:root{
  --color-canvas:#FBFBFD;
  --color-panel:#FFFFFF;
  --color-slot:#F3F4FA;
  --color-border:#E4E6F0;
  --color-accent:#5044E8;
  --color-accent-deep:#3B31C4;
  --color-accent-pair:#3EA1F2;
  --color-ink:#14151F;
  --color-muted:#5C6072;
  --color-soft:#8A8FA3;
  --color-success:#12A36B;
  --color-success-soft:#E3F6EC;
  --color-warning:#E09B1A;
  --color-warning-soft:#FFF4DC;
  --color-error:#DA3B4A;
  --color-error-soft:#FCE8EB;
  --color-accent-rgb:80,68,232;
  --color-pair-rgb:62,161,242;
  --color-ink-rgb:20,21,31;
  --color-white-rgb:255,255,255;
  --color-flag-red:#D7263D;
  --color-flag-blue:#1F4FB4;
  --color-flag-navy:#213A8F;
  --color-flag-gold:#F2C84B;
  --font-display:'Inter','Noto Sans SC','Noto Sans JP','Noto Sans KR','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
  --font-body:'Inter','Noto Sans SC','Noto Sans JP','Noto Sans KR','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
  --font-mono:'JetBrains Mono','SFMono-Regular',Menlo,Consolas,'Liberation Mono',monospace;
  --radius-xs:8px;
  --radius-sm:12px;
  --radius-md:16px;
  --radius-lg:20px;
  --radius-xl:24px;
  --radius-pill:999px;
  --shadow-deep:0 32px 72px rgba(var(--color-accent-rgb),.16);
  --shadow-card:0 24px 60px rgba(var(--color-accent-rgb),.10);
  --shadow-soft:0 12px 32px rgba(var(--color-accent-rgb),.08);
  --shadow-button:0 14px 32px rgba(var(--color-accent-rgb),.28);
  --inner-highlight:inset 0 0 0 1px rgba(var(--color-white-rgb),.6);
  --grid-line:rgba(var(--color-ink-rgb),.04);
  --content-width:1280px;
  --reading-width:780px;
  --gutter:32px;
  --header-height:72px;
  --section-space:96px;
  --focus-ring:2px solid var(--color-accent);
  --transition-fast:150ms ease;
  --transition-reveal:620ms cubic-bezier(.22,.7,.22,1);
}
*,
*::before,
*::after{box-sizing:border-box}
html{
  min-width:320px;
  scroll-behavior:smooth;
  scroll-padding-top:88px;
  -webkit-text-size-adjust:100%;
}
html.nav-open{overflow:hidden}
body{
  min-width:320px;
  min-height:100vh;
  margin:0;
  color:var(--color-ink);
  background-color:var(--color-canvas);
  background-image:
    linear-gradient(var(--grid-line) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);
  background-size:32px 32px;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-wrap:break-word;
}
body:has(.float-cta)::after{
  content:"";
  display:block;
  height:calc(88px + env(safe-area-inset-bottom,0px));
}
main,
section,
article,
aside,
header,
footer,
nav{min-width:0}
img,
video{display:block;max-width:100%;height:auto}
svg{display:block}
a{color:inherit;text-decoration:none}
button,
input,
select,
textarea{font:inherit;color:inherit}
button{cursor:pointer}
ul,
ol{margin:0;padding:0}
li{min-width:0}
table{border-collapse:collapse;border-spacing:0}
blockquote,
figure,
p,
h1,
h2,
h3,
h4,
pre{margin:0}
h1,
h2,
h3,
h4{
  font-family:var(--font-display);
  line-height:1.18;
  color:var(--color-ink);
  text-wrap:balance;
}
h1,
h2,
h3{display:block}
h1{font-size:clamp(52px,5.2vw,72px);font-weight:850;letter-spacing:-.02em}
h2{font-size:clamp(34px,3.6vw,52px);font-weight:820;letter-spacing:-.02em}
h3{font-size:clamp(21px,2vw,28px);font-weight:760;letter-spacing:-.015em}
p+ p{margin-top:1em}
code,
kbd,
pre{font-family:var(--font-mono)}
code{overflow-wrap:anywhere}
pre{
  max-width:100%;
  padding:20px;
  overflow-x:auto;
  color:var(--color-ink);
  background:var(--color-slot);
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  -webkit-overflow-scrolling:touch;
}
::selection{color:var(--color-panel);background:var(--color-accent)}
:focus-visible{
  outline:var(--focus-ring);
  outline-offset:3px;
}
.wrap{
  width:100%;
  max-width:var(--content-width);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.reading-wrap{
  width:100%;
