/* ==========================================================================
   vip-lounge-weisiren.com.cn · shared site kit
   ========================================================================== */

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid #22E0D6;outline-offset:2px;border-radius:6px}

:root{
  --ink:#070B1A;
  --ink-2:#0A1028;
  --panel:#101A36;
  --panel-2:#0B1330;
  --violet:#7B5CFF;
  --violet-deep:#4C33C9;
  --cyan:#22E0D6;
  --gold:#F5C45A;
  --paper:#F3E9D6;
  --mist:#A9B6D6;
  --track:#3A2C6E;
  --green:#3BD98A;

  --rail-w:88px;
  --topbar-h:40px;
  --maxw:1280px;
  --radius:14px;

  --font-display:"Impact","Haettenschweiler","Arial Narrow","Noto Sans SC","Source Han Sans SC","PingFang SC",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Noto Sans Mono CJK SC","PingFang SC",monospace;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;

  --shadow-lift:0 18px 40px -24px rgba(123,92,255,.75);
  --edge:1px solid var(--track);
}

/* ---------- page base ---------- */
body{
  min-height:100vh;
  padding-top:var(--topbar-h);
  background-color:var(--ink);
  background-image:
    radial-gradient(62% 42% at 80% -8%, rgba(123,92,255,.30), transparent 62%),
    radial-gradient(48% 40% at 2% 104%, rgba(34,224,214,.15), transparent 60%);
  background-repeat:no-repeat;
  color:var(--mist);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(58,44,110,.30) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(58,44,110,.30) 1px, transparent 1px);
  background-size:72px 72px;
  opacity:.55;
  -webkit-mask-image:radial-gradient(120% 92% at 50% 0%, #000 18%, transparent 78%);
  mask-image:radial-gradient(120% 92% at 50% 0%, #000 18%, transparent 78%);
}
#main-content{position:relative;z-index:1;display:block}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;left:14px;top:-72px;z-index:200;
  padding:11px 18px;
  background:var(--cyan);color:#03131A;
  font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:.08em;
  border-radius:0 0 12px 12px;
  transition:top .18s ease;
}
.skip-link:focus{top:0}

/* ---------- top strip ---------- */
.topbar{
  position:fixed;left:0;right:0;top:0;height:var(--topbar-h);z-index:30;
  background:rgba(7,11,26,.94);
  border-bottom:1px solid var(--track);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}
.topbar__inner{
  height:100%;display:flex;align-items:center;gap:18px;
  padding:0 16px;
}
.topbar__brand-line{
  display:flex;align-items:center;gap:9px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  color:var(--paper);white-space:nowrap;
}
.topbar__brand-line::before{
  content:"";width:7px;height:7px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 10px rgba(34,224,214,.85);flex:none;
}
.topbar__tagline{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:rgba(169,182,214,.7);white-space:nowrap;
  padding-left:18px;border-left:1px solid var(--track);
}
.topbar__tail{margin-left:auto;display:flex;align-items:center;gap:16px}
.topbar__util{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--mist);padding-bottom:2px;
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.topbar__util:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.topbar__progress{
  position:absolute;left:0;bottom:0;width:100%;height:2px;
  background:linear-gradient(90deg,var(--violet),var(--cyan) 70%,var(--gold));
  transform:scaleX(0);transform-origin:0 50%;
  will-change:transform;pointer-events:none;
}

/* ---------- version chip ---------- */
.version-chip{
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.06em;
  color:var(--gold);
  padding:3px 11px;
  border:1px solid rgba(245,196,90,.55);
  border-radius:999px;
  background:rgba(245,196,90,.10);
  white-space:nowrap;
}
.version-chip--gold{box-shadow:0 0 0 3px rgba(245,196,90,.08)}
.version-chip--sm{font-size:11px;padding:2px 9px}

/* ---------- header shell ---------- */
.site-header{position:relative;z-index:90}

