/* ===== 1. Reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit}
table{border-collapse:collapse}

/* ===== 2. Tokens ===== */
:root{
  --ink:#0B1B33;
  --ink-deep:#07111F;
  --ink-lift:#132A47;
  --vermilion:#C63C2F;
  --vermilion-soft:#E9B8AE;
  --gold:#D4A24C;
  --slate:#5E7286;
  --paper:#F4F1EA;
  --black:#111820;
  --cyan:#2FD1C5;
  --violet:#7C5CFF;
  --line:rgba(94,114,134,.42);
  --line-soft:rgba(94,114,134,.22);
  --hair-strong:#16304f;
  --rail-w:264px;
  --bar-h:58px;
  --hard-shadow:6px 6px 0 rgba(0,0,0,.45);
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono","SFMono-Regular",Menlo,Consolas,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ===== 3. Base ===== */
body{
  min-height:100vh;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.012em;
  color:var(--paper);
  background-color:var(--ink);
  background-image:
    linear-gradient(rgba(94,114,134,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(94,114,134,.07) 1px,transparent 1px);
  background-size:64px 64px,64px 64px;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--vermilion);color:#fff}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ===== 4. A11y helpers ===== */
.skip-link{
  position:absolute;left:12px;top:-120px;z-index:200;
  padding:10px 16px;border:2px solid var(--ink-deep);
  background:var(--gold);color:var(--ink-deep);
  font-size:13px;font-weight:700;letter-spacing:.08em;text-decoration:none;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}
:focus-visible{outline:3px solid var(--cyan);outline-offset:3px}
.surface--paper :focus-visible{outline-color:var(--vermilion)}

/* ===== 5. Layout ===== */
.wrap{width:100%;max-width:1280px;margin-inline:auto;padding-inline:clamp(18px,4vw,56px)}
.section{padding-block:clamp(52px,8vw,112px)}
.section--tight{padding-block:clamp(32px,5vw,64px)}
.surface--deep{background:var(--ink-deep);color:var(--paper)}
.surface--paper{background:var(--paper);color:var(--black)}
.surface--paper .lede{color:#3b4757}
.surface--paper .note{color:#5a6675}
.surface--paper .eyebrow{color:var(--vermilion)}
.surface--band{
  background:linear-gradient(180deg,rgba(7,17,31,.92),rgba(11,27,51,.92));
  border-block:2px solid var(--line);
}
.grid{display:grid;gap:clamp(16px,2.2vw,30px)}
@media (min-width:640px){.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:900px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
  .grid--asym{grid-template-columns:minmax(0,1.5fr) minmax(0,1fr)}
}

/* ===== 6. Type ===== */
.display{font-size:clamp(42px,6vw,88px);line-height:1.04;font-weight:800;letter-spacing:.06em}
.h2{font-size:clamp(30px,4vw,56px);line-height:1.12;font-weight:800;letter-spacing:.05em}
.h3{font-size:clamp(20px,2.4vw,30px);line-height:1.3;font-weight:700;letter-spacing:.04em}
.eyebrow{font-size:12px;letter-spacing:.28em;color:var(--slate)}
.lede{font-size:17px;line-height:1.95;max-width:62ch;color:rgba(244,241,234,.84)}
.note{font-size:13px;line-height:1.85;color:var(--slate)}

/* ===== 7. Pills / tags / buttons ===== */
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border:1px solid currentColor;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
}
.pill--gold{color:var(--gold)}
.pill--cyan{color:var(--cyan)}
.pill--red{color:var(--vermilion-soft)}
.pill--violet{color:var(--violet)}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 12px;border:2px solid var(--line);background:transparent;
  color:rgba(244,241,234,.85);font-size:12px;letter-spacing:.12em;cursor:pointer;
  transition:border-color .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.tag:hover{border-color:var(--cyan);color:var(--cyan)}
.tag[aria-pressed="true"]{background:var(--violet);border-color:var(--violet);color:#fff}
.tag-group{display:flex;flex-wrap:wrap;gap:8px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;border:2px solid transparent;cursor:pointer;
  font-size:13px;font-weight:700;letter-spacing:.12em;text-decoration:none;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease);
}
.btn--primary{background:var(--vermilion);color:#fff;border-color:#8e291f;box-shadow:4px 4px 0 rgba(0,0,0,.45)}
.btn--primary:hover{background:var(--paper);color:var(--ink-deep);border-color:var(--paper)}
.btn--ghost{background:transparent;color:var(--paper);border-color:var(--slate)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--gold{background:var(--gold);color:var(--ink-deep);border-color:#8a6421;box-shadow:4px 4px 0 rgba(0,0,0,.45)}
.btn--gold:hover{background:var(--paper);border-color:var(--paper)}
.btn--outline{background:transparent;color:var(--ink-deep);border-color:var(--ink-deep)}
.btn--outline:hover{background:var(--ink-deep);color:var(--paper)}
.btn:active{transform:translate(2px,2px);box-shadow:none}
.copy-btn{
  display:inline-flex;align-items:center;gap:8px;padding:6px 12px;
  border:2px solid var(--line);background:transparent;color:var(--paper);cursor:pointer;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.copy-btn:hover{border-color:var(--cyan);color:var(--cyan)}
.copy-btn:active{background:rgba(47,209,197,.12)}

