*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,figcaption,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%}

:root{
  --ink:#0B0B0F;
  --ink-2:#1A1B20;
  --ink-3:#101117;
  --gold:#D6A84B;
  --gold-soft:#F2D38C;
  --paper:#F4EFE6;
  --rock:#8C8B86;
  --violet:#8B5CF6;
  --blue:#3DBBFF;
  --coral:#FF6B4A;
  --moss:#6F7F5E;

  --text:rgba(244,239,230,.88);
  --text-dim:rgba(244,239,230,.62);
  --text-mute:rgba(244,239,230,.44);
  --line-gold:rgba(214,168,75,.26);
  --line-soft:rgba(244,239,230,.10);

  --font-display:"Noto Sans SC","HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-serif:"Noto Serif SC","Songti SC","Times New Roman",serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;

  --fs-12:12px;
  --fs-14:14px;
  --fs-16:16px;
  --fs-18:18px;
  --fs-20:20px;
  --fs-28:28px;
  --fs-40:40px;
  --fs-64:64px;
  --fs-96:96px;

  --gutter:clamp(1.15rem,4vw,3.25rem);
  --radius:3px;
  --shadow-soft:0 24px 60px -44px rgba(0,0,0,.95),inset 0 1px 0 rgba(244,239,230,.04);
  --ease:cubic-bezier(.22,.61,.36,1);
}

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

body{
  font-family:var(--font-body);
  font-size:var(--fs-16);
  line-height:1.8;
  letter-spacing:.012em;
  color:var(--text);
  background-color:var(--ink);
  background-image:
    radial-gradient(58rem 40rem at 84% -12%,rgba(139,92,246,.16),transparent 62%),
    radial-gradient(46rem 34rem at 4% 2%,rgba(61,187,255,.10),transparent 64%),
    radial-gradient(70rem 46rem at 50% 118%,rgba(214,168,75,.12),transparent 62%);
  background-attachment:fixed;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.25;letter-spacing:.02em;color:var(--paper)}
strong{font-weight:700;color:var(--paper)}
#main-content{display:block}
#main-content:focus{outline:none}

/* ---------- 布局基元 ---------- */
.frame{width:min(1320px,calc(100% - var(--gutter)*2));margin-inline:auto}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(1rem,2.4vw,2.2rem)}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-12{grid-column:span 12}
.stack{display:grid;gap:clamp(.8rem,1.6vw,1.4rem)}
.prose{max-width:68ch;font-size:var(--fs-16);line-height:1.9;color:var(--text)}
.prose p+p{margin-top:1em}

.eyebrow{display:inline-flex;align-items:center;gap:.6rem;font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;color:var(--gold);text-transform:uppercase}
.eyebrow::before{content:"";width:1.6rem;height:1px;background:linear-gradient(90deg,var(--gold),rgba(214,168,75,0))}

.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:.8rem 1.4rem;padding-bottom:.85rem;border-bottom:1px solid var(--line-gold);margin-bottom:clamp(1.4rem,3vw,2.4rem)}
.section-head__title{font-family:var(--font-serif);font-size:clamp(1.3rem,2.6vw,2rem);font-weight:700;letter-spacing:.06em}
.section-head__note{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--text-mute)}

.rule-gold{height:1px;border:0;background:linear-gradient(90deg,rgba(214,168,75,.7),rgba(214,168,75,0));margin-block:clamp(1.5rem,3vw,2.5rem)}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.metal-text{background:linear-gradient(102deg,#F2D38C 0%,#D6A84B 42%,#f8e8c0 62%,#b98c33 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;padding-right:.06em}

