:root{
  color-scheme:light;
  --bg:#FAF3E7;--bg-panel:#FFFBF4;--bg-panel-2:#F3E8D6;
  --border:#E6D6BE;--border-strong:#CDB592;
  --accent:#0A8FAE;--accent-dark:#06657C;--abyss:#04485A;
  --text:#2B2118;--text-muted:#6E5E4E;
  --success:#2F9E5B;--warn:#D9861A;--error:#CC3D3D;
  --paper-top:#FDF8EF;--paper-bottom:#F3E8D6;--white:#FFFFFF;
  --peri:#7E8BE0;--peri-soft:#D8DCF7;--teal-soft:#CBEAF1;--teal-mist:#E6F4F6;
  --coral:#F1A38B;--apricot:#F5C78C;--apricot-soft:#FBE4C4;--mint:#C3E9D6;--sand:#E0C59C;
  --blob-peach:rgba(246,184,142,.50);--blob-cyan:rgba(136,206,222,.42);
  --star:rgba(120,82,48,.08);--grain:rgba(43,33,24,.03);
  --tint-12:rgba(10,143,174,.12);--tint-20:rgba(10,143,174,.20);
  --tint-30:rgba(10,143,174,.30);--tint-40:rgba(10,143,174,.40);
  --ink-06:rgba(43,33,24,.06);--ink-10:rgba(43,33,24,.10);--ink-30:rgba(43,33,24,.30);
  --ok-ring:rgba(47,158,91,.16);--hl:rgba(255,255,255,.95);
  --hl-soft:rgba(255,255,255,.60);--hl-dark:rgba(255,255,255,.22);
  --glare:rgba(200,238,245,.42);--mark:rgba(246,184,142,.50);--band-frame:rgba(243,232,214,.65);
  --flag-red:#D9363E;--flag-white:#FFFFFF;--flag-blue:#24479A;--flag-green:#1E9B5A;
  --clear:transparent;
  --r-band:48px;--r-xl:40px;--r-lg:28px;--r-md:16px;--r-sm:10px;--r-xs:6px;--r-pill:999px;--r-circle:50%;
  --font-display:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Microsoft YaHei","Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Microsoft YaHei","Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --fs-body:16px;--fs-small:14px;--fs-caption:12px;
  --fs-h1:clamp(52px,4.7vw,68px);--fs-h2:clamp(28px,3.2vw,44px);--fs-h3:22px;
  --gutter:40px;--wrap:1280px;--header-height:76px;--toc-height:64px;
  --shadow-panel:inset 0 1px 0 var(--hl),0 24px 54px -24px var(--tint-12);
  --ease:200ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--header-height) + 16px);scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--fs-body);line-height:1.6;-webkit-font-smoothing:antialiased}
[hidden]{display:none!important}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button,select,input,textarea{max-width:100%}
button{border:0}
img{display:block;max-width:100%;height:auto}
svg{width:20px;height:20px;flex-shrink:0;vertical-align:middle}
ul{list-style:none;margin:0;padding:0}
p,h1,h2,h3,h4,figure{margin:0}
h1,h2,h3{font-family:var(--font-display);text-wrap:balance;overflow-wrap:break-word}
h1,.h1{font-size:var(--fs-h1);font-weight:900;line-height:1.1;letter-spacing:-.02em}
h2{font-size:var(--fs-h2);font-weight:900;line-height:1.2;letter-spacing:-.02em}
h3{font-size:var(--fs-h3);font-weight:800;line-height:1.35}
:focus-visible{outline:2px solid var(--accent-dark);outline-offset:3px}
::selection{background:var(--teal-soft);color:var(--text)}
code{font-family:var(--font-mono);overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:24px;border:1px solid var(--border);border-radius:var(--r-md);background:var(--bg-panel-2)}
pre code{overflow-wrap:normal;white-space:pre}
table{border-collapse:collapse}
th,td{word-break:keep-all}
.no-break{white-space:nowrap}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.sec{padding-top:72px;padding-bottom:72px}
.stack{display:grid;gap:24px}
.grid{display:grid;gap:24px}
.grid>*{min-width:0}
.grid-three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-five{grid-template-columns:repeat(5,minmax(0,1fr))}
