/* ============================================================
   7娱乐会馆 · /assets/site.css
   共享外壳：深墨绿会馆后台 / 88px 侧边轨道 / 控制台式页脚
   ============================================================ */

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

/* ---------- 2. Tokens ---------- */
:root{
  --ink:#081F1A;
  --ink-2:#0E2F27;
  --line:#1C4A3F;
  --cyan:#38F2CF;
  --orange:#FF8A3D;
  --gold:#D9B36C;
  --text:#D8E9E2;
  --white:#F5FAF7;
  --indigo:#3B2F5C;
  --wine:#5B2738;

  --rail:88px;
  --bar:64px;
  --gutter:clamp(18px,4.2vw,48px);
  --maxw:1280px;

  --r-xl:32px;
  --r-lg:24px;
  --r-md:16px;
  --r-pill:999px;

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"Barlow Condensed","DIN Condensed","Oswald","HarmonyOS Sans SC","PingFang SC",system-ui,sans-serif;

  --ease:cubic-bezier(.2,.8,.2,1);
  --shadow:0 26px 64px -34px rgba(0,0,0,.95);
  --hair:1px solid rgba(28,74,63,.9);
}

/* ---------- 3. Base ---------- */
body{
  padding-top:var(--bar);
  min-height:100vh;
  color:var(--text);
  font-family:var(--font-sans);
  font-size:clamp(16px,1.05vw,17px);
  font-weight:400;
  line-height:1.75;
  letter-spacing:.012em;
  background-color:var(--ink);
  background-image:
    radial-gradient(120% 80% at 104% -8%, rgba(255,138,61,.16), transparent 58%),
    radial-gradient(90% 70% at -8% 14%, rgba(56,242,207,.13), transparent 62%),
    radial-gradient(80% 60% at 70% 108%, rgba(59,47,92,.5), transparent 60%),
    repeating-linear-gradient(0deg, rgba(56,242,207,.055) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(90deg, rgba(56,242,207,.055) 0 1px, transparent 1px 64px);
  background-attachment:fixed;
}
h1,h2,h3,h4{line-height:1.2;letter-spacing:.08em;color:var(--white);font-weight:800}
h1{font-size:clamp(36px,4.6vw,72px)}
h2{font-size:clamp(26px,3.4vw,44px)}
h3{font-size:clamp(20px,1.8vw,26px)}
p{max-width:68ch}
strong{color:var(--white);font-weight:700}
a{transition:color .25s var(--ease)}
[id]{scroll-margin-top:calc(var(--bar) + 24px)}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

/* ---------- 4. Utilities ---------- */
.visually-hidden{
  position:absolute !important;width:1px;height:1px;
  padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);
  white-space:nowrap;border:0;
}
.skip-link{
  position:fixed;top:10px;left:10px;z-index:300;
  padding:12px 22px;border-radius:var(--r-pill);
  background:var(--cyan);color:#04231D;
  font-size:14px;font-weight:700;letter-spacing:.1em;
  transform:translateY(-180%);
  transition:transform .25s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:none}

/* ---------- 5. Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  height:var(--bar);
  display:flex;align-items:center;gap:12px;
  padding:10px 16px;
  background:linear-gradient(180deg,rgba(14,47,39,.98),rgba(6,24,20,.98));
  border-bottom:1px solid rgba(28,74,63,.95);
  box-shadow:0 18px 40px -30px #000;
}
.rail-brand{min-width:0}
.brand{display:flex;align-items:center;gap:10px;color:var(--white)}
.brand-mark{
  position:relative;flex:0 0 auto;
  width:40px;height:40px;border-radius:14px;
  display:grid;place-items:center;
  background:radial-gradient(circle at 30% 18%, rgba(56,242,207,.4), rgba(14,47,39,.95) 72%);
  border:1px solid rgba(217,179,108,.6);
  box-shadow:0 0 0 4px rgba(56,242,207,.07), inset 0 0 18px rgba(56,242,207,.22);
  overflow:hidden;
}
.brand-mark::after{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(0deg, rgba(56,242,207,.18) 0 1px, transparent 1px 4px);
  opacity:.5;
}
.brand-digit{
  position:relative;z-index:1;
  font-family:var(--font-num);font-size:24px;font-weight:700;line-height:1;
  color:var(--white);
  text-shadow:0 0 16px rgba(56,242,207,.7);
}
.brand-copy{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand-name{font-size:15px;font-weight:800;letter-spacing:.14em;line-height:1.2;color:var(--white)}
.brand-line{font-size:10.5px;letter-spacing:.14em;line-height:1.3;color:rgba(217,179,108,.9)}

