:root{
  color-scheme:light;
  --c-bg:#E6E9F6;--c-bg-top:#EEF0FA;--c-bg-bottom:#DFE3F3;--c-panel:#F8F9FE;--c-groove:#D8DCF0;--c-border:#C5CBE4;
  --c-accent:#CBF22E;--c-accent-dark:#4E6B00;--c-accent-edge:rgba(78,107,0,.32);--c-mint:#BFF0D2;
  --c-ink:#13152C;--c-muted:#585E7C;--c-success:#1E9E66;--c-success-ring:rgba(30,158,102,.16);--c-warn:#B97A09;--c-warn-ring:rgba(185,122,9,.16);--c-error:#D03A4E;
  --c-violet:#7B61FF;--c-pink:#FF6FAE;--c-white:#FFFFFF;--c-white-soft:rgba(255,255,255,.42);--c-grid:rgba(19,21,44,.04);--c-ink-shadow:rgba(19,21,44,.06);--c-ink-soft:rgba(19,21,44,.08);--c-tint-shadow:rgba(123,97,255,.10);--c-tint-shadow-strong:rgba(123,97,255,.18);--c-veil:rgba(19,21,44,.28);--c-clear:transparent;
  --flag-hk:#DE2910;--flag-sg:#EF3340;--flag-us-red:#B22234;--flag-us-blue:#3C3B6E;--flag-jp:#BC002D;--flag-nl-red:#AE1C28;--flag-nl-blue:#21468B;--flag-au-blue:#012169;--flag-au-red:#C8102E;--flag-white:#FFFFFF;--flag-edge:rgba(19,21,44,.16);
  --f-display:'Inter','Noto Sans SC','Noto Sans JP','Noto Sans KR','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --f-body:'Inter','Noto Sans SC','Noto Sans JP','Noto Sans KR','PingFang SC','Hiragino Sans','Microsoft YaHei',system-ui,sans-serif;
  --f-mono:'JetBrains Mono',ui-monospace,'SFMono-Regular',Menlo,Consolas,monospace;
  --f-mono-zh:'JetBrains Mono','Noto Sans SC','PingFang SC','Microsoft YaHei',ui-monospace,monospace;
  --f-hand:'Kaiti SC','STKaiti','KaiTi','BiauKai','Noto Sans SC',cursive;
  --fs-micro:10.5px;--fs-xs:11px;--fs-caption:12px;--fs-small:13px;--fs-chip:13.5px;--fs-nav:14px;--fs-trust:14.5px;--fs-note:15px;--fs-body:16px;--fs-lede:19px;--fs-brand:21px;--fs-h3:24px;--fs-price:30px;--fs-h2:clamp(28px,3.4vw,44px);--fs-display:clamp(52px,4.7vw,68px);--fs-cover:52px;
  --fw-normal:400;--fw-medium:500;--fw-semibold:600;--fw-bold:700;--fw-heavy:800;--fw-display:900;
  --r-xs:4px;--r-sm:6px;--r-row:8px;--r-md:10px;--r-nav:12px;--r-logo:11px;--r-tile:16px;--r-lg:18px;--r-blob:80px;--r-pill:999px;--r-circle:50%;
  --sh-chip:inset 0 1px 0 var(--c-white),0 6px 14px -8px var(--c-tint-shadow-strong);
  --sh-soft:inset 0 1px 0 var(--c-white),0 1px 2px var(--c-ink-shadow),0 14px 30px -14px var(--c-tint-shadow-strong);
  --sh-panel:inset 0 1px 0 var(--c-white),0 1px 2px var(--c-ink-shadow),0 30px 60px -18px var(--c-tint-shadow),0 14px 28px -14px var(--c-tint-shadow);
  --sh-float:inset 0 1px 0 var(--c-white-soft),0 18px 34px -12px var(--c-tint-shadow-strong),0 4px 10px -4px var(--c-ink-soft);
  --sh-button:inset 0 0 0 1px var(--c-accent-edge),0 10px 20px -10px var(--c-accent-edge);
  --grid-size:48px;--gutter:24px;--wrap:1200px;--header-height:68px;--toc-offset:84px;--anchor-offset:160px;--ease:ease;--speed:.2s;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:84px;scroll-behavior:smooth}
body{font-family:var(--f-body);font-size:var(--fs-body);font-weight:var(--fw-normal);color:var(--c-ink);line-height:1.65;background-color:var(--c-bg);background-image:linear-gradient(var(--c-grid) 1px,var(--c-clear) 1px),linear-gradient(90deg,var(--c-grid) 1px,var(--c-clear) 1px);background-size:var(--grid-size) var(--grid-size);-webkit-font-smoothing:antialiased;overflow-x:clip}
a{color:inherit;text-underline-offset:4px}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button,a,input,summary{touch-action:manipulation}
button{border:0}
img{max-width:100%;height:auto}
svg{flex-shrink:0}
ul{list-style:none}
h1,h2,h3,h4{font-family:var(--f-display);color:var(--c-ink);text-wrap:balance}
h1{font-size:var(--fs-display);line-height:1.1;letter-spacing:-.02em;font-weight:var(--fw-display)}
h2{font-size:var(--fs-h2);line-height:1.15;letter-spacing:-.02em;font-weight:var(--fw-display)}
h3{font-size:var(--fs-h3);line-height:1.3;font-weight:var(--fw-heavy)}
p{overflow-wrap:break-word}
code{font-family:var(--f-mono);overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--c-groove);border:1px solid var(--c-border);border-radius:var(--r-md)}
pre code{overflow-wrap:normal;white-space:pre}
:focus-visible{outline:2px solid var(--c-violet);outline-offset:3px;border-radius:var(--r-sm)}
[hidden]{display:none!important}
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:64px;padding-bottom:64px}
