:root{
  --bg:#060a14;--bg2:#0a1020;--panel:#0e1728;--panel2:#121d31;--card:#101a2c;
  --text:#edf5ff;--muted:#9fb0c8;--soft:#c8d5e8;--line:rgba(255,255,255,.12);
  --cyan:#5ee7ff;--green:#75ffb8;--max:1180px;--radius:28px;--shadow:0 28px 90px rgba(0,0,0,.35);
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;line-height:1.55}a{text-decoration:none;color:inherit}img{max-width:100%;display:block}
.bg-grid{position:fixed;inset:0;z-index:-2;background:radial-gradient(circle at 20% 10%,rgba(94,231,255,.22),transparent 32%),radial-gradient(circle at 82% 18%,rgba(117,255,184,.12),transparent 32%),linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:auto,auto,48px 48px,48px 48px}
.site-header{position:sticky;top:0;z-index:20;border-bottom:1px solid var(--line);background:rgba(6,10,20,.76);backdrop-filter:blur(20px)}
.header-inner{max-width:var(--max);margin:0 auto;padding:18px 22px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:12px;font-weight:850;letter-spacing:.08em}.brand img{width:34px;height:34px}.brand small{display:block;font-size:10px;color:var(--muted);letter-spacing:.16em;margin-top:-3px}
.nav{display:flex;align-items:center;gap:28px;color:var(--muted);font-size:14px}.nav a:hover{color:var(--text)}.nav .pill{border:1px solid var(--line);border-radius:999px;padding:9px 14px;color:var(--text)}
.menu{display:none;background:transparent;border:1px solid var(--line);color:var(--text);border-radius:12px;padding:8px 11px}
.section{max-width:var(--max);margin:0 auto;padding:104px 22px}.section.compact{padding:72px 22px}.eyebrow{margin:0 0 16px;color:var(--green);font-size:12px;letter-spacing:.18em;text-transform:uppercase;font-weight:850}.section-head{max-width:760px;margin-bottom:40px}.section-head.center{text-align:center;margin-left:auto;margin-right:auto}.section-head h2,.hero h1,.page-hero h1{margin:0;letter-spacing:-.055em;line-height:1.12}.section-head h2{font-size:clamp(34px,4vw,56px)}.section-head p,.lead{color:var(--muted);font-size:18px}
.hero{max-width:var(--max);margin:0 auto;padding:96px 22px 72px;display:grid;grid-template-columns:44% 56%;align-items:center;gap:34px;min-height:calc(100vh - 74px)}
.hero h1{font-size:clamp(56px,8vw,112px)}.hero-kicker{margin:0 0 14px;color:var(--soft);font-weight:850;letter-spacing:.12em;text-transform:uppercase;font-size:13px}.lead{max-width:620px;margin:28px 0 0}.hero .lead{max-width:540px}.actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:13px 20px;border-radius:999px;border:1px solid var(--line);font-weight:800}.btn.primary{border:0;color:#06101b;background:linear-gradient(135deg,var(--cyan),var(--green))}.btn:hover{transform:translateY(-1px)}
.hero-visual img{filter:drop-shadow(0 40px 80px rgba(0,0,0,.35))}
.spec-strip{max-width:var(--max);margin:0 auto;padding:0 22px 84px;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.metric{background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.035));border:1px solid var(--line);border-radius:24px;padding:24px;min-height:150px}.metric strong{display:block;font-size:50px;line-height:.95;letter-spacing:-.05em}.metric span{display:block;color:var(--muted);margin-top:12px}.metric small{color:var(--cyan);font-weight:800;text-transform:uppercase;letter-spacing:.12em;font-size:11px}
.cards{display:grid;gap:18px}.cards.three{grid-template-columns:repeat(3,1fr)}.cards.four{grid-template-columns:repeat(4,1fr)}.card{background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.028));border:1px solid var(--line);border-radius:var(--radius);padding:26px;min-height:210px}.card h3{margin:0 0 12px;font-size:22px;letter-spacing:-.02em}.card p{color:var(--muted);margin:0}.card .icon{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,rgba(94,231,255,.2),rgba(117,255,184,.14));display:grid;place-items:center;margin-bottom:18px;color:var(--green);font-weight:900}
