:root{
  color-scheme:light;
  --bg:#F7F0E4;
  --bg-top:#FBF7EF;
  --bg-bottom:#F1E8D8;
  --panel:#FFFCF6;
  --panel-2:#EFE6D6;
  --border:#E3D8C6;
  --border-strong:#D3C4AD;
  --accent:#1FAF9D;
  --accent-ink:#13917F;
  --accent-dark:#0E7468;
  --accent-light:#8EDDD2;
  --accent-edge:#19998A;
  --accent-wash:rgb(31 175 157 / .17);
  --accent-wash-2:rgb(31 175 157 / .04);
  --shadow-tint:rgb(31 175 157 / .10);
  --shadow-tint-strong:rgb(31 175 157 / .16);
  --shadow-ink:rgb(42 33 24 / .06);
  --shadow-ink-strong:rgb(42 33 24 / .16);
  --switch-inset:rgb(14 116 104 / .28);
  --grid-line:rgb(42 33 24 / .04);
  --highlight:rgb(255 255 255 / .92);
  --topbar-bg:rgb(251 247 239 / .86);
  --line-ink:rgb(42 33 24 / .62);
  --text:#2A2118;
  --text-soft:#4A3E31;
  --muted:#6E6152;
  --faint:#9C8E7B;
  --dot:#D7C9B3;
  --dot-shade:rgb(42 33 24 / .10);
  --success:#2E8B57;
  --success-wash:rgb(46 139 87 / .16);
  --warn:#C98A1A;
  --error:#C0392B;
  --flag-red:#C8102E;
  --flag-blue:#253C8A;
  --flag-green:#0B8A47;
  --flag-white:#FFFFFF;
  --flag-edge:rgb(42 33 24 / .16);
  --mask-solid:#000000;
  --clear:transparent;
  --font-display:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","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;
  --size-body:15px;
  --size-small:13px;
  --size-h1:clamp(52px,4.31vw,62px);
  --size-h2:32px;
  --size-h3:20px;
  --r:8px;
  --r-sm:6px;
  --r-xs:4px;
  --r-ui:5px;
  --r-pill:999px;
  --r-round:50%;
  --shell:1200px;
  --reading:800px;
  --gutter:24px;
  --header-height:64px;
  --anchor-offset:80px;
  --toc-height:60px;
  --section-gap:64px;
  --ease:ease;
  --duration-fast:.15s;
  --duration-reveal:.55s;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-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(--size-body);font-weight:var(--weight-regular);line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
img{display:block;max-width:100%;height:auto}
svg{flex-shrink:0}
p,h1,h2,h3,h4,ul,ol,figure,blockquote{margin:0;padding:0}
ul,ol{list-style:none}
h1,h2,h3{font-family:var(--font-display);font-weight:var(--weight-bold);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:var(--size-h1);line-height:1.1;letter-spacing:-.02em}
h2{font-size:var(--size-h2);line-height:1.25;letter-spacing:-.02em}
h3{font-size:var(--size-h3);line-height:1.4}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--accent-dark);outline-offset:3px}
[hidden]{display:none!important}
.shell,.wrap{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.reading-wrap{width:100%;max-width:var(--reading);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--section-gap);padding-bottom:var(--section-gap)}
.section-heading{margin-bottom:24px}
.section-heading p{max-width:640px;margin-top:10px;color:var(--muted)}
.mono{font-family:var(--font-mono)}
.muted{color:var(--muted)}
.no-break{white-space:nowrap}
:where(.shell,.wrap,.reading-wrap,.card,.groove,article,section,main,nav)>*{min-width:0}
code{font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:20px;border:1px solid var(--border);border-radius:var(--r);background:var(--panel-2)}
pre code{white-space:pre;overflow-wrap:normal}
.prose{min-width:0;overflow-wrap:break-word}
.prose p{margin-block:16px;line-height:1.9}
.prose h2{margin-top:40px;margin-bottom:18px}
.prose h3{margin-top:28px;margin-bottom:12px}
.prose ul,.prose ol{padding-left:24px;margin-block:16px}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li+li{margin-top:8px}
.prose a:not(.btn){text-decoration:underline;text-underline-offset:3px}
.prose section[id]{scroll-margin-top:var(--anchor-offset)}
.decor-region{position:relative;overflow-x:clip;max-width:100%}
.decor-grid{position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(var(--grid-line) 1px,var(--clear) 1px),linear-gradient(90deg,var(--grid-line) 1px,var(--clear) 1px);background-size:32px 32px}
.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--r);box-shadow:inset 0 1px 0 var(--highlight),0 16px 40px var(--shadow-tint),0 1px 2px var(--shadow-ink)}
