*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit}
a{color:inherit}

:root{
  --ink-900:#060B18;
  --ink-800:#0B1428;
  --ink-700:#121F3A;
  --paper:#F2F6FF;
  --cyan:#22E6FF;
  --cyan-soft:#7AF2FF;
  --orange:#FF7A1A;
  --gold:#C9A25E;
  --green:#35E08A;
  --red:#FF4D6D;
  --muted:#8FA3C8;
  --border:#2A3B5F;
  --rail-w:236px;
  --bar-h:56px;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Noto Sans Mono",monospace;
  --shadow-hard:6px 6px 0 rgba(3,8,18,.72);
}

html,body{background:var(--ink-900)}
body{
  min-height:100vh;
  padding-left:var(--rail-w);
  padding-top:var(--bar-h);
  color:var(--paper);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.7;
  letter-spacing:.01em;
  background-color:var(--ink-900);
  background-image:
    radial-gradient(1100px 560px at 82% -8%,rgba(34,230,255,.10),transparent 62%),
    radial-gradient(760px 420px at 12% 108%,rgba(255,122,26,.07),transparent 66%);
  background-attachment:fixed;
}
h1,h2,h3,h4{line-height:1.2;font-weight:900;letter-spacing:-.015em;word-break:break-word}
p{max-width:72ch}
strong{font-weight:800;color:var(--paper)}

:where(a,button,summary,[tabindex]):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:2px;
}

.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
}
.lead{
  font-size:17px;
  line-height:1.75;
  color:var(--muted);
  max-width:62ch;
}
.page-title{
  font-size:clamp(38px,5.6vw,84px);
  font-weight:900;
  line-height:1.03;
  letter-spacing:-.03em;
  margin:0;
}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:200;
  padding:10px 16px;
  background:var(--cyan);
  color:#04101C;
  font-weight:800;
  font-size:14px;
  text-decoration:none;
  border:2px solid #04101C;
  border-radius:2px;
  transform:translateY(-180%);
  transition:transform .16s ease;
}
.skip-link:focus-visible{transform:translateY(0)}

/* ---------- frame shell ---------- */
.site-frame{position:relative;z-index:100}

/* ---------- top bar ---------- */
.frame-bar{
  position:fixed;
  top:0;
  left:var(--rail-w);
  right:0;
  z-index:80;
  display:flex;
  align-items:center;
  gap:18px;
  height:var(--bar-h);
  padding:0 22px;
  background:rgba(11,20,40,.94);
  border-bottom:1px solid var(--border);
  backdrop-filter:blur(8px);
}
.frame-bar__brand{
  display:none;
  align-items:center;
  gap:8px;
  text-decoration:none;
  color:var(--paper);
}
.frame-bar__mark{
  font-family:var(--font-mono);
  font-size:17px;
  font-weight:800;
  color:var(--cyan);
  letter-spacing:-.02em;
}
.frame-bar__name{
  font-size:14px;
  font-weight:800;
  letter-spacing:.06em;
}
.frame-bar__tagline{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--muted);
  text-transform:none;
}
.frame-bar__tools{
  display:flex;
  align-items:center;
  gap:16px;
  margin-left:auto;
}
.status-pill{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--muted);
  white-space:nowrap;
}
.status-pill__dot{
  width:7px;
  height:7px;
  flex:0 0 auto;
  border-radius:50%;
  background:var(--green);
  box-shadow:0 0 0 3px rgba(53,224,138,.16);
}
.frame-bar__quick{
  display:inline-flex;
  align-items:center;
  padding:5px 11px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--paper);
  text-decoration:none;
  border:1px solid var(--border);
  border-radius:2px;
  transition:color .14s ease,border-color .14s ease,background-color .14s ease;
  white-space:nowrap;
}
.frame-bar__quick:hover{
  color:var(--cyan);
  border-color:var(--cyan);
  background:rgba(34,230,255,.08);
}
.frame-bar__progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--cyan-soft) 45%,var(--orange));
  transform:scaleX(0);
  transform-origin:0 50%;
  pointer-events:none;
}

