:root {
  --bg:#F4ECDE;
  --bg-panel:#FFFBF4;
  --bg-panel2:#EDE3D2;
  --border:#DCCFBA;
  --accent:#3341C9;
  --accent-dark:#222C93;
  --text:#2A2118;
  --text-muted:#6E6152;
  --success:#2E7D4F;
  --warn:#B7791F;
  --error:#B3261E;
  --paper-top:#FAF4EA;
  --paper-bottom:#EFE5D4;
  --accent-tint:#E6E8F6;
  --mist:#8C86D6;
  --pink:#B44FD0;
  --white:#FFFFFF;
  --clear:transparent;
  --accent-a06:rgba(51,65,201,.06);
  --accent-a10:rgba(51,65,201,.10);
  --accent-a14:rgba(51,65,201,.14);
  --accent-a22:rgba(51,65,201,.22);
  --accent-dark-a40:rgba(34,44,147,.40);
  --accent-dark-a55:rgba(34,44,147,.55);
  --cobalt-glow:rgba(104,118,255,.62);
  --pink-a28:rgba(180,79,208,.28);
  --pink-a55:rgba(180,79,208,.55);
  --pink-a70:rgba(180,79,208,.70);
  --white-a75:rgba(255,255,255,.75);
  --grain:rgba(42,33,24,.03);
  --glass-top-a:rgba(255,255,255,.95);
  --glass-top-b:rgba(212,209,247,.80);
  --glass-left-a:rgba(152,160,242,.88);
  --glass-left-b:rgba(51,65,201,.90);
  --glass-front-a:rgba(146,116,224,.88);
  --glass-front-b:rgba(70,56,180,.94);
  --edge-hi:rgba(255,255,255,.82);
  --frost:rgba(255,251,244,.10);
  --frost-line:rgba(255,255,255,.32);
  --foot-glass:rgba(255,251,244,.84);
  --tag-glass:rgba(255,251,244,.94);
  --flag-red:#C8313E;
  --flag-navy:#1E2A6E;
  --flag-white:#FFFFFF;
  --shadow-panel:0 40px 80px -28px rgba(51,65,201,.10),0 16px 32px -16px rgba(51,65,201,.10);
  --shadow-float:0 18px 36px -14px rgba(51,65,201,.14),0 2px 6px rgba(42,33,24,.06);
  --shadow-tag:0 8px 18px -8px rgba(34,44,147,.30);
  --font-display:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","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;
  --font-xs:12px;
  --font-sm:14px;
  --font-nav:15px;
  --font-base:16px;
  --font-lede:20px;
  --font-h3:24px;
  --font-h2:clamp(28px,3vw,40px);
  --font-h1:clamp(52px,4.45vw,64px);
  --weight-normal:400;
  --weight-medium:500;
  --weight-strong:600;
  --radius:0;
  --round:50%;
  --gutter:40px;
  --content:1440px;
  --header-height:72px;
  --anchor-offset:88px;
  --toc-offset:144px;
  --s:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{background:var(--bg);scroll-padding-top:var(--anchor-offset);scroll-behavior:smooth}
body{margin:0;font-family:var(--font-body);font-size:var(--font-base);font-weight:var(--weight-normal);line-height:1.7;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body::after{content:"";position:fixed;inset:0;z-index:100;pointer-events:none;background-image:radial-gradient(var(--grain) .55px,var(--clear) .8px),radial-gradient(var(--grain) .55px,var(--clear) .8px);background-size:3px 3px,5px 5px;background-position:0 0,1px 2px}
[hidden]{display:none!important}
a{color:var(--accent);text-underline-offset:3px}
button,input,select,textarea{font:inherit;color:inherit;border-radius:var(--radius)}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
img{max-width:100%;height:auto;display:block}
svg{vertical-align:middle;flex-shrink:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
h1,h2,h3{font-family:var(--font-display);font-weight:var(--weight-normal);line-height:1.2;letter-spacing:-.02em;overflow-wrap:break-word;text-wrap:balance}
h1{font-size:var(--font-h1);color:var(--accent);margin:0 0 32px}
h2{font-size:var(--font-h2);margin:0 0 24px}
h3{font-size:var(--font-h3);margin:0 0 16px}
p{margin:0 0 24px}
strong{font-weight:var(--weight-strong)}
code{font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:24px;background:var(--bg-panel2);border:1px solid var(--border)}
pre code{overflow-wrap:normal;white-space:pre}
blockquote{margin:24px 0}
.wrap{width:100%;max-width:var(--content);margin-inline:auto;padding-inline:var(--gutter);min-width:0}
.section{padding-top:80px;padding-bottom:80px}
.section-head{margin-bottom:32px;max-width:840px}
.section-head p{color:var(--text-muted)}
.reading-wrap{max-width:960px}
.prose{min-width:0;overflow-wrap:break-word}
.prose h2,.prose h3{margin-top:48px}
.prose li{margin-bottom:8px}
.prose a{overflow-wrap:anywhere}
.prose section{min-width:0}
.grid{display:grid;gap:24px}
.grid>*{min-width:0}
.grid--three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--four{grid-template-columns:repeat(4,minmax(0,1fr))}