  max-width:calc(var(--reading-width) + var(--gutter) * 2);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{
  padding-top:var(--section-space);
  padding-bottom:var(--section-space);
  overflow-x:clip;
}
.section-compact{
  padding-top:64px;
  padding-bottom:64px;
  overflow-x:clip;
}
.section-head{max-width:760px;margin-bottom:48px}
.section-head-center{margin-inline:auto;text-align:center}
.kicker,
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:7px;
  min-height:24px;
  color:var(--color-accent);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
}
.kicker-dot{
  width:7px;
  height:7px;
  flex-shrink:0;
  border-radius:50%;
  background:var(--color-accent);
  box-shadow:0 0 0 5px rgba(var(--color-accent-rgb),.09);
}
.section-lede{
  max-width:680px;
  margin-top:20px;
  color:var(--color-muted);
  font-size:18px;
}
.no-break{white-space:nowrap}
.muted{color:var(--color-muted)}
.soft{color:var(--color-soft)}
.mono{font-family:var(--font-mono)}
.grad-text{
  color:transparent;
  background:linear-gradient(90deg,var(--color-accent),var(--color-accent-pair));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.panel,
.card{
  min-width:0;
  background:var(--color-panel);
  border:1px solid var(--color-border);
  border-radius:var(--radius-xl);
  box-shadow:var(--shadow-card),var(--inner-highlight);
}
.panel-slot{
  min-width:0;
  background:var(--color-slot);
  border-radius:var(--radius-lg);
}
.btn,
.btn-primary,
.btn-secondary,
.btn-quiet{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-width:24px;
  min-height:48px;
  padding:10px 24px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-size:15px;
  font-weight:720;
  line-height:1.2;
  text-align:center;
  transition:transform var(--transition-fast),background-color var(--transition-fast),border-color var(--transition-fast),color var(--transition-fast),box-shadow var(--transition-fast);
}
.btn-primary{
  color:var(--color-panel);
  background:var(--color-accent);
  box-shadow:var(--shadow-button),var(--inner-highlight);
}
.btn-primary:hover{background:var(--color-accent-deep);transform:translateY(-2px)}
.btn-secondary{
  color:var(--color-accent);
  background:var(--color-panel);
  border-color:var(--color-border);
  box-shadow:var(--shadow-soft);
}
.btn-secondary:hover{border-color:var(--color-accent);transform:translateY(-1px)}
.btn-quiet{
  color:var(--color-ink);
  background:transparent;
  padding-inline:12px;
}
.btn-quiet:hover{color:var(--color-accent);background:var(--color-slot)}
.btn[aria-disabled="true"],
.btn:disabled{opacity:.52;pointer-events:none}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  color:var(--color-ink);
  font-weight:650;
}
.link-arrow svg{width:16px;height:16px;flex-shrink:0;color:var(--color-accent);transition:transform var(--transition-fast)}
.link-arrow:hover svg{transform:translateX(3px)}
.badge,
.tag,
.status-pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  min-height:26px;
  max-width:100%;
  padding:3px 10px;
  overflow:hidden;
  border-radius:var(--radius-pill);
  font-size:12px;
  font-weight:700;
  line-height:1.35;
  text-overflow:ellipsis;
}
.badge{color:var(--color-accent);background:rgba(var(--color-accent-rgb),.09)}
.tag{color:var(--color-muted);background:var(--color-slot)}
.status-success{color:var(--color-success);background:var(--color-success-soft)}
.status-warning{color:var(--color-warning);background:var(--color-warning-soft)}
.status-error{color:var(--color-error);background:var(--color-error-soft)}
.fact-number,
[data-counter]{
  display:inline-block;
  min-width:3.5ch;
  font-variant-numeric:tabular-nums;
  text-align:right;
}
.reveal{transition:opacity var(--transition-reveal),transform var(--transition-reveal)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
.tilt,
