/* ============ reset ============ */
*,*::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}
a{color:inherit;text-decoration:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
address{font-style:normal}
table{border-collapse:collapse;width:100%}

/* ============ tokens ============ */
:root{
  --ink-900:#05070E;
  --ink-800:#0A101C;
  --ink-700:#101A2B;
  --line:#1B2739;
  --line-soft:rgba(27,39,57,.62);
  --line-bright:rgba(43,227,198,.42);
  --muted:#6B7C93;
  --muted-deep:#4A5A70;
  --text:#E8EFF9;
  --text-soft:#C4D0E0;
  --cyan:#2BE3C6;
  --cyan-bright:#3FF2D6;
  --cyan-deep:#0F4B45;
  --orange:#FF7C36;
  --orange-deep:#3A1C0E;

  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --shell:1240px;
  --gutter:clamp(18px,4vw,56px);
  --gap:16px;
  --radius-s:6px;
  --radius-m:12px;
  --radius-l:20px;
  --radius-pill:999px;
  --h-header:80px;
  --h-header-scrolled:60px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ============ base ============ */
html{
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--h-header) + 24px);
}
body{
  min-height:100vh;
  background-color:var(--ink-900);
  background-image:
    linear-gradient(to right,rgba(232,239,249,.026) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(232,239,249,.026) 1px,transparent 1px);
  background-size:64px 64px;
  background-attachment:fixed;
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
h1,h2,h3,h4{font-weight:700;line-height:1.16;letter-spacing:-.02em;color:var(--text)}
h1{font-size:clamp(34px,6vw,64px)}
h2{font-size:clamp(26px,4vw,44px)}
h3{font-size:clamp(20px,2.4vw,28px)}
::selection{background:rgba(43,227,198,.28);color:#FFFFFF}
#main-content{display:block;min-height:40vh}

:where(a,button,summary,input,select,textarea,[tabindex]):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:4px;
}

/* ============ shell / grid ============ */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2vw,28px);
}
.grid-12 > *{grid-column:span var(--col,12)}
.stack{display:flex;flex-direction:column;gap:var(--gap,16px)}

/* ============ skip link ============ */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:300;
  padding:10px 18px;
  border-radius:var(--radius-pill);
  background:var(--cyan);
  color:#04120F;
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  transform:translateY(-180%);
  transition:transform .18s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0);outline-offset:4px}

/* ============ header ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(5,7,14,.74);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line-soft);
  transition:background-color .22s var(--ease),border-color .22s var(--ease);
}
.site-header[data-scrolled="true"]{
  background:rgba(5,7,14,.95);
  border-bottom-color:var(--line);
}
.site-header__progress{
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  background:rgba(43,227,198,.1);
  overflow:hidden;
}
.site-header__progress-bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transition:width .12s linear;
}
.site-header__inner{
  display:flex;
  align-items:center;
  gap:clamp(10px,2vw,26px);
  min-height:var(--h-header);
  padding-block:8px;
  transition:min-height .22s var(--ease);
}
.site-header[data-scrolled="true"] .site-header__inner{min-height:var(--h-header-scrolled)}

/* brand */
.brand{flex:0 0 auto;display:flex;align-items:center}
.brand__link{display:flex;align-items:center;gap:10px}
.brand__glyph{
  position:relative;
  width:26px;
  height:26px;
  border-radius:8px;
  border:1px solid var(--line-bright);
  background:linear-gradient(140deg,rgba(43,227,198,.22),rgba(43,227,198,0) 62%);
  display:grid;
  place-items:center;
  flex:0 0 auto;
}
.brand__glyph::after{
  content:"";
  width:8px;
  height:8px;
  border-radius:2px;
  background:var(--cyan);
  box-shadow:0 0 10px rgba(43,227,198,.85);
}
.brand__text{display:flex;align-items:center;gap:9px}
.brand__name{
  font-size:20px;
  font-weight:700;
  letter-spacing:.05em;
  color:var(--text);
  white-space:nowrap;
}
.brand__sub{
  writing-mode:vertical-rl;
  font-size:9px;
  line-height:1;
  letter-spacing:.02em;
  color:var(--muted);
  padding-left:9px;
  border-left:1px solid var(--line);
  white-space:nowrap;
  height:62px;
  overflow:hidden;
  transition:opacity .18s var(--ease);
}
.site-header[data-scrolled="true"] .brand__sub{opacity:0}

