:root {
  --c-bg:#F8F2E3;
  --c-bg-top:#FCF8EE;
  --c-bg-bottom:#F1E9D7;
  --c-panel:#FFFCF5;
  --c-panel-2:#F0E8D6;
  --c-panel-2-lite:#F6F0E2;
  --c-border:#E2D8C3;
  --c-border-strong:#D3C6AB;
  --c-accent:#6CBD00;
  --c-accent-dark:#3C6E00;
  --c-olive-mid:#5A8F1E;
  --c-olive-light:#A9CF73;
  --c-text:#2A2117;
  --c-muted:#6E6252;
  --c-success:#1F8A6E;
  --c-warn:#C98A0B;
  --c-error:#C2412D;
  --c-ink:#241C14;
  --c-ink-deep:#18120C;
  --c-window:#2A2117;
  --c-window-bar:#342A1E;
  --c-on-dark:#F1E8D4;
  --c-on-dark-muted:#A89A80;
  --c-cream:#FBF4E4;
  --c-white:#FFFFFF;
  --flag-red:#C63B2E;
  --flag-blue:#2B4A82;
  --flag-white:#FFFDF8;
  --m-solid:#000000;
  --a-grid:rgba(42,33,23,.04);
  --a-glow:rgba(255,252,245,.92);
  --a-lime-shadow:rgba(108,189,0,.10);
  --a-lime-shadow-strong:rgba(108,189,0,.24);
  --a-ink-shadow:rgba(36,28,20,.30);
  --a-ink-shadow-soft:rgba(36,28,20,.08);
  --a-highlight:rgba(255,255,255,.82);
  --a-btn-hl:rgba(255,255,255,.38);
  --a-olive-edge:rgba(60,110,0,.38);
  --a-olive-tint:rgba(60,110,0,.10);
  --a-olive-glow:rgba(169,207,115,.18);
  --a-window-hl:rgba(255,252,245,.13);
  --a-window-row:rgba(255,252,245,.045);
  --a-window-line:rgba(255,252,245,.08);
  --a-panel-veil:rgba(255,252,245,.66);
  --a-flag-ring:rgba(42,33,23,.14);
  --a-cream-line:rgba(251,244,228,.55);
  --a-veil:rgba(36,28,20,.48);
  --font-display:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Microsoft YaHei","Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Microsoft YaHei","Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --text-xs:12px;
  --text-sm:14px;
  --text-base:16px;
  --text-lead:20px;
  --text-h3:22px;
  --text-h2:clamp(26px,3vw,40px);
  --text-h1:clamp(52px,4.7vw,68px);
  --weight-regular:400;
  --weight-medium:500;
  --weight-semibold:650;
  --weight-bold:700;
  --weight-heavy:800;
  --weight-display:900;
  --r-card:10px;
  --r-btn:8px;
  --r-pill:999px;
  --r-round:50%;
  --r-win:9px;
  --r-flag:3px;
  --r-row:5px;
  --r-large:16px;
  --wrap:1280px;
  --reading:800px;
  --gutter:40px;
  --head-height:64px;
  --anchor-gap:88px;
  --toc-gap:92px;
  --section-space:72px;
  --panel-shadow:0 20px 40px var(--a-lime-shadow),0 1px 2px var(--a-ink-shadow-soft),inset 0 1px 0 var(--a-highlight);
  --ease-quick:180ms ease;
  --ease-reveal:350ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:var(--anchor-gap)}
body{margin:0;background:var(--c-bg);color:var(--c-text);font-family:var(--font-body);font-size:var(--text-base);line-height:1.6;-webkit-font-smoothing:antialiased}
html.nav-open{overflow:hidden}
[hidden]{display:none!important}
img{display:block;max-width:100%;height:auto}
svg{flex-shrink:0}
button,input,select,textarea{font:inherit;color:inherit}
button,summary{cursor:pointer}
button{border:0}
a{color:var(--c-accent-dark);text-underline-offset:3px}
a,button,summary,input,select,textarea{touch-action:manipulation}
:where(a,button,summary,input,select,textarea,[tabindex]):focus-visible{outline:2px solid var(--c-accent-dark);outline-offset:4px}
:where(h1,h2,h3){font-family:var(--font-display);color:var(--c-text);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:var(--text-h1);font-weight:var(--weight-display);line-height:1.1;letter-spacing:-.02em}
h2{font-size:var(--text-h2);font-weight:var(--weight-heavy);line-height:1.2;letter-spacing:-.02em}
h3{font-size:var(--text-h3);font-weight:var(--weight-bold);line-height:1.35}
p{margin:0 0 1em}
ul,ol{padding-left:1.5em}
pre{max-width:100%;overflow-x:auto;padding:20px;border:1px solid var(--c-border);border-radius:var(--r-card);background:var(--c-panel-2);font-family:var(--font-mono)}
code{font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere}
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(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.reading-wrap{width:100%;max-width:var(--reading);margin-inline:auto;padding-inline:var(--gutter)}
.sec{padding-top:var(--section-space);padding-bottom:var(--section-space)}
.grid-three{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid-five{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}
