:root{
  --ink-950:#040912;
  --ink-900:#071120;
  --ink-850:#0B1A2E;
  --ink-800:#102441;
  --grid-line:#1C3550;
  --rule:#2B4664;
  --lake:#14B8B0;
  --lake-soft:#7DE7DF;
  --yellow:#F6C744;
  --score:#45FF8A;
  --text:#EDF5FF;
  --text-dim:#A9BBD3;
  --font-head:"Oswald","Barlow Condensed","Arial Narrow","Noto Sans SC","PingFang SC",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",Consolas,"Noto Sans SC",monospace;
  --shell:1240px;
  --gutter:clamp(16px,3.2vw,32px);
  --header-h:64px;
  --ease:cubic-bezier(.2,.8,.2,1);
  --dur:180ms;
  --dur-slow:280ms;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
h1,h2,h3,h4{font-family:var(--font-head);font-weight:700;line-height:1.12;letter-spacing:-.01em}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}

body{
  min-height:100vh;
  background-color:var(--ink-900);
  background-image:
    linear-gradient(rgba(28,53,80,.34) 1px,transparent 1px),
    linear-gradient(90deg,rgba(28,53,80,.34) 1px,transparent 1px),
    radial-gradient(120% 90% at 50% -20%,rgba(20,184,176,.13),transparent 62%);
  background-size:96px 96px,96px 96px,100% 100%;
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
main{display:block}
#main-content{scroll-margin-top:calc(var(--header-h) + 16px)}
::selection{background:var(--lake);color:#031B1A}

:focus-visible{outline:2px solid var(--lake-soft);outline-offset:2px}
a:focus-visible,button:focus-visible{outline:2px solid var(--lake-soft);outline-offset:2px}

.skip-link{
  position:fixed;left:12px;top:-120px;z-index:200;
  background:var(--yellow);color:#1A1204;
  padding:10px 16px;font-weight:700;font-size:14px;letter-spacing:.04em;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:12px}

.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;
}

/* ---------- layout ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.shell--narrow{max-width:820px}

.grid{display:grid;gap:clamp(12px,1.8vw,20px)}
.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))}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,5fr);align-items:start}
.stack{display:grid;gap:16px}
.cluster{display:flex;flex-wrap:wrap;gap:10px;align-items:center}

/* ---------- page heading ---------- */
.page-head{
  padding-block:clamp(28px,5vw,56px) clamp(20px,3vw,34px);
  border-bottom:1px solid var(--grid-line);
}
.kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-num);font-size:11.5px;letter-spacing:.18em;
  color:var(--lake-soft);text-transform:uppercase;
}
.kicker::before{content:"";width:22px;height:1px;background:var(--lake)}
.page-title{font-size:clamp(30px,5vw,56px);line-height:1.04;letter-spacing:-.02em;margin-top:12px}
.lede{max-width:64ch;margin-top:14px;font-size:clamp(15px,1.6vw,17px);color:var(--text-dim)}

.section{padding-block:clamp(32px,5vw,64px)}
.section--tight{padding-block:clamp(20px,3vw,36px)}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:16px;flex-wrap:wrap;
  padding-bottom:12px;margin-bottom:clamp(16px,2.5vw,28px);
  border-bottom:1px solid var(--grid-line);
}
.section-title{font-size:clamp(22px,3vw,32px);letter-spacing:-.01em}
.section-note{font-family:var(--font-num);font-size:12.5px;letter-spacing:.06em;color:var(--text-dim)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  min-height:44px;padding:.68em 1.15em;
  font-family:var(--font-head);font-weight:600;font-size:14px;letter-spacing:.06em;
  text-align:center;color:var(--text);
  border:1px solid var(--rule);background:transparent;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn--primary{
  background:var(--yellow);border-color:var(--yellow);color:#1A1204;
  box-shadow:0 10px 26px -18px rgba(246,199,68,.95);
}
.btn--primary:hover,.btn--primary:focus-visible{background:#FFD75E;border-color:#FFD75E;color:#1A1204}
.btn--primary:active{transform:translateY(1px)}
.btn--ghost{color:var(--lake-soft);border-color:rgba(20,184,176,.55);background:rgba(20,184,176,.08)}
.btn--ghost:hover,.btn--ghost:focus-visible{background:rgba(20,184,176,.18);color:#fff;border-color:var(--lake)}
.btn--quiet{border-color:transparent;color:var(--text-dim)}
.btn--quiet:hover,.btn--quiet:focus-visible{color:var(--text);border-color:var(--rule)}
.btn--sm{min-height:36px;padding:.42em .85em;font-size:12.5px;letter-spacing:.05em}
.btn--block{width:100%}