/* nav capsule */
.nav{flex:1 1 auto;display:flex;justify-content:center;min-width:0}
.nav__list{
  display:flex;
  align-items:center;
  gap:2px;
  padding:5px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line);
  background:rgba(10,16,28,.84);
  box-shadow:inset 0 1px 0 rgba(232,239,249,.045),0 12px 34px -22px #000;
}
.nav__item{display:block}
.nav__link{
  display:block;
  padding:7px 14px;
  border-radius:var(--radius-pill);
  font-size:14px;
  line-height:1.5;
  color:var(--muted);
  white-space:nowrap;
  transition:color .16s var(--ease),background-color .16s var(--ease),transform .16s var(--ease);
}
.nav__link:hover{color:var(--text);background:rgba(232,239,249,.06);transform:translateY(-1px)}
.nav__link[aria-current="page"]{
  color:#04120F;
  font-weight:700;
  background:linear-gradient(135deg,var(--cyan),#1FC4AC);
}

/* header tools */
.header-tools{flex:0 0 auto;display:flex;align-items:center;gap:9px}
.version-chip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:6px 12px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(43,227,198,.32);
  background:rgba(15,75,69,.5);
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.4;
  color:var(--cyan);
  white-space:nowrap;
  transition:border-color .16s var(--ease),background-color .16s var(--ease),transform .16s var(--ease);
}
.version-chip:hover{border-color:var(--cyan);background:rgba(15,75,69,.82);transform:translateY(-1px)}
.version-chip__dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 8px var(--cyan);
  flex:0 0 auto;
}
.version-chip__label{color:rgba(43,227,198,.7);letter-spacing:.08em}
.version-chip__num{font-weight:700;letter-spacing:.06em}