:where(.grid-three,.grid-five,.deck,.feature-layout,.footer-grid)>*{min-width:0}
.panel{padding:24px;background:var(--c-panel);border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--panel-shadow)}
.muted{color:var(--c-muted)}
.mono{font-family:var(--font-mono)}
.no-break{white-space:nowrap}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.section-heading{margin:0 0 24px}
.section-intro{max-width:760px;color:var(--c-muted);margin-bottom:32px}
.prose{overflow-wrap:break-word;min-width:0}
.prose h2{margin-top:1.8em}
.prose h3{margin-top:1.5em}
.prose p,.prose li{line-height:1.85}
.prose li+li{margin-top:8px}
.prose img{border-radius:var(--r-card)}
.prose blockquote{margin-inline:0}
.decorated-section{position:relative;overflow-x:clip;max-width:100%;isolation:isolate}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:10px 24px;border-radius:var(--r-btn);font-size:var(--text-base);font-weight:var(--weight-bold);font-family:var(--font-body);line-height:1.5;text-decoration:none;transition:transform var(--ease-quick),box-shadow var(--ease-quick);white-space:nowrap;flex-shrink:0}
.btn svg{display:block;width:18px;height:18px}
.btn-primary{background:var(--c-accent);color:var(--c-text);border:1px solid var(--a-olive-edge);box-shadow:0 10px 24px var(--a-lime-shadow-strong),inset 0 1px 0 var(--a-btn-hl)}
.btn-ghost,.btn-secondary{background:var(--c-panel);color:var(--c-text);border:1px solid var(--c-border-strong);box-shadow:inset 0 1px 0 var(--a-highlight),0 4px 12px var(--a-ink-shadow-soft)}
.btn-primary:hover,.btn-ghost:hover,.btn-secondary:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--c-panel-2);color:var(--c-muted);box-shadow:none;border:1px solid var(--c-border);cursor:not-allowed;transform:none}
.notice{background:var(--c-accent-dark);color:var(--c-cream);font-size:13.5px;line-height:1.4;text-align:center;padding:10px 16px;letter-spacing:.01em}
.notice a{margin-left:14px;color:inherit;font-weight:var(--weight-bold);text-decoration-color:var(--a-cream-line)}
.notice a:hover{text-decoration-color:var(--c-cream)}
#site-header{position:relative;z-index:100}
.masthead{position:relative;z-index:103;background:var(--c-panel);border-bottom:1px solid var(--c-border)}
.masthead-inner{position:relative;max-width:var(--wrap);margin:0 auto;padding-inline:var(--gutter);height:var(--head-height);display:flex;align-items:center;gap:44px;flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0;color:var(--c-text)}
.brand-mark{width:32px;height:32px;border-radius:var(--r-round);display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}
.brand-mark img{width:100%;height:100%}
.brand-word{font-family:var(--font-display);font-weight:var(--weight-heavy);font-size:19px;letter-spacing:-.03em;color:var(--c-text)}
.mainnav{flex:1;min-width:0}
.mainnav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:30px}
.mainnav li{flex-shrink:0}
.mainnav a{display:inline-flex;align-items:center;min-height:32px;font-size:15px;font-weight:var(--weight-medium);text-decoration:none;color:var(--c-text);white-space:nowrap;padding:6px 0}
.mainnav a:hover{color:var(--c-accent-dark)}
.mainnav a[aria-current="page"]{font-weight:var(--weight-heavy)}
.masthead-tools{margin-left:auto;display:flex;align-items:center;gap:14px;flex-shrink:0}
.lang-switch{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;min-width:44px;width:auto;font:inherit;font-size:var(--text-sm);color:var(--c-muted);background:transparent;border:0;padding:8px 6px;cursor:pointer;white-space:nowrap;text-decoration:none;list-style:none}
.lang svg{display:block;width:16px;height:16px}
.lang-text{white-space:nowrap}
.lang:hover{color:var(--c-text)}
.lang-panel{position:absolute;top:calc(100% + 8px);right:0;z-index:110;min-width:180px;padding:8px;background:var(--c-panel);border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--panel-shadow)}
.lang-panel a{display:flex;align-items:center;width:100%;min-height:44px;padding:8px 12px;color:var(--c-text);text-decoration:none;border-radius:var(--r-row)}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--c-panel-2);color:var(--c-accent-dark)}
