:root{
  --bg:#E6F0F4;
  --bg-panel:#F7FBFC;
  --bg-panel2:#D8E7EE;
  --border:#C6D8E1;
  --accent:#127A49;
  --accent-dark:#0B5A35;
  --accent-2:#1E9E8A;
  --text:#14212A;
  --text-muted:#4D6170;
  --text-soft:#6B7F8D;
  --success:#1C8F55;
  --warn:#B4761C;
  --error:#C2413A;
  --white:#FFFFFF;
  --hero-top:#EEF6F8;
  --hero-bottom:#DFEBF0;
  --side:#EEF5F8;
  --line:#A9C1CC;
  --glow-mint:rgba(150,224,196,.62);
  --glow-sky:rgba(168,212,238,.60);
  --accent-a06:rgba(18,122,73,.06);
  --accent-a08:rgba(18,122,73,.08);
  --accent-a10:rgba(18,122,73,.10);
  --accent-a14:rgba(18,122,73,.14);
  --accent-a24:rgba(18,122,73,.24);
  --success-a12:rgba(28,143,85,.12);
  --hi:rgba(255,255,255,.85);
  --hi-soft:rgba(255,255,255,.58);
  --white-a24:rgba(255,255,255,.24);
  --edge-dark:rgba(20,33,42,.14);
  --veil:rgba(20,33,42,.30);
  --flag-red:#D7262E;
  --flag-navy:#2C3A70;
  --flag-white:#FFFFFF;
  --flag-black:#1C1C1C;
  --flag-gold:#F2C318;
  --flag-green:#159150;
  --clear:transparent;
  --shadow-float:0 44px 88px -30px var(--accent-a14),0 18px 36px -18px var(--accent-a10);
  --shadow-card:0 18px 40px -18px var(--accent-a14),0 4px 12px -6px var(--accent-a08);
  --font-display:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --r-xs:3px;
  --r-sm:8px;
  --r-md:10px;
  --r-lg:12px;
  --r-pill:999px;
  --r-round:50%;
  --nav-h:72px;
  --gutter:40px;
  --content-width:1360px;
  --reading-width:820px;
  --space-section:80px;
  --toc-offset:16px;
  --anchor-offset:96px;
  --ease-out:cubic-bezier(.2,.7,.3,1);
  --duration-fast:.15s;
  --duration-reveal:.35s;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--nav-h) + 16px);scroll-behavior:smooth}
body{margin:0;position:relative;background:var(--bg);color:var(--text);font-family:var(--font-body);line-height:1.5;-webkit-font-smoothing:antialiased}
[hidden]{display:none!important}
img{display:block;max-width:100%;height:auto}
svg{flex-shrink:0;vertical-align:middle}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
a{color:inherit;text-underline-offset:.2em}
a,button,summary,input,select,textarea,[tabindex]{-webkit-tap-highlight-color:var(--accent-a14)}
:where(a,button,summary,input,select,textarea,[tabindex]):focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:var(--r-sm)}
h1,h2,h3{font-family:var(--font-display);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:clamp(52px,4.6vw,66px);font-weight:800;line-height:1.1;letter-spacing:-.02em}
h2{font-size:34px;line-height:1.2;letter-spacing:-.02em;font-weight:800}
h3{font-size:21px;line-height:1.4}
p{overflow-wrap:break-word}
code{font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--bg-panel2);border:1px solid var(--border);border-radius:var(--r-md)}
pre code{white-space:pre;overflow-wrap:normal}
hr{border:0;border-top:1px solid var(--border);margin-block:32px}
.wrap{width:100%;max-width:var(--content-width);margin-inline:auto;padding-inline:var(--gutter)}
.reading-wrap{width:100%;max-width:var(--reading-width);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--space-section);padding-bottom:var(--space-section)}
.page-head{padding-top:56px;padding-bottom:40px}
.page-head h1{margin:0}
.page-head 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}
.hl{color:var(--accent);background:linear-gradient(180deg,var(--clear) 72%,var(--accent-a14) 72%,var(--accent-a14) 92%,var(--clear) 92%)}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.skip{position:absolute;left:12px;top:-80px;z-index:100;padding:8px 14px;min-height:32px;background:var(--text);color:var(--white);border-radius:var(--r-sm);text-decoration:none;font-size:14px}
.skip:focus{top:12px}
.grid{display:grid;gap:20px}
.grid>*,:where(.hero-grid,.cards,.pricing-grid,.platform-grid,.footer-grid,.inspect)>*{min-width:0}
