:root{
  --bg:#E4EFF1;--panel:#F7FBFC;--panel-2:#D6E6EA;--border:#C6D9DE;
  --accent:#E8930C;--accent-dark:#A8620A;--text:#14222A;--muted:#5A6E76;
  --success:#1F9D6A;--warn:#C9A20E;--error:#D13B3B;
  --hero-top:#EEF6F7;--hero-bottom:#DCEAEE;--section-2:#EAF3F5;--line:#A9C3CA;
  --badge-bg:#FDEFD3;--badge-line:#F2C77A;--accent-wash:#FCF1DC;
  --amber-soft:#FBE6C2;--amber-softer:#F8EEDB;
  --rose:#F6DCE1;--rose-ink:#B44A5E;--mint:#D3EFE2;--mint-ink:#2C8A62;
  --sky:#D4E8F4;--sky-soft:#E6F1F8;--sky-ink:#2B74A3;
  --lav:#E2DCF4;--lav-soft:#EEEAF9;--lav-ink:#6955AE;
  --glow-amber:rgba(232,147,12,.11);--glow-sky:rgba(47,120,168,.12);
  --glow-lav:rgba(105,85,174,.11);--glow-sky-deep:rgba(47,120,168,.14);
  --halo-amber:rgba(232,147,12,.09);--halo-sky:rgba(70,155,205,.07);
  --success-ring:rgba(31,157,106,.18);--hi:rgba(255,255,255,.95);
  --ink-hi:rgba(255,255,255,.14);--shadow-ink:rgba(20,34,42,.07);
  --texture:rgba(20,34,42,.07);--veil:rgba(20,34,42,.28);
  --ink-hover:#22343E;--on-ink:#F7FBFC;--clear:transparent;
  --flag-red:#D0283A;--flag-blue:#22408A;--flag-paper:#FFFFFF;
  --r-xs:4px;--r-sm:6px;--r-md:8px;--r-tile:10px;--r-lg:12px;--r-ct:14px;--r-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","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --gutter:24px;--wrap-width:1240px;--reading-width:800px;--header-height:60px;
  --anchor-offset:76px;--toc-offset:136px;
  --size-body:16px;--size-small:14px;--size-h1:clamp(52px,4.75vw,68px);
  --size-h2:40px;--size-h3:22px;--weight-display:900;--weight-body:400;
  --tracking-display:-.03em;--leading-body:1.75;
  --shadow-panel:inset 0 1px 0 var(--hi),0 1px 2px var(--shadow-ink),0 14px 32px var(--glow-sky);
}
*{box-sizing:border-box;margin:0;padding:0}
html{background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--size-body);scroll-padding-top:var(--anchor-offset);scroll-behavior:smooth;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body{min-height:100vh;background:var(--bg);line-height:var(--leading-body)}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button,select,input,textarea{max-width:100%}
img,svg{max-width:100%;vertical-align:middle}
img{height:auto}
svg{flex-shrink:0}
ul{list-style:none}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:var(--r-sm)}
::selection{background:var(--badge-bg);color:var(--text)}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--text);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:var(--size-h1);font-weight:var(--weight-display);line-height:1.12;letter-spacing:var(--tracking-display)}
h2{font-size:var(--size-h2);font-weight:var(--weight-display);line-height:1.2;letter-spacing:-.025em}
h3{font-size:var(--size-h3);font-weight:800;line-height:1.4}
p{overflow-wrap:break-word}
code{font-family:var(--font-mono);overflow-wrap:anywhere;font-size:.9em}
pre{max-width:100%;min-width:0;overflow-x:auto;padding:20px;background:var(--panel-2);border:1px solid var(--border);border-radius:var(--r-md);line-height:1.65}
pre code{overflow-wrap:normal;white-space:pre}
table{border-collapse:collapse}
th,td{text-align:left}
.wrap{width:100%;max-width:var(--wrap-width);margin-inline:auto;padding-inline:var(--gutter);min-width:0}
.reading-wrap{width:100%;max-width:var(--reading-width);margin-inline:auto;padding-inline:var(--gutter);min-width:0}
.section{padding-top:80px;padding-bottom:80px}
.section-head{max-width:720px;margin:0 auto 40px;text-align:center}
.section-head p{margin-top:14px;color:var(--muted);font-size:18px}
.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}
.grid-three>*,.grid-five>*,.client__body>*,.footer-grid>*,.object-browser>*{min-width:0}
.panel,.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-panel);padding:24px;min-width:0}
