:root {
  --bg:#F8F0DE;
  --panel:#FFFBF3;
  --panel-2:#EFE5D1;
  --border:#E3D6BE;
  --rule:#EEE4D0;
  --line-strong:#CDBB9C;
  --accent:#E3A008;
  --accent-soft:#F2C24A;
  --accent-dark:#8F6200;
  --badge-bg:#FCEFC9;
  --text:#2B2117;
  --muted:#6E604F;
  --faint:#9A8B76;
  --success:#3F8F4E;
  --warn:#C9781A;
  --error:#C2412E;
  --on-dark:#FFFBF3;
  --hero-top:#FCF6E8;
  --hero-bottom:#F3E9D3;
  --glow-a:rgba(227,160,8,.09);
  --glow-b:rgba(227,160,8,.05);
  --hi:rgba(255,255,255,.92);
  --hi-dark:rgba(255,251,243,.16);
  --shadow-honey:rgba(227,160,8,.10);
  --shadow-honey-strong:rgba(227,160,8,.14);
  --shadow-ink:rgba(43,33,23,.07);
  --shadow-ink-strong:rgba(43,33,23,.16);
  --glass:rgba(255,251,243,.72);
  --head-bg:rgba(255,251,243,.82);
  --veil:rgba(43,33,23,.25);
  --tape-pink:#EFB9C0;
  --tape-mint:#B2D9C2;
  --tape-blue:#B3C9E2;
  --tape-lav:#CDBFE5;
  --tape-line:rgba(255,255,255,.38);
  --plate-pink:#FBE4E4;
  --plate-mint:#E0F0E6;
  --plate-blue:#E1EAF4;
  --plate-lav:#ECE5F5;
  --ink-pink:#B0505C;
  --ink-mint:#3E7E5B;
  --ink-blue:#4A6C96;
  --ink-lav:#7660A6;
  --flag-red:#C8372D;
  --flag-blue:#2D467F;
  --flag-nl:#2F5597;
  --flag-green:#2F8A52;
  --flag-white:#FFFDF8;
  --flag-edge:rgba(43,33,23,.16);
  --clear:transparent;
  --font-display:"Inter","Noto Sans SC","PingFang SC","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;
  --fs-xs:12px;
  --fs-sm:14px;
  --fs-md:16px;
  --fs-body:18px;
  --fs-lg:20px;
  --fs-h3:24px;
  --fs-h2:36px;
  --fs-display:66px;
  --fs-mobile-display:38px;
  --fs-brand:19px;
  --fs-micro:11px;
  --fs-chip:13px;
  --fs-note:15px;
  --fs-number:26px;
  --fw-normal:400;
  --fw-medium:500;
  --fw-semibold:600;
  --fw-bold:700;
  --fw-heavy:800;
  --fw-display:900;
  --lh-body:1.7;
  --lh-heading:1.2;
  --lh-display:1.06;
  --tracking-display:-.03em;
  --tracking-tight:-.02em;
  --r-xs:4px;
  --r-sm:6px;
  --r:8px;
  --r-lg:12px;
  --r-pill:999px;
  --r-round:50%;
  --gutter:24px;
  --wrap:1180px;
  --header-height:64px;
  --anchor-offset:84px;
  --toc-offset:144px;
  --space-section:80px;
  --duration-fast:.2s;
  --duration-reveal:.35s;
  --shadow-card:inset 0 1px 0 var(--hi),0 1px 2px var(--shadow-ink),0 18px 36px -14px var(--shadow-honey-strong);
  --shadow-button:inset 0 1px 0 var(--hi-dark),0 10px 22px -12px var(--shadow-ink-strong),0 16px 32px -14px var(--shadow-honey-strong);
  --paper-noise:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160' viewBox='0 0 160 160'%3E%3Cfilter id='paper'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.86' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Cpath filter='url(%23paper)' opacity='.7' d='M0 0h160v160H0z'/%3E%3C/svg%3E");
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-offset);scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--fs-body);line-height:var(--lh-body);-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0;z-index:90;pointer-events:none;background-image:var(--paper-noise);opacity:.03;mix-blend-mode:multiply}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button,a,input,select,summary{touch-action:manipulation}
button{border:0}
img,svg{max-width:100%;vertical-align:middle}
img{height:auto}
svg{flex-shrink:0}
p,ul,ol,dl,dd,dt{margin:0;padding:0}
ul{list-style:none}
h1,h2,h3,h4{margin:0;font-family:var(--font-display);line-height:var(--lh-heading);text-wrap:balance}
h1{font-size:clamp(52px,5vw,72px);font-weight:var(--fw-display);letter-spacing:var(--tracking-tight)}
h2{font-size:var(--fs-h2);font-weight:var(--fw-heavy);letter-spacing:var(--tracking-tight)}
h3{font-size:var(--fs-h3);font-weight:var(--fw-bold)}
h4{font-size:var(--fs-lg)}
strong{font-weight:var(--fw-bold)}
:focus-visible{outline:2px solid var(--accent-dark);outline-offset:3px;border-radius:var(--r-sm)}
[hidden]{display:none!important}
.no-break{white-space:nowrap}
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--space-section);padding-bottom:var(--space-section)}
.section-head{max-width:760px;margin-bottom:32px}
.section-head p{margin-top:16px;color:var(--muted)}
