:root{
  color-scheme:light;
  --bg:#EDEBFA;--hero-top:#F4F2FD;--hero-bottom:#E4E1F6;--panel:#FAF9FF;--panel-2:#DFDBF3;--border:#D3CDEC;
  --accent:#9A2BFF;--accent-dark:#7411D4;--text:#17142E;--muted:#5B5778;--muted-2:#8C87AA;--success:#1FA971;--warn:#E8920C;--error:#E0384F;--white:#FFFFFF;
  --cyan:#2BB8D9;--cyan-deep:#1688A8;--mint:#1FA971;--mint-deep:#12835A;--amber:#E8920C;--amber-deep:#B5680A;--lilac-up1:#A397DB;--lilac-up2:#6D61B3;
  --cyan-t1:#DDF3F9;--cyan-t2:#B3E4F1;--cyan-t3:#8CD5E8;--mint-t1:#D8F1E5;--mint-t2:#ACE0C7;--mint-t3:#84CFAB;--lilac-t1:#EAE7F8;--lilac-t2:#D3CDEC;--lilac-t3:#BDB5E1;
  --side:#17142E;--side-2:#2A2448;--side-icon:#A29DC9;--deep-start:#2A1466;--deep-end:#4A1FA8;
  --flag-red:#D8243A;--flag-blue:#1F3E8F;--flag-green:#12904A;--flag-white:#FFFFFF;
  --accent-06:rgba(154,43,255,.06);--accent-10:rgba(154,43,255,.10);--accent-12:rgba(154,43,255,.12);--accent-26:rgba(154,43,255,.26);--cyan-06:rgba(43,184,217,.06);
  --ink-06:rgba(23,20,46,.06);--ink-14:rgba(23,20,46,.14);--white-0:rgba(255,255,255,0);--white-10:rgba(255,255,255,.10);--white-14:rgba(255,255,255,.14);--white-28:rgba(255,255,255,.28);--white-80:rgba(255,255,255,.80);--white-95:rgba(255,255,255,.95);
  --font-display:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --weight-normal:400;--weight-medium:500;--weight-bold:700;--weight-heavy:900;
  --r-xs:4px;--r-sm:6px;--r-md:8px;--r-lg:10px;--r-slab:12px;--r-round:50%;
  --shadow-soft:0 14px 34px -14px var(--accent-12),0 2px 6px var(--ink-06);
  --shadow-win:0 70px 120px -36px var(--accent-12),0 30px 60px -30px var(--ink-14),inset 0 1px 0 var(--white-95);
  --shadow-cta:inset 0 1px 0 var(--white-28),0 14px 28px -12px var(--accent-26);
  --gutter:32px;--content-width:1240px;--header-height:88px;--toc-offset:16px;--anchor-offset:96px;
  --text-xs:12px;--text-sm:14px;--text-base:15px;--text-lg:18px;--title-size:64px;--section-size:32px;
  --space-1:8px;--space-2:16px;--space-3:24px;--space-4:32px;--space-6:48px;--space-8:64px;
  --duration-fast:.18s;--duration-reveal:.35s;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:var(--anchor-offset)}
body{margin:0;background:var(--bg);color:var(--text);font:var(--weight-normal) var(--text-base)/1.6 var(--font-body);-webkit-font-smoothing:antialiased}
img,svg{vertical-align:middle;max-width:100%}
img{height:auto}
svg{flex-shrink:0}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
a{color:inherit;text-underline-offset:3px}
button,a,summary{touch-action:manipulation}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--accent-dark);outline-offset:3px}
[hidden]{display:none!important}
h1,h2,h3{font-family:var(--font-display);font-weight:var(--weight-heavy);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:clamp(52px,5vw,68px);line-height:1.1;letter-spacing:-.02em}
h2{font-size:var(--section-size);line-height:1.25;letter-spacing:-.015em;margin:0 0 var(--space-3)}
h3{font-size:22px;line-height:1.35;margin:0 0 var(--space-2)}
p{margin:0 0 var(--space-2)}
ul,ol{padding-left:1.5em}
code{font-family:var(--font-mono);overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;background:var(--panel-2);padding:var(--space-2);border-radius:var(--r-sm)}
pre code{overflow-wrap:normal;white-space:pre}
.wrap{width:100%;max-width:var(--content-width);margin-inline:auto;padding-inline:var(--gutter)}
.sec{padding-top:var(--space-8);padding-bottom:var(--space-8)}
.no-break{white-space:nowrap}
.muted{color:var(--muted)}
.mono{font-family:var(--font-mono)}
