/* ============================================================
   电玩城平台 /assets/site.css
   共享外壳：轨道导航、页脚、基础组件
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,hr{margin:0}
ul,ol{padding:0;list-style:none}
img,picture,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
[hidden]{display:none!important}

/* ---------- 2. Tokens ---------- */
:root{
  --void:#090812;
  --panel:#141124;
  --glass:#1F1A33;
  --violet:#8B5CF6;
  --blue:#2F7BFF;
  --cyan:#2EF2D0;
  --amber:#FF8A3D;
  --clay:#B86B4B;
  --moss:#718A68;
  --rock:#8D8A9E;
  --cream:#F5EFE6;
  --coral:#FF5C7A;

  --line:rgba(245,239,230,.10);
  --line-soft:rgba(245,239,230,.06);
  --line-strong:rgba(245,239,230,.20);

  --rail-w:240px;
  --topbar-h:64px;
  --shell-top:0px;
  --gutter:clamp(18px,4vw,48px);

  --font-display:"Barlow Condensed","Archivo Narrow","Oswald","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Sarasa Mono SC",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --font-serif:"Noto Serif SC","Songti SC",Georgia,"Times New Roman",serif;

  --fs-body:clamp(16px,.45vw + 14.5px,17.5px);
  --radius:3px;
  --ease:cubic-bezier(.22,.68,.35,1);

  --shadow-card:0 18px 44px rgba(4,3,10,.55);
}

/* ---------- 3. Base ---------- */
html{scroll-behavior:smooth}
body{
  min-height:100vh;
  padding-left:var(--rail-w);
  padding-top:var(--shell-top);
  background-color:var(--void);
  background-image:
    radial-gradient(900px 620px at 92% -8%,rgba(139,92,246,.16),transparent 70%),
    radial-gradient(760px 520px at 2% 104%,rgba(47,123,255,.12),transparent 70%);
  background-repeat:no-repeat;
  color:var(--cream);
  font-family:var(--font-body);
  font-size:var(--fs-body);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.18;letter-spacing:-.01em}
h1{font-size:clamp(2.4rem,6vw,4.6rem);line-height:1.02;letter-spacing:-.02em}
h2{font-size:clamp(1.7rem,3.4vw,2.6rem)}
h3{font-size:clamp(1.15rem,1.6vw,1.45rem);line-height:1.3}
p{max-width:68ch}
a{color:var(--blue);text-underline-offset:3px}
a:hover{color:var(--cyan)}
strong,b{color:#fff;font-weight:700}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px}
:focus:not(:focus-visible){outline:none}

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

/* ---------- 4. Skip link ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:300;
  display:inline-flex;align-items:center;min-height:44px;
  padding:10px 18px;
  font-family:var(--font-mono);font-size:.78rem;letter-spacing:.1em;
  color:#08101a;background:var(--cyan);text-decoration:none;
  border-radius:2px;box-shadow:0 10px 30px rgba(0,0,0,.5);
  transform:translateY(-160%);
  transition:transform .2s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0);color:#08101a}

/* ---------- 5. Header / rail nav ---------- */
.site-header{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);
  z-index:60;
  display:flex;flex-direction:column;
  background:linear-gradient(180deg,#0c0a17 0%,#141124 52%,#0a0913 100%);
  border-right:1px solid var(--line);
  transition:box-shadow .25s var(--ease);
}
.site-header::after{
  content:"";position:absolute;top:0;right:-1px;width:2px;height:100%;
  background:linear-gradient(180deg,rgba(139,92,246,0),var(--violet) 16%,var(--blue) 54%,var(--cyan) 82%,rgba(46,242,208,0));
  opacity:.62;pointer-events:none;
  animation:railGlow 7s ease-in-out infinite alternate;
}
@keyframes railGlow{from{opacity:.42}to{opacity:.85}}

.header-rail__top{
  display:flex;align-items:center;gap:12px;
  padding:22px 16px 18px;
}
.brand{
  display:flex;align-items:center;gap:12px;
  min-height:44px;text-decoration:none;color:var(--cream);
}
.brand__mark{
  position:relative;flex:none;width:38px;height:38px;
  background:linear-gradient(140deg,var(--violet),var(--blue));
  clip-path:polygon(14% 0,100% 0,100% 86%,86% 100%,0 100%,0 14%);
  display:grid;place-items:center;
}
.brand__mark::before{
  content:"";width:12px;height:12px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 14px rgba(46,242,208,.95);
}
.brand__text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand__name{
  font-family:var(--font-display);font-weight:800;font-size:1.16rem;
  letter-spacing:.04em;color:var(--cream);
}
.brand__kicker{
  font-family:var(--font-mono);font-size:.6rem;letter-spacing:.2em;
  color:var(--rock);text-transform:uppercase;
}
.brand:hover .brand__name{color:#fff}

