:root {
  --bg:#FBFBF9;
  --bg-clear:rgba(251,251,249,0);
  --panel:#FFFFFF;
  --panel-2:#F1F1EE;
  --border:#E2E2DD;
  --sep:#B8BDB6;
  --accent:#B4237E;
  --accent-dark:#6B2FC9;
  --honey:#FFC43D;
  --honey-shadow:rgba(224,155,0,.32);
  --text:#13231F;
  --text-hover:#20372F;
  --muted:#5D6966;
  --link:#5A6C88;
  --on-ink:#FFFFFF;
  --success:#1E9A56;
  --ok-ring:rgba(30,154,86,.22);
  --warn:#E09B00;
  --error:#D0392B;
  --win:#121815;
  --win-top:#161E1A;
  --win-2:#19211D;
  --win-3:#25302B;
  --win-panel:rgba(255,255,255,.022);
  --win-track:rgba(255,255,255,.08);
  --win-line:rgba(255,255,255,.08);
  --win-rim:rgba(255,255,255,.035);
  --win-edge:rgba(19,35,31,.55);
  --win-text:#F2F5F1;
  --win-muted:rgba(242,245,241,.62);
  --win-faint:rgba(242,245,241,.40);
  --wash-violet:rgba(107,47,201,.055);
  --wash-rose:rgba(180,35,126,.04);
  --shadow-rose-12:rgba(180,35,126,.12);
  --shadow-rose-16:rgba(180,35,126,.16);
  --ink-shadow:rgba(19,35,31,.22);
  --ink-shadow-soft:rgba(19,35,31,.08);
  --glow-rose:rgba(180,35,126,.30);
  --glow-violet:rgba(107,47,201,.20);
  --bar-glow:rgba(180,35,126,.38);
  --hl-white:rgba(255,255,255,.08);
  --hl-white-strong:rgba(255,255,255,.95);
  --hl-ink-btn:rgba(255,255,255,.14);
  --sel-rose:rgba(180,35,126,.40);
  --sel-violet:rgba(107,47,201,.18);
  --glass:rgba(255,255,255,.80);
  --glass-edge:rgba(255,255,255,.75);
  --focus:#6B2FC9;
  --flag-red:#D7263D;
  --flag-blue:#22408F;
  --flag-white:#FFFFFF;
  --flag-edge:rgba(19,35,31,.16);
  --clear:transparent;
  --font-display:"Inter","Noto Sans SC","Noto Sans JP","Noto Sans KR","PingFang SC","Hiragino Sans","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,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --r-xs:6px;
  --r:8px;
  --r-lg:12px;
  --r-pill:999px;
  --r-dot:50%;
  --r-tab:7px;
  --r-tab-inner:5px;
  --r-rule:2px;
  --r-bar:3px;
  --gutter:32px;
  --wrap-width:1280px;
  --reading-width:800px;
  --head-height:64px;
  --anchor-offset:80px;
  --toc-offset:88px;
  --space-1:8px;
  --space-2:16px;
  --space-3:24px;
  --space-4:32px;
  --space-6:48px;
  --space-8:64px;
  --space-12:96px;
  --size-body:16px;
  --size-small:14px;
  --size-h1:clamp(52px,5vw,64px);
  --size-h2:clamp(28px,3vw,40px);
  --size-h3:22px;
  --weight-body:400;
  --weight-medium:600;
  --weight-bold:700;
  --weight-brand:800;
  --weight-display:900;
  --ease-duration:.2s;
  --reveal-duration:.6s;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-offset);scroll-behavior:smooth}
html.nav-open{overflow:hidden}
body{margin:0;font-family:var(--font-body);font-size:var(--size-body);font-weight:var(--weight-body);color:var(--text);background-color:var(--bg);background-image:linear-gradient(180deg,var(--wash-violet) 0,var(--wash-rose) 280px,var(--bg-clear) 780px);background-repeat:no-repeat;-webkit-font-smoothing:antialiased;line-height:1.5}
a{color:inherit}
button,input,select,textarea{font:inherit}
button{color:inherit;cursor:pointer}
img{display:block;max-width:100%;height:auto}
svg{flex-shrink:0}
[hidden]{display:none!important}
:where(a,button,summary,input,select,textarea,[tabindex]):focus-visible{outline:2px solid var(--focus);outline-offset:3px;border-radius:var(--r-xs)}
h1,h2,h3{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;margin:0 0 var(--space-3)}
h2{font-size:var(--size-h2);font-weight:var(--weight-display);line-height:1.2;letter-spacing:-.02em;margin:0 0 var(--space-3)}
h3{font-size:var(--size-h3);font-weight:var(--weight-bold);line-height:1.35;margin:0 0 var(--space-2)}
p{margin:0 0 var(--space-2)}
code{font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere}
pre{max-width:100%;min-width:0;overflow-x:auto;padding:var(--space-3);background:var(--panel-2);border:1px solid var(--border);border-radius:var(--r)}
pre code{overflow-wrap:normal;white-space:pre}
.wrap{max-width:var(--wrap-width);margin:0 auto;padding-inline:var(--gutter)}
.reading-wrap{max-width:var(--reading-width);margin-inline:auto;padding-inline:var(--gutter)}
.sec{padding-top:var(--space-8);padding-bottom:var(--space-8)}
.prose{padding-top:0;padding-bottom:0;line-height:1.85;min-width:0;overflow-wrap:break-word}
