:root{
  --sq-lamp:#0B5B3A;
  --sq-space:#071A2B;
  --sq-orange:#FF6B1A;
  --sq-cyan:#2CF2D2;
  --sq-warm:#F7F3E8;
  --sq-stand:#9AA7A0;
  --sq-grass:#39C46E;
  --sq-yellow:#FFD166;
  --sq-shadow:#123B2A;
  --sq-mint:#E8F8F1;

  --sq-font-display:"Barlow Condensed","HarmonyOS Sans SC","Noto Sans SC","Arial Narrow",system-ui,"PingFang SC","Microsoft YaHei",sans-serif;
  --sq-font-body:"Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --sq-font-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --sq-wrap:1280px;
  --sq-gutter:clamp(18px,4vw,48px);
  --sq-ease:cubic-bezier(.22,.61,.36,1);
  --sq-hair:rgba(7,26,43,.14);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--sq-font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--sq-space);
  background:var(--sq-warm);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,p,figure,blockquote{margin:0;}
img,svg{max-width:100%;height:auto;}
a{color:inherit;}
button{font:inherit;color:inherit;}
[hidden]{display:none !important;}

h1,h2,h3{font-family:var(--sq-font-display);font-weight:800;font-stretch:condensed;line-height:1.06;letter-spacing:-.015em;}
h1{font-size:clamp(2.4rem,5.6vw,4.4rem);}
h2{font-size:clamp(1.75rem,3.4vw,2.6rem);}
h3{font-size:clamp(1.2rem,2vw,1.5rem);letter-spacing:-.005em;}
h4{font-family:var(--sq-font-body);font-size:1.05rem;font-weight:700;line-height:1.5;}

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

.sq-container{width:100%;max-width:var(--sq-wrap);margin-inline:auto;padding-inline:var(--sq-gutter);}
.sq-mono{font-family:var(--sq-font-mono);font-size:12.5px;letter-spacing:.06em;font-weight:500;}
.sq-sr{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

/* ---------- skip link ---------- */
.sq-skip{
  position:fixed;top:10px;left:10px;z-index:220;
  transform:translateY(-180%);
  background:var(--sq-cyan);color:var(--sq-space);
  padding:10px 16px;border-radius:2px;
  font-family:var(--sq-font-mono);font-size:13px;letter-spacing:.06em;
  text-decoration:none;
  transition:transform .18s var(--sq-ease);
}
.sq-skip:focus,.sq-skip:focus-visible{transform:none;}

/* ---------- header shell ---------- */
.sq-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,26,43,.94);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  backdrop-filter:blur(14px) saturate(150%);
  color:var(--sq-warm);
  border-bottom:1px solid rgba(44,242,210,.26);
}

.sq-topline{
  background:var(--sq-lamp);
  color:var(--sq-warm);
  overflow:hidden;
  max-height:44px;
  transition:max-height .22s var(--sq-ease),opacity .18s var(--sq-ease);
}
.sq-header[data-compact] .sq-topline{max-height:0;opacity:0;}
.sq-topline__inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:36px;flex-wrap:wrap;
}
.sq-topline__live{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--sq-font-mono);font-size:12px;letter-spacing:.07em;
  color:rgba(247,243,232,.9);
}
.sq-dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--sq-grass);
  box-shadow:0 0 0 3px rgba(57,196,110,.22);
  animation:sq-pulse 3.4s var(--sq-ease) infinite;
}
.sq-topline__links{display:inline-flex;align-items:center;gap:14px;}
.sq-badge{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--sq-font-mono);font-size:11.5px;letter-spacing:.09em;
  padding:3px 8px;
  border:1px solid rgba(44,242,210,.5);
  border-radius:2px;
  color:var(--sq-cyan);
  background:rgba(7,26,43,.24);
}
.sq-badge__dot{
  width:5px;height:5px;border-radius:50%;
  background:var(--sq-cyan);
  animation:sq-pulse 2.8s var(--sq-ease) infinite;
}
.sq-topline__link{
  font-family:var(--sq-font-mono);font-size:12px;letter-spacing:.07em;
  color:var(--sq-yellow);text-decoration:none;
  padding-bottom:2px;
  border-bottom:1px solid rgba(255,209,102,.55);
  transition:color .18s var(--sq-ease),border-color .18s var(--sq-ease);
}
.sq-topline__link:hover{color:var(--sq-warm);border-color:var(--sq-warm);}