.nav-toggle{display:none}

.rail-nav{
  display:flex;flex-direction:column;flex:1 1 auto;min-height:0;
  padding:6px 14px 20px;
  overflow:visible;
}
.rail-nav__list{display:flex;flex-direction:column;gap:2px}
.rail-nav__item{position:relative}
.rail-nav__link{
  position:relative;
  display:flex;align-items:center;gap:12px;
  min-height:44px;padding:8px 12px;
  border-left:2px solid transparent;border-radius:var(--radius);
  color:rgba(245,239,230,.74);text-decoration:none;
  font-size:.95rem;letter-spacing:.02em;
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.rail-nav__num{
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.08em;
  color:var(--violet);transition:color .18s var(--ease);
}
.rail-nav__label{white-space:nowrap}
.rail-nav__link:hover{color:var(--cream);background:rgba(31,26,51,.92)}
.rail-nav__link:hover .rail-nav__num{color:var(--cyan)}
.rail-nav__link[aria-current="page"]{
  color:#fff;
  background:linear-gradient(90deg,rgba(139,92,246,.28),rgba(139,92,246,0));
  border-left-color:var(--cyan);
}
.rail-nav__link[aria-current="page"] .rail-nav__num{color:var(--cyan)}

.rail-cta{
  display:flex;align-items:center;justify-content:center;
  min-height:46px;margin-top:auto;padding:10px 16px;
  font-family:var(--font-display);font-weight:800;font-size:.98rem;letter-spacing:.06em;
  color:#1a1024;text-decoration:none;
  background:linear-gradient(120deg,var(--amber),#ffb268);
  clip-path:polygon(12px 0,100% 0,calc(100% - 12px) 100%,0 100%);
  transition:filter .18s var(--ease),transform .18s var(--ease);
}
.rail-cta:hover{color:#1a1024;filter:brightness(1.08);transform:translateY(-1px)}
.rail-cta:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

.rail-progress{
  position:absolute;left:0;right:0;bottom:0;height:3px;
  background:rgba(245,239,230,.07);pointer-events:none;
}
.rail-progress__bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--violet),var(--blue) 52%,var(--cyan));
  box-shadow:0 0 12px rgba(46,242,208,.45);
  transition:transform .1s linear;
}

.nav-scrim{
  display:none;position:fixed;inset:0;z-index:65;
  background:rgba(6,5,12,.68);
  -webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);
  opacity:0;visibility:hidden;
  transition:opacity .26s var(--ease),visibility .26s var(--ease);
}