.nav-toggle{
  position:relative;z-index:95;margin-left:auto;
  display:inline-flex;align-items:center;gap:10px;
  padding:9px 16px;border-radius:var(--r-pill);
  border:1px solid rgba(56,242,207,.4);
  background:rgba(56,242,207,.08);
  color:var(--white);
  font-size:12px;letter-spacing:.16em;
  transition:background .25s var(--ease),border-color .25s var(--ease);
}
.nav-toggle:hover{background:rgba(56,242,207,.16);border-color:var(--cyan)}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle-bars span{
  display:block;height:2px;border-radius:2px;background:var(--cyan);
  transition:transform .3s var(--ease),opacity .2s var(--ease);
}
.site-header[data-open] .nav-toggle-bars span:first-child{transform:translateY(3px) rotate(45deg)}
.site-header[data-open] .nav-toggle-bars span:last-child{transform:translateY(-3px) rotate(-45deg)}

.rail-nav{
  position:fixed;top:0;left:0;bottom:0;z-index:90;
  width:min(86vw,340px);
  display:flex;flex-direction:column;gap:18px;
  padding:76px 20px 26px;
  background:
    radial-gradient(90% 60% at 10% 0%, rgba(59,47,92,.65), transparent 60%),
    linear-gradient(165deg,#0E2F27,#061815);
  border-right:1px solid var(--line);
  box-shadow:24px 0 60px -30px #000;
  transform:translateX(-102%);
  transition:transform .42s var(--ease);
  overflow-y:auto;
  overscroll-behavior:contain;
}
.site-header[data-open] .rail-nav{transform:translateX(0)}

.rail-list{display:flex;flex-direction:column;gap:2px}
.rail-link{
  position:relative;
  display:flex;align-items:baseline;gap:12px;
  padding:13px 14px 13px 18px;
  border-radius:14px;
  color:var(--text);
  font-size:15px;letter-spacing:.08em;line-height:1.4;
  border-bottom:1px solid rgba(28,74,63,.55);
  transition:color .25s var(--ease),background .25s var(--ease);
}
.rail-link::before{
  content:"";position:absolute;left:0;top:50%;
  width:3px;height:18px;border-radius:2px;
  background:var(--cyan);
  transform:translateY(-50%);
  opacity:0;
  transition:opacity .25s var(--ease);
}
.rail-link:hover{color:var(--white);background:rgba(56,242,207,.08)}
.rail-link[aria-current="page"]{
  color:var(--white);
  background:linear-gradient(90deg,rgba(56,242,207,.18),rgba(56,242,207,.02));
  box-shadow:inset 0 0 0 1px rgba(56,242,207,.28);
}
.rail-link[aria-current="page"]::before{opacity:1}
.rail-index{
  font-family:var(--font-num);
  font-size:10px;letter-spacing:.22em;
  color:rgba(216,233,226,.45);
}
.rail-link[aria-current="page"] .rail-index{color:var(--cyan)}
.rail-label{font-weight:700}

.rail-actions{display:flex;flex-direction:column;gap:10px;margin-top:auto;padding-top:6px}
.rail-hint{
  font-size:11px;letter-spacing:.16em;line-height:1.6;
  color:rgba(216,233,226,.42);
  border-top:1px solid rgba(28,74,63,.6);
  padding-top:12px;
}

.nav-scrim{
  position:fixed;inset:0;z-index:85;
  background:rgba(3,15,12,.74);
  opacity:0;pointer-events:none;
  transition:opacity .32s var(--ease);
}
.site-header[data-open] .nav-scrim{opacity:1;pointer-events:auto}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:rgba(28,74,63,.7);
  overflow:hidden;
}
.scroll-progress-bar{
  display:block;width:100%;height:100%;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transform:scaleX(var(--p,0));
  transform-origin:0 50%;
}