/* ---------- panels / tags / numerals ---------- */
.panel{
  position:relative;
  background:linear-gradient(180deg,rgba(11,26,46,.95),rgba(7,17,32,.95));
  border:1px solid var(--grid-line);
  padding:clamp(14px,2vw,22px);
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.panel::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,var(--lake),rgba(20,184,176,0) 65%);
  opacity:0;transition:opacity var(--dur) var(--ease);
}
.panel:hover{border-color:var(--rule);transform:translateY(-2px)}
.panel:hover::before{opacity:1}
.panel--flat:hover{transform:none}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 8px;border:1px solid var(--rule);
  background:rgba(11,26,46,.7);
  font-family:var(--font-num);font-size:11px;letter-spacing:.09em;
  color:var(--text-dim);
}
.tag--lake{background:var(--lake);border-color:var(--lake);color:#031B1A}
.tag--yellow{background:var(--yellow);border-color:var(--yellow);color:#1A1204}
.tag--score{background:var(--score);border-color:var(--score);color:#02240F}

.score-num{
  font-family:var(--font-num);font-weight:700;line-height:.95;
  color:var(--score);font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.status-dot{display:inline-block;width:7px;height:7px;background:var(--score);vertical-align:middle}
.rule{border:0;border-top:1px solid var(--grid-line);margin:0}

/* ---------- breadcrumbs ---------- */
.breadcrumbs{padding-block:14px;font-size:12.5px}
.breadcrumbs ol{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-num);letter-spacing:.05em;color:var(--text-dim);
}
.breadcrumbs li{display:inline-flex;align-items:center;gap:8px}
.breadcrumbs li+li::before{content:"/";color:var(--rule)}
.breadcrumbs a{color:var(--text-dim)}
.breadcrumbs a:hover{color:var(--lake-soft)}
.breadcrumbs [aria-current="page"]{color:var(--text)}

/* ---------- image frames ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;
  border:1px solid var(--grid-line);
  background:linear-gradient(135deg,#0B1A2E,#071120 55%,#0A2030);
  isolation:isolate;
}
.media-frame::after{
  content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
  background-image:
    linear-gradient(rgba(28,53,80,.5) 1px,transparent 1px),
    linear-gradient(90deg,rgba(28,53,80,.5) 1px,transparent 1px);
  background-size:28px 28px;opacity:.32;
}
.media-frame img{width:100%;height:100%;object-fit:cover;filter:saturate(.92) contrast(1.05) brightness(.92)}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--phone{aspect-ratio:9/19.5;max-width:320px}
.media-frame__caption{
  position:absolute;left:0;bottom:0;z-index:3;
  padding:5px 9px;
  background:rgba(4,9,18,.84);
  border-top:1px solid var(--rule);border-right:1px solid var(--rule);
  font-family:var(--font-num);font-size:11px;letter-spacing:.09em;color:var(--lake-soft);
}

