/* ============================================================
   安博电竞站 · 共享外壳样式 /assets/site.css
   暗夜蓝基底 + 霓虹青/电光紫高亮 + 暖橙数据点
   ============================================================ */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
h1,h2,h3,h4,p,dl,dd,figure{margin:0}
ul,ol{margin:0}
img,svg,video{max-width:100%}
button{font:inherit;color:inherit}
a{color:inherit}

/* ---------- tokens ---------- */
:root{
  --night:#0A1322;
  --night-2:#0B1626;
  --rock:#122036;
  --glass:#1E3A52;
  --cyan:#31E4D2;
  --violet:#8B6CF0;
  --amber:#FF8B3D;
  --stone:#93A0B4;
  --moss:#7FB08C;
  --clay:#C67C5B;
  --cream:#F3F0E7;
  --ink:#DCE4F0;

  --cyan-soft:rgba(49,228,210,.16);
  --violet-soft:rgba(139,108,240,.18);
  --amber-soft:rgba(255,139,61,.16);
  --line:rgba(147,160,180,.22);
  --line-strong:rgba(147,160,180,.4);
  --glass-bg:rgba(30,58,82,.44);
  --glass-stroke:rgba(147,160,180,.28);

  --shadow-lg:0 24px 60px rgba(3,8,16,.6);
  --shell-w:1220px;
  --radius:3px;
  --ease:cubic-bezier(.22,.68,.24,1);
  --dur:.22s;

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

/* ---------- base ---------- */
body{
  min-height:100%;
  background-color:var(--night);
  background-image:
    linear-gradient(90deg, rgba(147,160,180,.05) 1px, transparent 1px),
    linear-gradient(180deg, rgba(147,160,180,.05) 1px, transparent 1px),
    radial-gradient(1100px 620px at 88% -10%, rgba(139,108,240,.20), transparent 62%),
    radial-gradient(900px 520px at 2% 6%, rgba(49,228,210,.13), transparent 64%),
    linear-gradient(180deg,#0A1322 0%,#0A1322 46%,#0B1626 100%);
  background-size:72px 72px,72px 72px,auto,auto,auto;
  background-repeat:repeat,repeat,no-repeat,no-repeat,no-repeat;
  background-attachment:fixed,fixed,fixed,fixed,fixed;
  color:var(--cream);
  font-family:var(--font-body);
  font-size:16.5px;
  font-weight:400;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
::selection{background:rgba(49,228,210,.32);color:#fff}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px}
h1,h2,h3{font-family:var(--font-display);font-weight:800;letter-spacing:-.01em;line-height:1.2}

.shell{width:100%;max-width:var(--shell-w);margin-inline:auto;padding-inline:clamp(16px,4vw,32px)}
.mono{font-family:var(--font-mono);font-size:.92em;letter-spacing:.02em}
.muted{color:var(--stone)}

/* ---------- skip link ---------- */
.skip-link{
  position:absolute;top:-120px;left:clamp(16px,4vw,32px);z-index:200;
  display:inline-flex;align-items:center;min-height:44px;padding:0 18px;
  background:var(--cyan);color:#05141B;font-family:var(--font-mono);font-size:13px;
  letter-spacing:.06em;text-decoration:none;border-radius:var(--radius);
  transition:top var(--dur) var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{top:10px;outline:2px solid var(--violet);outline-offset:2px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:linear-gradient(180deg, rgba(10,19,34,.97), rgba(10,19,34,.88));
  -webkit-backdrop-filter:blur(14px) saturate(130%);
  backdrop-filter:blur(14px) saturate(130%);
  border-bottom:1px solid var(--line);
}
.header-shell{position:relative}