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}.visual-panel{background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:36px;padding:14px;box-shadow:var(--shadow)}
.product-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:22px}.product-card{border:1px solid var(--line);border-radius:32px;background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.03));padding:34px}.product-card h3{font-size:34px;letter-spacing:-.04em;margin:0 0 10px}.product-card p{color:var(--muted)}.spec-table{width:100%;border-collapse:collapse;margin-top:18px}.spec-table td{border-top:1px solid var(--line);padding:13px 0;color:var(--muted)}.spec-table td:first-child{color:var(--soft);font-weight:750;width:42%}
.dark-band{max-width:none;background:linear-gradient(180deg,#091122,#060a14);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.dark-band .section{padding-top:96px;padding-bottom:96px}
.cta{max-width:var(--max);margin:100px auto;border:1px solid var(--line);border-radius:38px;padding:48px;background:linear-gradient(135deg,rgba(94,231,255,.16),rgba(117,255,184,.08));display:block}.cta h2{font-size:clamp(32px,4vw,54px);letter-spacing:-.05em;line-height:1.12;margin:0}.cta p{color:var(--muted)}.cta .btn{margin-top:24px}
.footer{border-top:1px solid var(--line);padding:42px 22px 54px}.footer-inner{max-width:var(--max);margin:auto;display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:30px;color:var(--muted)}.footer b{color:var(--text)}.footer a{display:block;margin:8px 0;color:var(--muted)}.footer a:hover{color:var(--text)}
.page-hero{max-width:var(--max);margin:auto;padding:86px 22px 56px}.page-hero h1{font-size:clamp(46px,6vw,82px);line-height:1.15;letter-spacing:-.052em;max-width:960px}.applications-hero h1{line-height:1.22;letter-spacing:-.045em;max-width:920px}.applications-hero .lead{margin-top:38px;max-width:650px}.resources-hero h1{line-height:1.16}.download-card{display:flex;justify-content:space-between;gap:22px;align-items:center;border:1px solid var(--line);border-radius:28px;background:rgba(255,255,255,.05);padding:26px;margin-top:18px}.download-card p{color:var(--muted);margin:6px 0 0}
.release-list{display:grid;gap:22px}.release-block{border:1px solid var(--line);border-radius:28px;background:rgba(255,255,255,.05);padding:30px}.release-block h2{margin:0 0 18px;letter-spacing:-.03em}.release-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.release-columns h3{font-size:15px;color:var(--green);text-transform:uppercase;letter-spacing:.12em}.release-columns ul{padding-left:18px;color:var(--muted)}
@media (min-width:981px){.page-hero h1{line-height:1.17}.section-head h2{line-height:1.13}.applications-hero h1{line-height:1.24}}
@media(max-width:980px){.hero,.split,.product-grid{grid-template-columns:1fr}.hero{padding-top:58px}.spec-strip,.cards.four,.release-columns{grid-template-columns:repeat(2,1fr)}.cards.three{grid-template-columns:1fr}.footer-inner{grid-template-columns:1fr 1fr}}
@media (min-width:721px) and (max-width:980px){.page-hero h1{line-height:1.2}.section-head h2{line-height:1.15}.applications-hero h1{line-height:1.24}}
@media(max-width:720px){.applications-hero h1{line-height:1.22}.nav{display:none}.menu{display:block}.nav.open{display:grid;position:absolute;top:70px;left:18px;right:18px;padding:18px;background:#081020;border:1px solid var(--line);border-radius:20px}.spec-strip,.cards.four,.release-columns{grid-template-columns:1fr}.metric{min-height:120px}.section{padding:72px 18px}.hero{padding-left:18px;padding-right:18px}.hero h1{font-size:58px}.page-hero h1{font-size:44px;line-height:1.2}.section-head h2{line-height:1.18}.footer-inner{grid-template-columns:1fr}.download-card{display:block}.download-card .btn{margin-top:16px}}

