:root {
  --bg:#FFFFFF;
  --bg-panel:#F7F7F8;
  --bg-panel-2:#EEEFF1;
  --border:#E3E4E8;
  --border-strong:#C8CAD0;
  --accent:#2B59C3;
  --accent-dark:#1E3F8F;
  --accent-soft:#E8EEF9;
  --text:#2A2C31;
  --text-muted:#6B6F78;
  --success:#2E9E6A;
  --warn:#E8B53A;
  --error:#E0506E;
  --on-accent:#FFFFFF;
  --device:#1D1F23;
  --closing:#2C2E33;
  --tint-pink:#FCEAEE;
  --edge-pink:#F3C2CD;
  --ink-pink:#A2304A;
  --tint-yellow:#FBF2DA;
  --edge-yellow:#EED48C;
  --ink-yellow:#7A5A10;
  --tint-green:#E3F3EA;
  --edge-green:#ACD9C0;
  --ink-green:#1E6B47;
  --hair:rgba(0,0,0,.16);
  --sheen:rgba(255,255,255,.78);
  --sheen-0:rgba(255,255,255,0);
  --veil:rgba(29,31,35,.38);
  --shadow-device:inset 0 1px 0 rgba(255,255,255,.07),0 0 0 1px rgba(14,15,17,.92),0 14px 28px -10px rgba(29,31,35,.34),0 52px 104px -30px rgba(29,31,35,.32);
  --shadow-window:0 0 0 1px rgba(0,0,0,.55),0 1px 3px rgba(0,0,0,.45);
  --shadow-pill:0 6px 14px -6px rgba(29,31,35,.30);
  --shadow-btn:inset 0 1px 0 rgba(255,255,255,.18),0 1px 2px rgba(30,63,143,.30),0 8px 18px -8px rgba(43,89,195,.50);
  --shadow-seg:0 1px 2px rgba(29,31,35,.14),0 0 0 1px rgba(29,31,35,.04);
  --shadow-knob:0 1px 2px rgba(29,31,35,.28);
  --shadow-menu:0 16px 40px -12px rgba(29,31,35,.20);
  --shadow-pipe:inset 0 2px 3px rgba(255,255,255,.9),inset 0 -5px 9px rgba(107,111,120,.18),0 6px 10px rgba(29,31,35,.10);
  --r-device:24px;
  --r-window:12px;
  --r-panel:32px;
  --r-workbench:28px;
  --r-card:24px;
  --r-btn:12px;
  --r-small:8px;
  --r-mini:7px;
  --r-key:5px;
  --r-skeleton:3px;
  --r-pill:999px;
  --r-circle:50%;
  --font-display:Georgia,'Songti SC','STSong','Noto Serif CJK SC','Source Han Serif SC','SimSun',serif;
  --font-body:'Inter','Noto Sans SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
  --font-mono:'JetBrains Mono','SFMono-Regular',Menlo,Consolas,'Liberation Mono',monospace;
  --weight-normal:400;
  --weight-medium:500;
  --weight-semibold:600;
  --weight-bold:700;
  --size-body:16px;
  --size-small:14px;
  --size-h1:clamp(34px,3.2vw,46px);
  --size-h2:clamp(26px,2.6vw,36px);
  --size-h3:24px;
  --leading-body:1.6;
  --leading-prose:1.85;
  --leading-heading:1.22;
  --gutter:48px;
  --content-width:1296px;
  --reading-width:800px;
  --head-content:1280px;
  --head-height:72px;
  --section-space:88px;
  --ease:cubic-bezier(.4,0,.2,1);
  --duration-fast:.15s;
  --duration-reveal:.6s;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
html,body{margin:0}
body{background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--size-body);line-height:var(--leading-body);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
html.nav-open{overflow:hidden}
[hidden]{display:none!important}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
button,a,input,summary,select,textarea{-webkit-tap-highlight-color:var(--accent-soft)}
:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
img,svg{max-width:100%;vertical-align:middle}
img{height:auto}
svg{flex-shrink:0}
figure{margin:0}
h1,h2,h3{font-family:var(--font-display);font-weight:var(--weight-bold);line-height:var(--leading-heading);text-wrap:balance;letter-spacing:.005em}
h1{font-size:var(--size-h1);margin:0 0 28px}
h2{font-size:var(--size-h2);margin:0 0 24px}
h3{font-size:var(--size-h3);margin:0 0 16px}
p{margin:0 0 20px}
ul,ol{padding-inline-start:24px}
strong{font-weight:var(--weight-semibold)}
code,kbd,pre{font-family:var(--font-mono)}
code{overflow-wrap:anywhere;font-size:.9em}