/* ===== 8. Blocks ===== */
.panel{
  border:2px solid var(--line);background:rgba(7,17,31,.55);
  padding:clamp(18px,2.4vw,28px);
}
.panel--gold{border-color:var(--gold);box-shadow:var(--hard-shadow)}
.panel--paper{background:var(--paper);color:var(--black);border-color:var(--black)}
.panel__head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:14px}
.panel__title{font-size:15px;letter-spacing:.14em;font-weight:700}
.stat{display:flex;flex-direction:column;gap:4px}
.stat__value{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(26px,3vw,40px);font-weight:700;line-height:1.1;color:var(--gold)}
.stat__label{font-size:12px;letter-spacing:.16em;color:var(--slate)}
.band{display:flex;overflow-x:auto;border:2px solid var(--line);background:rgba(7,17,31,.6)}
.band__cell{flex:1 0 auto;padding:12px 18px;border-right:1px solid var(--line);font-size:13px;letter-spacing:.08em;white-space:nowrap;color:rgba(244,241,234,.82)}
.band__cell:last-child{border-right:0}
.band__cell--key{font-family:var(--font-mono);font-weight:700;color:var(--gold)}
.timeline{position:relative;border-left:2px solid var(--line);padding-left:24px}
.timeline__item{position:relative;padding-bottom:26px}
.timeline__item:last-child{padding-bottom:0}
.timeline__item::before{
  content:"";position:absolute;left:-32px;top:9px;width:12px;height:12px;
  background:var(--ink);border:2px solid var(--gold);
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.timeline__item:hover::before{background:var(--gold)}
.timeline__item[data-state="active"]::before{background:var(--vermilion);border-color:var(--vermilion)}
.timeline__meta{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--slate)}
.index{border-left:2px solid var(--line);padding-left:16px}
.index__link{display:flex;gap:10px;padding:6px 0;font-size:14px;text-decoration:none;color:var(--slate);transition:color .2s var(--ease)}
.index__link:hover{color:var(--cyan)}
.index__link[aria-current="true"]{color:var(--gold);font-weight:700}
.disclosure{border:2px solid var(--line);background:rgba(7,17,31,.55)}
.disclosure__btn{
  display:flex;width:100%;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 18px;text-align:left;cursor:pointer;
  font-size:16px;font-weight:700;letter-spacing:.04em;color:var(--paper);
  transition:background .2s var(--ease);
}
.disclosure__btn::after{content:"＋";font-family:var(--font-mono);font-size:18px;color:var(--gold)}
.disclosure__btn[aria-expanded="true"]::after{content:"－"}
.disclosure__btn:hover{background:rgba(47,209,197,.08)}
.disclosure__panel{padding:0 18px 18px;font-size:15px;line-height:1.9;color:rgba(244,241,234,.82)}
.disclosure__panel[hidden]{display:none}
.breadcrumbs{padding-block:14px;font-size:13px}
.breadcrumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;color:var(--slate);letter-spacing:.06em}
.breadcrumbs__list a{color:var(--slate);text-decoration:none;border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease)}
.breadcrumbs__list a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.breadcrumbs__sep{font-family:var(--font-mono);color:var(--line)}
.breadcrumbs__current{color:var(--paper);font-weight:700}
.divider{height:2px;border:0;margin-block:clamp(24px,4vw,48px);background:var(--line)}
.divider--dashed{background:repeating-linear-gradient(90deg,var(--line) 0 8px,transparent 8px 16px)}
.data-table{width:100%;font-size:14px}
.data-table th,.data-table td{padding:10px 12px;border-bottom:1px solid var(--line-soft);text-align:left}
.data-table th{font-size:12px;letter-spacing:.16em;color:var(--slate);font-weight:700}
.data-table .num{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.prose{font-size:16px;line-height:1.95}
.prose>*+*{margin-top:1.1em}
.prose h2{font-size:clamp(22px,2.6vw,32px);line-height:1.3;letter-spacing:.04em;margin-top:1.8em}
.prose h3{font-size:clamp(18px,2vw,22px);letter-spacing:.04em;margin-top:1.5em}
.prose a{color:var(--cyan)}
.surface--paper .prose a{color:var(--vermilion)}
.prose ul li{position:relative;padding-left:18px}
.prose ul li::before{content:"";position:absolute;left:0;top:.85em;width:8px;height:2px;background:var(--gold)}
.prose ol{padding-left:1.4em;list-style:decimal}
.prose blockquote{border-left:3px solid var(--gold);padding-left:16px;color:rgba(244,241,234,.85)}
.figure{
  position:relative;overflow:hidden;border:2px solid var(--line);box-shadow:var(--hard-shadow);
  background-color:var(--ink-deep);
  background-image:
    linear-gradient(135deg,rgba(47,209,197,.10),rgba(124,92,255,.10)),
    repeating-linear-gradient(0deg,rgba(94,114,134,.16) 0 1px,transparent 1px 24px),
    repeating-linear-gradient(90deg,rgba(94,114,134,.16) 0 1px,transparent 1px 24px);
}
.figure img{width:100%;height:100%;object-fit:cover}
.figure--16x9{aspect-ratio:16/9}
.figure--4x3{aspect-ratio:4/3}
.figure--1x1{aspect-ratio:1/1}
.figure--3x4{aspect-ratio:3/4}
.figure--paper{border-color:var(--black);background-color:#e7e2d6}
.figure__caption{
  position:absolute;left:0;right:0;bottom:0;padding:8px 14px;
  border-top:2px solid var(--line);background:rgba(7,17,31,.86);
  color:var(--paper);font-size:12px;letter-spacing:.12em;
}