/* ---------- nav toggle ---------- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:7px 11px;
  background:transparent;
  color:var(--paper);
  border:1px solid var(--border);
  border-radius:2px;
  cursor:pointer;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
}
.nav-toggle__box{display:grid;gap:3px;width:16px}
.nav-toggle__bar{
  display:block;
  height:2px;
  background:var(--cyan);
  transition:transform .18s ease,opacity .18s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ---------- left rail ---------- */
.frame-rail{
  position:fixed;
  top:0;
  left:0;
  z-index:90;
  display:flex;
  flex-direction:column;
  gap:16px;
  width:var(--rail-w);
  height:100vh;
  height:100dvh;
  padding:22px 16px 18px;
  overflow-y:auto;
  overscroll-behavior:contain;
  background-color:var(--ink-800);
  background-image:repeating-linear-gradient(180deg,rgba(42,59,95,.22) 0 1px,transparent 1px 6px);
  border-right:1px solid var(--border);
}
.brand{
  display:grid;
  gap:2px;
  padding-bottom:14px;
  text-decoration:none;
  color:var(--paper);
  border-bottom:1px dashed var(--border);
}
.brand__mark{
  font-family:var(--font-mono);
  font-size:30px;
  font-weight:800;
  line-height:1;
  letter-spacing:-.03em;
  color:var(--cyan);
}
.brand__mark em{
  font-style:normal;
  font-size:13px;
  letter-spacing:.14em;
  color:var(--gold);
  margin-left:7px;
  vertical-align:2px;
}
.brand__name{font-size:18px;font-weight:900;letter-spacing:.04em}
.brand__sub{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--muted);
}
.rail-note{
  padding-left:9px;
  border-left:2px solid var(--orange);
  font-size:11px;
  line-height:1.65;
  letter-spacing:.06em;
  color:var(--muted);
  max-width:none;
}
.rail-nav__list{display:grid;gap:2px}
.rail-nav__link{
  position:relative;
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:9px 8px 9px 12px;
  font-size:14px;
  font-weight:600;
  color:var(--muted);
  text-decoration:none;
  border-left:2px solid transparent;
  border-radius:0 2px 2px 0;
  transition:color .14s ease,background-color .14s ease,border-color .14s ease;
}
.rail-nav__num{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--border);
  transition:color .14s ease;
}
.rail-nav__label{letter-spacing:.02em}
.rail-nav__link:hover,
.rail-nav__link:focus-visible{
  color:var(--paper);
  border-left-color:var(--cyan-soft);
  background:rgba(34,230,255,.07);
}
.rail-nav__link:hover .rail-nav__num{color:var(--cyan-soft)}
.rail-nav__link[aria-current="page"]{
  color:var(--paper);
  font-weight:800;
  background:var(--ink-700);
  border-left-color:var(--cyan);
  box-shadow:inset 0 0 0 1px rgba(34,230,255,.18);
}
.rail-nav__link[aria-current="page"] .rail-nav__num{color:var(--cyan)}
.rail-actions{
  display:grid;
  gap:8px;
  margin-top:auto;
  padding-top:8px;
}
.rail-foot{
  display:grid;
  gap:4px;
  padding-top:12px;
  border-top:1px solid var(--border);
  font-size:11px;
  color:var(--muted);
  letter-spacing:.04em;
}
.rail-foot__label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  color:var(--gold);
}
.rail-foot__mail{
  color:var(--muted);
  text-decoration:none;
  border-bottom:1px solid var(--border);
  width:max-content;
  transition:color .14s ease,border-color .14s ease;
}
.rail-foot__mail:hover{color:var(--cyan);border-bottom-color:var(--cyan)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:42px;
  padding:10px 18px;
  font-family:var(--font-sans);
  font-size:14px;
  font-weight:800;
  letter-spacing:.04em;
  text-decoration:none;
  color:var(--paper);
  background:transparent;
  border:2px solid var(--border);
  border-radius:2px;
  cursor:pointer;
  transition:transform .14s ease,box-shadow .14s ease,background-color .14s ease,color .14s ease,border-color .14s ease;
}
.btn:hover{transform:translate(-1px,-1px)}
.btn--cyan{
  background:var(--cyan);
  border-color:var(--cyan);
  color:#04101C;
  box-shadow:4px 4px 0 rgba(3,8,18,.85);
}
.btn--cyan:hover{
  background:var(--cyan-soft);
  box-shadow:6px 6px 0 rgba(3,8,18,.9);
}
.btn--ghost{
  background:rgba(18,31,58,.65);
  border-color:var(--border);
  color:var(--paper);
}
.btn--ghost:hover{
  border-color:var(--cyan);
  color:var(--cyan);
  box-shadow:4px 4px 0 rgba(3,8,18,.7);
}
.btn--sm{min-height:34px;padding:6px 13px;font-size:12px;letter-spacing:.08em}
.btn--block{width:100%}

