/* ===========================================================
   博奥主站 · /assets/site.css
   共享外壳：令牌 / reset / 中文排版 / 头部 / 页脚 / 基础组件
   =========================================================== */

:root{
  --ink:#07120F;
  --ink-2:#0E1F1A;
  --ink-3:#162A23;
  --text:#F2F7F4;
  --muted:#A6BDB2;
  --muted-dim:#8AA79B;
  --cyan:#38F2C8;
  --amber:#FFA23A;
  --violet:#8B5CF6;
  --line:#1F6F5C;
  --mist:#0B3A2E;
  --line-soft:rgba(31,111,92,.45);
  --cyan-soft:rgba(56,242,200,.12);
  --amber-soft:rgba(255,162,58,.12);
  --violet-soft:rgba(139,92,246,.14);
  --shadow-1:0 18px 44px -30px rgba(0,0,0,.95);
  --shadow-2:0 30px 64px -34px rgba(0,0,0,1);
  --radius-pill:999px;
  --radius-md:10px;
  --gutter:clamp(18px,4vw,48px);
  --maxw:1240px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,"SF Mono","JetBrains Mono","Roboto Mono",Menlo,Consolas,monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:180ms;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:110px}
body{margin:0}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,picture,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit}
::selection{background:var(--cyan);color:var(--ink)}

/* ---------- base ---------- */
html{background:var(--ink)}
body{
  min-height:100vh;
  background:
    radial-gradient(1200px 620px at 84% -10%, rgba(11,58,46,.85), transparent 62%),
    radial-gradient(900px 520px at 2% 14%, rgba(31,111,92,.18), transparent 66%),
    var(--ink);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:clamp(15px,.35vw + 14px,17px);
  font-weight:400;
  line-height:1.85;
  letter-spacing:.012em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-weight:300;line-height:1.08;letter-spacing:-.015em;text-wrap:balance}
h1{font-size:clamp(2.3rem,5.6vw,4.4rem)}
h2{font-size:clamp(1.7rem,3.4vw,2.8rem)}
h3{font-size:clamp(1.15rem,1.9vw,1.55rem);font-weight:400;letter-spacing:0}
p{text-wrap:pretty}
strong,b{font-weight:600}
a{text-decoration-color:var(--line);text-underline-offset:3px}
small{font-size:.82em}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:3px}
a:focus-visible,button:focus-visible,summary:focus-visible,label:focus-visible{outline-offset:4px}

/* ---------- layout utilities ---------- */
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.container--narrow{max-width:820px}
.section{padding-block:clamp(52px,8vw,132px)}
.band{
  background:linear-gradient(120deg,var(--mist) 0%,var(--ink-2) 58%,var(--ink) 100%);
  border-block:2px solid var(--line);
}
.grid{display:grid;gap:clamp(20px,3vw,40px)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.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 > * + *{margin-top:clamp(14px,1.6vw,22px)}
.stack--lg > * + *{margin-top:clamp(24px,3vw,42px)}

/* ---------- typography components ---------- */
.display{
  font-size:clamp(3rem,9vw,8.5rem);
  font-weight:200;
  line-height:.92;
  letter-spacing:-.03em;
}
.display em{font-style:normal;color:var(--cyan)}
.lede{
  font-size:clamp(16px,1.5vw,20px);
  line-height:1.78;
  color:var(--muted);
  max-width:58ch;
}
.eyebrow{
  display:flex;align-items:center;gap:12px;
  font-size:12px;font-weight:500;
  letter-spacing:.22em;text-transform:uppercase;
  color:var(--muted);
}
.eyebrow::before{content:"";width:34px;height:1px;background:var(--line);flex:0 0 auto}
.section-index{
  font-family:var(--font-mono);
  font-size:12px;font-weight:700;
  letter-spacing:.2em;
  color:var(--cyan);
}
.hr-line{height:2px;border:0;margin:0;background:linear-gradient(90deg,var(--line),rgba(31,111,92,0))}
.prose{max-width:72ch;font-size:1.02rem;line-height:1.9}
.prose p + p{margin-top:1.1em}
.prose h2,.prose h3{margin-top:1.9em;margin-bottom:.6em}
.prose ul,.prose ol{list-style:none;margin:1.1em 0}
.prose li{position:relative;padding-left:22px}
.prose li + li{margin-top:.5em}
.prose li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;border:1px solid var(--cyan);transform:rotate(45deg)}
.prose a{color:var(--cyan);text-decoration:none;border-bottom:1px solid rgba(56,242,200,.4)}
.prose blockquote{margin:1.6em 0;padding:16px 22px;border-left:2px solid var(--amber);color:var(--muted)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 26px;
  border:2px solid var(--line);
  border-radius:var(--radius-pill);
  background:transparent;
  color:var(--text);
  font-size:14px;font-weight:600;letter-spacing:.05em;
  text-decoration:none;cursor:pointer;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.btn--primary{border-color:var(--cyan);background:var(--cyan);color:var(--ink)}
.btn--primary:hover{transform:translateY(-3px);box-shadow:0 16px 34px -20px var(--cyan)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-3px);box-shadow:var(--shadow-1)}

