:root{
  --bg:#F6EFE3;--bg-top:#FBF6EC;--bg-bottom:#F0E6D5;--panel:#FFFBF4;--panel-2:#EFE5D4;--bar:#F6EEE1;
  --border:#E0D3BE;--border-soft:#EDE3D3;--border-strong:#CDBEA6;
  --ink:#221B33;--ink-deep:#120E1D;--text:#2A2119;--muted:#6E6153;--wisteria:#5B4FD0;--hl:#E4DDF5;--hl-edge:#D6CDEE;
  --success:#2F8A57;--warn:#B9741A;--error:#BE3F2C;--on-ink:#FFFBF4;--on-ink-muted:rgba(255,251,244,.66);
  --hairline-light:rgba(255,251,244,.18);--ink-edge:rgba(18,14,29,.55);--cam:#3A3150;
  --wave-apricot:#F3DDBF;--wave-apricot-2:#F6E7D0;--wave-lilac:#E7DDEC;
  --dot-1:#D3A193;--dot-2:#D8C08F;--dot-3:#A3BBA2;
  --metal-hi:#F7F2EA;--metal-1:#D6CCBD;--metal-2:#E9E2D6;--metal-3:#BDB1A0;
  --flag-red:#CC3A32;--flag-white:#FFFDF8;--flag-blue:#2E3A74;--flag-edge:rgba(34,27,51,.14);
  --shadow-1:rgba(34,27,51,.12);--shadow-2:rgba(34,27,51,.07);--shadow-3:rgba(34,27,51,.08);--shadow-cta:rgba(34,27,51,.32);
  --veil:rgba(34,27,51,.24);--mask:#000;--clear:transparent;
  --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","Malgun Gothic","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --r-ctl:8px;--r-card:12px;--r-win:20px;--r-pill:999px;--r-round:50%;--r-screen:11px;--r-phone:30px;--r-phone-screen:23px;--r-mini:5px;--r-small:6px;
  --gutter:48px;--content-max:1328px;--head-height:76px;--anchor-offset:96px;--toc-offset:92px;--section-space:88px;
  --ease:ease;--fast:.2s;--reveal-time:.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-family:var(--font-body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
img{display:block;max-width:100%;height:auto}
svg{flex-shrink:0}
[hidden]{display:none!important}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--wisteria);outline-offset:3px;border-radius:var(--r-ctl)}
:where(h1,h2,h3){font-family:var(--font-display);color:var(--ink);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:clamp(52px,4.6vw,68px);font-weight:900;line-height:1.12;letter-spacing:-.02em}
h2{font-size:clamp(28px,3vw,40px);font-weight:900;line-height:1.25;letter-spacing:-.02em}
h3{font-size:22px;line-height:1.4;font-weight:800}
p{overflow-wrap:break-word}
code{font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--panel-2);border-radius:var(--r-ctl)}
pre code{overflow-wrap:normal;white-space:pre}
table{border-collapse:collapse}
th,td{word-break:keep-all}
button svg,a svg{flex-shrink:0}
.wrap{width:100%;max-width:var(--content-max);margin-inline:auto;padding-inline:var(--gutter)}
.reading-wrap{max-width:880px;margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--section-space);padding-bottom:var(--section-space)}
.grid{display:grid;gap:24px}
.grid>*,:where(.hero-grid,.footer-grid)>*{min-width:0}
.stack{display:grid;gap:24px}
.no-break{white-space:nowrap}
.muted{color:var(--muted)}
.mono{font-family:var(--font-mono)}
.text-link{color:var(--wisteria);font-weight:600}
.text-link:hover{text-decoration:underline;text-underline-offset:3px}
.panel,.card{padding:28px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:0 24px 56px -32px var(--shadow-1),inset 0 1px 0 var(--panel)}
.panel-inset{padding:24px;background:var(--panel-2);border-radius:var(--r-card)}
.hl-key{background:linear-gradient(180deg,var(--clear) 63%,var(--hl) 63%,var(--hl) 93%,var(--clear) 93%);padding:0 .03em}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:54px;padding:12px 34px;border:0;border-radius:var(--r-pill);font-size:17px;font-weight:700;letter-spacing:.01em;flex-shrink:0;white-space:nowrap;transition:transform var(--fast) var(--ease),box-shadow var(--fast) var(--ease)}