.stack>*+*{margin-top:20px}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid>*,.board>*,.footer-grid>*{min-width:0}
.no-break{white-space:nowrap}
.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.skip{position:absolute;left:16px;top:-60px;z-index:100;padding:10px 16px;background:var(--c-ink);color:var(--c-panel);border-radius:var(--r-sm);text-decoration:none;font-size:var(--fs-nav)}
.skip:focus{top:12px}
.panel,.card{min-width:0;background:var(--c-panel);border:1px solid var(--c-border);border-radius:var(--r-md);box-shadow:var(--sh-panel);padding:24px}
.btn,.btn-primary,.btn-secondary,.btn-go,.btn-line,.btn-login{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:46px;padding:10px 24px;border-radius:var(--r-pill);font-weight:var(--fw-bold);font-size:var(--fs-body);line-height:1.4;text-decoration:none;white-space:nowrap;flex-shrink:0;border:1px solid var(--c-clear);transition:transform var(--speed) var(--ease),background-color var(--speed) var(--ease)}
.btn-primary,.btn-go,.btn-login{background:var(--c-accent);color:var(--c-ink);box-shadow:var(--sh-button)}
.btn-secondary,.btn-line{background:var(--c-clear);border:1.5px solid var(--c-ink);color:var(--c-ink)}
.btn-primary:hover,.btn-go:hover,.btn-login:hover{transform:translateY(-1px)}
.btn-secondary:hover,.btn-line:hover{background:var(--c-panel)}
.btn:active,.btn-primary:active,.btn-go:active{transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--c-groove);color:var(--c-muted);box-shadow:none;cursor:not-allowed}
.btn svg,.btn-go svg{width:18px;height:18px}
.btn-login{height:42px;min-height:42px;padding:0 18px 0 20px;font-size:var(--fs-trust);gap:8px}
.btn-login svg{width:16px;height:16px}
.btn-go{height:46px;padding:0 22px 0 24px;font-weight:var(--fw-heavy)}
.btn-line{height:58px;padding:0 28px}
.ico{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.topbar{position:relative;z-index:40}
.topbar-in{width:min(1376px,100%);margin:0 auto;padding:12px 32px;display:flex;align-items:center;gap:20px;min-height:var(--header-height);flex-wrap:nowrap}
.brand{flex:1 1 0;display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--c-ink);min-width:max-content}
.brand-mark{width:34px;height:34px;flex-shrink:0;border-radius:var(--r-logo);box-shadow:var(--sh-float)}
.brand-word{font-family:var(--f-display);font-weight:var(--fw-display);font-size:var(--fs-brand);letter-spacing:-.03em;line-height:1}
.tabs{flex:0 1 auto;min-width:0;background:var(--c-panel);border:1px solid var(--c-border);border-radius:var(--r-nav);box-shadow:var(--sh-soft)}
.tabs ul{display:flex;align-items:center;list-style:none;margin:0;padding:0 6px;gap:0}
.tab{position:relative;display:flex;align-items:center;height:44px;padding:0 13px;font-size:var(--fs-nav);font-weight:var(--fw-medium);color:var(--c-muted);text-decoration:none;white-space:nowrap;transition:color var(--speed)}
.tab:hover{color:var(--c-ink)}
.tab::after{content:"";position:absolute;left:13px;right:13px;bottom:6px;height:2px;border-radius:var(--r-xs);background:var(--c-ink);transform:scaleX(0);transition:transform .25s}
.tab:hover::after{transform:scaleX(.35)}
.tab.is-current{color:var(--c-ink);font-weight:var(--fw-bold)}
.tab.is-current::after{transform:scaleX(1)}
.top-actions{flex:1 0 auto;display:flex;justify-content:flex-end;align-items:center;gap:8px;min-width:max-content}
.language{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:40px;min-width:44px;width:auto;padding:0 12px;font:inherit;font-size:var(--fs-nav);font-weight:var(--fw-medium);color:var(--c-ink);background:var(--c-clear);border:1px solid var(--c-clear);border-radius:var(--r-pill);cursor:pointer}
.lang span{white-space:nowrap}
.lang:hover{background:var(--c-panel);border-color:var(--c-border)}
.lang svg{width:16px;height:16px;flex-shrink:0}
.language-panel{position:absolute;right:0;top:calc(100% + 8px);z-index:70;min-width:180px;padding:8px;background:var(--c-panel);border:1px solid var(--c-border);border-radius:var(--r-md);box-shadow:var(--sh-panel)}
.language-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;text-decoration:none;border-radius:var(--r-sm);font-size:var(--fs-nav)}
.language-panel a:hover,.language-panel a[aria-current]{background:var(--c-groove)}