.stack>*+*{margin-top:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.grid-3>*,.grid-2>*,.wrap>*,.head-in>*{min-width:0}
.muted{color:var(--muted)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.card,.panel{background:var(--panel);border:1px solid var(--border);border-radius:var(--r);padding:28px;box-shadow:var(--shadow-card)}
.panel-inset{background:var(--panel-2);border:1px solid var(--border);border-radius:var(--r);padding:24px}
.prose{max-width:820px;overflow-wrap:break-word}
.prose p,.prose ul,.prose ol,.prose pre,.prose blockquote,.prose table{margin-block:20px}
.prose h2{margin-top:48px;margin-bottom:20px}
.prose h3{margin-top:32px;margin-bottom:16px}
.prose ul{list-style:disc;padding-left:24px}
.prose ol{padding-left:28px}
.prose li+li{margin-top:8px}
.prose a{text-decoration:underline;text-underline-offset:4px}
code{font-family:var(--font-mono);font-size:var(--fs-md);overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--panel-2);border:1px solid var(--border);border-radius:var(--r)}
pre code{white-space:pre;overflow-wrap:normal}
section[id],h2[id],h3[id]{scroll-margin-top:var(--anchor-offset)}
body:has(.toc-tabs) section[id]{scroll-margin-top:var(--toc-offset)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:12px 26px;border:1px solid var(--clear);border-radius:var(--r);font-size:var(--fs-md);font-weight:var(--fw-semibold);line-height:1.4;white-space:nowrap;flex-shrink:0;transition:transform var(--duration-fast) ease,box-shadow var(--duration-fast) ease,background-color var(--duration-fast) ease}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--text);color:var(--on-dark);box-shadow:var(--shadow-button)}
.btn-ghost,.btn-secondary{background:var(--glass);color:var(--text);border-color:var(--line-strong)}
.btn:hover,.btn.is-hover{transform:translateY(-1px);box-shadow:var(--shadow-card)}
.btn:active,.btn.is-active{transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;transform:none}
.btn-primary:hover svg{transform:translateX(2px)}
.btn svg{transition:transform var(--duration-fast) ease}
.btn-small{min-height:40px;padding:8px 16px;font-size:var(--fs-sm)}
.cta-row{margin-top:30px;display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
.site-head,#site-header{position:relative;z-index:60}
.site-head{background:var(--head-bg);border-bottom:1px solid var(--border)}
.head-in{max-width:1360px;margin:0 auto;height:var(--header-height);padding-inline:24px;display:flex;align-items:center;gap:20px;flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;min-height:32px}
.brand-mark{width:30px;height:30px;flex:none}
.brand-word{font-family:var(--font-display);font-size:var(--fs-brand);font-weight:var(--fw-heavy);letter-spacing:var(--tracking-tight);line-height:1}
.brand-zh{color:var(--muted);font-size:var(--fs-sm);font-weight:var(--fw-medium)}
.desktop-nav{flex:1;min-width:0;display:flex;justify-content:center}
.nav-pill{display:flex;align-items:center;list-style:none;margin:0;padding:4px;gap:2px;border-radius:var(--r-pill);background:var(--panel-2);border:1px solid var(--border)}
.nav-pill li{flex-shrink:0}
.nav-pill a{display:block;padding:6px 13px;border-radius:var(--r-pill);font-size:var(--fs-sm);line-height:20px;font-weight:var(--fw-medium);color:var(--muted);white-space:nowrap;transition:color var(--duration-fast),background-color var(--duration-fast)}
.nav-pill a:hover{color:var(--text)}
.nav-pill a.is-on{background:var(--panel);color:var(--text);font-weight:var(--fw-semibold);box-shadow:inset 0 0 0 1px var(--border),0 2px 6px -2px var(--shadow-honey-strong)}
.head-tools{margin-left:auto;display:flex;align-items:center;gap:8px;flex-shrink:0}
.language{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;width:auto;height:36px;padding:0 12px;border:0;border-radius:var(--r-pill);background:var(--clear);font-size:var(--fs-sm);color:var(--muted);cursor:pointer;white-space:nowrap}
.lang span{white-space:nowrap}
.lang:hover{background:var(--panel-2);color:var(--text)}
.lang svg{width:15px;height:15px}