/* ---------- tags & signals ---------- */
.tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 11px;
  border:1px solid var(--line-soft);
  border-radius:4px;
  font-family:var(--font-mono);
  font-size:11px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);
}
.tag--cyan{color:var(--cyan);border-color:rgba(56,242,200,.45);background:var(--cyan-soft)}
.tag--amber{color:var(--amber);border-color:rgba(255,162,58,.45);background:var(--amber-soft)}
.tag--violet{color:#B79CFF;border-color:rgba(139,92,246,.5);background:var(--violet-soft)}
.signal{
  display:inline-block;width:8px;height:8px;border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 4px rgba(56,242,200,.14);
  animation:signal-breathe 2.4s ease-in-out infinite;
}
.signal--amber{background:var(--amber);box-shadow:0 0 0 4px rgba(255,162,58,.14)}
.signal--violet{background:var(--violet);box-shadow:0 0 0 4px rgba(139,92,246,.16)}
@keyframes signal-breathe{0%,100%{opacity:.45}50%{opacity:1}}

/* ---------- surfaces ---------- */
.surface{
  background:var(--ink-2);
  border:2px solid var(--line);
  border-radius:var(--radius-md);
  padding:clamp(20px,3vw,34px);
}
.surface--raised{
  background:linear-gradient(150deg,var(--ink-3),var(--ink-2) 70%);
  box-shadow:var(--shadow-1);
}

/* ---------- media frames ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  border:2px solid var(--line);
  border-radius:6px;
  aspect-ratio:16/10;
  background:linear-gradient(160deg,var(--mist) 0%,var(--ink-2) 58%,var(--ink) 100%);
}
.media-frame > img,.media-frame > picture,.media-frame > picture > img,.media-frame > video{
  width:100%;height:100%;object-fit:cover;
}
.media-frame > img{filter:saturate(.92) contrast(1.05)}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(7,18,15,0) 42%,rgba(7,18,15,.78) 100%);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--board{
  aspect-ratio:1/1;
  background-color:var(--ink-2);
  background-image:
    linear-gradient(rgba(56,242,200,.10) 1px,transparent 1px),
    linear-gradient(90deg,rgba(56,242,200,.10) 1px,transparent 1px);
  background-size:32px 32px,32px 32px;
}
.media-frame--slant{clip-path:polygon(0 0,100% 0,100% 92%,0 100%)}
.media-frame__caption{
  position:absolute;left:14px;bottom:13px;z-index:2;
  padding:4px 9px;
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--text);
  background:rgba(7,18,15,.74);
  border:1px solid var(--line-soft);
  border-radius:4px;
}

/* ---------- switch (radio + label) ---------- */
.switch-group{display:flex;flex-wrap:wrap;align-items:center;gap:8px;position:relative}
.switch-group input{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}
.switch-label{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;
  border:2px solid var(--line-soft);
  border-radius:var(--radius-pill);
  font-size:13px;font-weight:500;letter-spacing:.04em;
  color:var(--muted);
  cursor:pointer;user-select:none;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.switch-label:hover{color:var(--text);border-color:var(--line);transform:translateY(-3px)}
.switch-group input:checked + .switch-label{
  color:var(--cyan);border-color:var(--cyan);background:var(--cyan-soft);
}
.switch-group input:focus-visible + .switch-label{outline:2px solid var(--cyan);outline-offset:3px}