/* ---------- 6. Footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,110px);
  padding:clamp(34px,5vw,68px) var(--gutter) 26px;
  background:
    radial-gradient(90% 120% at 90% 0%, rgba(59,47,92,.55), transparent 62%),
    radial-gradient(70% 90% at 4% 100%, rgba(91,39,56,.4), transparent 62%),
    linear-gradient(180deg,#0E2F27,#061815);
  border-top:1px solid rgba(217,179,108,.3);
  border-top-left-radius:var(--r-xl);
  border-top-right-radius:var(--r-xl);
  overflow:hidden;
}
.site-footer::after{
  content:"7";
  position:absolute;right:-1%;bottom:-16%;z-index:0;
  font-family:var(--font-num);font-weight:700;line-height:.72;
  font-size:clamp(180px,34vw,440px);
  color:transparent;
  -webkit-text-stroke:1px rgba(56,242,207,.15);
  pointer-events:none;
  user-select:none;
}
.footer-shell{
  position:relative;z-index:1;
  display:grid;gap:clamp(26px,4vw,52px);
  grid-template-columns:1fr;
  max-width:var(--maxw);margin-inline:auto;
}
.footer-intro{display:flex;flex-direction:column;gap:12px}
.footer-kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-num);
  font-size:11.5px;letter-spacing:.32em;
  color:var(--gold);
}
.footer-kicker::before{content:"";width:26px;height:1px;background:currentColor;opacity:.7}
.footer-title{font-size:clamp(24px,2.8vw,36px);letter-spacing:.1em;color:var(--white)}
.footer-summary{font-size:14.5px;line-height:1.8;color:rgba(216,233,226,.78);max-width:42ch}

.footer-nav{display:grid;gap:22px;grid-template-columns:repeat(2,minmax(0,1fr))}
.footer-col{display:flex;flex-direction:column;gap:12px}
.footer-col-title{
  font-size:12px;letter-spacing:.26em;font-weight:700;
  color:rgba(216,233,226,.55);
  text-transform:uppercase;
}
.footer-links{display:flex;flex-direction:column;gap:9px}
.footer-links a{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14.5px;color:rgba(216,233,226,.82);
  padding:2px 0;
}
.footer-links a::before{
  content:"";width:6px;height:6px;border-radius:50%;
  border:1px solid rgba(56,242,207,.55);
  transition:background .25s var(--ease),border-color .25s var(--ease);
}
.footer-links a:hover{color:var(--white)}
.footer-links a:hover::before{background:var(--cyan);border-color:var(--cyan)}
.footer-links a[aria-current="page"]{color:var(--cyan)}
.footer-links a[aria-current="page"]::before{background:var(--cyan);border-color:var(--cyan)}

.footer-contact{display:flex;flex-direction:column;gap:14px}
.footer-contact-list{display:flex;flex-direction:column;gap:14px}
.footer-contact-row{display:flex;flex-direction:column;gap:3px}
.footer-contact-row dt{
  font-family:var(--font-num);
  font-size:11px;letter-spacing:.24em;
  color:rgba(216,233,226,.45);
}
.footer-contact-row dd{font-size:14.5px;line-height:1.7;color:var(--white)}
.footer-note{
  font-size:12.5px;line-height:1.7;
  color:rgba(216,233,226,.5);
  border-left:2px solid rgba(217,179,108,.45);
  padding-left:12px;
}

.copy-btn{
  display:inline-flex;align-items:center;gap:10px;flex-wrap:wrap;
  padding:7px 14px;border-radius:var(--r-pill);
  border:1px dashed rgba(56,242,207,.45);
  background:rgba(56,242,207,.07);
  color:var(--white);
  font-family:var(--font-num);
  font-size:15px;letter-spacing:.02em;
  transition:border-color .25s var(--ease),background .25s var(--ease);
}
.copy-btn:hover{border-color:var(--cyan);background:rgba(56,242,207,.14)}
.copy-btn-hint{
  font-family:var(--font-sans);
  font-size:10.5px;letter-spacing:.18em;
  color:var(--orange);
  border-left:1px solid rgba(255,138,61,.4);
  padding-left:10px;
}

