:root{
  --bg:#f1f8ff;
  --bg-fade:#f8fbff;
  --bg-panel:#ffffff;
  --bg-panel-2:#e6f0fa;
  --border:#d6e2ee;
  --border-strong:#c3d2e1;
  --accent:#0aa3a8;
  --accent-dark:#067378;
  --accent-tint:#bfeef0;
  --orchid:#b54fd0;
  --orchid-deep:#8a33a3;
  --orchid-light:#d68ae6;
  --orchid-pale:#efd0f6;
  --ember:#ef6a3c;
  --ember-deep:#c04a1f;
  --ember-light:#f59670;
  --ember-pale:#fcc9b1;
  --tint-lagoon:#d3f1f2;
  --tint-orchid:#f6e1f7;
  --tint-ember:#fde4d8;
  --tick:#c9bcf3;
  --text:#0b1220;
  --text-2:#1c2636;
  --ink-hover:#1f2a3c;
  --text-muted:#5b6878;
  --text-soft:#8a96a6;
  --btn-soft:#e1e9f2;
  --btn-soft-hover:#d4dfea;
  --success:#1f9d6a;
  --warn:#c98a0b;
  --error:#d6453b;
  --metal-1:#ffffff;
  --metal-2:#f2f6fa;
  --metal-3:#e1e8f0;
  --metal-4:#cdd8e3;
  --metal-5:#b7c5d3;
  --metal-6:#a2b2c3;
  --bezel:#141c2a;
  --glass-hi:rgba(255,255,255,.8);
  --glass-mid:rgba(255,255,255,.38);
  --grid-line:rgba(255,255,255,.34);
  --lagoon-a12:rgba(10,163,168,.12);
  --lagoon-a30:rgba(10,163,168,.30);
  --lagoon-a55:rgba(10,163,168,.55);
  --lagoon-a70:rgba(10,163,168,.70);
  --orchid-slot:rgba(138,51,163,.5);
  --ink-a04:rgba(11,18,32,.04);
  --ink-a06:rgba(11,18,32,.06);
  --ink-a10:rgba(11,18,32,.10);
  --ink-a14:rgba(11,18,32,.14);
  --ink-a20:rgba(11,18,32,.20);
  --line-construct:rgba(11,18,32,.16);
  --shadow-bar:0 1px 2px var(--ink-a06),0 18px 40px -26px var(--ink-a20);
  --shadow-btn:0 1px 0 var(--ink-a10),0 10px 22px -14px var(--ink-a20);
  --shadow-float:0 2px 3px var(--ink-a04),0 24px 48px -24px var(--ink-a20);
  --font-display:"Inter","Noto Sans SC",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"Inter","Noto Sans SC",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans","Apple SD Gothic Neo",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --r-card:6px;
  --r-btn:4px;
  --r-shot:8px;
  --r-pill:999px;
  --r-circle:50%;
  --r-phone:40px;
  --r-screen:33px;
  --gutter:56px;
  --reading:1120px;
  --wide:1328px;
  --section-space:140px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --fast:200ms;
  --reveal-time:650ms;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:112px}
html.nav-open{overflow:hidden}
body{margin:0;background:var(--bg-panel);color:var(--text);font-family:var(--font-body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
main,section,article,aside,nav,header,footer,div,figure{min-width:0}
img,svg{max-width:100%}
img{vertical-align:middle}
svg{flex-shrink:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;text-wrap:balance}
h1{font-size:clamp(34px,3.4vw,48px);line-height:1.14;letter-spacing:-.02em}
h2{font-size:clamp(26px,2.5vw,34px);line-height:1.25;letter-spacing:-.02em}
h3{font-size:22px;line-height:1.4;letter-spacing:-.01em}
ul,ol{padding-left:1.5em}
button{border:0}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--accent-dark);outline-offset:3px;border-radius:var(--r-btn)}
::selection{background:var(--accent-tint);color:var(--text)}
code,kbd,pre{font-family:var(--font-mono)}
code{overflow-wrap:anywhere;font-size:.88em}
pre{max-width:100%;min-width:0;overflow-x:auto;padding:24px;border:1px solid var(--border);border-radius:var(--r-card);background:var(--bg-fade);color:var(--text-2);line-height:1.85}
pre code{overflow-wrap:normal;word-break:normal;white-space:pre;font-size:13px}
.wrap{width:100%;max-width:calc(var(--reading) + var(--gutter)*2);margin-inline:auto;padding-inline:var(--gutter)}
.wrap-wide{max-width:calc(var(--wide) + var(--gutter)*2)}
.section{padding-top:var(--section-space);padding-bottom:var(--section-space);overflow-x:clip}
.section-blue{background:var(--bg-panel-2);color:var(--text)}
.section-white{background:var(--bg-panel);color:var(--text)}
.section-pale{background:var(--bg);color:var(--text)}
.section-head{max-width:760px;margin:0 auto 64px;text-align:center}
.section-head h2{margin-top:14px}
.section-head p{margin-top:14px;color:var(--text-muted);font-size:17px}
.eyebrow{font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-dark)}
.nowrap{white-space:nowrap}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono)}
.stack>*+*{margin-top:24px}
