:root{
  color-scheme:light;
  --bg:#F9FAF8;
  --bg-panel:#FFFFFF;
  --bg-panel2:#EFF1EE;
  --border:#DDE2DD;
  --border-strong:#C8D0CA;
  --accent:#F4BE1B;
  --accent-dark:#8F6A00;
  --text:#13231F;
  --text-2:#2F403B;
  --text-muted:#5C6B78;
  --success:#1F9A5B;
  --warn:#C97A1E;
  --error:#CF3B3B;
  --violet:#7B5CE6;
  --rose:#E0559A;
  --route-mid:#AE58C0;
  --brand-2:#2E5C4F;
  --win-top:#1A2522;
  --win-0:#121A18;
  --win-1:#151F1C;
  --win-2:#1B2623;
  --win-3:#25322E;
  --win-line:#28342F;
  --win-line-2:#34423D;
  --win-text:#ECF1EE;
  --win-muted:#8E9C97;
  --win-dim:#66756F;
  --win-hi:rgba(255,255,255,.07);
  --win-sheen:rgba(255,255,255,.05);
  --win-sheen-0:rgba(255,255,255,0);
  --win-edge:rgba(255,255,255,.38);
  --win-ring:rgba(19,35,31,.55);
  --signal-wash:rgba(244,190,27,.07);
  --signal-wash-0:rgba(244,190,27,0);
  --glow-signal:rgba(244,190,27,.08);
  --glow-signal-0:rgba(244,190,27,0);
  --accent-shadow:rgba(143,106,0,.30);
  --accent-edge:rgba(143,106,0,.22);
  --shadow-ink:rgba(19,35,31,.18);
  --shadow-ink-soft:rgba(19,35,31,.07);
  --shadow-ink-strong:rgba(19,35,31,.28);
  --shadow-deep:rgba(0,0,0,.42);
  --ink-hi:rgba(255,255,255,.14);
  --ring-y:rgba(244,190,27,.20);
  --ring-g:rgba(31,154,91,.24);
  --ring-r:rgba(224,85,154,.24);
  --ring-v:rgba(123,92,230,.26);
  --flag-red:#D7263D;
  --flag-blue:#1F3A8A;
  --flag-white:#FFFFFF;
  --flag-edge:rgba(19,35,31,.16);
  --clear:transparent;
  --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,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --weight-body:400;
  --weight-medium:550;
  --weight-strong:700;
  --weight-heading:800;
  --weight-display:900;
  --size-body:16px;
  --size-small:14px;
  --size-caption:12px;
  --size-section:clamp(28px,3.5vw,40px);
  --size-display:clamp(52px,5vw,64px);
  --r-xs:6px;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:14px;
  --r-win:18px;
  --r-pill:999px;
  --r-round:50%;
  --r-flag:3px;
  --r-device-icon:10px;
  --wrap:1264px;
  --reading:820px;
  --gutter:32px;
  --header-height:68px;
  --anchor-offset:88px;
  --toc-offset:88px;
  --toc-landing:164px;
  --section-space:88px;
  --ease:cubic-bezier(.2,.65,.3,1);
  --time-fast:150ms;
  --time-reveal:600ms;
  --shadow-panel:0 2px 6px var(--shadow-ink-soft),0 20px 44px -16px var(--shadow-ink);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:var(--anchor-offset);scroll-behavior:smooth}
html.nav-open{overflow:hidden}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);font-weight:var(--weight-body);font-size:var(--size-body);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button,a{-webkit-tap-highlight-color:var(--clear)}
button:disabled,.btn[aria-disabled="true"]{cursor:not-allowed}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--accent-dark);outline-offset:4px}
img,video{display:block;max-width:100%;height:auto}
svg{flex-shrink:0}
p{margin:0}
ul{list-style:none;margin:0;padding:0}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:var(--weight-heading);color:var(--text);text-wrap:balance;overflow-wrap:break-word}
h1{margin:0;font-size:var(--size-display);line-height:1.12;letter-spacing:-.02em;font-weight:var(--weight-display)}
h2{margin:0 0 24px;font-size:var(--size-section);line-height:1.25;letter-spacing:-.02em}
h3{margin:0 0 16px;font-size:22px;line-height:1.35;letter-spacing:-.01em}
h4{font-size:18px;line-height:1.4}
code,kbd,pre{font-family:var(--font-mono)}
code{overflow-wrap:anywhere;font-size:.9em}
pre{max-width:100%;overflow-x:auto;padding:20px;border-radius:var(--r-sm);background:var(--bg-panel2);border:1px solid var(--border)}
pre code{white-space:pre;overflow-wrap:normal}
table{border-collapse:collapse}
th,td{text-align:left}
[hidden]{display:none!important}
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.reading-wrap{width:100%;max-width:var(--reading);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--section-space);padding-bottom:var(--section-space)}