/* ---------- 6. Footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,120px);
  overflow:hidden;
  background:linear-gradient(180deg,#0b0916 0%,#12101f 38%,#090812 100%);
  border-top:1px solid rgba(139,92,246,.24);
}
.site-footer::before{
  content:"";position:absolute;top:-46%;left:-12%;width:124%;height:78%;
  background:radial-gradient(closest-side,rgba(139,92,246,.20),transparent 72%);
  transform:rotate(-6deg);pointer-events:none;
}
.footer-mark{
  position:absolute;right:-.06em;bottom:.02em;z-index:0;
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(6rem,17vw,15rem);line-height:.78;letter-spacing:.02em;
  color:rgba(139,92,246,.10);
  -webkit-text-stroke:1px rgba(139,92,246,.20);
  pointer-events:none;user-select:none;
}
.footer-strip{
  position:relative;z-index:1;
  display:flex;flex-wrap:wrap;gap:10px 26px;
  padding:11px var(--gutter);
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--rock);
}
.footer-strip__item{display:inline-flex;align-items:center;gap:8px}
.footer-strip__item::before{
  content:"";width:5px;height:5px;background:var(--cyan);
  box-shadow:0 0 8px rgba(46,242,208,.85);
}
.footer-inner{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1fr;gap:clamp(26px,4vw,44px);
  max-width:1280px;margin-inline:auto;
  padding:clamp(32px,5vw,60px) var(--gutter);
}
.footer-col{min-width:0}
.footer-title{
  display:block;margin-bottom:14px;padding-bottom:8px;
  border-bottom:1px solid rgba(139,92,246,.32);
  font-family:var(--font-mono);font-size:.7rem;font-weight:400;
  letter-spacing:.18em;text-transform:uppercase;color:var(--cream);
}
.footer-brand__name{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(1.4rem,2.4vw,1.8rem);letter-spacing:.03em;
  margin-bottom:10px;color:var(--cream);
}
.footer-brand__line{
  max-width:34ch;margin-bottom:16px;
  font-size:.94rem;line-height:1.75;color:rgba(245,239,230,.8);
}
.footer-note{
  font-family:var(--font-mono);font-size:.68rem;line-height:1.9;
  letter-spacing:.04em;color:var(--rock);max-width:36ch;
}
.footer-nav__list,.footer-legal__list{display:flex;flex-direction:column;gap:1px}
.footer-nav__link,.footer-legal__link{
  display:inline-flex;align-items:center;min-height:38px;
  color:rgba(245,239,230,.74);text-decoration:none;font-size:.92rem;
  transition:color .18s var(--ease),padding-left .18s var(--ease);
}
.footer-nav__link:hover,.footer-legal__link:hover{color:var(--cyan);padding-left:6px}
.footer-nav__link[aria-current="page"],.footer-legal__link[aria-current="page"]{color:var(--cyan)}
.footer-legal__link{font-size:.88rem;color:rgba(245,239,230,.66)}
.footer-contact__row{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  margin-bottom:10px;
}
.footer-contact__value{
  font-family:var(--font-mono);font-size:.82rem;letter-spacing:.02em;
  color:var(--cream);word-break:break-all;
}
.footer-contact__address{
  margin-bottom:12px;
  font-size:.88rem;line-height:1.75;color:rgba(245,239,230,.72);max-width:26ch;
}
.copy-btn{
  min-height:32px;padding:4px 10px;
  font-family:var(--font-mono);font-size:.64rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--rock);background:rgba(31,26,51,.85);
  border:1px solid rgba(141,138,158,.38);border-radius:2px;cursor:pointer;
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.copy-btn:hover{color:var(--cyan);border-color:var(--cyan)}
.copy-btn.is-copied{color:#08101a;background:var(--cyan);border-color:var(--cyan)}
.footer-base{
  position:relative;z-index:1;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 24px;padding:16px var(--gutter);
  border-top:1px solid var(--line);
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.08em;
  color:var(--rock);
}
.footer-base__icp{color:rgba(245,239,230,.66)}
.footer-base__copy{color:var(--rock)}

/* ---------- 7. Layout components ---------- */
.container{width:100%;max-width:1180px;margin-inline:auto;padding-inline:var(--gutter)}
.container--narrow{max-width:820px}
.section{padding-block:clamp(44px,6vw,88px)}
.section--tight{padding-block:clamp(28px,4vw,52px)}
.section-head{display:flex;flex-direction:column;gap:12px;margin-bottom:clamp(20px,3vw,36px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:.65em;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--cyan);flex:none}
.lede{
  font-size:clamp(1.02rem,1.3vw,1.16rem);line-height:1.8;
  color:rgba(245,239,230,.84);max-width:60ch;
}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.grid--split{grid-template-columns:1fr}
.diagonal-band{
  position:relative;
  background:linear-gradient(120deg,rgba(139,92,246,.18),rgba(47,123,255,.08) 60%,rgba(46,242,208,.06));
  clip-path:polygon(0 2.6vw,100% 0,100% calc(100% - 2.6vw),0 100%);
}

/* ---------- 8. Cards / tags / numbers ---------- */
.card{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  background:var(--panel);
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
}
.card--glass{
  background:rgba(31,26,51,.74);
  border-color:rgba(139,92,246,.28);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
}
.card--accent{border-left:3px solid var(--cyan)}
.num-badge{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:2.8em;padding:.22em .5em;
  font-family:var(--font-mono);font-size:.76rem;letter-spacing:.1em;
  color:var(--violet);border-bottom:2px solid var(--violet);
}
.tag{
  display:inline-flex;align-items:center;gap:.42em;
  padding:.26em .68em;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--cyan);background:rgba(46,242,208,.08);
  border:1px solid rgba(46,242,208,.3);border-radius:2px;
}
.tag--violet{color:#c4aaff;background:rgba(139,92,246,.12);border-color:rgba(139,92,246,.42)}
.tag--amber{color:#ffc194;background:rgba(255,138,61,.12);border-color:rgba(255,138,61,.42)}
.tag--coral{color:#ffb3c0;background:rgba(255,92,122,.12);border-color:rgba(255,92,122,.42)}
.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{
  font-family:var(--font-mono);font-weight:700;
  font-size:clamp(1.6rem,4vw,2.6rem);line-height:1;letter-spacing:.02em;
  color:var(--cyan);
}
.stat__label{
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--rock);
}