.card p{margin-top:12px;color:var(--muted)}
.no-break{white-space:nowrap}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.muted{color:var(--muted)}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.ic-stroke{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.btn,.btn-primary,.btn-secondary,.btn-ghost,.login-btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;flex-shrink:0;white-space:nowrap;min-height:44px;border-radius:var(--r-md);font-size:16px;font-weight:700;line-height:1.3;transition:background-color .2s,transform .2s}
.btn,.btn-primary{height:48px;padding:0 24px 0 20px;border:1px solid var(--text);background:var(--text);color:var(--on-ink);box-shadow:inset 0 1px 0 var(--ink-hi),0 1px 2px var(--shadow-ink),0 12px 28px var(--glow-sky)}
.btn:hover,.btn-primary:hover,.button-hover{background:var(--ink-hover);transform:translateY(-1px)}
.btn-secondary{padding:12px 20px;border:1px solid var(--border);background:var(--panel);color:var(--text);box-shadow:inset 0 1px 0 var(--hi)}
.btn-secondary:hover{background:var(--hero-top)}
.btn-ghost{height:48px;padding:0 16px;color:var(--text);background:var(--clear);border:1px solid var(--clear);font-weight:600;gap:9px}
.btn-ghost:hover{background:var(--panel)}
.btn svg,.btn-primary svg,.btn-ghost svg,.btn-secondary svg{width:18px;height:18px;flex-shrink:0}
button:disabled,.btn[aria-disabled="true"]{background:var(--panel-2);color:var(--muted);border-color:var(--border);cursor:not-allowed;box-shadow:none;transform:none}
.cta-row{margin-top:24px;display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:12px}
.text-link{display:inline-flex;align-items:center;min-height:24px;color:var(--accent-dark);font-weight:600;text-decoration:underline;text-underline-offset:4px}
.topbar{position:relative;z-index:20;background:var(--panel);border-bottom:1px solid var(--border)}
.topbar__inner{max-width:1240px;margin:0 auto;height:var(--header-height);padding:0 var(--gutter);display:flex;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;min-height:28px}
.brand__mark{width:28px;height:28px;flex-shrink:0}
.brand__en{font-family:var(--font-display);font-weight:900;font-size:19px;letter-spacing:-.02em;color:var(--text)}
.mainnav{flex:1;display:flex;justify-content:center;min-width:0}
.mainnav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px;border-radius:var(--r-pill)}
.mainnav a{display:flex;align-items:center;justify-content:center;padding:7px 13px;min-height:32px;border-radius:var(--r-pill);font-size:14px;font-weight:500;color:var(--muted);white-space:nowrap;transition:color .2s,background-color .2s}
.mainnav a:hover{color:var(--text);background:var(--hero-top)}
.mainnav a[aria-current="page"]{color:var(--text);font-weight:700;background:var(--panel-2);box-shadow:inset 0 1px 0 var(--hi)}
.topbar__tools{display:flex;align-items:center;gap:6px;flex-shrink:0;margin-left:auto}
.lang{font:inherit;font-size:14px;font-weight:500;color:var(--muted);background:var(--clear);border:0;padding:8px 10px;min-height:36px;min-width:44px;width:auto;white-space:nowrap;border-radius:var(--r-sm);cursor:pointer}
.lang:hover{color:var(--text);background:var(--hero-top)}
.login-btn{height:36px;min-height:36px;padding:0 18px;border:0;background:var(--text);color:var(--on-ink);font-size:14px;box-shadow:inset 0 1px 0 var(--ink-hi)}
.login-btn:hover{background:var(--ink-hover)}
.language-box{position:relative}
.language-menu{position:absolute;right:0;top:calc(100% + 8px);width:190px;padding:6px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--shadow-panel)}
.language-menu a{display:flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:var(--r-sm)}