.btn-solid,.btn-primary{background:linear-gradient(180deg,var(--ink),var(--ink-deep));color:var(--on-ink);box-shadow:inset 0 1px 0 var(--hairline-light),0 14px 28px -10px var(--shadow-cta)}
.btn-line,.btn-secondary{background:var(--panel);color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--ink)}
.btn:hover:not(:disabled){transform:translateY(-1px)}
.btn-solid:hover,.btn-primary:hover{box-shadow:inset 0 1px 0 var(--hairline-light),0 18px 32px -10px var(--shadow-cta)}
.btn:active:not(:disabled){transform:translateY(0)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;pointer-events:none}
.btn-small{min-height:40px;padding:8px 20px;font-size:14px}
.btn svg{width:16px;height:16px}
.cta-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.site-head{position:relative;z-index:50}
.site-head>.wrap{display:flex;align-items:center;gap:24px;height:var(--head-height);flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none;min-height:32px}
.brand img,.brand svg{width:32px;height:32px;flex:none}
.brand-word{font-family:var(--font-display);font-size:19px;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.nav{flex:1;min-width:0;margin-left:auto}
.nav-list{display:flex;align-items:center;justify-content:flex-end;gap:20px;list-style:none;margin:0;padding:0}
.nav-list a{display:inline-flex;align-items:center;min-height:32px;white-space:nowrap;font-size:14px;font-weight:500;color:var(--muted);transition:color var(--fast) var(--ease)}
.nav-list a:hover,.nav-list a[aria-current="page"]{color:var(--ink)}
.nav-list a[aria-current="page"]{font-weight:700}
.head-tools{display:flex;align-items:center;gap:14px;flex-shrink:0}
.login{display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 22px;border-radius:var(--r-pill);background:linear-gradient(180deg,var(--ink),var(--ink-deep));color:var(--on-ink);font-size:14.5px;font-weight:700;white-space:nowrap;box-shadow:inset 0 1px 0 var(--hairline-light),0 8px 18px -8px var(--shadow-cta)}
.lang-box{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:5px;min-height:40px;min-width:44px;width:auto;padding:6px 4px;border:0;background:var(--clear);font-size:14px;color:var(--muted)}
.lang span{white-space:nowrap}
.lang-caret{font-size:11px}
.lang-panel{position:absolute;right:0;top:calc(100% + 8px);z-index:80;min-width:172px;padding:8px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:0 20px 48px var(--shadow-1)}
.lang-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:var(--r-ctl)}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--hl);color:var(--ink)}
.menu-toggle{display:none;min-width:44px;min-height:44px;align-items:center;justify-content:center;flex-direction:column;gap:5px;border:1px solid var(--border);border-radius:var(--r-ctl);background:var(--panel);color:var(--ink)}
.menu-line{display:block;width:20px;height:2px;background:currentColor;border-radius:var(--r-pill)}
.mobile-drawer{display:none}
.menu-veil{display:none}
html.nav-open{overflow:hidden}
.site-footer{position:relative;border-top:1px solid var(--border);background:var(--panel-2);padding-top:64px;padding-bottom:28px}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1.2fr;gap:48px}
.footer-brand p{max-width:28em;color:var(--muted);font-size:14px}
.footer-title{font-size:15px;font-weight:800;margin:0 0 16px}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 20px;list-style:none;margin:0;padding:0}
.footer-links a{display:inline-flex;align-items:center;min-height:28px;font-size:14px}
.footer-links a:hover{color:var(--wisteria)}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 24px;padding-top:32px}