.brand-bar{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:11px 0;border-bottom:1px solid var(--line);
  max-height:120px;overflow:hidden;
  transition:max-height .3s var(--ease),opacity .2s var(--ease),padding .3s var(--ease);
}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-sigil{
  flex:0 0 auto;width:36px;height:36px;display:grid;place-items:center;
  font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.08em;
  color:var(--cyan);border:1px solid rgba(49,228,210,.55);border-radius:2px;
  background:linear-gradient(135deg, rgba(49,228,210,.18), rgba(139,108,240,.22));
  box-shadow:inset 0 0 12px rgba(49,228,210,.18);
}
.brand-text{display:flex;flex-direction:column;min-width:0}
.brand-name{
  font-family:var(--font-display);font-weight:800;font-size:17px;letter-spacing:-.01em;
  line-height:1.25;color:var(--cream);white-space:nowrap;
}
.brand-sub{
  font-family:var(--font-mono);font-size:11px;line-height:1.5;letter-spacing:.06em;
  color:var(--stone);white-space:nowrap;
}
.brand-meta{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.v-chip{
  display:inline-flex;align-items:center;gap:6px;padding:3px 9px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;line-height:1.6;
  color:var(--stone);background:rgba(18,32,54,.6);
  border:1px solid var(--line-strong);border-radius:2px;
}
.v-chip-key{font-size:10px;color:var(--stone)}
.v-chip--v3{
  color:var(--cyan);border-color:rgba(49,228,210,.55);background:var(--cyan-soft);
  box-shadow:0 0 14px rgba(49,228,210,.18);
}
.v-chip--v3 .v-chip-key{color:rgba(49,228,210,.75)}
.icp-chip{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.04em;color:var(--stone);
  padding:3px 9px;border:1px dashed var(--line-strong);border-radius:2px;white-space:nowrap;
}

.nav-bar{display:flex;align-items:center;gap:16px;padding:0}
.nav-toggle{
  display:none;align-items:center;gap:10px;min-height:44px;padding:0 14px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--cream);
  background:var(--glass-bg);border:1px solid var(--glass-stroke);border-radius:2px;cursor:pointer;
  transition:border-color var(--dur),color var(--dur),background-color var(--dur);
}
.nav-toggle:hover{border-color:rgba(49,228,210,.6);color:var(--cyan)}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle-bars i{display:block;height:1.5px;background:currentColor;border-radius:1px;transition:transform var(--dur) var(--ease),opacity var(--dur)}
.nav-toggle-bars i:nth-child(2){width:70%}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}
.nav-toggle-label{white-space:nowrap}

.nav{flex:1 1 auto}
.nav-list{display:flex;flex-wrap:wrap;align-items:stretch;gap:2px;list-style:none;padding:0}
.nav-item{display:flex}
.nav-link{
  position:relative;display:inline-flex;align-items:center;gap:8px;min-height:52px;padding:0 15px;
  color:var(--cream);font-size:15px;text-decoration:none;
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:10px;right:10px;bottom:0;height:2px;border-radius:1px;
  background:linear-gradient(90deg,var(--cyan),var(--violet));
  transform:scaleX(0);transform-origin:left center;
  transition:transform .24s var(--ease);
}
.nav-link:hover{color:var(--cyan);background:rgba(49,228,210,.06)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:#fff;background:linear-gradient(180deg, rgba(49,228,210,0), rgba(49,228,210,.12))}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.nav-link[aria-current="page"] .nav-idx{color:var(--cyan)}
.nav-idx{font-family:var(--font-mono);font-size:10px;letter-spacing:.06em;color:var(--stone);transition:color var(--dur)}
.nav-link:hover .nav-idx{color:var(--violet)}

.nav-readout{
  display:flex;align-items:center;gap:10px;margin-left:auto;padding-left:18px;
  border-left:1px solid var(--line);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--stone);
}
.readout-key{display:inline-flex;align-items:center;gap:6px;color:var(--moss)}
.readout-key::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--moss);
  box-shadow:0 0 10px rgba(127,176,140,.9);
}
.readout-val{color:var(--stone)}

.site-header[data-condensed="true"] .brand-bar{
  max-height:0;padding-top:0;padding-bottom:0;opacity:0;border-bottom-color:transparent;
}
.site-header[data-condensed="true"] .nav-link{min-height:46px}