/* ---------- 9. Buttons ---------- */
.btn{
  position:relative;z-index:0;
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  min-height:46px;padding:12px 24px;
  font-family:var(--font-display);font-weight:800;font-size:1rem;letter-spacing:.05em;
  text-decoration:none;border:1px solid transparent;border-radius:2px;
  cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn--primary{color:#1a1024}
.btn--primary::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(120deg,var(--amber),#ffb268);
  clip-path:polygon(12px 0,100% 0,calc(100% - 12px) 100%,0 100%);
  transition:filter .18s var(--ease);
}
.btn--primary:hover{color:#1a1024;transform:translateY(-2px);box-shadow:0 12px 28px rgba(255,138,61,.26)}
.btn--primary:hover::before{filter:brightness(1.08)}
.btn--ghost{
  color:var(--cream);background:rgba(31,26,51,.62);
  border-color:rgba(46,242,208,.34);
}
.btn--ghost:hover{color:var(--cyan);border-color:var(--cyan);box-shadow:inset 0 0 0 1px rgba(46,242,208,.3)}
.btn--sm{min-height:38px;padding:8px 16px;font-size:.86rem}

/* ---------- 10. Breadcrumb / prose ---------- */
.breadcrumb{
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.08em;color:var(--rock);
}
.breadcrumb__list{display:flex;flex-wrap:wrap;gap:.55em;align-items:center}
.breadcrumb__item{display:inline-flex;align-items:center;gap:.55em}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:rgba(141,138,158,.55)}
.breadcrumb__link{color:var(--rock);text-decoration:none}
.breadcrumb__link:hover{color:var(--cyan)}
.prose{max-width:68ch;font-size:1.02rem;line-height:1.85;color:rgba(245,239,230,.86)}
.prose > * + *{margin-top:1.05em}
.prose h2{margin-top:1.9em;font-size:clamp(1.4rem,2.4vw,1.85rem);color:#fff}
.prose h3{margin-top:1.6em;color:#fff}
.prose ul,.prose ol{padding-left:1.35em;list-style:disc}
.prose ol{list-style:decimal}
.prose li + li{margin-top:.45em}
.prose a{color:var(--cyan)}

/* ---------- 11. Media frame (页面阶段放图) ---------- */
.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/9;
  background:linear-gradient(135deg,#1a1630,#0e0c1b);
  border:1px solid rgba(139,92,246,.24);
  border-radius:var(--radius);
}
.media-frame > img,
.media-frame > picture,
.media-frame > picture > img{
  width:100%;height:100%;object-fit:cover;display:block;
}
.media-frame::before{
  content:"";position:absolute;top:10px;left:10px;width:26px;height:26px;
  border-top:2px solid var(--cyan);border-left:2px solid var(--cyan);
  opacity:.85;z-index:2;pointer-events:none;
}
.media-frame::after{
  content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
  background:repeating-linear-gradient(0deg,rgba(9,8,18,.22) 0 1px,transparent 1px 3px);
  opacity:.55;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--portrait{aspect-ratio:3/4}
.media-frame__caption{
  position:absolute;left:12px;bottom:12px;z-index:3;
  padding:5px 10px;
  font-family:var(--font-mono);font-size:.64rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--cream);background:rgba(9,8,18,.72);
  border:1px solid rgba(46,242,208,.3);border-radius:2px;
}

/* ---------- 12. Filter bar ---------- */
.filter-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:10px;
  background:rgba(31,26,51,.78);
  border:1px solid rgba(139,92,246,.26);
  border-radius:var(--radius);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
}
.filter-bar--sticky{position:sticky;top:calc(var(--shell-top) + 12px);z-index:30}
.filter-bar__btn{
  min-height:40px;padding:8px 14px;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;
  color:rgba(245,239,230,.72);
  background:transparent;
  border:1px solid rgba(245,239,230,.16);border-radius:2px;
  cursor:pointer;
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.filter-bar__btn:hover{color:var(--cream);border-color:rgba(46,242,208,.55)}
.filter-bar__btn[aria-pressed="true"]{
  color:#08101a;background:var(--cyan);border-color:var(--cyan);
  box-shadow:0 0 18px rgba(46,242,208,.35);
}
.filter-bar__status{
  margin-left:auto;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.08em;color:var(--rock);
}

/* ---------- 13. Reveal ---------- */
.reveal-ready [data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
}
.reveal-ready [data-reveal].is-revealed{opacity:1;transform:none}