/* ---------- 按钮 ---------- */
.btn{
  --btn-bg:transparent;
  --btn-fg:var(--paper);
  --btn-line:var(--line-gold);
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.66rem 1.15rem;
  font-family:var(--font-display);
  font-size:var(--fs-14);font-weight:700;letter-spacing:.12em;
  color:var(--btn-fg);background:var(--btn-bg);
  border:1px solid var(--btn-line);border-radius:var(--radius);
  transition:color .22s var(--ease),border-color .22s var(--ease),background-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn:hover{border-color:var(--gold);color:var(--gold-soft);transform:translateY(-1px);box-shadow:0 12px 28px -20px rgba(214,168,75,.9)}
.btn:active{transform:translateY(0)}
.btn--gold{--btn-bg:linear-gradient(100deg,#F2D38C,#D6A84B 58%,#b8892f);--btn-fg:#12100a;--btn-line:rgba(242,211,140,.62);font-weight:800}
.btn--gold:hover{color:#0b0a06;border-color:var(--gold-soft);box-shadow:0 14px 34px -18px rgba(214,168,75,.85)}
.btn--ghost{--btn-bg:rgba(244,239,230,.03);--btn-fg:var(--paper);--btn-line:var(--line-soft)}
.btn--ghost:hover{--btn-fg:var(--gold-soft);background:rgba(214,168,75,.08);border-color:var(--line-gold)}
.btn--sm{padding:.4rem .78rem;font-size:var(--fs-12);letter-spacing:.14em}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;left:var(--gutter);top:-120px;z-index:200;
  padding:.7rem 1.1rem;
  font-family:var(--font-display);font-size:var(--fs-14);font-weight:800;letter-spacing:.1em;
  color:#0b0a06;background:var(--gold-soft);border-radius:var(--radius);
  transition:top .18s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{top:.6rem;color:#0b0a06}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:linear-gradient(180deg,rgba(11,11,15,.97),rgba(11,11,15,.86));
  -webkit-backdrop-filter:blur(16px) saturate(130%);
  backdrop-filter:blur(16px) saturate(130%);
  transition:background-color .25s var(--ease);
}
.site-header__frame{width:min(1320px,calc(100% - var(--gutter)*2));margin-inline:auto}
.site-header__upper{
  display:flex;align-items:center;justify-content:space-between;gap:1.1rem;
  padding-block:clamp(.55rem,1.2vw,.95rem);
  border-bottom:1px solid var(--line-soft);
  transition:padding-block .25s var(--ease);
}
.site-header.is-compact .site-header__upper{padding-block:.34rem}

.brand{display:flex;align-items:center;gap:.85rem;min-width:0}
.brand__link{display:inline-flex;align-items:center;gap:.7rem;min-width:0}
.brand__mark{
  position:relative;display:grid;place-items:center;flex:none;
  width:2.35rem;height:2.35rem;
  font-family:var(--font-mono);font-size:.68rem;font-weight:600;letter-spacing:.1em;
  color:var(--gold-soft);
  background:linear-gradient(145deg,rgba(214,168,75,.22),rgba(139,92,246,.18) 55%,rgba(61,187,255,.14));
  border:1px solid var(--line-gold);
  box-shadow:inset 0 0 18px -8px rgba(242,211,140,.85);
}
.brand__mark::after{content:"";position:absolute;inset:3px;border:1px solid rgba(242,211,140,.18)}
.brand__text{display:flex;align-items:baseline;gap:.5rem;min-width:0}
.brand__name{
  font-family:var(--font-display);font-weight:900;font-size:clamp(1rem,1.6vw,1.12rem);
  letter-spacing:.16em;line-height:1.2;
  color:var(--gold-soft);
  background:linear-gradient(100deg,#F2D38C 0%,#D6A84B 46%,#9c7526 72%,#F2D38C 100%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  padding-right:.16em;white-space:nowrap;
}
.brand__suffix{
  font-family:var(--font-mono);font-size:.62rem;letter-spacing:.24em;
  color:rgba(214,168,75,.85);padding-left:.45rem;border-left:1px solid var(--line-gold);
}
.brand__note{
  font-family:var(--font-mono);font-size:11px;line-height:1.5;letter-spacing:.14em;
  color:var(--text-mute);padding-left:.85rem;border-left:1px solid var(--line-soft);
}

.header-utility{display:flex;align-items:center;gap:.6rem;flex:none}
.version-chip{
  display:inline-flex;align-items:center;gap:.45rem;
  padding:.3rem .6rem;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;white-space:nowrap;
  color:rgba(244,239,230,.72);
  border:1px solid rgba(61,187,255,.28);border-radius:var(--radius);
  background:rgba(61,187,255,.06);
}
.version-chip__dot{width:6px;height:6px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 0 rgba(61,187,255,.55);animation:mg-pulse 2.6s var(--ease) infinite}
.version-chip__num{color:var(--blue)}
@keyframes mg-pulse{
  0%{box-shadow:0 0 0 0 rgba(61,187,255,.55)}
  70%{box-shadow:0 0 0 7px rgba(61,187,255,0)}
  100%{box-shadow:0 0 0 0 rgba(61,187,255,0)}
}

