:root{
  color-scheme:light;
  --bg:#F6F9F8;--bg-panel:#FFFFFF;--bg-panel2:#EDF2F0;--bg-sunk:#F4F8F6;
  --border:#DCE4E1;--border-soft:#E6ECE9;
  --accent:#22884C;--accent-dark:#176A39;--accent-soft:#4CAF78;
  --text:#1B2420;--text-muted:#5E6B66;--text-faint:#8A9792;
  --success:#2A9D63;--warn:#C68A14;--error:#C8443A;
  --success-halo:rgba(42,157,99,.18);--mint-edge:#B7DED0;
  --hero-top:#FAFCFB;--hero-bottom:#EEF3F1;
  --glow-mint:rgba(76,190,132,.08);--glow-cyan:rgba(84,188,200,.07);--glow-stage:rgba(76,190,150,.12);
  --shadow-ink:rgba(27,36,32,.06);--shadow-10:rgba(34,136,76,.10);--shadow-14:rgba(34,136,76,.14);--shadow-24:rgba(34,136,76,.24);--shadow-knob:rgba(15,60,34,.28);
  --on-accent:#FFFFFF;--on-accent-soft:rgba(255,255,255,.82);--on-accent-line:rgba(255,255,255,.26);--on-accent-edge:rgba(255,255,255,.14);--on-accent-glow:rgba(255,255,255,.18);
  --hi:rgba(255,255,255,.95);--veil:rgba(255,255,255,.62);--scrim:rgba(27,36,32,.24);--clear:transparent;
  --flag-red:#CC3B3B;--flag-blue:#2E4787;--flag-white:#FFFFFF;--flag-green:#1E8A4F;--flag-edge:rgba(27,36,32,.14);
  --r-xs:8px;--r-sm:10px;--r-md:12px;--r-lg:14px;--r-pill:999px;--r-round:50%;
  --font-display:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --weight-body:400;--weight-medium:500;--weight-semibold:600;--weight-bold:700;--weight-display:800;
  --size-body:16px;--size-small:14px;--size-h1:clamp(52px,4.45vw,64px);--size-h2:40px;--size-h3:22px;
  --gutter:56px;--content-width:1440px;--reading-width:800px;--header-height:72px;--anchor-offset:88px;--toc-offset:152px;
  --space-1:8px;--space-2:16px;--space-3:24px;--space-4:32px;--space-5:40px;--space-6:48px;--space-8:64px;--space-10:80px;
  --shadow-panel:inset 0 1px 0 var(--hi),0 2px 6px var(--shadow-ink),0 18px 40px var(--shadow-10);
  --shadow-float:0 0 0 1px var(--border-soft),inset 0 1px 0 var(--hi),0 4px 10px var(--shadow-ink),0 28px 56px -10px var(--shadow-14);
  --ease-ui:150ms ease;--reveal-duration:350ms;
}
*,*::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:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--size-body);font-weight:var(--weight-body);line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
button{border:0}
img{display:block;max-width:100%;height:auto}
svg{flex-shrink:0}
p,h1,h2,h3,h4,figure{margin:0}
h1,h2,h3{font-family:var(--font-display);text-wrap:balance}
h1{font-size:var(--size-h1);font-weight:var(--weight-display);line-height:1.12;letter-spacing:-.02em}
h2{font-size:var(--size-h2);font-weight:var(--weight-display);line-height:1.25;letter-spacing:-.02em}
h3{font-size:var(--size-h3);font-weight:var(--weight-bold);line-height:1.4}
ul,ol{padding-left:1.5em}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--accent);outline-offset:3px}
[hidden]{display:none!important}
.wrap{width:100%;max-width:var(--content-width);margin-inline:auto;padding-inline:var(--gutter)}
.reading-wrap{width:100%;max-width:calc(var(--reading-width) + var(--gutter)*2);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--space-10);padding-bottom:var(--space-10)}
.section-head{margin-bottom:var(--space-4);max-width:var(--reading-width)}
.section-head p{margin-top:12px;color:var(--text-muted);font-size:18px}
.center-head{text-align:center;margin-inline:auto}
.stack{display:grid;gap:var(--space-3)}
.grid-two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-3)}
.grid-three{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-3)}
:where(.grid-two,.grid-three,.hero-grid,.footer-grid,.feature-detail,.platform-grid,.plan-grid)>*{min-width:0}
.no-break{white-space:nowrap}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono)}
.hl{color:var(--accent)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.skip{position:absolute;left:16px;top:-64px;z-index:100;padding:10px 16px;border-radius:var(--r-sm);background:var(--bg-panel);box-shadow:0 0 0 1px var(--border)}
.skip:focus{top:12px}
.ico{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.icon{width:20px;height:20px}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.btn{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;gap:10px;min-height:54px;padding:12px 28px;border-radius:var(--r-pill);font-size:16px;font-weight:var(--weight-semibold);letter-spacing:.01em;line-height:1.5;white-space:nowrap;transition:transform var(--ease-ui),box-shadow var(--ease-ui),border-color var(--ease-ui)}