.sq-bar{position:relative;}
.sq-bar__inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:minmax(0,1fr) auto;
  align-items:center;gap:clamp(14px,2.6vw,36px);
  min-height:76px;
  transition:min-height .22s var(--sq-ease);
}
.sq-header[data-compact] .sq-bar__inner{min-height:62px;}

/* nav rail */
.sq-nav__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:2px;
  list-style:none;margin:0;padding:0;
}
.sq-nav__link{
  display:inline-flex;align-items:center;
  min-height:38px;padding:0 12px;
  font-size:15px;font-weight:500;letter-spacing:.01em;
  color:rgba(247,243,232,.82);
  text-decoration:none;
  border:1px solid transparent;border-radius:2px;
  transition:color .18s var(--sq-ease),background .18s var(--sq-ease),border-color .18s var(--sq-ease),transform .18s var(--sq-ease);
}
.sq-nav__link:hover{
  color:var(--sq-warm);
  background:rgba(44,242,210,.12);
  border-color:rgba(44,242,210,.45);
  transform:translateY(-1px);
}
.sq-nav__link[aria-current="page"]{
  background:var(--sq-cyan);
  color:var(--sq-space);
  border-color:var(--sq-cyan);
  font-weight:700;
}

/* brand block */
.sq-brand{
  display:inline-flex;align-items:center;gap:11px;
  text-decoration:none;color:var(--sq-warm);
  justify-self:end;
}
.sq-brand__mark{
  width:28px;height:28px;flex:none;
  background:linear-gradient(135deg,var(--sq-cyan) 0 54%,var(--sq-orange) 54% 100%);
  clip-path:polygon(0 0,100% 0,100% 74%,74% 100%,0 100%);
}
.sq-brand__text{display:flex;flex-direction:column;line-height:1.15;}
.sq-brand__name{
  font-family:var(--sq-font-display);
  font-size:22px;font-weight:800;font-stretch:condensed;
  letter-spacing:-.01em;
}
.sq-brand__desc{color:var(--sq-stand);font-size:11px;letter-spacing:.08em;margin-top:2px;}

/* mobile toggle */
.sq-navtoggle{
  display:none;align-items:center;gap:9px;
  background:rgba(44,242,210,.08);
  border:1px solid rgba(44,242,210,.45);
  color:var(--sq-warm);
  padding:9px 13px;border-radius:2px;cursor:pointer;
  font-family:var(--sq-font-mono);font-size:12px;letter-spacing:.08em;
  transition:background .18s var(--sq-ease),border-color .18s var(--sq-ease);
}
.sq-navtoggle:hover{background:rgba(44,242,210,.18);border-color:var(--sq-cyan);}
.sq-navtoggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:16px;}
.sq-navtoggle__bars i{display:block;height:2px;background:currentColor;transition:transform .2s var(--sq-ease);}
.sq-header[data-open] .sq-navtoggle__bars i:first-child{transform:translateY(3px) rotate(45deg);}
.sq-header[data-open] .sq-navtoggle__bars i:last-child{transform:translateY(-3px) rotate(-45deg);}

/* progress + scrim */
.sq-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  z-index:5;pointer-events:none;background:transparent;
}
.sq-progress__bar{
  display:block;height:100%;width:100%;
  background:linear-gradient(90deg,var(--sq-cyan),var(--sq-orange));
  transform:scaleX(0);transform-origin:0 50%;
}
.sq-scrim{
  position:fixed;inset:0;z-index:1;
  background:rgba(7,26,43,.68);
  border:0;padding:0;cursor:pointer;
}
@media (min-width:901px){.sq-scrim{display:none !important;}}

@media (max-width:1080px){
  .sq-nav__link{font-size:14px;padding:0 9px;}
  .sq-brand__name{font-size:20px;}
}

