:root{
  --bg:#E4EAF7;
  --bg-top:#EEF2FB;
  --bg-btm:#DCE3F3;
  --panel:#F6F8FD;
  --panel-2:#D9E1F1;
  --border:#C9D3E8;
  --border-soft:rgba(201,211,232,.72);
  --accent:#7A4DF0;
  --accent-dark:#5530C4;
  --accent-2:#D23C9A;
  --text:#141833;
  --muted:#586082;
  --faint:#8A92B2;
  --success:#13976A;
  --success-soft:rgba(19,151,106,.18);
  --warn:#C27A0C;
  --error:#CF3248;
  --on-accent:#FFFFFF;
  --on-ink:#FFFFFF;
  --ink:#161A33;
  --ink-2:#1E2344;
  --ink-3:#2A3158;
  --ink-deep:#0F1228;
  --ink-text:#E7EAF8;
  --ink-muted:#9097BC;
  --ink-faint:#666D96;
  --ink-param:#BCA9FF;
  --ink-line:rgba(255,255,255,.07);
  --ink-hi:rgba(255,255,255,.11);
  --ink-tab:rgba(231,234,248,.13);
  --ink-row:rgba(255,255,255,.03);
  --ink-row-on:rgba(122,77,240,.16);
  --ink-sel:rgba(122,77,240,.28);
  --ink-sel-line:rgba(188,169,255,.55);
  --ink-sheen:rgba(255,255,255,.08);
  --glow-a:rgba(122,77,240,.30);
  --glow-b:rgba(210,60,154,.20);
  --accent-06:rgba(122,77,240,.06);
  --accent-08:rgba(122,77,240,.08);
  --accent-12:rgba(122,77,240,.12);
  --accent-18:rgba(122,77,240,.18);
  --pink-05:rgba(210,60,154,.05);
  --glass:rgba(246,248,253,.76);
  --glass-line:rgba(255,255,255,.9);
  --topbar-bg:rgba(238,242,251,.84);
  --veil:rgba(20,24,51,.32);
  --clear:transparent;
  --grad:linear-gradient(118deg,var(--accent) 0%,var(--accent-2) 100%);
  --flag-red:#D8202F;
  --flag-white:#FFFFFF;
  --flag-blue:#22397F;
  --flag-fr-blue:#1F44A0;
  --flag-black:#1C1C22;
  --flag-gold:#F2B705;
  --flag-edge:rgba(20,24,51,.16);
  --r-line:1px;
  --r-track:2px;
  --r-xs:4px;
  --r-sm:6px;
  --r-md:8px;
  --r-lg:10px;
  --r-pill:999px;
  --r-circle:50%;
  --f-display:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --f-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --gutter:40px;
  --wrap-max:1320px;
  --header-h:65px;
  --anchor-gap:81px;
  --toc-offset:145px;
  --section-space:72px;
  --shadow-panel:0 16px 40px -20px var(--accent-12);
  --time-fast:.15s;
  --time-reveal:.35s;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-gap);scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--f-body);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}
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}
p,h1,h2,h3,h4,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{border:0}
[hidden]{display:none!important}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--accent-dark);outline-offset:3px}
code,kbd,pre{font-family:var(--f-mono)}
code{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-md);line-height:1.7}
pre code{overflow-wrap:normal;white-space:pre}
h1,h2,h3{text-wrap:balance;overflow-wrap:break-word}
h1{margin-top:22px;font-family:var(--f-display);font-weight:900;font-size:64px;line-height:1.06;letter-spacing:-.03em;color:var(--text)}
h2{font-family:var(--f-display);font-size:32px;font-weight:800;line-height:1.2;letter-spacing:-.02em}
h3{font-size:20px;line-height:1.4;font-weight:700}
.ic{fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.no-break{white-space:nowrap}
.wrap{width:100%;max-width:var(--wrap-max);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--section-space);padding-bottom:var(--section-space)}
.stack{display:grid;gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
:where(.grid-2,.grid-3,.hero-grid,.win-body,.footer-grid)>*{min-width:0}
.panel,.card{padding:24px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--shadow-panel)}
.panel-inset{background:var(--panel-2)}
.muted{color:var(--muted)}
.mono{font-family:var(--f-mono)}
.text-link{display:inline-flex;align-items:center;min-height:24px;text-decoration:underline;text-underline-offset:5px;color:var(--text)}
.text-link:hover{color:var(--accent-dark)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:50px;padding:0 24px;border:1px solid var(--clear);border-radius:var(--r-md);font-size:16px;font-weight:700;white-space:nowrap;flex-shrink:0;transition:opacity var(--time-fast),background-color var(--time-fast),color var(--time-fast)}