/* =========================================================
   ARMARRAY Contact UI — Dropdown + Modal
   ========================================================= */
button{font:inherit}
.nav .contact-menu{position:relative;display:flex;align-items:center}
.nav .contact-nav-trigger{
  appearance:none;
  -webkit-appearance:none;
  cursor:pointer;
  background:rgba(255,255,255,.015);
  color:var(--text);
  font:inherit;
  line-height:1.2;
  transition:border-color .22s ease,background .22s ease,box-shadow .22s ease,transform .22s ease;
}
.nav .contact-nav-trigger:hover,
.nav .contact-menu.is-open .contact-nav-trigger{
  border-color:rgba(94,231,255,.34);
  background:rgba(94,231,255,.055);
  box-shadow:0 0 0 1px rgba(94,231,255,.06),0 12px 32px rgba(0,0,0,.24);
}
.contact-dropdown{
  position:absolute;
  top:calc(100% + 14px);
  right:0;
  width:286px;
  padding:9px;
  border:1px solid transparent;
  border-radius:22px;
  background:
    linear-gradient(rgba(10,16,32,.94),rgba(7,12,25,.94)) padding-box,
    linear-gradient(135deg,rgba(94,231,255,.42),rgba(117,255,184,.18),rgba(255,255,255,.08)) border-box;
  box-shadow:0 24px 70px rgba(0,0,0,.5),0 0 45px rgba(94,231,255,.05);
  backdrop-filter:blur(22px) saturate(130%);
  -webkit-backdrop-filter:blur(22px) saturate(130%);
  opacity:0;
  visibility:hidden;
  transform:translateY(-7px) scale(.985);
  transform-origin:top right;
  pointer-events:none;
  transition:opacity .18s ease,visibility .18s ease,transform .18s ease;
  z-index:80;
}
.contact-dropdown::before{
  content:"";
  position:absolute;
  top:-15px;
  right:0;
  width:100%;
  height:16px;
}
.contact-menu:hover .contact-dropdown,
.contact-menu:focus-within .contact-dropdown,
.contact-menu.is-open .contact-dropdown{
  opacity:1;
  visibility:visible;
  transform:translateY(0) scale(1);
  pointer-events:auto;
}
.contact-option{
  display:grid;
  grid-template-columns:42px 1fr;
  gap:12px;
  align-items:center;
  min-width:0;
  padding:13px;
  border:1px solid transparent;
  border-radius:15px;
  color:var(--text);
  background:transparent;
  transition:background .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.contact-option:hover,
.contact-option:focus-visible{
  color:var(--text);
  background:rgba(255,255,255,.055);
  border-color:rgba(255,255,255,.08);
  transform:translateY(-1px);
  outline:none;
}
.contact-option strong{display:block;font-size:14px;letter-spacing:-.01em}
.contact-option small{display:block;margin-top:2px;color:var(--muted);font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.contact-icon-wrap{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  color:var(--cyan);background:rgba(94,231,255,.09);border:1px solid rgba(94,231,255,.13);
}
.contact-icon-wrap.whatsapp{
  color:#75ffb8;background:rgba(117,255,184,.085);border-color:rgba(117,255,184,.14);
}
.contact-option-icon{width:21px;height:21px;display:block}
.whatsapp-icon{color:#75ffb8}