.login{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:8px 18px;border-radius:var(--r-btn);background:var(--c-ink);color:var(--c-cream);font-size:var(--text-sm);font-weight:var(--weight-semibold);text-decoration:none;white-space:nowrap;box-shadow:inset 0 1px 0 var(--a-window-hl),0 6px 14px var(--a-ink-shadow-soft)}
.login:hover{background:var(--c-window)}
.menu-button{display:none;align-items:center;justify-content:center;flex-direction:column;gap:4px;min-width:44px;min-height:44px;background:transparent;color:var(--c-text);border:1px solid var(--c-border);border-radius:var(--r-btn)}
.menu-line{display:block;width:20px;height:2px;background:currentColor}
.mobile-drawer{display:none;position:fixed;inset-inline:0;top:var(--drawer-top,var(--head-height));height:calc(100dvh - var(--drawer-top,var(--head-height)));max-height:calc(100dvh - var(--drawer-top,var(--head-height)));overflow-y:auto;overscroll-behavior:contain;z-index:102;padding:16px var(--gutter) 32px;background:var(--c-panel)}
.mobile-drawer a{display:flex;align-items:center;width:100%;min-height:48px;padding:12px 16px;text-decoration:none;color:var(--c-text);border-bottom:1px solid var(--c-border)}
.mobile-drawer a[aria-current="page"],.mobile-drawer a[aria-current="true"]{color:var(--c-accent-dark);font-weight:var(--weight-bold);background:var(--c-panel-2)}
.drawer-languages{margin-top:20px;border-top:1px solid var(--c-border-strong)}
.nav-veil{position:fixed;inset-inline:0;top:var(--drawer-top,var(--head-height));bottom:0;background:var(--a-veil);z-index:101;border:0;width:100%}
.site-footer{background:var(--c-panel-2);border-top:1px solid var(--c-border);padding-top:48px;padding-bottom:32px}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:40px}
.footer-brand p{max-width:340px;margin-top:16px;color:var(--c-muted);font-size:var(--text-sm)}
.footer-title{font-size:var(--text-base);font-weight:var(--weight-bold);margin:0 0 12px}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));list-style:none;padding:0;margin:0;gap:4px 16px}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:32px;font-size:var(--text-sm);color:var(--c-text);text-decoration:none}
.footer-links a:hover,.footer-languages a:hover,.footer-legal a:hover{text-decoration:underline;color:var(--c-accent-dark)}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 24px;margin-top:32px;padding-top:20px;border-top:1px solid var(--c-border-strong)}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:20px;color:var(--c-muted);font-size:var(--text-sm)}
.footer-bottom p{margin:0}
.footer-legal{display:flex;flex-wrap:wrap;gap:20px}
.reveal{transition:opacity var(--ease-reveal),transform var(--ease-reveal)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:relative;display:block;min-height:160px;max-width:100%;overflow:hidden;margin-top:24px;margin-bottom:32px}
#server-status+*{margin-top:32px}
#server-status :where(.grid,.server-grid){display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:16px}
#server-status :where(.grid,.server-grid)>*{min-width:0}
@media(max-width:1180px){
  .masthead-inner{gap:28px}
  .mainnav ul{gap:20px}
  .mainnav a{font-size:var(--text-sm)}
}
@media(max-width:1080px){
  .mainnav{display:none}
  .masthead-inner{gap:16px}
  .masthead-tools{margin-left:auto}
  .menu-button{display:inline-flex}
  .mobile-drawer:not([hidden]){display:block}
}
@media(max-width:768px){
  :root{--text-h1:38px;--section-space:48px}
  .grid-three{grid-template-columns:1fr}
  .grid-five{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr;gap:24px}
}
@media(max-width:640px){
  :root{--gutter:16px;--head-height:58px;--text-h1:36px}
  .no-break{white-space:normal}
  .notice{font-size:12.5px}
  .notice a{margin-left:8px}
  .masthead-inner{gap:8px}
  .masthead-tools{gap:6px;margin-left:auto}
  .brand{gap:7px}
  .brand-word{font-size:17px}
  .brand-mark{width:28px;height:28px}
  .lang-text{display:none}
  .login{padding:8px 12px}
  .tilt,[data-tilt]{transform:none}
  .decorated-section{max-width:100%;overflow-x:clip}
  .footer-bottom{flex-direction:column}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none;transition:none}
  .btn{transition:none}
  .btn-primary:hover,.btn-ghost:hover,.btn-secondary:hover{transform:none}
}