.btn-primary{background:var(--grad);color:var(--on-accent)}
.btn-primary:hover{opacity:.92}
.btn-ghost{border:1.5px solid var(--ink);color:var(--ink);background:var(--clear)}
.btn-ghost:hover{background:var(--ink);color:var(--on-ink)}
.btn-secondary{background:var(--ink);color:var(--on-ink)}
.btn-secondary:hover{opacity:.88}
.btn:active{transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;pointer-events:none}
.btn-small{height:40px;padding-inline:16px;font-size:14px}
.badge{display:inline-flex;align-items:center;gap:9px;min-height:32px;padding:5px 14px 5px 12px;border-radius:var(--r-pill);background:var(--panel);border:1px solid var(--border);font-size:13px;font-weight:500;color:var(--text);max-width:100%;overflow-wrap:anywhere}
.badge-dot{width:7px;height:7px;border-radius:var(--r-circle);background:var(--success);box-shadow:0 0 0 4px var(--success-soft);flex-shrink:0}
#site-header,.preview-header{position:sticky;top:0;z-index:50}
.topbar{position:relative;z-index:53;background:var(--topbar-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border-soft)}
.topbar-in{display:flex;align-items:center;gap:36px;min-height:64px;flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;min-height:32px}
.brand-mark{display:block;width:32px;height:32px}
.brand-en{font-family:var(--f-display);font-weight:900;font-size:19px;letter-spacing:-.02em;color:var(--text)}
.brand-zh{font-size:13.5px;font-weight:500;color:var(--muted);padding-left:10px;border-left:1px solid var(--border)}
.mainnav{flex:1;min-width:0}
.mainnav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:26px}
.mainnav a{display:inline-flex;align-items:center;min-height:32px;font-size:14.5px;font-weight:500;color:var(--muted);white-space:nowrap;transition:color var(--time-fast)}
.mainnav a:hover{color:var(--text)}
.mainnav a[aria-current="page"]{color:var(--text);font-weight:700}
.topbar-tools{margin-left:auto;display:flex;align-items:center;gap:16px;flex-shrink:0}
.language{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:36px;padding:0 4px 0 16px;border:0;border-left:1px solid var(--border);background:var(--clear);font-size:14px;font-weight:500;color:var(--muted);cursor:pointer;white-space:nowrap;width:auto;min-width:44px}
.lang span{white-space:nowrap}
.lang-caret{font-size:11px;color:var(--faint)}
.lang-panel{position:absolute;right:0;top:calc(100% + 12px);z-index:60;min-width:180px;padding:8px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--shadow-panel)}
.lang-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:var(--r-sm);font-size:14px}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--panel-2)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;height:38px;padding:0 20px;border-radius:var(--r-md);background:var(--ink);color:var(--on-ink);font-size:14px;font-weight:600;white-space:nowrap;transition:opacity var(--time-fast)}
.btn-login:hover{opacity:.88}
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:5px;min-width:44px;min-height:44px;background:var(--clear);color:var(--text);border:1px solid var(--border);border-radius:var(--r-sm)}
.menu-line{display:block;width:20px;height:2px;background:currentColor;border-radius:var(--r-line)}
.nav-drawer{display:none;position:fixed;inset-inline:0;top:var(--header-h);height:calc(100dvh - var(--header-h));max-height:calc(100dvh - var(--header-h));overflow-y:auto;overscroll-behavior:contain;z-index:52;padding:16px var(--gutter) 32px;background:var(--panel)}
.nav-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px 16px;border-bottom:1px solid var(--border);font-size:16px}
.nav-drawer a[aria-current="page"],.nav-drawer a[aria-current="true"]{font-weight:700;background:var(--panel-2)}
.drawer-languages{margin-top:24px;padding-top:12px;border-top:1px solid var(--border)}
