:root{
  --c-bg:#E6E8F7;
  --c-page-top:#EEF0FB;
  --c-page-bottom:#E1E4F5;
  --c-hero-top:#DCE0F4;
  --c-hero-bottom:#EEF0FB;
  --c-panel:#F7F8FE;
  --c-panel-2:#D9DDF1;
  --c-border:#CDD2EA;
  --c-accent:#7C2AE8;
  --c-accent-dark:#5A1FB8;
  --c-accent-2:#E5408E;
  --c-text:#141633;
  --c-muted:#5A5F80;
  --c-success:#1F9D6B;
  --c-warn:#C98A12;
  --c-error:#D2384B;
  --c-ink:#161A36;
  --c-ink-2:#1C2143;
  --c-ink-3:#252B53;
  --c-ink-text:#E7E9F8;
  --c-ink-muted:#9DA2C6;
  --c-ink-faint:#71769F;
  --c-lilac:#CDB6FF;
  --a-ink-line:rgba(231,233,248,.08);
  --a-ink-line-2:rgba(231,233,248,.15);
  --a-ink-hi:rgba(238,240,251,.12);
  --a-ink-top:rgba(238,240,251,.6);
  --a-ink-row:rgba(231,233,248,.035);
  --a-ink-foot:rgba(9,10,28,.22);
  --a-ink-shadow:rgba(9,10,28,.5);
  --a-lilac-bg:rgba(124,42,232,.26);
  --a-lilac-soft:rgba(124,42,232,.16);
  --a-lilac-ring:rgba(205,182,255,.38);
  --a-lilac-glow:rgba(124,42,232,.42);
  --a-lilac-glow-soft:rgba(124,42,232,.28);
  --a-iris-glow:rgba(124,42,232,.2);
  --a-iris-07:rgba(124,42,232,.07);
  --a-iris-10:rgba(124,42,232,.10);
  --a-iris-14:rgba(124,42,232,.14);
  --a-pink-08:rgba(229,64,142,.08);
  --a-white-35:rgba(255,255,255,.35);
  --a-white-55:rgba(255,255,255,.55);
  --a-white-70:rgba(255,255,255,.7);
  --a-text-10:rgba(20,22,51,.10);
  --a-muted-60:rgba(90,95,128,.6);
  --a-veil:rgba(20,22,51,.38);
  --flag-red:#D8303F;
  --flag-white:#FFFFFF;
  --flag-blue:#24398C;
  --a-flag-ring:rgba(20,22,51,.14);
  --c-clear:transparent;
  --r-xs:4px;
  --r-sm:6px;
  --r-md:8px;
  --r-lg:10px;
  --r-hero:28px;
  --r-pill:999px;
  --r-circle:50%;
  --f-display:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --f-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Malgun Gothic","Microsoft YaHei",system-ui,sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --f-mono-cjk:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,"Noto Sans SC","PingFang SC","Microsoft YaHei",monospace;
  --fs-body:16px;
  --fs-small:14px;
  --fs-caption:12px;
  --fs-h1:clamp(52px,4.72vw,68px);
  --fs-h2:40px;
  --fs-h3:22px;
  --fw-body:400;
  --fw-medium:500;
  --fw-semibold:600;
  --fw-bold:700;
  --fw-brand:800;
  --fw-display:900;
  --lh-body:1.6;
  --lh-heading:1.2;
  --sh-console:0 56px 96px -36px var(--a-iris-14),0 22px 44px -22px var(--a-iris-14);
  --sh-float:0 22px 44px -14px var(--a-iris-10),0 4px 10px -4px var(--a-iris-10);
  --gutter:32px;
  --content-width:1440px;
  --reading-width:880px;
  --header-height:68px;
  --anchor-offset:84px;
  --toc-offset:100px;
  --space-section:64px;
  --ease-out:cubic-bezier(.2,.7,.3,1);
  --time-fast:160ms;
  --time-reveal:360ms;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-offset);scroll-behavior:smooth}
html.nav-open{overflow:hidden}
body{
  margin:0;min-height:100vh;font-family:var(--f-body);font-size:var(--fs-body);
  font-weight:var(--fw-body);line-height:var(--lh-body);color:var(--c-text);
  background-color:var(--c-bg);
  background-image:linear-gradient(180deg,var(--c-page-top) 0,var(--c-page-bottom) 900px,var(--c-bg) 1400px);
  background-repeat:no-repeat;background-size:100% 1400px;
  overflow-x:clip;-webkit-font-smoothing:antialiased;
}
[hidden]{display:none!important}
a{color:inherit;text-underline-offset:4px}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
img,video{max-width:100%;height:auto}
svg{vertical-align:middle}
button,summary,a,input,select,textarea{-webkit-tap-highlight-color:var(--a-iris-10)}
:where(a,button,summary,input,select,textarea,[tabindex]):focus-visible{
  outline:2px solid var(--c-accent);outline-offset:3px;
}
::selection{background:var(--c-panel-2);color:var(--c-text)}
h1,h2,h3,h4{font-family:var(--f-display);line-height:var(--lh-heading);color:var(--c-text);text-wrap:balance}
h1{font-size:var(--fs-h1);font-weight:var(--fw-display);letter-spacing:-.02em;line-height:1.1}
h2{font-size:var(--fs-h2);font-weight:var(--fw-display);letter-spacing:-.02em}
h3{font-size:var(--fs-h3);font-weight:var(--fw-bold)}
p{margin:0 0 1em}
ul,ol{padding-inline-start:1.5em}
code,kbd,pre{font-family:var(--f-mono-cjk)}
code{overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:20px;border-radius:var(--r-md);background:var(--c-panel-2);color:var(--c-text);line-height:1.8}
pre code{overflow-wrap:normal;white-space:pre}
hr{border:0;border-top:1px solid var(--c-border);margin:32px 0}