/* ---------- content primitives ---------- */
.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 24px;
}
.grid{display:grid;gap:24px}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--muted);
}
.breadcrumb a{
  color:var(--muted);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .14s ease,border-color .14s ease;
}
.breadcrumb a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.breadcrumb__sep{color:var(--border)}
.breadcrumb [aria-current="page"]{color:var(--paper)}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:12px;
  padding-bottom:12px;
  margin-bottom:24px;
  border-bottom:1px solid var(--border);
}
.section-head__title{
  font-size:clamp(22px,2.6vw,30px);
  font-weight:900;
  letter-spacing:-.015em;
}
.panel{
  padding:22px;
  background:var(--ink-800);
  border:1px solid var(--border);
  border-radius:3px;
  box-shadow:0 0 0 1px rgba(6,11,24,.55);
}
.panel--raised{
  background:var(--ink-700);
  box-shadow:var(--shadow-hard);
}
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--muted);
  background:rgba(18,31,58,.72);
  border:1px solid var(--border);
  border-radius:2px;
  white-space:nowrap;
}
.chip--cyan{color:var(--cyan);background:rgba(34,230,255,.09);border-color:rgba(34,230,255,.5)}
.chip--orange{color:var(--orange);background:rgba(255,122,26,.1);border-color:rgba(255,122,26,.5)}
.chip--gold{color:var(--gold);background:rgba(201,162,94,.1);border-color:rgba(201,162,94,.5)}
.chip--green{color:var(--green);background:rgba(53,224,138,.1);border-color:rgba(53,224,138,.5)}

/* ---------- tabs ---------- */
.tabs{display:block}
.tabs__list{
  display:flex;
  flex-wrap:wrap;
  gap:2px;
  margin-bottom:20px;
  border-bottom:1px solid var(--border);
}
.tabs__btn{
  appearance:none;
  padding:10px 16px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--muted);
  background:transparent;
  border:0;
  border-bottom:2px solid transparent;
  cursor:pointer;
  transition:color .14s ease,background-color .14s ease,border-color .14s ease;
}
.tabs__btn:hover{color:var(--paper);background:rgba(34,230,255,.06)}
.tabs__btn[aria-selected="true"]{
  color:var(--cyan);
  border-bottom-color:var(--cyan);
  background:rgba(34,230,255,.08);
}
.tabs__panel{padding-top:2px}
.tabs__panel[hidden]{display:none}

/* ---------- media frame ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border:1px solid var(--border);
  border-radius:3px;
  box-shadow:var(--shadow-hard);
  background-color:var(--ink-700);
  background-image:
    radial-gradient(120% 90% at 14% 8%,rgba(34,230,255,.18),transparent 60%),
    radial-gradient(90% 84% at 86% 92%,rgba(255,122,26,.15),transparent 62%),
    linear-gradient(158deg,var(--ink-700),var(--ink-900));
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(242,246,255,.05) 0 1px,transparent 1px 4px);
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame img,
.media-frame__img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media-frame__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:1;
  padding:8px 12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--paper);
  background:rgba(6,11,24,.8);
  border-top:1px solid var(--border);
  max-width:none;
}

