*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
[hidden]{display:none!important}

:root{
  --snow:#F7F8FA;
  --white:#FFFFFF;
  --ink-blue:#2B3A4A;
  --ink:#101820;
  --maple:#D80621;
  --maple-deep:#B00519;
  --teal:#3FA796;
  --deep-teal:#0E7C6B;
  --line:#D9DEE5;
  --mid:#6B7C93;
  --alert:#F3D7DA;
  --shell:1240px;
  --gutter:clamp(16px,4vw,48px);
  --header-h:74px;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --ease:cubic-bezier(.2,.6,.2,1);
  --dur:200ms;
}

body{
  background:var(--snow);
  color:var(--ink-blue);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.7;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

:focus-visible{outline:2px solid var(--maple);outline-offset:3px}
.site-footer :focus-visible{outline-color:var(--teal)}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}

.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:8px;left:8px;z-index:200;
  padding:10px 16px;
  background:var(--ink);color:var(--white);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;
  border-left:3px solid var(--maple);
  transform:translateY(-160%);
  transition:transform 180ms var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,248,250,.95);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.progress-rail{
  position:absolute;top:0;left:0;right:0;height:2px;
  background:rgba(43,58,74,.08);
  overflow:hidden;
}
.progress-rail__bar{
  display:block;width:100%;height:100%;
  background:var(--maple);
  transform:scaleX(0);transform-origin:0 50%;
}
.header-inner{
  display:flex;align-items:center;
  gap:clamp(12px,2vw,28px);
  min-height:var(--header-h);
}
.brand-cluster{display:flex;align-items:center;gap:12px;margin-right:auto;min-width:0}
.brand{display:inline-flex;align-items:center;gap:11px;min-width:0}
.brand__mark{
  position:relative;flex:none;width:24px;height:24px;
  background:var(--white);border:1px solid var(--ink-blue);
}
.brand__mark::before{
  content:"";position:absolute;top:4px;right:4px;width:9px;height:9px;background:var(--maple);
}
.brand__text{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.brand__name{
  font-size:15px;font-weight:900;letter-spacing:-.01em;color:var(--ink);
  white-space:nowrap;
}
.brand__meta{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--mid);margin-top:3px;
}
.brand-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 8px;
  background:var(--white);border:1px solid var(--line);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--mid);white-space:nowrap;
}
.brand-badge__dot{width:6px;height:6px;background:var(--deep-teal);flex:none}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  flex:none;
  align-items:center;justify-content:center;flex-direction:column;
  background:var(--white);border:1px solid var(--line);
}
.nav-toggle__bar{
  display:block;width:18px;height:2px;margin:2.5px auto;
  background:var(--ink-blue);
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.site-header[data-open] .nav-toggle{border-color:var(--maple)}
.site-header[data-open] .nav-toggle .nav-toggle__bar:nth-child(1){transform:translateY(7px) rotate(45deg);background:var(--maple)}
.site-header[data-open] .nav-toggle .nav-toggle__bar:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle .nav-toggle__bar:nth-child(3){transform:translateY(-7px) rotate(-45deg);background:var(--maple)}

.site-nav{display:flex;align-items:center}
.nav-list{display:flex;align-items:center;gap:clamp(6px,1.2vw,22px)}
.nav-item{flex:none}
.nav-link{
  position:relative;display:inline-block;
  padding:9px 2px;
  font-size:clamp(13px,1.05vw,14.5px);font-weight:500;line-height:1.4;
  color:var(--ink-blue);white-space:nowrap;
  transition:color var(--dur) var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--maple);
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform 180ms var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--ink)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--ink);font-weight:700}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;margin-left:clamp(10px,1.6vw,22px)}
.nav-cta{display:none}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:12px 20px;
  font-family:var(--font-sans);font-size:14px;font-weight:600;line-height:1.3;
  border:1px solid transparent;border-radius:0;
  text-align:center;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn--signal{background:var(--maple);color:var(--white)}
.btn--signal:hover{background:var(--maple-deep);transform:translateY(-1px)}
.btn--ghost{background:transparent;border-color:var(--ink-blue);color:var(--ink-blue)}
.btn--ghost:hover{background:var(--ink-blue);color:var(--white);transform:translateY(-1px)}
.btn--quiet{background:var(--white);border-color:var(--line);color:var(--ink-blue)}
.btn--quiet:hover{border-color:var(--maple);color:var(--maple);transform:translateY(-1px)}
.btn--sm{padding:9px 14px;font-size:13px}

/* ---------- tags / labels ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 9px;
  background:var(--white);border:1px solid var(--line);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--mid);line-height:1.5;
}
.tag--teal{border-color:rgba(63,167,150,.55);background:rgba(63,167,150,.09);color:var(--deep-teal)}
.tag--alert{border-color:rgba(216,6,33,.35);background:var(--alert);color:#8B0517}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--mid);
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--maple)}
.meta-line{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--mid);
}

