:root{
  --bg:#F7F6F3;--bg-panel:#FFFFFF;--bg-panel-2:#EFEDF2;--border:#E2DEE8;
  --accent:#4B22B8;--accent-dark:#2C1470;--accent-soft:#7B5BD6;--accent-mist:#D9CFF1;--glass-mid:#F3EFFA;--lavender:#E9E4F3;
  --text:#1A1726;--text-muted:#5F5A6E;--success:#3F8F0A;--warn:#C27C0E;--error:#D23A3A;--hot:#FF3E8E;--lime:#B6F23A;--on-ink:#FFFFFF;
  --accent-a06:rgba(75,34,184,.06);--accent-a08:rgba(75,34,184,.08);--accent-a10:rgba(75,34,184,.10);--accent-a12:rgba(75,34,184,.12);--accent-a20:rgba(75,34,184,.20);--accent-a35:rgba(75,34,184,.35);--accent-a40:rgba(75,34,184,.40);
  --lime-a20:rgba(182,242,58,.20);--lime-a35:rgba(182,242,58,.35);--hot-a30:rgba(255,62,142,.30);--hi-line:rgba(255,255,255,.92);--hi-soft:rgba(255,255,255,.42);--veil:rgba(26,23,38,.28);--clear:transparent;
  --flag-red:#D8243A;--flag-white:#FFFFFF;--flag-blue:#24357F;--flag-hk:#DB2A21;--flag-jp:#C8102E;--flag-fr-blue:#20409A;
  --font-display:'Inter','Noto Sans SC','Noto Sans JP','Noto Sans KR','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --font-body:'Inter','Noto Sans SC','Noto Sans JP','Noto Sans KR','PingFang SC','Hiragino Sans','Microsoft YaHei',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,'SFMono-Regular',Menlo,Consolas,monospace;
  --r-card:6px;--r-tag:3px;--r-pill:999px;--r-btn:0;--r-round:50%;
  --weight-normal:400;--weight-medium:500;--weight-semibold:600;--weight-bold:700;--weight-heavy:800;--weight-display:900;
  --size-body:16px;--size-small:14px;--size-tiny:12px;--size-sub:20px;--size-h1:clamp(52px,5vw,68px);--size-h2:44px;--size-h3:24px;
  --gutter:24px;--content:1200px;--header-height:64px;--anchor-gap:80px;--toc-offset:16px;--toc-landing:96px;
  --shadow-panel:0 30px 60px -20px var(--accent-a10),0 8px 22px -10px var(--accent-a10),inset 0 1px 0 var(--hi-line);
  --shadow-float:0 16px 32px -12px var(--accent-a20),inset 0 1px 0 var(--hi-line);
  --grain:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .17 0 0 0 0 .08 0 0 0 0 .44 0 0 0 .9 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  --grain-alpha:.09;--ease-quick:200ms ease;--ease-reveal:350ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-gap);scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--size-body);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-underline-offset:4px}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
img{max-width:100%;height:auto}
svg{flex-shrink:0}
ul,ol,dl,dd,p{margin:0;padding:0}
ul{list-style:none}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--text);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:var(--size-h1);font-weight:var(--weight-display);line-height:1.1;letter-spacing:-.02em}
h2{font-size:var(--size-h2);font-weight:var(--weight-display);line-height:1.12;letter-spacing:-.02em}
h3{font-size:var(--size-h3);font-weight:var(--weight-heavy);line-height:1.3}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
[hidden]{display:none!important}
.wrap{width:100%;max-width:calc(var(--content) + var(--gutter)*2);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:72px;padding-bottom:80px}
.section-head{margin-bottom:32px}
.section-head h2{margin:0 0 16px}
.section-head p{max-width:760px;color:var(--text-muted)}
.grid{display:grid;gap:24px}
.grid>*{min-width:0}
.grid-three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-two{grid-template-columns:repeat(2,minmax(0,1fr))}
.stack{display:grid;gap:20px;min-width:0}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.no-break{white-space:nowrap}
.tone{color:var(--hot)}
.skip{position:absolute;left:12px;top:-60px;z-index:100;padding:8px 14px;background:var(--text);color:var(--on-ink);font-size:var(--size-small);text-decoration:none}
.skip:focus{top:12px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.icon{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.panel{position:relative;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow-panel);overflow:hidden;min-width:0}
