:root{
  --bg:#FAF1E8;--bg-panel:#FFFBF6;--bg-panel-2:#F2E6D8;--border:#E4D5C4;--border-soft:#EDE1D3;
  --accent:#9A2E9E;--accent-2:#B84AB0;--accent-dark:#6F1F73;--text:#2A1F1A;--text-muted:#6E5E52;
  --success:#2E7D4F;--warn:#B7791F;--error:#C0392B;--white:#FFFFFF;--clear:transparent;
  --hero-top:#FCF6EF;--hero-bottom:#F4E8DB;--plate-top:#F1E3EE;--plate-bottom:#EBD6E6;
  --accent-a04:rgba(154,46,158,.04);--accent-a06:rgba(154,46,158,.06);--accent-a08:rgba(154,46,158,.08);
  --accent-a12:rgba(154,46,158,.12);--accent-a18:rgba(154,46,158,.18);--accent-a22:rgba(154,46,158,.22);
  --accent-a35:rgba(154,46,158,.35);--accent-a40:rgba(154,46,158,.40);--accent-dark-a30:rgba(111,31,115,.30);
  --text-a12:rgba(42,31,26,.12);--text-a18:rgba(42,31,26,.18);--veil:rgba(42,31,26,.34);
  --white-a16:rgba(255,255,255,.16);--white-a35:rgba(255,255,255,.35);--white-a60:rgba(255,255,255,.60);--white-a85:rgba(255,255,255,.85);
  --success-a18:rgba(46,125,79,.18);
  --flag-white:#FFFFFF;--flag-us-red:#B22234;--flag-us-navy:#3C3B6E;--flag-sg-red:#EF3340;--flag-jp-red:#BC002D;
  --flag-hk-red:#DE2910;--flag-nl-red:#AE1C28;--flag-nl-blue:#21468B;
  --font-display:'Inter','Noto Sans SC','PingFang SC','Hiragino Sans','Malgun Gothic','Microsoft YaHei',system-ui,sans-serif;
  --font-body:'Inter','Noto Sans SC','PingFang SC','Hiragino Sans','Malgun Gothic','Microsoft YaHei',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,'SFMono-Regular',Menlo,Consolas,monospace;
  --weight-regular:400;--weight-medium:500;--weight-semibold:600;--weight-bold:700;--weight-heavy:800;--weight-display:900;
  --text-xs:12px;--text-sm:14px;--text-base:16px;--text-lead:18px;--text-h3:22px;--text-h2:36px;
  --text-h1:66px;--text-h1-tablet:56px;--text-h1-mobile:38px;--text-brand:21px;
  --r:8px;--r-plate:14px;--r-pill:999px;--r-round:50%;--r-focus:4px;
  --gutter:32px;--content-width:1264px;--head-height:72px;--toc-height:64px;--anchor-offset:88px;--section-space:80px;
  --shadow-1:inset 0 1px 0 var(--white-a85),inset 0 0 0 1px var(--white-a35),0 24px 56px -32px var(--accent-a22);
  --shadow-2:0 0 0 1px var(--border-soft),0 2px 6px var(--accent-a06),0 34px 70px -26px var(--accent-a12),0 18px 36px -24px var(--accent-a12);
  --shadow-3:0 0 0 1px var(--border-soft),0 8px 18px -6px var(--accent-a12),0 28px 52px -16px var(--accent-a22);
  --shadow-card:0 0 0 1px var(--border-soft),0 1px 2px var(--accent-a06),0 16px 32px -18px var(--accent-a18);
  --ease:cubic-bezier(.2,.65,.3,1);--speed:.2s;--reveal-speed:.35s;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:var(--anchor-offset)}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--text-base);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
[hidden]{display:none!important}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button,a,summary{-webkit-tap-highlight-color:var(--accent-a12)}
button{border:0}
img{max-width:100%;height:auto;vertical-align:middle}
svg{vertical-align:middle;flex-shrink:0}
p,blockquote,figure{margin:0}
h1,h2,h3,h4{margin:0;font-family:var(--font-display);text-wrap:balance}
h1{font-size:clamp(52px,4.6vw,72px);font-weight:var(--weight-display);line-height:1.12;letter-spacing:-.02em}
h2{font-size:var(--text-h2);font-weight:var(--weight-display);line-height:1.2;letter-spacing:-.02em}
h3{font-size:var(--text-h3);font-weight:var(--weight-heavy);line-height:1.35}
ul,ol{padding-left:1.5em}
:focus-visible{outline:2px solid var(--accent-dark);outline-offset:3px;border-radius:var(--r-focus)}
::selection{background:var(--accent-a18);color:var(--text)}
.no-break{white-space:nowrap}
.wrap{width:100%;max-width:var(--content-width);margin-inline:auto;padding-inline:var(--gutter)}
.wrap>*{min-width:0}
.section{padding-top:var(--section-space);padding-bottom:var(--section-space)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head p{margin-top:20px;color:var(--text-muted);font-size:var(--text-lead)}
.stack{display:grid;gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid-3>*{min-width:0}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.text-link{color:var(--accent-dark);text-decoration:underline;text-underline-offset:4px}
