:root{
  --forest:#0B2A22;
  --forest-deep:#071E18;
  --pitch:#1F6B45;
  --paper:#F3EDE1;
  --cold:#F8FBF9;
  --mist:#D7DFD9;
  --ember:#E94F2E;
  --ember-deep:#D33F21;
  --signal:#F2C14E;
  --ink:#111815;
  --sage:#8CA79A;
  --paper-deep:#D9CFBE;

  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-serif:"Songti SC","Noto Serif SC","Source Han Serif SC",Georgia,"Times New Roman",serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"IBM Plex Mono","Courier New",monospace;

  --shell:1240px;
  --gutter:clamp(16px,4vw,48px);
  --dur:180ms;
  --ease:cubic-bezier(.2,.6,.25,1);
}

*,*::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:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0 0 .6em;font-weight:800;letter-spacing:-.02em;line-height:1.15;color:var(--ink)}
h1{font-size:clamp(2rem,5vw,4.5rem)}
h2{font-size:clamp(1.6rem,3.4vw,2.6rem)}
h3{font-size:clamp(1.15rem,1.8vw,1.6rem)}
p{margin:0 0 1em}
a{color:var(--pitch);text-decoration-thickness:1px;text-underline-offset:3px}
img{max-width:100%;height:auto;display:block}
ul,ol{margin:0;padding:0}
button{font-family:inherit}
hr{border:0}
::selection{background:var(--signal);color:var(--ink)}

:focus-visible{outline:2px solid var(--signal);outline-offset:3px}

.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.serif{font-family:var(--font-serif)}
.lede{font-family:var(--font-serif);font-size:clamp(1rem,1.6vw,1.22rem);line-height:1.95;color:var(--pitch);max-width:38em}
.eyebrow{
  display:inline-flex;align-items:center;gap:.5em;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--ember);margin:0 0 .9em;
}
.section{padding-block:clamp(40px,6vw,80px)}
.rule{height:1px;background:rgba(17,24,21,.16);border:0;margin:0}

.skip-link{
  position:fixed;left:12px;top:-80px;z-index:200;
  background:var(--signal);color:var(--ink);
  padding:10px 18px;font-weight:700;font-size:14px;text-decoration:none;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:12px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--forest);
  color:var(--cold);
  box-shadow:0 1px 0 rgba(248,251,249,.08);
}
.header-rail{background:var(--forest-deep);border-bottom:1px solid rgba(248,251,249,.08)}
.rail-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:32px}
.rail-status{display:flex;align-items:center;gap:8px;margin:0;font-size:12px;color:var(--mist);letter-spacing:.03em}
.rail-meta{margin:0;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--sage)}
.status-dot{
  display:inline-block;flex:none;width:7px;height:7px;border-radius:50%;
  background:var(--signal);box-shadow:0 0 0 3px rgba(242,193,78,.18);
}
.bar-inner{
  display:flex;align-items:center;flex-wrap:wrap;
  gap:clamp(12px,2vw,28px);
  min-height:72px;padding-block:10px;position:relative;
}
.brand{display:flex;align-items:center;gap:12px;flex:none;text-decoration:none;color:var(--cold)}
.brand-mark{
  display:grid;place-items:center;flex:none;
  width:44px;height:44px;
  background:var(--ember);color:var(--cold);
  font-size:12.5px;font-weight:700;letter-spacing:.02em;
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-size:20px;font-weight:800;letter-spacing:-.02em}
.brand-tag{font-family:var(--font-serif);font-size:11.5px;color:var(--sage);letter-spacing:.04em}
.brand:hover .brand-mark{background:var(--ember-deep)}

.nav-toggle{
  display:none;align-items:center;gap:10px;margin-left:auto;
  padding:9px 14px;cursor:pointer;
  background:rgba(248,251,249,.06);
  border:1px solid rgba(248,251,249,.24);
  color:var(--cold);font-size:13px;font-weight:700;letter-spacing:.04em;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-toggle:hover{background:rgba(248,251,249,.12);border-color:rgba(248,251,249,.5)}
.nav-toggle-box{display:grid;gap:4px}
.nav-toggle-line{display:block;width:16px;height:2px;background:var(--signal)}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:first-child{transform:translateY(3px) rotate(20deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:last-child{transform:translateY(-3px) rotate(-20deg)}