pre{max-width:100%;min-width:0;overflow-x:auto;padding:24px;border:1px solid var(--border);border-radius:var(--r-window);background:var(--bg-panel);color:var(--text);font-size:14px;line-height:1.7;tab-size:2}
pre code{overflow-wrap:normal;word-break:normal;white-space:pre;font-size:inherit}
hr{border:0;border-top:1px solid var(--border);margin:40px 0}
.wrap{width:100%;max-width:calc(var(--content-width) + var(--gutter)*2);padding-inline:var(--gutter);margin-inline:auto}
.reading{max-width:calc(var(--reading-width) + var(--gutter)*2);padding-inline:var(--gutter);margin-inline:auto}
.section{padding-top:var(--section-space);padding-bottom:var(--section-space)}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.grid>*,.hero__grid>*,.footer-grid>*,.workbench__body>*{min-width:0}
.stack>*+*{margin-top:24px}
.nowrap,.kw{white-space:nowrap}
.kw,.text-accent{color:var(--accent)}
.text-muted,.meta{color:var(--text-muted)}
.meta{font-size:var(--size-small)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;top:8px;left:16px;z-index:100;padding:10px 16px;background:var(--bg);color:var(--accent);border:1px solid var(--accent);border-radius:var(--r-small)}
.skip-link:not(:focus){width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);clip-path:inset(50%);white-space:nowrap}
.panel,.card{border:1px solid var(--border);background:var(--bg);color:var(--text)}
.panel{border-radius:var(--r-panel);padding:40px}
.panel--soft{background:var(--bg-panel);color:var(--text)}
.card{border-radius:var(--r-card);padding:28px}
.card p:last-child,.panel p:last-child{margin-bottom:0}
.prose{line-height:var(--leading-prose);min-width:0}
.prose h2{margin-top:64px}
.prose h3{margin-top:36px}
.prose a:not(.btn){color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.prose li+li{margin-top:8px}
.prose img{max-width:100%}
.prose blockquote{margin-inline:0}
.btn{display:inline-flex;justify-content:center;align-items:center;gap:8px;min-height:48px;padding:10px 22px;border:1px solid var(--sheen-0);border-radius:var(--r-btn);font-size:15.5px;font-weight:var(--weight-semibold);line-height:1.5;text-align:center;transition:background-color var(--duration-fast),border-color var(--duration-fast)}
.btn svg{width:18px;height:18px}
.btn--primary{background:var(--accent);color:var(--on-accent);box-shadow:var(--shadow-btn)}
.btn--primary:hover,.btn--primary.is-hover{background:var(--accent-dark);color:var(--on-accent)}
.btn--primary:active,.btn--primary.is-active{background:var(--accent-dark);color:var(--on-accent);box-shadow:var(--shadow-seg)}
.btn--ghost{background:var(--bg-panel);color:var(--text);border-color:var(--border)}
.btn--ghost:hover,.btn--ghost.is-hover{border-color:var(--border-strong);background:var(--bg-panel-2);color:var(--text)}
.btn--ghost svg{width:15px;height:15px;color:var(--text-muted)}
.btn--small{min-height:40px;padding:8px 16px;font-size:14px}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--bg-panel-2);color:var(--text-muted);border-color:var(--border);box-shadow:none;cursor:not-allowed}
.btn.is-focus{outline:2px solid var(--accent);outline-offset:4px}
.cta,.button-row{display:flex;align-items:center;flex-wrap:wrap;gap:12px}
.cta{margin-bottom:24px}
.site-head{position:relative;z-index:40;height:var(--head-height);border-bottom:1px solid var(--border);background:var(--bg);color:var(--text)}
.head-shell{max-width:min(100%,calc(var(--head-content) + var(--gutter)*2));height:100%;padding-inline:var(--gutter);margin-inline:auto;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:11px;font-size:16px;font-weight:var(--weight-semibold);letter-spacing:.01em;flex-shrink:0}
