/* ===== 01. reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
@media (prefers-reduced-motion: no-preference){html{scroll-behavior:smooth}}
body,h1,h2,h3,h4,h5,p,ul,ol,li,dl,dt,dd,figure,blockquote{margin:0}
ul,ol{list-style:none;padding:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px}

/* ===== 02. tokens ===== */
:root{
  --ink:#070C18;
  --stand:#0E1A2E;
  --glass:#16273F;
  --lime:#B6FF3C;
  --orange:#FF7A2F;
  --cyan:#35D0D0;
  --gray:#8C99AB;
  --mist:#E6EAF2;
  --white:#FFFFFF;
  --alert:#FF4D5E;
  --line:rgba(140,153,171,.22);
  --line-soft:rgba(140,153,171,.14);
  --shell:1280px;
  --gutter:clamp(18px,4vw,56px);
  --radius:0px;
  --sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ===== 03. base ===== */
body{
  background:var(--ink);
  color:var(--mist);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  font-weight:500;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(1200px 620px at 80% -12%, rgba(53,208,208,.10), transparent 62%),
    radial-gradient(900px 520px at 4% 10%, rgba(182,255,60,.07), transparent 64%),
    repeating-linear-gradient(to right, rgba(140,153,171,.05) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(to bottom, rgba(140,153,171,.04) 0 1px, transparent 1px 96px);
}
#main-content{position:relative;z-index:1;scroll-margin-top:110px}
h1,h2,h3,h4{font-weight:900;line-height:1.2;color:var(--white);letter-spacing:.01em}
h1{font-size:clamp(2.6rem,6vw,5.4rem);letter-spacing:-.01em}
h2{font-size:clamp(1.5rem,2.6vw,2.4rem)}
h3{font-size:clamp(1.1rem,1.6vw,1.35rem)}
p{max-width:66ch}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.06em}

.ld-shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.ld-section{position:relative;padding-block:clamp(40px,7vw,96px)}
.ld-section__head{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;
  gap:14px 28px;padding-bottom:14px;margin-bottom:clamp(20px,3vw,38px);
  border-bottom:1px solid var(--line);
}
.eyebrow{font-family:var(--mono);font-size:11.5px;letter-spacing:.24em;color:var(--lime);text-transform:uppercase}
.section-title{font-size:clamp(1.5rem,2.6vw,2.4rem)}
.lede{font-size:clamp(1rem,1.35vw,1.12rem);color:#C8D1DE;line-height:1.8}
.divider{height:1px;background:linear-gradient(90deg,rgba(140,153,171,.42),rgba(140,153,171,0))}
.tick-rule{
  height:9px;
  background-image:repeating-linear-gradient(to right, rgba(140,153,171,.45) 0 1px, transparent 1px 18px);
  -webkit-mask-image:linear-gradient(to right,transparent,#000 10%,#000 90%,transparent);
  mask-image:linear-gradient(to right,transparent,#000 10%,#000 90%,transparent);
  pointer-events:none;
}
.annotation{
  writing-mode:vertical-rl;
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;
  color:var(--gray);text-transform:uppercase;
}
.annotation--rotate{writing-mode:horizontal-tb;transform:rotate(90deg);transform-origin:left center;white-space:nowrap}

/* ===== 04. skip link ===== */
.skip-link{
  position:absolute;left:var(--gutter);top:0;z-index:120;
  transform:translateY(-140%);
  display:inline-block;padding:10px 18px;
  background:var(--lime);color:#08121A;
  font-size:13px;letter-spacing:.14em;font-weight:700;
  transition:transform .18s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ===== 05. header ===== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,12,24,.9);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);
  backdrop-filter:blur(14px) saturate(1.2);
  border-bottom:1px solid var(--line-soft);
}
.ld-progress{position:absolute;left:0;right:0;top:0;height:2px;background:rgba(140,153,171,.14);overflow:hidden}
.ld-progress__bar{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--cyan),var(--lime) 60%,var(--orange));transition:width .12s linear}

.header-upper{border-bottom:1px solid var(--line-soft)}
.header-upper__inner{
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;gap:clamp(12px,3vw,40px);padding-block:10px;
}
.header-upper__note{font-size:12.5px;color:var(--gray);letter-spacing:.06em;text-align:center;max-width:none}
.header-upper__scope{
  display:flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.13em;color:var(--mist);white-space:nowrap;
}
.header-upper__sep{display:block;width:24px;height:1px;background:var(--orange)}

