:root{
  --bg:#EAEBF8;
  --bg-panel:#F8F8FE;
  --bg-panel-2:#DEE0F3;
  --border:#CFD2EA;
  --border-soft:rgba(207,210,234,.72);
  --accent:#F0427A;
  --accent-soft:#F7678F;
  --accent-dark:#C42A5E;
  --indigo:#4338F0;
  --text:#16162A;
  --text-muted:#5A5D78;
  --text-faint:#8C8FAB;
  --success:#14A06B;
  --warn:#D98A0B;
  --error:#D93A3A;
  --on-dark:#FFFFFF;
  --on-dark-soft:rgba(255,255,255,.80);
  --on-dark-dim:rgba(255,255,255,.50);
  --on-dark-faint:rgba(255,255,255,.14);
  --hero-top:#F3F3FC;
  --hero-bottom:#E4E6F6;
  --glow-plum:rgba(240,66,122,.20);
  --glow-peach:rgba(255,178,140,.40);
  --sidebar-wash:rgba(255,244,248,.84);
  --tile-wash:rgba(255,255,255,.60);
  --indigo-tint:rgba(67,56,240,.08);
  --indigo-tint-2:rgba(67,56,240,.13);
  --indigo-ring:rgba(67,56,240,.22);
  --success-ring:rgba(20,160,107,.18);
  --shade-tint:rgba(67,56,240,.12);
  --shade-tint-soft:rgba(67,56,240,.07);
  --shade-ink:rgba(22,22,42,.08);
  --shade-cta:rgba(22,22,42,.40);
  --frame-edge:rgba(196,42,94,.30);
  --highlight:rgba(255,255,255,.55);
  --highlight-strong:rgba(255,255,255,.92);
  --light-edge:rgba(22,22,42,.12);
  --mask-ink:#000000;
  --veil:rgba(22,22,42,.38);
  --flag-hk:#DE2910;
  --flag-us-red:#B22234;
  --flag-us-blue:#3C3B6E;
  --flag-sg:#EF3340;
  --flag-jp:#BC002D;
  --flag-nl-red:#AE1C28;
  --flag-nl-blue:#21468B;
  --flag-white:#FFFFFF;
  --flag-edge:rgba(22,22,42,.16);
  --font-display:Georgia,"Iowan Old Style","Songti SC",STSong,"Source Han Serif SC","Noto Serif CJK SC","Hiragino Mincho ProN","Nanum Myeongjo",serif;
  --font-body:Inter,"Noto Sans SC","Noto Sans JP","Noto Sans KR","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --text-xs:.75rem;
  --text-sm:.875rem;
  --text-base:1rem;
  --text-lead:1.125rem;
  --text-h3:1.375rem;
  --text-h2:clamp(1.75rem,3vw,2.5rem);
  --text-h1:clamp(3.25rem,4.45vw,4rem);
  --r-xs:6px;
  --r-sm:8px;
  --r-logo:9px;
  --r-md:10px;
  --r-tile:13px;
  --r-lg:14px;
  --r-xl:18px;
  --r-pill:999px;
  --r-round:50%;
  --gutter:24px;
  --page-width:1200px;
  --reading-width:800px;
  --header-height:72px;
  --anchor-space:88px;
  --toc-space:152px;
  --space-section:80px;
  --ease: cubic-bezier(.2,.7,.3,1);
  --time-fast:.2s;
  --time-reveal:.35s;
  --panel-shadow:inset 0 1px 0 var(--highlight-strong),0 20px 56px -24px var(--shade-tint);
  --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='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23g)'/%3E%3C/svg%3E");
  --grain-soft:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='s'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='1.1' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23s)' opacity='.07'/%3E%3C/svg%3E");
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-space);scroll-behavior:smooth}
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}
a{color:var(--indigo);text-decoration-thickness:1px;text-underline-offset:4px}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
img{max-width:100%;height:auto;vertical-align:middle}
svg{flex-shrink:0}
h1,h2,h3{line-height:1.2;text-wrap:balance;overflow-wrap:break-word}
h1{font-family:var(--font-display);font-size:var(--text-h1);font-weight:700;letter-spacing:-.02em}
h2{font-size:var(--text-h2);letter-spacing:-.015em}
h3{font-size:var(--text-h3)}
p{margin:0 0 1em}
ul,ol{padding-inline-start:1.4em}
li+li{margin-top:.35em}
header ul,footer ul{list-style:none;margin:0;padding:0}
header li+li,footer li+li{margin-top:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:var(--r-xs)}
[hidden]{display:none!important}
.wrap{width:100%;max-width:var(--page-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:var(--space-section);padding-bottom:var(--space-section)}
.grid{display:grid;gap:24px}
.grid>*{min-width:0}
.flex-row{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono)}
.no-break{white-space:nowrap}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.panel,.card{min-width:0;padding:28px;border:1px solid var(--border-soft);border-radius:var(--r-lg);background:var(--bg-panel);box-shadow:var(--panel-shadow)}
.panel-inset{padding:20px;background:var(--bg-panel-2);border-radius:var(--r-md)}
.prose{overflow-wrap:break-word}
.prose h2{margin-top:2em}
.prose h3{margin-top:1.5em}
.prose p,.prose li{line-height:1.85}
.prose a{overflow-wrap:anywhere}
code{font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere;background:var(--bg-panel-2);border-radius:var(--r-xs);padding:.12em .3em}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--text);color:var(--on-dark);border-radius:var(--r-md);line-height:1.7}
