:root{
  --ink-green:#0F2A24;
  --ink-green-2:#173D34;
  --ink-green-3:#2E5A4C;
  --gold:#C9A24A;
  --sand:#E8DCC0;
  --red:#D8391F;
  --paper:#F2EFE9;
  --ink:#14110E;
  --rock:#6E6A62;
  --mist:#DCE6E1;
  --container:1180px;
  --container-wide:1360px;
  --gutter:clamp(18px,4vw,56px);
  --r-lg:32px;
  --r-md:20px;
  --r-sm:12px;
  --pill:999px;
  --font-sans:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,"Courier New",monospace;
  --header-h:76px;
  --ease:.16s cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:clamp(15.5px,1.05vw,17px);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{
  margin:0 0 .6em;
  font-family:var(--font-sans);
  font-weight:800;
  line-height:1.06;
  letter-spacing:-.02em;
  color:var(--ink-green);
}
h1{font-size:clamp(38px,6vw,72px)}
h2{font-size:clamp(28px,4vw,44px)}
h3{font-size:clamp(20px,2.4vw,26px)}
h4{font-size:18px;letter-spacing:-.01em}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
a{color:var(--ink-green-3);text-decoration:none}
img,svg,picture,video{max-width:100%}
ul,ol{margin:0;padding:0}
main{display:block}
address{font-style:normal}
::selection{background:var(--gold);color:var(--ink-green)}
#main-content{scroll-margin-top:calc(var(--header-h) + 16px)}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:6px}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- layout utilities ---------- */
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--gutter)}
.container--wide{max-width:var(--container-wide)}
.section{padding-block:clamp(48px,7vw,96px)}
.section--tight{padding-block:clamp(28px,4vw,56px)}
.section--ink{background:var(--ink-green);color:var(--paper)}
.section--ink h1,.section--ink h2,.section--ink h3{color:var(--paper)}
.section--sand{background:var(--sand)}
.display{font-size:clamp(40px,7vw,88px);line-height:.96;letter-spacing:-.035em;font-weight:800;color:var(--ink-green);margin:0 0 .35em}
.lede{font-size:clamp(17px,2vw,20px);line-height:1.5;color:var(--ink-green-3);max-width:46ch;margin:0 0 1.2em}
.section-label{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--rock);margin:0 0 18px}
.section-label::before{content:"";width:22px;height:2px;background:var(--gold);border-radius:2px}
.note{margin:0 0 1em;padding-left:14px;border-left:2px solid var(--sand);font-size:13px;line-height:1.6;color:var(--rock)}
.rule{height:1px;border:0;margin:clamp(24px,3vw,40px) 0;background:rgba(20,17,14,.14)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border:1px solid transparent;border-radius:var(--pill);
  font-family:inherit;font-size:14px;font-weight:700;letter-spacing:.02em;
  text-decoration:none;cursor:pointer;
  transition:background-color var(--ease),color var(--ease),border-color var(--ease),transform var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn--sm{padding:9px 16px;font-size:13px}
.btn--block{width:100%}
.btn--gold{background:var(--gold);color:var(--ink-green)}
.btn--gold:hover{background:#d7b264}
.btn--ghost{background:transparent;border-color:currentColor;color:inherit}
.btn--ghost:hover{background:rgba(242,239,233,.14)}
.site-header[data-scrolled="true"] .btn--ghost:hover{background:rgba(20,17,14,.07)}
.btn--ink{background:var(--ink-green);color:var(--paper)}
.btn--ink:hover{background:var(--ink-green-2)}
.btn--outline{background:transparent;border-color:var(--ink-green-3);color:var(--ink-green-3)}
.btn--outline:hover{background:var(--mist)}

/* ---------- pills / tags ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border:1px solid transparent;border-radius:var(--pill);
  font-size:12px;font-weight:600;letter-spacing:.04em;
  background:var(--mist);color:var(--ink-green-2);
}
.pill--red{background:var(--red);color:#fff}
.pill--sand{background:var(--sand);color:var(--ink-green)}
.pill--outline{background:transparent;border-color:currentColor;color:var(--ink-green-3)}