.grid-two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.grid-three{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.grid-two>*,.grid-three>*{min-width:0}
.card,.panel{padding:28px;border:1px solid var(--border);border-radius:var(--r-card);background:var(--bg-panel);color:var(--text)}
.card h3+p,.panel h3+p{margin-top:12px}
.card p,.panel p{color:var(--text-muted)}
.card-link{display:block;transition:border-color var(--fast),transform var(--fast)}
.card-link:hover{border-color:var(--accent-dark);transform:translateY(-3px)}
.prose{max-width:100%;line-height:1.85}
.prose p,.prose ul,.prose ol,.prose pre,.prose blockquote{margin-top:20px;margin-bottom:20px}
.prose h2{margin-top:64px;margin-bottom:24px;scroll-margin-top:112px}
.prose h3{margin-top:36px;margin-bottom:16px;scroll-margin-top:112px}
.prose a:not(.btn):not(.appstore-button){color:var(--accent-dark);text-decoration:underline;text-underline-offset:4px}
.prose li+li{margin-top:8px}
.prose :not(pre)>code{background:var(--bg-panel-2);color:var(--text-2);border-radius:var(--r-btn);padding:2px 5px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:50px;padding:12px 22px;border:1px solid transparent;border-radius:var(--r-btn);font-family:var(--font-mono);font-size:13px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;text-align:center;transition:background-color var(--fast),transform var(--fast)}
.btn svg{width:16px;height:16px}
.btn-ink{background:var(--text);color:var(--bg-panel);box-shadow:var(--shadow-btn)}
.btn-ink:hover,.btn-ink.is-hover{background:var(--ink-hover);color:var(--bg-panel)}
.btn-soft{background:var(--btn-soft);color:var(--text)}
.btn-soft:hover,.btn-soft.is-hover{background:var(--btn-soft-hover);color:var(--text)}
.btn-outline{background:var(--bg-panel);color:var(--text);border-color:var(--border-strong)}
.btn-outline:hover{background:var(--bg);color:var(--text);border-color:var(--accent-dark)}
.btn:active{transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;pointer-events:none}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.skip-link{position:fixed;left:24px;top:8px;z-index:100;background:var(--text);color:var(--bg-panel);padding:12px 20px;transform:translateY(-160%);border-radius:var(--r-btn)}
.skip-link:focus{transform:translateY(0)}
.reveal{opacity:1;transform:none}
.reveal.reveal-pending{opacity:0;transform:translateY(18px);transition:opacity var(--reveal-time) var(--ease),transform var(--reveal-time) var(--ease)}
.reveal.shown{opacity:1;transform:none}
.topbar{position:absolute;top:20px;left:0;right:0;z-index:40;padding-inline:24px}
.bar{position:relative;z-index:31;max-width:1392px;min-height:64px;margin-inline:auto;display:flex;align-items:center;gap:12px;padding:0 12px 0 20px;background:var(--bg-panel);color:var(--text);border-radius:var(--r-card);box-shadow:var(--shadow-bar)}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{display:block;width:34px;height:34px;flex-shrink:0;border-radius:var(--r-circle)}
.brand-placeholder{position:relative;width:34px;height:34px;border:1px solid var(--border-strong);border-radius:var(--r-shot);background:var(--bg-panel);color:var(--text);flex-shrink:0}
.brand-placeholder::after{content:"";position:absolute;inset:7px;border:1.5px dashed var(--border-strong);border-radius:var(--r-btn)}
.brand-name{font-family:var(--font-display);font-size:16px;font-weight:700;letter-spacing:-.01em}
.tabs-nav{margin-left:auto;align-self:stretch;min-width:0}
.tabs-nav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;height:100%;gap:0}
.tabs-nav li{height:100%}
.tabs-nav a{position:relative;display:flex;align-items:center;min-height:64px;height:100%;padding-inline:18px;font-size:15px;color:var(--text-muted);white-space:nowrap}
.tabs-nav a::after{content:"";position:absolute;left:18px;right:18px;bottom:0;height:3px;background:var(--accent);border-radius:var(--r-btn) var(--r-btn) 0 0;transform:scaleX(0);opacity:.4;transition:transform 250ms var(--ease),opacity 250ms var(--ease)}
.tabs-nav a:hover{color:var(--text)}
.tabs-nav a:hover::after{transform:scaleX(.5)}
.tabs-nav a[aria-current="page"]{font-weight:600;color:var(--text)}
.tabs-nav a[aria-current="page"]::after{transform:scaleX(1);opacity:1}
.header-tools{display:flex;align-items:center;gap:8px;flex-shrink:0}