pre code{background:none;padding:0;color:inherit;white-space:pre;overflow-wrap:normal}
blockquote{margin-inline:0}
.reveal{transition:opacity var(--time-reveal) var(--ease),transform var(--time-reveal) var(--ease)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
[data-counter]{display:inline-block;min-width:3ch;font-family:var(--font-mono);font-variant-numeric:tabular-nums;text-align:end}
#server-status{position:relative;display:block;min-width:0;min-height:12rem;max-width:100%;overflow:hidden;margin-block:24px}
#server-status+*{margin-top:24px}
#server-status>*{min-width:0;max-width:100%}

/* Shared navigation, with a separately layered mobile drawer. */
#site-header{position:relative;z-index:50}
.topband{position:relative;z-index:10;height:var(--header-height);background:var(--indigo);color:var(--on-dark);-webkit-mask:linear-gradient(var(--mask-ink) 0 0) top/100% calc(100% - 8px) no-repeat,radial-gradient(circle at 50% 0,var(--mask-ink) 7px,transparent 7.5px) bottom/14px 8px repeat-x;mask:linear-gradient(var(--mask-ink) 0 0) top/100% calc(100% - 8px) no-repeat,radial-gradient(circle at 50% 0,var(--mask-ink) 7px,transparent 7.5px) bottom/14px 8px repeat-x}
.topband::before,.manifesto::before{content:"";position:absolute;inset:0;pointer-events:none;background:var(--grain);background-size:180px 180px;mix-blend-mode:overlay;opacity:.08}
.topband-inner{position:relative;max-width:1280px;height:64px;margin:0 auto;padding:0 40px;display:flex;align-items:center;gap:40px;flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:19px;letter-spacing:-.01em;flex-shrink:0;color:inherit;text-decoration:none}
.brand img{width:32px;height:32px;flex-shrink:0;border-radius:var(--r-logo)}
.brand-zh{font-size:var(--text-sm);font-weight:500;color:var(--on-dark-soft)}
.desktop-nav{flex:1;min-width:0}
.nav-list{display:flex;align-items:center;list-style:none;margin:0;padding:0;font-size:15px;font-weight:600;white-space:nowrap}
.nav-list li{display:flex;align-items:center}
.nav-list li+li::before{content:"·";margin:0 13px;color:var(--on-dark-dim);font-weight:700}
.nav-list a{color:var(--on-dark-soft);padding:6px 0;text-decoration:none}
.nav-list a:hover{color:var(--on-dark)}
.nav-list a[aria-current="page"]{color:var(--on-dark);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:7px}
.band-actions{margin-left:auto;display:flex;align-items:center;gap:18px;flex-shrink:0}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:36px;min-width:44px;width:auto;padding:6px 4px;border:0;background:none;cursor:pointer;font-size:14px;color:var(--on-dark-soft);white-space:nowrap}
.lang span{white-space:nowrap}
.lang svg{width:16px;height:16px}
.lang:hover{color:var(--on-dark)}
.login{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:36px;padding:0 16px 0 12px;border-radius:var(--r-pill);background:var(--bg-panel);color:var(--indigo);font-size:14px;font-weight:700;text-decoration:none;white-space:nowrap;box-shadow:inset 0 -2px 0 var(--indigo-tint-2),0 6px 14px -6px var(--shade-cta);transition:transform var(--time-fast)}
.login svg{width:16px;height:16px}
.login:hover{transform:translateY(-1px)}
.language-panel{position:absolute;z-index:60;right:max(24px,calc((100% - 1200px)/2));top:64px;min-width:180px;padding:8px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--panel-shadow)}
.language-panel a{display:flex;align-items:center;min-height:44px;padding:8px 14px;color:var(--text);text-decoration:none;border-radius:var(--r-xs)}
.language-panel a:hover,.language-panel a[aria-current]{background:var(--indigo-tint);color:var(--indigo)}
.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(--on-dark-faint);border-radius:var(--r-sm);background:none;color:var(--on-dark)}
.menu-line{display:block;width:20px;height:2px;background:currentColor}
.nav-drawer{display:none;position:fixed;top:var(--header-height);inset-inline:0;z-index:40;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);color:var(--text)}
.nav-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px 16px;text-decoration:none;border-radius:var(--r-sm);color:var(--text)}
.nav-drawer a:hover,.nav-drawer a[aria-current]{background:var(--indigo-tint);color:var(--indigo)}
.drawer-languages{display:grid;border-top:1px solid var(--border);margin-top:16px;padding-top:16px}
.nav-veil{position:fixed;z-index:30;top:var(--header-height);bottom:0;inset-inline:0;background:var(--veil);border:0}