.wrap{width:100%;max-width:var(--content-width);margin-inline:auto;padding-inline:var(--gutter)}
.reading-wrap{width:100%;max-width:var(--reading-width);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--space-section);padding-bottom:var(--space-section)}
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid>* , .panel>* , .card>*{min-width:0}
.no-break{white-space:nowrap}
.muted{color:var(--c-muted)}
.mono{font-family:var(--f-mono-cjk);font-variant-numeric:tabular-nums}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.card,.panel{min-width:0;background:var(--c-panel);border:1px solid var(--c-border);border-radius:var(--r-lg);box-shadow:var(--sh-float)}
.card{padding:24px}
.panel{padding:32px}
.inset-panel{min-width:0;padding:20px;background:var(--c-panel-2);border-radius:var(--r-md)}
.btn,.btn-solid,.btn-primary,.btn-secondary{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:50px;padding:11px 26px;border:1px solid var(--c-text);
  border-radius:var(--r-md);font-family:var(--f-body);font-size:var(--fs-body);
  font-weight:var(--fw-bold);letter-spacing:.01em;text-decoration:none;
  flex-shrink:0;white-space:nowrap;background:var(--c-text);color:var(--c-panel);
}
.btn-solid,.btn-primary{background:var(--c-text);color:var(--c-panel)}
.btn-secondary{background:var(--c-clear);color:var(--c-text)}
.btn:hover,.btn-solid:hover,.btn-primary:hover{background:var(--c-accent-dark);border-color:var(--c-accent-dark)}
.btn-secondary:hover{background:var(--c-panel-2);border-color:var(--c-text)}
.btn:active,.btn-solid:active,.btn-primary:active,.btn-secondary:active{transform:translateY(1px)}
.btn:disabled,.btn-primary:disabled,.btn-secondary:disabled{background:var(--c-panel-2);border-color:var(--c-border);color:var(--c-muted)}
.btn svg,.btn-solid svg,.btn-primary svg,.btn-secondary svg{width:16px;height:16px;display:block;flex-shrink:0}
.link-under{display:inline-block;min-height:24px;font-size:var(--fs-body);font-weight:var(--fw-semibold);color:var(--c-text);text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:7px;text-decoration-color:var(--c-muted)}
.link-under:hover{text-decoration-color:var(--c-text)}
.topbar{position:relative;z-index:50}
.topbar-in{display:flex;align-items:center;gap:40px;height:var(--header-height);flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0;min-height:32px}
.brand-logo{display:block;width:32px;height:32px;flex-shrink:0;border-radius:var(--r-circle)}
.brand-word{font-family:var(--f-display);font-weight:var(--fw-brand);font-size:19px;letter-spacing:-.02em;white-space:nowrap}
.mainnav{flex:1;min-width:0}
.mainnav ul{list-style:none;margin:0;padding:0;display:flex;align-items:center}
.mainnav li{display:flex;align-items:center;flex-shrink:0}
.mainnav li+li::before{content:"·";color:var(--a-muted-60);margin:0 11px;font-weight:var(--fw-bold)}
.mainnav a{display:inline-flex;align-items:center;min-height:32px;font-size:14.5px;font-weight:var(--fw-medium);color:var(--c-muted);text-decoration:none;padding:6px 1px;white-space:nowrap}
.mainnav a:hover{color:var(--c-text)}
.mainnav a[aria-current="page"]{color:var(--c-text);font-weight:var(--fw-bold);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:9px}
.topbar-end{margin-left:auto;display:flex;align-items:center;gap:12px;flex-shrink:0}
.language{position:relative}
.lang{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  font:inherit;font-size:var(--fs-small);color:var(--c-muted);
  background:var(--c-clear);border:0;padding:6px 8px;border-radius:var(--r-sm);
  min-height:36px;min-width:44px;width:auto;
}
.lang span{white-space:nowrap}
.lang:hover{color:var(--c-text)}
.lang svg{width:15px;height:15px;display:block;flex-shrink:0}
.lang-panel{
  position:absolute;right:0;top:calc(100% + 8px);z-index:80;
  width:180px;padding:6px;background:var(--c-panel);
  border:1px solid var(--c-border);border-radius:var(--r-md);box-shadow:var(--sh-float);
}
.lang-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;text-decoration:none;border-radius:var(--r-sm);font-size:var(--fs-small)}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--c-panel-2);color:var(--c-text)}
.login{
  display:inline-flex;align-items:center;justify-content:center;height:36px;padding:0 18px;
  border-radius:var(--r-md);border:1px solid var(--c-text);
  background:var(--a-white-55);color:var(--c-text);
  font-size:var(--fs-small);font-weight:var(--fw-semibold);text-decoration:none;white-space:nowrap;