/* ===== 9. Header ===== */
.site-header{position:relative;z-index:80}

.rail{
  padding:14px 16px;
  background:var(--ink-deep);
  border-bottom:3px solid var(--hair-strong);
}
.rail__top{display:flex;align-items:center;justify-content:space-between;gap:14px}
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:var(--paper)}
.brand__seal{
  display:grid;place-items:center;flex:none;width:42px;height:42px;
  background:var(--vermilion);color:var(--paper);
  border:2px solid #7c1f16;box-shadow:3px 3px 0 rgba(0,0,0,.5);
  font-family:var(--font-mono);font-size:19px;font-weight:700;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.brand:hover .brand__seal{background:var(--gold);color:var(--ink-deep);border-color:#8a6421}
.brand__text{display:flex;flex-direction:column;line-height:1.25}
.brand__name{font-size:16px;font-weight:800;letter-spacing:.08em}
.brand__tag{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--gold)}

.nav-toggle{
  display:inline-flex;align-items:center;gap:8px;padding:9px 12px;cursor:pointer;
  border:2px solid var(--slate);background:transparent;color:var(--paper);
  font-size:12px;letter-spacing:.16em;
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle__bars span{display:block;height:2px;background:currentColor}
.nav-toggle__bars span:nth-child(2){width:70%}
.nav-toggle__bars span:nth-child(3){width:45%}
.site-header[data-open] .nav-toggle{background:var(--vermilion);border-color:var(--vermilion);color:#fff}

.rail__nav{display:none;margin-top:14px;padding-top:12px;border-top:1px solid var(--line-soft)}
.site-header[data-open] .rail__nav{display:block}
.nav__list{display:flex;flex-direction:column;gap:2px}
.nav__link{
  display:flex;align-items:baseline;gap:12px;padding:10px 12px;
  border-left:3px solid transparent;
  color:rgba(244,241,234,.78);font-size:15px;letter-spacing:.04em;text-decoration:none;
  transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.nav__link:hover{background:rgba(47,209,197,.08);border-left-color:var(--cyan);color:var(--paper)}
.nav__link[aria-current="page"]{
  background:linear-gradient(90deg,rgba(198,60,47,.28),rgba(198,60,47,0));
  border-left-color:var(--vermilion);color:#fff;font-weight:700;
}
.nav__idx{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--slate)}
.nav__link[aria-current="page"] .nav__idx{color:var(--gold)}
.nav__label{position:relative;display:inline-block}
.nav__label::after{
  content:"";position:absolute;left:0;bottom:-3px;width:0;height:2px;background:var(--cyan);
  transition:width .28s var(--ease);
}
.nav__link:hover .nav__label::after{width:100%}
.nav__link[aria-current="page"] .nav__label::after{width:100%;background:var(--gold)}

.rail__meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:16px;padding-top:14px;border-top:1px solid var(--line-soft);
}
.rail__note{font-size:12px;letter-spacing:.06em;color:var(--slate)}