.panel,.card{padding:24px;border-radius:var(--r);background:var(--bg-panel);box-shadow:var(--shadow-card)}
.panel{box-shadow:var(--shadow-2)}
.prose{max-width:800px;min-width:0;overflow-wrap:break-word}
.prose p,.prose ul,.prose ol,.prose blockquote,.prose pre{margin-block:20px}
.prose h2{margin-top:48px;margin-bottom:20px}
.prose h3{margin-top:32px;margin-bottom:16px}
.prose a:not(.btn){color:var(--accent-dark);text-decoration:underline;text-underline-offset:3px}
code{font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--bg-panel-2);border-radius:var(--r)}
pre code{white-space:pre;overflow-wrap:normal}
.skip{position:absolute;left:16px;top:-80px;z-index:100;padding:8px 14px;border-radius:var(--r);background:var(--text);color:var(--bg-panel);font-size:var(--text-sm);font-weight:var(--weight-semibold)}
.skip:focus{top:12px}
.svg-bank{position:absolute;width:0;height:0;overflow:hidden;pointer-events:none}
.grain{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:60;opacity:.03;mix-blend-mode:multiply}
.reveal{transition:opacity var(--reveal-speed) var(--ease),transform var(--reveal-speed) var(--ease)}
.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-block:24px}
#server-status+*{margin-top:24px}
.decoration-host{position:relative;overflow-x:clip;max-width:100%}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 28px;border-radius:var(--r);font-size:var(--text-base);font-weight:var(--weight-bold);white-space:nowrap;flex-shrink:0;cursor:pointer;transition:background-color var(--speed),color var(--speed),transform var(--speed)}
.btn svg{width:16px;height:16px;flex:none}
.btn-primary{background:var(--accent);color:var(--white);box-shadow:inset 0 1px 0 var(--white-a35),0 12px 26px -12px var(--accent-a40)}
.btn-primary:hover,.btn-primary.is-hover{background:var(--accent-dark);transform:translateY(-1px)}
.btn-primary:active{transform:none}
.btn-ghost,.btn-secondary{background:var(--bg-panel);color:var(--text);border:1.5px solid var(--text)}
.btn-ghost:hover,.btn-secondary:hover{background:var(--bg-panel-2)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--bg-panel-2);color:var(--text-muted);box-shadow:none;cursor:not-allowed;transform:none}
.btn.is-focus{outline:2px solid var(--accent-dark);outline-offset:3px}
.site-head{position:relative;z-index:50;height:var(--head-height);background:var(--hero-top);border-bottom:1px solid var(--border-soft)}
.site-head .wrap{display:flex;align-items:center;height:100%;gap:48px;flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none;font-family:var(--font-display);font-weight:var(--weight-display);font-size:var(--text-brand);letter-spacing:-.02em;color:var(--text);white-space:nowrap;min-height:44px}
.brand-mark{width:32px;height:32px;flex:none}
.brand-zh{font-size:var(--text-sm);font-weight:var(--weight-medium);color:var(--text-muted)}
.nav{display:flex;align-items:center;flex:1;min-width:0}
.nav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:30px}
.nav a{display:inline-flex;align-items:center;min-height:40px;padding:8px 0;font-size:14.5px;font-weight:var(--weight-medium);color:var(--text-muted);white-space:nowrap;transition:color var(--speed)}
.nav a:hover{color:var(--text)}
.nav a[aria-current="page"]{color:var(--text);font-weight:var(--weight-heavy)}
.head-right{margin-left:auto;display:flex;align-items:center;gap:12px;flex-shrink:0}
.lang-picker{position:relative;flex:none}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;width:auto;height:40px;padding:0 12px;border-radius:var(--r);font-size:var(--text-sm);font-weight:var(--weight-medium);color:var(--text-muted);background:var(--clear);white-space:nowrap;list-style:none}
.lang span{white-space:nowrap}
.lang:hover{background:var(--bg-panel-2);color:var(--text)}
.lang-panel{position:absolute;right:0;top:calc(100% + 10px);z-index:55;min-width:176px;padding:8px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow-3)}
.lang-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:var(--r);font-size:var(--text-sm);white-space:nowrap}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--bg-panel-2)}