/* Modal */
.contact-modal[hidden]{display:none!important}
.contact-modal{position:fixed;inset:0;z-index:200;display:grid;place-items:center;padding:22px}
.contact-modal-backdrop{
  position:absolute;inset:0;background:rgba(2,6,14,.72);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  animation:contactFade .18s ease both;
}
.contact-modal-panel{
  position:relative;
  width:min(560px,100%);
  padding:34px;
  border:1px solid transparent;
  border-radius:30px;
  background:
    linear-gradient(145deg,rgba(15,25,43,.96),rgba(7,12,25,.97)) padding-box,
    linear-gradient(135deg,rgba(94,231,255,.5),rgba(117,255,184,.2),rgba(255,255,255,.08)) border-box;
  box-shadow:0 34px 110px rgba(0,0,0,.62),0 0 70px rgba(94,231,255,.07);
  backdrop-filter:blur(26px) saturate(130%);
  -webkit-backdrop-filter:blur(26px) saturate(130%);
  animation:contactPanel .22s cubic-bezier(.2,.75,.25,1) both;
}
.contact-modal-panel::before{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:radial-gradient(circle at 10% 0%,rgba(94,231,255,.11),transparent 34%),radial-gradient(circle at 88% 12%,rgba(117,255,184,.07),transparent 28%);
}
.contact-modal-panel>*{position:relative}
.contact-modal-panel h2{
  margin:0;
  font-size:clamp(32px,5vw,48px);
  line-height:1.06;
  letter-spacing:-.05em;
}
.contact-modal-copy{margin:16px 0 26px;color:var(--muted);font-size:15px;max-width:470px}
.contact-modal-close{
  position:absolute;top:18px;right:18px;z-index:3;
  width:38px;height:38px;border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);color:var(--soft);cursor:pointer;
  font-size:25px;line-height:1;display:grid;place-items:center;
  transition:background .18s ease,color .18s ease,transform .18s ease,border-color .18s ease;
}
.contact-modal-close:hover{background:rgba(255,255,255,.08);color:var(--text);border-color:rgba(94,231,255,.25);transform:rotate(2deg)}
.contact-modal-options{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.contact-option-large{
  position:relative;
  grid-template-columns:42px minmax(0,1fr) auto;
  padding:16px;
  min-height:84px;
  background:rgba(255,255,255,.035);
  border-color:rgba(255,255,255,.075);
}
.contact-option-large:hover{
  background:rgba(255,255,255,.065);
  border-color:rgba(94,231,255,.17);
  box-shadow:0 14px 34px rgba(0,0,0,.2);
}
.contact-option-arrow{color:var(--muted);font-size:16px}
.contact-modal-trigger{border:0;cursor:pointer}
body.contact-modal-open{overflow:hidden}