/* ---------- fold (details / summary) ---------- */
.fold{
  border:2px solid var(--line);
  border-radius:var(--radius-md);
  background:var(--ink-2);
  overflow:hidden;
}
.fold + .fold{margin-top:10px}
.fold summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 20px;
  font-weight:500;
  cursor:pointer;list-style:none;
}
.fold summary::-webkit-details-marker{display:none}
.fold summary::after{
  content:"";flex:0 0 auto;
  width:10px;height:10px;
  border-right:2px solid var(--cyan);border-bottom:2px solid var(--cyan);
  transform:rotate(45deg);
  transition:transform var(--dur) var(--ease);
}
.fold[open] summary::after{transform:rotate(-135deg)}
.fold[open] summary{border-bottom:1px solid var(--line-soft)}
.fold-body{padding:16px 20px 20px;font-size:14.5px;line-height:1.85;color:var(--muted)}

/* ---------- breadcrumb ---------- */
.breadcrumb{padding-block:clamp(14px,2vw,22px)}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.breadcrumb-item{display:flex;align-items:center;gap:10px;font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}
.breadcrumb-item + .breadcrumb-item::before{content:"/";color:var(--line)}
.breadcrumb-item a{text-decoration:none;color:var(--muted)}
.breadcrumb-item a:hover{color:var(--cyan)}
.breadcrumb-item [aria-current="page"]{color:var(--text)}

/* ---------- reveal (JS 开启，失败时内容始终可见) ---------- */
.has-reveal [data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.has-reveal [data-reveal].is-visible{opacity:1;transform:none}

/* ===========================================================
   头部
   =========================================================== */
.skip-link{
  position:fixed;top:10px;left:50%;z-index:200;
  transform:translate(-50%,-180%);
  padding:10px 22px;
  border-radius:var(--radius-pill);
  background:var(--cyan);color:var(--ink);
  font-size:13px;font-weight:700;text-decoration:none;
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translate(-50%,0)}

.site-header{
  position:sticky;top:0;z-index:80;
  padding:clamp(10px,1.5vw,18px) var(--gutter) clamp(10px,1.5vw,16px);
  background:linear-gradient(180deg,rgba(7,18,15,.97) 0%,rgba(7,18,15,.74) 64%,rgba(7,18,15,0) 100%);
  -webkit-backdrop-filter:blur(12px) saturate(1.05);
  backdrop-filter:blur(12px) saturate(1.05);
  transition:padding var(--dur) var(--ease);
}
.site-header[data-scrolled="true"]{padding-top:6px;padding-bottom:6px}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:0;height:2px;
  background:rgba(31,111,92,.35);
  overflow:hidden;
}
.scroll-progress-bar{
  display:block;width:100%;height:100%;
  transform:scaleX(0);transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan),var(--violet) 55%,var(--amber));
  transition:transform .12s linear;
}

.header-shell{
  position:relative;z-index:95;
  display:flex;align-items:center;gap:clamp(10px,1.6vw,22px);
  max-width:var(--maxw);margin-inline:auto;
  padding:8px 10px 8px 16px;
  border:2px solid var(--line);
  border-radius:var(--radius-pill);
  background:linear-gradient(120deg,rgba(22,42,35,.95),rgba(14,31,26,.9));
  box-shadow:var(--shadow-1);
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.site-header[data-scrolled="true"] .header-shell{
  border-color:rgba(56,242,200,.42);
  box-shadow:var(--shadow-2);
}

.brand{display:inline-flex;align-items:center;gap:11px;flex:0 0 auto;text-decoration:none;color:var(--text)}
.brand-mark{
  position:relative;display:grid;place-items:center;
  width:28px;height:28px;
  border:2px solid var(--cyan);border-radius:7px;
  background:linear-gradient(150deg,rgba(56,242,200,.26),rgba(56,242,200,0));
}
.brand-mark::after{
  content:"";width:8px;height:8px;border-radius:2px;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(56,242,200,.16);
}
.brand-text{display:flex;flex-direction:column;line-height:1.12}
.brand-name{font-size:16px;font-weight:600;letter-spacing:.06em;white-space:nowrap}
.brand-sub{
  font-family:var(--font-mono);
  font-size:9px;letter-spacing:.28em;text-transform:uppercase;
  color:var(--muted-dim);
  white-space:nowrap;
}

