:root{
  --ink-900:#0B1220;
  --ink-800:#101B2E;
  --teal-900:#0E3B3E;
  --teal-950:#0B2A2E;
  --wine-700:#7A1E33;
  --wine-900:#4A1120;
  --cyan:#00E5FF;
  --orange:#FF6A1A;
  --lime:#C6FF3D;
  --white:#E8EEF7;
  --mist:#9AA9BF;
  --steel:#2A3A52;
  --rail-w:88px;
  --topbar-h:56px;
  --gutter:24px;
  --diag:6deg;
  --radius:12px;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",ui-monospace,Menlo,Consolas,"Liberation Mono",monospace;
}

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

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

body{
  min-height:100vh;
  background:var(--ink-900);
  color:var(--white);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  padding-top:var(--topbar-h);
  padding-left:var(--rail-w);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    repeating-linear-gradient(-6deg,rgba(0,229,255,.055) 0 1px,transparent 1px 168px),
    repeating-linear-gradient(84deg,rgba(255,106,26,.045) 0 1px,transparent 1px 232px);
}
#main-content{
  position:relative;
  z-index:1;
  scroll-margin-top:calc(var(--topbar-h) + 12px);
}

h1,h2,h3,h4{font-weight:900;line-height:1.18;letter-spacing:-.01em}
h1{font-size:clamp(34px,5.4vw,64px)}
h2{font-size:clamp(26px,3.4vw,44px)}
h3{font-size:clamp(19px,2vw,24px);line-height:1.32}
.display{font-weight:900;line-height:1.1;letter-spacing:-.02em}
.tilt{transform:skewX(-3deg)}
p{max-width:70ch}
strong{font-weight:700;color:var(--white)}

.wrap{
  width:100%;
  max-width:1240px;
  margin-inline:auto;
  padding-inline:clamp(18px,3.4vw,44px);
}

/* ---------- 头部框架 ---------- */
.site-header{position:relative;z-index:80}

.topbar{
  position:fixed;
  top:0;left:0;right:0;
  height:var(--topbar-h);
  z-index:90;
  display:flex;
  align-items:center;
  background:rgba(11,18,32,.9);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--steel);
}
.topbar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  width:100%;
  height:100%;
  padding:0 16px 0 16px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--white);
  min-width:0;
}
.brand__mark{
  position:relative;
  flex:0 0 auto;
  width:30px;height:30px;
  border:1px solid rgba(0,229,255,.55);
  border-radius:50%;
  background:radial-gradient(circle at 50% 50%,rgba(0,229,255,.18),transparent 70%);
  transition:border-color .2s,box-shadow .2s;
}
.brand__mark::before{
  content:"";position:absolute;left:50%;top:-4px;bottom:-4px;width:1px;
  background:var(--cyan);transform:translateX(-50%);
}
.brand__mark::after{
  content:"";position:absolute;top:50%;left:-4px;right:-4px;height:1px;
  background:var(--orange);transform:translateY(-50%);
}
.brand:hover .brand__mark{border-color:var(--lime);box-shadow:0 0 0 4px rgba(198,255,61,.12)}
.brand__text{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.brand__name{font-size:16px;font-weight:900;letter-spacing:.06em;transform:skewX(-6deg)}
.brand__sub{font-size:10px;letter-spacing:.24em;color:var(--mist);white-space:nowrap}

.topbar__meta{display:flex;align-items:center;gap:10px;margin-left:auto}

.round-badge{
  display:inline-flex;
  align-items:baseline;
  gap:8px;
  padding:6px 12px;
  border:1px solid rgba(0,229,255,.42);
  border-radius:999px;
  background:rgba(0,229,255,.07);
  transition:border-color .2s,background .2s,transform .2s;
}
.round-badge:hover{border-color:var(--lime);background:rgba(198,255,61,.1);transform:translateX(-2px)}
.round-badge[aria-expanded="true"]{border-color:var(--lime);background:rgba(198,255,61,.15)}
.round-badge__no{font-family:var(--font-mono);font-size:12px;font-weight:700;color:var(--lime);letter-spacing:.06em}
.round-badge__hint{font-size:11px;color:var(--mist);letter-spacing:.08em}