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:4px;min-width:44px;min-height:44px;background:var(--c-panel);border:1px solid var(--c-border);border-radius:var(--r-md)}
.menu-line{display:block;width:20px;height:2px;background:currentColor}
.mobile-drawer{display:none}
.nav-veil{display:none}
html.nav-open{overflow:hidden}
.site-footer{border-top:1px solid var(--c-border);background:var(--c-groove);padding-top:48px;padding-bottom:24px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:32px}
.footer-brand p{margin-top:16px;max-width:32ch;color:var(--c-muted);font-size:var(--fs-nav)}
.footer-title{font-size:var(--fs-body);font-weight:var(--fw-bold);margin-bottom:12px}
.footer-links{display:grid;gap:4px}
.footer-links a{display:inline-flex;align-items:center;min-height:32px;font-size:var(--fs-nav);text-decoration:none}
.footer-links a:hover{text-decoration:underline}
.footer-bottom{margin-top:32px;padding-top:20px;border-top:1px solid var(--c-border);display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:var(--fs-small);color:var(--c-muted)}
.legal-links{display:flex;flex-wrap:wrap;gap:16px}
.legal-links a{display:inline-flex;align-items:center;min-height:24px}
.reveal{transition:opacity .35s ease,transform .35s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
[data-count]{display:inline-block;min-width:3ch;font-variant-numeric:tabular-nums;font-family:var(--f-mono)}
[data-tilt]{transform-style:preserve-3d}
#server-status{position:relative;display:block;min-height:160px;max-width:100%;overflow:hidden;margin-top:24px;margin-bottom:24px}
#server-status+*{margin-top:24px}
.decoration-zone{position:relative;overflow-x:clip}
.prose{min-width:0;max-width:78ch}
.prose p,.prose ul,.prose ol{margin-block:16px}
.prose ul{list-style:disc;padding-left:24px}
.prose ol{padding-left:24px}
.prose h2{margin-top:48px;margin-bottom:20px}
.prose h3{margin-top:28px;margin-bottom:12px}
.prose img{display:block}
@media(min-width:1151px) and (max-width:1300px){
  .topbar-in{padding-inline:24px;gap:12px}.tab{padding-inline:9px;font-size:var(--fs-small)}.tabs ul{gap:2px}.brand{flex:0 0 auto}.top-actions{flex:1 0 auto}
}
@media(max-width:1150px){
  .topbar-in{padding-inline:var(--gutter);gap:12px}.topbar .tabs{display:none}.top-actions{margin-left:auto;flex:0 0 auto}.menu-toggle{display:flex}
  .mobile-drawer{position:fixed;top:var(--header-height);left:0;right:0;z-index:42;height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain;background:var(--c-panel);border-top:1px solid var(--c-border);padding:16px var(--gutter)}
  .mobile-drawer:not([hidden]){display:block}
  .mobile-drawer a{display:flex;align-items:center;width:100%;min-height:48px;padding:12px 16px;border-bottom:1px solid var(--c-border);text-decoration:none}
  .mobile-drawer a[aria-current]{background:var(--c-groove);font-weight:var(--fw-bold)}
  .drawer-languages{margin-top:24px;border-top:1px solid var(--c-border)}
  .nav-veil:not([hidden]){display:block;position:fixed;inset:var(--header-height) 0 0;z-index:41;background:var(--c-veil)}
  .topbar{z-index:45}
}
@media(max-width:768px){
  :root{--fs-display:clamp(28px,5.2vw,40px);--gutter:20px}
  .grid{grid-template-columns:repeat(2,minmax(0,1fr))}.section{padding-top:40px;padding-bottom:40px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:640px){
  :root{--gutter:16px;--fs-brand:18px;--fs-h3:21px}
  .no-break{white-space:normal}.grid{grid-template-columns:minmax(0,1fr)}.tilt,.decorative-tilt{transform:none}.decoration-zone>*{max-width:100%}
  .topbar-in{gap:6px;padding-block:12px}.brand{gap:6px;flex:0 0 auto}.brand-mark{width:28px;height:28px}.top-actions{gap:2px;margin-left:auto}
  .lang{padding-inline:7px;font-size:var(--fs-caption)}.lang svg{display:none}.btn-login{min-height:40px;height:40px;padding-inline:12px;font-size:var(--fs-small)}.btn-login svg{display:none}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:24px}.panel,.card{padding:20px}.footer-bottom{flex-direction:column}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}*,*::before,*::after{transition-duration:0s!important;animation-duration:0s!important;animation-iteration-count:1!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}