:root{
  --color-page:#FAF3E4;
  --color-glow:#F3E6D0;
  --color-surface:#FFFCF5;
  --color-surface-alt:#F1E6D2;
  --color-border:#E3D5BD;
  --color-accent:#1495A8;
  --color-accent-end:#35C7A8;
  --color-accent-dark:#0E6F80;
  --color-text:#2B2116;
  --color-muted:#6E6050;
  --color-success:#2F8F5B;
  --color-warning:#D9931F;
  --color-error:#C7402F;
  --color-white:#FFFFFF;
  --color-flag-red:#CF2E3D;
  --color-flag-blue:#1F4A9A;
  --color-flag-green:#147D57;
  --color-shadow-soft:rgba(43,33,22,.08);
  --color-shadow-mid:rgba(43,33,22,.16);
  --color-shadow-strong:rgba(43,33,22,.28);
  --color-accent-soft:rgba(20,149,168,.10);
  --color-accent-mid:rgba(20,149,168,.22);
  --color-accent-halo:rgba(20,149,168,.09);
  --color-accent-line:rgba(20,149,168,.38);
  --color-highlight:rgba(255,255,255,.72);
  --color-highlight-strong:rgba(255,255,255,.92);
  --font-display:'Inter','Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --font-body:'Inter','Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --font-mono:'JetBrains Mono','SFMono-Regular',Menlo,Consolas,monospace;
  --radius-xs:6px;
  --radius-sm:8px;
  --radius-md:12px;
  --radius-lg:16px;
  --radius-xl:20px;
  --radius-pill:999px;
  --shadow-card:0 1px 0 var(--color-highlight) inset,0 1px 2px var(--color-shadow-soft);
  --shadow-float:0 1px 0 var(--color-highlight-strong) inset,0 12px 28px -14px var(--color-shadow-mid),0 18px 40px -20px var(--color-accent-mid);
  --shadow-frame:0 1px 0 var(--color-highlight-strong) inset,0 34px 72px -34px var(--color-shadow-strong),0 56px 120px -44px var(--color-accent-mid);
  --shadow-button:0 1px 0 var(--color-highlight) inset,0 10px 22px -10px var(--color-accent-mid);
  --header-height:72px;
  --content-width:1320px;
  --reading-width:820px;
  --gutter:clamp(16px,3vw,40px);
  --section-space:clamp(72px,9vw,128px);
  --focus-ring:2px solid var(--color-accent);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
html,body{margin:0;min-width:320px}
html.nav-open{overflow:hidden}
body{
  overflow-x:clip;
  background:var(--color-page);
  color:var(--color-text);
  font:16px/1.65 var(--font-body);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
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}
p{margin:0 0 1.25em}
ul,ol{padding-left:1.35em}
code,kbd,pre{font-family:var(--font-mono)}
code{overflow-wrap:anywhere}
pre{
  max-width:100%;
  overflow-x:auto;
  padding:18px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-sm);
  background:var(--color-surface-alt);
  color:var(--color-text);
  -webkit-overflow-scrolling:touch;
}
table{border-collapse:collapse}
h1,h2,h3,h4{
  margin:0 0 .55em;
  color:var(--color-text);
  font-family:var(--font-display);
  text-wrap:balance;
}
h1{font-size:clamp(52px,5vw,64px);line-height:1.1;letter-spacing:-.02em;font-weight:800}
h2{font-size:clamp(34px,3.6vw,50px);line-height:1.16;letter-spacing:-.018em;font-weight:800}
h3{font-size:clamp(22px,2.2vw,30px);line-height:1.28;font-weight:750}
::selection{background:var(--color-accent-soft);color:var(--color-accent-dark)}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{
  outline:var(--focus-ring);
  outline-offset:3px;
}
.sr-only,.sr{
  position:absolute;
  width:1px;
  height:1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
}
.no-break{white-space:nowrap}
.wrap{width:100%;max-width:var(--content-width);margin-inline:auto;padding-inline:var(--gutter)}
.reading{width:100%;max-width:var(--reading-width);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--section-space);padding-bottom:var(--section-space)}
.section-sm{padding-top:clamp(44px,6vw,76px);padding-bottom:clamp(44px,6vw,76px)}
.prose{min-width:0}
.prose h2{margin-top:1.75em}
.prose h3{margin-top:1.5em}
.prose a:not(.btn){color:var(--color-accent-dark);text-decoration:underline;text-underline-offset:3px}
.prose img{border-radius:var(--radius-md)}
.muted{color:var(--color-muted)}
.mono{font-family:var(--font-mono)}
.gradient-text{
  display:inline-block;
  background:linear-gradient(92deg,var(--color-accent),var(--color-accent-end));
  background-clip:text;
  -webkit-background-clip:text;
  color:transparent;
}
.eyebrow,.badge{
  display:inline-flex;