@media (max-width:900px){
  .sq-navtoggle{display:inline-flex;}
  .sq-bar__inner{grid-template-columns:auto minmax(0,1fr);min-height:64px;gap:14px;}
  .sq-brand{justify-self:end;}
  .sq-nav{
    position:fixed;top:0;left:0;bottom:0;
    width:min(320px,86vw);
    padding:calc(84px + 16px) 16px 32px;
    background:rgba(7,26,43,.97);
    -webkit-backdrop-filter:blur(16px);
    backdrop-filter:blur(16px);
    border-right:1px solid rgba(44,242,210,.38);
    box-shadow:26px 0 60px rgba(0,0,0,.45);
    overflow-y:auto;
    z-index:3;
    transform:translateX(-103%);
    visibility:hidden;
    transition:transform .26s var(--sq-ease),visibility 0s linear .26s;
  }
  .sq-nav__list{flex-direction:column;align-items:stretch;gap:2px;}
  .sq-nav__link{
    min-height:50px;padding:0 14px;
    font-size:16px;border-radius:0;
    border-bottom:1px solid rgba(247,243,232,.12);
  }
  .sq-nav__link:hover{transform:none;}
  .sq-header[data-open] .sq-nav{
    transform:none;visibility:visible;
    transition:transform .26s var(--sq-ease),visibility 0s;
  }
  .sq-topline__inner{min-height:32px;}
  .sq-topline__live{font-size:11px;letter-spacing:.05em;}
}

@media (max-width:520px){
  .sq-brand__desc{display:none;}
  .sq-brand__name{font-size:19px;}
  .sq-topline__live{max-width:52%;}
  .sq-topline__links{gap:10px;}
}

/* ---------- footer ---------- */
.sq-footer{
  position:relative;
  margin-top:0;
  padding-top:clamp(40px,6vw,74px);
  background:linear-gradient(180deg,var(--sq-space) 0%,#0a2436 58%,var(--sq-shadow) 100%);
  color:var(--sq-warm);
  overflow:hidden;
}
.sq-footer::before{
  content:"";position:absolute;inset:0 0 auto 0;height:4px;
  background:linear-gradient(90deg,var(--sq-lamp) 0%,var(--sq-cyan) 46%,var(--sq-orange) 100%);
}
.sq-footer::after{
  content:"";position:absolute;right:-12%;top:12%;width:56%;height:120%;
  background:repeating-linear-gradient(114deg,rgba(44,242,210,.09) 0 2px,transparent 2px 26px);
  pointer-events:none;
}
.sq-footer__top{
  position:relative;z-index:1;
  display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1.9fr);
  gap:clamp(28px,4vw,64px);
  padding-bottom:clamp(30px,4vw,52px);
  border-bottom:1px solid rgba(247,243,232,.16);
}
.sq-footer__brandline{
  font-family:var(--sq-font-display);
  font-size:clamp(1.3rem,2.4vw,1.7rem);font-weight:800;font-stretch:condensed;
  letter-spacing:-.01em;
}
.sq-footer__desc{
  margin-top:10px;max-width:36ch;
  color:rgba(247,243,232,.74);font-size:15.5px;line-height:1.7;
}
.sq-footer__contact{list-style:none;margin:22px 0 0;padding:0;display:grid;gap:8px;}
.sq-footer__contactitem{
  display:flex;flex-wrap:wrap;gap:10px;align-items:baseline;
  font-size:14.5px;color:rgba(247,243,232,.88);
  word-break:break-word;
}
.sq-footer__label{
  color:var(--sq-cyan);font-size:11px;letter-spacing:.14em;
  min-width:34px;
}
.sq-footer__note{
  margin-top:16px;max-width:44ch;
  font-size:12.5px;line-height:1.7;color:rgba(154,167,160,.95);
}
.sq-footer__nav{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,3vw,36px);
}
.sq-footer__coltitle{
  color:var(--sq-yellow);font-size:11px;letter-spacing:.16em;
  padding-bottom:10px;margin-bottom:12px;
  border-bottom:1px solid rgba(247,243,232,.14);
}
.sq-footer__list{list-style:none;margin:0;padding:0;display:grid;gap:9px;}
.sq-footer__list a{
  display:inline-block;
  color:rgba(247,243,232,.82);
  font-size:15px;text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--sq-ease),border-color .18s var(--sq-ease),transform .18s var(--sq-ease);
}
.sq-footer__list a:hover{
  color:var(--sq-cyan);
  border-color:rgba(44,242,210,.65);
  transform:translateX(2px);
}
.sq-footer__meta{
  position:relative;z-index:1;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px 24px;
  padding-block:22px 26px;
}
.sq-footer__legal{
  font-family:var(--sq-font-mono);font-size:12px;letter-spacing:.05em;
  color:rgba(247,243,232,.66);
  display:inline-flex;flex-wrap:wrap;gap:14px;
}
.sq-footer__legal a{color:rgba(247,243,232,.66);text-decoration:none;transition:color .18s var(--sq-ease);}
.sq-footer__legal a:hover{color:var(--sq-cyan);}
.sq-footer__icp{color:rgba(154,167,160,.9);font-size:12px;}