.sync-card{
  position:absolute;
  top:calc(var(--topbar-h) + 8px);
  right:14px;
  z-index:95;
  width:min(310px,calc(100vw - 28px));
  padding:16px 18px 18px;
  border:1px solid var(--steel);
  border-radius:2px 2px var(--radius) var(--radius);
  background:rgba(16,27,46,.97);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  box-shadow:0 22px 48px rgba(0,0,0,.55);
}
.sync-card::before{
  content:"";position:absolute;top:0;left:0;width:70px;height:3px;background:var(--orange);
}
.sync-card__title{
  font-size:11px;letter-spacing:.24em;color:var(--cyan);font-family:var(--font-mono);margin-bottom:10px;
}
.sync-card__row{
  display:flex;justify-content:space-between;gap:12px;
  padding:6px 0;font-size:13px;
  border-bottom:1px dashed rgba(42,58,82,.95);
}
.sync-card__k{color:var(--mist);letter-spacing:.08em}
.sync-card__text{margin-top:10px;font-size:13px;line-height:1.65;color:var(--mist)}
.sync-card__link{
  display:inline-block;margin-top:12px;font-size:13px;font-weight:700;color:var(--orange);
  border-bottom:1px solid transparent;transition:border-color .2s,color .2s;
}
.sync-card__link:hover{color:var(--lime);border-bottom-color:var(--lime)}

.mono{font-family:var(--font-mono);font-weight:700;letter-spacing:.02em;color:var(--lime)}

.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:8px 10px;
  border:1px solid var(--steel);
  border-radius:8px;
  color:var(--white);
  transition:border-color .2s,background .2s;
}
.nav-toggle:hover{border-color:var(--cyan);background:rgba(0,229,255,.08)}
.nav-toggle__box{display:grid;gap:3px;width:16px}
.nav-toggle__box span{display:block;height:2px;background:var(--cyan);transition:transform .2s,opacity .2s}
.nav-toggle[aria-expanded="true"] .nav-toggle__box span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__box span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__box span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-toggle__label{font-size:11px;letter-spacing:.16em;color:var(--mist)}

/* ---------- 左侧竖框导航 ---------- */
.rail{
  position:fixed;
  top:var(--topbar-h);
  left:0;
  bottom:0;
  width:var(--rail-w);
  z-index:85;
  display:flex;
  flex-direction:column;
  padding:12px 0 16px;
  background:linear-gradient(180deg,var(--ink-800) 0%,var(--ink-900) 62%);
  border-right:1px solid var(--steel);
}
.rail__hint{
  margin:0 0 10px;
  text-align:center;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  color:var(--mist);
}
.rail__list{
  flex:1 1 auto;
  display:flex;
  flex-direction:column;
  overflow-y:auto;
  scrollbar-width:thin;
}
.rail__item{border-top:1px solid rgba(42,58,82,.85)}
.rail__item:last-child{border-bottom:1px solid rgba(42,58,82,.85)}
.rail__link{
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:8px;
  padding:15px 4px;
  color:var(--mist);
  transition:color .2s,background .2s;
}
.rail__link::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:transparent;transition:background .2s;
}
.rail__link:hover{color:var(--cyan);background:rgba(0,229,255,.07)}
.rail__link:hover::before{background:var(--cyan)}
.rail__no{
  font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.08em;color:currentColor;
}
.rail__label{
  writing-mode:vertical-rl;
  text-orientation:upright;
  font-size:12px;
  letter-spacing:.2em;
  line-height:1;
}
.rail__link[aria-current="page"]{color:var(--lime);background:rgba(198,255,61,.09)}
.rail__link[aria-current="page"]::before{background:var(--lime)}
.rail__link[aria-current="page"] .rail__no{color:var(--lime)}

.rail__cta{
  margin:14px auto 0;
  display:flex;
  align-items:center;
  justify-content:center;
  writing-mode:vertical-rl;
  text-orientation:upright;
  padding:16px 9px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--ink-900);
  background:var(--orange);
  clip-path:polygon(0 0,100% 5%,100% 100%,0 95%);
  transition:transform .2s,filter .2s;
}
.rail__cta:hover{transform:translate(4px,-4px);filter:brightness(1.08)}