/* ---------- media frames ---------- */
.media-frame{
  position:relative;overflow:hidden;isolation:isolate;
  border-radius:var(--r-lg);background:var(--ink-green-2);
  aspect-ratio:16/10;
}
.media-frame>img,.media-frame>picture,.media-frame>svg,.media-frame>video{
  display:block;width:100%;height:100%;object-fit:cover;
}
.media-frame[data-label]::after{
  content:attr(data-label);
  position:absolute;left:16px;bottom:16px;
  padding:6px 12px;border-radius:var(--pill);
  background:rgba(15,42,36,.74);color:var(--sand);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;
}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--sand{background:var(--sand)}

/* ---------- path rail ---------- */
.path-rail{position:relative;display:grid;gap:0;list-style:none;margin:0;padding:0}
.path-rail::before{
  content:"";position:absolute;left:31px;top:10px;bottom:10px;width:2px;border-radius:2px;
  background:linear-gradient(var(--gold),rgba(201,162,74,.16));
}
.path-node{position:relative;display:grid;grid-template-columns:64px minmax(0,1fr);gap:20px;padding:20px 0}
.node-num{
  position:relative;z-index:1;align-self:start;
  display:grid;place-items:center;width:64px;height:40px;
  border:1px solid rgba(201,162,74,.6);border-radius:var(--pill);
  background:var(--sand);color:var(--ink-green);
  font-family:var(--font-mono);font-size:13px;font-weight:600;letter-spacing:.06em;
  transition:background-color var(--ease),color var(--ease);
}
.path-node[data-active="true"] .node-num{background:var(--gold);color:var(--ink-green)}
.node-body{min-width:0}
.node-title{margin:0 0 6px;font-size:18px;font-weight:700;color:var(--ink-green);letter-spacing:-.01em}
.node-text{margin:0;font-size:14.5px;line-height:1.6;color:var(--rock)}

/* ---------- breadcrumbs ---------- */
.crumbs{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--rock);margin:0 0 20px}
.breadcrumb-list{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0;padding:0}
.breadcrumb-item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb-item+.breadcrumb-item::before{content:"/";color:rgba(110,106,98,.5)}
.breadcrumb-link{color:var(--ink-green-3);text-decoration:none}
.breadcrumb-link:hover{color:var(--ink-green);text-decoration:underline;text-underline-offset:2px}
.breadcrumb-item [aria-current="page"]{color:var(--ink);font-weight:600}

/* ---------- grids ---------- */
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2.4vw,32px)}
.split{display:grid;grid-template-columns:minmax(0,2.7fr) minmax(0,1fr);gap:clamp(24px,4vw,56px);align-items:start}
.split--flip{grid-template-columns:minmax(0,1fr) minmax(0,2.7fr)}