  min-height:28px;
  max-width:100%;
  align-items:center;
  gap:8px;
  padding:4px 11px;
  overflow:hidden;
  border:1px solid var(--color-accent-line);
  border-radius:var(--radius-pill);
  background:var(--color-surface);
  color:var(--color-accent-dark);
  font-size:12px;
  font-weight:700;
  line-height:1.35;
  box-shadow:var(--shadow-card);
}
.eyebrow-dot{
  width:8px;
  height:8px;
  flex:none;
  border-radius:50%;
  background:linear-gradient(135deg,var(--color-accent),var(--color-accent-end));
  box-shadow:0 0 0 3px var(--color-accent-soft);
}
.btn{
  display:inline-flex;
  min-width:24px;
  min-height:48px;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 24px;
  border:1px solid transparent;
  border-radius:var(--radius-md);
  font-weight:750;
  line-height:1.2;
  text-align:center;
  transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease,color .15s ease,background-color .15s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{
  background:linear-gradient(135deg,var(--color-accent),var(--color-accent-end));
  color:var(--color-white);
  box-shadow:var(--shadow-button);
}
.btn-secondary{
  border-color:var(--color-border);
  background:var(--color-surface);
  color:var(--color-text);
  box-shadow:var(--shadow-card);
}
.btn-secondary:hover{border-color:var(--color-accent-line);color:var(--color-accent-dark)}
.btn-dark{background:var(--color-text);color:var(--color-surface)}
.btn-small{min-height:40px;padding:8px 16px;font-size:14px}
.btn[aria-disabled="true"],.btn:disabled{cursor:not-allowed;opacity:.58;transform:none}
.button-row{display:flex;flex-wrap:wrap;gap:12px}
.card,.panel-card{
  min-width:0;
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  background:var(--color-surface);
  box-shadow:var(--shadow-card);
}
.panel-card{padding:clamp(20px,3vw,32px)}
.tilt{transform:rotate(-.45deg)}
.reveal{transition:opacity .55s ease,transform .55s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
.site-header{
  position:relative;
  z-index:50;
  height:var(--header-height);
}
.site-header__inner{
  display:flex;
  height:var(--header-height);
  align-items:center;
  gap:24px;
}
.site-brand{display:inline-flex;min-height:44px;align-items:center;gap:10px;flex:none}
.site-brand img{width:30px;height:30px}
.site-brand__name{font:800 21px/1 var(--font-display);letter-spacing:-.02em}
.site-brand__local{color:var(--color-muted);font-size:14px;font-weight:550}
.desktop-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:4px;margin:0;padding:0;list-style:none}
.nav-list>li{position:relative}
.nav-link,.more-trigger{
  display:inline-flex;
  min-height:40px;
  align-items:center;
  justify-content:center;
  gap:6px;
  padding:8px 13px;
  border:0;
  border-radius:var(--radius-sm);
  background:transparent;
  color:var(--color-text);
  font-size:15px;
  font-weight:550;
}
.nav-link:hover,.more-trigger:hover,.nav-more:focus-within .more-trigger{background:var(--color-surface-alt)}
.nav-link.is-active,.more-trigger.is-active{color:var(--color-accent-dark);font-weight:750}
.nav-caret{width:12px;height:12px;flex:none}
.nav-dropdown{
  position:absolute;
  top:calc(100% + 8px);
  left:0;
  min-width:184px;
  margin:0;
  padding:6px;
  visibility:hidden;
  opacity:0;
  transform:translateY(-4px);
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  background:var(--color-surface);
  box-shadow:var(--shadow-float);
  list-style:none;
  transition:opacity .15s ease,transform .15s ease,visibility .15s;
}
.nav-more:hover .nav-dropdown,.nav-more:focus-within .nav-dropdown{
  visibility:visible;
  opacity:1;
  transform:none;
}
.nav-dropdown .nav-link{width:100%;justify-content:flex-start}
.header-tools{display:flex;align-items:center;gap:8px}
.lang-switch{position:relative}
.lang-button{
  display:inline-flex;
  min-height:40px;
  align-items:center;
  justify-content:center;
  gap:6px;
  padding:7px 11px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-sm);
  background:var(--color-surface);
  color:var(--color-muted);
}
.lang-menu{
  position:absolute;
  top:calc(100% + 8px);
  right:0;
  min-width:150px;
  margin:0;
  padding:6px;
  visibility:hidden;
  opacity:0;