.section-head{margin-bottom:32px;max-width:800px}
.section-head p{margin-top:16px;color:var(--text-muted)}
.kicker{font-family:var(--font-mono);font-size:var(--fs-caption);font-weight:700;letter-spacing:.08em;color:var(--accent-dark);margin-bottom:12px}
.muted{color:var(--text-muted)}
.panel,.card{padding:28px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-panel);min-width:0}
.prose{min-width:0;overflow-wrap:break-word}
.prose p,.prose ol,.prose ul,.prose pre,.prose blockquote,.prose table{margin-block:20px}
.prose h2{margin-top:48px;margin-bottom:24px}
.prose h3{margin-top:32px;margin-bottom:16px}
.prose ul{list-style:disc;padding-left:24px}
.prose ol{padding-left:24px}
.prose a:not(.btn){color:var(--accent-dark);text-decoration:underline;text-underline-offset:4px}
.prose section{min-width:0}
.prose code{background:var(--bg-panel-2);border-radius:var(--r-xs);padding:2px 5px}
.prose pre code{padding:0;background:var(--clear)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;height:56px;padding-inline:28px;border:0;border-radius:var(--r-pill);font-size:17px;font-weight:700;line-height:1.3;flex-shrink:0;white-space:nowrap;max-width:100%;transition:transform var(--ease),box-shadow var(--ease)}
.btn svg{width:18px;height:18px}
.btn-solid,.btn-primary{color:var(--white);background:linear-gradient(180deg,var(--accent) 0%,var(--accent) 58%,var(--accent-dark) 140%);box-shadow:inset 0 1px 0 var(--hl-dark),0 18px 32px -14px var(--tint-40)}
.btn-solid:hover,.btn-primary:hover{transform:translateY(-2px);box-shadow:inset 0 1px 0 var(--hl-dark),0 22px 38px -14px var(--tint-40)}
.btn-ghost,.btn-secondary{color:var(--text);background:var(--white);box-shadow:inset 0 0 0 1px var(--border-strong),0 10px 22px -16px var(--ink-30)}
.btn-ghost:hover,.btn-secondary:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--bg-panel-2);color:var(--text-muted);box-shadow:none;cursor:not-allowed;transform:none}
.btn-small{height:44px;padding-inline:20px;font-size:var(--fs-small)}
.ctas{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.tag,.badge{display:inline-flex;align-items:center;gap:10px;max-width:100%;padding:7px 12px;border-radius:var(--r-pill);background:var(--bg-panel);box-shadow:inset 0 1px 0 var(--hl),0 0 0 1px var(--border),0 8px 20px -12px var(--tint-30);font-size:13px;font-weight:600;color:var(--text-muted);overflow-wrap:anywhere}
.tag-dot,.dot-ok{display:inline-block;flex-shrink:0;width:9px;height:9px;border-radius:var(--r-circle);background:var(--success);box-shadow:0 0 0 4px var(--ok-ring)}
.badge-accent{background:var(--teal-mist);color:var(--accent-dark)}
.badge-warm{background:var(--apricot-soft);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{position:relative;display:block;min-height:120px;min-width:0;max-width:100%;overflow:hidden;margin-block:24px}
#server-status+*{margin-top:32px}
#server-status>*{min-width:0;max-width:100%}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.fl-red{fill:var(--flag-red)}.fl-white{fill:var(--flag-white)}.fl-blue{fill:var(--flag-blue)}.fl-green{fill:var(--flag-green)}
.st-white{stop-color:var(--white)}.st-panel{stop-color:var(--bg-panel)}.st-panel2{stop-color:var(--bg-panel-2)}
.st-accent{stop-color:var(--accent)}.st-accentdk{stop-color:var(--accent-dark)}
.st-tealsoft{stop-color:var(--teal-soft)}.st-peri{stop-color:var(--peri)}.st-perisoft{stop-color:var(--peri-soft)}