/* ---------- prose ---------- */
.prose{max-width:66ch;font-size:16.5px;line-height:1.68;color:var(--ink)}
.prose h2,.prose h3{margin-top:1.6em}
.prose ul,.prose ol{padding-left:1.2em;margin:0 0 1.2em}
.prose li{margin-bottom:.45em}
.prose a{color:var(--ink-green-3);text-decoration:underline;text-underline-offset:2px}
.prose blockquote{margin:1.6em 0;padding:18px 22px;background:var(--sand);border-left:3px solid var(--gold);border-radius:var(--r-md);font-size:15.5px;color:var(--ink-green-2)}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  --header-fg:#F2EFE9;
  --header-accent:#C9A24A;
  --header-line:rgba(242,239,233,.24);
  color:var(--header-fg);
  background:transparent;
  transition:background-color .24s ease,color .24s ease,box-shadow .24s ease;
}
.site-header[data-scrolled="true"]{
  background:var(--paper);
  --header-fg:var(--ink);
  --header-accent:var(--ink-green-3);
  --header-line:rgba(20,17,14,.16);
  box-shadow:0 1px 0 rgba(20,17,14,.1);
}
.site-header[data-open="true"]{
  background:var(--ink-green);
  --header-fg:var(--paper);
  --header-accent:var(--gold);
  --header-line:rgba(242,239,233,.2);
  box-shadow:none;
}
.read-progress{position:absolute;left:0;right:0;top:0;height:3px;overflow:hidden;pointer-events:none}
.read-progress-fill{
  display:block;height:100%;width:100%;
  background:var(--gold);transform:scaleX(0);transform-origin:0 50%;
  transition:transform .12s linear;
}
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:10px 18px;border-radius:var(--pill);
  background:var(--ink-green);color:var(--paper);
  font-size:13px;font-weight:700;letter-spacing:.04em;text-decoration:none;
  transform:translateY(-220%);
  transition:transform var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0)}
.header-shell{width:100%;max-width:var(--container-wide);margin-inline:auto;padding-inline:var(--gutter)}
.header-inner{display:flex;align-items:center;gap:clamp(12px,2vw,28px);min-height:var(--header-h)}
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:inherit;flex:none}
.brand-mark{
  display:grid;place-items:center;width:40px;height:40px;flex:none;
  border-radius:14px;background:var(--gold);color:var(--ink-green);
  font-size:17px;font-weight:800;line-height:1;
}
.brand-text{display:flex;flex-direction:column;gap:2px;line-height:1.1}
.brand-name{font-size:18px;font-weight:800;letter-spacing:.01em}
.brand-note{font-size:10.5px;letter-spacing:.14em;opacity:.72}
.header-chip{
  display:inline-flex;align-items:center;gap:8px;margin:0 0 0 auto;
  padding:6px 14px;border:1px solid var(--header-line);border-radius:var(--pill);
  font-size:12px;letter-spacing:.08em;white-space:nowrap;color:inherit;
}
.chip-dot{width:6px;height:6px;flex:none;border-radius:50%;background:var(--gold)}
.header-menu{display:flex;align-items:center;gap:clamp(12px,2vw,26px);margin-left:auto}
.primary-nav{min-width:0}
.nav-list{display:flex;align-items:center;gap:clamp(2px,1.2vw,16px);list-style:none;margin:0;padding:0}
.nav-item{display:block}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:10px 6px;border-radius:8px;
  font-size:14.5px;font-weight:600;letter-spacing:.01em;
  color:inherit;text-decoration:none;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:6px;right:6px;bottom:4px;height:2px;border-radius:2px;
  background:var(--header-accent);transform:scaleX(0);transform-origin:0 50%;
  transition:transform var(--ease);
}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--header-accent)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:8px}
.header-note{display:none;margin:0;font-size:12px;line-height:1.6;color:rgba(232,220,192,.68)}
.nav-toggle{
  display:none;align-items:center;gap:9px;margin-left:auto;
  padding:9px 16px;border:1px solid var(--header-line);border-radius:var(--pill);
  background:transparent;color:inherit;
  font-family:inherit;font-size:13px;font-weight:700;letter-spacing:.06em;cursor:pointer;
}
.nav-toggle:hover{background:rgba(242,239,233,.12)}
.site-header[data-scrolled="true"] .nav-toggle:hover{background:rgba(20,17,14,.07)}
.nav-toggle-icon{display:grid;gap:4px;width:16px}
.nav-toggle-bar{
  display:block;width:16px;height:2px;border-radius:2px;background:currentColor;
  transition:transform var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child{transform:translateY(-3px) rotate(-45deg)}