/* ---------- 14. Responsive ---------- */
@media (max-width:1199px) and (min-width:900px){
  :root{--rail-w:92px}
  .header-rail__top{justify-content:center;padding:20px 10px 16px}
  .brand__text{display:none}
  .rail-nav{padding:6px 10px 18px}
  .rail-nav__link{justify-content:center;gap:0;padding:12px 0}
  .rail-nav__label{
    position:absolute;width:1px;height:1px;overflow:hidden;
    clip-path:inset(50%);white-space:nowrap;
  }
  .rail-nav__link:hover .rail-nav__label,
  .rail-nav__link:focus-visible .rail-nav__label{
    position:absolute;left:calc(100% + 12px);top:50%;transform:translateY(-50%);
    width:auto;height:auto;overflow:visible;clip-path:none;
    padding:8px 14px;white-space:nowrap;
    font-size:.84rem;color:var(--cream);
    background:var(--glass);
    border:1px solid rgba(46,242,208,.36);border-radius:3px;
    box-shadow:0 12px 30px rgba(0,0,0,.6);z-index:40;
  }
  .rail-cta{padding:10px 4px;font-size:.78rem;letter-spacing:.02em}
}

@media (max-width:899px){
  :root{--rail-w:0px;--shell-top:64px}
  body{padding-left:0;padding-top:var(--shell-top)}
  .site-header{
    top:0;left:0;right:0;bottom:auto;
    width:100%;height:var(--topbar-h);
    flex-direction:row;align-items:center;
    padding:0 14px;
    border-right:0;border-bottom:1px solid var(--line);
    background:linear-gradient(180deg,rgba(12,10,23,.98),rgba(20,17,36,.98));
    -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  }
  .site-header::after{display:none}
  .site-header.is-stuck{box-shadow:0 12px 26px rgba(3,2,8,.6)}
  .header-rail__top{
    position:relative;z-index:80;
    flex:1 1 auto;width:100%;justify-content:space-between;
    padding:0;
  }
  .brand__kicker{font-size:.55rem;letter-spacing:.16em}
  .nav-toggle{
    display:grid;place-items:center;
    width:44px;height:44px;flex:none;
    background:rgba(31,26,51,.9);
    border:1px solid rgba(139,92,246,.42);border-radius:4px;
    cursor:pointer;
  }
  .nav-toggle__bars{display:flex;flex-direction:column;gap:4px;align-items:center}
  .nav-toggle__bar{
    display:block;width:18px;height:2px;border-radius:1px;
    background:var(--cream);
    transition:transform .22s var(--ease),opacity .16s var(--ease),background-color .18s var(--ease);
  }
  .site-header[data-open] .nav-toggle__bar{background:var(--cyan)}
  .site-header[data-open] .nav-toggle__bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .site-header[data-open] .nav-toggle__bar:nth-child(2){opacity:0;transform:scaleX(.2)}
  .site-header[data-open] .nav-toggle__bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

  .rail-nav{
    position:fixed;top:var(--topbar-h);left:0;bottom:0;z-index:70;
    width:min(84vw,340px);
    padding:18px 16px calc(20px + env(safe-area-inset-bottom,0px));
    background:linear-gradient(180deg,#141124,#0a0913);
    border-right:1px solid rgba(139,92,246,.36);
    box-shadow:18px 0 40px rgba(3,2,8,.55);
    transform:translateX(-102%);
    visibility:hidden;
    overflow-y:auto;
    -webkit-overflow-scrolling:touch;
    transition:transform .28s var(--ease),visibility .28s var(--ease);
  }
  .site-header[data-open] .rail-nav{transform:translateX(0);visibility:visible}
  .rail-nav__link{min-height:50px;font-size:1rem}
  .rail-cta{margin-top:22px}

  .nav-scrim{display:block}
  .site-header[data-open] .nav-scrim{opacity:1;visibility:visible}

  body.nav-open{overflow:hidden}

  .footer-inner{grid-template-columns:1fr}
  .footer-mark{font-size:clamp(5rem,26vw,10rem);bottom:auto;top:-.12em;opacity:.7}
  .footer-base{justify-content:flex-start}
}

@media (min-width:720px) and (max-width:1079px){
  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-col--brand{grid-column:1 / -1}
}
@media (min-width:1080px){
  .footer-inner{grid-template-columns:1.6fr .8fr .8fr 1.1fr}
  .grid--split{grid-template-columns:38fr 62fr;align-items:start}
  .grid--split--rev{grid-template-columns:62fr 38fr}
}

/* ---------- 15. 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;
  }
  .site-header::after{animation:none;opacity:.6}
  .reveal-ready [data-reveal]{opacity:1;transform:none}
}