:root{
  --bg:#F6EEE0;
  --bg-panel:#FFFBF4;
  --bg-panel-2:#EFE5D3;
  --border:#E2D6C2;
  --border-strong:#D3C4AA;
  --border-soft:rgba(42,33,25,.08);
  --accent:#4D3FD6;
  --accent-dark:#2F2496;
  --accent-2:#7A6CF0;
  --accent-3:#5A4DE0;
  --lavender:#DCD5FF;
  --coral:#F07A55;
  --text:#2A2119;
  --text-muted:#6E6253;
  --ink-hover:#3B2F25;
  --on-dark:#FFFBF4;
  --white:#FFFFFF;
  --success:#2F8A5B;
  --warn:#C9821E;
  --error:#C2412F;
  --hero-top:#FBF6EC;
  --hero-bottom:#F1E6D4;
  --plinth-top:#EFE5D3;
  --plinth-front:#E2D6C2;
  --plinth-side:#D6C7AE;
  --accent-a06:rgba(77,63,214,.06);
  --accent-a10:rgba(77,63,214,.10);
  --accent-a12:rgba(77,63,214,.12);
  --accent-a18:rgba(77,63,214,.18);
  --accent-a28:rgba(77,63,214,.28);
  --accent-a40:rgba(77,63,214,.40);
  --coral-a06:rgba(240,122,85,.06);
  --coral-a20:rgba(240,122,85,.20);
  --coral-a35:rgba(240,122,85,.35);
  --white-a14:rgba(255,255,255,.14);
  --white-a20:rgba(255,255,255,.20);
  --white-a35:rgba(255,255,255,.35);
  --white-a55:rgba(255,255,255,.55);
  --white-a80:rgba(255,255,255,.80);
  --text-a12:rgba(42,33,25,.12);
  --text-a40:rgba(42,33,25,.40);
  --glass-hi:rgba(122,108,240,.56);
  --glass-lo:rgba(47,36,150,.76);
  --flag-red:#C8372D;
  --flag-blue:#29387A;
  --flag-green:#2E7D4F;
  --flag-white:#FFFDF8;
  --transparent:transparent;
  --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:4px;
  --r-sm:6px;
  --r-md:8px;
  --r-lg:10px;
  --r-pill:999px;
  --r-round:50%;
  --r-face:2px;
  --gutter:48px;
  --shell-width:1280px;
  --reading-width:840px;
  --header-height:68px;
  --anchor-offset:84px;
  --toc-offset:84px;
  --toc-landing:160px;
  --duration:.2s;
  --panel-shadow:0 24px 56px -26px var(--accent-a28);
  --grain:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .165 0 0 0 0 .13 0 0 0 0 .1 0 0 0 1 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23g)'/%3E%3C/svg%3E");
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-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-size:17px;line-height:1.75;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body::after{content:"";position:fixed;inset:0;pointer-events:none;background-image:var(--grain);opacity:.03;mix-blend-mode:multiply;z-index:60}
[hidden]{display:none!important}
img{max-width:100%;height:auto;vertical-align:middle}
svg{vertical-align:middle;flex-shrink:0}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
button,a{-webkit-tap-highlight-color:var(--accent-a12)}
button{color:inherit}
a{color:var(--accent);text-underline-offset:4px}
a:hover{color:var(--accent-dark)}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:var(--r-xs)}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--text);line-height:1.25;text-wrap:balance;overflow-wrap:break-word}
h1{font-size:clamp(52px,4.7vw,68px);font-weight:800;letter-spacing:-.02em;margin:0 0 24px;line-height:1.1}
h2{font-size:36px;font-weight:800;letter-spacing:-.02em;margin:0 0 24px}
h3{font-size:24px;font-weight:700;margin:0 0 16px}
h4{font-size:19px;margin:0 0 12px}
p{margin:0 0 20px}
ul,ol{padding-inline-start:24px}
li{margin-block:6px}
hr{border:0;border-top:1px solid var(--border);margin-block:32px}
blockquote{margin-inline:0}
code,kbd,pre{font-family:var(--font-mono)}
code{font-size:.88em;overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:24px;background:var(--bg-panel-2);border:1px solid var(--border);border-radius:var(--r-md);font-size:14px;line-height:1.8}
pre code{overflow-wrap:normal;white-space:pre}
table{border-collapse:collapse}
th,td{word-break:keep-all}
section[id],h2[id],h3[id]{scroll-margin-top:var(--anchor-offset)}
.no-break{white-space:nowrap}
.shell,.wrap{width:100%;max-width:var(--shell-width);margin-inline:auto;padding-inline:var(--gutter)}
.reading-wrap{width:100%;max-width:var(--reading-width);margin-inline:auto;padding-inline:var(--gutter)}
.sec{padding-top:96px;padding-bottom:96px}
.section-head{max-width:760px;margin-bottom:40px}
.section-head p,.muted{color:var(--text-muted)}
.grid-two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
.grid-three{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
:where(.grid-two,.grid-three,.hero-grid,.footer-grid,.feature-browser,.steps-layout)>*{min-width:0}
.panel,.card{background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--panel-shadow),inset 0 1px 0 var(--white);padding:32px;min-width:0}
.panel-inset{background:var(--bg-panel-2);border:1px solid var(--border);border-radius:var(--r-md);padding:24px}
.prose{min-width:0;overflow-wrap:break-word}
.prose>h2{margin-top:64px}
.prose>h3{margin-top:32px}