.nav-toggle{
  display:none;align-items:center;gap:.5rem;
  padding:.48rem .7rem;
  font-family:var(--font-display);font-size:var(--fs-12);font-weight:700;letter-spacing:.16em;
  color:var(--gold-soft);background:rgba(214,168,75,.07);
  border:1px solid var(--line-gold);border-radius:var(--radius);
  transition:background-color .2s var(--ease),border-color .2s var(--ease);
}
.nav-toggle:hover{background:rgba(214,168,75,.14);border-color:var(--gold)}
.nav-toggle__bars{position:relative;display:block;width:16px;height:10px}
.nav-toggle__bars::before,.nav-toggle__bars::after{content:"";position:absolute;left:0;width:16px;height:1px;background:currentColor;transition:transform .25s var(--ease),top .25s var(--ease)}
.nav-toggle__bars::before{top:1px}
.nav-toggle__bars::after{top:8px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:50%;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:50%;transform:rotate(-45deg)}

.site-nav{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding-block:.12rem .3rem}
.site-nav__list{display:flex;flex-wrap:wrap;align-items:center;gap:.05rem}
.site-nav__link{
  position:relative;display:inline-flex;align-items:baseline;gap:.5rem;
  padding:.55rem .8rem;
  font-size:.95rem;letter-spacing:.08em;color:rgba(244,239,230,.78);
  transition:color .2s var(--ease);
}
.site-nav__link::before{content:attr(data-index);font-family:var(--font-mono);font-size:.62rem;letter-spacing:.1em;color:var(--rock);transition:color .2s var(--ease)}
.site-nav__link::after{
  content:"";position:absolute;left:.8rem;bottom:.22rem;width:calc(100% - 1.6rem);height:1px;
  background:linear-gradient(90deg,var(--gold),rgba(214,168,75,.05));
  transform:scaleX(0);transform-origin:0 50%;transition:transform .24s var(--ease);
}
.site-nav__link:hover{color:var(--gold-soft)}
.site-nav__link:hover::before{color:var(--blue)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--gold-soft)}
.site-nav__link[aria-current="page"]::before{color:var(--gold)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}

.site-nav__aside{display:flex;align-items:center;gap:.75rem;flex:none}
.site-nav__lib{
  display:inline-flex;align-items:center;gap:.4rem;
  padding-left:.85rem;border-left:1px solid var(--line-soft);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--text-dim);
  transition:color .2s var(--ease);
}
.site-nav__lib::after{content:"→";color:var(--coral);transition:transform .2s var(--ease)}
.site-nav__lib:hover{color:var(--gold-soft)}
.site-nav__lib:hover::after{transform:translateX(3px)}

.header-rule{position:absolute;left:0;right:0;bottom:0;height:1px;pointer-events:none;background:linear-gradient(90deg,transparent,rgba(214,168,75,.55) 18%,rgba(139,92,246,.45) 52%,rgba(61,187,255,.4) 74%,transparent)}
.scroll-progress{
  position:absolute;left:0;bottom:0;z-index:2;width:100%;height:2px;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--blue),var(--violet) 38%,var(--gold) 72%,var(--coral));
  transition:transform .12s linear;
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(3rem,7vw,6rem);
  padding-block:clamp(2.4rem,5vw,4rem) 1.4rem;
  border-top:1px solid var(--line-gold);
  background:
    radial-gradient(46rem 26rem at 8% -10%,rgba(214,168,75,.16),transparent 62%),
    radial-gradient(38rem 24rem at 92% 0%,rgba(255,107,74,.10),transparent 64%),
    radial-gradient(40rem 30rem at 50% 120%,rgba(139,92,246,.12),transparent 62%),
    linear-gradient(180deg,#0c0c11,#07070a 82%);
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(90deg,rgba(244,239,230,.035) 0 1px,transparent 1px 88px);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 72%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 72%);
}
.footer-frame{position:relative;width:min(1320px,calc(100% - var(--gutter)*2));margin-inline:auto}
.footer-top{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:clamp(1.6rem,4vw,3.5rem);align-items:start}