.footer-languages a{display:inline-flex;align-items:center;min-height:32px;font-size:14px}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-top:24px;padding-top:20px;border-top:1px solid var(--border-strong);color:var(--muted);font-size:13px}
.footer-legal{display:flex;flex-wrap:wrap;gap:20px}
.footer-legal a{display:inline-flex;align-items:center;min-height:28px}
.prose{min-width:0;line-height:1.9}
.prose h2{margin-top:2em}
.prose h3{margin-top:1.6em}
.prose p{margin-block:1em}
.prose a{color:var(--wisteria);text-decoration:underline;text-underline-offset:3px}
.prose li+li{margin-top:8px}
.prose blockquote{margin-inline:0}
.reveal{transition:opacity var(--reveal-time) var(--ease),transform var(--reveal-time) var(--ease)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
[data-count]{display:inline-block;min-width:3ch;font-family:var(--font-mono);font-variant-numeric:tabular-nums;text-align:right}
#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}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.ico{width:18px;height:18px;flex:none;color:var(--ink)}
.flag{width:22px;height:15px;flex:none;overflow:hidden;border-radius:var(--r-mini)}
.flag-sq{width:15px;height:15px;flex:none;overflow:hidden;border-radius:var(--r-mini)}
.fr{fill:var(--flag-red)}.fw{fill:var(--flag-white)}.fb{fill:var(--flag-blue)}
.fedge{fill:none;stroke:var(--flag-edge);stroke-width:1}
@media(max-width:1240px){
  .site-head>.wrap{gap:18px}
  .nav-list{gap:14px}
  .nav-list a{font-size:13px}
  .head-tools{gap:10px}
}
@media(max-width:1120px){
  .nav{display:none}
  .head-tools{margin-left:auto}
  .menu-toggle{display:inline-flex}
  .mobile-drawer{display:block;position:fixed;inset-inline:0;top:var(--head-height);height:calc(100dvh - var(--head-height));max-height:calc(100dvh - var(--head-height));overflow-y:auto;overscroll-behavior:contain;background:var(--panel);z-index:45;padding:20px var(--gutter) 40px}
  .mobile-drawer .nav-list{flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;width:100%}
  .mobile-drawer .nav-list li{width:100%;min-width:0}
  .mobile-drawer a{display:flex;width:100%;align-items:center;min-height:48px;padding:12px 16px;border-bottom:1px solid var(--border-soft)}
  .mobile-drawer a[aria-current]{background:var(--hl);font-weight:700}
  .drawer-languages{margin-top:24px;padding-top:16px;border-top:1px solid var(--border)}
  .menu-veil{display:block;position:fixed;inset:var(--head-height) 0 0;z-index:40;background:var(--veil);border:0}
  .footer-grid{gap:32px}
}
@media(max-width:768px){
  :root{--gutter:20px;--head-height:64px;--anchor-offset:84px;--toc-offset:80px;--section-space:56px}
  h1{font-size:40px}
  h2{font-size:30px}
  .site-head>.wrap{gap:12px}
  .head-tools{gap:10px;margin-left:auto}
  .brand-word{font-size:17px}
  .brand img{width:28px;height:28px}
  .lang{font-size:12px}
  .login{padding-inline:16px;font-size:13px}
  .footer-grid{grid-template-columns:1fr}
  .panel,.card{padding:22px}
}
@media(max-width:640px){
  .no-break{white-space:normal}
  .tilt,[data-tilt]{transform:none!important}
  .decoration{max-width:100%}
  .head-tools{gap:6px}
  .brand{gap:6px}
  .brand-word{font-size:15px}
  .brand img{width:26px;height:26px}
  .lang{font-size:11px;padding-inline:2px}
  .login{padding-inline:13px}
  .reading-wrap{padding-inline:var(--gutter)}
}
@media(max-width:359px){
  :root{--gutter:16px}
  .brand-word{font-size:14px}
  .brand img{width:24px;height:24px}
  .head-tools{gap:4px}
  .login{padding-inline:11px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:0s!important;animation-duration:0s!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}