.nav-scrim{
  position:fixed;
  inset:0;
  z-index:94;
  background:rgba(6,10,18,.62);
  -webkit-backdrop-filter:blur(2px);
  backdrop-filter:blur(2px);
}

.skip-link{
  position:fixed;
  top:8px;left:8px;
  z-index:120;
  padding:10px 16px;
  background:var(--lime);
  color:var(--ink-900);
  font-weight:700;
  font-size:14px;
  border-radius:6px;
  transform:translateY(-180%);
  transition:transform .2s ease;
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0)}

/* ---------- 滚动进度 ---------- */
.scroll-progress{
  position:fixed;
  top:var(--topbar-h);
  left:0;right:0;
  height:2px;
  z-index:92;
  background:rgba(42,58,82,.65);
  pointer-events:none;
}
.scroll-progress span{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--lime));
  transition:width .12s linear;
}

/* ---------- 通用章节与排版 ---------- */
.section{padding-block:clamp(40px,6vw,84px)}
.section--tight{padding-block:clamp(26px,3.5vw,48px)}
.band{
  position:relative;
  padding-block:clamp(36px,5vw,72px);
  overflow:hidden;
}
.band--teal{background:linear-gradient(118deg,var(--teal-900),var(--teal-950) 72%)}
.band--wine{background:linear-gradient(118deg,var(--wine-700),var(--wine-900) 76%)}
.band--indigo{background:var(--ink-800)}
.band::after{
  content:"";
  position:absolute;inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(-6deg,rgba(232,238,247,.05) 0 1px,transparent 1px 56px);
}
.band > *{position:relative;z-index:1}

.coord{position:relative;padding-left:34px}
.coord::before,.coord::after{content:"";position:absolute;background:var(--cyan)}
.coord::before{left:4px;top:.72em;width:16px;height:1px}
.coord::after{left:11.5px;top:calc(.72em - 8px);width:1px;height:17px}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--orange)}

.vlabel{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--mist);
}
.prose{max-width:68ch;color:var(--mist)}
.prose p + p{margin-top:1em}
.prose strong{color:var(--white)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 22px;
  font-size:15px;
  font-weight:700;
  letter-spacing:.05em;
  border:1px solid transparent;
  border-radius:2px;
  transition:transform .2s,background .2s,color .2s,border-color .2s,filter .2s;
}
.btn--solid{background:var(--orange);color:var(--ink-900)}
.btn--solid:hover{transform:translate(4px,-4px);filter:brightness(1.08)}
.btn--ghost{border-color:var(--steel);color:var(--white)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translate(4px,-4px)}
.btn--lime{background:var(--lime);color:var(--ink-900)}
.btn--lime:hover{transform:translate(4px,-4px);filter:brightness(1.05)}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--mist);
}
.crumbs li{display:flex;align-items:center;gap:6px}
.crumbs li:not(:last-child)::after{content:"/";color:var(--steel)}
.crumbs a{color:var(--mist);border-bottom:1px solid transparent;transition:color .2s,border-color .2s}
.crumbs a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.crumbs li[aria-current="page"]{color:var(--lime)}

/* ---------- 栅格与卡片 ---------- */
.grid{display:grid;gap:var(--gutter)}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,4fr)}
.grid--asym{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
.grid--cards{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}

.card{
  padding:clamp(18px,2.4vw,26px);
  border:1px solid var(--steel);
  border-radius:var(--radius);
  background:var(--ink-800);
  transition:border-color .2s,background .2s,transform .2s;
}
.card:hover{border-color:rgba(0,229,255,.55);transform:translateY(-2px)}
.card--glass{
  background:rgba(232,238,247,.06);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}

.stat{
  display:flex;
  flex-direction:column;
  gap:2px;
  padding:14px 16px;
  border:1px solid var(--steel);
  border-radius:10px;
  background:rgba(232,238,247,.04);
  transition:background .2s,border-color .2s;
}
.stat:hover{background:rgba(0,229,255,.08);border-color:var(--cyan)}
.stat__num{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(22px,3vw,30px);
  line-height:1.15;
  color:var(--lime);
}
.stat__label{font-size:12px;letter-spacing:.14em;color:var(--mist)}