.header-tools::before{content:"";width:1px;height:24px;margin-inline:2px 10px;background:var(--border);flex-shrink:0}
.language{position:relative}
.lang-button,.menu-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:8px 12px;border:1px solid var(--border);border-radius:var(--r-btn);background:var(--bg-panel);color:var(--text-2);font-size:14px}
.lang-button svg,.menu-button svg{width:18px;height:18px}
.lang-short{display:none}
.language-menu{position:absolute;right:0;top:calc(100% + 10px);width:200px;margin:0;padding:8px;list-style:none;background:var(--bg-panel);color:var(--text);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow-float);z-index:4}
.language-menu a{display:flex;align-items:center;min-height:44px;width:100%;padding:10px 12px;border-radius:var(--r-btn)}
.language-menu a:hover,.language-menu a[aria-current="true"]{background:var(--bg-panel-2);color:var(--text)}
.menu-button{display:none;min-width:44px}
.mobile-drawer{display:none}
.menu-veil{position:fixed;inset:0;z-index:30;background:var(--ink-a20);color:var(--text);border:0;border-radius:0}
.footer{background:var(--bg-panel-2);color:var(--text);padding-top:72px;padding-bottom:32px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1.3fr 1fr;gap:40px}
.footer-brand p{margin-top:20px;max-width:30em;color:var(--text-muted);font-size:14px}
.footer h2{font-size:14px;letter-spacing:0;margin-bottom:16px}
.footer ul{list-style:none;margin:0;padding:0}
.footer li+li{margin-top:8px}
.footer li a{display:inline-block;padding-block:5px;color:var(--text-muted);font-size:14px}
.footer a:hover{color:var(--accent-dark);text-decoration:underline;text-underline-offset:4px}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:56px;padding-top:24px;border-top:1px solid var(--border-strong);font-size:12px;color:var(--text-muted)}
@media(min-width:1600px){.bar{max-width:min(100%,calc(1280px + var(--gutter)*2))}}
@media(max-width:1279px){
  .tabs-nav:not(.preview-nav){display:none}
  .header-tools{margin-left:auto}
  .menu-button{display:inline-flex}
  .mobile-drawer{position:absolute;left:0;right:0;top:calc(100% + 8px);padding:16px;background:var(--bg-panel);color:var(--text);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow-float);max-height:calc(100dvh - 112px);overflow-y:auto;overscroll-behavior:contain}
  .mobile-drawer:not([hidden]){display:block}
  .mobile-drawer ul{list-style:none;margin:0;padding:0}
  .mobile-drawer a{display:flex;align-items:center;min-height:48px;width:100%;padding:12px 16px;border-radius:var(--r-btn)}
  .mobile-drawer a:hover,.mobile-drawer a[aria-current]{background:var(--bg-panel-2);color:var(--text)}
  .drawer-languages{margin-top:16px!important;padding-top:16px!important;border-top:1px solid var(--border)}
}
@media(max-width:1023px){
  :root{--gutter:24px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .preview-bar{flex-wrap:wrap;padding-top:10px}
  .preview-nav{order:3;width:100%;margin-left:0;border-top:1px solid var(--border);overflow-x:auto}
  .preview-nav a{min-height:48px;padding-inline:14px}
}
@media(max-width:768px){
  h1{font-size:clamp(24px,5vw,30px)}
  .grid-three{grid-template-columns:1fr}
}
@media(max-width:640px){
  :root{--gutter:20px}
  .topbar{padding-inline:12px;top:12px}
  .bar{padding-left:12px;padding-right:8px;gap:8px}
  .brand{gap:8px;flex-shrink:1;min-width:0}
  .brand-name{font-size:13px;overflow-wrap:anywhere}
  .brand-mark,.brand-placeholder{width:30px;height:30px}
  .header-tools{margin-left:auto;gap:4px}
  .header-tools::before{display:none}
  .lang-full{display:none}
  .lang-short{display:inline}
  .lang-button{padding-inline:9px}
  .grid-two,.footer-grid{grid-template-columns:1fr}
  .card,.panel{padding:22px}
  .tilt,[data-tilt]{transform:none!important}
  .footer-grid{gap:32px}
  .section-head{margin-bottom:40px}
  .preview-bar .brand-name{font-size:13px}
  .preview-nav ul{justify-content:space-between}
  .preview-nav a{font-size:13px;padding-inline:10px}
  .preview-nav a::after{left:10px;right:10px}
}
@media(max-width:360px){
  :root{--gutter:16px}
  .brand-name{font-size:12px}
  .brand-mark{width:26px;height:26px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal.reveal-pending{opacity:1;transform:none}
}