.brand img{width:32px;height:32px;flex-shrink:0}
.nav{display:flex;align-items:center;min-width:0;margin-left:auto}
.nav-list{display:flex;align-items:center;list-style:none;margin:0;padding:0;font-size:14.5px}
.nav-list li{display:flex;align-items:center;flex-shrink:0}
.nav-list li+li::before{content:"·";color:var(--border-strong);margin:0 13px;font-weight:var(--weight-bold)}
.nav-list a{display:block;padding:6px 1px;color:var(--text);transition:color var(--duration-fast)}
.nav-list a:hover,.nav-list a[aria-current="page"]{color:var(--accent)}
.nav-list a[aria-current="page"]{font-weight:var(--weight-semibold)}
.head-tools{display:flex;align-items:center;gap:10px;flex-shrink:0}
.lang-picker{position:relative}
.lang{display:inline-flex;align-items:center;gap:7px;min-height:34px;padding:6px 12px 6px 11px;border:1px solid var(--border);border-radius:var(--r-pill);background:var(--bg);color:var(--text);font-size:13.5px;white-space:nowrap}
.lang svg{width:15px;height:15px;color:var(--text-muted)}
.lang__caret{font-size:10px;color:var(--text-muted)}
.lang:hover{border-color:var(--border-strong)}
.lang-short{display:none}
.lang-menu{position:absolute;top:calc(100% + 12px);right:0;min-width:180px;list-style:none;padding:8px;margin:0;border:1px solid var(--border);border-radius:var(--r-window);background:var(--bg);color:var(--text);box-shadow:var(--shadow-menu);z-index:44}
.lang-menu a{display:flex;align-items:center;min-height:44px;padding:10px 14px;border-radius:var(--r-small)}
.lang-menu a:hover,.lang-menu a[aria-current]{background:var(--accent-soft);color:var(--accent-dark)}
.menu-toggle{display:none;min-width:44px;min-height:44px;padding:10px;border:1px solid var(--border);border-radius:var(--r-btn);background:var(--bg);color:var(--text)}
.menu-toggle svg{width:22px;height:22px}
.mobile-drawer{position:absolute;top:100%;left:0;right:0;z-index:43;max-height:calc(100dvh - var(--head-height));overflow-y:auto;overscroll-behavior:contain;padding:16px var(--gutter) 24px;border-bottom:1px solid var(--border);background:var(--bg);color:var(--text)}
.mobile-drawer ul{list-style:none;padding:0;margin:0}
.mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px 16px;border-radius:var(--r-small)}
.mobile-drawer a:hover,.mobile-drawer a[aria-current]{background:var(--accent-soft);color:var(--accent-dark)}
.mobile-drawer__languages{border-top:1px solid var(--border);margin-top:16px;padding-top:16px}
.menu-veil{position:fixed;inset:var(--head-height) 0 0;z-index:30;border:0;background:var(--veil);color:var(--text)}
.static-mobile{display:none}
.hero{padding-top:56px;padding-bottom:56px;overflow-x:clip}
.hero__grid{display:grid;grid-template-columns:minmax(0,1fr) 756px;gap:108px;align-items:center}
.hero__copy{max-width:432px}
.badge{display:inline-flex;align-items:center;gap:9px;min-height:30px;margin:0 0 24px;padding:4px 14px 4px 12px;border:1px solid var(--border);border-radius:var(--r-pill);background:var(--bg);color:var(--text-muted);font-size:13px;max-width:100%}
.badge__dot{width:7px;height:7px;flex-shrink:0;border-radius:var(--r-circle);background:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.hero h1{margin:0 0 28px;font-size:var(--size-h1);line-height:1.22}
.hero h1 .line{display:block}
.lede{margin:0 0 28px;max-width:420px;font-size:16px;line-height:1.75;color:var(--text-muted)}
.lede strong{color:var(--text)}
.plat-cap{margin:0 0 10px;font-size:12.5px;line-height:20px;color:var(--text-muted);letter-spacing:.04em}