.cmdbar{
  position:relative;
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;
  min-height:var(--bar-h);padding:10px 16px;
  background:rgba(11,27,51,.97);
  border-bottom:3px solid var(--hair-strong);
}
.cmdbar__kicker{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.18em;white-space:nowrap}
.cmdbar__dot{width:8px;height:8px;background:var(--cyan);box-shadow:0 0 0 3px rgba(47,209,197,.18);animation:cmdPulse 2.6s var(--ease) infinite}
@keyframes cmdPulse{0%,100%{opacity:1}50%{opacity:.45}}
.cmdbar__rule{
  flex:1 1 24px;height:2px;
  background:repeating-linear-gradient(90deg,var(--line) 0 6px,transparent 6px 12px);
}
.cmdbar__quick{
  font-size:13px;letter-spacing:.08em;color:var(--slate);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.cmdbar__quick:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.cmdbar__cta{margin-left:auto}

@media (min-width:720px){
  .rail{padding:16px 22px}
  .rail__nav{display:block}
  .nav-toggle{display:none}
  .nav__list{flex-direction:row;flex-wrap:wrap;gap:6px}
  .nav__link{padding:8px 12px;border-left:0;border-bottom:3px solid transparent}
  .nav__link:hover{border-left-color:transparent;border-bottom-color:var(--cyan)}
  .nav__link[aria-current="page"]{
    background:linear-gradient(180deg,rgba(198,60,47,0),rgba(198,60,47,.26));
    border-left-color:transparent;border-bottom-color:var(--vermilion);
  }
}

@media (min-width:1080px){
  body{padding-left:var(--rail-w);padding-top:var(--bar-h)}
  .rail{
    position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);
    display:flex;flex-direction:column;gap:20px;
    padding:26px 20px 22px;overflow-y:auto;
    border-bottom:0;border-right:3px solid var(--hair-strong);
  }
  .rail__nav{margin-top:0}
  .rail__meta{margin-top:auto}
  .nav__list{flex-direction:column;flex-wrap:nowrap;gap:2px}
  .nav__link{padding:10px 12px;border-bottom:0;border-left:3px solid transparent}
  .nav__link:hover{border-left-color:var(--cyan);border-bottom-color:transparent}
  .nav__link[aria-current="page"]{
    background:linear-gradient(90deg,rgba(198,60,47,.28),rgba(198,60,47,0));
    border-left-color:var(--vermilion);border-bottom-color:transparent;
  }
  .cmdbar{position:fixed;top:0;left:var(--rail-w);right:0;z-index:70;flex-wrap:nowrap;padding:0 24px}
  .cmdbar__cta{margin-left:0}
}

/* ===== 10. Footer ===== */
.site-footer{
  background:var(--ink-deep);
  border-top:3px solid var(--hair-strong);
  color:var(--paper);
}
.footer__wrap{padding-block:clamp(40px,6vw,78px) 0}
.footer__grid{display:grid;gap:clamp(24px,3.4vw,48px)}
@media (min-width:760px){.footer__grid{grid-template-columns:1.1fr .8fr 1.4fr}}
.footer__mark{font-size:clamp(20px,2.6vw,30px);font-weight:800;letter-spacing:.1em}
.footer__line{margin-top:10px;font-size:14px;letter-spacing:.06em;color:var(--slate)}
.footer__mono{margin-top:12px;font-size:13px;letter-spacing:.06em;color:var(--gold)}
.footer__brand .pill{margin-top:16px}
.footer__title{margin-bottom:14px;font-size:12px;letter-spacing:.24em;color:var(--slate)}
.footer__list{display:flex;flex-direction:column;gap:10px}
.footer__link{
  position:relative;display:inline-block;font-size:15px;letter-spacing:.04em;
  color:var(--paper);text-decoration:none;
  transition:color .2s var(--ease);
}
.footer__link::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--cyan);
  transition:width .28s var(--ease);
}
.footer__link:hover{color:var(--cyan)}
.footer__link:hover::after{width:100%}
.footer__list--plain li{
  display:grid;grid-template-columns:76px minmax(0,1fr);gap:12px;
  font-size:14px;line-height:1.8;
}
.footer__key{color:var(--slate);letter-spacing:.06em}
.footer__value{color:rgba(244,241,234,.9);word-break:break-word}
.footer__note{margin-top:16px;max-width:46ch;font-size:13px;line-height:1.85;color:var(--slate)}
.footer__base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;
  margin-top:clamp(28px,4vw,48px);padding-block:18px;
  border-top:1px solid var(--line-soft);
}
.footer__copy{font-size:13px;letter-spacing:.06em;color:var(--slate)}
.footer__icp{font-size:13px;color:var(--slate)}

/* ===== 11. Motion ===== */
[data-js="on"] [data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
[data-js="on"] [data-reveal].is-revealed{opacity:1;transform: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}
  [data-js="on"] [data-reveal]{opacity:1;transform:none}
}