:root{
  --bg:#F9F2E8;
  --bg-panel:#FFFCF7;
  --bg-panel-2:#F1E6D6;
  --border:#E6D9C6;
  --accent:#3E5A7A;
  --accent-dark:#1F2C3B;
  --accent-soft:#6A84A2;
  --accent-mist:#8FA4BC;
  --accent-haze:#C3CFDC;
  --text:#2A211B;
  --text-muted:#75685C;
  --text-faint:#9A8D80;
  --icon-gray:#8A7D70;
  --success:#3F8A5A;
  --warn:#C98A1A;
  --error:#B5402F;
  --apricot:#F6DDC6;
  --apricot-light:#F8E6D5;
  --apricot-deep:#F2CFAE;
  --cream:#FFFAF3;
  --rose-glow:#F1C6BA;
  --rose-glow-fade:rgba(241,198,186,0);
  --hl-block:#F6D7BC;
  --sky-blue:#BCD3E6;
  --sky-blue-deep:#A6C3DD;
  --sky-rose:#EDBDB2;
  --sky-peach:#F4CDA6;
  --sky-gold:#F6E0B5;
  --sun:#EFA07C;
  --cloud:rgba(255,250,243,.42);
  --ripple-light:rgba(255,250,243,.5);
  --ripple-dark:rgba(62,90,122,.28);
  --flag-red:#C5443B;
  --flag-blue:#2E4474;
  --flag-white:#FFFFFF;
  --flag-line:rgba(42,33,27,.14);
  --dot-red:#E39A8E;
  --dot-amber:#E8C27A;
  --dot-green:#9CC6A4;
  --capsule:rgba(31,44,59,.84);
  --capsule-text:#FBF4EA;
  --capsule-edge:rgba(255,250,243,.12);
  --chip-light:rgba(255,252,247,.88);
  --glass-white:rgba(255,252,247,.62);
  --hi-line:rgba(255,255,255,.9);
  --hi-soft:rgba(255,255,255,.38);
  --btn-hi:rgba(255,255,255,.14);
  --shadow-dusk:rgba(62,90,122,.12);
  --shadow-dusk-soft:rgba(62,90,122,.07);
  --shadow-ink:rgba(31,44,59,.32);
  --shadow-apricot:rgba(222,160,112,.34);
  --veil:rgba(31,44,59,.22);
  --clear:transparent;
  --radius-xl:24px;
  --radius-lg:18px;
  --radius-md:14px;
  --radius-sm:10px;
  --radius-focus:6px;
  --radius-fold:5px;
  --radius-pill:999px;
  --radius-round:50%;
  --font-display:'Iowan Old Style','Palatino Linotype','Book Antiqua',Georgia,'Songti SC','Noto Serif CJK SC','Source Han Serif SC',STSong,'Hiragino Mincho ProN','Yu Mincho','Nanum Myeongjo',serif;
  --font-body:'Inter','Noto Sans SC','PingFang SC','Hiragino Sans','Microsoft YaHei','Apple SD Gothic Neo','Malgun Gothic',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,'SFMono-Regular',Menlo,Consolas,monospace;
  --gutter:24px;
  --page-width:1248px;
  --header-height:64px;
  --anchor-offset:80px;
  --toc-offset:144px;
  --shadow-panel:inset 0 1px 0 var(--hi-line),0 24px 48px -18px var(--shadow-dusk),0 6px 16px -8px var(--shadow-dusk-soft);
  --shadow-window:inset 0 1px 0 var(--hi-line),inset 0 0 0 1px var(--hi-soft),0 60px 100px -40px var(--shadow-dusk),0 24px 48px -24px var(--shadow-dusk),0 2px 6px var(--shadow-dusk-soft);
  --paper-noise:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .16 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(%23n)'/%3E%3C/svg%3E");
}
*,*::before,*::after{box-sizing:border-box}
*{margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-offset);scroll-behavior:smooth}
body{font-family:var(--font-body);font-size:16px;line-height:1.6;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
body::after{content:"";position:fixed;inset:0;pointer-events:none;z-index:100;opacity:.03;background-image:var(--paper-noise)}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
button,a,summary{touch-action:manipulation}
button:disabled,[aria-disabled="true"]{cursor:not-allowed;opacity:.5}
img,video{max-width:100%;height:auto}
svg{flex-shrink:0}
ul{list-style:none}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:var(--radius-focus)}
::selection{background:var(--hl-block);color:var(--accent-dark)}
h1,h2,h3{font-family:var(--font-display);font-weight:400;text-wrap:balance;overflow-wrap:break-word}
h1{font-size:clamp(52px,4.6vw,64px);line-height:1.1;letter-spacing:-.02em}
h2{font-size:clamp(28px,3vw,40px);line-height:1.25}
h3{font-size:25px;line-height:1.3}
p{overflow-wrap:break-word}
code{font-family:var(--font-mono);font-size:.88em;overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:20px;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg-panel-2)}
pre code{overflow-wrap:normal;white-space:pre}
input,textarea,select{max-width:100%;min-width:0;padding:12px 16px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-md)}
input::placeholder,textarea::placeholder{color:var(--text-muted)}
.wrap{width:100%;max-width:var(--page-width);padding-inline:var(--gutter);margin-inline:auto}
.section{padding-top:80px;padding-bottom:80px}
.section-head{max-width:760px;margin-bottom:32px}
.section-head p{margin-top:16px;color:var(--text-muted)}
.center{text-align:center}