.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:7px 13px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line);
  background:rgba(16,26,43,.92);
  font-size:13px;
  line-height:1.5;
  color:var(--text);
  transition:border-color .16s var(--ease),background-color .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--line-bright)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:3px;width:14px;flex:0 0 auto}
.nav-toggle__bars span{
  display:block;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .18s var(--ease),opacity .18s var(--ease);
}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(2.5px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(2){transform:translateY(-2.5px) rotate(-45deg)}
.nav-toggle__current{display:none;max-width:6em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ footer ============ */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,132px);
  background:var(--ink-800);
  border-top:1px solid var(--line);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  background:linear-gradient(90deg,transparent,rgba(43,227,198,.7) 18%,rgba(255,124,54,.45) 78%,transparent);
  pointer-events:none;
}
.site-footer__top{
  display:grid;
  grid-template-columns:1.35fr 1fr 1.2fr;
  gap:clamp(24px,4vw,64px);
  padding-block:clamp(38px,6vw,76px);
}
.site-footer__brand{min-width:0}
.footer-mark{
  display:inline-block;
  font-size:26px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--text);
  transition:color .16s var(--ease);
}
.footer-mark:hover{color:var(--cyan)}
.footer-tagline{
  margin-top:14px;
  max-width:21em;
  font-size:15px;
  line-height:1.85;
  color:#B4C2D4;
}
.footer-meta{
  margin-top:18px;
  font-size:11px;
  letter-spacing:.16em;
  color:var(--muted-deep);
  text-transform:uppercase;
}
.site-footer__col{min-width:0}
.footer-title{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:18px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.18em;
  color:var(--text);
}
.footer-title__idx{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:400;
  letter-spacing:.06em;
  color:var(--cyan);
  border:1px solid rgba(43,227,198,.3);
  border-radius:4px;
  padding:1px 5px;
  line-height:1.5;
}
.footer-list{display:flex;flex-direction:column;gap:11px;font-size:14px}
.footer-list a{
  color:#A9B7CA;
  transition:color .16s var(--ease),padding-left .16s var(--ease);
}
.footer-list a:hover{color:var(--cyan);padding-left:6px}
.footer-list--contact{gap:12px}
.footer-list--contact li{
  display:flex;
  align-items:baseline;
  gap:10px;
  font-size:13px;
  line-height:1.7;
  color:#A9B7CA;
}
.footer-label{
  flex:0 0 34px;
  font-size:11px;
  letter-spacing:.14em;
  color:var(--muted);
  text-transform:uppercase;
}
.copy-mail{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding-bottom:1px;
  border-bottom:1px dashed rgba(43,227,198,.35);
  font-family:var(--font-mono);
  font-size:13px;
  color:#D7E1EE;
  overflow-wrap:anywhere;
  text-align:left;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.copy-mail:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.copy-mail::after{
  content:"已复制";
  position:absolute;
  left:0;
  bottom:calc(100% + 8px);
  padding:3px 8px;
  border-radius:var(--radius-s);
  background:var(--cyan);
  color:#04120F;
  font-family:var(--font-sans);
  font-size:11px;
  font-weight:700;
  letter-spacing:.06em;
  white-space:nowrap;
  opacity:0;
  transform:translateY(4px);
  transition:opacity .16s var(--ease),transform .16s var(--ease);
  pointer-events:none;
}
.copy-mail[data-copied="true"]{color:var(--cyan);border-bottom-color:var(--cyan);border-bottom-style:solid}
.copy-mail[data-copied="true"]::after{opacity:1;transform:translateY(0)}
.footer-note{
  margin-top:16px;
  max-width:24em;
  font-size:12px;
  line-height:1.8;
  color:var(--muted-deep);
}
.site-footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding-block:20px 26px;
  border-top:1px solid var(--line);
  font-size:12px;
  color:var(--muted);
}
.footer-legal{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.footer-legal a{color:#9FB0C4;transition:color .16s var(--ease)}
.footer-legal a:hover{color:var(--cyan)}
.footer-legal__dot{width:3px;height:3px;border-radius:50%;background:var(--line);flex:0 0 auto}
.footer-region{color:var(--muted-deep);letter-spacing:.16em}
.footer-copy{color:var(--muted-deep);letter-spacing:.04em}
.site-footer__axis{
  position:absolute;
  right:clamp(6px,1.6vw,24px);
  top:50%;
  transform:translateY(-50%);
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.42em;
  color:rgba(107,124,147,.3);
  pointer-events:none;
  user-select:none;
  display:none;
}

/* ============ shared atoms ============ */
.rule{height:1px;width:100%;border:0;background:var(--line)}
.rule--glow{background:linear-gradient(90deg,var(--cyan),rgba(43,227,198,0) 58%)}
.panel{
  background:rgba(10,16,28,.74);
  border:1px solid var(--line);
  border-radius:var(--radius-m);
}
.cut-corner{clip-path:polygon(0 0,100% 0,100% calc(100% - 18px),calc(100% - 18px) 100%,0 100%)}
.grid-field{position:relative}
.grid-field::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(43,227,198,.07) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(43,227,198,.07) 1px,transparent 1px);
  background-size:8px 8px;
  opacity:.9;
  z-index:0;
}

.data-mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--cyan);flex:0 0 auto}