.groove{background:var(--panel-2);border:1px solid var(--border);border-radius:var(--r);box-shadow:inset 0 1px 2px var(--shadow-ink)}
.card-pad{padding:24px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:10px 20px;border:1px solid var(--border);border-radius:var(--r-sm);font-size:var(--size-body);font-weight:var(--weight-semibold);line-height:1.5;white-space:nowrap;flex-shrink:0;transition:transform var(--duration-fast) var(--ease),box-shadow var(--duration-fast) var(--ease)}
.btn svg{width:16px;height:16px}
.btn-primary{background:var(--accent);color:var(--text);border-color:var(--accent-edge);box-shadow:inset 0 1px 0 var(--highlight),0 10px 22px -6px var(--shadow-tint-strong)}
.btn-primary:hover{transform:translateY(-1px)}
.btn-ghost,.btn-secondary{background:var(--panel);color:var(--text);border-color:var(--line-ink);box-shadow:inset 0 1px 0 var(--highlight),0 1px 2px var(--shadow-ink)}
.btn-ghost:hover,.btn-secondary:hover{border-color:var(--text)}
.btn:active{transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.55;transform:none;pointer-events:none}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.badge{display:inline-flex;align-items:center;gap:10px;min-height:30px;max-width:100%;padding:4px 12px 4px 11px;border:1px solid var(--border);border-radius:var(--r-pill);background:var(--panel);font-size:12.5px;color:var(--muted);box-shadow:inset 0 1px 0 var(--highlight),0 1px 2px var(--shadow-ink);overflow-wrap:anywhere}
.badge-dot{width:8px;height:8px;flex-shrink:0;border-radius:var(--r-round);background:var(--success);box-shadow:0 0 0 3px var(--success-wash)}
.badge-fact{font-family:var(--font-mono);font-size:12px;font-weight:var(--weight-semibold);color:var(--text)}
.badge-sep{width:1px;height:12px;flex-shrink:0;background:var(--border-strong)}
.tag{display:inline-flex;align-items:center;max-width:100%;min-height:26px;padding:3px 9px;border:1px solid var(--border);border-radius:var(--r-xs);background:var(--panel-2);font-size:12px;overflow-wrap:anywhere;white-space:normal}
.svg-defs{position:absolute;width:0;height:0;overflow:hidden}
.fw{fill:var(--flag-white)}
.fr{fill:var(--flag-red)}
.fb{fill:var(--flag-blue)}
.fg{fill:var(--flag-green)}
.fe{fill:none;stroke:var(--flag-edge)}
.stop-a{stop-color:var(--accent)}
.stop-b{stop-color:var(--accent-dark)}
.icon{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
#site-header{position:sticky;top:0;z-index:60}
.topbar{position:relative;z-index:60;background:var(--topbar-bg);border-bottom:1px solid var(--border)}
.topbar::before{content:"";position:absolute;inset:0;z-index:-1;-webkit-backdrop-filter:saturate(1.2) blur(10px);backdrop-filter:saturate(1.2) blur(10px);pointer-events:none}
.topbar-in{display:flex;align-items:center;gap:32px;height:var(--header-height);flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;font-family:var(--font-display);font-weight:var(--weight-bold);font-size:19px;letter-spacing:-.015em;color:var(--text);min-height:28px}
.brand-mark{width:28px;height:28px;flex-shrink:0}
.dotnav{flex:1;min-width:0;overflow-x:auto}
.dotnav ul,.dotnav ol{display:flex;align-items:center;list-style:none;margin:0;padding:0;white-space:nowrap}
.dotnav li{display:flex;align-items:center;font-size:14px;color:var(--muted);flex-shrink:0}
.dotnav li+li::before{content:"·";margin-inline:11px;color:var(--faint);font-weight:var(--weight-bold)}
.dotnav a{display:inline-flex;align-items:center;min-height:30px;padding-block:6px;transition:color var(--duration-fast) var(--ease)}
.dotnav a:hover{color:var(--text)}
.dotnav a[aria-current="page"]{color:var(--text);font-weight:var(--weight-semibold)}
.topbar-tools{display:flex;align-items:center;gap:10px;flex-shrink:0}
.lang-control{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:34px;min-width:44px;width:auto;padding:0 10px;border:0;border-radius:var(--r-sm);background:var(--clear);color:var(--muted);font-size:13px}
.lang span{white-space:nowrap}
.lang:hover{background:var(--panel-2);color:var(--text)}
.lang svg{width:15px;height:15px}