.center.section-head{margin-inline:auto}
.stack>*+*{margin-top:20px}
.grid{display:grid;gap:24px}
.grid>*{min-width:0}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.panel,.card{min-width:0;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-xl);box-shadow:var(--shadow-panel)}
.card{padding:28px}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.no-break{white-space:nowrap}
.kicker{font-size:12px;letter-spacing:.1em;color:var(--accent);margin-bottom:12px}
.prose{max-width:800px;min-width:0;margin-inline:auto}
.prose p,.prose ul,.prose ol,.prose pre,.prose blockquote{margin-block:20px}
.prose h2{margin-top:56px;margin-bottom:24px}
.prose h3{margin-top:32px;margin-bottom:16px}
.prose ul{list-style:disc;padding-left:24px}
.prose ol{padding-left:24px}
.prose li+li{margin-top:8px}
.prose a{color:var(--accent);text-decoration:underline;text-underline-offset:4px}
.prose section[id]{scroll-margin-top:var(--anchor-offset)}
body:has(.toc-tabs) section[id]{scroll-margin-top:var(--toc-offset)}
.btn,.btn-main,.btn-primary,.btn-ghost,.btn-secondary,.btn-login{display:inline-flex;align-items:center;justify-content:center;gap:10px;flex-shrink:0;min-height:44px;padding:11px 24px;border-radius:var(--radius-pill);font-size:16px;font-weight:500;line-height:1.5;text-align:center;white-space:nowrap;transition:background-color .2s,color .2s,border-color .2s,transform .2s}
.btn-main,.btn-primary{height:50px;padding:0 30px 0 24px;background:var(--accent-dark);color:var(--cream);box-shadow:inset 0 1px 0 var(--btn-hi),0 14px 28px -12px var(--shadow-ink),0 4px 10px -4px var(--shadow-dusk)}
.prose a.btn-primary{color:var(--cream);text-decoration:none}
.btn-main:hover,.btn-primary:hover,.is-hover.btn-primary{transform:translateY(-1px);background:var(--accent)}
.btn svg,.btn-main svg,.btn-primary svg{width:18px;height:18px}
.btn-ghost,.btn-secondary{height:50px;padding:0 26px;border:1px solid var(--border);background:var(--glass-white);box-shadow:inset 0 1px 0 var(--hi-line);color:var(--text)}
.btn-ghost:hover,.btn-secondary:hover{border-color:var(--accent);color:var(--accent)}
.btn-login{height:38px;min-height:38px;padding:0 20px;border:1px solid var(--accent-dark);font-size:14.5px;color:var(--accent-dark);background:var(--glass-white)}
.btn-login:hover{background:var(--accent-dark);color:var(--cream)}
.btn-primary:active,.btn-main:active{transform:translateY(1px)}
.is-focus{outline:2px solid var(--accent);outline-offset:3px}
.text-link{display:inline-flex;align-items:center;min-height:32px;color:var(--accent);text-decoration:underline;text-underline-offset:5px}
.topbar{position:relative;z-index:50;height:var(--header-height)}
.topbar>.wrap{max-width:1368px;height:100%;display:flex;align-items:center;flex-wrap:nowrap;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex:none;min-height:32px}
.brand-mark{width:30px;height:30px;flex:none;display:block}
.brand-en{font-family:var(--font-display);font-size:22px;line-height:1;letter-spacing:-.01em;color:var(--text)}
.brand-zh{font-size:13px;line-height:1;color:var(--text-muted);padding-left:10px;border-left:1px solid var(--border)}
.nav{flex:1;min-width:0;display:flex;justify-content:center}
.nav-list{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:6px}
.nav-link{display:inline-flex;align-items:center;justify-content:center;gap:4px;min-height:36px;padding:0 14px;border-radius:var(--radius-pill);font-size:14.5px;color:var(--text);opacity:.86;white-space:nowrap;transition:background-color .2s,opacity .2s}
.nav-link:hover{opacity:1;background:var(--glass-white)}
.nav-link[aria-current="page"],.menu-link[aria-current="page"]{opacity:1;color:var(--accent);background:var(--glass-white)}
.nav-caret{font-size:11px;color:var(--text-muted)}
.more{position:relative}
.more-menu{position:absolute;top:calc(100% + 10px);left:50%;min-width:220px;padding:10px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-panel);z-index:60;display:none;transform:translateX(-50%)}
.more-menu::before{content:"";position:absolute;inset:-12px 0 auto;height:12px}
.more:hover .more-menu,.more:focus-within .more-menu,.more.is-open .more-menu{display:block}
.menu-group+.menu-group{margin-top:6px;padding-top:6px;border-top:1px solid var(--bg-panel-2)}
.menu-label{display:block;padding:4px 10px;font-size:11.5px;letter-spacing:.08em;color:var(--text-muted)}