.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand__mark{
  display:grid;place-items:center;flex:none;
  width:42px;height:42px;
  border:1px solid var(--lime);color:var(--lime);
  font-family:var(--mono);font-size:13px;letter-spacing:.1em;
  background:linear-gradient(160deg,rgba(182,255,60,.16),rgba(53,208,208,.06));
  transition:background .18s ease,color .18s ease;
}
.brand:hover .brand__mark{background:var(--lime);color:var(--ink)}
.brand__text{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand__name{font-size:17px;font-weight:900;letter-spacing:.06em;color:var(--white);white-space:nowrap}
.brand__line{font-size:11.5px;letter-spacing:.12em;color:var(--gray);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.header-lower{position:relative;background:linear-gradient(90deg,rgba(14,26,46,.72),rgba(14,26,46,.5))}
.header-lower::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:6px;pointer-events:none;
  background-image:repeating-linear-gradient(to right, rgba(140,153,171,.4) 0 1px, transparent 1px 16px);
  -webkit-mask-image:linear-gradient(to right,transparent,#000 8%,#000 92%,transparent);
  mask-image:linear-gradient(to right,transparent,#000 8%,#000 92%,transparent);
}
.header-lower__inner{display:flex;align-items:center;gap:clamp(14px,3vw,34px);min-height:58px}
.header-lower__cta{flex:none}

.primary-nav{flex:1 1 auto;min-width:0}
.primary-nav__list{display:flex;align-items:center;gap:clamp(10px,2.2vw,30px);flex-wrap:wrap}
.primary-nav__link{
  position:relative;display:inline-block;padding:16px 2px 18px;
  font-size:14px;letter-spacing:.14em;color:var(--mist);
  transition:color .18s ease;
}
.primary-nav__link::after{
  content:"";position:absolute;left:0;bottom:11px;height:2px;width:0;
  background:linear-gradient(90deg,var(--lime),var(--cyan));
  transition:width .22s ease,background .18s ease;
}
.primary-nav__link:hover,.primary-nav__link:focus-visible{color:var(--white)}
.primary-nav__link:hover::after,.primary-nav__link:focus-visible::after{width:100%}
.primary-nav__link[aria-current="page"]{color:var(--lime)}
.primary-nav__link[aria-current="page"]::after{width:100%;background:var(--lime)}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:11px 14px;border:1px solid rgba(140,153,171,.35);
  color:var(--mist);transition:color .18s ease,border-color .18s ease;
}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars span{display:block;height:2px;background:currentColor;transition:transform .2s ease,opacity .2s ease}
.nav-toggle__label{font-size:12px;letter-spacing:.16em}
.nav-toggle:hover{border-color:var(--cyan);color:var(--white)}
.nav-toggle[aria-expanded="true"]{border-color:var(--lime);color:var(--lime)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

@media (min-width:901px){
  .header-upper{max-height:140px;overflow:hidden;transition:max-height .26s ease,opacity .26s ease}
  .site-header[data-scrolled] .header-upper{max-height:0;opacity:0;border-color:transparent}
}
@media (max-width:1080px){
  .header-upper__inner{grid-template-columns:auto auto}
  .header-upper__note{display:none}
}
@media (max-width:900px){
  .header-upper__inner{grid-template-columns:minmax(0,1fr) auto;padding-block:9px}
  .header-upper__scope{font-size:11px;letter-spacing:.1em}
  .nav-toggle{display:inline-flex;order:2}
  .header-lower__inner{justify-content:space-between;gap:12px;min-height:56px}
  .primary-nav{
    position:absolute;left:0;right:0;top:100%;z-index:5;
    padding:6px var(--gutter) 22px;
    background:rgba(9,17,30,.985);
    border-bottom:1px solid rgba(182,255,60,.28);
    max-height:calc(100vh - 140px);overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-10px);pointer-events:none;
    transition:opacity .18s ease,transform .18s ease,visibility .18s ease;
  }
  .primary-nav[data-open]{opacity:1;visibility:visible;transform:none;pointer-events:auto}
  .primary-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .primary-nav__link{
    display:flex;align-items:center;justify-content:space-between;
    padding:15px 0;border-bottom:1px solid var(--line-soft);
    font-size:16px;letter-spacing:.1em;
  }
  .primary-nav__link::after{bottom:8px}
  .primary-nav__link[aria-current="page"]::before{content:"";width:6px;height:6px;background:var(--lime)}
}
@media (max-width:560px){
  .brand__mark{width:36px;height:36px;font-size:11px}
  .brand__name{font-size:15px}
  .brand__line{font-size:10.5px;letter-spacing:.08em}
  .header-lower__cta{display:none}
}