.lang-panel{position:absolute;right:0;top:calc(100% + 10px);z-index:90;width:180px;padding:6px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r);box-shadow:0 16px 40px var(--shadow-tint)}
.lang-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:var(--r-xs);font-size:14px}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--panel-2)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;min-height:34px;padding:5px 16px;border:1px solid var(--line-ink);border-radius:var(--r-sm);background:var(--panel);color:var(--text);font-size:14px;font-weight:var(--weight-semibold);white-space:nowrap;box-shadow:inset 0 1px 0 var(--highlight),0 1px 2px var(--shadow-ink)}
.btn-login:hover{border-color:var(--text)}
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:4px;min-width:44px;min-height:44px;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--panel);color:var(--text)}
.menu-line{display:block;width:20px;height:2px;background:currentColor}
.mobile-drawer{display:none;position:fixed;top:var(--header-height);left:0;right:0;height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));z-index:70;padding:16px var(--gutter) 32px;background:var(--panel);overflow-y:auto;overscroll-behavior:contain;border-top:1px solid var(--border)}
.mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px;border-bottom:1px solid var(--border);font-size:15px}
.mobile-drawer a[aria-current]{background:var(--panel-2);font-weight:var(--weight-semibold)}
.drawer-label{margin:20px 12px 8px;color:var(--muted);font-size:13px}
html.nav-open{overflow:hidden}
.site-footer{padding-top:48px;padding-bottom:28px;background:var(--panel-2);border-top:1px solid var(--border)}
.footer-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:40px}
.footer-brand p{max-width:320px;margin-top:16px;color:var(--muted);font-size:14px}
.footer-heading{font-size:14px;font-weight:var(--weight-semibold);margin-bottom:12px}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 16px}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:28px;font-size:13px;color:var(--muted)}
.footer-links a:hover,.footer-languages a:hover,.footer-legal a:hover{color:var(--text);text-decoration:underline;text-underline-offset:3px}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:30px;padding-top:18px;border-top:1px solid var(--border-strong)}
.footer-languages a[aria-current]{font-weight:var(--weight-semibold);color:var(--text)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-top:16px;font-size:12px;color:var(--muted)}
.footer-legal{display:flex;flex-wrap:wrap;gap:16px}
.reveal{transition:opacity var(--duration-reveal) var(--ease),transform var(--duration-reveal) var(--ease)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{display:block;position:relative;min-width:0;max-width:100%;min-height:160px;overflow:hidden;margin-top:24px;margin-bottom:24px}
#server-status+*{margin-top:24px}
[data-counter]{display:inline-block;min-width:3ch;font-family:var(--font-mono);font-variant-numeric:tabular-nums;text-align:right}
@media(min-width:1101px){
  .topbar-in{gap:28px}
}
@media(max-width:1100px){
  .topbar-in{gap:16px}
  .dotnav{display:none}
  .topbar-tools{margin-left:auto}
  .menu-toggle{display:inline-flex}
  .mobile-drawer:not([hidden]){display:block}
}
@media(max-width:768px){
  :root{--size-h1:38px;--size-h2:28px;--section-gap:44px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1 / -1}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .no-break{white-space:normal}
  .tilt,.ticket{transform:none}
  .decor-region,.decor-grid{max-width:100%}
  .brand{font-size:17px;gap:7px}
  .brand-mark{width:25px;height:25px}
  .topbar-in{gap:8px}
  .topbar-tools{gap:4px;margin-left:auto}
  .lang{padding-inline:6px;font-size:11px;gap:3px}
  .lang svg{width:12px;height:12px}
  .btn-login{padding-inline:10px;font-size:13px}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-brand{grid-column:auto}
  .card-pad{padding:20px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:0s!important;animation-duration:0s!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}