.login{display:inline-flex;align-items:center;justify-content:center;height:40px;min-width:44px;padding:0 20px;border-radius:var(--r);background:var(--bg-panel);border:1.5px solid var(--text);font-size:var(--text-sm);font-weight:var(--weight-bold);white-space:nowrap;transition:background-color var(--speed),color var(--speed)}
.login:hover{background:var(--text);color:var(--bg-panel)}
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:4px;min-width:44px;min-height:44px;padding:10px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r);color:var(--text)}
.menu-line{display:block;width:20px;height:2px;background:currentColor}
.menu-toggle[aria-expanded="true"] .menu-line:first-child{transform:translateY(6px) 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(-6px) rotate(-45deg)}
.mobile-drawer{position:fixed;top:var(--head-height);right:0;left:0;z-index:49;height:calc(100dvh - var(--head-height));max-height:calc(100dvh - var(--head-height));overflow-y:auto;overscroll-behavior:contain;background:var(--bg-panel);padding:20px var(--gutter) 40px;border-bottom:1px solid var(--border)}
.mobile-drawer ul{list-style:none;margin:0;padding:0}
.mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px 8px;font-size:var(--text-base);border-bottom:1px solid var(--border-soft)}
.mobile-drawer a[aria-current]{font-weight:var(--weight-heavy)}
.drawer-languages{margin-top:24px;border-top:1px solid var(--border)}
.menu-veil{position:fixed;inset:var(--head-height) 0 0;z-index:48;background:var(--veil)}
html.nav-open{overflow:hidden}
.site-footer{background:var(--bg-panel-2);border-top:1px solid var(--border);padding-top:56px;padding-bottom:32px}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:40px}
.footer-grid>*{min-width:0}
.footer-brand p{margin-top:16px;max-width:320px;color:var(--text-muted);font-size:var(--text-sm)}
.footer-title{font-size:var(--text-base);font-weight:var(--weight-heavy);margin-bottom:16px}
.footer-links{display:grid;gap:4px;list-style:none;margin:0;padding:0}
.footer-links a{display:inline-flex;align-items:center;min-height:28px;font-size:var(--text-sm);color:var(--text-muted);overflow-wrap:anywhere}
.footer-links a:hover{color:var(--accent-dark);text-decoration:underline}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:40px;padding-top:24px;border-top:1px solid var(--border);font-size:var(--text-sm);color:var(--text-muted)}
.footer-legal{display:flex;gap:20px;flex-wrap:wrap}
.footer-legal a{display:inline-flex;align-items:center;min-height:28px}
@media(min-width:1061px) and (max-width:1320px){
  .site-head .wrap{gap:24px}.nav ul{gap:18px}.nav a{font-size:13px}.head-right{gap:8px}.lang{padding-inline:8px}
}
@media(max-width:1060px){
  .nav{display:none}.menu-toggle{display:inline-flex}.site-head .wrap{gap:16px}.head-right{margin-left:auto}
}
@media(min-width:1061px){
  .mobile-drawer,.menu-veil{display:none!important}html.nav-open{overflow:auto}
}
@media(max-width:768px){
  :root{--gutter:20px;--section-space:56px;--text-h2:30px}
  h1{font-size:var(--text-h1-mobile);line-height:1.14}
  .site-head .wrap{gap:12px}.lang{padding-inline:8px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .grid-3{grid-template-columns:1fr}.section-head{margin-bottom:28px}
}
@media(max-width:640px){
  .no-break{white-space:normal}
  .tilt,[data-tilt]{transform:none}
  .decoration-host>*{max-width:100%}
  .head-right{gap:4px;margin-left:auto}
  .brand{font-size:18px;gap:6px}.brand-mark{width:28px;height:28px}.login{padding-inline:10px}
  .lang{font-size:var(--text-xs);padding-inline:5px}.site-head .wrap{gap:6px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px 20px}.footer-brand{grid-column:1/-1}
  .btn{padding-inline:18px}
}
@media(max-width:359px){
  :root{--gutter:16px}.brand{font-size:16px}.brand-mark{width:24px;height:24px}.lang{font-size:11px}.login{padding-inline:8px}.head-right{gap:2px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:0s!important;animation:none!important}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none}
}