.card-tilt{transform:rotate(-.45deg)}
.prose{min-width:0;color:var(--color-muted)}
.prose h2{margin-top:2em;margin-bottom:.7em;color:var(--color-ink)}
.prose h3{margin-top:1.7em;margin-bottom:.65em;color:var(--color-ink)}
.prose p,
.prose ul,
.prose ol,
.prose blockquote,
.prose pre,
.prose table{margin-top:1.15em}
.prose ul{padding-left:1.3em;list-style:disc}
.prose ol{padding-left:1.4em}
.prose li+li{margin-top:.5em}
.prose a:not(.btn):not(.btn-primary):not(.btn-secondary){color:var(--color-accent);text-decoration:underline;text-underline-offset:3px}
body:has(.toc-tabs) section[id]{scroll-margin-top:148px}
#server-status{
  position:relative;
  display:block;
  width:100%;
  max-width:100%;
  margin-bottom:32px;
  overflow:hidden;
}
.site-header{
  position:relative;
  z-index:80;
  height:var(--header-height);
  background:var(--color-canvas);
  border-bottom:1px solid rgba(var(--color-ink-rgb),.04);
}
.site-header-inner{
  height:100%;
  display:flex;
  align-items:center;
  gap:22px;
}
.site-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
  min-height:44px;
}
.site-brand img{width:32px;height:32px}
.site-brand-word{
  font-family:var(--font-display);
  font-size:19px;
  font-weight:850;
  letter-spacing:-.02em;
}
.site-brand-local{color:var(--color-muted);font-size:15px;font-weight:570}
.desktop-nav{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:14px;
  margin-left:auto;
}
.nav-link{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:6px;
  min-height:40px;
  color:var(--color-muted);
  font-size:13px;
  font-weight:570;
  white-space:nowrap;
  transition:color var(--transition-fast);
}
.nav-link svg{width:16px;height:16px;flex-shrink:0}
.nav-link:hover,
.nav-link[aria-current="page"]{color:var(--color-ink)}
.header-tools{
  display:flex;
  align-items:center;
  gap:9px;
  flex-shrink:0;
}
.login-link{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:40px;
  padding:7px 18px;
  color:var(--color-accent);
  background:var(--color-panel);
  border:1px solid var(--color-border);
  border-radius:var(--radius-pill);
  font-size:14px;
  font-weight:680;
  box-shadow:0 2px 8px rgba(var(--color-accent-rgb),.06);
}
.login-link:hover{border-color:var(--color-accent)}
.language-box{position:relative}
.language-toggle{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:6px;
  min-width:44px;
  min-height:40px;
  padding:6px 9px;
  color:var(--color-muted);
  background:transparent;
  border:0;
  border-radius:var(--radius-pill);
  font-size:12px;
}
.language-toggle svg{width:12px;height:12px}
.language-menu{
  position:absolute;
  top:calc(100% + 8px);
  right:0;
  width:156px;
  padding:7px;
  background:var(--color-panel);
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-card);
}
.language-menu[hidden]{display:none}
.language-menu a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:7px 10px;
  border-radius:var(--radius-sm);
  color:var(--color-muted);
  font-size:13px;
}
.language-menu a:hover,
.language-menu a[aria-current="true"]{color:var(--color-ink);background:var(--color-slot)}
.menu-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  min-width:44px;
  min-height:44px;
  padding:8px;
  color:var(--color-ink);
  background:transparent;
  border:0;
  border-radius:var(--radius-sm);
}
.menu-toggle svg{width:22px;height:22px}
.mobile-drawer{display:none}
.mobile-veil{display:none}
.site-footer{
  position:relative;
  z-index:2;
  padding-top:72px;
  padding-bottom:28px;
  color:var(--color-muted);
  background:var(--color-panel);
  border-top:1px solid var(--color-border);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.2fr 1fr 1.2fr .8fr;
  gap:44px;
}
.footer-brand{max-width:310px}
.footer-brand .site-brand{color:var(--color-ink)}
.footer-brand p{margin-top:18px;font-size:14px}