.panel,.card{background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-panel);min-width:0;padding:24px}
.panel--sunken{background:var(--bg-panel2)}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono)}
.no-break{white-space:nowrap}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.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}
.icon{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.fw{fill:var(--flag-white)}
.fr{fill:var(--flag-red)}
.fb{fill:var(--flag-navy)}
.sw{stroke:var(--flag-white);fill:none}
.sr{stroke:var(--flag-red);fill:none}
.cta-row{display:flex;flex-wrap:wrap;gap:16px;margin:0 0 32px}
.btn{display:inline-flex;align-items:center;justify-content:space-between;gap:40px;min-width:212px;min-height:56px;padding:12px 18px 12px 22px;font-size:var(--font-base);font-weight:var(--weight-normal);line-height:1.4;text-decoration:none;border:0;border-radius:var(--radius);transition:background-color .2s ease,color .2s ease}
.btn svg{width:20px;height:20px;flex:none;transition:transform .2s ease}
.btn:hover svg{transform:translateX(4px)}
.btn--solid,.btn-primary{background:var(--accent);color:var(--white)}
.btn--solid:hover,.btn-primary:hover{background:var(--accent-dark)}
.btn--line{background:var(--bg-panel);color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}
.btn--line:hover{background:var(--accent-tint)}
.btn--text{min-width:0;background:var(--clear);color:var(--accent);padding-inline:0}
.btn:active{box-shadow:inset 0 0 0 2px var(--accent-dark)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--bg-panel2);color:var(--text-muted);box-shadow:inset 0 0 0 1px var(--border);pointer-events:none}
.topbar{position:relative;z-index:50;background:var(--bg-panel);border-bottom:1px solid var(--border)}
.topbar__inner{max-width:var(--content);margin:0 auto;padding:0 var(--gutter);height:var(--header-height);display:flex;align-items:center;flex-wrap:nowrap}
.brandmark{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);flex-shrink:0}
.brandmark__logo{width:30px;height:30px;flex:none}
.brandmark__word{font-family:var(--font-display);font-size:var(--font-lede);font-weight:var(--weight-medium);letter-spacing:-.01em;white-space:nowrap}
.tabs{flex:1;min-width:0;margin-left:24px;padding-left:24px;position:relative}
.tabs::before{content:"";position:absolute;left:0;top:22px;width:1px;height:28px;background:var(--border)}
.tabs ul{display:flex;align-items:center;gap:0;list-style:none;margin:0;padding:0}
.tabs li{min-width:0}
.tabs__item{position:relative;display:flex;align-items:center;height:var(--header-height);padding:0 16px;font-size:var(--font-nav);color:var(--text);text-decoration:none;white-space:nowrap}
.tabs__item::after{content:"";position:absolute;left:16px;right:16px;bottom:-1px;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left center;transition:transform .22s ease}
.tabs__item:hover{color:var(--accent)}
.tabs__item:hover::after{transform:scaleX(.45)}
.tabs__item.is-current{color:var(--accent)}
.tabs__item.is-current::after{transform:scaleX(1)}
.topbar__tools{margin-left:auto;display:flex;align-items:center;gap:12px;flex-shrink:0}
.language{position:relative}
.langswitch{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-width:44px;width:auto;height:40px;padding:0 12px;font:inherit;font-size:var(--font-sm);color:var(--text);background:var(--clear);border:1px solid var(--clear);border-radius:var(--radius);cursor:pointer}
.langswitch span{white-space:nowrap}
.langswitch:hover{border-color:var(--border)}
.langswitch svg{width:18px;height:18px;flex:none}
.language__panel{position:absolute;right:0;top:calc(100% + 12px);z-index:80;min-width:192px;padding:8px;background:var(--bg-panel);border:1px solid var(--border);box-shadow:var(--shadow-float)}
.language__panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;text-decoration:none;color:var(--text)}
.language__panel a:hover,.language__panel a[aria-current="true"]{background:var(--accent-tint);color:var(--accent)}