.site-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px;list-style:none}
.nav-link{
  display:flex;align-items:baseline;gap:6px;
  padding:10px 12px;text-decoration:none;
  color:var(--mist);font-size:14.5px;font-weight:600;
  border-bottom:2px solid transparent;
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-num{font-size:10px;letter-spacing:.06em;color:var(--sage);transition:color var(--dur) var(--ease)}
.nav-link:hover{color:var(--cold);background:rgba(248,251,249,.08)}
.nav-link[aria-current="page"]{color:var(--cold);border-bottom-color:var(--ember)}
.nav-link[aria-current="page"] .nav-num{color:var(--signal)}
.nav-link:focus-visible{outline-offset:-2px}
.nav-foot{display:none}

.read-progress{height:3px;background:rgba(248,251,249,.12)}
.read-progress-bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--signal),var(--ember));
  transition:width 80ms linear;
}

/* ---------- footer ---------- */
.site-footer{
  position:relative;margin-top:clamp(48px,8vw,96px);
  padding-top:clamp(36px,5vw,64px);
  background:var(--forest);color:var(--cold);
  border-top:3px solid var(--pitch);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr .8fr .9fr 1.1fr;
  gap:clamp(24px,4vw,56px);
  padding-bottom:clamp(28px,4vw,48px);
}
.footer-logo{display:flex;align-items:center;gap:12px;margin:0 0 14px}
.footer-name{font-size:26px;font-weight:800;letter-spacing:-.02em}
.footer-line{margin:0 0 16px;max-width:34ch;font-size:14px;line-height:1.8;color:var(--mist)}
.footer-update{display:flex;align-items:center;gap:8px;margin:0;font-size:12.5px;color:var(--sage)}
.footer-title{
  margin:0 0 14px;font-family:var(--font-mono);
  font-size:11.5px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;
  color:var(--signal);
}
.footer-list{list-style:none;display:grid;gap:8px;font-size:14px}
.footer-list a{
  color:var(--mist);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-list a:hover{color:var(--cold);border-bottom-color:var(--ember)}
.footer-list--plain{color:var(--mist)}
.footer-list--plain li{display:flex;align-items:baseline;gap:10px;line-height:1.6}
.footer-list--plain .mono{flex:none;min-width:34px;font-size:11px;letter-spacing:.06em;color:var(--sage)}
.footer-cta{margin-top:18px}
.footer-base{border-top:1px solid rgba(248,251,249,.14)}
.footer-base-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px;padding-block:18px;font-size:12.5px;color:var(--sage);
}
.footer-copy{margin:0}
.footer-legal{display:flex;flex-wrap:wrap;gap:18px;list-style:none}
.footer-legal a{color:var(--mist);text-decoration:none}
.footer-legal a:hover{color:var(--cold)}
.footer-icp{margin:0;letter-spacing:.04em}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:12px 22px;border:1px solid transparent;
  font-size:14.5px;font-weight:700;line-height:1.2;letter-spacing:.02em;
  text-decoration:none;cursor:pointer;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn--solid{
  background:var(--ember);color:var(--cold);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
}
.btn--solid:hover{background:var(--ember-deep);transform:translateY(-1px)}
.btn--ghost{
  background:transparent;color:var(--cold);border-color:rgba(248,251,249,.4);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
}
.btn--ghost:hover{border-color:var(--cold);background:rgba(248,251,249,.1)}
.btn--quiet{background:transparent;color:var(--pitch);border-color:rgba(31,107,69,.42)}
.btn--quiet:hover{background:rgba(31,107,69,.08);border-color:var(--pitch)}
.btn:focus-visible{outline-offset:-2px}