.mk-stroke{stroke:var(--white)}
.sky{position:relative;overflow-x:clip;max-width:100%;isolation:isolate;background:linear-gradient(180deg,var(--paper-top) 0%,var(--bg) 46%,var(--paper-bottom) 100%)}
.atmos{position:absolute;inset:0;overflow:hidden;z-index:-1;pointer-events:none}
.blob{position:absolute;border-radius:var(--r-circle);filter:blur(24px)}
.blob-peach{inset:-22% 56% 34% -12%;background:radial-gradient(closest-side,var(--blob-peach),var(--clear))}
.blob-cyan{inset:38% -10% -28% 50%;background:radial-gradient(closest-side,var(--blob-cyan),var(--clear))}
.grain{position:absolute;inset:0;background-image:radial-gradient(var(--grain) .7px,var(--clear) 1.1px),radial-gradient(var(--grain) .7px,var(--clear) 1.1px);background-size:3px 3px,5px 5px;background-position:0 0,1px 2px}
.spark{position:absolute;width:12px;height:12px;background:linear-gradient(var(--star),var(--star)) center/100% 2px no-repeat,linear-gradient(var(--star),var(--star)) center/2px 100% no-repeat}
.spark.lg{width:18px;height:18px}.spark.sm{width:8px;height:8px}
.s1{top:15%;left:5%}.s2{top:24%;left:42%}.s3{top:9%;left:62%}.s4{top:33%;left:94%}
.s5{top:57%;left:2.5%}.s6{top:72%;left:38%}.s7{top:88%;left:56%}.s8{top:47%;left:48%}
.s9{top:16%;left:85%}.s10{top:90%;left:20%}.s11{top:64%;left:97%}.s12{top:41%;left:30%}
#site-header{position:relative;z-index:50;min-height:var(--header-height)}
.nav{position:relative;z-index:50}
.nav-in{max-width:var(--wrap);margin:0 auto;padding-inline:var(--gutter);height:var(--header-height);display:flex;align-items:center;gap:24px;flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;min-height:44px}
.brand-mark{display:block;width:34px;height:34px;filter:drop-shadow(0 6px 12px var(--tint-20))}
.brand-en{font-family:var(--font-display);font-weight:900;font-size:21px;letter-spacing:-.03em;line-height:1}
.brand-zh{font-size:13px;font-weight:500;color:var(--text-muted);padding-left:10px;border-left:1px solid var(--border)}
.menu{margin-left:auto;flex:1;min-width:0}
.menu ul{display:flex;align-items:center;justify-content:flex-end;list-style:none;margin:0;padding:0;gap:2px}
.menu li{min-width:0}
.menu a{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:38px;padding-inline:12px;border-radius:var(--r-pill);font-size:var(--fs-small);font-weight:600;color:var(--text-muted);white-space:nowrap;transition:background-color var(--ease),color var(--ease)}
.menu a svg{width:16px;height:16px}
.menu a:hover{color:var(--text);background:var(--hl-soft)}
.menu a.is-active{color:var(--text);background:var(--bg-panel);box-shadow:inset 0 1px 0 var(--hl),0 0 0 1px var(--border),0 8px 18px -10px var(--tint-30)}
.nav-end{display:flex;align-items:center;gap:8px;margin-left:12px;flex-shrink:0}
.lang-box{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:38px;min-width:44px;width:auto;padding:0 12px;border:0;border-radius:var(--r-pill);background:var(--clear);font-size:var(--fs-small);font-weight:600;color:var(--text-muted);white-space:nowrap}
.lang span{white-space:nowrap}
.lang svg{width:16px;height:16px}
.lang:hover{background:var(--hl-soft);color:var(--text)}
.lang-panel{position:absolute;top:calc(100% + 10px);right:0;z-index:80;min-width:180px;padding:8px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--shadow-panel)}
.lang-panel a{display:flex;align-items:center;width:100%;min-height:44px;padding:8px 14px;border-radius:var(--r-sm);font-size:var(--fs-small)}