/* ---------- 折叠 ---------- */
.fold{
  border:1px solid var(--steel);
  border-radius:10px;
  background:rgba(232,238,247,.04);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .2s,background .2s;
}
.fold:hover{border-color:rgba(0,229,255,.5)}
.fold > summary{
  display:flex;
  align-items:center;
  gap:12px;
  padding:14px 18px;
  font-weight:700;
  cursor:pointer;
  list-style:none;
  color:var(--white);
}
.fold > summary::-webkit-details-marker{display:none}
.fold > summary::before{
  content:"";
  flex:0 0 auto;
  width:8px;height:8px;
  border-right:2px solid var(--cyan);
  border-bottom:2px solid var(--cyan);
  transform:rotate(-45deg);
  transition:transform .2s;
}
.fold[open] > summary::before{transform:rotate(45deg)}
.fold__body{padding:0 18px 18px;font-size:15px;line-height:1.75;color:var(--mist)}

/* ---------- 标签过滤 ---------- */
.tagbar{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  padding:7px 14px;
  font-size:13px;
  letter-spacing:.06em;
  border:1px solid var(--steel);
  border-radius:999px;
  color:var(--mist);
  transition:border-color .2s,color .2s,background .2s;
}
.tag:hover{border-color:var(--cyan);color:var(--cyan)}
.tag[aria-pressed="true"]{background:var(--orange);border-color:var(--orange);color:var(--ink-900);font-weight:700}

/* ---------- 图片容器基座 ---------- */
.media{
  position:relative;
  overflow:hidden;
  width:100%;
  aspect-ratio:16/10;
  border:1px solid var(--steel);
  border-radius:var(--radius);
  background:
    radial-gradient(120% 90% at 18% 8%,rgba(0,229,255,.2),transparent 62%),
    radial-gradient(100% 85% at 86% 92%,rgba(255,106,26,.22),transparent 66%),
    linear-gradient(158deg,var(--ink-800),var(--ink-900));
}
.media::after{
  content:"";
  position:absolute;inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(-6deg,rgba(232,238,247,.07) 0 1px,transparent 1px 44px);
}
.media img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media__tag{
  position:absolute;
  left:14px;bottom:14px;
  z-index:2;
  padding:5px 10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--ink-900);
  background:var(--lime);
  border-radius:2px;
}

/* ---------- 显现协议 ---------- */
.js-reveal [data-reveal]{opacity:0;transform:translateY(10px)}
.js-reveal [data-reveal].is-visible{
  opacity:1;
  transform:none;
  transition:opacity .2s ease,transform .25s ease;
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(56px,7vw,120px);
  padding-block:clamp(36px,5vw,64px) 26px;
  background:linear-gradient(180deg,rgba(14,59,62,.42) 0%,var(--ink-800) 34%,var(--ink-900) 100%);
  border-top:1px solid var(--steel);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:7px;
  background:linear-gradient(90deg,var(--orange),var(--cyan));
  clip-path:polygon(0 0,100% 0,100% 34%,0 100%);
}
.footer__lead{display:flex;flex-direction:column;gap:12px}
.footer__claim{
  font-size:clamp(20px,2.6vw,30px);
  font-weight:900;
  line-height:1.36;
  max-width:26ch;
  letter-spacing:-.01em;
}
.footer__grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.5fr;
  gap:clamp(20px,3vw,36px);
  margin-top:clamp(26px,3.4vw,40px);
  padding-top:clamp(22px,3vw,32px);
  border-top:1px solid var(--steel);
}
.footer__col{display:flex;flex-direction:column;gap:12px;min-width:0}
.footer__head{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  color:var(--cyan);
}
.footer__links{display:flex;flex-direction:column;gap:6px}
.footer__links a{
  position:relative;
  display:inline-block;
  padding:2px 0;
  font-size:14px;
  color:var(--mist);
  transition:color .2s;
}
.footer__links a::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:0;height:1px;
  background:var(--cyan);
  transition:width .2s;
}
.footer__links a:hover{color:var(--white)}
.footer__links a:hover::after{width:100%}
.footer__note{font-size:13px;line-height:1.7;color:var(--mist);max-width:36ch}
.footer__rows{display:flex;flex-direction:column;gap:10px}
.footer__row{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
}
.footer__row--stack{align-items:flex-start}
.footer__k{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--mist);
  min-width:32px;
}
.footer__val{
  font-family:var(--font-mono);
  font-weight:500;
  font-size:13px;
  color:var(--white);
  word-break:break-all;
}
.copy-btn{
  padding:3px 9px;
  font-size:11px;
  letter-spacing:.1em;
  color:var(--mist);
  border:1px solid var(--steel);
  border-radius:999px;
  transition:color .2s,border-color .2s,background .2s;
}
.copy-btn:hover{color:var(--cyan);border-color:var(--cyan)}
.copy-btn[data-copied]{
  color:var(--ink-900);
  background:var(--lime);
  border-color:var(--lime);
  font-weight:700;
}
.footer__sync{
  display:flex;
  align-items:center;
  gap:10px;
  margin-top:clamp(22px,3vw,32px);
  padding-top:18px;
  border-top:1px solid var(--steel);
  font-size:13px;
  color:var(--mist);
  max-width:none;
}
.dot{
  flex:0 0 auto;
  width:7px;height:7px;
  border-radius:50%;
  background:var(--lime);
  box-shadow:0 0 0 3px rgba(198,255,61,.16);
}
.footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 20px;
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist);
}
.footer__base p{max-width:none}
.footer__icp{color:var(--mist)}
.footer__domain{color:var(--steel)}