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  background:var(--color-surface);
  box-shadow:var(--shadow-float);
  list-style:none;
}
.lang-switch.is-open .lang-menu{visibility:visible;opacity:1}
.lang-menu a{display:flex;min-height:40px;align-items:center;padding:8px 11px;border-radius:var(--radius-sm)}
.lang-menu a:hover,.lang-menu a[aria-current="true"]{background:var(--color-surface-alt);color:var(--color-accent-dark)}
.login-link{
  display:inline-flex;
  min-height:40px;
  align-items:center;
  justify-content:center;
  padding:8px 17px;
  border-radius:var(--radius-sm);
  background:var(--color-text);
  color:var(--color-surface);
  font-size:14px;
  font-weight:700;
}
.menu-toggle{
  display:none;
  width:44px;
  min-width:44px;
  height:44px;
  padding:10px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-sm);
  background:var(--color-surface);
}
.menu-toggle span{display:block;width:20px;height:2px;margin:4px auto;background:var(--color-text);transition:transform .15s ease,opacity .15s ease}
.mobile-drawer{
  display:none;
  position:absolute;
  top:var(--header-height);
  right:var(--gutter);
  left:var(--gutter);
  z-index:52;
  max-height:calc(100dvh - var(--header-height) - 12px);
  overflow-y:auto;
  overscroll-behavior:contain;
  padding:10px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  background:var(--color-surface);
  box-shadow:var(--shadow-frame);
}
.mobile-drawer.is-open{display:block}
.mobile-drawer ul{margin:0;padding:0;list-style:none}
.mobile-drawer a{
  display:flex;
  width:100%;
  min-height:44px;
  align-items:center;
  padding:10px 12px;
  border-radius:var(--radius-sm);
}
.mobile-drawer a:hover,.mobile-drawer a.is-active{background:var(--color-surface-alt);color:var(--color-accent-dark)}
.mobile-drawer__label{padding:12px 12px 5px;color:var(--color-muted);font:600 10px/1 var(--font-mono);letter-spacing:.08em}
.nav-veil{
  display:none;
  position:fixed;
  inset:var(--header-height) 0 0;
  z-index:48;
  background:var(--color-shadow-mid);
}
.nav-veil.is-open{display:block}
.site-footer{
  position:relative;
  overflow-x:clip;
  border-top:1px solid var(--color-border);
  background:var(--color-surface-alt);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.35fr 1fr 1fr 1fr;
  gap:clamp(28px,5vw,72px);
  padding-top:64px;
  padding-bottom:48px;
}
.footer-brand p{max-width:360px;color:var(--color-muted)}
.footer-brand .site-brand{margin-bottom:16px}
.footer-title{margin:0 0 14px;font-size:13px;font-weight:800}
.footer-links{margin:0;padding:0;list-style:none}
.footer-links li+li{margin-top:8px}
.footer-links a{display:inline-flex;min-height:28px;align-items:center;color:var(--color-muted);font-size:14px}
.footer-links a:hover{color:var(--color-accent-dark)}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding-top:20px;
  padding-bottom:24px;
  border-top:1px solid var(--color-border);
  color:var(--color-muted);
  font-size:13px;
}
.footer-legal{display:flex;flex-wrap:wrap;gap:8px 18px}
.decor-clip{position:relative;max-width:100%;overflow-x:clip}
#server-status{
  position:relative;
  display:block;
  width:100%;
  max-width:100%;
  margin:0 0 32px;
  overflow:hidden;
}
#server-status+*{margin-top:0}
body:has(.toc-tabs) section[id]{scroll-margin-top:132px}
@media (max-width:1080px){
  .desktop-nav{display:none}
  .header-tools{margin-left:auto}
  .menu-toggle{display:block}
  .footer-grid{grid-template-columns:1.3fr 1fr 1fr}
}
@media (max-width:768px){
  h1{font-size:clamp(32px,9vw,40px)}
  h2{font-size:clamp(28px,7vw,36px)}
  .lang-button{display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .no-break{white-space:normal}
  .tilt,[class*="tilt"]{transform:none}
  .section{padding-top:68px;padding-bottom:68px}
  .button-row{flex-direction:column}
  .button-row .btn{width:100%}
  .site-brand__local{display:none}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{align-items:flex-start;flex-direction:column}
  .decor-clip{max-width:100%;overflow-x:clip}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{scroll-behavior:auto!important;animation:none!important;transition:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}