:root{
  --bg:#FCF5EC;
  --bg-panel:#FFFDF9;
  --bg-panel-2:#F6E6D6;
  --border:#EADBC9;
  --border-soft:#F1E5D7;
  --accent:#EC6D4C;
  --accent-soft:#F2876A;
  --accent-dark:#C24F2E;
  --text:#2E2621;
  --text-muted:#786A5F;
  --success:#2F8F5B;
  --warn:#C98A14;
  --error:#C2413A;
  --link:#5A63C4;
  --hero-top:#FEF9F2;
  --hero-bottom:#F8EDDF;
  --tray-low:#F2DECB;
  --side:#F8F0E6;
  --paper-tint:#FBF4EA;
  --chrome-1:#E9B9A6;
  --chrome-2:#EBD3AE;
  --chrome-3:#DCCFC1;
  --accent-a06:rgba(236,109,76,.06);
  --accent-a08:rgba(236,109,76,.08);
  --accent-a10:rgba(236,109,76,.10);
  --accent-a14:rgba(236,109,76,.14);
  --accent-a25:rgba(236,109,76,.25);
  --accent-a30:rgba(236,109,76,.28);
  --accent-a40:rgba(236,109,76,.40);
  --accent-a60:rgba(236,109,76,.60);
  --success-a12:rgba(47,143,91,.12);
  --link-a12:rgba(90,99,196,.12);
  --hi:rgba(255,255,255,.92);
  --hi-soft:rgba(255,255,255,.35);
  --veil:rgba(46,38,33,.24);
  --flag-red:#D0353F;
  --flag-white:#FFFFFF;
  --flag-blue:#274A9C;
  --flag-navy:#26346B;
  --flag-edge:rgba(46,38,33,.12);
  --clear:transparent;
  --radius-tray:32px;
  --radius-card:28px;
  --radius-win:20px;
  --radius-md:14px;
  --radius-sm:8px;
  --radius-mini:4px;
  --radius-dot:50%;
  --radius-pill:999px;
  --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;
  --text-xs:12px;
  --text-sm:14px;
  --text-base:16px;
  --text-lede:19px;
  --title-display:68px;
  --title-section:40px;
  --title-card:28px;
  --gutter:24px;
  --content-width:1248px;
  --header-height:68px;
  --anchor-offset:84px;
  --toc-offset:148px;
  --ease-time:.2s;
  --shadow-panel:inset 0 1px 0 var(--hi),0 24px 60px -30px var(--accent-a25);
  --grain:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .18 0 0 0 0 .14 0 0 0 0 .11 0 0 0 .6 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23g)' opacity='.1'/%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-color:var(--bg);background-image:var(--grain);color:var(--text);font-family:var(--font-body);font-size:var(--text-base);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
button,a,summary{-webkit-tap-highlight-color:var(--accent-a14)}
button{color:inherit}
img,svg{vertical-align:middle;max-width:100%}
img{height:auto}
svg{flex-shrink:0}
h1,h2,h3{font-family:var(--font-display);line-height:1.2;text-wrap:balance;overflow-wrap:break-word}
h1{font-size:clamp(52px,5vw,72px);font-weight:800;letter-spacing:-.02em}
h2{font-size:var(--title-section);font-weight:800;letter-spacing:-.02em}
h3{font-size:var(--title-card);font-weight:800;letter-spacing:-.02em}
p,li{overflow-wrap:break-word}
code{font-family:var(--font-mono);overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--paper-tint);border:1px solid var(--border);border-radius:var(--radius-md)}
pre code{white-space:pre;overflow-wrap:normal}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--accent-dark);outline-offset:3px}
[hidden]{display:none!important}
.no-break{white-space:nowrap}
.wrap{width:100%;max-width:var(--content-width);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:64px;padding-bottom:64px}
.section-head{margin-bottom:32px}
.section-head h2{margin:0}
.section-head p{margin:12px 0 0;color:var(--text-muted)}
.center{text-align:center}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono)}
.panel,.card{padding:28px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow-panel)}
.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,.win,.secs,.footer-grid)>*{min-width:0}
.prose{max-width:78ch;margin-inline:auto}
.prose p,.prose li{line-height:1.85}
.prose h2{margin-top:48px;font-size:32px}
.prose h3{margin-top:32px;font-size:24px}
.prose a:not(.btn){color:var(--accent-dark);text-decoration:underline;text-underline-offset:3px}
.prose img{border-radius:var(--radius-md)}
.btn,.btn-line,.btn-login{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;flex-shrink:0;
  min-height:44px;padding:10px 24px;border:0;border-radius:var(--radius-pill);
  font-weight:700;line-height:1.4;text-align:center;white-space:nowrap;
  transition:transform var(--ease-time),background var(--ease-time),box-shadow var(--ease-time);
}
.btn{height:50px;padding:0 28px;font-size:var(--text-base);letter-spacing:.01em}
.btn svg{width:16px;height:16px}
.btn-primary{background:linear-gradient(180deg,var(--accent-soft),var(--accent));color:var(--bg-panel);box-shadow:inset 0 1px 0 var(--hi-soft),0 14px 26px -12px var(--accent-a60)}
.btn-primary:hover{transform:translateY(-1px);background:linear-gradient(180deg,var(--accent),var(--accent-dark))}
.btn-primary:active{transform:translateY(0)}
.btn-ghost,.btn-secondary{border:1.5px solid var(--text);color:var(--text);background:var(--clear)}
.btn-ghost:hover,.btn-secondary:hover,.btn-line:hover{background:var(--bg-panel)}
.btn-line{min-height:40px;padding:8px 20px;border:1.5px solid var(--text);background:var(--clear);font-size:14.5px;font-weight:600}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.btn-login{height:40px;min-height:40px;padding:0 22px;background:var(--text);color:var(--bg-panel);font-size:14.5px;box-shadow:0 8px 18px -10px var(--accent-a60)}
.btn-login:hover{background:var(--accent-dark)}
#site-header,.topbar{position:relative;z-index:60;min-height:var(--header-height)}