.prose.wrap,.prose.reading-wrap{padding-inline:var(--gutter)}
.prose h2{margin-top:var(--space-6)}
.prose h3{margin-top:var(--space-4)}
.prose li+li{margin-top:var(--space-1)}
.prose a{color:var(--link);text-underline-offset:4px}
.prose section[id]{scroll-margin-top:var(--anchor-offset)}
:where(.grid,.panel-grid,.footer-grid)>*{min-width:0}
.panel{min-width:0;padding:var(--space-4);background:var(--panel);border:1px solid var(--border);border-radius:var(--r);box-shadow:inset 0 1px 0 var(--hl-white-strong),0 24px 64px -24px var(--shadow-rose-12)}
.panel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-3)}
.muted{color:var(--muted)}
.mono{font-family:var(--font-mono)}
.no-break{white-space:nowrap}
.text-link{display:inline-flex;align-items:center;min-height:24px;color:var(--link);font-weight:var(--weight-medium);text-decoration:none}
.text-link:hover{text-decoration:underline;text-underline-offset:4px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 24px;border:1px solid var(--clear);border-radius:var(--r);font-size:16px;font-weight:var(--weight-bold);text-decoration:none;flex-shrink:0;white-space:nowrap;transition:background-color var(--ease-duration),border-color var(--ease-duration),transform var(--ease-duration)}
.btn svg{width:16px;height:16px;flex:none}
.btn-primary{background:var(--text);color:var(--on-ink);box-shadow:inset 0 1px 0 var(--hl-ink-btn),0 12px 24px -14px var(--ink-shadow)}
.btn-primary:hover,.btn-primary.is-hover{background:var(--text-hover);transform:translateY(-1px)}
.btn-ghost,.btn-secondary{background:var(--panel);color:var(--text);border:1px solid var(--border);box-shadow:inset 0 1px 0 var(--hl-white-strong)}
.btn-ghost:hover,.btn-secondary:hover{border-color:var(--sep)}
.btn:active,.btn.is-active{transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--panel-2);color:var(--muted);box-shadow:none;cursor:not-allowed;transform:none}
.btn.is-focus{outline:2px solid var(--focus);outline-offset:3px}
.cta-row{display:flex;gap:12px;margin-bottom:16px}
.site-head,#site-header{position:relative;z-index:5}
.head-row{position:relative;height:var(--head-height);display:flex;align-items:center;gap:32px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex:none}
.brand-mark{width:28px;height:28px;flex:none}
.brand-word{font-family:var(--font-display);font-weight:var(--weight-brand);font-size:19px;letter-spacing:-.02em;color:var(--text)}
.brand-zh{font-weight:var(--weight-medium);color:var(--muted)}
.main-nav{flex:1;display:flex;justify-content:center;min-width:0}
.main-nav ul{list-style:none;margin:0;padding:0;display:flex;align-items:center;white-space:nowrap}
.main-nav li{display:flex;align-items:center}
.main-nav li+li::before{content:"·";color:var(--sep);font-weight:var(--weight-bold);margin:0 10px}
.main-nav a{position:relative;display:inline-block;min-height:24px;padding:6px 0;font-size:14px;color:var(--muted);text-decoration:none;transition:color var(--ease-duration)}
.main-nav a:hover{color:var(--text)}
.main-nav a[aria-current="page"]{color:var(--text);font-weight:var(--weight-medium)}
.main-nav a[aria-current="page"]::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:var(--r-rule);background:var(--text)}
.head-tools{display:flex;align-items:center;gap:8px;flex:none}
.lang{appearance:none;border:0;background:var(--clear);font:inherit;font-size:14px;color:var(--muted);display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;min-height:44px;width:auto;padding:8px 10px;border-radius:var(--r);cursor:pointer}
.lang-text{white-space:nowrap}
.lang:hover{background:var(--panel-2);color:var(--text)}
.lang svg{width:16px;height:16px;flex:none}
.language-box{position:relative}
.language-menu{position:absolute;right:0;top:100%;min-width:168px;padding:8px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r);box-shadow:0 16px 40px var(--ink-shadow-soft);z-index:8}
.language-menu a{display:flex;align-items:center;min-height:44px;padding:8px 12px;text-decoration:none;border-radius:var(--r-xs)}