.footer-base{
  position:relative;z-index:1;
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 22px;
  max-width:var(--maxw);margin:clamp(28px,4vw,48px) auto 0;
  padding-top:20px;
  border-top:1px solid rgba(28,74,63,.9);
  font-size:12.5px;letter-spacing:.06em;
  color:rgba(216,233,226,.62);
}
.footer-legal{font-family:var(--font-num);font-size:13px;letter-spacing:.12em;color:rgba(216,233,226,.7)}
.footer-copy{color:rgba(216,233,226,.5)}
.legal-links{display:flex;flex-wrap:wrap;gap:8px 18px}
.legal-links a{color:rgba(216,233,226,.62)}
.legal-links a:hover{color:var(--cyan)}

.to-top{
  position:fixed;right:18px;bottom:18px;z-index:70;
  display:inline-flex;align-items:center;gap:9px;
  padding:12px 18px;border-radius:var(--r-pill);
  border:1px solid rgba(56,242,207,.42);
  background:rgba(8,31,26,.94);
  color:var(--white);
  font-size:12.5px;letter-spacing:.14em;
  opacity:0;transform:translateY(16px);pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease),background .25s var(--ease);
  box-shadow:var(--shadow);
}
.to-top::before{
  content:"↑";
  font-family:var(--font-num);font-size:16px;line-height:1;
  color:var(--cyan);
}
.to-top[data-visible]{opacity:1;transform:none;pointer-events:auto}
.to-top:hover{background:rgba(56,242,207,.16)}

/* ---------- 7. Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:14px;font-weight:700;letter-spacing:.1em;line-height:1.35;
  text-align:center;
  transition:transform .25s var(--ease),background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn--primary{
  background:linear-gradient(120deg,var(--cyan),#25D7B2);
  color:#04231D;
  box-shadow:0 16px 34px -18px rgba(56,242,207,.85);
}
.btn--ghost{
  border-color:rgba(56,242,207,.42);
  background:rgba(56,242,207,.07);
  color:var(--white);
}
.btn--ghost:hover{background:rgba(56,242,207,.16);border-color:var(--cyan)}
.btn--orange{
  background:linear-gradient(120deg,var(--orange),#F26A18);
  color:#2A1103;
  box-shadow:0 16px 34px -18px rgba(255,138,61,.8);
}
.btn--rail{
  width:100%;
  padding:10px 6px;
  border-radius:14px;
  font-size:12px;letter-spacing:.08em;
  min-height:42px;
}

/* ---------- 8. Layout ---------- */
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.container--narrow{max-width:820px}
.section{padding-block:clamp(48px,7vw,96px)}
.grid{display:grid;gap:clamp(16px,2vw,28px)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-12{grid-column:span 12}

/* ---------- 9. Type components ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-num);
  font-size:12px;letter-spacing:.34em;text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{content:"";width:28px;height:1px;background:currentColor;opacity:.75}
.section-title{font-size:clamp(26px,3.6vw,44px);letter-spacing:.08em;color:var(--white)}
.lead{font-size:clamp(16.5px,1.35vw,19px);line-height:1.8;color:var(--text);max-width:40em}
.note-text{font-size:14px;line-height:1.75;color:rgba(216,233,226,.7);max-width:52ch}

/* ---------- 10. Cards / pills / stats ---------- */
.card{
  position:relative;display:flex;flex-direction:column;gap:12px;
  padding:clamp(20px,2.4vw,30px);
  border-radius:var(--r-lg);
  border:1px solid rgba(28,74,63,.95);
  background:linear-gradient(160deg,rgba(14,47,39,.95),rgba(8,31,26,.9));
  box-shadow:var(--shadow);
  overflow:hidden;
}
.card::before{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
  background-image:repeating-linear-gradient(112deg,rgba(56,242,207,.07) 0 1px,transparent 1px 22px);
}
.card > *{position:relative;z-index:1}
.card__label{
  font-family:var(--font-num);
  font-size:11.5px;letter-spacing:.28em;text-transform:uppercase;
  color:var(--gold);
}
.card__title{font-size:clamp(19px,1.6vw,24px);letter-spacing:.06em;color:var(--white)}

.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--r-pill);
  border:1px solid rgba(56,242,207,.36);
  background:rgba(56,242,207,.1);
  color:var(--cyan);
  font-size:12.5px;letter-spacing:.1em;line-height:1.5;
}
.pill--orange{border-color:rgba(255,138,61,.42);background:rgba(255,138,61,.12);color:var(--orange)}
.pill--gold{border-color:rgba(217,179,108,.45);background:rgba(217,179,108,.12);color:var(--gold)}