.panel{padding:28px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:inset 0 0 0 1px var(--hi),var(--shadow-card)}
.panel-inset{padding:20px;border-radius:var(--r-md);background:var(--bg-panel2);border:1px solid var(--border)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:12px 24px;border:1px solid var(--clear);border-radius:var(--r-md);font-size:16px;font-weight:700;text-decoration:none;white-space:nowrap;flex-shrink:0;transition:transform var(--duration-fast) ease,box-shadow var(--duration-fast) ease}
.btn svg{display:block;flex:none}
.btn-primary{color:var(--white);background:linear-gradient(135deg,var(--accent) 0%,var(--accent) 42%,var(--accent-2) 100%);box-shadow:inset 0 1px 0 var(--white-a24),0 14px 26px -12px var(--accent-a24)}
.btn-primary:hover{transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);background:var(--accent-dark)}
.btn-ghost,.btn-secondary{color:var(--text);background:var(--bg-panel);border-color:var(--border);box-shadow:inset 0 1px 0 var(--hi)}
.btn-ghost:hover,.btn-secondary:hover{border-color:var(--accent);color:var(--accent-dark)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--bg-panel2);color:var(--text-muted);border-color:var(--border);box-shadow:none;transform:none}
.btn-small{min-height:40px;font-size:14px;padding:8px 16px}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.site-head{position:relative;z-index:40;background:var(--hero-top)}
.site-head .wrap{display:flex;align-items:center;gap:28px;height:var(--nav-h);flex-wrap:nowrap}
body:has(.hero) .site-head{position:absolute;inset:0 0 auto;background:var(--clear)}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-family:var(--font-display);font-weight:800;font-size:20px;letter-spacing:-.02em;flex:none}
.brand img{width:34px;height:34px;flex:none}
.brand-zh{font-size:.85em;font-weight:500;color:var(--text-muted)}
.nav{flex:1;display:flex;justify-content:center;min-width:0}
.nav-list{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:0}
.nav-list li{display:flex;align-items:center}
.nav-list li+li::before{content:"·";color:var(--text-soft);padding-inline:10px;font-weight:700}
.nav-list a{text-decoration:none;color:var(--text-muted);font-size:14.5px;font-weight:500;white-space:nowrap;padding:6px 2px;min-height:32px;display:inline-flex;align-items:center}
.nav-list a:hover{color:var(--accent)}
.nav-list a[aria-current="page"]{color:var(--text);font-weight:700;box-shadow:inset 0 -2px 0 var(--accent)}
.head-actions{display:flex;align-items:center;gap:14px;flex:none}
.login{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:38px;padding:8px 16px;border-radius:var(--r-md);background:var(--bg-panel);border:1px solid var(--border);color:var(--text);font-size:14px;font-weight:700;text-decoration:none;white-space:nowrap;box-shadow:inset 0 1px 0 var(--hi),0 6px 14px -10px var(--accent-a24)}
.login:hover{border-color:var(--accent);color:var(--accent-dark)}
.language{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:5px;width:auto;min-width:44px;min-height:38px;appearance:none;border:0;background:none;font:inherit;font-size:14px;color:var(--text-muted);cursor:pointer;padding:6px 4px;white-space:nowrap}
.lang-panel{position:absolute;right:0;top:calc(100% + 10px);z-index:60;min-width:180px;padding:6px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--shadow-card)}
.lang-panel a{display:flex;align-items:center;min-height:44px;padding:10px 14px;text-decoration:none;border-radius:var(--r-sm);font-size:14px}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--accent-a08);color:var(--accent-dark)}
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:4px;min-width:44px;min-height:44px;border:1px solid var(--border);background:var(--bg-panel);border-radius:var(--r-sm);color:var(--text)}
.menu-line{display:block;width:20px;height:2px;background:currentColor}
.mobile-drawer{display:none}