.site-nav{display:flex;align-items:center;margin-left:auto}
.nav-list{display:flex;align-items:center;gap:clamp(0px,.9vw,8px);counter-reset:navidx}
.nav-item{counter-increment:navidx}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 12px;
  border-radius:var(--radius-pill);
  font-size:13.5px;font-weight:500;letter-spacing:.02em;
  color:var(--muted);text-decoration:none;white-space:nowrap;
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.nav-link:hover{color:var(--text);background:rgba(56,242,200,.08);transform:translateY(-3px)}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;
  background:var(--cyan);
  transform:scaleX(0);transform-origin:left center;
  transition:transform var(--dur) var(--ease);
}
.nav-link[aria-current="page"]{color:var(--cyan)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

.header-cta{
  display:inline-flex;align-items:center;gap:9px;flex:0 0 auto;
  padding:9px 18px;
  border:2px solid var(--cyan);border-radius:var(--radius-pill);
  background:rgba(56,242,200,.07);
  color:var(--cyan);
  font-size:13px;font-weight:600;letter-spacing:.05em;
  text-decoration:none;white-space:nowrap;
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.header-cta:hover{background:var(--cyan);color:var(--ink);transform:translateY(-3px);box-shadow:0 16px 34px -20px var(--cyan)}
.header-cta-dot{
  width:7px;height:7px;border-radius:50%;
  background:currentColor;
  box-shadow:0 0 0 3px rgba(56,242,200,.2);
}
.header-cta:hover .header-cta-dot{box-shadow:0 0 0 3px rgba(7,18,15,.22)}

.nav-toggle{
  display:none;
  flex:0 0 auto;
  width:44px;height:44px;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
  padding:0;
  border:2px solid var(--line);border-radius:50%;
  background:transparent;color:var(--text);
  cursor:pointer;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-bar{display:block;width:18px;height:2px;background:currentColor;transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease)}
.site-header[data-open="true"] .nav-toggle{border-color:var(--cyan);color:var(--cyan)}
.site-header[data-open="true"] .nav-toggle-bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle-bar:nth-child(2){opacity:0}
.site-header[data-open="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.nav-scrim{
  display:none;
  position:fixed;inset:0;z-index:85;
  padding:0;margin:0;border:0;
  background:rgba(4,10,8,.7);
  -webkit-backdrop-filter:blur(3px);
  backdrop-filter:blur(3px);
  cursor:pointer;
}

html.nav-open,html.nav-open body{overflow:hidden}

/* ===========================================================
   页脚
   =========================================================== */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,120px);
  border-top:2px solid var(--line);
  background:linear-gradient(180deg,var(--ink) 0%,var(--ink-2) 46%,#08170F 100%);
  overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,rgba(56,242,200,0),var(--cyan) 22%,var(--violet) 52%,var(--amber) 78%,rgba(255,162,58,0));
  opacity:.8;
}
.footer-inner{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(40px,6vw,88px) var(--gutter) clamp(22px,3vw,34px);
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1.95fr);
  gap:clamp(28px,4vw,64px);
  align-items:start;
}
.footer-brand-block{display:flex;flex-direction:column;gap:14px;max-width:36ch}
.footer-brand{display:inline-flex;align-items:center;gap:11px;text-decoration:none;color:var(--text)}
.footer-tagline{font-size:14px;line-height:1.85;color:var(--muted)}
.footer-wordmark{
  margin-top:6px;
  font-family:var(--font-mono);
  font-size:clamp(40px,7vw,88px);
  font-weight:700;line-height:.86;letter-spacing:-.02em;
  color:rgba(56,242,200,.07);
  -webkit-text-stroke:1px rgba(56,242,200,.34);
}
.footer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(20px,3vw,42px)}
.footer-col{display:flex;flex-direction:column;gap:13px}
.footer-col-title{
  margin:0;padding-bottom:10px;
  border-bottom:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:11px;font-weight:600;letter-spacing:.22em;text-transform:uppercase;
  color:var(--cyan);
}
.footer-list{display:flex;flex-direction:column;gap:9px}
.footer-link{
  display:inline-flex;align-items:center;gap:9px;
  font-size:14px;color:var(--muted);text-decoration:none;
  transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.footer-link::before{
  content:"";flex:0 0 auto;
  width:6px;height:6px;
  border:1px solid var(--line);
  transform:rotate(45deg);
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-link:hover{color:var(--text);transform:translateX(3px)}
.footer-link:hover::before{background:var(--cyan);border-color:var(--cyan)}
.footer-contact{display:flex;flex-direction:column;gap:10px;font-size:13.5px;color:var(--muted)}
.footer-contact-item{display:flex;flex-direction:column;gap:1px;line-height:1.6}
.footer-contact-label{
  font-family:var(--font-mono);
  font-size:10px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--muted-dim);
}
.footer-note{
  margin-top:4px;
  padding-left:12px;
  border-left:2px solid var(--amber);
  font-size:12.5px;line-height:1.8;
  color:var(--muted-dim);
}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px 32px;
  margin-top:clamp(28px,4vw,56px);
  padding-top:18px;
  border-top:1px solid rgba(31,111,92,.55);
}
.footer-legal{font-size:12px;letter-spacing:.03em;color:var(--muted-dim)}
.footer-closing{font-size:13px;letter-spacing:.04em;color:var(--text)}
.footer-closing::before{
  content:"";display:inline-block;
  width:22px;height:2px;margin-right:10px;
  background:var(--cyan);vertical-align:middle;
}