.panel,.card{min-width:0;border:1px solid var(--border);border-radius:var(--r-md);background:var(--panel);box-shadow:var(--shadow-soft),inset 0 1px 0 var(--white-95);padding:var(--space-3)}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-3)}
.grid>*{min-width:0}
.btn{min-height:44px;padding:0 24px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:var(--r-sm);font-size:15px;font-weight:var(--weight-bold);line-height:1.3;text-decoration:none;white-space:nowrap;flex-shrink:0;transition:background var(--duration-fast),box-shadow var(--duration-fast)}
.btn svg{width:16px;height:16px}
.btn-main,.btn-primary{background:linear-gradient(180deg,var(--accent),var(--accent-dark));color:var(--white);box-shadow:var(--shadow-cta)}
.btn-main:hover,.btn-primary:hover,.btn.is-hover{background:var(--accent-dark)}
.btn-ghost,.btn-secondary{background:var(--panel);color:var(--accent-dark);border-color:var(--accent)}
.btn-ghost:hover,.btn-secondary:hover{background:var(--accent-06)}
.btn:active{box-shadow:inset 0 2px 6px var(--ink-14)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--panel-2);color:var(--muted);border-color:var(--border);box-shadow:none;cursor:not-allowed}
.ctas{margin-top:16px;display:flex;flex-wrap:wrap;justify-content:center;gap:12px}
.notice{min-height:32px;display:flex;align-items:center;justify-content:center;gap:12px;padding:4px 16px;background:linear-gradient(90deg,var(--accent-dark),var(--accent) 40%,var(--cyan-deep));color:var(--white);font-size:13px;font-weight:600;letter-spacing:.01em;text-align:center}
.notice-sep{width:4px;height:4px;border-radius:var(--r-round);background:var(--white-80);flex:none}
#site-header{position:relative;z-index:70}
.topbar{height:56px;position:relative;z-index:73;background:var(--panel);border-bottom:1px solid var(--border)}
.topbar-in{max-width:var(--content-width);height:100%;margin:0 auto;padding-inline:var(--gutter);display:flex;align-items:center;flex-wrap:nowrap;gap:16px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-family:var(--font-display);font-weight:var(--weight-heavy);font-size:19px;letter-spacing:-.02em;flex-shrink:0;white-space:nowrap}
.brand img{width:30px;height:30px;flex:none}
.nav{margin-left:auto;flex:1;min-width:0}
.nav ul{display:flex;align-items:center;justify-content:flex-end;list-style:none;margin:0;padding:0}
.nav li{display:flex;align-items:center;min-width:0}
.nav li+li::before{content:"·";margin-inline:12px;color:var(--muted-2);font-weight:var(--weight-bold)}
.nav a{display:inline-flex;align-items:center;min-height:32px;font-size:14px;font-weight:var(--weight-medium);color:var(--muted);text-decoration:none;white-space:nowrap}
.nav a:hover,.nav a[aria-current="page"]{color:var(--text)}
.nav a[aria-current="page"]{font-weight:var(--weight-bold)}
.tools{display:flex;align-items:center;gap:10px;margin-left:12px;flex-shrink:0}
.language{position:relative}
.lang{height:34px;width:auto;min-width:44px;padding:0 12px;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--panel);color:var(--muted);font:var(--weight-medium) 13px/1 var(--font-body);white-space:nowrap}
.lang-panel{position:absolute;right:0;top:calc(100% + 8px);z-index:90;min-width:164px;padding:6px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--shadow-soft)}
.lang-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;text-decoration:none;border-radius:var(--r-xs)}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--panel-2)}
.login{min-height:34px;padding:0 18px;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--r-sm);background:var(--text);color:var(--white);font-size:13.5px;font-weight:var(--weight-bold);text-decoration:none;white-space:nowrap}