.btn svg{width:18px;height:18px}
.btn-primary{color:var(--on-accent);background:linear-gradient(180deg,var(--accent),var(--accent-dark));box-shadow:inset 0 1px 0 var(--on-accent-line),0 12px 24px -10px var(--shadow-24)}
.btn-primary:hover,.btn-primary.is-hover{transform:translateY(-1px);box-shadow:inset 0 1px 0 var(--on-accent-line),0 16px 28px -10px var(--shadow-24)}
.btn-ghost,.btn-secondary{color:var(--text);background:var(--bg-panel);border:1px solid var(--border);box-shadow:0 1px 2px var(--shadow-ink)}
.btn-ghost:hover,.btn-secondary:hover{border-color:var(--text-faint);transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--bg-panel2);color:var(--text-muted);box-shadow:none;transform:none;border:1px solid var(--border)}
.btn-small{min-height:44px;padding:9px 20px;font-size:14px}
.btn.is-focus{outline:2px solid var(--accent);outline-offset:3px}
.cta-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}
.card,.panel{background:var(--bg-panel);border:1px solid var(--border-soft);border-radius:var(--r-lg);box-shadow:var(--shadow-panel);padding:var(--space-3)}
.prose{overflow-wrap:break-word}
.prose p,.prose ul,.prose ol,.prose blockquote,.prose pre,.prose .table-scroll{margin-top:var(--space-3);margin-bottom:var(--space-3)}
.prose h2{margin-top:var(--space-8);margin-bottom:var(--space-3)}
.prose h3{margin-top:var(--space-4);margin-bottom:var(--space-2)}
.prose a{color:var(--accent-dark);text-decoration:underline;text-underline-offset:3px}
code{font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere;background:var(--bg-panel2);border-radius:var(--r-xs);padding:2px 5px}
pre{max-width:100%;overflow-x:auto;padding:20px;border:1px solid var(--border);border-radius:var(--r-md);background:var(--bg-panel2)}
pre code{padding:0;white-space:pre;overflow-wrap:normal}
.reveal{transition:opacity var(--reveal-duration) ease,transform var(--reveal-duration) ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
[data-counter]{display:inline-block;min-width:3ch;font-variant-numeric:tabular-nums;font-family:var(--font-mono)}
#server-status{position:relative;display:block;min-width:0;max-width:100%;min-height:96px;overflow:hidden;margin-top:var(--space-3);margin-bottom:var(--space-4)}
#server-status+*{margin-top:var(--space-4)}
html.nav-open{overflow:hidden}
#site-header,.site-header{position:relative;z-index:40}
.bar{display:flex;align-items:center;flex-wrap:nowrap;height:var(--header-height)}
.brand{display:inline-flex;align-items:center;flex-shrink:0;gap:10px;font-family:var(--font-display);font-size:19px;font-weight:var(--weight-display);letter-spacing:-.02em}
.logo-mark{width:32px;height:32px}
.main-nav{flex:1;min-width:0;margin-left:40px}
.main-nav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px}
.main-nav a{display:inline-flex;align-items:center;gap:6px;min-height:36px;padding:6px 10px;border-radius:var(--r-xs);font-size:14.5px;font-weight:var(--weight-medium);color:var(--text-muted);white-space:nowrap;transition:color var(--ease-ui),background-color var(--ease-ui)}
.main-nav a svg{width:16px;height:16px;color:var(--text-faint)}
.main-nav a:hover{color:var(--text);background:var(--veil)}
.main-nav a.is-active{color:var(--text);background:var(--bg-panel);box-shadow:0 0 0 1px var(--border-soft),0 1px 2px var(--shadow-ink)}
.main-nav a.is-active svg{color:var(--accent)}
.bar-end{margin-left:auto;display:flex;align-items:center;flex-shrink:0;gap:12px}
.bar-divider{width:1px;height:20px;background:var(--border)}
.language-control{position:relative}
.lang,.menu-btn{appearance:none;background:var(--clear);font:inherit;cursor:pointer}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;width:auto;min-width:44px;min-height:36px;padding:6px 10px;border-radius:var(--r-xs);font-size:14px;color:var(--text-muted)}
.lang svg{width:16px;height:16px}
.lang-text{white-space:nowrap}
.lang:hover{background:var(--veil);color:var(--text)}