/* ---------- 平板 ---------- */
@media (max-width:1080px){
  body{font-size:16px}
  .footer__grid{grid-template-columns:1fr 1fr;gap:28px}
}

/* ---------- 移动端框架切换 ---------- */
@media (max-width:900px){
  body{padding-left:0}
  .nav-toggle{display:inline-flex}
  .rail{
    position:fixed;
    top:auto;
    left:0;right:0;bottom:0;
    width:auto;
    max-height:78vh;
    overflow-y:auto;
    padding:12px 14px calc(16px + env(safe-area-inset-bottom));
    border-right:0;
    border-top:1px solid var(--steel);
    border-radius:14px 14px 0 0;
    box-shadow:0 -20px 54px rgba(0,0,0,.62);
    z-index:96;
    transform:translateY(103%);
    transition:transform .28s cubic-bezier(.2,.7,.3,1);
  }
  .rail[data-open]{transform:translateY(0)}
  .rail__hint{display:none}
  .rail__list{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:8px;
    flex:0 0 auto;
    overflow:visible;
  }
  .rail__item{border:0}
  .rail__link{
    flex-direction:row;
    justify-content:flex-start;
    gap:12px;
    padding:12px;
    border:1px solid var(--steel);
    border-radius:8px;
    background:rgba(232,238,247,.05);
  }
  .rail__link::before{display:none}
  .rail__label{writing-mode:horizontal-tb;text-orientation:initial;font-size:14px;letter-spacing:.08em}
  .rail__link[aria-current="page"]{border-color:var(--lime);background:rgba(198,255,61,.12)}
  .rail__cta{
    writing-mode:horizontal-tb;
    text-orientation:initial;
    margin-top:12px;
    padding:14px 18px;
    clip-path:none;
    border-radius:8px;
    letter-spacing:.14em;
  }
  body.nav-open{overflow:hidden}
  .scroll-progress{top:var(--topbar-h)}
}

@media (max-width:640px){
  .topbar__inner{padding:0 12px}
  .brand__sub{display:none}
  .round-badge__hint{display:none}
  .round-badge{padding:5px 10px}
  .footer__grid{grid-template-columns:1fr;gap:24px}
  .footer__base{flex-direction:column;align-items:flex-start;gap:6px}
  .footer__sync{align-items:flex-start;font-size:12px}
  p{max-width: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;
    scroll-behavior:auto !important;
  }
  .js-reveal [data-reveal]{opacity:1;transform:none}
  .btn:hover,.rail__cta:hover,.card:hover,.round-badge:hover{transform:none}
}