:root{
  --color-bg:#141214;
  --color-panel:#1B181B;
  --color-panel-raised:#232025;
  --color-border:#332E34;
  --color-accent:#E266C9;
  --color-accent-deep:#A63E92;
  --color-text:#F2EDF1;
  --color-muted:#A79FA6;
  --color-success:#5FC98F;
  --color-warning:#E0A94F;
  --color-error:#E25B5B;
  --color-white:#FFFFFF;
  --color-shadow:#080708;
  --color-overlay:#0E0C0E;
  --color-flag-red:#C7362F;
  --color-flag-red-alt:#C22E3A;
  --color-flag-blue:#2B3A73;
  --color-flag-white:#F4F1EE;
  --color-flag-black:#221F22;
  --color-flag-gold:#D9A83C;
  --font-display:Georgia,'Times New Roman','Songti SC','Noto Serif CJK SC',SimSun,serif;
  --font-body:'Inter','Noto Sans SC','PingFang SC','Microsoft YaHei',-apple-system,sans-serif;
  --font-mono:'JetBrains Mono','SFMono-Regular',Consolas,'Courier New',monospace;
  --radius-sm:6px;
  --radius-md:10px;
  --radius-lg:14px;
  --radius-pill:999px;
  --shadow-panel:0 20px 54px color-mix(in srgb,var(--color-shadow) 58%,transparent);
  --shadow-accent:0 0 26px color-mix(in srgb,var(--color-accent) 38%,transparent);
  --header-height:60px;
  --content-max:1360px;
  --reading-max:820px;
  --gutter:clamp(16px,3vw,28px);
  --section-space:clamp(72px,9vw,126px);
  --toc-offset:76px;
  --transition-fast:180ms ease;
}
*,
*::before,
*::after{box-sizing:border-box}
html{
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-height) + 16px);
  background:var(--color-bg);
}
html.nav-open{overflow:hidden}
body{
  margin:0;
  min-width:320px;
  overflow-x:hidden;
  background:var(--color-bg);
  color:var(--color-text);
  font-family:var(--font-body);
  font-size:15px;
  line-height:1.68;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:80;
  pointer-events:none;
  opacity:.05;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}
img,svg,video{display:block;max-width:100%}
img{height:auto}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0}
ul{list-style:none}
p,figure,blockquote{margin:0}
h1,h2,h3,h4{margin:0;color:var(--color-text);text-wrap:balance}
h1,.display-title{
  font-family:var(--font-display);
  font-size:clamp(52px,5.2vw,72px);
  font-weight:400;
  letter-spacing:.01em;
  line-height:1.12;
}
h2{
  font-family:var(--font-display);
  font-size:clamp(34px,4vw,52px);
  font-weight:400;
  line-height:1.18;
}
h3{
  font-family:var(--font-display);
  font-size:clamp(23px,2.4vw,31px);
  font-weight:400;
  line-height:1.28;
}
h4{font-size:18px;line-height:1.35}
small{font-size:12px}
strong{font-weight:650}
code,kbd,samp,.mono{font-family:var(--font-mono)}
code{overflow-wrap:anywhere}
pre{
  max-width:100%;
  overflow-x:auto;
  padding:20px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-sm);
  background:var(--color-panel);
  color:var(--color-text);
  -webkit-overflow-scrolling:touch;
}
pre code{overflow-wrap:normal}
::selection{background:var(--color-accent);color:var(--color-bg)}
:where(a,button,input,select,textarea,summary,[role="tab"]):focus-visible{
  outline:2px solid var(--color-accent);
  outline-offset:3px;
  border-radius:var(--radius-sm);
}
.no-break{white-space:nowrap}
.text-accent,.hero-highlight{
  color:var(--color-accent);
  text-shadow:0 0 20px color-mix(in srgb,var(--color-accent) 42%,transparent);
}
.text-muted{color:var(--color-muted)}
.wrap{
  width:100%;
  max-width:var(--content-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.reading-wrap{
  width:100%;
  max-width:calc(var(--reading-max) + var(--gutter) * 2);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{
  position:relative;
  padding-top:var(--section-space);
  padding-bottom:var(--section-space);
  overflow-x:clip;
}
.section-head{max-width:760px;margin-bottom:42px}
.section-head p{max-width:680px;margin-top:16px;color:var(--color-muted);font-size:17px}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  min-height:28px;
  margin-bottom:14px;
  color:var(--color-accent);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
}
.eyebrow::before{
  content:"";
  width:19px;
  height:2px;
  flex-shrink:0;
  background:var(--color-accent);
  box-shadow:var(--shadow-accent);
}
.panel,.card{
  min-width:0;
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  background:var(--color-panel);
}
.panel-raised{
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  background:var(--color-panel-raised);
  box-shadow:var(--shadow-panel);
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  max-width:100%;
  min-height:28px;
  overflow:hidden;
  padding:4px 12px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-pill);
