*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,figure,blockquote,ol,ul,dl,dd,fieldset{margin:0}
ol,ul{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
:root{
  --ink:#07090C;
  --graphite:#12161C;
  --steel:#1B2430;
  --lime:#B6FF3C;
  --blue:#2FD4FF;
  --orange:#FF7A2F;
  --paper:#F2F5F2;
  --mute:#8A939E;
  --hair:#2A313A;
  --ivory:#E8E4D8;
  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-sans:"HarmonyOS Sans","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --fs-1:12px;
  --fs-2:14px;
  --fs-3:16px;
  --fs-4:20px;
  --fs-5:28px;
  --fs-6:40px;
  --fs-7:64px;
  --fs-8:clamp(72px,9vw,160px);
  --shell:1300px;
  --gutter:clamp(18px,3.4vw,48px);
  --r:2px;
  --dur:320ms;
  --ease:cubic-bezier(.2,.8,.2,1);
  --header-h:76px;
}
html[data-mode="contrast"]{
  --ink:#000000;
  --graphite:#0A0E13;
  --steel:#111A23;
  --paper:#FFFFFF;
  --mute:#C7D0CB;
  --hair:#4A5663;
  --lime:#D2FF6B;
  --blue:#6FE4FF;
  --orange:#FF9558;
}
html{background:var(--ink)}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body{
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-sans);
  font-size:clamp(16px,0.35vw + 15px,18px);
  line-height:1.75;
  letter-spacing:.01em;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,.display-1,.display-2{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.02em;
}
::selection{background:var(--lime);color:#07090C}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px}
a:focus-visible,button:focus-visible{outline:2px solid var(--lime);outline-offset:3px}
#main-content{display:block;padding-top:calc(var(--header-h) + 8px);scroll-margin-top:calc(var(--header-h) + 16px)}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:6px;left:6px;z-index:300;
  transform:translateY(-200%);
  padding:10px 18px;
  background:var(--lime);color:#07090C;
  font-size:var(--fs-2);font-weight:800;letter-spacing:.04em;
  border-radius:var(--r);
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0)}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  pointer-events:none;
}
.progress{
  position:fixed;top:0;left:0;right:0;height:2px;
  background:rgba(42,49,58,.55);
  pointer-events:none;z-index:130;
}
.progress__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--lime),var(--blue));
  transition:width 120ms linear;
}
.header-shell{
  position:relative;
  max-width:var(--shell);
  margin-inline:auto;
  padding:10px var(--gutter) 0;
}
.capsule{
  pointer-events:auto;
  display:flex;align-items:center;
  gap:clamp(8px,1.4vw,22px);
  padding:8px 8px 8px 10px;
  background:rgba(18,22,28,.88);
  border:1px solid var(--hair);
  border-radius:999px;
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:padding var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.site-header[data-stuck="true"] .capsule{
  padding:4px 6px 4px 8px;
  background:rgba(10,14,19,.95);
  border-color:#36434F;
}
html[data-mode="contrast"] .capsule{background:#0A0E13;border-color:#4A5663}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  flex:0 0 auto;min-width:0;padding-right:4px;
}
.brand__mark{
  display:grid;place-items:center;
  width:38px;height:38px;
  background:var(--lime);color:#07090C;
  font-family:var(--font-sans);font-weight:900;font-size:15px;letter-spacing:.02em;
  clip-path:polygon(0 0,100% 0,86% 100%,0 100%);
  transition:height var(--dur) var(--ease),width var(--dur) var(--ease);
}
.site-header[data-stuck="true"] .brand__mark{width:34px;height:32px;font-size:13px}
.brand__text{display:flex;flex-direction:column;line-height:1.12;min-width:0}
.brand__name{font-family:var(--font-display);font-weight:800;font-size:16px;letter-spacing:.02em;white-space:nowrap}
.brand__tag{font-size:10px;color:var(--mute);letter-spacing:.14em;white-space:nowrap}

.nav{flex:1 1 auto;display:flex;justify-content:center;min-width:0;pointer-events:auto}
.nav__list{display:flex;align-items:center;gap:2px}
.nav__item{display:block}
.nav__link{
  position:relative;display:inline-block;
  padding:8px 12px;
  font-size:var(--fs-2);font-weight:600;
  color:var(--mute);
  border-radius:var(--r);
  white-space:nowrap;
  transition:color 180ms var(--ease),background-color 180ms var(--ease);