.footer-lead__brand{
  font-family:var(--font-display);font-weight:900;font-size:clamp(1.15rem,2vw,1.5rem);
  letter-spacing:.18em;line-height:1.3;
  color:var(--gold-soft);
  background:linear-gradient(100deg,#F2D38C,#D6A84B 55%,#a67c2a);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  padding-right:.2em;
}
.footer-lead__text{margin-top:.7rem;max-width:24rem;font-size:var(--fs-14);line-height:1.9;color:var(--text-dim)}
.footer-lead .btn{margin-top:1.2rem}

.footer-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.4rem}
.footer-col__title{
  font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:.22em;
  color:var(--gold);text-transform:uppercase;padding-bottom:.55rem;border-bottom:1px solid var(--line-soft);
}
.footer-col__list{margin-top:.75rem;display:grid;gap:.42rem}
.footer-link{
  display:inline-block;font-size:var(--fs-14);letter-spacing:.06em;color:var(--text-dim);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.footer-link:hover{color:var(--gold-soft);border-color:var(--line-gold);transform:translateX(2px)}

.footer-contact{
  margin-top:clamp(1.8rem,4vw,2.8rem);padding-top:clamp(1.2rem,2.5vw,1.8rem);
  border-top:1px solid var(--line-soft);
  display:grid;grid-template-columns:minmax(0,2fr) minmax(0,10fr);gap:.8rem 2rem;align-items:start;
}
.footer-contact__title{font-family:var(--font-mono);font-size:11px;letter-spacing:.22em;color:var(--gold);padding-top:.32rem}
.footer-contact__list{display:grid;grid-template-columns:repeat(auto-fit,minmax(14rem,1fr));gap:.6rem 1.6rem}
.footer-contact__item{display:flex;flex-wrap:wrap;align-items:baseline;gap:.25rem .7rem;font-size:var(--fs-14);line-height:1.7}
.footer-contact__key{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--text-mute);min-width:4.4rem}
.footer-contact__val{color:rgba(244,239,230,.82);font-size:13.5px}

.footer-meta{
  margin-top:clamp(1.6rem,3vw,2.4rem);padding-top:1rem;
  border-top:1px solid var(--line-soft);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:.5rem 1.5rem;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;color:var(--text-mute);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{margin-block:clamp(1rem,2vw,1.6rem)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:.45rem;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--text-mute)}
.breadcrumb__list>li+li::before{content:"/";margin-right:.45rem;color:rgba(214,168,75,.55)}
.breadcrumb__link{color:var(--text-dim);transition:color .18s var(--ease)}
.breadcrumb__link:hover{color:var(--gold-soft)}
.breadcrumb__here{color:var(--gold-soft)}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.2rem .55rem;border-radius:2px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;
  color:var(--gold-soft);border:1px solid var(--line-gold);background:rgba(214,168,75,.07);
}
.tag--violet{color:#cbb9ff;border-color:rgba(139,92,246,.5);background:rgba(139,92,246,.12)}
.tag--blue{color:#a8e0ff;border-color:rgba(61,187,255,.45);background:rgba(61,187,255,.1)}
.tag--coral{color:#ffb3a2;border-color:rgba(255,107,74,.5);background:rgba(255,107,74,.12)}

/* ---------- 卡片 ---------- */
.card{
  position:relative;padding:clamp(1.1rem,2vw,1.6rem);
  background:linear-gradient(160deg,rgba(26,27,32,.92),rgba(13,13,18,.94));
  border:1px solid var(--line-soft);border-radius:var(--radius);box-shadow:var(--shadow-soft);
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.card:hover{border-color:var(--line-gold);transform:translateY(-2px);box-shadow:0 30px 60px -42px rgba(214,168,75,.55)}
.card__head{display:flex;align-items:baseline;justify-content:space-between;gap:.8rem;margin-bottom:.55rem}
.card__title{font-family:var(--font-serif);font-size:var(--fs-20);font-weight:700;letter-spacing:.04em;color:var(--paper)}
.card__meta{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--text-mute)}
.card__index{
  display:inline-block;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--rock);
  transition:transform .22s var(--ease),color .22s var(--ease);
}
.card:hover .card__index{transform:translateY(-3px);color:var(--gold)}