.loginbtn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:40px;padding:0 20px;font-size:var(--font-nav);white-space:nowrap;color:var(--accent);text-decoration:none;background:var(--bg-panel);box-shadow:inset 0 0 0 1px var(--accent);border-radius:var(--radius);transition:background-color .2s ease,color .2s ease}
.loginbtn svg{width:18px;height:18px;flex:none}
.loginbtn:hover{background:var(--accent);color:var(--white)}
.menu-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:10px;border:1px solid var(--border);background:var(--bg-panel);color:var(--accent)}
.menu-toggle svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.5}
.mobile-drawer{display:none}
html.nav-open{overflow:hidden}
.footer{background:var(--bg-panel2);border-top:1px solid var(--border)}
.footer__grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:48px;padding-top:56px;padding-bottom:40px}
.footer__brand{min-width:0}
.footer__brand p{margin-top:24px;color:var(--text-muted);max-width:320px}
.footer__heading{font-size:var(--font-base);font-weight:var(--weight-medium);margin:0 0 16px}
.footer__links{list-style:none;padding:0;margin:0}
.footer__links a{display:inline-flex;align-items:center;min-height:32px;padding-block:4px;color:var(--text);text-decoration:none;overflow-wrap:anywhere}
.footer__links a:hover{color:var(--accent);text-decoration:underline}
.footer__bottom{display:flex;flex-wrap:wrap;align-items:center;gap:16px 32px;padding-top:24px;padding-bottom:24px;border-top:1px solid var(--border);font-size:var(--font-sm)}
.footer__bottom p{margin:0}
.footer__bottom a{display:inline-flex;align-items:center;min-height:24px;color:var(--text)}
.reveal{transition:opacity .35s ease,transform .35s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{display:grid;grid-template-columns:minmax(0,1fr);position:relative;min-width:0;max-width:100%;min-height:80px;overflow:hidden;margin-block:32px}
#server-status>*{min-width:0;max-width:100%}
#server-status+*{margin-top:32px}
[data-count]{display:inline-block;min-width:3ch;font-variant-numeric:tabular-nums;font-family:var(--font-mono);text-align:right}
body:has(.toc-tabs) section[id]{scroll-margin-top:var(--toc-offset)}
@media(min-width:1101px) and (max-width:1360px){
  .tabs{margin-left:16px;padding-left:16px}
  .tabs__item{padding-inline:10px}
  .tabs__item::after{left:10px;right:10px}
  .topbar__tools{gap:8px}
}
@media(max-width:1100px){
  .tabs{display:none}
  .topbar__tools{margin-left:auto}
  .menu-toggle{display:inline-flex}
  .mobile-drawer{position:fixed;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(--bg-panel);z-index:55;padding:16px var(--gutter) 32px;border-top:1px solid var(--border)}
  .mobile-drawer.is-open{display:block}
  .mobile-drawer ul{list-style:none;margin:0;padding:0}
  .mobile-drawer a{display:flex;width:100%;align-items:center;min-height:48px;padding:12px 16px;text-decoration:none;border-bottom:1px solid var(--border);color:var(--text)}
  .mobile-drawer a.is-current,.mobile-drawer a:hover{color:var(--accent);background:var(--accent-tint)}
  .mobile-drawer__languages{margin-top:24px;border-top:2px solid var(--accent)}
  .grid--four{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:768px){
  :root{--gutter:20px;--font-h1:36px;--font-h2:28px;--s:56px}
  .section{padding-top:48px;padding-bottom:48px}
  .grid--three{grid-template-columns:minmax(0,1fr)}
  .btn{min-width:0}
  .footer__grid{gap:32px}
}
@media(max-width:640px){
  :root{--header-height:64px;--anchor-offset:80px;--toc-offset:136px}
  .no-break{white-space:normal}
  .topbar__inner{flex-wrap:nowrap}
  .topbar__tools{gap:6px;margin-left:auto}
  .brandmark{gap:8px}
  .brandmark__word{font-size:var(--font-base)}
  .brandmark__logo{width:26px;height:26px}
  .langswitch{padding:0 8px}
  .langswitch span{display:none}
  .loginbtn{padding:0 12px;font-size:var(--font-sm)}
  .loginbtn svg{display:none}
  .grid--four,.footer__grid{grid-template-columns:minmax(0,1fr)}
  .tilt,[data-tilt]{transform:none}
  .decoration,.stripe-halo{max-width:100%}
  .footer__bottom{gap:12px 24px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none;transition:none}
  *,*::before,*::after{animation-duration:0s!important;animation-iteration-count:1!important;transition-duration:0s!important}
}