/* ===========================================================
   响应式
   =========================================================== */
@media (max-width:1200px){
  .nav-link{padding:9px 9px;font-size:13px}
}
@media (max-width:1040px){
  .nav-toggle{display:inline-flex}
  .header-cta{margin-left:auto}
  .site-nav{
    position:fixed;top:0;right:0;bottom:0;
    width:min(420px,88vw);
    height:100dvh;
    margin:0;
    display:flex;flex-direction:column;align-items:stretch;
    padding:clamp(86px,14vh,120px) 26px 32px;
    border-left:2px solid var(--line);
    background:linear-gradient(185deg,var(--ink-3) 0%,var(--ink-2) 44%,var(--ink) 100%);
    box-shadow:-30px 0 60px -40px #000;
    transform:translateX(102%);
    visibility:hidden;
    overflow-y:auto;
    z-index:90;
    transition:transform 220ms var(--ease),visibility 220ms var(--ease);
  }
  .site-header[data-open="true"] .site-nav{transform:none;visibility:visible}
  .site-header[data-open="true"] .nav-scrim{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{
    padding:14px 10px;
    border-radius:10px;
    border-bottom:1px solid rgba(31,111,92,.42);
    font-size:clamp(17px,4.6vw,21px);
    font-weight:400;
    color:var(--text);
  }
  .nav-link::before{
    content:counter(navidx,decimal-leading-zero);
    font-family:var(--font-mono);
    font-size:11px;letter-spacing:.12em;
    color:var(--line);
  }
  .nav-link::after{display:none}
  .nav-link:hover{background:rgba(56,242,200,.08);transform:translateY(-2px)}
  .nav-link[aria-current="page"]{color:var(--cyan)}
  .nav-link[aria-current="page"]::before{color:var(--cyan)}
  .footer-top{grid-template-columns:minmax(0,1fr)}
  .footer-brand-block{max-width:none}
}
@media (max-width:900px){
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  [class*="col-"]{grid-column:span 6}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:620px){
  .grid--12,.grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  [class*="col-"]{grid-column:1 / -1}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .brand-sub{display:none}
  .header-cta{padding:8px 13px;font-size:12px;gap:7px}
  .header-shell{padding:7px 8px 7px 13px;gap:8px}
  .footer-wordmark{font-size:clamp(34px,13vw,56px)}
}
@media (max-width:380px){
  .header-cta-dot{display:none}
  .header-cta{padding:8px 11px}
}

/* ---------- motion preferences ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .signal{animation:none;opacity:1}
  .has-reveal [data-reveal]{opacity:1;transform:none}
  .nav-link:hover,.header-cta:hover,.btn:hover,.footer-link:hover,.switch-label:hover{transform:none}
}