/* ---------- footer ---------- */
.site-foot{
  position:relative;
  margin-top:96px;
  background:linear-gradient(180deg,var(--ink-800),var(--ink-900) 72%);
  border-top:1px solid var(--border);
}
.site-foot::before{
  content:"";
  position:absolute;
  inset:0 0 auto;
  height:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(34,230,255,0) 42%,var(--orange),rgba(255,122,26,0) 92%);
}
.site-foot__grid{
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1.4fr;
  gap:32px;
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:58px 24px 40px;
}
.site-foot__brand{display:grid;gap:10px;align-content:start;justify-items:start}
.site-foot__mark{
  font-family:var(--font-mono);
  font-size:28px;
  font-weight:800;
  line-height:1;
  letter-spacing:-.03em;
  color:var(--cyan);
  max-width:none;
}
.site-foot__mark span{
  font-size:12px;
  letter-spacing:.16em;
  color:var(--gold);
  margin-left:7px;
  vertical-align:2px;
}
.site-foot__name{font-size:17px;font-weight:900;letter-spacing:.05em;max-width:none}
.site-foot__summary{font-size:13px;line-height:1.75;color:var(--muted);max-width:38ch}
.site-foot__col{display:grid;gap:12px;align-content:start}
.site-foot__title{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.18em;
  color:var(--gold);
  text-transform:uppercase;
}
.site-foot__list{display:grid;gap:7px}
.site-foot__link{
  display:inline-block;
  font-size:13.5px;
  color:var(--muted);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .14s ease,border-color .14s ease;
}
.site-foot__link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.site-foot__contact-row{
  display:grid;
  grid-template-columns:52px minmax(0,1fr);
  gap:8px;
  align-items:baseline;
  font-size:13px;
  max-width:none;
}
.site-foot__label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--muted);
  text-transform:uppercase;
}
.site-foot__value{color:var(--paper);word-break:break-word}
.site-foot__note{
  margin-top:4px;
  padding-left:10px;
  border-left:2px solid var(--border);
  font-size:12px;
  line-height:1.7;
  color:var(--muted);
  max-width:36ch;
}
.site-foot__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:18px 24px 30px;
  border-top:1px solid var(--border);
  font-size:12px;
  color:var(--muted);
}
.site-foot__legal-copy{max-width:none;letter-spacing:.02em}
.site-foot__legal-links{display:flex;flex-wrap:wrap;gap:18px}
.site-foot__legal-links a{
  color:var(--muted);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .14s ease,border-color .14s ease;
}
.site-foot__legal-links a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}

/* ---------- responsive ---------- */
@media (max-width:1120px){
  :root{--rail-w:204px}
  .frame-bar__tagline{display:none}
  .status-pill{display:none}
  .rail-nav__link{font-size:13px;padding-left:9px}
  .brand__mark{font-size:26px}
  .site-foot__grid{grid-template-columns:1.5fr 1fr 1fr;gap:26px}
  .site-foot__col--contact{grid-column:1 / -1}
}

@media (max-width:860px){
  :root{--rail-w:0px;--bar-h:54px}
  body{padding-left:0;background-attachment:scroll}
  .frame-bar{left:0;padding:0 14px;gap:12px}
  .frame-bar__brand{display:inline-flex}
  .frame-bar__tagline,
  .frame-bar__tools{display:none}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .frame-rail{
    top:var(--bar-h);
    left:0;
    right:0;
    width:100%;
    height:auto;
    max-height:calc(100dvh - var(--bar-h));
    padding:18px 16px 22px;
    border-right:0;
    border-bottom:1px solid var(--border);
    box-shadow:0 18px 42px rgba(3,8,18,.65);
    transform:translateY(-14px);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transition:transform .2s ease,opacity .2s ease,visibility .2s ease;
  }
  .frame-rail[data-open]{
    transform:translateY(0);
    opacity:1;
    visibility:visible;
    pointer-events:auto;
  }
  .brand{display:none}
  .rail-note{
    padding-left:8px;
    font-size:10.5px;
    letter-spacing:.1em;
  }
  .rail-nav__list{grid-template-columns:repeat(2,minmax(0,1fr));gap:4px}
  .rail-nav__link{
    padding:11px 10px;
    font-size:13.5px;
    background:rgba(18,31,58,.55);
    border:1px solid var(--border);
    border-left-width:2px;
    border-radius:2px;
  }
  .rail-actions{
    grid-template-columns:1fr 1fr;
    gap:8px;
    margin-top:14px;
    padding-top:0;
  }
  .rail-foot{
    grid-template-columns:auto 1fr;
    align-items:baseline;
    gap:6px 10px;
    margin-top:4px;
  }
  .rail-foot__mail{grid-column:1 / -1}
  .site-foot{margin-top:64px}
  .site-foot__grid{grid-template-columns:1fr 1fr;gap:26px;padding:40px 18px 28px}
  .site-foot__brand{grid-column:1 / -1}
  .site-foot__col--contact{grid-column:1 / -1}
  .site-foot__legal{flex-direction:column;align-items:flex-start;gap:10px;padding:16px 18px 28px}
  .container{padding:0 18px}
  .grid{gap:18px}
}

@media (max-width:520px){
  .site-foot__grid{grid-template-columns:1fr}
  .rail-nav__list{grid-template-columns:1fr}
  .rail-actions{grid-template-columns:1fr}
  .page-title{font-size:clamp(32px,9vw,46px)}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    transition-duration:.01ms !important;
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
  }
  .btn:hover{transform:none}
  .media-frame::after{display:none}
  .skip-link{transition:none}
  .frame-rail{transition:none}
}