.prose li{padding-inline-start:4px}
.prose a{overflow-wrap:anywhere}
.prose img{border-radius:var(--r-md)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:52px;padding:0 24px;border:1px solid var(--transparent);border-radius:var(--r-md);font-family:var(--font-body);font-size:16px;font-weight:600;line-height:1;text-decoration:none;white-space:nowrap;flex-shrink:0;transition:background var(--duration) ease,transform var(--duration) ease,box-shadow var(--duration) ease}
.btn-solid,.btn-primary{padding-inline:30px;background:var(--text);color:var(--on-dark);box-shadow:0 16px 30px -16px var(--text-a40),inset 0 1px 0 var(--white-a14)}
.btn-solid:hover,.btn-primary:hover{background:var(--ink-hover);color:var(--on-dark);transform:translateY(-1px)}
.btn-secondary{background:var(--bg-panel);color:var(--text);border-color:var(--border-strong)}
.btn-secondary:hover{background:var(--bg-panel-2);color:var(--text)}
.btn-arrow{padding-inline:4px;color:var(--text);background:var(--transparent)}
.btn-arrow:hover{color:var(--accent)}
.btn-arrow-glyph{transition:transform var(--duration) ease}
.btn-arrow:hover .btn-arrow-glyph{transform:translateX(4px)}
.btn:active{transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;pointer-events:none}
.btn-small{height:40px;padding-inline:18px;font-size:14px}
.btn-demo-hover{background:var(--ink-hover);color:var(--on-dark)}
.btn-demo-focus{outline:2px solid var(--accent);outline-offset:3px}
.cta-row{display:flex;align-items:center;flex-wrap:wrap;gap:28px;margin-top:38px}
.ink-link{color:var(--accent);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px;text-decoration-color:var(--accent-a40);transition:color var(--duration) ease,text-decoration-color var(--duration) ease}
.ink-link:hover{color:var(--accent-dark);text-decoration-color:var(--accent-dark)}
.masthead{position:relative;z-index:100;border-bottom:1px solid var(--border-soft)}
.masthead-row{display:flex;align-items:center;flex-wrap:nowrap;height:var(--header-height);gap:32px}
.brandmark{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;flex:0 0 auto}
.brandmark:hover{color:var(--text)}
.brandmark-logo{width:32px;height:32px;flex:0 0 32px}
.brand-en{font-family:var(--font-display);font-weight:800;font-size:19px;letter-spacing:-.02em;line-height:1}
.brand-zh{font-size:13px;font-weight:500;color:var(--text-muted);line-height:1;padding-left:10px;border-left:1px solid var(--border-strong)}
.tabs{flex:1 1 auto;min-width:0}
.tabs ul{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0}
.tabs li{margin:0;flex-shrink:0}
.tabs a{position:relative;display:block;padding:0 12px;line-height:67px;font-size:14.5px;font-weight:500;color:var(--text-muted);text-decoration:none;white-space:nowrap;transition:color var(--duration) ease}
.tabs a::after{content:"";position:absolute;left:12px;right:12px;bottom:-1px;height:2px;border-radius:var(--r-face) var(--r-face) 0 0;background:var(--border-strong);transform:scaleX(0);transition:transform .25s ease}
.tabs a:hover{color:var(--text)}
.tabs a:hover::after{transform:scaleX(1)}
.tabs a.is-active{color:var(--text);font-weight:600}
.tabs a.is-active::after{transform:scaleX(1);background:var(--accent)}
.masthead-tools{display:flex;align-items:center;gap:12px;flex:0 0 auto;margin-left:auto}
.language-control{position:relative}
.lang-switch{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;width:auto;height:36px;padding:0 10px;border:0;border-radius:var(--r-md);background:var(--transparent);font-family:var(--font-body);font-size:14px;color:var(--text-muted);cursor:pointer}
.lang-switch:hover{background:var(--bg-panel-2);color:var(--text)}
.lang-switch svg{width:16px;height:16px;flex:0 0 16px}
.lang-label{white-space:nowrap}
.lang-caret{font-size:11px}
.language-panel{position:absolute;right:0;top:calc(100% + 12px);z-index:120;min-width:184px;padding:8px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--panel-shadow)}
.language-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:var(--r-sm);color:var(--text);text-decoration:none}
.language-panel a:hover,.language-panel a[aria-current]{background:var(--bg-panel-2);color:var(--accent-dark)}
.nav-login{display:inline-flex;align-items:center;justify-content:center;height:36px;padding:0 18px;border:1px solid var(--text);border-radius:var(--r-md);background:var(--bg-panel);color:var(--text);font-size:14px;font-weight:600;text-decoration:none;white-space:nowrap;transition:background var(--duration) ease,color var(--duration) ease}
.nav-login:hover{background:var(--text);color:var(--on-dark)}