/* ---------- panels / tags ---------- */
.panel{
  background:var(--cold);color:var(--ink);
  border:1px solid rgba(17,24,21,.1);
  padding:clamp(16px,2.4vw,28px);
}
.panel--dark{background:var(--forest);color:var(--cold);border-color:transparent}
.panel--pitch{background:var(--pitch);color:var(--cold);border-color:transparent}
.panel--dark a,.panel--pitch a{color:var(--cold)}
.cut{clip-path:polygon(0 0,100% 0,100% calc(100% - 18px),calc(100% - 18px) 100%,0 100%)}
.cut--left{clip-path:polygon(18px 0,100% 0,100% 100%,0 100%,0 18px)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;background:var(--mist);color:var(--ink);
  font-size:12px;font-weight:700;letter-spacing:.04em;
}
.tag--signal{background:var(--signal);color:var(--ink)}
.tag--ember{background:var(--ember);color:var(--cold)}
.tag--pitch{background:var(--pitch);color:var(--cold)}

/* ---------- breadcrumbs ---------- */
.breadcrumbs{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:var(--pitch)}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none}
.breadcrumbs li{display:flex;align-items:center;gap:8px}
.breadcrumbs li::after{content:"/";color:var(--sage)}
.breadcrumbs li:last-child::after{content:none}
.breadcrumbs a{color:var(--pitch);text-decoration:none;border-bottom:1px solid rgba(31,107,69,.32)}
.breadcrumbs a:hover{border-bottom-color:var(--pitch)}
.breadcrumbs [aria-current="page"]{color:var(--ink)}

/* ---------- grid ---------- */
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2.4vw,32px)}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-9{grid-column:span 9}
.col-12{grid-column:span 12}

/* ---------- media ---------- */
.media{
  position:relative;overflow:hidden;display:block;
  aspect-ratio:4/3;background:var(--forest);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 20px),calc(100% - 20px) 100%,0 100%);
}
.media--wide{aspect-ratio:16/9}
.media--tall{aspect-ratio:3/4}
.media img{width:100%;height:100%;object-fit:cover}
.media--board{background:linear-gradient(155deg,var(--pitch),var(--forest) 78%)}
.media--board::before{
  content:"";position:absolute;inset:9%;
  border:1px solid rgba(248,251,249,.3);border-radius:50%;
  pointer-events:none;
}
.media--board::after{
  content:"";position:absolute;left:9%;right:9%;top:50%;
  height:1px;background:rgba(248,251,249,.3);pointer-events:none;
}

/* ---------- reveal ---------- */
html.has-js .reveal{
  opacity:0;transform:translateY(10px);
  transition:opacity 220ms var(--ease),transform 220ms var(--ease);
}
html.has-js .reveal.is-in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1120px){
  .brand-tag{display:none}
  .nav-link{padding:10px 9px;font-size:14px}
}
@media (max-width:960px){
  .bar-inner{min-height:64px;padding-block:8px}
  .nav-toggle{display:inline-flex}
  .site-nav{
    display:none;order:3;flex-basis:100%;margin:4px 0 10px;
    padding-top:8px;border-top:1px solid rgba(248,251,249,.16);
  }
  .site-nav[data-open]{display:block;animation:navIn 180ms var(--ease) both}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-link{
    justify-content:flex-start;gap:10px;
    padding:12px 4px;font-size:15px;
    border-bottom:1px solid rgba(248,251,249,.1);
    border-left:2px solid transparent;
  }
  .nav-link[aria-current="page"]{
    border-bottom-color:rgba(248,251,249,.1);
    border-left-color:var(--ember);
    background:rgba(248,251,249,.07);
  }
  .nav-foot{display:block;margin:12px 4px 0;font-size:11px;letter-spacing:.08em;color:var(--sage)}
  .rail-meta{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:clamp(20px,4vw,36px)}
  .footer-brand{grid-column:1 / -1}
  .col-3,.col-4{grid-column:span 6}
  .col-5,.col-7,.col-8,.col-9{grid-column:span 12}
}
@media (max-width:620px){
  body{font-size:16px}
  .rail-status{font-size:11px}
  .brand-mark{width:38px;height:38px;font-size:11px}
  .brand-name{font-size:18px}
  .footer-grid{grid-template-columns:1fr}
  .footer-name{font-size:23px}
  .footer-base-inner{flex-direction:column;align-items:flex-start;gap:10px}
  .col-3,.col-4{grid-column:span 12}
}
@keyframes navIn{
  from{opacity:0;transform:translateY(-6px)}
  to{opacity:1;transform:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.has-js .reveal{opacity:1;transform:none}
  .read-progress-bar{transition:none}
}