.login:hover{background:var(--side-2)}
.burger{display:none;min-width:44px;min-height:44px;align-items:center;justify-content:center;flex-direction:column;gap:4px;border:0;border-radius:var(--r-sm);background:var(--panel);color:var(--text)}
.burger-line{display:block;width:20px;height:2px;background:currentColor}
.drawer{position:fixed;inset-inline:0;top:var(--header-height);height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));z-index:72;overflow-y:auto;overscroll-behavior:contain;background:var(--panel);padding:16px var(--gutter) 32px;border-top:1px solid var(--border)}
.drawer .footer-links{display:block}
.drawer a,.drawer .footer-links a{display:flex;align-items:center;min-height:44px;width:100%;padding:12px 16px;text-decoration:none;border-bottom:1px solid var(--border)}
.drawer a[aria-current]{background:var(--panel-2);font-weight:var(--weight-bold)}
.drawer-label{margin:24px 16px 8px;color:var(--muted);font-size:var(--text-xs)}
.veil{position:fixed;inset:var(--header-height) 0 0;z-index:71;background:var(--ink-14);border:0}
html.nav-open{overflow:hidden}
.site-footer{border-top:1px solid var(--border);background:var(--panel);padding-top:var(--space-6);padding-bottom:var(--space-4)}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1.3fr;gap:var(--space-6)}
.footer-grid>*{min-width:0}
.footer-brand p{max-width:32em;margin-top:16px;color:var(--muted)}
.footer-title{font-weight:var(--weight-bold);margin-bottom:12px}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 16px;list-style:none;margin:0;padding:0}
.footer-links a{display:inline-flex;align-items:center;min-height:28px;color:var(--muted);text-decoration:none}
.footer-links a:hover{color:var(--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(--border);font-size:13px;color:var(--muted)}
.footer-languages{margin-top:24px}
.reveal{transition:opacity var(--duration-reveal) ease,transform var(--duration-reveal) ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
[data-count]{display:inline-block;font-variant-numeric:tabular-nums;min-width:3ch;text-align:start}
#server-status{position:static;display:block;min-width:0;max-width:100%;overflow:hidden;margin-block:24px}
#server-status+*{margin-top:24px}
.decoration-zone{position:relative;overflow-x:clip}
@media(min-width:961px){.drawer,.veil{display:none}}
@media(max-width:1100px){.nav li+li::before{margin-inline:7px}.topbar-in{gap:10px}.tools{margin-left:0}}
@media(max-width:960px){.nav{display:none}.tools{margin-left:auto}.burger{display:flex}}
@media(max-width:768px){h1{font-size:clamp(28px,5.1vw,40px)}.grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}}
@media(max-width:640px){
  :root{--gutter:16px;--section-size:27px;--space-8:40px}
  .no-break{white-space:normal}
  .tilt,.content-tilt{transform:none}
  .decoration-zone>*{max-width:100%}
  .topbar-in{gap:8px}.tools{gap:5px;margin-left:auto}.brand{font-size:16px;gap:6px}.brand img{width:26px;height:26px}
  .login{padding-inline:10px;font-size:13px}.lang{padding-inline:7px;font-size:12px}.notice{font-size:11px;gap:5px}
  .footer-grid{grid-template-columns:1fr;gap:24px}.footer-brand{grid-column:auto}.footer-bottom{align-items:flex-start}
  .btn{padding-inline:18px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending{opacity:1;transform:none;transition:none}
  *,*::before,*::after{animation-duration:0s!important;animation-iteration-count:1!important;transition-duration:0s!important}
}