  background:var(--color-panel);
  color:var(--color-muted);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
}
.badge-dot{
  width:7px;
  height:7px;
  flex-shrink:0;
  border-radius:50%;
  background:var(--color-success);
  box-shadow:0 0 10px color-mix(in srgb,var(--color-success) 48%,transparent);
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  min-width:24px;
  min-height:46px;
  padding:11px 28px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-weight:650;
  line-height:1.2;
  text-align:center;
  transition:transform var(--transition-fast),border-color var(--transition-fast),box-shadow var(--transition-fast),background var(--transition-fast);
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{
  border-color:var(--color-accent);
  background:var(--color-accent);
  color:var(--color-bg);
  box-shadow:var(--shadow-accent);
}
.btn-primary:hover{box-shadow:0 0 34px color-mix(in srgb,var(--color-accent) 52%,transparent)}
.btn-secondary{
  border-color:var(--color-border);
  background:var(--color-panel);
  color:var(--color-text);
}
.btn-secondary:hover{border-color:var(--color-muted)}
.btn-quiet{
  border-color:transparent;
  background:transparent;
  color:var(--color-muted);
}
.btn-quiet:hover{color:var(--color-text)}
.btn-small{min-height:38px;padding:8px 18px;font-size:14px}
.btn[aria-disabled="true"],.btn:disabled{opacity:.45;pointer-events:none}
.site-head{
  position:relative;
  z-index:70;
  height:var(--header-height);
  border-bottom:1px solid var(--color-border);
  background:var(--color-bg);
}
.site-head-inner{
  position:relative;
  display:flex;
  align-items:center;
  gap:24px;
  width:100%;
  max-width:var(--content-max);
  height:100%;
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.site-brand{
  display:flex;
  flex:0 0 auto;
  align-items:center;
  gap:10px;
  min-height:32px;
}
.site-brand img{width:27px;height:27px;flex-shrink:0}
.brand-word{font-size:16.5px;font-weight:650;letter-spacing:.03em}
.brand-local{color:var(--color-muted);font-size:13px;font-weight:400}
.desktop-nav{display:flex;align-items:center;gap:2px}
.desktop-nav a{
  display:flex;
  align-items:center;
  min-height:38px;
  padding:7px 14px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  color:var(--color-muted);
  font-size:14px;
  white-space:nowrap;
}
.desktop-nav a:hover{color:var(--color-text)}
.desktop-nav a.is-active{
  border-color:var(--color-border);
  background:var(--color-panel-raised);
  color:var(--color-text);
}
.header-tools{
  display:flex;
  align-items:center;
  gap:10px;
  margin-left:auto;
}
.language-switch{position:relative}
.language-button{
  display:flex;
  align-items:center;
  justify-content:center;
  min-width:44px;
  min-height:38px;
  padding:7px 10px;
  border:1px solid transparent;
  border-radius:var(--radius-sm);
  background:transparent;
  color:var(--color-muted);
  font-size:13px;
}
.language-menu{
  position:absolute;
  top:calc(100% + 8px);
  right:0;
  z-index:90;
  display:none;
  width:148px;
  padding:6px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  background:var(--color-panel-raised);
  box-shadow:var(--shadow-panel);
}
.language-switch.is-open .language-menu{display:block}
.language-menu a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:8px 10px;
  border-radius:var(--radius-sm);
  color:var(--color-muted);
}
.language-menu a:hover,.language-menu a[aria-current="true"]{background:var(--color-panel);color:var(--color-text)}
.header-login{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:38px;
  padding:7px 19px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-pill);
  background:var(--color-panel);
  color:var(--color-text);
  font-size:14px;
  white-space:nowrap;
}
.header-login:hover{border-color:var(--color-accent);box-shadow:0 0 14px color-mix(in srgb,var(--color-accent) 24%,transparent)}
.menu-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:44px;
  min-width:44px;
  height:44px;
  min-height:44px;
  padding:0;
  border:1px solid var(--color-border);
  border-radius:var(--radius-sm);
  background:var(--color-panel);
}
.menu-toggle-lines,.menu-toggle-lines::before,.menu-toggle-lines::after{
  display:block;
  width:18px;
  height:1px;
  background:var(--color-text);
  transition:transform var(--transition-fast),opacity var(--transition-fast);
}
.menu-toggle-lines{position:relative}
.menu-toggle-lines::before,.menu-toggle-lines::after{content:"";position:absolute;left:0}
.menu-toggle-lines::before{top:-6px}