/* ---------- mobile bar ---------- */
.mobilebar{display:none}

/* ---------- rail / drawer ---------- */
.rail{
  position:fixed;left:0;top:var(--topbar-h);bottom:0;width:var(--rail-w);z-index:40;
  display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:18px 0 16px;
  background:linear-gradient(180deg,#0A1230 0%,#0C1533 58%,#070B1A 100%);
  border-right:1px solid var(--track);
}
.rail::after{
  content:"";position:absolute;top:0;right:-1px;width:1px;height:100%;
  background:linear-gradient(180deg,var(--violet),transparent 46%,var(--cyan));
  opacity:.45;pointer-events:none;
}
.rail__close{display:none}

.rail__brand{
  display:flex;flex-direction:column;align-items:center;gap:9px;
  width:100%;padding-bottom:14px;border-bottom:1px solid var(--track);
}
.rail__mark{
  width:40px;height:40px;display:grid;place-items:center;
  border-radius:12px;
  background:linear-gradient(150deg,var(--violet),var(--track) 78%);
  color:var(--paper);
  font-family:var(--font-display);font-size:22px;line-height:1;
  box-shadow:0 0 0 1px rgba(34,224,214,.35), 0 10px 24px -10px rgba(123,92,255,.9);
}
.rail__name{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.30em;
  color:var(--mist);
}

.rail__nav{
  flex:1 1 auto;min-height:0;width:100%;
  overflow-y:auto;overflow-x:hidden;
  padding:4px 0;
  scrollbar-width:none;
}
.rail__nav::-webkit-scrollbar{display:none}
.rail__list{display:flex;flex-direction:column;align-items:center;gap:4px}
.rail__item{width:100%;display:flex;justify-content:center}
.rail__link{
  position:relative;
  display:flex;flex-direction:column;align-items:center;gap:7px;
  width:64px;padding:12px 4px;border-radius:10px;
  color:var(--mist);
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.rail__link:hover{background:rgba(123,92,255,.16);color:var(--paper);transform:translateY(-2px)}
.rail__idx{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.08em;
  color:rgba(169,182,214,.6);
}
.rail__label{writing-mode:vertical-rl;font-size:13px;line-height:1;letter-spacing:.22em}
.rail__link[aria-current="page"]{
  color:var(--paper);
  background:linear-gradient(180deg,rgba(123,92,255,.30),rgba(123,92,255,.05));
}
.rail__link[aria-current="page"]::before{
  content:"";position:absolute;left:-12px;top:50%;transform:translateY(-50%);
  width:3px;height:38px;border-radius:3px;
  background:var(--violet);box-shadow:0 0 14px var(--violet);
}
.rail__link[aria-current="page"] .rail__idx{color:var(--gold)}

.rail__actions{
  display:flex;flex-direction:column;align-items:stretch;gap:8px;
  width:100%;padding:12px 10px;
  border-top:1px solid var(--track);
}
.rail__cta{
  display:flex;flex-direction:column;align-items:center;gap:1px;
  padding:10px 4px;border-radius:10px;
  font-family:var(--font-mono);font-size:11px;line-height:1.3;letter-spacing:.1em;
  text-align:center;
  transition:transform .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
}
.rail__cta--primary{
  background:linear-gradient(140deg,var(--violet),var(--violet-deep));
  color:#FFFFFF;
  box-shadow:0 10px 24px -12px rgba(123,92,255,.95);
}
.rail__cta--primary:hover{transform:translateY(-2px)}
.rail__cta--ghost{
  border:1px solid rgba(34,224,214,.45);
  color:var(--cyan);
  background:rgba(34,224,214,.06);
}
.rail__cta--ghost:hover{background:rgba(34,224,214,.15);transform:translateY(-2px)}