@media (max-width:840px){
  .sq-footer__top{grid-template-columns:1fr;}
  .sq-footer__nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px 18px;}
  .sq-footer__meta{flex-direction:column;align-items:flex-start;}
}
@media (max-width:420px){
  .sq-footer__nav{grid-template-columns:1fr;}
}

/* ---------- shared content components ---------- */
.sq-section{padding-block:clamp(46px,7vw,96px);position:relative;}
.sq-section__head{max-width:60ch;margin-bottom:clamp(24px,3.4vw,40px);}
.sq-eyebrow{
  display:inline-block;
  font-family:var(--sq-font-mono);font-size:12px;letter-spacing:.16em;
  color:var(--sq-lamp);
  padding-bottom:6px;margin-bottom:12px;
  border-bottom:2px solid var(--sq-cyan);
}
.sq-prose{max-width:68ch;font-size:17.5px;line-height:1.78;}
.sq-prose p + p{margin-top:1.05em;}
.sq-prose h3{margin-top:1.6em;margin-bottom:.5em;}

.sq-grid{
  display:grid;grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2.4vw,32px);
}
@media (max-width:760px){
  .sq-grid{grid-template-columns:minmax(0,1fr);}
}

.sq-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;
  font-family:var(--sq-font-body);font-size:15px;font-weight:600;letter-spacing:.02em;
  text-decoration:none;border-radius:2px;border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s var(--sq-ease),background .18s var(--sq-ease),border-color .18s var(--sq-ease),color .18s var(--sq-ease),box-shadow .18s var(--sq-ease);
}
.sq-btn--accent{background:var(--sq-orange);color:var(--sq-space);}
.sq-btn--accent:hover{transform:translateY(-2px);box-shadow:0 8px 0 -4px rgba(255,107,26,.35);}
.sq-btn--ghost{background:transparent;color:var(--sq-space);border-color:rgba(7,26,43,.32);}
.sq-btn--ghost:hover{transform:translateY(-2px);border-color:var(--sq-lamp);color:var(--sq-lamp);}
.sq-btn--cyan{background:transparent;color:var(--sq-cyan);border-color:rgba(44,242,210,.6);}
.sq-btn--cyan:hover{transform:translateY(-2px);background:rgba(44,242,210,.12);border-color:var(--sq-cyan);}

.sq-crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--sq-font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--sq-stand);
}
.sq-crumbs__link{color:inherit;text-decoration:none;transition:color .18s var(--sq-ease);}
.sq-crumbs__link:hover{color:var(--sq-lamp);}
.sq-crumbs__sep{color:rgba(154,167,160,.6);}

.sq-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:2px;
  font-family:var(--sq-font-mono);font-size:11.5px;letter-spacing:.08em;
  color:var(--sq-lamp);
  background:var(--sq-mint);
  border:1px solid rgba(11,91,58,.2);
}

.sq-card{
  background:#fff;
  padding:clamp(20px,3vw,32px);
  border-left:3px solid var(--sq-cyan);
  border-radius:2px;
}

.sq-rule{border:0;height:1px;background:var(--sq-hair);margin-block:clamp(24px,4vw,44px);}