}
.nav__link:hover{color:var(--paper);background:var(--steel)}
.nav__link[aria-current="page"]{color:var(--lime)}
.nav__link[aria-current="page"]::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--lime);transform:skewX(-12deg);
}

.header-tools{display:flex;align-items:center;gap:6px;flex:0 0 auto}
.chapter{
  display:none;align-items:center;gap:8px;
  padding:5px 12px;
  border-left:2px solid var(--lime);
  background:rgba(27,36,48,.92);
  border-radius:var(--r);
  font-size:var(--fs-1);
  white-space:nowrap;overflow:hidden;max-width:200px;
}
.site-header[data-stuck="true"] .chapter{display:inline-flex}
.chapter__label{color:var(--mute);letter-spacing:.12em}
.chapter__name{color:var(--paper);font-weight:700;overflow:hidden;text-overflow:ellipsis}

.tool-btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 12px;
  border:1px solid var(--hair);
  border-radius:999px;
  color:var(--mute);
  font-size:var(--fs-1);font-weight:700;letter-spacing:.08em;
  transition:color 180ms var(--ease),border-color 180ms var(--ease),background-color 180ms var(--ease);
}
.tool-btn:hover{color:var(--paper);border-color:#3E4C5B;background:rgba(27,36,48,.7)}
.tool-btn[aria-pressed="true"]{background:var(--lime);border-color:var(--lime);color:#07090C}
.tool-btn__grid{
  display:block;width:12px;height:10px;
  background:
    linear-gradient(currentColor,currentColor) 0 0/100% 1.5px no-repeat,
    linear-gradient(currentColor,currentColor) 0 50%/100% 1.5px no-repeat,
    linear-gradient(currentColor,currentColor) 0 100%/100% 1.5px no-repeat;
}
.tool-btn__text{display:inline-block}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:9px 18px;
  border:1px solid transparent;
  border-radius:var(--r);
  font-size:var(--fs-2);font-weight:800;letter-spacing:.02em;
  transition:background-color 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease);
}
.btn--cta{background:var(--lime);color:#07090C;border-color:var(--lime)}
.btn--cta:hover{background:transparent;color:var(--lime)}
.btn--ghost{border-color:var(--hair);color:var(--paper)}
.btn--ghost:hover{border-color:var(--lime);color:var(--lime);background:rgba(182,255,60,.06)}

.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;
  border:1px solid var(--hair);
  border-radius:999px;
  color:var(--paper);
  transition:border-color 180ms var(--ease),background-color 180ms var(--ease);
}
.nav-toggle:hover{border-color:var(--lime)}
.nav-toggle__bars{position:relative;display:block;width:16px;height:2px;background:var(--paper);transition:background-color 160ms var(--ease)}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--paper);
  transition:transform 200ms var(--ease);
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}

/* ---------- index panel ---------- */
.index-panel{
  position:fixed;
  top:calc(var(--header-h) + 8px);
  right:var(--gutter);
  width:min(320px,calc(100vw - 32px));
  max-height:min(70vh,520px);
  overflow-y:auto;
  display:none;
  padding:16px 10px 16px 16px;
  background:var(--graphite);
  border:1px solid var(--hair);
  border-radius:var(--r);
  box-shadow:0 28px 60px rgba(0,0,0,.6);
  pointer-events:auto;
  z-index:125;
}
.index-panel.is-open{display:block}
.index-panel__title{font-size:var(--fs-1);letter-spacing:.18em;color:var(--lime);margin-bottom:10px;font-weight:700}
.index-panel__list{display:grid;gap:2px}
.index-link{
  display:flex;align-items:baseline;gap:10px;
  width:100%;text-align:left;
  padding:8px 10px;
  border-left:2px solid transparent;
  border-radius:0 var(--r) var(--r) 0;
  color:var(--mute);
  font-size:var(--fs-2);line-height:1.45;
  transition:color 160ms var(--ease),background-color 160ms var(--ease),border-color 160ms var(--ease);
}
.index-link:hover{color:var(--paper);background:var(--steel)}
.index-link.is-active{color:var(--lime);border-left-color:var(--lime);background:rgba(182,255,60,.07)}
.index-link__num{font-variant-numeric:tabular-nums;font-weight:700;color:#5A6774;min-width:18px}
.index-link__text{display:block}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  background:var(--ivory);