.caret{font-size:var(--fs-micro);line-height:1}
.language-panel{position:absolute;right:0;top:calc(100% + 12px);z-index:80;min-width:180px;padding:8px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow-card)}
.language-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;font-size:var(--fs-sm);border-radius:var(--r-sm)}
.language-panel a:hover,.language-panel a[aria-current]{background:var(--panel-2)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;height:36px;padding:0 18px;border-radius:var(--r);background:var(--text);color:var(--on-dark);font-size:var(--fs-sm);font-weight:var(--fw-semibold);line-height:1;white-space:nowrap;box-shadow:inset 0 1px 0 var(--hi-dark),0 6px 14px -8px var(--shadow-ink-strong)}
.btn-login:hover{transform:translateY(-1px)}
.menu-toggle{display:none;min-width:44px;min-height:44px;padding:10px;background:var(--clear);border:1px solid var(--border);border-radius:var(--r)}
.menu-line{display:block;width:20px;height:2px;margin:4px auto;background:currentColor}
.mobile-drawer{position:fixed;top:var(--header-height);right:0;bottom:0;z-index:62;width:min(100%,440px);height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));padding:20px var(--gutter);overflow-y:auto;overscroll-behavior:contain;background:var(--panel);border-left:1px solid var(--border)}
.mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:10px 14px;border-radius:var(--r);font-size:var(--fs-md)}
.mobile-drawer a:hover,.mobile-drawer a.is-on{background:var(--panel-2)}
.drawer-languages{margin-top:20px;padding-top:16px;border-top:1px solid var(--border)}
.nav-veil{position:fixed;top:var(--header-height);bottom:0;left:0;right:0;z-index:61;border:0;background:var(--veil);cursor:pointer}
html.nav-open{overflow:hidden}
.site-footer{border-top:1px solid var(--border);background:var(--panel-2);padding-top:48px;padding-bottom:24px}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:40px}
.footer-brand p{max-width:340px;margin-top:20px;color:var(--muted);font-size:var(--fs-sm)}
.footer-title{font-size:var(--fs-md);font-weight:var(--fw-bold);margin-bottom:12px}
.footer-links{display:flex;flex-wrap:wrap;gap:4px 16px}
.footer-links a{display:inline-flex;align-items:center;min-height:32px;font-size:var(--fs-sm);color:var(--muted)}
.footer-links a:hover{text-decoration:underline;color:var(--text)}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 20px;padding-block:24px}
.footer-languages a{min-height:28px;font-size:var(--fs-sm)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;padding-top:20px;border-top:1px solid var(--border);font-size:var(--fs-sm);color:var(--muted)}
.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}
#server-status{position:relative;display:block;min-height:160px;max-width:100%;overflow:hidden;margin-block:32px}
#server-status>*{min-width:0;max-width:100%}
#server-status+*{margin-top:32px}
@media(min-width:1181px) and (max-width:1330px){
  .head-in{gap:12px;padding-inline:20px}
  .nav-pill a{padding-inline:9px}
  .lang{padding-inline:8px}
}
@media(max-width:1180px){
  .desktop-nav{display:none}
  .menu-toggle{display:block}
  .head-tools{margin-left:auto}
}
@media(max-width:768px){
  :root{--space-section:56px;--fs-h2:28px}
  h1{font-size:var(--fs-mobile-display)}
  .grid-3,.grid-2{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .no-break{white-space:normal}
  .tilt,[data-tilt]{transform:none}
  .head-in{padding-inline:16px;gap:8px}
  .head-tools{gap:4px;margin-left:auto}
  .brand{gap:6px}
  .brand-word{font-size:var(--fs-md)}
  .brand-mark{width:26px;height:26px}
  .btn-login{padding-inline:12px}
  .lang{padding-inline:4px;font-size:var(--fs-xs)}
  .lang svg{display:none}
  .card,.panel{padding:22px}
  .section-head{margin-bottom:24px}
}
@media(max-width:359px){
  .head-in{padding-inline:12px;gap:4px}
  .brand-word{font-size:var(--fs-sm)}
  .lang{font-size:var(--fs-micro)}
  .btn-login{padding-inline:10px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none;transition:none}
  *,*::before,*::after{animation:none!important;transition:none!important}
}