.progress-rail{
  position:absolute;left:0;right:0;bottom:0;height:2px;z-index:2;
  background:rgba(147,160,180,.12);pointer-events:none;
}
.progress-bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--violet) 68%,var(--amber));
  box-shadow:0 0 12px rgba(49,228,210,.55);
  transition:width .1s linear;
}

/* ---------- footer ---------- */
.site-footer{
  position:relative;margin-top:clamp(56px,8vw,104px);
  background:linear-gradient(180deg, rgba(18,32,54,.78), rgba(10,19,34,1));
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--violet) 55%,var(--amber));opacity:.8;
}
.footer-shell{padding:clamp(36px,5vw,58px) clamp(16px,4vw,32px) 26px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1.4fr 1fr;gap:32px 28px}
.footer-col{min-width:0}
.footer-title{
  display:flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.16em;
  color:var(--stone);margin:0 0 14px;
}
.footer-title::before{content:"";width:14px;height:1px;background:var(--cyan);flex:0 0 auto}
.footer-brand-name{font-family:var(--font-display);font-weight:800;font-size:20px;color:var(--cream);letter-spacing:-.01em}
.footer-line{font-family:var(--font-mono);font-size:12px;letter-spacing:.05em;color:var(--cyan);margin-top:6px}
.footer-note{font-size:14px;line-height:1.7;color:var(--stone);margin-top:10px;max-width:34ch}
.footer-links{list-style:none;padding:0;display:grid;gap:7px}
.footer-link{
  display:inline-block;font-size:14.5px;color:#C7D1DF;text-decoration:none;
  transition:color var(--dur),transform var(--dur);
}
.footer-link:hover{color:var(--cyan);transform:translateX(3px)}
.footer-contact{display:grid;gap:10px}
.footer-contact-row{display:grid;grid-template-columns:74px minmax(0,1fr);gap:10px;align-items:baseline}
.footer-contact-row dt{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--stone)}
.footer-contact-row dd{font-size:14px;color:#DEE6F1;word-break:break-word;margin:0}
.footer-contact-note{
  margin-top:14px;padding-left:12px;border-left:2px solid rgba(255,139,61,.5);
  font-size:13px;line-height:1.7;color:var(--stone);
}
.footer-meta-list{list-style:none;padding:0;display:grid;gap:9px}
.footer-meta-list li{
  display:flex;justify-content:space-between;gap:12px;align-items:baseline;
  padding-bottom:8px;border-bottom:1px dashed var(--line);
}
.footer-meta-key{font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--stone)}
.footer-meta-val{font-family:var(--font-mono);font-size:13px;color:var(--cream);letter-spacing:.02em}
.footer-base{
  display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px 24px;
  margin-top:clamp(28px,4vw,44px);padding-top:18px;border-top:1px solid var(--line);
}
.footer-status{
  display:flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.04em;color:var(--stone);
}
.footer-status::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--moss);
  box-shadow:0 0 8px rgba(127,176,140,.9);flex:0 0 auto;
}
.footer-year{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:var(--stone)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border:1px solid transparent;border-radius:2px;
  font-family:var(--font-display);font-size:15px;font-weight:700;letter-spacing:.01em;
  text-decoration:none;cursor:pointer;
  transition:transform var(--dur) var(--ease),background-color var(--dur),border-color var(--dur),color var(--dur),box-shadow var(--dur);
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn--primary{background:linear-gradient(135deg,var(--cyan),#25C9BB);color:#04161B;box-shadow:0 12px 28px rgba(49,228,210,.22)}
.btn--primary:hover{box-shadow:0 16px 34px rgba(49,228,210,.32)}
.btn--violet{background:linear-gradient(135deg,var(--violet),#6E4EDC);color:#0A0A1A;box-shadow:0 12px 28px rgba(139,108,240,.25)}
.btn--ghost{background:rgba(30,58,82,.42);border-color:var(--line-strong);color:var(--cream)}
.btn--ghost:hover{border-color:rgba(49,228,210,.6);color:var(--cyan)}
.btn--amber{background:linear-gradient(135deg,var(--amber),#F0731E);color:#1A0D03;box-shadow:0 12px 28px rgba(255,139,61,.22)}
.btn--sm{min-height:36px;padding:0 14px;font-size:13px}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:2px 8px;line-height:1.7;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--stone);
  border:1px solid var(--line-strong);border-radius:2px;
}
.tag--v3{color:var(--cyan);border-color:rgba(49,228,210,.5);background:var(--cyan-soft)}
.tag--v2{color:var(--moss);border-color:rgba(127,176,140,.5);background:rgba(127,176,140,.14)}
.tag--v1{color:var(--clay);border-color:rgba(198,124,91,.5);background:rgba(198,124,91,.14)}
.tag--amber{color:var(--amber);border-color:rgba(255,139,61,.5);background:var(--amber-soft)}