.side-note{
  writing-mode:vertical-rl;
  font-size:12px;
  letter-spacing:.3em;
  color:var(--muted);
  padding-left:10px;
  border-left:1px solid var(--line);
  white-space:nowrap;
}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  padding-bottom:18px;
  border-bottom:1px solid var(--line);
  margin-bottom:clamp(24px,4vw,44px);
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.5;
  transition:transform .16s var(--ease),background-color .16s var(--ease),border-color .16s var(--ease),color .16s var(--ease);
}
.btn--primary{background:var(--cyan);color:#04120F}
.btn--primary:hover{background:var(--cyan-bright);transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--text);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px)}
.btn--warn{background:rgba(255,124,54,.14);color:var(--orange);border-color:rgba(255,124,54,.4)}
.btn--warn:hover{background:rgba(255,124,54,.24);border-color:var(--orange);transform:translateY(-2px)}

.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line);
  background:rgba(16,26,43,.72);
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.6;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--muted);
  white-space:nowrap;
}
.chip--cyan{color:var(--cyan);border-color:rgba(43,227,198,.35);background:rgba(15,75,69,.48)}
.chip--orange{color:var(--orange);border-color:rgba(255,124,54,.4);background:rgba(58,28,14,.62)}

.card{
  position:relative;
  padding:clamp(16px,2vw,24px);
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  background:var(--ink-700);
  transition:transform .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:var(--line-bright);background:#122036}

.stat{display:flex;flex-direction:column;gap:5px}
.stat__value{
  font-family:var(--font-mono);
  font-size:clamp(26px,4vw,40px);
  font-weight:700;
  line-height:1.05;
  letter-spacing:-.02em;
  color:var(--cyan);
  font-variant-numeric:tabular-nums;
}
.stat__label{
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--muted);
}
.breadcrumb a{color:var(--muted);transition:color .16s var(--ease)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb__sep{color:var(--line);user-select:none}
.breadcrumb [aria-current="page"]{color:var(--text)}

.prose{max-width:38em}
.prose > * + *{margin-top:1.1em}
.prose p{color:var(--text-soft);line-height:1.85}
.prose h2{font-size:clamp(24px,3vw,32px);margin-top:2em}
.prose h3{font-size:20px;margin-top:1.6em}
.prose strong{color:var(--text)}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(43,227,198,.35)}
.prose a:hover{border-bottom-color:var(--cyan)}
.prose ul{display:flex;flex-direction:column;gap:10px}
.prose ul li{position:relative;padding-left:20px;color:var(--text-soft)}
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:7px;
  height:1px;
  background:var(--cyan);
}

.img-frame{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  background:
    radial-gradient(120% 90% at 10% 0%,rgba(43,227,198,.18),transparent 56%),
    radial-gradient(110% 80% at 100% 100%,rgba(255,124,54,.14),transparent 62%),
    var(--ink-700);
}
.img-frame > img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.62) contrast(1.06) brightness(.92);
}
.img-frame::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background:
    linear-gradient(to right,rgba(5,7,14,.55),transparent 46%),
    repeating-linear-gradient(to bottom,rgba(5,7,14,.2) 0 1px,transparent 1px 4px);
  opacity:.42;
}
.img-frame--wide{aspect-ratio:21 / 9}
.img-frame--tall{aspect-ratio:3 / 4}
.img-frame--square{aspect-ratio:1 / 1}
.img-frame__tag{
  position:absolute;
  top:10px;
  left:10px;
  z-index:2;
  padding:3px 9px;
  border-radius:var(--radius-s);
  border:1px solid rgba(43,227,198,.35);
  background:rgba(5,7,14,.78);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--cyan);
  text-transform:uppercase;
}

.toc{
  position:sticky;
  top:calc(var(--h-header) + 26px);
  font-size:13px;
  line-height:1.6;
}
.toc a{
  display:block;
  padding:7px 0 7px 14px;
  border-left:1px solid var(--line);
  color:var(--muted);
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.toc a:hover{color:var(--text);border-left-color:var(--muted)}
.toc a[aria-current="true"]{color:var(--cyan);border-left-color:var(--cyan)}

html[data-js] [data-reveal]{opacity:0;transform:translateY(14px)}
html[data-js] [data-reveal][data-revealed="true"]{
  opacity:1;
  transform:none;
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}