.rail__foot{
  display:flex;flex-direction:column;align-items:center;gap:7px;
  width:100%;padding-top:12px;border-top:1px solid var(--track);
}
.status-dot{
  width:8px;height:8px;border-radius:50%;flex:none;
  background:var(--green);
  box-shadow:0 0 0 4px rgba(59,217,138,.16);
  animation:statusPulse 3.8s ease-in-out infinite;
}
.rail__status{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;color:var(--mist);
}
@keyframes statusPulse{
  0%,100%{box-shadow:0 0 0 3px rgba(59,217,138,.16)}
  50%{box-shadow:0 0 0 8px rgba(59,217,138,.03)}
}

.header-scrim{display:none}

/* ---------- shared content primitives ---------- */
.wrap{
  width:100%;max-width:var(--maxw);margin:0 auto;
  padding-left:24px;padding-right:24px;
}
@media (min-width:900px){
  .wrap{padding-left:32px;padding-right:32px}
}
.stack>*+*{margin-top:clamp(14px,2vw,22px)}

.display{font-family:var(--font-display);color:var(--paper);line-height:.96;letter-spacing:-.02em}
.num-mega{
  font-family:var(--font-display);line-height:.82;letter-spacing:-.04em;
  font-size:clamp(64px,13vw,180px);color:var(--gold);
}
.eyebrow{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.26em;text-transform:uppercase;
  color:var(--cyan);
}
.lead{font-size:clamp(16px,1.4vw,19px);line-height:1.72;color:var(--mist);max-width:60ch}
.prose{max-width:68ch}
.prose p+p{margin-top:1.15em}
.prose--legal{font-size:17px;line-height:1.85}

.panel{
  position:relative;
  padding:clamp(20px,3vw,36px);
  background:linear-gradient(160deg,rgba(16,26,54,.96),rgba(10,17,45,.9));
  border:var(--edge);
  border-radius:var(--radius);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.panel:hover{transform:translateY(-4px);border-color:rgba(123,92,255,.62);box-shadow:var(--shadow-lift)}
.panel--tilt{transform:rotate(-1.2deg)}
.panel--tilt:hover{transform:rotate(-1.2deg) translateY(-4px)}

.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:14px;margin-bottom:22px;
}
.section-head__num{
  display:block;font-family:var(--font-mono);font-size:12px;letter-spacing:.24em;
  color:var(--gold);margin-bottom:8px;
}
.section-head__title{
  font-family:var(--font-display);letter-spacing:-.01em;line-height:1.05;
  font-size:clamp(24px,3.4vw,40px);color:var(--paper);
}

.grid--12{
  display:grid;grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2vw,24px);
}
.col-2{grid-column:span 2}
.col-3{grid-column:span 3}
.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-9{grid-column:span 9}
.col-12{grid-column:span 12}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:rgba(169,182,214,.75);margin-bottom:18px;
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:rgba(58,44,110,.95)}
.breadcrumb a{color:var(--mist);border-bottom:1px solid transparent;transition:color .18s ease,border-color .18s ease}
.breadcrumb a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--paper)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 22px;border-radius:999px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.12em;
  border:1px solid transparent;
  transition:transform .2s ease,background .2s ease,box-shadow .2s ease,color .2s ease,border-color .2s ease;
}
.btn--primary{
  background:linear-gradient(120deg,var(--violet),var(--violet-deep));
  color:#FFFFFF;
  box-shadow:0 12px 30px -14px rgba(123,92,255,.95);
}
.btn--primary:hover{transform:translateY(-2px)}
.btn--ghost{
  border-color:rgba(34,224,214,.5);
  background:rgba(34,224,214,.06);
  color:var(--cyan);
}
.btn--ghost:hover{background:rgba(34,224,214,.15);transform:translateY(-2px)}
.btn--gold{
  border-color:rgba(245,196,90,.55);
  background:rgba(245,196,90,.10);
  color:var(--gold);
}
.btn--gold:hover{background:rgba(245,196,90,.2);transform:translateY(-2px)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  padding:4px 10px;border-radius:999px;
  border:1px solid var(--track);
  background:rgba(16,26,54,.85);
  color:var(--mist);
}
.tag--cyan{color:var(--cyan);border-color:rgba(34,224,214,.45)}
.tag--gold{color:var(--gold);border-color:rgba(245,196,90,.45)}
.tag--green{color:var(--green);border-color:rgba(59,217,138,.45)}