@keyframes contactFade{from{opacity:0}to{opacity:1}}
@keyframes contactPanel{from{opacity:0;transform:translateY(14px) scale(.975)}to{opacity:1;transform:translateY(0) scale(1)}}

@media(max-width:720px){
  .nav.open .contact-menu{display:block;width:100%}
  .nav.open .contact-nav-trigger{width:100%;text-align:left;justify-content:flex-start}
  .contact-dropdown{
    position:static;
    width:100%;
    margin-top:10px;
    opacity:0;
    visibility:hidden;
    display:none;
    transform:none;
  }
  .contact-menu:hover .contact-dropdown{display:none}
  .contact-menu.is-open .contact-dropdown,
  .contact-menu:focus-within .contact-dropdown{display:block;opacity:1;visibility:visible}
  .contact-modal{padding:14px}
  .contact-modal-panel{padding:28px 18px 20px;border-radius:24px}
  .contact-modal-panel h2{font-size:34px;padding-right:35px}
  .contact-modal-options{grid-template-columns:1fr}
  .contact-option-large{min-height:76px}
}

/* Footer contact labels */
.footer-contact a{white-space:nowrap}
@media(max-width:720px){.footer-contact a{white-space:normal}}

/* =========================================================
   Applications visual cards — square artwork
   ========================================================= */
.applications-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
}
.application-card{
  min-width:0;
  min-height:0;
  padding:0;
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:transform .28s ease,border-color .28s ease,background .28s ease,box-shadow .28s ease;
}
.application-card-media{
  position:relative;
  width:100%;
  aspect-ratio:1 / 1;
  overflow:hidden;
  flex:0 0 auto;
  background:#080d17;
  border-bottom:1px solid var(--line);
}
.application-card-media img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  max-width:none;
  display:block;
  object-fit:cover;
  object-position:center;
  transition:transform .30s cubic-bezier(.2,.65,.25,1),filter .30s ease;
}
.application-card-body{
  padding:22px 24px 25px;
  flex:1;
}
.application-card-body h3{margin:0 0 11px}
.application-card-body p{margin:0}
@media (hover:hover) and (pointer:fine){
  .application-card:hover{
    transform:translateY(-4px);
    border-color:rgba(94,231,255,.20);
    background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.032));
    box-shadow:0 16px 36px rgba(0,0,0,.20);
  }
  .application-card:hover .application-card-media img{
    transform:scale(1.018);
    filter:brightness(1.025);
  }
}
@media (min-width:721px) and (max-width:980px){
  .applications-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:720px){
  .applications-grid{
    grid-template-columns:1fr;
    gap:16px;
  }
  .application-card{
    width:100%;
  }
  .application-card-media{
    aspect-ratio:1 / 1;
    max-height:none;
  }
  .application-card-body{
    padding:20px 20px 23px;
  }
}
@media (prefers-reduced-motion:reduce){
  .application-card,
  .application-card-media img{transition:none}
  .application-card:hover{transform:none}
  .application-card:hover .application-card-media img{transform:none}
}

/* v2.6 product visual update */
.hero-visual img.product-photo,
.visual-panel img.product-photo{
  filter:drop-shadow(0 30px 50px rgba(0,0,0,.55));
}
.hero-visual.product-hero{
  display:flex;
  align-items:center;
  justify-content:center;
}
.hero-visual.product-hero img{max-height:420px;object-fit:contain}
.solution-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.solution-card{
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:rgba(16,26,44,.72);
  transition:transform .25s ease,border-color .25s ease,background .25s ease;
}
.solution-card:hover{
  transform:translateY(-5px);
  border-color:rgba(94,231,255,.45);
  background:rgba(18,29,49,.9);
}
.solution-card img{
  width:100%;
  aspect-ratio:1/1;
  object-fit:cover;
  transition:transform .3s ease;
}
.solution-card:hover img{transform:scale(1.02)}
.solution-card .content{padding:22px}
.hardware-showcase{
 display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center
}
.gallery{
 display:flex;flex-direction:column;gap:16px
}
.gallery-main img{
 width:100%;aspect-ratio:4/3;object-fit:contain;
 background:rgba(255,255,255,.03);border-radius:24px;
}
.gallery-thumbs{display:flex;gap:12px;flex-wrap:wrap}
.gallery-thumbs button{
 border:1px solid var(--line);background:var(--card);padding:0;border-radius:14px;overflow:hidden;cursor:pointer;
}
.gallery-thumbs img{width:90px;height:70px;object-fit:cover}
@media(max-width:900px){
 .solution-grid{grid-template-columns:repeat(2,1fr)}
 .hardware-showcase{grid-template-columns:1fr}
}
@media(max-width:600px){
 .solution-grid{grid-template-columns:1fr}
 .gallery-thumbs img{width:72px;height:56px}
}