/* ---------- section / text ---------- */
.section{padding-block:clamp(46px,6.5vw,88px);position:relative}
.section--rock{
  background:linear-gradient(180deg, rgba(18,32,54,.72), rgba(18,32,54,0));
  border-block:1px solid rgba(147,160,180,.14);
}
.section-head{max-width:64ch;margin-bottom:clamp(20px,3vw,32px)}
.section-title{font-size:clamp(26px,3.6vw,40px);margin:0 0 12px}
.section-summary{font-size:16px;line-height:1.75;color:#C3CEDD;max-width:60ch}
.eyebrow{
  display:flex;align-items:center;gap:10px;margin:0 0 12px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.16em;color:var(--stone);
}
.eyebrow::before{content:"";width:26px;height:1px;flex:0 0 auto;background:linear-gradient(90deg,var(--cyan),transparent)}
.eyebrow-idx{color:var(--cyan)}
.divider{height:1px;border:0;margin:clamp(26px,4vw,52px) 0;background:linear-gradient(90deg, rgba(147,160,180,.35), rgba(147,160,180,.04))}

.prose{max-width:68ch;font-size:16.5px;line-height:1.75;color:#DAE3EF}
.prose p{margin:0 0 1.2em}
.prose h2{font-size:24px;margin:1.8em 0 .6em}
.prose h3{font-size:19px;font-weight:700;margin:1.5em 0 .5em}
.prose ul,.prose ol{padding-left:1.35em;margin:0 0 1.2em}
.prose li{margin:.35em 0}
.prose strong{color:#fff}
.prose code{font-family:var(--font-mono);font-size:.92em;color:var(--amber);background:rgba(255,139,61,.1);padding:1px 6px;border-radius:2px}
.prose blockquote{margin:1.4em 0;padding:4px 0 4px 18px;border-left:3px solid rgba(139,108,240,.5);color:var(--stone)}

.breadcrumb{padding:14px 0;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:var(--stone)}
.breadcrumb-list{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0}
.breadcrumb-item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb-item + .breadcrumb-item::before{content:"／";color:rgba(147,160,180,.5)}
.breadcrumb-link{color:var(--stone);text-decoration:none;transition:color var(--dur)}
.breadcrumb-link:hover{color:var(--cyan)}
.breadcrumb-current{color:var(--cream)}

/* ---------- layout ---------- */
.grid{display:grid;gap:clamp(16px,2vw,22px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.split{display:grid;grid-template-columns:5fr 7fr;gap:clamp(20px,3vw,40px);align-items:start}
.split--reverse{grid-template-columns:7fr 5fr}