.footer-title{
  margin-bottom:15px;
  color:var(--color-ink);
  font-size:13px;
  font-weight:760;
  letter-spacing:.04em;
}
.footer-links{list-style:none}
.footer-links li+li{margin-top:8px}
.footer-links a{
  display:inline-flex;
  align-items:center;
  min-height:30px;
  font-size:13px;
}
.footer-links a:hover{color:var(--color-accent)}
.footer-keywords{display:flex;flex-wrap:wrap;gap:8px;list-style:none}
.footer-keywords a{
  display:inline-flex;
  align-items:center;
  min-height:30px;
  padding:3px 9px;
  background:var(--color-slot);
  border-radius:var(--radius-pill);
  font-size:12px;
}
.footer-languages{display:flex;flex-direction:column;align-items:flex-start;gap:4px}
.footer-languages a{display:inline-flex;align-items:center;min-height:30px;font-size:13px}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  margin-top:52px;
  padding-top:20px;
  border-top:1px solid var(--color-border);
  font-size:12px;
}
.footer-legal{display:flex;flex-wrap:wrap;gap:18px}
@media (max-width:1180px){
  .desktop-nav{gap:9px}
  .nav-link{font-size:12px}
  .language-toggle span{display:none}
}
@media (max-width:1040px){
  .desktop-nav{display:none}
  .header-tools{margin-left:auto}
  .menu-toggle{display:inline-flex}
  .mobile-veil{
    position:fixed;
    inset:var(--header-height) 0 0;
    z-index:81;
    background:rgba(var(--color-ink-rgb),.18);
  }
  .mobile-veil.is-open{display:block}
  .mobile-drawer{
    position:fixed;
    top:var(--header-height);
    right:0;
    z-index:82;
    display:none;
    width:min(390px,100%);
    max-width:100%;
    max-height:calc(100dvh - var(--header-height));
    padding:12px var(--gutter) 24px;
    overflow-y:auto;
    overscroll-behavior:contain;
    background:var(--color-panel);
    border-left:1px solid var(--color-border);
    border-bottom:1px solid var(--color-border);
    box-shadow:var(--shadow-deep);
  }
  .mobile-drawer.is-open{display:block}
  .mobile-drawer a{
    display:flex;
    align-items:center;
    width:100%;
    min-height:48px;
    padding:10px 12px;
    border-radius:var(--radius-sm);
    color:var(--color-muted);
  }
  .mobile-drawer a svg{width:18px;height:18px;margin-right:9px;flex-shrink:0}
  .mobile-drawer a:hover,
  .mobile-drawer a[aria-current="page"]{color:var(--color-ink);background:var(--color-slot)}
  .mobile-drawer .drawer-languages{
    margin-top:10px;
    padding-top:10px;
    border-top:1px solid var(--color-border);
  }
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  :root{--section-space:72px}
  h1{font-size:clamp(28px,9.8vw,40px);line-height:1.12;letter-spacing:-.02em}
  h2{font-size:clamp(27px,8vw,38px)}
  .section-lede{font-size:17px}
  .footer-grid{gap:34px}
}
@media (max-width:640px){
  :root{--gutter:18px;--header-height:68px}
  html{scroll-padding-top:82px}
  .no-break{white-space:normal}
  .tilt,
  .card-tilt{transform:none}
  .wrap,
  .reading-wrap{padding-inline:var(--gutter)}
  .site-brand-local{display:none}
  .language-box{display:none}
  .login-link{min-height:38px;padding-inline:15px}
  .mobile-drawer{padding-inline:var(--gutter)}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{align-items:flex-start;flex-direction:column}
  .btn,
  .btn-primary,
  .btn-secondary{max-width:100%}
  .section{padding-top:64px;padding-bottom:64px}
  .section-compact{padding-top:48px;padding-bottom:48px}
  [class*="halo"],
  [class*="watermark"],
  [class*="decor"]{max-width:100%}
}
@media (max-width:380px){
  :root{--gutter:16px}
  .site-brand-word{font-size:17px}
  .login-link{padding-inline:12px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,
  *::before,
  *::after{scroll-behavior:auto!important;transition-duration:0s!important;animation-duration:0s!important}
  .reveal,
  .reveal.pending{opacity:1;transform:none}
}