.stat{display:flex;flex-direction:column;gap:4px}
.stat__value{
  font-family:var(--font-num);
  font-size:clamp(30px,3.4vw,46px);
  font-weight:700;line-height:1;letter-spacing:.02em;
  color:var(--cyan);
  font-variant-numeric:tabular-nums;
}
.stat__label{font-size:12.5px;letter-spacing:.12em;color:rgba(216,233,226,.7)}

/* ---------- 11. Breadcrumbs / TOC ---------- */
.breadcrumbs{padding-block:18px;font-size:13px;color:rgba(216,233,226,.6)}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none;margin:0;padding:0}
.breadcrumbs li{display:flex;align-items:center;gap:8px}
.breadcrumbs li + li::before{content:"/";color:rgba(56,242,207,.5)}
.breadcrumbs a:hover{color:var(--cyan)}
.breadcrumbs [aria-current="page"]{color:var(--text)}

.toc{
  position:sticky;top:calc(var(--bar) + 18px);
  display:flex;flex-direction:column;gap:3px;
  padding:18px 16px;
  border-radius:var(--r-lg);
  border:1px solid rgba(28,74,63,.85);
  background:rgba(14,47,39,.66);
}
.toc-title{
  font-family:var(--font-num);
  font-size:11px;letter-spacing:.3em;text-transform:uppercase;
  color:var(--gold);
  margin-bottom:8px;
}
.toc-link{
  display:block;
  padding:8px 10px;
  border-radius:10px;
  border-left:2px solid transparent;
  font-size:13.5px;line-height:1.5;
  color:rgba(216,233,226,.72);
  transition:color .25s var(--ease),background .25s var(--ease),border-color .25s var(--ease);
}
.toc-link:hover{color:var(--white);background:rgba(56,242,207,.08)}
.toc-link[aria-current="true"]{
  color:var(--cyan);
  border-left-color:var(--cyan);
  background:rgba(56,242,207,.1);
}

/* ---------- 12. Media ---------- */
.media{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-xl);
  border:1px solid rgba(28,74,63,.95);
  background:linear-gradient(150deg,#0E2F27,#081F1A);
  aspect-ratio:4 / 3;
  box-shadow:var(--shadow);
}
.media img{width:100%;height:100%;object-fit:cover}
.media::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    repeating-linear-gradient(0deg, rgba(56,242,207,.1) 0 1px, transparent 1px 4px),
    linear-gradient(180deg, transparent 0%, rgba(56,242,207,.18) 45%, transparent 62%);
  background-size:100% 4px, 100% 220%;
  background-repeat:repeat, no-repeat;
  background-position:0 0, 0 -140%;
  opacity:.55;
  animation:media-scan 12s linear infinite;
}
.media--wide{aspect-ratio:16 / 9}
.media--tall{aspect-ratio:3 / 4}
.media--tilt{transform:rotate(-3deg);transform-origin:50% 80%}
.media__caption{
  position:absolute;left:16px;bottom:16px;z-index:2;
  padding:7px 14px;border-radius:var(--r-pill);
  background:rgba(6,24,20,.8);
  border:1px solid rgba(56,242,207,.3);
  color:var(--text);
  font-size:12px;letter-spacing:.1em;
}
@keyframes media-scan{
  0%{background-position:0 0, 0 -140%}
  100%{background-position:0 0, 0 250%}
}

/* ---------- 13. Tabs / Filter ---------- */
.tabs{
  display:flex;flex-wrap:wrap;gap:6px;
  padding:6px;border-radius:var(--r-pill);
  border:1px solid rgba(28,74,63,.95);
  background:rgba(14,47,39,.66);
  width:fit-content;max-width:100%;
}
.tab{
  padding:9px 18px;border-radius:var(--r-pill);
  font-size:13.5px;letter-spacing:.08em;
  color:rgba(216,233,226,.75);
  transition:background .25s var(--ease),color .25s var(--ease),box-shadow .25s var(--ease);
}
.tab:hover{color:var(--white);background:rgba(56,242,207,.08)}
.tab[aria-selected="true"]{
  color:var(--cyan);
  background:rgba(56,242,207,.16);
  box-shadow:inset 0 0 0 1px rgba(56,242,207,.45);
}
.tab-panel{padding-top:22px}
.tab-panel[hidden]{display:none}

