transition:color var(--ease),border-color var(--ease);
}
.foot-link:hover{color:var(--paper);border-block-end-color:var(--orange)}

.foot-contact{
  border-block-start:1px solid rgba(252,251,247,.2);
  padding-block:clamp(24px,4vw,38px);
}
.foot-contact__label{
  font-size:.74rem;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--cyan);
  max-width:none;
}
.foot-contact__list{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
  gap:.85rem 2rem;
  margin-block-start:.85rem;
}
.foot-contact__item{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:.5rem;
  font-size:.9rem;
  color:rgba(252,251,247,.86);
}
.foot-contact__key{
  min-width:3em;
  font-size:.72rem;
  letter-spacing:.14em;
  color:rgba(252,251,247,.55);
}
.foot-mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:.86rem;
  letter-spacing:.01em;
  color:var(--paper);
  word-break:break-word;
}
.foot-note{
  margin-block-start:1rem;
  max-width:66ch;
  font-size:.82rem;
  line-height:1.7;
  color:rgba(252,251,247,.66);
}
.copy-btn{
  display:inline-flex;
  align-items:center;
  padding:.12em .62em;
  font-size:.7rem;
  font-weight:700;
  letter-spacing:.1em;
  border:1px solid rgba(252,251,247,.4);
  border-radius:999px;
  color:rgba(252,251,247,.86);
  transition:background var(--ease),border-color var(--ease),color var(--ease);
}
.copy-btn:hover{border-color:var(--orange);color:var(--orange)}
.copy-btn[data-copied="ok"]{background:var(--cyan);border-color:var(--cyan);color:var(--ink)}
.copy-btn[data-copied="fail"]{background:var(--red);border-color:var(--red);color:var(--paper)}

.legal-strip{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.6rem 1.4rem;
  padding-block:1.05rem;
  border-block-start:1px solid rgba(252,251,247,.2);
  font-size:.78rem;
  color:rgba(252,251,247,.72);
}
.legal-strip__icp{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.03em;
  color:var(--paper);
}
.legal-strip__copyright{margin-inline-start:auto;letter-spacing:.04em}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .grid--split{grid-template-columns:minmax(0,6fr) minmax(0,6fr)}
  .grid--thirds{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .nav-strip{
    display:none;
    flex:1 0 100%;
    margin-inline-start:0;
    padding-block:.5rem .9rem;
    border-block-start:1px solid rgba(252,251,247,.14);
  }
  .nav-strip[data-open]{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-link{
    display:block;
    padding:.72rem .3rem;
    border-block-end:1px solid rgba(252,251,247,.1);
    border-inline-start:3px solid transparent;
  }
  .nav-link:hover,
  .nav-link[aria-current="page"]{
    border-block-end-color:rgba(252,251,247,.1);
    border-inline-start-color:var(--orange);
    color:var(--paper);
  }
  .grid--split,
  .grid--halves{grid-template-columns:minmax(0,1fr)}
  .foot-top{grid-template-columns:minmax(0,1fr)}
  .head-rail__routes{margin-inline-start:0}
}

@media (min-width:901px){
  .nav-toggle{display:none}
}

@media (max-width:680px){
  body{font-size:16px}
  .head-rail__inner{gap:.4rem .9rem;font-size:.74rem}
  .head-rail__status{order:3;flex:1 0 100%}
  .head-bar__inner{min-height:64px;gap:.5rem 1rem}
  .brand-lock__sub{display:none}
  .grid--thirds{grid-template-columns:minmax(0,1fr)}
  .foot-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .legal-strip__copyright{margin-inline-start:0;flex:1 0 100%}
}

@media (max-width:400px){
  .foot-cols{grid-template-columns:minmax(0,1fr)}
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .scroll-track__fill{transition:none}
  .nav-toggle[data-open] .nav-toggle__bars > span{transition:none}
}