/* ---------- footer ---------- */
.site-footer{
  position:relative;overflow:hidden;
  background:var(--ink-green);color:#E8E2D4;
  padding-top:clamp(48px,7vw,96px);
}
.site-footer::before{
  content:"";position:absolute;right:-14%;bottom:-38%;
  width:min(560px,80vw);height:min(560px,80vw);
  border:1px solid rgba(201,162,74,.22);border-radius:50%;
  pointer-events:none;
}
.site-footer::after{
  content:"";position:absolute;left:-8%;top:-18%;
  width:min(340px,60vw);height:min(340px,60vw);
  border:1px solid rgba(232,220,192,.12);border-radius:50%;
  pointer-events:none;
}
.footer-shell{
  position:relative;z-index:1;
  width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--gutter);
}
.footer-top{
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1.5fr);
  gap:clamp(32px,5vw,72px);
  padding-bottom:clamp(32px,4vw,56px);
  border-bottom:1px solid rgba(232,220,192,.18);
}
.footer-brand{min-width:0}
.footer-mark{
  display:inline-grid;place-items:center;width:44px;height:44px;margin-bottom:18px;
  border-radius:14px;background:var(--gold);color:var(--ink-green);
  font-size:18px;font-weight:800;line-height:1;
}
.footer-title{margin:0 0 14px;font-size:clamp(26px,3.6vw,40px);font-weight:800;letter-spacing:-.02em;color:var(--paper)}
.footer-summary{max-width:34ch;margin:0;font-size:15px;line-height:1.6;color:rgba(242,239,233,.78)}
.footer-mail{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:22px}
.footer-mail-addr{
  padding-bottom:2px;border-bottom:1px dashed rgba(201,162,74,.5);
  font-family:var(--font-mono);font-size:14px;letter-spacing:.01em;color:var(--sand);
}
.copy-btn{
  padding:6px 14px;border:1px solid rgba(201,162,74,.55);border-radius:var(--pill);
  background:transparent;color:var(--gold);
  font-family:inherit;font-size:12px;font-weight:700;letter-spacing:.05em;cursor:pointer;
  transition:background-color var(--ease),color var(--ease);
}
.copy-btn:hover{background:rgba(201,162,74,.16)}
.copy-status{font-size:12px;color:var(--sand);opacity:.9}
.copy-status:empty{display:none}
.footer-hours{margin:14px 0 0;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:rgba(232,220,192,.6)}
.footer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(24px,3vw,40px)}
.footer-col{min-width:0}
.footer-col-title{
  margin:0 0 14px;font-size:11.5px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:var(--gold);
}
.footer-links{display:grid;gap:10px;list-style:none;margin:0;padding:0}
.footer-link{
  display:inline-block;font-size:15px;color:rgba(242,239,233,.82);text-decoration:none;
  border-bottom:1px solid transparent;transition:color var(--ease),border-color var(--ease);
}
.footer-link:hover{color:var(--gold);border-bottom-color:rgba(201,162,74,.6)}
.footer-contact{display:grid;gap:12px}
.contact-line{display:grid;gap:2px}
.contact-label{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:rgba(201,162,74,.9)}
.contact-value{font-size:14.5px;line-height:1.5;color:rgba(242,239,233,.86);overflow-wrap:anywhere}
.footer-bottom{
  position:relative;z-index:1;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  width:100%;max-width:var(--container);margin:0 auto;
  padding:22px var(--gutter) 30px;
  border-top:1px solid rgba(232,220,192,.12);
}
.footer-copy{margin:0;font-size:12.5px;color:rgba(242,239,233,.58)}
.footer-legal{display:flex;flex-wrap:wrap;gap:18px;list-style:none;margin:0;padding:0}
.footer-legal-link{font-size:13px;color:rgba(242,239,233,.72);text-decoration:none;transition:color var(--ease)}
.footer-legal-link:hover{color:var(--gold)}
.footer-icp{margin:0;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.02em;color:rgba(242,239,233,.6)}

/* ---------- reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .24s ease,transform .24s ease}
[data-reveal][data-revealed="true"]{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .header-chip{display:none}
}
@media (max-width:1040px){
  .nav-toggle{display:inline-flex}
  .header-menu{display:none}
  .site-header[data-open="true"] .header-menu{
    display:flex;flex-direction:column;align-items:stretch;gap:14px;
    position:absolute;top:100%;left:0;right:0;margin:0;
    max-height:calc(100vh - var(--header-h));overflow-y:auto;
    padding:18px var(--gutter) 28px;
    background:var(--ink-green);color:var(--paper);
    border-radius:0 0 24px 24px;
    box-shadow:0 24px 48px rgba(15,42,36,.34);
  }
  .site-header[data-open="true"] .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .site-header[data-open="true"] .nav-link{
    justify-content:space-between;width:100%;
    padding:15px 2px;border-radius:0;border-bottom:1px solid rgba(232,220,192,.16);
    font-size:16.5px;color:var(--paper);
  }
  .site-header[data-open="true"] .nav-link::after{display:none}
  .site-header[data-open="true"] .nav-link[aria-current="page"]{color:var(--gold)}
  .site-header[data-open="true"] .header-actions{flex-wrap:wrap;gap:10px;margin-top:4px}
  .site-header[data-open="true"] .btn--ghost{color:var(--paper);border-color:rgba(242,239,233,.5)}
  .site-header[data-open="true"] .header-note{display:block}
  .footer-top{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:860px){
  .split,.split--flip{grid-template-columns:1fr}
  .path-rail::before{left:25px}
  .path-node{grid-template-columns:52px minmax(0,1fr);gap:14px}
  .node-num{width:52px;height:36px;font-size:12px}
}
@media (max-width:560px){
  .site-header{--header-h:64px}
  .brand-note{display:none}
  .brand-mark{width:36px;height:36px;border-radius:12px;font-size:15px}
  .brand-name{font-size:16.5px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:14px}
  .media-frame{border-radius:var(--r-md)}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
  [data-reveal]{opacity:1 !important;transform:none !important}
  .read-progress-fill{transition:none}
  .btn:hover{transform:none}
}