  color:#0A0C10;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--lime) 0 38%,var(--blue) 38% 62%,#0A0C10 62% 100%);
}
.footer-shell{
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(40px,5vw,76px) var(--gutter) 26px;
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1.6fr);
  gap:clamp(28px,4vw,64px);
  padding-bottom:clamp(26px,3vw,44px);
  border-bottom:1px solid rgba(10,12,16,.16);
}
.footer-brand__mark{
  display:inline-grid;place-items:center;
  width:52px;height:52px;
  background:var(--lime);color:#07090C;
  font-weight:900;font-size:17px;letter-spacing:.02em;
  clip-path:polygon(0 0,100% 0,86% 100%,0 100%);
}
.footer-brand__tagline{
  margin-top:18px;
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(24px,3.2vw,40px);line-height:1.28;letter-spacing:-.02em;
  max-width:14em;color:#07090C;
}
.footer-brand__note{margin-top:12px;font-size:var(--fs-2);color:#4A5259;letter-spacing:.06em}
.footer-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,2.4vw,32px)}
.footer-col__title{
  font-family:var(--font-sans);font-size:var(--fs-1);font-weight:700;
  letter-spacing:.18em;color:#5A636B;margin-bottom:14px;
}
.footer-col__list{display:grid;gap:8px}
.footer-link{
  display:inline-block;
  font-size:var(--fs-3);font-weight:600;color:#0A0C10;
  padding-bottom:2px;border-bottom:1px solid transparent;
  transition:border-color 180ms var(--ease),color 180ms var(--ease);
}
.footer-link:hover,.footer-link:focus-visible{border-bottom-color:#0A0C10}
.footer-contact{
  display:grid;gap:10px;
  padding:clamp(22px,3vw,36px) 0;
  border-bottom:1px solid rgba(10,12,16,.16);
}
.footer-contact__row{
  display:grid;grid-template-columns:88px minmax(0,1fr);gap:12px;
  font-size:var(--fs-2);line-height:1.7;
}
.footer-contact__key{color:#5A636B;letter-spacing:.08em}
.footer-contact__val{color:#0A0C10;font-weight:600;word-break:break-word}
.footer-contact__note{font-size:var(--fs-1);color:#5A636B;line-height:1.7}
.to-top{
  justify-self:start;margin-top:8px;
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;
  border:1px solid #0A0C10;border-radius:var(--r);
  font-size:var(--fs-2);font-weight:800;color:#0A0C10;
  transition:background-color 180ms var(--ease),color 180ms var(--ease);
}
.to-top::after{content:"↑";font-weight:700}
.to-top:hover{background:#0A0C10;color:var(--ivory)}
.footer-legal{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  padding-top:22px;
  font-size:var(--fs-1);color:#4C555C;line-height:1.7;
}
.footer-legal__line{max-width:62ch}

/* ---------- shared page primitives ---------- */
.container{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(48px,6vw,110px)}
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2vw,32px)}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-9{grid-column:span 9}
.col-12{grid-column:span 12}
.stack{display:grid;gap:var(--stack-gap,16px)}
.rule{height:1px;border:0;background:var(--hair);margin:0}
.kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-size:var(--fs-1);font-weight:800;letter-spacing:.2em;
  color:var(--lime);
}
.kicker::before{content:"";width:28px;height:2px;background:var(--lime);transform:skewX(-12deg)}
.display-1{font-size:var(--fs-8);line-height:1.02}
.display-2{font-size:clamp(40px,5.2vw,72px);line-height:1.1}
.lede{
  font-size:clamp(17px,1.2vw,20px);line-height:1.75;
  color:var(--paper);max-width:38em;
}
.num{
  font-family:var(--font-sans);font-weight:800;
  font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;
  letter-spacing:-.01em;
}
.card{
  position:relative;
  background:var(--graphite);
  border:1px solid var(--hair);
  border-radius:var(--r);
  padding:clamp(18px,2vw,28px);
}
.card::before{
  content:"";position:absolute;top:0;left:0;
  width:40px;height:2px;background:var(--lime);
}
.card--paper{background:var(--ivory);color:#0A0C10;border-color:#C9C3B2}
.card--paper::before{background:#0A0C10}
.slab{
  background:var(--ivory);color:#0A0C10;
  padding-block:clamp(44px,5vw,88px);
}
.slab a{text-decoration:underline;text-underline-offset:4px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;
  border:1px solid var(--hair);border-radius:999px;