.language-menu a:hover,.language-menu a[aria-current="true"]{background:var(--panel-2)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;height:36px;padding:0 18px;border-radius:var(--r);background:var(--text);color:var(--on-ink);font-size:14px;font-weight:var(--weight-medium);text-decoration:none;box-shadow:inset 0 1px 0 var(--hl-ink-btn);white-space:nowrap}
.btn-login:hover{background:var(--text-hover)}
.menu-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;border:1px solid var(--border);background:var(--panel);border-radius:var(--r)}
.menu-toggle svg{width:20px;height:20px}
.mobile-nav{display:none}
.nav-veil{position:fixed;inset:var(--head-height) 0 0;background:var(--ink-shadow);z-index:3;border:0}
.site-footer{margin-top:var(--space-8);border-top:1px solid var(--border);background:var(--panel-2);padding-top:var(--space-6);padding-bottom:var(--space-4)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:var(--space-4)}
.footer-brand p{margin-top:var(--space-2);color:var(--muted);max-width:30em}
.footer-title{font-size:14px;font-weight:var(--weight-bold);margin-bottom:var(--space-2)}
.footer-links{list-style:none;padding:0;margin:0;display:grid;gap:4px}
.footer-links a{display:inline-flex;align-items:center;min-height:28px;color:var(--link);text-decoration:none;font-size:14px}
.footer-links a:hover{text-decoration:underline}
.footer-bottom{margin-top:var(--space-4);padding-top:var(--space-3);border-top:1px solid var(--border);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:var(--space-2);color:var(--muted);font-size:13px}
.footer-legal{display:flex;flex-wrap:wrap;gap:var(--space-2)}
.footer-legal a{display:inline-flex;align-items:center;min-height:24px}
.reveal{transition:opacity var(--reveal-duration) ease,transform var(--reveal-duration) ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:relative;display:block;min-height:96px;min-width:0;max-width:100%;overflow:hidden;margin-top:var(--space-3);margin-bottom:var(--space-4)}
#server-status+*{margin-top:var(--space-4)}
#server-status :where(.grid,[class*="grid"]){min-width:0;max-width:100%}
#server-status :where(.grid,[class*="grid"])>*{min-width:0}
[data-parallax-decor],.decor-zone{pointer-events:none;max-width:100%}
.decor-zone{position:relative;overflow-x:clip}
[data-counter]{display:inline-block;min-width:3ch;font-variant-numeric:tabular-nums}
@media(max-width:1200px){
  .main-nav li+li::before{margin:0 7px}
  .main-nav a{font-size:13px}
}
@media(min-width:769px) and (max-width:1080px){
  .head-row{flex-wrap:wrap;height:auto;padding-top:12px;padding-bottom:8px;row-gap:4px}
  .head-tools{margin-left:auto}
  .main-nav{order:3;flex-basis:100%;justify-content:flex-start;overflow-x:auto}
}
@media(max-width:768px){
  :root{--gutter:20px;--size-h1:40px;--size-h2:28px}
  .head-row{gap:12px}
  .head-tools{margin-left:auto;gap:4px}
  .main-nav{display:none}
  .menu-toggle{display:inline-flex}
  .lang-text{display:none}
  .mobile-nav:not([hidden]){display:block;position:absolute;left:var(--gutter);right:var(--gutter);top:var(--head-height);z-index:7;background:var(--panel);border:1px solid var(--border);border-radius:var(--r);padding:8px;max-height:calc(100dvh - var(--head-height) - 16px);overflow-y:auto;overscroll-behavior:contain;box-shadow:0 24px 48px var(--ink-shadow-soft)}
  .mobile-nav a{display:flex;align-items:center;width:100%;min-height:44px;padding:10px 16px;text-decoration:none;border-radius:var(--r-xs)}
  .mobile-nav a:hover,.mobile-nav a[aria-current]{background:var(--panel-2);font-weight:var(--weight-medium)}
  .mobile-nav .footer-title{padding:12px 16px 0}
  .panel-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1/-1}
  .sec{padding-top:var(--space-6);padding-bottom:var(--space-6)}
  .cta-row{flex-wrap:wrap;justify-content:center}
}
@media(max-width:640px){
  .no-break{white-space:normal}
  .tilt{transform:none}
  .decor-zone,[data-parallax-decor]{max-width:100%}
  .panel{padding:var(--space-3)}
}
@media(max-width:360px){
  :root{--gutter:16px;--size-h1:36px}
  .brand{gap:6px}
  .brand-word{font-size:17px}
  .head-row{gap:8px}
  .btn-login{padding-inline:12px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none;transition:none}
  .btn,.main-nav a{transition:none}
}