/* ============ responsive ============ */
@media (max-width:1099px){
  .site-footer__top{grid-template-columns:1.2fr 1fr 1.1fr;gap:clamp(20px,3vw,40px)}
}
@media (max-width:959px){
  :root{--h-header:66px;--h-header-scrolled:58px}
  .brand__sub{display:none}
  .brand__glyph{width:24px;height:24px}
  .brand__name{font-size:18px}
  .nav-toggle{display:inline-flex}
  .nav-toggle__current{display:inline}
  .nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:none;
    padding:14px var(--gutter) 22px;
    background:rgba(8,13,23,.98);
    border-bottom:1px solid var(--line);
    box-shadow:0 34px 64px -34px #000;
  }
  .site-header[data-open="true"] .nav{display:block}
  .nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    padding:0;
    border:0;
    border-radius:0;
    background:none;
    box-shadow:none;
  }
  .nav__link{
    padding:12px 14px;
    border:1px solid transparent;
    border-radius:10px;
    font-size:16px;
  }
  .nav__link:hover{transform:none;background:rgba(232,239,249,.05)}
  .nav__link[aria-current="page"]{
    color:var(--cyan);
    font-weight:700;
    background:rgba(15,75,69,.55);
    border-color:rgba(43,227,198,.34);
  }
  .site-footer__top{grid-template-columns:1fr 1fr}
  .site-footer__brand{grid-column:1 / -1}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .grid-12 > *{grid-column:span var(--col-m,var(--col,6))}
  .toc{position:static}
}
@media (min-width:960px){
  .nav-toggle{display:none}
  .site-header[data-scrolled="true"] .nav-toggle{display:inline-flex}
  .site-header[data-scrolled="true"] .nav-toggle__current{display:inline}
  .site-header[data-scrolled="true"]:not([data-open="true"]) .nav__item:not([data-current="true"]){display:none}
  .site-header[data-scrolled="true"]:not([data-open="true"]) .nav__link{padding:5px 12px;font-size:13px}
  .site-header[data-scrolled="true"][data-open="true"] .nav{
    position:absolute;
    left:auto;
    right:max(var(--gutter),calc((100% - var(--shell)) / 2 + var(--gutter)));
    top:calc(100% + 12px);
    display:block;
    width:264px;
    padding:12px;
    border:1px solid var(--line);
    border-radius:var(--radius-l);
    background:rgba(10,16,28,.98);
    box-shadow:0 34px 70px -30px #000,0 0 0 1px rgba(43,227,198,.08);
  }
  .site-header[data-scrolled="true"][data-open="true"] .nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:2px;
  }
  .site-header[data-scrolled="true"][data-open="true"] .nav__item{display:block}
  .site-header[data-scrolled="true"][data-open="true"] .nav__link{
    text-align:left;
    padding:9px 12px;
    border-radius:10px;
  }
}
@media (min-width:1200px){
  .site-footer__axis{display:block}
}
@media (max-width:599px){
  :root{--gap:14px}
  .brand__name{font-size:17px;letter-spacing:.02em}
  .version-chip{padding:5px 9px;font-size:11px;gap:5px}
  .version-chip__label{display:none}
  .site-footer__top{grid-template-columns:1fr;gap:30px}
  .site-footer__brand{grid-column:auto}
  .site-footer__base{flex-direction:column;align-items:flex-start;gap:10px}
  .grid-12{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-12 > *{grid-column:span var(--col-s,2)}
  .footer-list--contact li{flex-direction:column;gap:2px}
  .footer-label{flex:none}
}

/* ============ motion / print ============ */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html[data-js] [data-reveal]{opacity:1;transform:none}
}
@media print{
  .site-header,.site-footer,.skip-link,.nav-toggle,.site-header__progress{display:none !important}
  body{background:#fff;color:#000}
}