.filter-bar{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.filter-chip{
  padding:8px 16px;border-radius:var(--r-pill);
  border:1px solid rgba(28,74,63,.95);
  font-size:13px;letter-spacing:.08em;
  color:rgba(216,233,226,.75);
  transition:color .25s var(--ease),border-color .25s var(--ease),background .25s var(--ease);
}
.filter-chip:hover{color:var(--white);border-color:rgba(56,242,207,.5)}
.filter-chip[aria-pressed="true"]{
  border-color:rgba(255,138,61,.55);
  background:rgba(255,138,61,.14);
  color:var(--orange);
}
.filter-item[hidden]{display:none}
.filter-empty{
  padding:18px 0;
  font-size:14px;
  color:rgba(216,233,226,.6);
}

/* ---------- 14. Reveal ---------- */
.is-reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
}
.is-reveal.is-in{opacity:1;transform:none}

/* ---------- 15. Responsive ---------- */
@media (min-width:620px){
  .footer-shell{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-intro{grid-column:1 / -1}
}
@media (min-width:760px){
  .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-12{grid-column:span 12}
}
@media (min-width:960px){
  :root{--bar:0px}
  body{padding-top:0;padding-left:var(--rail)}

  .site-header{
    top:0;right:auto;bottom:0;left:0;
    width:var(--rail);height:100vh;height:100dvh;
    flex-direction:column;align-items:stretch;gap:16px;
    padding:18px 12px 22px;
    border-right:1px solid rgba(28,74,63,.95);
    border-bottom:0;
    box-shadow:16px 0 48px -34px #000;
  }
  .rail-brand{
    display:flex;justify-content:center;
    padding-bottom:14px;
    border-bottom:1px solid rgba(28,74,63,.75);
  }
  .brand{flex-direction:column;gap:8px;text-align:center}
  .brand-mark{width:44px;height:44px;border-radius:15px}
  .brand-digit{font-size:26px}
  .brand-copy{align-items:center;text-align:center}
  .brand-name{font-size:10.5px;letter-spacing:.04em}
  .brand-line{font-size:9px;letter-spacing:0;opacity:.72;line-height:1.35;max-width:70px}

  .nav-toggle{display:none}
  .nav-scrim{display:none}
  .rail-hint{display:none}

  .rail-nav{
    position:static;transform:none;
    width:auto;height:auto;flex:1;min-height:0;
    padding:0;
    background:none;border:0;box-shadow:none;
    overflow-y:auto;overflow-x:hidden;
    scrollbar-width:thin;
    gap:12px;
  }
  .rail-list{gap:4px}
  .rail-link{
    flex-direction:column;align-items:center;gap:2px;
    padding:9px 4px;
    font-size:11px;letter-spacing:.06em;line-height:1.3;
    border-radius:14px;
    border-bottom:0;
    text-align:center;
  }
  .rail-link::before{left:-6px;height:20px;width:3px}
  .rail-index{font-size:9px;letter-spacing:.16em}
  .rail-label{font-weight:700}

  .rail-actions{gap:8px;padding-top:12px;border-top:1px solid rgba(28,74,63,.7)}
  .btn--rail{
    min-height:0;
    padding:9px 4px;
    font-size:10.5px;letter-spacing:.06em;
    border-radius:12px;
  }

  .scroll-progress{
    left:auto;right:-1px;top:0;bottom:0;
    width:2px;height:auto;
  }
  .scroll-progress-bar{
    background:linear-gradient(180deg,var(--cyan),var(--orange));
    transform:scaleY(var(--p,0));
    transform-origin:50% 0;
  }

  .footer-shell{grid-template-columns:1.25fr .85fr 1.1fr;align-items:start}
  .footer-intro{grid-column:auto}
  .to-top{right:26px;bottom:26px}
}
@media (min-width:1180px){
  .to-top{padding:13px 22px}
}

/* ---------- 16. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .media::after{animation:none;opacity:.35}
  .is-reveal{opacity:1;transform:none}
  .btn:hover,.to-top{transform:none}
}