/* ===== 06. buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;border:1px solid transparent;
  font-size:13px;font-weight:700;letter-spacing:.14em;
  transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn--primary{background:var(--lime);border-color:var(--lime);color:#08121A}
.btn--primary:hover{background:var(--orange);border-color:var(--orange);color:#0B0F16}
.btn--ghost{
  border-color:rgba(182,255,60,.5);color:var(--lime);
  background:linear-gradient(90deg,rgba(182,255,60,.09),rgba(182,255,60,0));
}
.btn--ghost:hover{border-color:var(--lime);background:var(--lime);color:var(--ink)}
.btn--quiet{border-color:rgba(140,153,171,.42);color:var(--mist)}
.btn--quiet:hover{border-color:var(--cyan);color:var(--white)}

/* ===== 07. layout grid ===== */
.ld-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2.4vw,32px)}
.ld-grid__main{grid-column:1 / span 8}
.ld-grid__aside{grid-column:10 / span 3}
.ld-grid__half{grid-column:span 6}
.ld-grid__full{grid-column:1 / -1}
@media (max-width:1024px){
  .ld-grid__main,.ld-grid__aside,.ld-grid__half{grid-column:1 / -1}
}

/* ===== 08. surfaces ===== */
.panel{border:1px solid var(--line);background:rgba(14,26,46,.55);padding:clamp(18px,2.6vw,28px)}
.panel--glass{
  background:rgba(22,39,63,.62);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-color:rgba(182,255,60,.24);
}
.panel__title{font-size:15px;font-weight:700;color:var(--white);letter-spacing:.08em;margin-bottom:10px}
.glass-note{
  display:inline-block;padding:7px 12px;
  background:rgba(22,39,63,.7);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--gray);
}

/* ===== 09. data components ===== */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border:1px solid var(--line);
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--mist);
}
.chip--lime{border-color:rgba(182,255,60,.55);color:var(--lime)}
.chip--orange{border-color:rgba(255,122,47,.55);color:var(--orange)}
.chip--cyan{border-color:rgba(53,208,208,.5);color:var(--cyan)}

.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:clamp(14px,2vw,26px)}
.stat{display:flex;flex-direction:column;gap:6px;padding-top:12px;border-top:1px solid var(--line)}
.stat__value{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:clamp(2rem,4.4vw,3.4rem);line-height:1;color:var(--white);letter-spacing:-.02em}
.stat__label{font-size:12px;letter-spacing:.16em;color:var(--gray)}

.table-wrap{overflow-x:auto;border:1px solid var(--line);background:rgba(14,26,46,.5)}
.data-table{min-width:520px;font-size:15px}
.data-table th,.data-table td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line-soft)}
.data-table th{
  font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.16em;
  color:var(--gray);text-transform:uppercase;background:rgba(22,39,63,.55);white-space:nowrap;
}
.data-table td{color:var(--mist)}
.data-table td.mono,.data-table th.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;text-align:right}
.data-table tbody tr:hover td{background:rgba(182,255,60,.05);color:var(--white)}
.data-table tbody tr:last-child td{border-bottom:0}

/* ===== 10. accordion ===== */
.details-panel{border:1px solid var(--line);background:rgba(14,26,46,.45);transition:border-color .18s ease}
.details-panel + .details-panel{margin-top:-1px}
.details-panel:hover{border-color:rgba(182,255,60,.4)}
.details-panel__summary{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:14px 18px;font-size:14.5px;color:var(--white);cursor:pointer;list-style:none;
}
.details-panel__summary::-webkit-details-marker{display:none}
.details-panel__summary::after{
  content:"+";font-family:var(--mono);font-size:16px;color:var(--lime);
  transition:transform .18s ease,color .18s ease;
}
.details-panel[open] .details-panel__summary::after{content:"–";color:var(--orange)}
.details-panel__body{padding:0 18px 18px;font-size:14px;color:#C3CCDA}

/* ===== 11. media frames ===== */
.media-frame{
  position:relative;width:100%;overflow:hidden;
  background:linear-gradient(150deg,#0E1A2E,#070C18 72%);
  border:1px solid var(--line);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    repeating-linear-gradient(to right, rgba(140,153,171,.13) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(to bottom, rgba(140,153,171,.11) 0 1px, transparent 1px 48px);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame__caption{
  position:absolute;left:12px;bottom:12px;z-index:2;
  padding:6px 11px;
  background:rgba(22,39,63,.72);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--mist);
}