/* ---------- typography ---------- */
.display{
  font-size:clamp(2rem,6.2vw,4.4rem);
  font-weight:900;line-height:1.04;letter-spacing:-.02em;
  color:var(--ink);
}
.h2{
  font-size:clamp(1.4rem,2.6vw,2.1rem);
  font-weight:800;line-height:1.22;letter-spacing:-.01em;
  color:var(--ink-blue);
}
.h3{
  font-size:clamp(1.05rem,1.6vw,1.3rem);
  font-weight:700;line-height:1.35;
  color:var(--ink-blue);
}
.lead{font-size:clamp(1rem,1.5vw,1.15rem);line-height:1.75;color:var(--ink-blue)}

.prose{max-width:68ch;font-size:1.0625rem;line-height:1.8;color:var(--ink-blue)}
.prose p+p{margin-top:1em}
.prose h2{margin-top:1.6em;margin-bottom:.6em;font-size:clamp(1.3rem,2.2vw,1.7rem);font-weight:800;color:var(--ink)}
.prose h3{margin-top:1.4em;margin-bottom:.5em;font-size:1.1rem;font-weight:700;color:var(--ink-blue)}
.prose ul,.prose ol{margin:1em 0;padding-left:1.2em;list-style:disc}
.prose ol{list-style:decimal}
.prose li+li{margin-top:.4em}
.prose strong{font-weight:700;color:var(--ink)}
.prose a{color:var(--maple);border-bottom:1px solid rgba(216,6,33,.35)}

/* ---------- layout utilities ---------- */
.section{padding-block:clamp(40px,6vw,80px)}
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2.2vw,28px)}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}
.stack{display:flex;flex-direction:column;gap:16px}
.cluster{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.divider{height:1px;background:var(--line);border:0}

.panel{
  background:var(--white);
  border:1px solid var(--line);
  padding:clamp(18px,2.4vw,28px);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.panel:hover{transform:translateY(-2px);border-color:#C3CBD6}
.panel--ink{background:var(--ink-blue);border-color:var(--ink-blue);color:#E8EDF3}
.panel--ink .h3{color:var(--white)}

/* ---------- breadcrumb ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--mid);
}
.breadcrumb a{transition:color var(--dur) var(--ease)}
.breadcrumb a:hover{color:var(--maple)}
.breadcrumb__sep{color:#B9C2CD}

/* ---------- media ---------- */
.media{
  position:relative;overflow:hidden;
  aspect-ratio:16/9;
  background:var(--white);
  border:1px solid var(--line);
}
.media img{width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:21/9}
.media--square{aspect-ratio:1/1}
.media--tall{aspect-ratio:4/5}
.media--placeholder{
  background-image:
    linear-gradient(to right,rgba(43,58,74,.09) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(43,58,74,.09) 1px,transparent 1px);
  background-size:32px 32px;
}
.media--placeholder::before{
  content:"";position:absolute;top:0;left:0;width:56px;height:6px;background:var(--maple);
}
.media__caption{
  margin-top:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--mid);
}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,112px);
  background:var(--ink);
  color:#E6EAF0;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;height:3px;width:100%;
  background:linear-gradient(90deg,var(--maple) 0 96px,var(--teal) 96px 136px,rgba(255,255,255,.14) 136px 100%);
}
.footer-top{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px 32px;
  padding:clamp(40px,5vw,64px) 0 26px;
  border-bottom:1px solid rgba(255,255,255,.13);
}
.footer-brand{display:flex;align-items:flex-start;gap:13px;min-width:0}
.footer-brand__mark{
  position:relative;flex:none;width:26px;height:26px;
  border:1px solid rgba(255,255,255,.45);
}
.footer-brand__mark::before{
  content:"";position:absolute;top:4px;right:4px;width:10px;height:10px;background:var(--maple);
}
.footer-brand__text{min-width:0}
.footer-brand__name{font-size:17px;font-weight:900;letter-spacing:-.01em;color:var(--white)}
.footer-brand__note{margin-top:4px;font-size:13.5px;line-height:1.6;color:#95A3B5}
.footer-top__note{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:#7E8DA0;white-space:nowrap;
}

.footer-matrix{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1px;
  background:rgba(255,255,255,.13);
  border-bottom:1px solid rgba(255,255,255,.13);
}
.footer-entry{background:var(--ink);padding:26px 24px 28px 0}
.footer-entry+.footer-entry{padding-left:24px}
.footer-entry__head{display:flex;align-items:center;gap:11px;margin-bottom:9px}
.footer-entry__link{
  font-size:15px;font-weight:700;color:#F2F5F9;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-entry__link:hover,.footer-entry__link:focus-visible{color:var(--white);border-bottom-color:var(--maple)}
.footer-entry__text{font-size:13.5px;line-height:1.65;color:#93A2B5;max-width:32ch}