/* media placeholders */
.sq-media{
  position:relative;display:block;overflow:hidden;
  background:linear-gradient(150deg,var(--sq-shadow) 0%,var(--sq-space) 52%,#0e3247 100%);
  border-radius:2px;
}
.sq-media img{display:block;width:100%;height:100%;object-fit:cover;}
.sq-media--wide{aspect-ratio:16/9;}
.sq-media--tall{aspect-ratio:3/4;}
.sq-media--square{aspect-ratio:1/1;}
.sq-media::after{
  content:"";position:absolute;inset:auto 0 0 0;height:42%;
  background:linear-gradient(180deg,transparent,rgba(7,26,43,.55));
  pointer-events:none;
}
@media (max-width:560px){
  .sq-media--wide{aspect-ratio:4/3;}
}

/* accordion */
.sq-accordion{border-top:1px solid var(--sq-hair);}
.sq-accordion__item{border-bottom:1px solid var(--sq-hair);}
.sq-accordion__trigger{
  display:flex;width:100%;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 2px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:1.02rem;font-weight:600;line-height:1.5;color:var(--sq-space);
  transition:color .18s var(--sq-ease);
}
.sq-accordion__trigger:hover{color:var(--sq-lamp);}
.sq-accordion__trigger::after{
  content:"";flex:none;width:9px;height:9px;
  border-right:2px solid var(--sq-lamp);
  border-bottom:2px solid var(--sq-lamp);
  transform:rotate(45deg) translateY(-2px);
  transition:transform .22s var(--sq-ease),border-color .18s var(--sq-ease);
}
.sq-accordion__item[data-open] .sq-accordion__trigger{color:var(--sq-lamp);}
.sq-accordion__item[data-open] .sq-accordion__trigger::after{transform:rotate(-135deg) translateY(-2px);border-color:var(--sq-orange);}
.sq-accordion__panel{
  display:grid;grid-template-rows:0fr;
  transition:grid-template-rows .26s var(--sq-ease);
}
.sq-accordion__item[data-open] .sq-accordion__panel{grid-template-rows:1fr;}
.sq-accordion__inner{overflow:hidden;min-height:0;font-size:16px;line-height:1.78;color:rgba(7,26,43,.82);}
.sq-accordion__inner > *:first-child{margin-top:0;padding-top:0;}
.sq-accordion__inner > *:last-child{margin-bottom:18px;}

/* filter */
.sq-filter{display:flex;flex-wrap:wrap;gap:8px;}
.sq-filter__btn{
  display:inline-flex;align-items:center;
  min-height:38px;padding:0 15px;
  background:transparent;
  border:1px solid rgba(7,26,43,.22);
  border-radius:2px;
  font-family:var(--sq-font-mono);font-size:12.5px;letter-spacing:.07em;
  color:rgba(7,26,43,.78);
  cursor:pointer;
  transition:background .18s var(--sq-ease),color .18s var(--sq-ease),border-color .18s var(--sq-ease),transform .18s var(--sq-ease);
}
.sq-filter__btn:hover{border-color:var(--sq-lamp);color:var(--sq-lamp);transform:translateY(-1px);}
.sq-filter__btn[aria-pressed="true"]{background:var(--sq-lamp);border-color:var(--sq-lamp);color:var(--sq-warm);font-weight:600;}

/* reveal + bands */
[data-reveal]{
  opacity:0;transform:translateY(14px);
  transition:opacity .5s var(--sq-ease),transform .5s var(--sq-ease);
}
[data-reveal].is-visible{opacity:1;transform:none;}

.sq-band{position:relative;}
.sq-band--warm{background:var(--sq-warm);color:var(--sq-space);}
.sq-band--mint{background:var(--sq-mint);color:var(--sq-space);}
.sq-band--lamp{background:var(--sq-lamp);color:var(--sq-warm);}
.sq-band--space{background:var(--sq-space);color:var(--sq-warm);}
.sq-band--lamp .sq-eyebrow,.sq-band--space .sq-eyebrow{color:var(--sq-cyan);border-bottom-color:var(--sq-orange);}
.sq-band--lamp .sq-btn--ghost,.sq-band--space .sq-btn--ghost{color:var(--sq-warm);border-color:rgba(247,243,232,.4);}

@keyframes sq-pulse{
  0%,100%{opacity:.4;transform:scale(.8);}
  50%{opacity:1;transform:scale(1);}
}

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