.card-pad{padding:24px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:10px 28px;border:1px solid var(--text);border-radius:var(--r-btn);font-size:var(--size-body);font-weight:var(--weight-bold);letter-spacing:.01em;text-decoration:none;line-height:1.5;flex-shrink:0;white-space:nowrap;transition:background-color var(--ease-quick),color var(--ease-quick),border-color var(--ease-quick)}
.btn svg{width:18px;height:18px}
.btn-solid,.btn-primary{background:var(--text);color:var(--on-ink);border-color:var(--text)}
.btn-solid:hover,.btn-primary:hover,.btn-demo-hover{background:var(--accent-dark);border-color:var(--accent-dark);color:var(--on-ink)}
.btn-line,.btn-secondary{background:var(--clear);color:var(--accent);border-color:var(--accent)}
.btn-line:hover,.btn-secondary:hover{background:var(--accent-a06)}
.btn:active{background:var(--accent);border-color:var(--accent);color:var(--on-ink)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--bg-panel-2);color:var(--text-muted);border-color:var(--border)}
.cta-row{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:28px}
.topbar{position:relative;z-index:40;height:var(--header-height);background:var(--bg);border-bottom:1px solid var(--border)}
.topbar-in{max-width:1280px;height:100%;margin:0 auto;padding:0 24px;display:flex;align-items:center;gap:24px;flex-wrap:nowrap}
.brand{display:flex;align-items:center;gap:10px;flex:none;text-decoration:none;color:var(--text);font-family:var(--font-display);font-weight:var(--weight-display);font-size:19px;letter-spacing:-.02em;min-height:28px}
.brand-mark{width:28px;height:28px;flex:none}
.brand-word b{font-weight:var(--weight-display);color:var(--accent)}
.mainnav{flex:1;min-width:0}
.topbar .topbar-in .mainnav > ul{display:flex;flex-wrap:nowrap;align-items:center;justify-content:center;list-style:none;margin:0;padding:0;gap:2px}
.mainnav li{min-width:0}
.mainnav a{display:flex;align-items:center;gap:6px;padding:8px 10px;border-radius:var(--r-card);font-size:var(--size-small);font-weight:var(--weight-medium);color:var(--text-muted);text-decoration:none;white-space:nowrap;transition:color var(--ease-quick),background-color var(--ease-quick)}
.mainnav a svg{width:16px;height:16px;flex:none}
.mainnav a:hover{color:var(--text);background:var(--accent-a06)}
.mainnav a[aria-current="page"]{color:var(--accent);font-weight:var(--weight-bold);background:var(--accent-a08)}
.tools{display:flex;align-items:center;gap:12px;flex-shrink:0}
.language{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;width:auto;height:36px;padding:0 8px;border:0;background:var(--clear);font-family:var(--font-body);font-size:var(--size-small);color:var(--text-muted);cursor:pointer}
.lang span{white-space:nowrap}
.lang svg{width:16px;height:16px}
.lang:hover{color:var(--text)}
.lang-panel{position:absolute;top:calc(100% + 10px);right:0;z-index:65;min-width:180px;padding:6px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow-float)}
.lang-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;text-decoration:none;color:var(--text-muted);font-size:var(--size-small)}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--accent-a08);color:var(--accent)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:36px;min-width:64px;padding:0 16px;border:1px solid var(--text);border-radius:var(--r-btn);font-size:var(--size-small);font-weight:var(--weight-bold);color:var(--text);text-decoration:none;white-space:nowrap;transition:background-color var(--ease-quick),color var(--ease-quick)}
.btn-login svg{width:16px;height:16px}
.btn-login:hover{background:var(--text);color:var(--on-ink)}
.menu-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;border:1px solid var(--border);border-radius:var(--r-card);background:var(--bg-panel);color:var(--accent)}
.menu-toggle svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round}
.drawer{display:none}
.nav-veil{position:fixed;inset:var(--header-height) 0 0;z-index:25;border:0;background:var(--veil)}
html.nav-open{overflow:hidden}