.platforms{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0;padding:0}
.plat{display:inline-flex;align-items:center;gap:7px;min-height:34px;padding:6px 13px 6px 11px;border:1px solid var(--border);border-radius:var(--r-pill);background:var(--bg);color:var(--text);font-size:13.5px;transition:border-color var(--duration-fast),color var(--duration-fast)}
.plat svg{width:15px;height:15px;color:var(--text)}
.plat:hover{border-color:var(--accent);color:var(--accent)}
.plat:hover svg{color:var(--accent)}
.closing-band{padding:28px var(--gutter);background:var(--closing);color:var(--on-accent);text-align:center}
.closing-band p{margin:0}
.site-footer{padding-top:64px;padding-bottom:32px;background:var(--bg);color:var(--text);border-top:1px solid var(--border)}
.footer-grid{display:grid;grid-template-columns:1.15fr 1fr 1.35fr .8fr;gap:48px}
.footer-intro{max-width:290px;margin-top:20px;color:var(--text-muted);font-size:14px}
.footer-title{font-family:var(--font-body);font-size:14px;font-weight:var(--weight-semibold);margin-bottom:16px}
.footer-links{list-style:none;padding:0;margin:0;font-size:14px}
.footer-links a{display:inline-block;padding:5px 0;color:var(--text-muted)}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{margin-top:48px;padding-top:24px;border-top:1px solid var(--border);display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;color:var(--text-muted);font-size:13px}
.footer-bottom p{margin:0}
.reveal{opacity:1;transform:none}
.reveal-pending .reveal:not(.shown){opacity:0;transform:translateY(18px)}
.reveal-pending .reveal{transition:opacity var(--duration-reveal) var(--ease),transform var(--duration-reveal) var(--ease)}
.reveal.shown{opacity:1;transform:none}
.decorated{position:relative;overflow-x:clip}
@media(min-width:1392px) and (max-width:1487px){
  .wrap{max-width:1392px}
}
@media(max-width:1360px){
  .hero__grid{grid-template-columns:minmax(0,1fr);gap:64px}
  .hero__copy{max-width:640px;margin-inline:auto;text-align:center}
  .cta,.platforms{justify-content:center}
  .lede{margin-inline:auto}
}
@media(max-width:1279px){
  .nav{display:none}
  .head-tools{margin-left:auto}
  .menu-toggle{display:inline-flex;align-items:center;justify-content:center}
  .static-mobile{display:block}
  .static-mobile summary{list-style:none;display:flex;align-items:center;justify-content:center}
  .static-mobile summary::-webkit-details-marker{display:none}
}
@media(max-width:1280px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(min-width:1280px){
  .mobile-drawer{display:none}
}
@media(max-width:880px){
  :root{--gutter:20px;--section-space:56px}
  .hero{padding-top:40px;padding-bottom:40px}
  .grid{grid-template-columns:minmax(0,1fr)}
  .panel{padding:28px}
}
@media(max-width:768px){
  :root{--size-h1:clamp(24px,4vw,30px);--size-h2:26px;--size-h3:22px}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .head-shell{gap:10px}
  .brand{gap:8px;font-size:14px}
  .brand img{width:28px;height:28px}
  .head-tools{margin-left:auto;gap:6px}
  .lang-full{display:none}
  .lang-short{display:inline}
  .lang{padding-inline:10px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:32px}
  .card,.panel{padding:22px}
  .tilt,[data-tilt]{transform:none!important}
  .hero__grid{gap:40px}
  .hero__copy{max-width:100%}
  .hero .btn{padding-inline:17px}
  .platforms{flex-direction:row;flex-wrap:wrap;justify-content:center}
  .badge{font-size:12px}
  pre{padding:16px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal-pending .reveal:not(.shown){opacity:1;transform:none}
}