/* ---------- surfaces ---------- */
.panel{
  border:1px solid var(--line);border-radius:2px;background:var(--rock);
  padding:clamp(18px,2.4vw,26px);
}
.panel--glass{
  background:var(--glass-bg);border-color:var(--glass-stroke);
  -webkit-backdrop-filter:blur(12px) saturate(120%);
  backdrop-filter:blur(12px) saturate(120%);
}
.focus-unit{
  position:relative;padding:clamp(20px,3vw,34px);border:1px solid rgba(49,228,210,.35);border-radius:2px;
  background:linear-gradient(135deg, rgba(49,228,210,.10), rgba(139,108,240,.12) 55%, rgba(255,139,61,.08));
  box-shadow:0 0 0 1px rgba(139,108,240,.16), var(--shadow-lg);
}
.focus-unit::before,.focus-unit::after{content:"";position:absolute;width:14px;height:14px;border:2px solid var(--cyan);pointer-events:none}
.focus-unit::before{top:-1px;left:-1px;border-right:0;border-bottom:0}
.focus-unit::after{bottom:-1px;right:-1px;border-left:0;border-top:0}

.frame{
  position:relative;border:1px solid var(--line-strong);border-radius:2px;
  background:linear-gradient(160deg, rgba(18,32,54,.78), rgba(10,19,34,.55));
  padding:clamp(20px,3.4vw,46px);
}
.frame::before,.frame::after{
  content:"";position:absolute;top:10px;bottom:10px;width:8px;pointer-events:none;opacity:.7;
  background-image:repeating-linear-gradient(180deg, rgba(147,160,180,.5) 0 1px, transparent 1px 13px);
}
.frame::before{left:-5px}
.frame::after{right:-5px;background-image:repeating-linear-gradient(180deg, rgba(49,228,210,.45) 0 1px, transparent 1px 13px)}
.frame-label{
  position:absolute;top:0;left:24px;transform:translateY(-50%);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;color:var(--cyan);
  background:var(--night);padding:2px 8px;border:1px solid rgba(49,228,210,.35);border-radius:2px;
}

/* ---------- index / data / track ---------- */
.index-list{list-style:none;padding:0;border-top:1px solid var(--line)}
.index-row{
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:14px;align-items:baseline;
  padding:12px 10px 12px 4px;border-bottom:1px solid var(--line);
  line-height:1.4;text-decoration:none;color:inherit;
  transition:background-color .18s var(--ease),transform .18s var(--ease);
}
.index-row:hover{background:rgba(49,228,210,.06);transform:translateX(3px)}
.index-num{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--cyan)}
.index-label{font-size:15px;color:var(--cream)}
.index-meta{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.04em;color:var(--stone);white-space:nowrap}

.data-panel{border:1px solid var(--line);border-radius:2px;background:rgba(18,32,54,.62);padding:4px 16px}
.data-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:14px;align-items:baseline;padding:11px 0;border-bottom:1px dashed var(--line)}
.data-row:last-child{border-bottom:0}
.data-key{font-size:14px;color:var(--stone)}
.data-val{font-family:var(--font-mono);font-size:15px;letter-spacing:.02em;color:var(--amber)}

.stat{display:flex;flex-direction:column;gap:4px}
.stat-value{font-family:var(--font-mono);font-size:clamp(24px,3.2vw,34px);line-height:1.1;letter-spacing:.02em;color:var(--cyan)}
.stat-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--stone)}
.stat-unit{font-family:var(--font-mono);font-size:13px;color:var(--amber);margin-left:4px}

.track{list-style:none;padding:0 0 0 24px;position:relative}
.track::before{
  content:"";position:absolute;left:6px;top:8px;bottom:8px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,var(--clay),var(--moss) 40%,var(--cyan) 72%,var(--violet));
}
.track-item{position:relative;padding:0 0 24px}
.track-item:last-child{padding-bottom:0}
.track-item::before{
  content:"";position:absolute;left:-22px;top:7px;width:10px;height:10px;border-radius:50%;
  background:var(--night);border:2px solid var(--cyan);box-shadow:0 0 0 3px rgba(49,228,210,.14);
}
.track-item--v2::before{border-color:var(--moss);box-shadow:0 0 0 3px rgba(127,176,140,.16)}
.track-item--v1::before{border-color:var(--clay);box-shadow:0 0 0 3px rgba(198,124,91,.16)}
.track-title{display:block;font-family:var(--font-display);font-weight:700;font-size:16px;color:var(--cream)}
.track-body{display:block;margin-top:2px;font-size:14.5px;line-height:1.7;color:var(--stone)}