/* ---------- accordion base ---------- */
.acc{display:grid;gap:8px}
.acc-item{
  border:1px solid var(--grid-line);
  background:rgba(11,26,46,.65);
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.acc-item:hover{border-color:var(--rule)}
.acc-item[data-open]{border-color:rgba(20,184,176,.6);background:rgba(11,26,46,.96)}
.acc-trigger{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  width:100%;min-height:48px;padding:14px 16px;text-align:left;
  font-family:var(--font-head);font-weight:600;font-size:16px;letter-spacing:.01em;
  color:var(--text);
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.acc-trigger:hover{background:rgba(20,184,176,.08)}
.acc-trigger[aria-expanded="true"]{color:var(--lake-soft)}
.acc-icon{position:relative;flex:0 0 auto;width:14px;height:14px}
.acc-icon::before,.acc-icon::after{
  content:"";position:absolute;background:var(--lake);
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.acc-icon::before{left:0;top:6px;width:14px;height:2px}
.acc-icon::after{left:6px;top:0;width:2px;height:14px}
.acc-trigger[aria-expanded="true"] .acc-icon::after{transform:rotate(90deg);opacity:0}
.acc-panel{max-height:0;overflow:hidden;transition:max-height var(--dur-slow) var(--ease)}
.acc-inner{padding:0 16px 16px;font-size:14.5px;color:var(--text-dim)}
.acc-inner p+p{margin-top:10px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  color:var(--text);
  background:rgba(4,9,18,.93);
  border-bottom:1px solid var(--grid-line);
  -webkit-backdrop-filter:saturate(140%) blur(12px);
  backdrop-filter:saturate(140%) blur(12px);
}
.header-shell{
  position:relative;
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  gap:clamp(12px,2vw,26px);
  min-height:var(--header-h);
}
.brand{display:flex;align-items:center;gap:10px;min-height:44px;color:var(--text)}
.brand-mark{
  position:relative;flex:0 0 auto;width:9px;height:26px;
  background:linear-gradient(180deg,var(--lake) 0 15px,var(--grid-line) 15px 100%);
}
.brand-mark::after{content:"";position:absolute;left:0;top:0;width:100%;height:4px;background:var(--yellow)}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-name{font-family:var(--font-head);font-weight:700;font-size:17px;letter-spacing:.09em}
.brand-descriptor{margin-top:4px;font-size:10.5px;letter-spacing:.14em;color:var(--text-dim);white-space:nowrap}

.primary-nav{display:flex;justify-content:center;min-width:0}
.nav-list{display:flex;align-items:center;gap:2px;counter-reset:navidx}
.nav-list a{
  display:inline-flex;align-items:center;gap:.45em;
  padding:9px 10px;border:1px solid transparent;
  font-size:13.5px;line-height:1.2;letter-spacing:.04em;
  color:var(--text-dim);white-space:nowrap;
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.nav-list a::before{
  counter-increment:navidx;
  content:counter(navidx,decimal-leading-zero);
  font-family:var(--font-num);font-size:10px;letter-spacing:0;
  color:var(--lake);opacity:.75;
}
.nav-list a:hover,.nav-list a:focus-visible{
  color:var(--text);background:rgba(20,184,176,.10);border-color:rgba(20,184,176,.35);
}
.nav-list a[aria-current="page"]{
  color:#fff;background:rgba(20,184,176,.16);
  border-color:rgba(20,184,176,.55);
  box-shadow:inset 0 -2px 0 var(--lake);
}
.nav-list a[aria-current="page"]::before{color:var(--lake-soft);opacity:1}

.header-tools{display:flex;align-items:center;gap:10px}
.round-status{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 10px;
  border:1px solid var(--grid-line);background:rgba(11,26,46,.85);
  font-family:var(--font-num);font-size:11.5px;letter-spacing:.06em;
  color:var(--text-dim);white-space:nowrap;
}
.round-status__dot{
  width:7px;height:7px;flex:0 0 auto;background:var(--score);
  animation:pulse-dot 2.4s var(--ease) infinite;
}
@keyframes pulse-dot{
  0%{box-shadow:0 0 0 0 rgba(69,255,138,.55)}
  70%{box-shadow:0 0 0 8px rgba(69,255,138,0)}
  100%{box-shadow:0 0 0 0 rgba(69,255,138,0)}
}

.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:40px;
  border:1px solid var(--rule);background:var(--ink-850);color:var(--text);
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--lake);background:rgba(20,184,176,.14)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:2px;background:var(--text);transition:background var(--dur) var(--ease)}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);
  transition:transform var(--dur) var(--ease),top var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.site-header[data-open] .nav-toggle__bars{background:transparent}
.site-header[data-open] .nav-toggle__bars::before{top:0;transform:rotate(45deg);background:var(--yellow)}
.site-header[data-open] .nav-toggle__bars::after{top:0;transform:rotate(-45deg);background:var(--yellow)}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:linear-gradient(90deg,var(--lake),var(--score));
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform 90ms linear;
  pointer-events:none;
}