}
.login:hover{background:var(--c-text);color:var(--c-panel)}
.menu-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:10px;border:1px solid var(--c-border);border-radius:var(--r-md);background:var(--c-panel);color:var(--c-text)}
.menu-toggle svg{display:block;width:20px;height:20px}
.menu-drawer{display:none}
.menu-veil{display:none}
.site-footer{margin-top:48px;padding-top:48px;padding-bottom:24px;border-top:1px solid var(--c-border);background:var(--c-panel-2)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-grid>*{min-width:0}
.footer-brand p{max-width:300px;margin-top:16px;color:var(--c-muted);font-size:var(--fs-small)}
.footer-heading{margin:0 0 12px;font-size:var(--fs-small);font-weight:var(--fw-bold)}
.footer-links{list-style:none;padding:0;margin:0;display:grid;gap:4px}
.footer-links a{display:inline-flex;align-items:center;min-height:30px;text-decoration:none;font-size:var(--fs-small);color:var(--c-muted)}
.footer-links a:hover{color:var(--c-text);text-decoration:underline}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;margin-top:32px;padding-top:20px;border-top:1px solid var(--c-border);font-size:var(--fs-caption);color:var(--c-muted)}
.footer-legal{display:flex;flex-wrap:wrap;gap:20px}
.footer-legal a{display:inline-flex;align-items:center;min-height:24px}
.prose{min-width:0;overflow-wrap:break-word}
.prose p,.prose li{line-height:1.9}
.prose h2{margin-top:48px;margin-bottom:20px;font-size:30px}
.prose h3{margin-top:32px;margin-bottom:14px}
.prose a:not(:where(.btn,.btn-solid,.btn-primary,.btn-secondary)){color:var(--c-accent-dark)}
.prose li+li{margin-top:8px}
.prose img{border-radius:var(--r-md)}
.reveal{transition:opacity var(--time-reveal) var(--ease-out),transform var(--time-reveal) var(--ease-out)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:relative;display:block;min-width:0;max-width:100%;min-height:160px;overflow:hidden;margin-top:24px;margin-bottom:24px}
#server-status+*{margin-top:24px}
@media(max-width:1320px){
  .topbar-in{gap:24px}
  .mainnav li+li::before{margin-inline:8px}
}
@media(max-width:1100px){
  .topbar-in{gap:16px}
  .mainnav a{font-size:var(--fs-caption)}
  .mainnav li+li::before{margin-inline:6px}
  .topbar-end{gap:8px}
}
@media(max-width:1024px){
  .mainnav{display:none}
  .topbar-end{margin-left:auto}
  .menu-toggle{display:inline-flex}
  .menu-drawer:not([hidden]){
    display:block;position:fixed;z-index:45;top:var(--header-height);left:0;right:0;
    height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));
    overflow-y:auto;overscroll-behavior:contain;background:var(--c-panel);
    border-top:1px solid var(--c-border);padding:16px var(--gutter) 32px;
  }
  .menu-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px 16px;text-decoration:none;border-radius:var(--r-sm);color:var(--c-text)}
  .menu-drawer a:hover,.menu-drawer a[aria-current="page"]{background:var(--c-panel-2)}
  .drawer-links{list-style:none;padding:0;margin:0}
  .drawer-languages{margin-top:16px;padding-top:16px;border-top:1px solid var(--c-border)}
  .drawer-languages a[aria-current="true"]{font-weight:var(--fw-bold);background:var(--c-panel-2)}
  .menu-veil:not([hidden]){display:block;position:fixed;inset:var(--header-height) 0 0;z-index:40;background:var(--a-veil);border:0}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:768px){
  :root{--gutter:16px;--fs-h1:40px;--fs-h2:30px;--space-section:40px}
  .grid-3{grid-template-columns:1fr}
  h1{font-size:var(--fs-h1)}
  .topbar-in{gap:8px}
  .panel{padding:24px}
}
@media(max-width:640px){
  .no-break{white-space:normal}
  .grid-2{grid-template-columns:1fr}
  .tilt,.tilt-card,[data-tilt]{transform:none}
  .hero,.section,.decoration-region{max-width:100%;overflow-x:clip}
  .footer-grid{gap:24px}
  .brand{gap:6px}
  .brand-word{font-size:16px}
  .brand-logo{width:28px;height:28px}
  .topbar-end{gap:4px;margin-left:auto}
  .lang{font-size:var(--fs-caption);padding-inline:5px}
  .lang svg{display:none}
  .login{padding-inline:10px;font-size:var(--fs-caption)}
  .menu-toggle{padding:10px}
  .card,.panel{padding:20px}
}
@media(max-width:359px){
  .brand-word{font-size:var(--fs-small)}
  .brand-logo{width:24px;height:24px}
  .lang{font-size:11px;padding-inline:3px}
  .login{padding-inline:8px}
  .footer-grid{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none;transition:none}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}