/* ---------- media ---------- */
.figure{margin:0}
.figure-media{
  position:relative;width:100%;overflow:hidden;border:1px solid var(--line);border-radius:2px;
  background:linear-gradient(135deg, rgba(30,58,82,.85), rgba(10,19,34,.92));
}
.figure-media img,.figure-media svg,.figure-media video{display:block;width:100%;height:100%;object-fit:cover}
.figure-media--wide{aspect-ratio:16/9}
.figure-media--tall{aspect-ratio:3/4}
.figure-media--square{aspect-ratio:1/1}
.figure-media--placeholder{
  background-image:
    repeating-linear-gradient(90deg, rgba(49,228,210,.16) 0 1px, transparent 1px 30px),
    repeating-linear-gradient(180deg, rgba(139,108,240,.14) 0 1px, transparent 1px 30px),
    linear-gradient(135deg, rgba(30,58,82,.9), rgba(10,19,34,.95));
}
.figure-caption{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 14px;margin-top:10px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.05em;color:var(--stone);
}

/* ---------- reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .34s var(--ease),transform .34s var(--ease)}
[data-reveal].is-visible{opacity:1;transform:none}
.is-active{color:var(--cyan)}

/* ---------- responsive ---------- */
@media (max-width:1240px){
  .nav-link{padding:0 12px;font-size:14.5px}
}
@media (max-width:1080px){
  .nav-readout{display:none}
}
@media (max-width:1024px){
  .split,.split--reverse{grid-template-columns:1fr;gap:28px}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 24px}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .nav-bar{justify-content:space-between;padding:10px 0}
  .nav{
    position:fixed;left:0;right:0;bottom:0;z-index:90;
    max-height:84vh;overflow-y:auto;
    padding:16px clamp(16px,4vw,24px) calc(22px + env(safe-area-inset-bottom));
    background:linear-gradient(180deg, rgba(18,32,54,.98), rgba(10,19,34,.99));
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
    border-top:1px solid rgba(49,228,210,.4);
    box-shadow:0 -24px 60px rgba(3,8,16,.7);
    transform:translateY(110%);visibility:hidden;
    transition:transform .3s var(--ease),visibility .3s var(--ease);
  }
  .nav[data-open]{transform:translateY(0);visibility:visible}
  .nav-list{flex-direction:column;gap:0}
  .nav-item{border-bottom:1px solid var(--line)}
  .nav-item:last-child{border-bottom:0}
  .nav-link{width:100%;min-height:52px;padding:0 4px;font-size:16px;justify-content:flex-start}
  .nav-link::after{
    left:0;right:auto;top:10px;bottom:10px;width:3px;height:auto;
    transform:scaleY(0);transform-origin:top center;
    background:linear-gradient(180deg,var(--cyan),var(--violet));
  }
  .nav-link:hover::after,.nav-link[aria-current="page"]::after{transform:scaleY(1)}
  body.nav-open{overflow:hidden}
  body.nav-open::after{
    content:"";position:fixed;inset:0;z-index:78;background:rgba(4,9,18,.62);
  }
}
@media (max-width:860px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:720px){
  .brand-sub{display:none}
}
@media (max-width:640px){
  body{font-size:16px}
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .index-row{grid-template-columns:auto minmax(0,1fr)}
  .index-meta{grid-column:2;white-space:normal}
  .brand-sigil{width:32px;height:32px;font-size:11px}
  .brand-name{font-size:15.5px}
}
@media (max-width:400px){
  .icp-chip{display:none}
  .nav-toggle-label{display:none}
}

/* ---------- motion ---------- */
@media (prefers-reduced-motion: no-preference){
  .readout-key::before{animation:readoutPulse 2.8s ease-in-out infinite}
}
@keyframes readoutPulse{0%,100%{opacity:1}50%{opacity:.32}}
@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]{opacity:1;transform:none}
  .progress-bar{transition:none}
}