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:5px;min-width:44px;min-height:44px;padding:10px;border:1px solid var(--border);border-radius:var(--r-md);background:var(--bg-panel);color:var(--text)}
.menu-line{display:block;width:20px;height:2px;background:currentColor;flex-shrink:0;transition:transform var(--duration) ease}
.menu-toggle[aria-expanded="true"] .menu-line:first-child{transform:translateY(7px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] .menu-line:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] .menu-line:last-child{transform:translateY(-7px) rotate(-45deg)}
.nav-drawer{display:none;position:fixed;z-index:95;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;padding:20px var(--gutter) 40px;background:var(--bg-panel);border-top:1px solid var(--border)}
.nav-drawer a{display:flex;align-items:center;width:100%;min-height:48px;padding:12px 16px;text-decoration:none;color:var(--text);border-bottom:1px solid var(--border)}
.nav-drawer a:hover,.nav-drawer a.is-active{background:var(--bg-panel-2);color:var(--accent-dark)}
.drawer-languages{margin-top:24px;border-top:1px solid var(--border-strong)}
.nav-veil{display:none;position:fixed;z-index:80;top:var(--header-height);inset-inline:0;bottom:0;border:0;background:var(--text-a40)}
.site-footer{border-top:1px solid var(--border);background:var(--bg-panel-2);padding-top:64px;padding-bottom:24px}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:64px}
.footer-brand p{margin-top:24px;max-width:340px;color:var(--text-muted);font-size:15px}
.footer-title{font-size:14px;font-weight:700;margin:0 0 16px}
.footer-links{list-style:none;padding:0;margin:0;display:grid;gap:4px}
.footer-links li{margin:0}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:32px;color:var(--text-muted);font-size:14px;text-decoration:none}
.footer-links a:hover,.footer-languages a:hover,.footer-legal a:hover{color:var(--accent)}
.footer-languages{display:flex;flex-wrap:wrap;gap:12px 24px;margin-top:40px;padding-top:24px;border-top:1px solid var(--border-strong)}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;align-items:center;gap:16px;margin-top:20px;font-size:13px;color:var(--text-muted)}
.footer-bottom p{margin:0}
.footer-legal{display:flex;flex-wrap:wrap;gap:24px}
.reveal{transition:opacity .35s ease,transform .35s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:relative;display:block;width:100%;max-width:100%;min-width:0;overflow:hidden;margin-top:24px;margin-bottom:32px}
#server-status+*{margin-top:32px}
#server-status>*{min-width:0;max-width:100%}
.decorated-section{position:relative;overflow-x:clip}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
@media(max-width:1180px){
  .brand-zh{display:none}
  .masthead-row{gap:20px}
  .tabs a{padding-inline:9px;font-size:14px}
}
@media(max-width:1080px){
  .tabs ul{overflow-x:auto;scrollbar-width:none}
  .tabs ul::-webkit-scrollbar{display:none}
}
@media(max-width:900px){
  .footer-grid{gap:32px;grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
}
@media(max-width:768px){
  :root{--gutter:24px}
  h1{font-size:40px}
  h2{font-size:30px}
  .tabs{display:none}
  .masthead-tools{margin-left:auto;gap:8px}
  .menu-toggle{display:flex}
  html.nav-open .nav-drawer{display:block}
  html.nav-open .nav-veil{display:block}
  .masthead-row>.brandmark,.masthead-tools{position:relative;z-index:101}
  .sec{padding-top:64px;padding-bottom:64px}
  .grid-three,.grid-two{grid-template-columns:minmax(0,1fr)}
  .footer-grid{gap:28px}
}
@media(max-width:640px){
  .no-break{white-space:normal}
  h1{font-size:36px}
  h2{font-size:28px}
  h3{font-size:22px}
  body{font-size:16px}
  .tilt,.micro-tilt,[data-tilt]{transform:none}
  .decorated-section{max-width:100%}
  .panel,.card{padding:24px}
  .cta-row{gap:16px 24px;margin-top:30px}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-brand{grid-column:auto}
}
@media(max-width:480px){
  :root{--gutter:20px}
  .lang-switch .lang-label{display:none}
  .masthead-row{gap:10px}
  .masthead-tools{gap:6px}
  .nav-login{padding-inline:12px}
  .footer-bottom{align-items:flex-start;flex-direction:column}
}
@media(max-width:350px){
  :root{--gutter:16px}
  .brand-en{font-size:17px}
  .brandmark{gap:6px}
  .brandmark-logo{width:28px;height:28px;flex-basis:28px}
  .masthead-tools{gap:4px}
  .lang-switch{padding-inline:6px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending{opacity:1;transform:none;transition:none}
  *,*::before,*::after{animation-duration:0s!important;animation-iteration-count:1!important;transition-duration:0s!important}
}