/* Homepage Solutions Fade Carousel */
.solutions-carousel{
  max-width:1200px;
  margin:0 auto;
  overflow:hidden;
  position:relative;
}
.solutions-slide{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
  opacity:0;
  position:absolute;
  inset:0;
  transition:opacity .65s ease;
  pointer-events:none;
}
.solutions-slide.active{
  opacity:1;
  position:relative;
  pointer-events:auto;
}
.solution-slide-card{
  position:relative;
  aspect-ratio:1/1;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--panel);
  display:block;
}
.solution-slide-card img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .3s ease,filter .3s ease;
}
.solution-slide-card:hover img{transform:scale(1.02);filter:brightness(1.08)}
.solution-overlay{
  position:absolute;
  inset:auto 0 0;
  padding:70px 22px 22px;
  background:linear-gradient(transparent,rgba(0,0,0,.85));
}
.solution-overlay h3{margin:0 0 8px;font-size:1.15rem}
.solution-overlay p{margin:0;color:#c8d5e8;font-size:.95rem}

@media(max-width:1023px){
 .solutions-carousel{max-width:100%}
 .solutions-slide{
   grid-template-columns:1fr;
 }
 .solutions-slide:not(.active) .solution-slide-card{display:none}
 .solution-slide-card{aspect-ratio:1/1}
}

/* Chassis overflow protection */
.hardware-showcase,
.hardware-showcase > div{
  min-width:0;
}
.hardware-showcase .visual-panel{
  overflow:hidden;
}
.hardware-showcase .product-photo{
  width:100%;
  max-width:520px;
  margin:0 auto;
  object-fit:contain;
}

@media(max-width:1023px){
 .hardware-showcase{
   grid-template-columns:1fr;
 }
}

/* Precision refinement */
.hardware-showcase,
.chassis-hardware-card,
.modular-architecture-card{
  width:100%;
  max-width:1180px;
  margin-left:auto;
  margin-right:auto;
  box-sizing:border-box;
}

.hardware-showcase{
  overflow:hidden;
}

.hardware-showcase .visual-panel{
  width:100%;
  max-width:100%;
}

.hardware-showcase .product-photo{
  max-width:100%;
  width:100%;
}

.solution-slide-card{
  border-radius:var(--radius);
}

.solution-slide-card.active-indicator::after{
  content:"";
  position:absolute;
  inset:0;
  border-radius:var(--radius);
  padding:2px;
  background:linear-gradient(225deg,transparent 58%,#00F5A0 82%,#00D8F6 100%);
  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;
  mask-composite:exclude;
  pointer-events:none;
  z-index:6;
  animation:borderGlowSync 5s linear infinite;
}

@keyframes borderGlowSync{
  0%,100%{
    opacity:.55;
    filter:drop-shadow(0 0 5px rgba(0,245,160,.55));
  }
  50%{
    opacity:1;
    filter:drop-shadow(0 0 12px rgba(0,216,246,.85));
  }
}

.contact-nav-trigger.pulse-attention{
  animation:contactPulse 2.8s infinite;
}

@keyframes contactPulse{
  0%,100%{
    transform:scale(1);
    box-shadow:0 0 0 0 rgba(6,214,246,0);
  }
  50%{
    transform:scale(1.03);
    box-shadow:0 0 12px rgba(6,214,246,.45),0 0 20px rgba(16,185,129,.25);
  }
}

.contact-nav-trigger:hover{
  animation-play-state:paused;
}

/* =========================================================
   Navbar Active State (Fixed Pill Indicator)
   ========================================================= */
.nav > a,
.nav-link {
  position: relative;
}

/* 定义标准的亮色胶囊下划线 */
.nav > a::after,
.nav-link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -8px;
  width: 22px !important;
  height: 4px !important;
  border-radius: 999px !important;
  background: linear-gradient(90deg, var(--green), var(--cyan)) !important;
  box-shadow: 0 0 10px rgba(94, 231, 255, 0.4);
  transform: translateX(-50%) scale(0);
  transform-origin: center;
  opacity: 0;
  transition: transform 0.28s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.2s ease;
}

/* 激活态（同时覆盖 HTML 中 class 加在 a 或 nav-link 上的情况） */
.nav > a.active::after,
.nav-link.active::after {
  transform: translateX(-50%) scale(1);
  opacity: 1;
}