  font-size:var(--fs-1);font-weight:700;letter-spacing:.06em;
  color:var(--mute);
}
.tag--live{color:var(--orange);border-color:rgba(255,122,47,.45);background:rgba(255,122,47,.08)}
.tag--data{color:var(--blue);border-color:rgba(47,212,255,.42);background:rgba(47,212,255,.07)}
.table-wrap{
  overflow-x:auto;
  border:1px solid var(--hair);
  border-radius:var(--r);
  -webkit-overflow-scrolling:touch;
}
table.data{font-size:var(--fs-2);min-width:520px}
.data thead th{
  background:var(--steel);
  text-align:left;padding:10px 14px;
  font-weight:700;color:var(--paper);white-space:nowrap;
}
.data tbody td{padding:10px 14px;border-top:1px solid var(--hair)}
.data tbody tr:hover{background:rgba(182,255,60,.05)}
.data .num{color:var(--blue)}
.media{
  position:relative;overflow:hidden;
  border-radius:var(--r);
  aspect-ratio:16/9;
  background-color:var(--graphite);
  background-image:
    linear-gradient(var(--hair) 1px,transparent 1px),
    linear-gradient(90deg,var(--hair) 1px,transparent 1px);
  background-size:56px 56px;
}
.media img,.media picture,.media video{width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:21/9}
.media--square{aspect-ratio:1/1}
.media--portrait{aspect-ratio:3/4}
.media__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:12px 14px;
  font-size:var(--fs-1);color:var(--paper);
  background:linear-gradient(transparent,rgba(7,9,12,.92));
}
.media__tag{
  position:absolute;top:12px;left:12px;
  padding:4px 10px;border-radius:999px;
  background:var(--lime);color:#07090C;
  font-size:var(--fs-1);font-weight:800;letter-spacing:.08em;
}
.breadcrumbs{font-size:var(--fs-1);color:var(--mute)}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:0}
.breadcrumbs li{display:inline-flex;align-items:center}
.breadcrumbs li:not(:last-child)::after{content:"/";margin-inline:8px;color:#46525E}
.breadcrumbs a:hover{color:var(--lime)}
.breadcrumbs [aria-current="page"]{color:var(--paper)}
.note{
  border-left:2px solid var(--blue);
  padding-left:14px;
  font-size:var(--fs-2);color:var(--mute);line-height:1.75;
}
[data-section]{scroll-margin-top:calc(var(--header-h) + 24px)}
[data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .brand__tag{display:none}
  .nav__link{padding:8px 10px;font-size:13px}
  .chapter{max-width:150px}
}
@media (max-width:980px){
  :root{--header-h:72px}
  .nav{
    position:fixed;
    top:calc(var(--header-h) + 6px);
    left:var(--gutter);right:var(--gutter);
    display:none;
    padding:10px;
    background:var(--graphite);
    border:1px solid var(--hair);
    border-radius:var(--r);
    box-shadow:0 28px 60px rgba(0,0,0,.65);
    max-height:calc(100vh - var(--header-h) - 32px);
    overflow-y:auto;
    z-index:126;
  }
  .nav[data-open="true"]{display:block}
  .nav__list{flex-direction:column;align-items:stretch;gap:2px}
  .nav__link{display:block;padding:13px 14px;font-size:var(--fs-4);border-radius:var(--r)}
  .nav__link[aria-current="page"]{background:rgba(182,255,60,.09);border-left:2px solid var(--lime)}
  .nav__link[aria-current="page"]::after{display:none}
  .nav-toggle{display:inline-flex}
  .chapter{display:none !important}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9{grid-column:span 12}
  .footer-top{grid-template-columns:minmax(0,1fr)}
  .footer-nav{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (max-width:760px){
  .header-tools{gap:4px}
  .btn--cta{padding:8px 13px;font-size:13px}
  .tool-btn{padding:6px 10px}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  .footer-contact__row{grid-template-columns:minmax(0,1fr);gap:2px}
}
@media (max-width:600px){
  .header-tools .btn--cta{display:none}
  .brand__mark{width:34px;height:34px;font-size:13px}
  .site-header[data-stuck="true"] .brand__mark{width:32px;height:30px}
  .brand__name{font-size:15px}
  .nav-toggle{width:38px;height:38px}
  .footer-legal{flex-direction:column;gap:6px}
}
@media (max-width:460px){
  .tool-btn--mode{display:none}
  .footer-nav{grid-template-columns:minmax(0,1fr)}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html{scroll-behavior:auto}
  [data-reveal]{opacity:1;transform:none}
  .progress__bar{transition:none}
}