/* ---------- 纸面面板 ---------- */
.panel{
  padding:clamp(1.2rem,3vw,2.4rem);
  border:1px solid var(--line-soft);border-radius:var(--radius);
  background:linear-gradient(165deg,rgba(26,27,32,.9),rgba(12,12,17,.94));
  color:var(--text);box-shadow:var(--shadow-soft);
}
.panel--paper{
  border-color:rgba(11,11,15,.16);
  background:linear-gradient(180deg,#F6F2EA,#EDE7DB);
  color:#26271f;
  box-shadow:0 34px 80px -58px rgba(0,0,0,.95);
}
.panel--paper h2,.panel--paper h3,.panel--paper h4{color:#14150f}
.panel--paper .prose{color:#2c2d26}
.panel--paper .card__meta,.panel--paper .figure-caption{color:rgba(32,33,28,.55)}

/* ---------- 时间轴 ---------- */
.ledger{position:relative;padding-left:1.4rem}
.ledger::before{
  content:"";position:absolute;left:.32rem;top:.5rem;bottom:.5rem;width:1px;
  background:linear-gradient(180deg,rgba(214,168,75,.6),rgba(139,92,246,.35) 60%,rgba(61,187,255,.22));
}
.ledger__item{position:relative;padding-block:.7rem}
.ledger__dot{
  position:absolute;left:-1.16rem;top:1.2rem;width:8px;height:8px;border-radius:50%;
  background:var(--blue);box-shadow:0 0 0 3px rgba(61,187,255,.16);
  transition:background-color .22s var(--ease),box-shadow .22s var(--ease);
}
.ledger__item[data-state="new"] .ledger__dot{background:var(--coral);box-shadow:0 0 0 3px rgba(255,107,74,.2)}

/* ---------- 图像容器 ---------- */
.media-frame{
  position:relative;overflow:hidden;
  border:1px solid var(--line-soft);border-radius:var(--radius);
  aspect-ratio:16/10;
  background:
    radial-gradient(120% 90% at 78% 8%,rgba(139,92,246,.32),transparent 60%),
    radial-gradient(90% 80% at 12% 92%,rgba(61,187,255,.24),transparent 62%),
    radial-gradient(100% 78% at 50% 50%,rgba(214,168,75,.16),transparent 70%),
    linear-gradient(160deg,#16171d,#0a0a0e);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,transparent 42%,rgba(8,8,11,.72));
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.figure-caption{margin-top:.6rem;font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--text-mute)}

/* ---------- 显现协议 ---------- */
[data-reveal].is-pending{opacity:0;transform:translateY(16px)}
[data-reveal].is-revealed{opacity:1;transform:none;transition:opacity .55s var(--ease),transform .55s var(--ease)}
.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}

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  .brand__note{display:none}
}
@media (max-width:1000px){
  .span-3{grid-column:span 6}
  .footer-top{grid-template-columns:1fr}
}
@media (max-width:980px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;left:0;right:0;top:100%;
    display:block;
    padding:0 var(--gutter);
    max-height:0;overflow:hidden;opacity:0;visibility:hidden;
    background:linear-gradient(180deg,#0d0d13 0%,#08080b 100%);
    border-bottom:1px solid var(--line-gold);
    box-shadow:0 34px 70px -46px #000;
    transition:max-height .34s var(--ease),opacity .26s var(--ease),visibility .26s,padding .3s var(--ease);
  }
  .site-nav[data-open]{max-height:min(74vh,32rem);overflow-y:auto;opacity:1;visibility:visible;padding-block:.35rem 1.1rem}
  .site-nav__list{display:block}
  .site-nav__list>li+li{border-top:1px solid var(--line-soft)}
  .site-nav__link{display:flex;width:100%;align-items:baseline;padding:.85rem .2rem;font-size:var(--fs-16);letter-spacing:.1em}
  .site-nav__link::after{left:.2rem;width:2.4rem;bottom:.55rem}
  .site-nav__aside{margin-top:.9rem;padding-top:.9rem;border-top:1px solid var(--line-soft)}
  .site-nav__lib{border-left:0;padding-left:0;font-size:12px}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-contact{grid-template-columns:1fr}
}
@media (max-width:760px){
  .grid-12>*{grid-column:span 12}
  .footer-contact__key{min-width:3.6rem}
}
@media (max-width:640px){
  .version-chip__text{display:none}
  .brand__suffix{display:none}
  .header-utility .btn{display:none}
}
@media (max-width:520px){
  .footer-cols{grid-template-columns:1fr;gap:1.2rem}
  .footer-meta{font-size:11px}
  .footer-contact__item{display:block}
  .footer-contact__key{display:block}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  [data-reveal].is-pending{opacity:1;transform:none}
  .scroll-progress{transition:none}
}