.menu-toggle-lines::after{top:6px}
.menu-toggle[aria-expanded="true"] .menu-toggle-lines{background:transparent}
.menu-toggle[aria-expanded="true"] .menu-toggle-lines::before{top:0;transform:rotate(45deg)}
.menu-toggle[aria-expanded="true"] .menu-toggle-lines::after{top:0;transform:rotate(-45deg)}
.mobile-nav{
  position:absolute;
  top:var(--header-height);
  left:0;
  right:0;
  z-index:82;
  display:none;
  max-height:calc(100dvh - var(--header-height));
  overflow-y:auto;
  overscroll-behavior:contain;
  padding:10px var(--gutter) 18px;
  border-bottom:1px solid var(--color-border);
  background:var(--color-panel-raised);
}
.mobile-nav.is-open{display:block}
.mobile-nav a{
  display:flex;
  align-items:center;
  width:100%;
  min-height:48px;
  padding:11px 12px;
  border-radius:var(--radius-sm);
  color:var(--color-muted);
}
.mobile-nav a:hover,.mobile-nav a.is-active{background:var(--color-panel);color:var(--color-text)}
.mobile-nav-group{margin-top:8px;padding-top:8px;border-top:1px solid var(--color-border)}
.mobile-nav-label{padding:8px 12px 4px;color:var(--color-muted);font-family:var(--font-mono);font-size:10px;letter-spacing:.14em}
.nav-veil{
  position:fixed;
  inset:var(--header-height) 0 0;
  z-index:60;
  display:none;
  background:color-mix(in srgb,var(--color-overlay) 86%,transparent);
}
.nav-veil.is-open{display:block}
.site-footer{
  position:relative;
  z-index:2;
  overflow-x:clip;
  border-top:1px solid var(--color-border);
  background:var(--color-panel);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.35fr 1fr 1.2fr .9fr;
  gap:42px;
  padding-top:58px;
  padding-bottom:44px;
}
.footer-brand{max-width:360px}
.footer-brand p{margin-top:16px;color:var(--color-muted)}
.footer-title{
  margin-bottom:14px;
  color:var(--color-text);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
}
.footer-links{display:grid;gap:8px}
.footer-links a{
  display:inline-flex;
  align-items:center;
  min-height:30px;
  color:var(--color-muted);
}
.footer-links a:hover{color:var(--color-text)}
.footer-keywords{display:flex;flex-wrap:wrap;gap:8px}
.footer-keywords a{
  display:inline-flex;
  align-items:center;
  min-height:30px;
  max-width:100%;
  padding:4px 10px;
  overflow:hidden;
  border:1px solid var(--color-border);
  border-radius:var(--radius-pill);
  color:var(--color-muted);
  font-size:12px;
}
.footer-keywords a:hover{border-color:var(--color-accent);color:var(--color-text)}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding-top:22px;
  padding-bottom:26px;
  border-top:1px solid var(--color-border);
  color:var(--color-muted);
  font-size:12px;
}
.footer-legal{display:flex;flex-wrap:wrap;gap:18px}
.footer-legal a{min-height:24px}
.reveal{transition:opacity .64s ease,transform .64s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
.prose{min-width:0;color:var(--color-muted)}
.prose>*+*{margin-top:1.15em}
.prose h2,.prose h3,.prose h4{margin-top:1.8em;color:var(--color-text)}
.prose a{color:var(--color-accent);text-decoration:underline;text-underline-offset:3px}
.prose ul,.prose ol{padding-left:1.4em}
.prose ul{list-style:disc}
.prose li+li{margin-top:.45em}
.prose table{border-collapse:collapse}
.prose blockquote{padding-left:18px;border-left:2px solid var(--color-accent)}
.tilt,.tilt-card{transform:rotate(.35deg)}
@media (max-width:1120px){
  .desktop-nav a{padding-inline:9px;font-size:13px}
  .brand-local{display:none}
  .footer-grid{grid-template-columns:1.3fr 1fr 1fr}
  .footer-grid>*:last-child{grid-column:2/4}
}
@media (max-width:900px){
  .desktop-nav,.language-switch{display:none}
  .header-tools{margin-left:auto}
  .menu-toggle{display:flex}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-grid>*:last-child{grid-column:auto}
}
@media (max-width:768px){
  h1,.display-title{font-size:clamp(28px,9vw,40px);line-height:1.14;letter-spacing:0}
  h2{font-size:clamp(29px,8vw,40px)}
  .section-head p{font-size:16px}
}
@media (max-width:640px){
  :root{--gutter:16px;--section-space:66px}
  body{font-size:14px}
  .site-head-inner{gap:8px}
  .brand-word{font-size:15px}
  .header-tools{gap:7px}
  .header-login{padding-inline:14px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{align-items:flex-start;flex-direction:column}
  .tilt,.tilt-card{transform:none}
  pre{padding:16px}
}
@media (max-width:370px){
  .brand-local{display:none}
  .header-login{padding-inline:11px;font-size:13px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal,.reveal.pending{opacity:1!important;transform:none!important}
}