.section-heading{margin-bottom:32px}
.section-heading p{max-width:720px;color:var(--text-muted);font-size:18px}
.no-break{white-space:nowrap}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.kicker{font-size:var(--size-caption);font-family:var(--font-mono);color:var(--text-muted);letter-spacing:.06em;margin-bottom:12px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
:where(.grid,.card-grid,.platform-grid,.pricing-grid,.footer-grid)>*{min-width:0}
.grid{display:grid;gap:24px}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card,.panel{min-width:0;padding:28px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:inset 0 1px 0 var(--bg-panel),var(--shadow-panel)}
.panel-soft{background:var(--bg-panel2);box-shadow:none}
.panel-dark{background:linear-gradient(180deg,var(--win-top),var(--win-0));color:var(--win-text);border-color:var(--win-line);box-shadow:inset 0 1px 0 var(--win-hi),var(--shadow-panel)}
.panel-dark :where(h2,h3){color:var(--win-text)}
.decorated-section,.tilt-stage{position:relative;overflow-x:clip;max-width:100%}
#server-status{position:relative;display:block;min-width:0;max-width:100%;overflow:hidden;margin-block:24px 32px}
#server-status+*{margin-top:32px}
#server-status :where(.server-grid,.servers-grid){display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:16px;min-width:0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:10px 26px;border:1px solid var(--clear);border-radius:var(--r-sm);font-size:16px;font-weight:var(--weight-strong);line-height:1.5;text-align:center;flex-shrink:0;white-space:nowrap;transition:transform var(--time-fast) var(--ease),background var(--time-fast)}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--text);color:var(--bg-panel);box-shadow:inset 0 1px 0 var(--ink-hi),0 12px 26px -14px var(--shadow-ink-strong)}
.btn-ghost,.btn-secondary{background:var(--bg-panel);color:var(--text);border-color:var(--border-strong)}
.btn-ghost:hover,.btn-secondary:hover{background:var(--bg-panel2)}
.btn-small{min-height:40px;padding:8px 18px;font-size:14px}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--bg-panel2);color:var(--text-muted);border-color:var(--border);box-shadow:none;transform:none}
.btn svg{width:18px;height:18px}
.text-link{display:inline-flex;align-items:center;gap:8px;min-height:24px;color:var(--text-muted);font-weight:var(--weight-strong)}
.text-link:hover{color:var(--text)}
.topbar{position:relative;z-index:50}
.topbar-in{position:relative;display:flex;align-items:center;min-height:var(--header-height)}
.brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:var(--weight-heading);font-size:19px;letter-spacing:-.02em;color:var(--text);flex-shrink:0;min-height:38px}
.brand-mark{width:28px;height:28px;object-fit:contain;flex-shrink:0}
.brand-zh{font-size:16px;font-weight:var(--weight-medium);color:var(--text-muted)}
.mainnav{margin-left:36px;min-width:0}
.mainnav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px}
.mainnav a{display:block;padding:7px 14px;border-radius:var(--r-pill);border:1px solid var(--clear);font-size:14.5px;font-weight:500;line-height:20px;color:var(--text-muted);white-space:nowrap;transition:color var(--time-fast)}
.mainnav a:hover{color:var(--text)}
.mainnav a.is-active{color:var(--text);font-weight:650;background:var(--bg-panel);border-color:var(--border);box-shadow:0 1px 2px var(--shadow-ink-soft)}
.topbar-end{margin-left:auto;display:flex;align-items:center;gap:10px;flex-shrink:0}
.language-picker{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;min-height:38px;width:auto;padding:0 12px;border:0;border-radius:var(--r-sm);background:var(--clear);font-size:14px;color:var(--text-muted);white-space:nowrap}
.lang span{white-space:nowrap}
.lang:hover{color:var(--text)}
.language-menu{position:absolute;right:0;top:calc(100% + 8px);width:180px;padding:6px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--shadow-panel);z-index:60}