.language-menu a:hover,.language-menu a[aria-current]{background:var(--panel-2)}
.menu-toggle{display:none;min-width:44px;min-height:44px;background:var(--clear);border:1px solid var(--border);border-radius:var(--r-md)}
.menu-toggle svg{width:22px;height:22px}
.mobile-drawer{position:absolute;top:100%;left:0;right:0;z-index:22;padding:16px var(--gutter) 24px;background:var(--panel);border-bottom:1px solid var(--border);max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain}
.mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:10px 14px;border-radius:var(--r-md);color:var(--text)}
.mobile-drawer a:hover,.mobile-drawer a[aria-current="page"]{background:var(--panel-2)}
.drawer-languages{border-top:1px solid var(--border);margin-top:12px;padding-top:12px}
.drawer-caption{font-size:13px;color:var(--muted);padding:8px 14px}
.nav-veil{position:fixed;inset:var(--header-height) 0 0;z-index:19;background:var(--veil);border:0}
html.nav-open{overflow:hidden}
.site-footer{background:var(--panel-2);border-top:1px solid var(--border);padding-top:56px;padding-bottom:24px}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1.2fr;gap:48px}
.footer-brand p{margin-top:16px;color:var(--muted);max-width:340px}
.footer-heading{font-size:14px;font-weight:800;margin-bottom:14px}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px 16px}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:28px;font-size:14px}
.footer-links a:hover,.footer-languages a:hover,.footer-legal a:hover{text-decoration:underline;text-underline-offset:4px}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 20px;padding-top:28px;margin-top:32px;border-top:1px solid var(--border)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-top:20px;font-size:13px;color:var(--muted)}
.footer-legal{display:flex;flex-wrap:wrap;gap:8px 20px}
.prose{line-height:1.85;min-width:0}
.prose p,.prose ul,.prose ol,.prose pre,.prose table{margin-block:20px}
.prose h2{margin-top:48px;margin-bottom:20px;font-size:32px}
.prose h3{margin-top:32px;margin-bottom:12px}
.prose ul{list-style:disc;padding-left:1.4em}
.prose ol{padding-left:1.4em}
.prose a{text-decoration:underline;text-underline-offset:4px;color:var(--accent-dark)}
.prose section[id]{scroll-margin-top:var(--anchor-offset)}
body:has(.toc-tabs) section[id]{scroll-margin-top:var(--toc-offset)}
.reveal{transition:opacity .6s ease,transform .6s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:relative;display:block;min-height:80px;max-width:100%;min-width:0;overflow:hidden;margin-top:24px;margin-bottom:24px}
#server-status>*{max-width:100%;min-width:0}
#server-status+*{margin-top:24px}
@media(max-width:1180px){
  .mainnav{display:none}
  .menu-toggle{display:inline-grid;place-items:center}
  .topbar__tools{margin-left:auto}
}
@media(min-width:1181px){.mobile-drawer,.nav-veil{display:none!important}}
@media(max-width:768px){
  :root{--size-h1:clamp(28px,5vw,40px);--size-h2:30px;--gutter:20px}
  .section{padding-top:56px;padding-bottom:56px}
  .grid-three{grid-template-columns:1fr}
  .grid-five{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}
  .topbar__inner{gap:10px}
  .lang{padding-inline:8px}
  .login-btn{padding-inline:14px}
  .section-head p{font-size:16px}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .no-break{white-space:normal}
  .tilt,.note,.isq{transform:none}
  [data-hero-visual],.hero__glow{max-width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
  .topbar__inner{gap:6px}
  .topbar__tools{gap:4px;margin-left:auto}
  .brand{gap:7px}
  .brand__en{font-size:17px}
  .brand__mark{width:26px;height:26px}
  .login-btn{padding-inline:12px}
  .panel,.card{padding:20px}
  .prose h2{font-size:28px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}