/* ---------- footer ---------- */
.site-footer{
  margin-top:clamp(48px,8vw,96px);
  background:var(--ink-950);
  border-top:1px solid var(--grid-line);
  color:var(--text-dim);font-size:14px;
}
.footer-shell{padding-block:clamp(36px,5vw,64px) 0}
.footer-top{
  display:grid;
  grid-template-columns:minmax(220px,1fr) minmax(0,1.6fr) minmax(220px,1fr);
  gap:clamp(28px,4vw,48px);
  padding-bottom:clamp(28px,4vw,48px);
}
.footer-brand{display:flex;flex-direction:column;gap:16px;align-items:flex-start}
.brand--footer .brand-name{font-size:20px;letter-spacing:.1em}
.brand--footer .brand-mark{height:30px;background:linear-gradient(180deg,var(--lake) 0 18px,var(--grid-line) 18px 100%)}
.footer-summary{max-width:36ch;font-size:14px;line-height:1.85;color:var(--text-dim)}

.footer-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.footer-col{display:flex;flex-direction:column;gap:10px}
.footer-title{
  font-family:var(--font-head);font-weight:600;
  font-size:12.5px;letter-spacing:.16em;color:var(--lake-soft);
}
.footer-links{display:grid;gap:8px}
.footer-links a{
  display:inline-flex;align-items:center;gap:.55em;
  padding:3px 0;font-size:13.5px;color:var(--text-dim);
  transition:color var(--dur) var(--ease);
}
.footer-links a::before{
  content:"";width:5px;height:5px;flex:0 0 auto;background:var(--grid-line);
  transition:background var(--dur) var(--ease);
}
.footer-links a:hover,.footer-links a:focus-visible{color:var(--text)}
.footer-links a:hover::before,.footer-links a:focus-visible::before{background:var(--lake)}

.footer-contact{
  padding-left:clamp(16px,2vw,22px);
  border-left:1px solid var(--grid-line);
}
.contact-list{display:grid;gap:12px;margin-top:10px}
.contact-key{
  display:block;margin-bottom:2px;
  font-family:var(--font-num);font-size:10.5px;letter-spacing:.14em;color:var(--lake);
}
.contact-value{display:block;font-size:13.5px;color:var(--text);word-break:break-word;line-height:1.6}
.contact-note{
  margin-top:14px;padding-left:10px;
  border-left:2px solid var(--rule);
  font-size:12.5px;line-height:1.75;color:var(--text-dim);
}

.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;
  padding-block:18px 22px;
  border-top:1px solid var(--grid-line);
  font-size:12.5px;
}
.footer-legal{display:flex;flex-wrap:wrap;gap:16px}
.footer-legal a{color:var(--text-dim);border-bottom:1px solid transparent;transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.footer-legal a:hover,.footer-legal a:focus-visible{color:var(--lake-soft);border-bottom-color:var(--lake)}
.footer-meta{display:flex;flex-wrap:wrap;gap:14px;font-family:var(--font-num);letter-spacing:.05em;color:rgba(169,187,211,.82)}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .brand-descriptor{display:none}
  .nav-list a{font-size:13px;padding:8px 8px}
}
@media (max-width:1023px){
  .header-shell{grid-template-columns:minmax(0,1fr) auto;gap:12px}
  .primary-nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;justify-content:flex-start;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    padding:10px var(--gutter) 20px;
    background:var(--ink-950);
    border-top:1px solid var(--grid-line);
    border-bottom:1px solid var(--grid-line);
    box-shadow:0 28px 48px -28px #000;
  }
  .site-header[data-open] .primary-nav{display:block;animation:nav-in var(--dur-slow) var(--ease) both}
  .nav-list{flex-direction:column;align-items:stretch;gap:6px;width:100%}
  .nav-list a{
    padding:13px 12px;font-size:15px;
    background:rgba(11,26,46,.7);border:1px solid var(--grid-line);
  }
  .round-status{display:none}
  .nav-toggle{display:inline-flex}
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1/-1}
  .footer-contact{padding-left:0;border-left:0}
  .grid--split{grid-template-columns:1fr}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@keyframes nav-in{
  from{opacity:0;transform:translateY(-6px)}
  to{opacity:1;transform:none}
}
@media (max-width:900px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:640px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .footer-nav{grid-template-columns:1fr 1fr}
  .footer-top{grid-template-columns:1fr}
  .footer-meta{font-size:11.5px}
  .footer-links a{font-size:14px}
}
@media (max-width:380px){
  .header-tools .btn--primary{display:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
    scroll-behavior:auto!important;
  }
  .panel:hover{transform:none}
  .site-header[data-open] .primary-nav{animation:none}
}