/* ===== 12. breadcrumbs & toc ===== */
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding-block:14px;font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;color:var(--gray);
}
.breadcrumbs__link{transition:color .16s ease}
.breadcrumbs__link:hover,.breadcrumbs__link:focus-visible{color:var(--lime)}
.breadcrumbs__sep{color:rgba(140,153,171,.5)}
.breadcrumbs__current{color:var(--mist)}

.toc{display:grid;gap:2px;border-left:1px solid var(--line)}
.toc__link{
  display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px;align-items:baseline;
  margin-left:-1px;padding:8px 0 8px 14px;border-left:2px solid transparent;
  font-size:13.5px;color:var(--gray);
  transition:color .16s ease,border-color .16s ease,background .16s ease;
}
.toc__link:hover{color:var(--mist);background:rgba(182,255,60,.04)}
.toc__link[aria-current="true"]{color:var(--lime);border-left-color:var(--lime);background:rgba(182,255,60,.05)}
.toc__num{font-family:var(--mono);font-size:11px;opacity:.8}

/* ===== 13. reveal ===== */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
[data-reveal].is-visible{opacity:1;transform:none}

/* ===== 14. footer ===== */
.site-footer{
  position:relative;z-index:1;margin-top:clamp(60px,9vw,130px);
  background:linear-gradient(180deg,rgba(14,26,46,.7),rgba(7,12,24,.99));
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:6px;pointer-events:none;
  background-image:repeating-linear-gradient(to right, rgba(140,153,171,.45) 0 1px, transparent 1px 18px);
  -webkit-mask-image:linear-gradient(to right,transparent,#000 10%,#000 90%,transparent);
  mask-image:linear-gradient(to right,transparent,#000 10%,#000 90%,transparent);
}
.footer-top{
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,2fr);
  gap:clamp(26px,4vw,64px);padding-block:clamp(38px,6vw,68px) 30px;
}
.footer-brand{display:flex;flex-direction:column;gap:16px}
.brand--footer .brand__name{font-size:18px}
.footer-brand__note{font-size:13.5px;color:var(--gray);line-height:1.75;max-width:38ch}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px}
.footer-tag{
  padding:4px 10px;border:1px solid var(--line);
  font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--mist);
  transition:border-color .16s ease,color .16s ease;
}
.footer-tag:hover{border-color:var(--cyan);color:var(--white)}

.footer-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,3vw,38px)}
.footer-col__title{font-size:12px;font-weight:700;letter-spacing:.2em;color:var(--lime);margin-bottom:14px}
.footer-col__list{display:grid;gap:9px}
.footer-col__link{
  position:relative;display:inline-block;font-size:13.5px;color:var(--mist);
  transition:color .16s ease,transform .16s ease;
}
.footer-col__link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;
  background:var(--lime);transform:scaleX(0);transform-origin:left center;
  transition:transform .2s ease;
}
.footer-col__link:hover,.footer-col__link:focus-visible{color:var(--lime)}
.footer-col__link:hover::after,.footer-col__link:focus-visible::after{transform:scaleX(1)}

.footer-contact{padding-block:26px 24px}
.footer-contact__title{font-size:12px;font-weight:700;letter-spacing:.2em;color:var(--orange);margin-bottom:16px}
.contact-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px 34px}
.contact-list__item{display:flex;flex-direction:column;gap:4px;padding-left:12px;border-left:1px solid var(--line)}
.contact-list__term{font-size:11.5px;letter-spacing:.16em;color:var(--gray)}
.contact-list__desc{font-size:13.5px;color:var(--mist);word-break:break-word;max-width:none}

.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 26px;
  padding-block:18px 26px;border-top:1px solid var(--line-soft);
}
.footer-legal{font-size:12px;color:var(--gray);letter-spacing:.04em;max-width:none}
.footer-shortcuts{display:flex;flex-wrap:wrap;gap:18px}
.footer-shortcuts__link{font-size:12.5px;letter-spacing:.1em;color:var(--mist);transition:color .16s ease}
.footer-shortcuts__link:hover,.footer-shortcuts__link:focus-visible{color:var(--lime)}
.footer-meta{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;color:var(--gray)}

@media (max-width:1024px){
  .footer-top{grid-template-columns:minmax(0,1fr)}
  .footer-cols{grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
}
@media (max-width:640px){
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .ld-section__head{flex-direction:column;align-items:flex-start;gap:8px}
}

/* ===== 15. reduced motion ===== */
@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}
  .ld-progress__bar{transition:none}
}