.data-table{font-size:14px}
.data-table caption{
  text-align:left;font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  color:var(--cyan);padding-bottom:10px;
}
.data-table th{
  font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.14em;
  text-transform:uppercase;color:var(--cyan);text-align:left;
  padding:10px 12px;border-bottom:1px solid var(--track);white-space:nowrap;
}
.data-table td{
  padding:12px;color:var(--mist);
  border-bottom:1px solid rgba(58,44,110,.55);
  vertical-align:top;
}
.data-table tbody tr{transition:background .18s ease}
.data-table tbody tr:hover{background:rgba(123,92,255,.12)}
.data-table .num{font-family:var(--font-mono);color:var(--paper);white-space:nowrap}

.notice{
  padding:14px 18px;border-radius:0 12px 12px 0;
  border-left:3px solid var(--gold);
  background:rgba(245,196,90,.08);
  font-size:14px;color:var(--mist);
}

.paper-slab{
  background:var(--paper);
  color:#101A36;
  border-radius:var(--radius);
  padding:clamp(22px,4vw,48px);
}
.paper-slab a{color:#4C33C9;text-decoration:underline;text-underline-offset:3px}
.paper-slab .eyebrow{color:#7B5CFF}
.paper-slab .section-head__title{color:#101A36}
.paper-slab .prose--legal{color:#101A36}

/* image containers for page stage */
.media{
  position:relative;overflow:hidden;border-radius:12px;
  aspect-ratio:16/10;
  border:1px solid var(--track);
  background:
    radial-gradient(120% 120% at 18% 0%, rgba(123,92,255,.55), transparent 62%),
    radial-gradient(120% 120% at 92% 100%, rgba(34,224,214,.35), transparent 58%),
    var(--panel-2);
}
.media img{width:100%;height:100%;object-fit:cover}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(118deg,transparent 42%,rgba(34,224,214,.16) 52%,transparent 63%);
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media__caption{
  margin-top:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:rgba(169,182,214,.8);
}

/* reveal protocol */
.js-reveal [data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity .55s ease,transform .55s ease;
}
.js-reveal [data-reveal].is-in{opacity:1;transform:none}

/* ---------- footer ---------- */
.site-footer{
  position:relative;z-index:1;
  margin-top:clamp(48px,9vh,120px);
  overflow:hidden;
  background:linear-gradient(180deg,#070B1A 0%,#0A1028 44%,#0C1533 100%);
  border-top:1px solid var(--track);
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(58,44,110,.34) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(58,44,110,.34) 1px, transparent 1px);
  background-size:72px 72px;
  opacity:.6;
  -webkit-mask-image:linear-gradient(180deg,#000 0%,transparent 76%);
  mask-image:linear-gradient(180deg,#000 0%,transparent 76%);
}
.footer__glow{
  position:absolute;top:-220px;right:-140px;width:520px;height:520px;
  border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,rgba(123,92,255,.38),rgba(123,92,255,0) 68%);
  filter:blur(8px);
}
.footer__inner{
  position:relative;
  max-width:var(--maxw);margin:0 auto;
  padding:clamp(36px,6vw,72px) 24px 28px;
  display:flex;flex-direction:column;gap:clamp(26px,4vw,46px);
}
@media (min-width:900px){
  .footer__inner{padding-left:32px;padding-right:32px}
}