.ico{
  position:relative;flex:none;width:22px;height:22px;
  border:1px solid rgba(255,255,255,.32);
}
.ico--doc::after{
  content:"";position:absolute;left:4px;right:4px;top:5px;height:1px;
  background:var(--teal);
  box-shadow:0 4px 0 var(--teal),0 8px 0 rgba(255,255,255,.4);
}
.ico--grid::after{
  content:"";position:absolute;left:4px;top:4px;width:6px;height:6px;
  background:var(--teal);
  box-shadow:8px 0 0 rgba(255,255,255,.4),0 8px 0 rgba(255,255,255,.4),8px 8px 0 var(--teal);
}
.ico--screen::after{
  content:"";position:absolute;left:4px;top:4px;right:4px;height:9px;
  border:1px solid var(--maple);
}
.ico--screen::before{
  content:"";position:absolute;left:9px;bottom:4px;width:4px;height:1px;
  background:rgba(255,255,255,.45);
  box-shadow:-4px 3px 0 rgba(255,255,255,.45);
}

.footer-base{
  display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);
  gap:28px 40px;
  padding:32px 0 26px;
  border-bottom:1px solid rgba(255,255,255,.13);
}
.footer-contact{display:flex;flex-direction:column;gap:10px}
.footer-contact__row{display:flex;gap:14px;font-size:13.5px;line-height:1.7}
.footer-contact__label{
  flex:none;min-width:62px;padding-top:2px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.13em;text-transform:uppercase;
  color:#7E8DA0;
}
.footer-contact__value{color:#DCE3EC;min-width:0}
.footer-legal__title{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:#7E8DA0;margin-bottom:12px;
}
.footer-legal__links{display:flex;flex-wrap:wrap;gap:10px 22px}
.footer-legal__link{
  font-size:13.5px;color:#C9D3DF;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-legal__link:hover,.footer-legal__link:focus-visible{color:var(--white);border-bottom-color:var(--maple)}

.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 26px;
  padding:20px 0 30px;
}
.footer-bottom__meta{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:#7E8DA0;
}

/* ---------- to top ---------- */
.to-top{
  position:fixed;z-index:90;
  right:clamp(12px,3vw,28px);bottom:clamp(12px,3vw,28px);
  width:46px;height:46px;
  display:grid;place-items:center;
  background:var(--white);border:1px solid var(--line);
  color:var(--ink-blue);
  box-shadow:0 8px 22px rgba(16,24,32,.1);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.to-top:hover{transform:translateY(-2px);border-color:var(--maple);color:var(--maple)}
.to-top__icon{font-family:var(--font-mono);font-size:15px;line-height:1}

/* ---------- reveal ---------- */
html.js [data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity 420ms var(--ease),transform 420ms var(--ease);
}
html.js [data-reveal].is-inview{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .nav-toggle{display:flex;margin-left:auto}
  .header-actions{display:none}
  .site-nav{
    display:none;
    position:absolute;left:0;right:0;top:100%;
    background:var(--snow);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    padding:6px var(--gutter) 24px;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
  }
  .site-header[data-open] .site-nav{display:block}
  .site-header[data-open]{border-bottom-color:var(--line);box-shadow:0 14px 30px rgba(16,24,32,.08)}
  .site-nav .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item{width:100%}
  .nav-link{
    display:block;width:100%;
    padding:15px 0;
    font-size:16px;
    border-bottom:1px solid var(--line);
  }
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{color:var(--maple)}
  .nav-cta{display:inline-flex;width:100%;margin-top:20px}
}

@media (max-width:900px){
  .col-4,.col-5{grid-column:span 6}
  .col-6,.col-7,.col-8{grid-column:span 12}
  .footer-matrix{grid-template-columns:minmax(0,1fr)}
  .footer-entry{padding:22px 0}
  .footer-entry+.footer-entry{padding-left:0;border-top:1px solid rgba(255,255,255,.13)}
  .footer-entry__text{max-width:44ch}
  .footer-base{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:640px){
  :root{--header-h:66px}
  .col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 12}
  .brand__name{font-size:14px}
  .brand__meta{font-size:9.5px;letter-spacing:.1em}
  .brand-badge{display:none}
  .footer-top__note{display:none}
  .footer-contact__row{flex-direction:column;gap:2px}
  .footer-contact__label{min-width:0}
  .display{font-size:clamp(1.9rem,8vw,2.6rem)}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  html.js [data-reveal]{opacity:1;transform:none}
  .panel:hover,.btn:hover,.to-top:hover{transform:none}
}