.site-footer{border-top:1px solid var(--border);background:var(--bg-panel-2);padding-top:48px;padding-bottom:24px}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:48px}
.footer-brand p{max-width:340px;margin-top:16px;color:var(--text-muted);font-size:var(--size-small)}
.footer-title{margin:0 0 12px;font-size:var(--size-small);font-weight:var(--weight-heavy);color:var(--accent)}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px 16px}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:28px;font-size:var(--size-small);color:var(--text-muted);text-decoration:none}
.footer-links a:hover,.footer-languages a:hover,.footer-legal a:hover{color:var(--accent);text-decoration:underline}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:32px;padding-top:20px;border-top:1px solid var(--border)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px 24px;margin-top:20px;color:var(--text-muted);font-size:var(--size-tiny)}
.footer-legal{display:flex;flex-wrap:wrap;gap:16px}
.prose{max-width:820px;min-width:0;overflow-wrap:break-word}
.prose p,.prose ul,.prose ol,.prose pre,.prose blockquote{margin-bottom:20px}
.prose h2{margin-top:48px;margin-bottom:20px;font-size:32px}
.prose h3{margin-top:28px;margin-bottom:16px}
.prose ul{list-style:disc;padding-left:24px}
.prose ol{padding-left:24px}
.prose li+li{margin-top:8px}
code{font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere}
:not(pre)>code{background:var(--bg-panel-2);color:var(--accent-dark);border-radius:var(--r-tag);padding:2px 5px}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--bg-panel-2);border:1px solid var(--border);border-radius:var(--r-card);font-family:var(--font-mono);font-size:var(--size-small)}
pre code{white-space:pre;overflow-wrap:normal}
.reveal{transition:opacity var(--ease-reveal),transform var(--ease-reveal)}
.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%;min-height:48px;overflow:hidden;margin-top:24px;margin-bottom:24px}
#server-status>*{min-width:0;max-width:100%}
#server-status+*{margin-top:24px}
.decor-section{position:relative;overflow-x:clip}
@media(max-width:1200px){
  .mainnav a{padding:8px 7px}
  .topbar-in{gap:16px}
}
@media(max-width:1100px){
  .topbar-in{padding-inline:20px;gap:12px}
  .mainnav{display:none}
  .tools{margin-left:auto}
  .menu-toggle{display:inline-flex}
  .drawer{position:fixed;top:var(--header-height);left:0;right:0;z-index:35;height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));padding:16px var(--gutter) 32px;overflow-y:auto;overscroll-behavior:contain;background:var(--bg-panel)}
  .drawer:not([hidden]){display:block}
  .drawer ul{display:grid;gap:4px}
  .drawer a{display:flex;align-items:center;gap:12px;width:100%;min-height:44px;padding:10px 14px;text-decoration:none;color:var(--text-muted);border-radius:var(--r-card)}
  .drawer a:hover,.drawer a[aria-current]{background:var(--accent-a08);color:var(--accent)}
  .drawer svg{width:18px;height:18px}
  .drawer-languages{margin-top:20px;padding-top:16px;border-top:1px solid var(--border)}
}
@media(max-width:768px){
  :root{--size-h1:40px;--size-h2:32px;--gutter:20px}
  .grid-three,.grid-two{grid-template-columns:minmax(0,1fr)}
  .section{padding-top:48px;padding-bottom:56px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1/-1}
}
@media(max-width:640px){
  :root{--gutter:16px;--size-h1:34px;--size-h2:28px;--size-h3:21px}
  .no-break{white-space:normal}
  .topbar-in{padding-inline:16px;gap:8px}
  .brand{gap:6px;font-size:17px}
  .brand-mark{width:25px;height:25px}
  .tools{gap:4px;margin-left:auto}
  .lang{padding-inline:6px}
  .lang span{display:none}
  .btn-login{padding-inline:10px;min-width:54px}
  .btn-login svg{display:none}
  .btn{padding-inline:22px;max-width:100%}
  .tilt,.kw,.float-sticker{transform:none}
  .decor-section>*[aria-hidden="true"]{max-width:100%}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-brand{grid-column:auto}
  .prose h2{font-size: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}
}