.caret{font-size:11px;color:var(--text-muted)}
.lang-panel{display:none;position:absolute;right:0;top:calc(100% + 8px);z-index:60;width:184px;padding:6px;border:1px solid var(--border);border-radius:var(--r-md);background:var(--bg-panel);box-shadow:var(--shadow-float)}
.lang-panel.is-open{display:block}
.lang-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:var(--r-xs);font-size:14px}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--bg-panel2);color:var(--accent-dark)}
.login{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;gap:7px;min-height:40px;padding:8px 18px;border:1px solid var(--border);border-radius:var(--r-pill);font-size:14.5px;font-weight:var(--weight-semibold);white-space:nowrap;background:var(--bg-panel);box-shadow:0 1px 2px var(--shadow-ink)}
.login svg{width:16px;height:16px}
.login:hover{border-color:var(--accent);color:var(--accent-dark)}
.menu-btn{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;border-radius:var(--r-sm);background:var(--bg-panel);box-shadow:0 0 0 1px var(--border)}
.menu-btn svg{width:20px;height:20px}
.nav-drawer{display:none;position:fixed;top:var(--header-height);left:0;right:0;height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain;z-index:45;background:var(--bg-panel);padding:16px var(--gutter) 32px}
.nav-drawer ul{list-style:none;margin:0;padding:0}
.nav-drawer a{display:flex;align-items:center;gap:12px;width:100%;min-height:48px;padding:12px;border-radius:var(--r-sm);color:var(--text)}
.nav-drawer a svg{width:18px;height:18px}
.nav-drawer a:hover,.nav-drawer a.is-active{background:var(--bg-panel2);color:var(--accent-dark)}
.drawer-languages{border-top:1px solid var(--border);margin-top:16px;padding-top:16px}
.nav-veil{display:none;position:fixed;inset:var(--header-height) 0 0;z-index:41;background:var(--scrim)}
.site-footer{padding-top:64px;padding-bottom:24px;border-top:1px solid var(--border);background:linear-gradient(180deg,var(--bg-sunk),var(--bg-panel2))}
.footer-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr .8fr;gap:40px}
.footer-brand p{margin-top:16px;max-width:28em;color:var(--text-muted);font-size:14px}
.footer-heading{font-size:14px;font-weight:var(--weight-bold);margin-bottom:16px}
.footer-list{display:grid;gap:6px;list-style:none;margin:0;padding:0}
.footer-list a{display:inline-flex;align-items:center;min-height:28px;font-size:14px;color:var(--text-muted)}
.footer-list a:hover{color:var(--accent-dark);text-decoration:underline;text-underline-offset:3px}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-top:40px;padding-top:24px;border-top:1px solid var(--border);font-size:13px;color:var(--text-muted)}
.footer-legal{display:flex;flex-wrap:wrap;gap:20px}
.footer-legal a{display:inline-flex;align-items:center;min-height:28px}
@media(max-width:1350px){
 .main-nav{margin-left:24px}.main-nav a{gap:5px;padding-inline:8px;font-size:14px}.bar-end{gap:8px}
}
@media(max-width:1200px){
 .main-nav,.bar-divider{display:none}.menu-btn{display:inline-flex}
 .nav-drawer.is-open,.nav-veil.is-open{display:block}
 .bar-end{margin-left:auto}
}
@media(max-width:1080px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:768px){
 :root{--gutter:20px;--size-h1:clamp(30px,8.6vw,38px);--size-h2:28px;--size-h3:20px}
 .section{padding-top:48px;padding-bottom:48px}
 .grid-two,.grid-three{grid-template-columns:minmax(0,1fr)}
 .section-head p{font-size:16px}
}
@media(max-width:640px){
 .no-break{white-space:normal}
 .tilt,[data-tilt]{transform:none!important}
 .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
 .footer-bottom{align-items:flex-start;flex-direction:column}
 .panel,.card{padding:20px}
}
@media(max-width:560px){
 .lang-text,.login svg{display:none}.lang{padding-inline:6px}.login{padding-inline:14px}.bar-end{gap:8px}
}
@media(max-width:360px){
 :root{--gutter:16px}.brand{gap:6px;font-size:17px}.logo-mark{width:28px;height:28px}.bar-end{gap:6px}.login{padding-inline:12px}
}
@media(prefers-reduced-motion:reduce){
 html{scroll-behavior:auto}
 *,*::before,*::after{animation:none!important;transition:none!important}
 .reveal,.reveal.pending{opacity:1;transform:none}
}