html.nav-open{overflow:hidden}

/* Shared buttons. */
.btn,.btn-primary,.btn-secondary{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;white-space:nowrap;text-decoration:none;cursor:pointer}
.btn{min-height:44px;padding:10px 20px;border:1px solid var(--border);border-radius:var(--r-md);background:var(--bg-panel);font-size:var(--text-sm);font-weight:600;color:var(--text);box-shadow:inset 0 1px 0 var(--highlight-strong)}
.btn:hover{background:var(--bg-panel-2)}
.btn:active,.btn-primary:active,.btn-secondary:active{transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;pointer-events:none}
.btn-primary{gap:14px;height:58px;padding:6px 22px 6px 6px;border:0;border-radius:var(--r-xl);background:var(--text);color:var(--on-dark);font-size:18px;font-weight:600;letter-spacing:.01em;box-shadow:inset 0 1px 0 var(--on-dark-faint),0 16px 28px -14px var(--shade-cta),0 2px 4px var(--shade-ink);transition:transform var(--time-fast)}
.btn-tile{display:inline-grid;place-items:center;width:46px;height:46px;border-radius:var(--r-tile);background:var(--bg-panel);box-shadow:inset 0 -1px 0 var(--border-soft)}
.btn-tile img{width:30px;height:30px;border-radius:var(--r-sm)}
.btn-arrow{width:20px;height:20px;color:var(--on-dark-soft)}
.btn-secondary{height:58px;padding:0 28px;border:0;border-radius:var(--r-xl);background:var(--bg-panel);color:var(--text);font-size:17px;font-weight:600;box-shadow:inset 0 0 0 1px var(--border),inset 0 1px 0 var(--highlight-strong),0 10px 22px -14px var(--shade-tint);transition:transform var(--time-fast)}
.btn-primary:hover,.btn-secondary:hover{transform:translateY(-2px)}
.cta-row{display:flex;justify-content:center;align-items:center;gap:14px;margin-bottom:20px}

/* Shared footer. */
.site-footer{padding-top:64px;padding-bottom:28px;background:var(--bg-panel-2);border-top:1px solid var(--highlight-strong)}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1.2fr;gap:48px}
.footer-brand .brand{color:var(--text)}
.footer-brand p{max-width:32em;margin-top:16px;color:var(--text-muted);font-size:var(--text-sm)}
.footer-title{font-size:var(--text-sm);font-weight:700;margin:0 0 14px}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px 20px}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:32px;color:var(--text-muted);font-size:var(--text-sm);text-decoration:none}
.footer-links a:hover,.footer-languages a:hover,.footer-legal a:hover{color:var(--indigo);text-decoration:underline}
.footer-languages{display:flex;gap:8px 24px;flex-wrap:wrap;margin-top:32px;padding-block:16px;border-block:1px solid var(--border)}
.footer-languages a[aria-current]{color:var(--indigo);font-weight:600}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:20px;font-size:var(--text-xs);color:var(--text-muted)}
.footer-legal{display:flex;gap:20px}
@media(min-width:981px){
  html.nav-open{overflow:auto}
}
@media(max-width:1240px){
  .topband-inner{gap:26px;padding:0 28px}
  .nav-list li+li::before{margin:0 9px}
}
@media(max-width:1180px){
  .topband-inner{gap:18px}
  .nav-list{font-size:var(--text-sm)}
  .band-actions{gap:10px}
}
@media(max-width:1100px){
  .desktop-nav{display:none}
  .menu-toggle{display:inline-flex}
  .band-actions{margin-left:auto}
  .nav-drawer:not([hidden]){display:block}
}
@media(max-width:768px){
  h1{font-size:clamp(1.75rem,5vw,2.5rem)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}
}
@media(max-width:640px){
  :root{--gutter:16px;--space-section:48px}
  .no-break{white-space:normal}
  .wrap,.reading-wrap{padding-inline:var(--gutter)}
  .tilt,.float--refund,.float--pay{transform:none}
  [data-hero-visual],.decoration{max-width:100%}
  .topband-inner{padding:0 16px;gap:8px}
  .brand{font-size:16px;gap:7px}
  .brand img{width:28px;height:28px}
  .band-actions{gap:5px;margin-left:auto}
  .lang{font-size:11px;gap:3px}
  .lang svg{width:13px;height:13px}
  .login{padding-inline:12px;font-size:12px}
  .login svg{display:none}
  .menu-toggle{padding:8px}
  .language-panel{right:16px}
  .panel,.card{padding:20px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-brand{grid-column:auto}
  .footer-links{gap:4px 16px}
}
@media(max-width:350px){
  .topband-inner{padding-inline:12px}
  .brand{font-size:14px;gap:5px}
  .brand img{width:24px;height:24px}
  .band-actions{gap:2px}
  .login{padding-inline:9px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none;transition:none}
  .btn,.btn-primary,.btn-secondary,.login{transition:none}
}