.topbar-in{height:var(--header-height);display:flex;align-items:center;gap:44px;flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;min-height:32px}
.brand-mark{width:32px;height:32px;flex:none;border-radius:var(--radius-dot)}
.brand-word{font-family:var(--font-display);font-weight:800;font-size:20px;letter-spacing:-.02em;white-space:nowrap}
.brand-zh{color:var(--text-muted);font-weight:500}
.mainnav{flex:1;min-width:0;color:var(--text-muted);font-size:15px}
.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;padding-block:6px;font-weight:500;white-space:nowrap}
.mainnav a:hover,.mainnav a[aria-current="page"]{color:var(--text)}
.mainnav a[aria-current="page"]{font-weight:700}
.topbar-end{margin-left:auto;display:flex;align-items:center;gap:18px;flex-shrink:0}
.language{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:4px;min-width:44px;min-height:40px;width:auto;padding:6px 4px;background:var(--clear);border:0;color:var(--text-muted);font-size:var(--text-sm)}
.lang span{white-space:nowrap}
.lang svg{width:12px;height:12px}
.lang-panel{position:absolute;top:calc(100% + 8px);right:0;z-index:80;width:190px;padding:8px;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg-panel);box-shadow:var(--shadow-panel)}
.lang-panel a{display:flex;align-items:center;width:100%;min-height:44px;padding:8px 12px;border-radius:var(--radius-sm)}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--bg-panel-2)}
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:5px;min-width:44px;min-height:44px;padding:10px;border:1px solid var(--border);border-radius:var(--radius-pill);background:var(--bg-panel);color:var(--text)}
.menu-line{display:block;width:20px;height:2px;background:currentColor;border-radius:var(--radius-mini)}
.mobile-drawer{display:none;position:fixed;top:var(--header-height);right:0;left:0;z-index:55;height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));padding:16px var(--gutter) 32px;background:var(--bg-panel);overflow-y:auto;overscroll-behavior:contain}
.mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px 16px;border-bottom:1px solid var(--border-soft)}
.mobile-drawer a[aria-current]{font-weight:700;color:var(--accent-dark)}
.drawer-languages{padding-top:16px;margin-top:16px;border-top:1px solid var(--border)}
.nav-veil{position:fixed;inset:var(--header-height) 0 0;z-index:50;border:0;background:var(--veil);width:100%}
html.nav-open{overflow:hidden}
.site-footer{padding-top:56px;padding-bottom:28px;border-top:1px solid var(--border);background:var(--side)}
.footer-grid{display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:48px}
.footer-brand p{max-width:30em;color:var(--text-muted);font-size:var(--text-sm)}
.footer-heading{margin:0 0 16px;font-size:var(--text-base);font-weight:700}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 18px;list-style:none;margin:0;padding:0}
.footer-links a{display:inline-flex;align-items:center;min-height:28px;font-size:var(--text-sm)}
.footer-links a:hover{text-decoration:underline;text-underline-offset:4px}
.footer-languages{display:flex;flex-wrap:wrap;gap:12px 24px;margin-top:32px}
.footer-languages a{display:inline-flex;align-items:center;min-height:28px;font-size:var(--text-sm)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;margin-top:24px;padding-top:24px;border-top:1px solid var(--border);font-size:var(--text-xs);color:var(--text-muted)}
.footer-bottom p{margin:0}
.reveal{transition:opacity .35s ease,transform .35s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:relative;display:block;min-height:240px;max-width:100%;overflow:hidden;margin-top:24px;margin-bottom:32px}
#server-status+*{margin-top:32px}
#server-status>*{min-width:0;max-width:100%}
.decorated,.shell{position:relative;overflow-x:clip;max-width:100%}
.tilt{transform:rotate(.45deg)}
@media(max-width:1200px){
  .topbar-in{gap:24px}
  .mainnav ul{gap:18px}
  .mainnav{font-size:var(--text-sm)}
  .topbar-end{gap:12px}
}
@media(max-width:1060px){
  .mainnav{display:none}
  .menu-toggle{display:inline-flex}
  .mobile-drawer:not([hidden]){display:block}
  .topbar-end{margin-left:auto}
  .footer-grid{gap:24px}
}
@media(max-width:768px){
  h1{font-size:clamp(28px,6vw,40px)}
  h2{font-size:32px}
  .grid-three{grid-template-columns:minmax(0,1fr)}
  .grid-five{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .section{padding-top:40px;padding-bottom:40px}
}
@media(max-width:640px){
  :root{--gutter:16px;--title-section:28px;--title-card:24px}
  .no-break{white-space:normal}
  .wrap{width:100%;padding-inline:var(--gutter)}
  .tilt,[data-tilt]{transform:none}
  .decorated,.shell{max-width:100%}
  .topbar-in{gap:8px}
  .topbar-end{gap:6px;margin-left:auto}
  .brand{gap:6px}
  .brand-word{font-size:17px}
  .brand-mark{width:28px;height:28px}
  .btn-login{padding-inline:13px;font-size:var(--text-sm)}
  .lang{font-size:11px;padding-inline:2px}
  .lang svg{display:none}
  .panel,.card{padding:20px}
  .prose h2{font-size:28px}
  .prose h3{font-size:22px}
}
@media(max-width:359px){
  .brand-word{font-size:15px}
  .brand-mark{width:24px;height:24px}
  .topbar-end{gap:4px}
  .btn-login{padding-inline:10px}
  .lang{font-size:10px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}