.language-menu a{display:flex;align-items:center;min-height:44px;padding:10px 12px;border-radius:var(--r-xs);font-size:14px}
.language-menu a:hover,.language-menu a[aria-current="true"]{background:var(--bg-panel2)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:0 18px;border-radius:var(--r-sm);background:var(--text);color:var(--bg-panel);font-size:14px;font-weight:650;white-space:nowrap;box-shadow:inset 0 1px 0 var(--ink-hi),0 6px 14px -8px var(--shadow-ink-strong)}
.menu-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--bg-panel)}
.menu-toggle svg{width:20px;height:20px}
.mobile-drawer{position:absolute;z-index:55;top:100%;left:var(--gutter);right:var(--gutter);padding:12px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-md);max-height:calc(100dvh - var(--header-height) - 16px);overflow-y:auto;overscroll-behavior:contain;box-shadow:var(--shadow-panel)}
.mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px 16px;border-radius:var(--r-xs)}
.mobile-drawer a.is-active,.mobile-drawer a[aria-current="true"]{background:var(--bg-panel2);font-weight:var(--weight-strong)}
.drawer-languages{margin-top:12px;padding-top:12px;border-top:1px solid var(--border)}
.nav-veil{position:fixed;inset:var(--header-height) 0 0;z-index:40;background:var(--shadow-ink-strong);border:0;width:100%}
.site-footer{border-top:1px solid var(--border);background:var(--bg-panel2);padding-top:56px;padding-bottom:32px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{max-width:320px;margin-top:18px;color:var(--text-muted);font-size:14px;line-height:1.8}
.footer-title{font-size:14px;font-weight:var(--weight-strong);margin-bottom:14px}
.footer-links{display:grid;gap:4px}
.footer-links a{display:inline-flex;align-items:center;min-height:32px;font-size:14px;color:var(--text-muted)}
.footer-links a:hover{color:var(--text)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;margin-top:40px;padding-top:24px;border-top:1px solid var(--border);font-size:12px;color:var(--text-muted)}
.legal-links{display:flex;flex-wrap:wrap;gap:20px}
.legal-links a{display:inline-flex;align-items:center;min-height:24px}
.prose{min-width:0;font-size:17px;line-height:1.85;overflow-wrap:break-word}
.prose :where(p,ul,ol,blockquote,pre,table){margin-block:0 24px}
.prose :where(ul,ol){padding-left:1.5em}
.prose ul{list-style:disc}
.prose h2{margin-top:56px}
.prose h3{margin-top:32px}
.prose a:not(.btn){text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px}
.prose code{background:var(--bg-panel2);border-radius:var(--r-xs);padding:2px 5px}
.prose pre code{padding:0;background:var(--clear)}
.prose img{border-radius:var(--r-md)}
.reveal{transition:opacity var(--time-reveal) var(--ease),transform var(--time-reveal) var(--ease)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
@media(max-width:1180px){
  .mainnav{margin-left:20px}
  .mainnav a{padding-inline:10px}
  .topbar-end{gap:6px}
}
@media(max-width:1050px){
  .mainnav{display:none}
  .menu-toggle{display:inline-flex}
  .topbar-end{margin-left:auto}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(min-width:1051px){.mobile-drawer,.nav-veil{display:none!important}}
@media(max-width:768px){
  :root{--gutter:16px;--section-space:64px;--size-display:38px}
  h1{font-size:38px;line-height:1.14}
  .card-grid{grid-template-columns:1fr}
  .card,.panel{padding:22px}
  .footer-grid{gap:28px}
  .section-heading p{font-size:16px}
  .prose{font-size:16px}
}
@media(max-width:640px){
  .no-break{white-space:normal}
  .tilt,.is-tilted,[data-tilt]{transform:none}
  .decorated-section,.tilt-stage{max-width:100%;overflow-x:clip}
  .topbar-end{gap:4px;margin-left:auto}
  .topbar-end .lang{padding:0 8px}
  .btn-login{padding-inline:13px}
  .brand{font-size:17px;gap:7px}
  .brand-mark{width:25px;height:25px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{align-items:flex-start;flex-direction:column}
  .btn{max-width:100%}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none}
}