.menu-link{display:flex;align-items:center;min-height:36px;padding:7px 10px;border-radius:var(--radius-sm);font-size:14px;color:var(--text)}
.menu-link:hover{background:var(--bg-panel-2);color:var(--accent)}
.actions{display:flex;align-items:center;gap:14px;flex-shrink:0;margin-left:auto}
.language{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;min-height:36px;width:auto;padding:0 6px;font-size:14px;color:var(--text-muted);white-space:nowrap}
.lang span{white-space:nowrap}
.lang svg{width:16px;height:16px}
.lang:hover{color:var(--accent)}
.language-panel{position:absolute;right:0;top:calc(100% + 12px);z-index:70;min-width:180px;padding:8px;display:none;border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--bg-panel);box-shadow:var(--shadow-panel)}
.language.is-open .language-panel{display:block}
.language-panel a{display:flex;align-items:center;min-height:40px;padding:8px 12px;border-radius:var(--radius-sm)}
.language-panel a:hover,.language-panel a[aria-current="true"]{background:var(--bg-panel-2);color:var(--accent)}
.actions-sep{width:1px;height:18px;background:var(--border)}
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:4px;min-width:44px;min-height:44px;color:var(--accent-dark);border-radius:var(--radius-sm)}
.menu-stroke{display:block;width:20px;height:2px;background:currentColor}
.mobile-drawer{display:none;position:fixed;top:var(--header-height);inset-inline:0;z-index:45;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);border-top:1px solid var(--border)}
.mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px 16px;border-radius:var(--radius-sm)}
.mobile-drawer a:hover,.mobile-drawer a[aria-current="page"],.mobile-drawer a[aria-current="true"]{color:var(--accent);background:var(--bg-panel-2)}
.drawer-languages{margin-top:20px;padding-top:16px;border-top:1px solid var(--border)}
.nav-veil{display:none;position:fixed;top:var(--header-height);inset-inline:0;bottom:0;background:var(--veil);z-index:40}
html.nav-open{overflow:hidden}
.footer{padding-top:64px;padding-bottom:28px;border-top:1px solid var(--border);background:var(--bg-panel-2)}
.footer-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:48px}
.footer-grid>*{min-width:0}
.footer-brand p{max-width:320px;margin-top:20px;color:var(--text-muted);font-size:14px}
.footer-title{font-family:var(--font-body);font-size:14px;font-weight:600;margin-bottom:12px}
.footer-links{display:flex;flex-wrap:wrap;gap:4px 18px}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:32px;font-size:14px}
.footer-links a:hover,.footer-languages a:hover,.footer-legal a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:4px}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 24px;margin-top:40px;padding-top:20px;border-top:1px solid var(--border)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;margin-top:24px;color:var(--text-muted);font-size:13px}
.footer-legal{display:flex;flex-wrap:wrap;gap:20px}
.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;min-height:120px;max-width:100%;overflow:hidden;margin-block:24px}
#server-status>*{min-width:0;max-width:100%}
#server-status+*{margin-top:32px}
@media(max-width:1180px){
  .nav-link{padding-inline:10px}
  .topbar>.wrap{gap:16px}
}
@media(max-width:980px){
  .brand-zh{display:none}
  .nav-link{font-size:13px;padding-inline:8px}
  .actions{gap:8px}
}
@media(max-width:768px){
  :root{--gutter:20px}
  h1{font-size:clamp(28px,5.2vw,40px)}
  .section{padding-top:48px;padding-bottom:48px}
  .grid-2,.grid-3{grid-template-columns:minmax(0,1fr)}
  .nav,.actions-sep{display:none}
  .topbar>.wrap{gap:8px;justify-content:space-between}
  .actions{margin-left:auto;gap:5px}
  .menu-toggle{display:flex}
  html.nav-open .mobile-drawer{display:block}
  html.nav-open .nav-veil{display:block}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:32px}
  .btn-main,.btn-primary,.btn-ghost,.btn-secondary{height:46px;font-size:15px}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .no-break{white-space:normal}
  .tilt,.float-refund,.float-pay{transform:none}
  .stage,.decoration-region{max-width:100%;overflow-x:clip}
  .brand-en{font-size:20px}
  .brand{gap:7px}
  .brand-mark{width:26px;height:26px}
  .btn-login{padding-inline:13px;font-size:13px}
  .lang{font-size:11px;padding-inline:3px;gap:3px}
  .lang svg{width:14px;height:14px}
  .card{padding:22px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}