.drawer-label{padding:8px 16px;font-size:13px;color:var(--muted)}
.nav-veil{display:none;position:fixed;inset:var(--header-h) 0 0;z-index:51;background:var(--veil)}
html.nav-open{overflow:hidden}
.footer{background:var(--panel-2);border-top:1px solid var(--border);padding-top:48px;padding-bottom:24px}
.footer-grid{display:grid;grid-template-columns:1.2fr 1.5fr 1fr;gap:48px}
.footer-brand p{max-width:30em;margin-top:16px;color:var(--muted);font-size:14px;line-height:1.8}
.footer-heading{font-size:14px;font-weight:700;margin-bottom:14px}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 20px}
.footer-links a,.footer-keywords a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:28px;font-size:14px;color:var(--muted);overflow-wrap:anywhere}
.footer a:hover{color:var(--text);text-decoration:underline;text-underline-offset:4px}
.footer-keywords{display:grid;gap:8px}
.footer-languages{display:flex;flex-wrap:wrap;gap:12px 24px;margin-top:32px;padding-top:24px;border-top:1px solid var(--border)}
.footer-languages [aria-current="true"]{font-weight:700;color:var(--text)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;margin-top:24px;padding-top:20px;border-top:1px solid var(--border);font-size:13px;color:var(--muted)}
.footer-legal{display:flex;flex-wrap:wrap;gap:12px 20px}
.prose{max-width:78ch;line-height:1.9;overflow-wrap:anywhere}
.prose>*+*{margin-top:20px}
.prose h2{margin-top:48px}
.prose h3{margin-top:32px}
.prose ul,.prose ol{padding-left:1.5em;list-style:revert}
.prose li+li{margin-top:8px}
.prose a{text-decoration:underline;text-underline-offset:4px}
.prose code{font-size:.9em;background:var(--panel-2);padding:2px 5px;border-radius:var(--r-xs)}
.prose pre code{padding:0;background:var(--clear)}
.reveal{transition:opacity var(--time-reveal) ease,transform var(--time-reveal) ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{display:block;position:relative;min-width:0;max-width:100%;overflow:hidden;margin-block:24px}
#server-status+*{margin-top:24px}
#server-status :where(.grid,.server-grid){display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:12px;min-width:0}
#server-status :where(.grid,.server-grid)>*{min-width:0}
.decorated-section{position:relative;overflow-x:clip;max-width:100%}
.f-red{fill:var(--flag-red)}
.f-white{fill:var(--flag-white)}
.f-blue{fill:var(--flag-blue)}
.f-frblue{fill:var(--flag-fr-blue)}
.f-black{fill:var(--flag-black)}
.f-gold{fill:var(--flag-gold)}
.f-edge{fill:none;stroke:var(--flag-edge);stroke-width:1}
.s-a{stop-color:var(--accent)}
.s-b{stop-color:var(--accent-2)}
@media(max-width:1200px){
  .mainnav ul{gap:18px}
  .topbar-in{gap:24px}
  h1{font-size:56px}
}
@media(max-width:1100px){
  .brand-zh{display:none}
  .mainnav{display:none}
  .menu-toggle{display:inline-flex}
  .topbar-tools{margin-left:auto;gap:12px}
  html.nav-open .nav-drawer,html.nav-open .nav-veil{display:block}
}
@media(max-width:768px){
  :root{--gutter:20px;--section-space:48px}
  h1{font-size:40px}
  h2{font-size:26px}
  .grid-2,.grid-3{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:32px}
  .topbar-in{gap:12px}
  .decorated-section{max-width:100%}
}
@media(max-width:640px){
  .no-break{white-space:normal}
  .tilt,.decorative-tilt{transform:none}
  .lang{padding-left:10px;font-size:12px;gap:4px}
  .topbar-tools{gap:6px;margin-left:auto}
  .brand{gap:6px}
  .brand-en{font-size:17px}
  .brand-mark{width:28px;height:28px}
  .btn-login{padding-inline:12px;font-size:13px}
  .panel,.card{padding:20px}
}
@media(max-width:480px){
  h1{font-size:36px}
  .btn{padding-inline:20px}
}
@media(max-width:350px){
  :root{--gutter:16px}
  .brand-en{font-size:15px}
  .brand-mark{width:24px;height:24px}
  .lang{padding-left:6px;font-size:11px}
  .btn-login{padding-inline:10px}
  .topbar-tools{gap:4px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}