.footer__top{
  display:grid;grid-template-columns:1fr;gap:clamp(24px,4vw,48px);
}
.footer__brand{display:flex;flex-direction:column;gap:10px}
.footer__mark{
  width:38px;height:38px;display:grid;place-items:center;margin-bottom:4px;
  border-radius:11px;
  background:linear-gradient(150deg,var(--violet),var(--track) 78%);
  color:var(--paper);font-family:var(--font-display);font-size:20px;line-height:1;
  box-shadow:0 0 0 1px rgba(34,224,214,.35);
}
.footer__sigdisplay{
  font-family:var(--font-display);
  font-size:clamp(30px,4.6vw,54px);line-height:.95;letter-spacing:-.02em;
  color:var(--paper);
}
.footer__sub{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.22em;
  color:var(--cyan);
}
.footer__meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:6px}
.footer__metatext{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:rgba(169,182,214,.78);
}

.footer__cols{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:clamp(18px,3vw,32px);
}
.footer__coltitle{
  font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.24em;
  text-transform:uppercase;color:var(--cyan);
  margin-bottom:12px;
}
.footer__list{display:flex;flex-direction:column;gap:2px}
.footer__link{
  display:inline-block;
  font-size:15px;color:var(--mist);
  padding:4px 0;
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.footer__link:hover{color:var(--paper);border-bottom-color:var(--violet)}

.footer__contact{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:18px;
  padding-top:clamp(20px,3vw,32px);
  border-top:1px solid var(--track);
}
.footer__fact{display:flex;flex-direction:column;gap:4px}
.footer__factk{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  color:rgba(169,182,214,.68);
}
.footer__factv{
  font-family:var(--font-mono);font-size:14px;letter-spacing:.02em;
  color:var(--paper);word-break:break-word;
}
.footer__note{
  grid-column:1/-1;
  font-size:13px;line-height:1.7;color:rgba(169,182,214,.8);
  max-width:70ch;
}

.footer__base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  padding-top:20px;border-top:1px solid var(--track);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:rgba(169,182,214,.7);
}
.footer__legal{color:var(--gold)}
.footer__copy{color:rgba(169,182,214,.7)}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;border-radius:999px;
  border:1px solid var(--track);
  background:rgba(123,92,255,.12);
  color:var(--paper);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  transition:transform .2s ease,border-color .2s ease,background .2s ease;
}
.to-top:hover{transform:translateY(-2px);border-color:var(--violet);background:rgba(123,92,255,.24)}

/* ---------- tablet ---------- */
@media (max-width:1023px){
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-2{grid-column:span 2}
  .col-3,.col-4,.col-5,.col-6{grid-column:span 3}
  .col-7,.col-8,.col-9{grid-column:span 6}
  .footer__top{grid-template-columns:1fr}
}

/* ---------- mobile ---------- */
@media (max-width:899px){
  body{padding-left:0}
  .mobilebar{
    display:flex;align-items:center;gap:12px;
    padding:10px 16px;
    position:sticky;top:var(--topbar-h);z-index:25;
    background:rgba(12,21,51,.96);
    border-bottom:1px solid var(--track);
    -webkit-backdrop-filter:blur(8px);
    backdrop-filter:blur(8px);
  }
  .mobilebar__brand{
    display:flex;flex-direction:column;gap:2px;
    font-family:var(--font-display);font-size:18px;line-height:1.1;letter-spacing:-.01em;
    color:var(--paper);
  }
  .mobilebar__sub{
    font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;color:var(--cyan);
  }
  .nav-toggle{
    margin-left:auto;
    display:inline-flex;align-items:center;gap:9px;
    padding:9px 13px;border-radius:10px;
    border:1px solid rgba(123,92,255,.55);
    background:rgba(123,92,255,.16);
    color:var(--paper);
    font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  }
  .nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:16px;flex:none}
  .nav-toggle__bars span{display:block;height:2px;width:100%;background:currentColor;border-radius:2px;transition:transform .2s ease,opacity .2s ease}
  .site-header[data-open] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .site-header[data-open] .nav-toggle__bars span:nth-child(2){opacity:0}
  .site-header[data-open] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