.nav-veil{display:none}
html.nav-open{overflow:hidden}
.site-footer{padding-top:56px;padding-bottom:32px;border-top:1px solid var(--border);background:linear-gradient(180deg,var(--side),var(--bg-panel2))}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:48px}
.footer-brand p{max-width:340px;font-size:14px;color:var(--text-muted);line-height:1.8}
.footer-heading{font-size:14px;font-weight:700;margin:0 0 12px}
.footer-links{display:flex;flex-wrap:wrap;gap:6px 18px;list-style:none;margin:0;padding:0}
.footer-links a{display:inline-flex;align-items:center;min-height:32px;font-size:14px;text-decoration:none;color:var(--text-muted)}
.footer-links a:hover{color:var(--accent-dark);text-decoration:underline}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:32px}
.footer-languages a{display:inline-flex;align-items:center;min-height:32px;font-size:13px;color:var(--text-muted)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-top:24px;padding-top:24px;border-top:1px solid var(--border);font-size:13px;color:var(--text-muted)}
.footer-legal{display:flex;gap:18px}
.footer-legal a{display:inline-flex;align-items:center;min-height:28px}
.reveal{transition:opacity var(--duration-reveal) var(--ease-out),transform var(--duration-reveal) var(--ease-out)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:relative;display:block;min-width:0;max-width:100%;overflow:hidden;margin-top:24px;margin-bottom:32px}
#server-status+*{margin-top:32px}
.prose{font-size:16px;line-height:1.85;min-width:0}
.prose h2{margin-top:48px}
.prose h3{margin-top:32px}
.prose a{color:var(--accent-dark)}
.prose li+li{margin-top:8px}
.prose img{border-radius:var(--r-md)}
.decoration-region{position:relative;overflow-x:clip}
@media(max-width:1240px){
  .nav-list a{font-size:13.5px}
  .nav-list li+li::before{padding-inline:7px}
  .site-head .wrap{gap:20px}
}
@media(max-width:1100px){
  .nav{display:none}
  .head-actions{margin-left:auto;gap:10px}
  .menu-toggle{display:inline-flex}
  .mobile-drawer{display:block;position:fixed;top:var(--nav-h);left:0;right:0;z-index:39;height:calc(100dvh - var(--nav-h));max-height:calc(100dvh - var(--nav-h));overflow-y:auto;overscroll-behavior:contain;background:var(--bg-panel);padding:16px var(--gutter) 32px;border-top:1px solid var(--border)}
  .mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px 16px;color:var(--text);text-decoration:none;border-radius:var(--r-sm)}
  .mobile-drawer a:hover,.mobile-drawer a[aria-current]{background:var(--accent-a08);color:var(--accent-dark)}
  .mobile-drawer ul{list-style:none;margin:0;padding:0}
  .drawer-languages{margin-top:20px;padding-top:16px;border-top:1px solid var(--border)}
  .nav-veil{display:block;position:fixed;inset:var(--nav-h) 0 0;z-index:38;border:0;background:var(--veil)}
  .footer-grid{gap:28px}
}
@media(max-width:768px){
  h1{font-size:38px}
  h2{font-size:28px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
}
@media(max-width:640px){
  :root{--gutter:16px;--space-section:56px;--nav-h:72px}
  .no-break{white-space:normal}
  .wrap,.reading-wrap{padding-inline:var(--gutter)}
  .site-head .wrap{gap:8px}
  .brand{gap:6px;font-size:17px}
  .brand img{width:28px;height:28px}
  .head-actions{gap:5px;margin-left:auto}
  .login{padding:7px 10px;font-size:13px}
  .lang{font-size:12px;padding-inline:2px}
  .panel{padding:20px}
  .page-head{padding-top:40px;padding-bottom:28px}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
  .tilt,.decorative-tilt{transform:none}
  .decoration-region{max-width:100%}
  .cta-row .btn{flex:1 1 auto;min-height:48px;padding:10px 18px}
}
@media(max-width:359px){
  .brand{font-size:15px;gap:4px}
  .brand img{width:25px;height:25px}
  .head-actions{gap:3px}
  .login{padding-inline:8px}
  .lang{font-size:11px;gap:2px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}