.lang-panel a:hover,.lang-panel a[aria-current]{background:var(--bg-panel-2)}
.login{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding-inline:22px;border-radius:var(--r-pill);background:var(--text);color:var(--bg-panel);font-size:var(--fs-small);font-weight:700;white-space:nowrap;box-shadow:inset 0 1px 0 var(--hl-dark),0 10px 20px -10px var(--ink-30);transition:transform var(--ease)}
.login:hover{transform:translateY(-1px)}
.burger{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;border-radius:var(--r-sm);background:var(--bg-panel);color:var(--text)}
.burger svg{width:22px;height:22px}
.nav-drawer{position:fixed;top:var(--header-height);inset-inline:0;height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain;z-index:60;padding:20px var(--gutter) 40px;background:var(--bg-panel)}
.nav-drawer a{display:flex;align-items:center;gap:12px;width:100%;min-height:48px;padding:12px 16px;border-radius:var(--r-sm);font-weight:600}
.nav-drawer a:hover,.nav-drawer a.is-active{background:var(--bg-panel-2);color:var(--accent-dark)}
.drawer-languages{border-top:1px solid var(--border);padding-top:16px;margin-top:16px}
.nav-veil{position:fixed;top:var(--header-height);bottom:0;inset-inline:0;z-index:55;background:var(--ink-30)}
html.nav-open{overflow:hidden}
.site-footer{background:var(--bg-panel-2);border-top:1px solid var(--border);padding-top:56px;padding-bottom:28px}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:48px}
.footer-brand p{max-width:32em;margin-top:20px;color:var(--text-muted)}
.footer-title{font-size:var(--fs-small);font-weight:800;margin-bottom:16px}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 20px}
.footer-links a{display:inline-flex;align-items:center;min-height:30px;font-size:var(--fs-small);color:var(--text-muted)}
.footer-links a:hover{color:var(--accent-dark);text-decoration:underline}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;margin-top:40px;padding-top:24px;border-top:1px solid var(--border);font-size:var(--fs-caption);color:var(--text-muted)}
.footer-languages{margin-top:24px}
@media(min-width:1101px) and (max-width:1279px){
  .nav-in{gap:14px}.menu a{padding-inline:8px;font-size:13px}.nav-end{gap:4px;margin-left:0}.lang{padding-inline:8px}
}
@media(max-width:1100px){
  .menu{display:none}.nav-end{margin-left:auto}.burger{display:inline-flex}
  .footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}
}
@media(max-width:768px){
  :root{--gutter:24px;--fs-h1:clamp(28px,6vw,40px);--header-height:68px}
  .sec{padding-top:48px;padding-bottom:48px}
  .grid-three{grid-template-columns:1fr}.grid-five{grid-template-columns:repeat(2,minmax(0,1fr))}
  .nav-in{gap:12px}.nav-end{gap:4px;margin-left:auto}.lang{font-size:12px;padding-inline:8px}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .no-break{white-space:normal}
  .tilt{transform:none}
  .atmos{max-width:100%}
  .nav-in{gap:8px}.brand{gap:6px}.brand-mark{width:28px;height:28px}.brand-en{font-size:18px}
  .brand-zh{font-size:11px}.login{min-height:38px;padding-inline:14px;font-size:12px}
  .lang{padding-inline:6px;font-size:11px;gap:3px}.lang svg{display:none}
  .footer-grid{grid-template-columns:1fr;gap:32px}.footer-brand{grid-column:auto}
  .panel,.card{padding:22px}.btn{padding-inline:22px;font-size:var(--fs-body)}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}