  .rail{
    top:0;bottom:0;width:min(320px,84vw);
    align-items:stretch;gap:0;
    padding:0 0 12px;
    transform:translateX(-104%);
    transition:transform .26s ease;
    box-shadow:28px 0 70px rgba(0,0,0,.6);
    z-index:40;
  }
  .site-header[data-open] .rail{transform:translateX(0)}
  .rail__close{
    display:grid;place-items:center;
    position:absolute;top:12px;right:12px;
    width:36px;height:36px;border-radius:10px;
    border:1px solid var(--track);
    background:rgba(16,26,54,.9);
    color:var(--paper);font-size:14px;line-height:1;
  }
  .rail__brand{
    flex-direction:row;align-items:center;justify-content:flex-start;gap:10px;
    padding:16px 18px;border-bottom:1px solid var(--track);
  }
  .rail__mark{width:34px;height:34px;font-size:18px;border-radius:10px}
  .rail__name{
    writing-mode:horizontal-tb;
    font-size:12px;letter-spacing:.2em;color:var(--paper);
  }
  .rail__nav{flex:1 1 auto;padding:8px 10px}
  .rail__list{align-items:stretch;gap:2px}
  .rail__item{justify-content:stretch}
  .rail__link{
    width:auto;flex-direction:row;align-items:center;justify-content:flex-start;
    gap:14px;padding:13px 14px;border-radius:10px;
  }
  .rail__idx{font-size:11px;min-width:22px;color:var(--gold)}
  .rail__label{writing-mode:horizontal-tb;font-size:15px;letter-spacing:.08em}
  .rail__link[aria-current="page"]::before{
    left:0;top:50%;transform:translateY(-50%);
    width:3px;height:22px;
  }
  .rail__actions{
    flex-direction:row;align-items:stretch;gap:8px;
    padding:12px 14px;
  }
  .rail__cta{
    flex:1 1 0;flex-direction:row;justify-content:center;gap:6px;
    padding:12px 8px;font-size:12px;
  }
  .rail__foot{
    flex-direction:row;align-items:center;justify-content:flex-start;gap:10px;
    padding:12px 18px 0;border-top:1px solid var(--track);
  }
  .rail__status{writing-mode:horizontal-tb;font-size:11px;letter-spacing:.14em}

  .header-scrim{
    display:block;
    position:fixed;inset:0;z-index:35;
    background:rgba(4,7,18,.68);
    -webkit-backdrop-filter:blur(2px);
    backdrop-filter:blur(2px);
    opacity:0;pointer-events:none;
    transition:opacity .24s ease;
  }
  .site-header[data-open] .header-scrim{opacity:1;pointer-events:auto}
  .nav-open{overflow:hidden}
}

/* ---------- small mobile ---------- */
@media (max-width:639px){
  .grid--12{grid-template-columns:repeat(2,minmax(0,1fr))}
  .col-2,.col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9,.col-12{grid-column:span 2}
  .topbar__inner{padding:0 12px;gap:10px}
  .topbar__brand-line{font-size:11px;letter-spacing:.1em}
  .topbar__tagline{display:none}
  .topbar__util{display:none}
  .topbar__tail{gap:10px}
  .footer__base{font-size:11px}
  .to-top{width:100%;justify-content:center}
}
@media (min-width:640px) and (max-width:1099px){
  .topbar__tagline{display:none}
}

/* ---------- wide desktop spacing ---------- */
@media (min-width:900px){
  body{padding-left:var(--rail-w)}
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .js-reveal [data-reveal]{opacity:1;transform:none;transition:none}
  .panel:hover,.rail__link:hover,.rail__cta:hover,.btn:hover,.to-top:hover{transform:none}
  .panel--tilt,.panel--tilt:hover{transform:rotate(-1.2deg)}
}